DEV: Provide user input to services using params key

Currently in services, we don’t make a distinction between input
parameters, options and dependencies.

This can lead to user input modifying the service behavior, whereas it
was not the developer intention.

This patch addresses the issue by changing how data is provided to
services:
- `params` is now used to hold all data coming from outside (typically
  user input from a controller) and a contract will take its values from
  `params`.
- `options` is a new key to provide options to a service. This typically
  allows changing a service behavior at runtime. It is, of course,
  totally optional.
- `dependencies` is actually anything else provided to the service (like
  `guardian`) and available directly from the context object.

The `service_params` helper in controllers has been updated to reflect
those changes, so most of the existing services didn’t need specific
changes.

The options block has the same DSL as contracts, as it’s also based on
`ActiveModel`. There aren’t any validations, though. Here’s an example:
```ruby
options do
  attribute :allow_changing_hidden, :boolean, default: false
end
```
And here’s an example of how to call a service with the new keys:
```ruby
MyService.call(params: { key1: value1, … }, options: { my_option: true }, guardian:, …)
```

app/controllers/admin/config/about_controller.rb

@@ -38,14 +38,18 @@ class Admin::Config::AboutController < Admin::AdminController
     settings_map.each do |name, value|
       SiteSetting::Update.call(
         guardian:,
+        params: {
           setting_name: name,
           new_value: value,
+        },
+        options: {
           allow_changing_hidden: %i[
             extended_site_description
             extended_site_description_cooked
             about_banner_image
             community_owner
           ].include?(name),
+        },
       )
     end
     render json: success_json

app/controllers/admin/site_settings_controller.rb

@@ -39,7 +39,7 @@ class Admin::SiteSettingsController < Admin::AdminController
 
     previous_value = value_or_default(SiteSetting.get(id)) if update_existing_users
 
-    SiteSetting::Update.call(service_params.merge(setting_name: id, new_value: value)) do
+    SiteSetting::Update.call(params: { setting_name: id, new_value: value }, guardian:) do
       on_success do |contract:|
         if update_existing_users
           SiteSettingUpdateExistingUsers.call(id, contract.new_value, previous_value)

app/controllers/application_controller.rb

@@ -1164,6 +1164,6 @@ class ApplicationController < ActionController::Base
   end
 
   def service_params
-    params.to_unsafe_h.merge(guardian:)
+    { params: params.to_unsafe_h, guardian: }
   end
 end

app/services/admin_notices/dismiss.rb

@@ -16,8 +16,8 @@ class AdminNotices::Dismiss
     guardian.is_admin?
   end
 
-  def fetch_admin_notice(id:)
-    AdminNotice.find_by(id: id)
+  def fetch_admin_notice(params:)
+    AdminNotice.find_by(id: params[:id])
   end
 
   def destroy(admin_notice:)

app/services/experiments/toggle.rb

@@ -24,7 +24,7 @@ class Experiments::Toggle
   def toggle(contract:, guardian:)
     SiteSetting.set_and_log(
       contract.setting_name,
-      !SiteSetting.send(contract.setting_name),
+      !SiteSetting.public_send(contract.setting_name),
       guardian.user,
     )
   end

app/services/flags/destroy_flag.rb

@@ -14,8 +14,8 @@ class Flags::DestroyFlag
 
   private
 
-  def fetch_flag(id:)
-    Flag.find_by(id: id)
+  def fetch_flag(params:)
+    Flag.find_by(id: params[:id])
   end
 
   def not_system(flag:)

app/services/site_setting/update.rb

@@ -3,11 +3,12 @@
 class SiteSetting::Update
   include Service::Base
 
+  options { attribute :allow_changing_hidden, :boolean, default: false }
+
   policy :current_user_is_admin
   contract do
     attribute :setting_name
     attribute :new_value
-    attribute :allow_changing_hidden, :boolean, default: false
 
     before_validation do
       self.setting_name = setting_name&.to_sym
@@ -43,8 +44,8 @@ class SiteSetting::Update
     guardian.is_admin?
   end
 
-  def setting_is_visible(contract:)
-    contract.allow_changing_hidden || !SiteSetting.hidden_settings.include?(contract.setting_name)
+  def setting_is_visible(contract:, options:)
+    options.allow_changing_hidden || !SiteSetting.hidden_settings.include?(contract.setting_name)
   end
 
   def setting_is_configurable(contract:)

lib/service.rb

@@ -40,9 +40,9 @@ module Service
   #
   # @example An example from the {TrashChannel} service
   #   class TrashChannel
-  #     include Base
+  #     include Service::Base
   #
-  #     model :channel, :fetch_channel
+  #     model :channel
   #     policy :invalid_access
   #     transaction do
   #       step :prevents_slug_collision
@@ -79,17 +79,15 @@ module Service
   #   end
   # @example An example from the {UpdateChannelStatus} service which uses a contract
   #   class UpdateChannelStatus
-  #     include Base
+  #     include Service::Base
   #
-  #     model :channel, :fetch_channel
-  #     contract
-  #     policy :check_channel_permission
-  #     step :change_status
-  #
-  #     class Contract
+  #     model :channel
+  #     contract do
   #       attribute :status
   #       validates :status, inclusion: { in: Chat::Channel.editable_statuses.keys }
   #     end
+  #     policy :check_channel_permission
+  #     step :change_status
   #
   #     …
   #   end

lib/service/base.rb

@@ -18,7 +18,7 @@ module Service
 
     # Simple structure to hold the context of the service during its whole lifecycle.
     class Context
-      delegate :slice, to: :store
+      delegate :slice, :dig, to: :store
 
       def initialize(context = {})
         @store = context.symbolize_keys
@@ -115,6 +115,12 @@ module Service
       def transaction(&block)
         steps << TransactionStep.new(&block)
       end
+
+      def options(&block)
+        klass = Class.new(Service::OptionsBase).tap { _1.class_eval(&block) }
+        const_set("Options", klass)
+        steps << OptionsStep.new(:default, class_name: klass)
+      end
     end
 
     # @!visibility private
@@ -196,7 +202,7 @@ module Service
         attributes = class_name.attribute_names.map(&:to_sym)
         default_values = {}
         default_values = context[default_values_from].slice(*attributes) if default_values_from
-        contract = class_name.new(default_values.merge(context.slice(*attributes)))
+        contract = class_name.new(default_values.merge(context[:params].slice(*attributes)))
         context[contract_name] = contract
         context[result_key] = Context.build
         if contract.invalid?
@@ -208,9 +214,13 @@ module Service
       private
 
       def contract_name
-        return :contract if name.to_sym == :default
+        return :contract if default?
         :"#{name}_contract"
       end
+
+      def default?
+        name.to_sym == :default
+      end
     end
 
     # @!visibility private
@@ -229,6 +239,14 @@ module Service
       end
     end
 
+    # @!visibility private
+    class OptionsStep < Step
+      def call(instance, context)
+        context[result_key] = Context.build
+        context[:options] = class_name.new(context[:options])
+      end
+    end
+
     included do
       # The global context which is available from any step.
       attr_reader :context
@@ -263,7 +281,7 @@ module Service
     # customized by providing the +name+ argument).
     #
     # @example
-    #   model :channel, :fetch_channel
+    #   model :channel
     #
     #   private
     #
@@ -361,6 +379,17 @@ module Service
     #     step :log_channel_deletion
     #   end
 
+    # @!scope class
+    # @!method options(&block)
+    # @param block [Proc] a block containing options definition
+    # This is used to define options allowing to parameterize the service
+    # behavior. The resulting options are available in `context[:options]`.
+    #
+    # @example
+    #   options do
+    #     attribute :my_option, :boolean, default: false
+    #   end
+
     # @!visibility private
     def initialize(initial_context = {})
       @context = Context.build(initial_context.merge(__steps__: self.class.steps))

lib/service/options_base.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class Service::OptionsBase
+  include ActiveModel::API
+  include ActiveModel::Attributes
+  include ActiveModel::AttributeMethods
+end

lib/service/steps_inspector.rb

@@ -98,6 +98,10 @@ class Service::StepsInspector
       nil
     end
   end
+  #
+  # @!visibility private
+  class Options < Step
+  end
 
   attr_reader :steps, :result
 

plugins/chat/app/controllers/chat/api/channel_messages_controller.rb

@@ -67,8 +67,7 @@ class Chat::Api::ChannelMessagesController < Chat::ApiController
   def create
     Chat::MessageRateLimiter.run!(current_user)
 
-    # users can't force a thread through JSON API
-    Chat::CreateMessage.call(service_params.merge(force_thread: false)) do
+    Chat::CreateMessage.call(service_params) do
       on_success do |message_instance:|
         render json: success_json.merge(message_id: message_instance.id)
       end

plugins/chat/app/controllers/chat/api/channels_controller.rb

@@ -55,7 +55,7 @@ class Chat::Api::ChannelsController < Chat::ApiController
     # at the moment. This may change in future, at which point we will need to pass in
     # a chatable_type param as well and switch to the correct service here.
     Chat::CreateCategoryChannel.call(
-      service_params.merge(channel_params.merge(category_id: channel_params[:chatable_id])),
+      service_params.merge(params: channel_params.merge(category_id: channel_params[:chatable_id])),
     ) do
       on_success do |channel:, membership:|
         render_serialized(channel, Chat::ChannelSerializer, root: "channel", membership:)
@@ -95,7 +95,7 @@ class Chat::Api::ChannelsController < Chat::ApiController
       auto_join_limiter(channel_from_params).performed!
     end
 
-    Chat::UpdateChannel.call(service_params.merge(params_to_edit)) do
+    Chat::UpdateChannel.call(service_params.deep_merge(params: params_to_edit.to_unsafe_h)) do
       on_success do |channel:|
         render_serialized(
           channel,

plugins/chat/app/controllers/chat/incoming_webhooks_controller.rb

@@ -56,12 +56,12 @@ module Chat
       webhook.chat_channel.add(Discourse.system_user)
 
       Chat::CreateMessage.call(
-        service_params.merge(
+        params: {
           chat_channel_id: webhook.chat_channel_id,
-          guardian: Discourse.system_user.guardian,
           message: text,
+        },
+        guardian: Discourse.system_user.guardian,
         incoming_chat_webhook: webhook,
-        ),
       ) do
         on_success { render json: success_json }
         on_failure { render(json: failed_json, status: 422) }

plugins/chat/app/jobs/regular/chat/auto_join_channel_batch.rb

@@ -3,8 +3,8 @@
 module Jobs
   module Chat
     class AutoJoinChannelBatch < ::Jobs::Base
-      def execute(*)
-        ::Chat::AutoJoinChannelBatch.call(*) do
+      def execute(args)
+        ::Chat::AutoJoinChannelBatch.call(params: args) do
           on_failure { Rails.logger.error("Failed with unexpected error") }
           on_failed_contract do |contract|
             Rails.logger.error(contract.errors.full_messages.join(", "))

plugins/chat/app/jobs/regular/chat/auto_remove_membership_handle_category_updated.rb

@@ -4,7 +4,7 @@ module Jobs
   module Chat
     class AutoRemoveMembershipHandleCategoryUpdated < ::Jobs::Base
       def execute(args)
-        ::Chat::AutoRemove::HandleCategoryUpdated.call(**args)
+        ::Chat::AutoRemove::HandleCategoryUpdated.call(params: args)
       end
     end
   end

plugins/chat/app/jobs/regular/chat/auto_remove_membership_handle_chat_allowed_groups_change.rb

@@ -4,7 +4,7 @@ module Jobs
   module Chat
     class AutoRemoveMembershipHandleChatAllowedGroupsChange < ::Jobs::Base
       def execute(args)
-        ::Chat::AutoRemove::HandleChatAllowedGroupsChange.call(**args)
+        ::Chat::AutoRemove::HandleChatAllowedGroupsChange.call(params: args)
       end
     end
   end

plugins/chat/app/jobs/regular/chat/auto_remove_membership_handle_destroyed_group.rb

@@ -4,7 +4,7 @@ module Jobs
   module Chat
     class AutoRemoveMembershipHandleDestroyedGroup < ::Jobs::Base
       def execute(args)
-        ::Chat::AutoRemove::HandleDestroyedGroup.call(**args)
+        ::Chat::AutoRemove::HandleDestroyedGroup.call(params: args)
       end
     end
   end

plugins/chat/app/jobs/regular/chat/auto_remove_membership_handle_user_removed_from_group.rb

@@ -4,7 +4,7 @@ module Jobs
   module Chat
     class AutoRemoveMembershipHandleUserRemovedFromGroup < ::Jobs::Base
       def execute(args)
-        ::Chat::AutoRemove::HandleUserRemovedFromGroup.call(**args)
+        ::Chat::AutoRemove::HandleUserRemovedFromGroup.call(params: args)
       end
     end
   end

plugins/chat/app/services/chat/add_users_to_channel.rb

@@ -8,19 +8,21 @@ module Chat
   # @example
   #  ::Chat::AddUsersToChannel.call(
   #    guardian: guardian,
+  #    params: {
   #      channel_id: 1,
-  #    usernames: ["bob", "alice"]
+  #      usernames: ["bob", "alice"],
+  #    }
   #  )
   #
   class AddUsersToChannel
     include Service::Base
 
-    # @!method call(guardian:, **params_to_create)
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
-    #   @param [Integer] id of the channel
-    #   @param [Hash] params_to_create
-    #   @option params_to_create [Array<String>] usernames
-    #   @option params_to_create [Array<String>] groups
+    #   @param [Hash] params
+    #   @option params [Integer] :channel_id ID of the channel
+    #   @option params [Array<String>] :usernames
+    #   @option params [Array<String>] :groups
     #   @return [Service::Base::Context]
     contract do
       attribute :usernames, :array
@@ -123,6 +125,7 @@ module Chat
 
       ::Chat::CreateMessage.call(
         guardian: Discourse.system_user.guardian,
+        params: {
           chat_channel_id: channel.id,
           message:
             I18n.t(
@@ -131,6 +134,7 @@ module Chat
               inviting_user: "@#{guardian.user.username}",
               count: added_users.count,
             ),
+        },
       ) { on_failure { fail!(failure: "Failed to notice the channel") } }
     end
   end

plugins/chat/app/services/chat/auto_join_channel_batch.rb

@@ -6,9 +6,11 @@ module Chat
   #
   # @example
   #  Chat::AutoJoinChannelBatch.call(
+  #    params: {
   #      channel_id: 1,
   #      start_user_id: 27,
   #      end_user_id: 58,
+  #    }
   #  )
   #
   class AutoJoinChannelBatch

plugins/chat/app/services/chat/create_category_channel.rb

@@ -6,25 +6,27 @@ module Chat
   # @example
   #  Service::Chat::CreateCategoryChannel.call(
   #   guardian: guardian,
+  #   params: {
   #     name: "SuperChannel",
   #     description: "This is the best channel",
   #     slug: "super-channel",
   #     category_id: category.id,
   #     threading_enabled: true,
+  #   }
   #  )
   #
   class CreateCategoryChannel
     include Service::Base
 
-    # @!method call(guardian:, **params_to_create)
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
-    #   @param [Hash] params_to_create
-    #   @option params_to_create [String] name
-    #   @option params_to_create [String] description
-    #   @option params_to_create [String] slug
-    #   @option params_to_create [Boolean] auto_join_users
-    #   @option params_to_create [Integer] category_id
-    #   @option params_to_create [Boolean] threading_enabled
+    #   @param [Hash] params
+    #   @option params [String] :name
+    #   @option params [String] :description
+    #   @option params [String] :slug
+    #   @option params [Boolean] :auto_join_users
+    #   @option params [Integer] :category_id
+    #   @option params [Boolean] :threading_enabled
     #   @return [Service::Base::Context]
 
     policy :public_channels_enabled

plugins/chat/app/services/chat/create_direct_message_channel.rb

@@ -9,18 +9,20 @@ module Chat
   # @example
   #  ::Chat::CreateDirectMessageChannel.call(
   #    guardian: guardian,
-  #    target_usernames: ["bob", "alice"]
+  #    params: {
+  #      target_usernames: ["bob", "alice"],
+  #   },
   #  )
   #
   class CreateDirectMessageChannel
     include Service::Base
 
-    # @!method call(guardian:, **params_to_create)
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
-    #   @param [Hash] params_to_create
-    #   @option params_to_create [Array<String>] target_usernames
-    #   @option params_to_create [Array<String>] target_groups
-    #   @option params_to_create [Boolean] upsert
+    #   @param [Hash] params
+    #   @option params [Array<String>] :target_usernames
+    #   @option params [Array<String>] :target_groups
+    #   @option params [Boolean] :upsert
     #   @return [Service::Base::Context]
 
     contract do

plugins/chat/app/services/chat/create_message.rb

@@ -4,22 +4,34 @@ module Chat
   # Service responsible for creating a new message.
   #
   # @example
-  #  Chat::CreateMessage.call(chat_channel_id: 2, guardian: guardian, message: "A new message")
+  #  Chat::CreateMessage.call(params: { chat_channel_id: 2, message: "A new message" }, guardian: guardian)
   #
   class CreateMessage
     include Service::Base
 
-    # @!method call(chat_channel_id:, guardian:, in_reply_to_id:, message:, staged_id:, upload_ids:, thread_id:, incoming_chat_webhook:)
+    # @!method self.call(guardian:, params:, options:)
     #   @param guardian [Guardian]
-    #   @param chat_channel_id [Integer]
-    #   @param message [String]
-    #   @param in_reply_to_id [Integer] ID of a message to reply to
-    #   @param thread_id [Integer] ID of a thread to reply to
-    #   @param upload_ids [Array<Integer>] IDs of uploaded documents
-    #   @param context_topic_id [Integer] ID of the currently visible topic in drawer mode
-    #   @param context_post_ids [Array<Integer>] IDs of the currently visible posts in drawer mode
-    #   @param staged_id [String] arbitrary string that will be sent back to the client
-    #   @param incoming_chat_webhook [Chat::IncomingWebhook]
+    #   @param [Hash] params
+    #   @option params [Integer] :chat_channel_id
+    #   @option params [String] :message
+    #   @option params [Integer] :in_reply_to_id ID of a message to reply to
+    #   @option params [Integer] :thread_id ID of a thread to reply to
+    #   @option params [Array<Integer>] :upload_ids IDs of uploaded documents
+    #   @option params [Integer] :context_topic_id ID of the currently visible topic in drawer mode
+    #   @option params [Array<Integer>] :context_post_ids IDs of the currently visible posts in drawer mode
+    #   @option params [String] :staged_id arbitrary string that will be sent back to the client
+    #   @param [Hash] options
+    #   @option options [Chat::IncomingWebhook] :incoming_chat_webhook
+    #   @return [Service::Base::Context]
+
+    options do
+      attribute :streaming, :boolean, default: false
+      attribute :enforce_membership, :boolean, default: false
+      attribute :process_inline, :boolean, default: -> { Rails.env.test? }
+      attribute :force_thread, :boolean, default: false
+      attribute :strip_whitespaces, :boolean, default: true
+      attribute :created_by_sdk, :boolean, default: false
+    end
 
     policy :no_silenced_user
     contract do
@@ -31,13 +43,6 @@ module Chat
       attribute :staged_id, :string
       attribute :upload_ids, :array
       attribute :thread_id, :string
-      attribute :streaming, :boolean, default: false
-      attribute :enforce_membership, :boolean, default: false
-      attribute :incoming_chat_webhook
-      attribute :process_inline, :boolean, default: Rails.env.test?
-      attribute :force_thread, :boolean, default: false
-      attribute :strip_whitespaces, :boolean, default: true
-      attribute :created_by_sdk, :boolean, default: false
 
       validates :chat_channel_id, presence: true
       validates :message, presence: true, if: -> { upload_ids.blank? }
@@ -79,8 +84,8 @@ module Chat
       Chat::Channel.find_by_id_or_slug(contract.chat_channel_id)
     end
 
-    def enforce_membership(guardian:, channel:, contract:)
-      if guardian.user.bot? || contract.enforce_membership
+    def enforce_membership(guardian:, channel:, options:)
+      if guardian.user.bot? || options.enforce_membership
         channel.add(guardian.user)
 
         if channel.direct_message_channel?
@@ -102,7 +107,7 @@ module Chat
       reply&.chat_channel == channel
     end
 
-    def fetch_thread(contract:, reply:, channel:)
+    def fetch_thread(contract:, reply:, channel:, options:)
       return Chat::Thread.find_by(id: contract.thread_id) if contract.thread_id.present?
       return unless reply
       reply.thread ||
@@ -110,7 +115,7 @@ module Chat
           original_message: reply,
           original_message_user: reply.user,
           channel: channel,
-          force: contract.force_thread,
+          force: options.force_thread,
         )
     end
 
@@ -129,16 +134,16 @@ module Chat
       guardian.user.uploads.where(id: contract.upload_ids)
     end
 
-    def clean_message(contract:)
+    def clean_message(contract:, options:)
       contract.message =
         TextCleaner.clean(
           contract.message,
-          strip_whitespaces: contract.strip_whitespaces,
+          strip_whitespaces: options.strip_whitespaces,
           strip_zero_width_spaces: true,
         )
     end
 
-    def instantiate_message(channel:, guardian:, contract:, uploads:, thread:, reply:)
+    def instantiate_message(channel:, guardian:, contract:, uploads:, thread:, reply:, options:)
       channel.chat_messages.new(
         user: guardian.user,
         last_editor: guardian.user,
@@ -148,7 +153,7 @@ module Chat
         thread: thread,
         cooked: ::Chat::Message.cook(contract.message, user_id: guardian.user.id),
         cooked_version: ::Chat::Message::BAKED_VERSION,
-        streaming: contract.streaming,
+        streaming: options.streaming,
       )
     end
 
@@ -169,10 +174,10 @@ module Chat
       thread.add(thread.original_message_user)
     end
 
-    def create_webhook_event(contract:, message_instance:)
-      return if contract.incoming_chat_webhook.blank?
+    def create_webhook_event(message_instance:)
+      return if context[:incoming_chat_webhook].blank?
       message_instance.create_chat_webhook_event(
-        incoming_chat_webhook: contract.incoming_chat_webhook,
+        incoming_chat_webhook: context[:incoming_chat_webhook],
       )
     end
 
@@ -186,8 +191,8 @@ module Chat
       membership.update!(last_read_message: message_instance)
     end
 
-    def update_created_by_sdk(message_instance:, contract:)
-      message_instance.created_by_sdk = contract.created_by_sdk
+    def update_created_by_sdk(message_instance:, options:)
+      message_instance.created_by_sdk = options.created_by_sdk
     end
 
     def process_direct_message_channel(membership:)
@@ -200,7 +205,7 @@ module Chat
       Chat::Publisher.publish_thread_created!(channel, reply, thread.id)
     end
 
-    def process(channel:, message_instance:, contract:, thread:)
+    def process(channel:, message_instance:, contract:, thread:, options:)
       ::Chat::Publisher.publish_new!(channel, message_instance, contract.staged_id)
 
       DiscourseEvent.trigger(
@@ -218,7 +223,7 @@ module Chat
         },
       )
 
-      if contract.process_inline
+      if options.process_inline
         Jobs::Chat::ProcessMessage.new.execute(
           { chat_message_id: message_instance.id, staged_id: contract.staged_id },
         )

plugins/chat/app/services/chat/create_thread.rb

@@ -4,16 +4,17 @@ module Chat
   # Creates a thread.
   #
   # @example
-  #  Chat::CreateThread.call(channel_id: 2, original_message_id: 3, guardian: guardian, title: "Restaurant for Saturday")
+  #  Chat::CreateThread.call(guardian: guardian, params: { channel_id: 2, original_message_id: 3, title: "Restaurant for Saturday" })
   #
   class CreateThread
     include Service::Base
 
-    # @!method call(thread_id:, channel_id:, guardian:, **params_to_create)
-    #   @param [Integer] original_message_id
-    #   @param [Integer] channel_id
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
-    #   @option params_to_create [String,nil] title
+    #   @param [Hash] params
+    #   @option params [Integer] :original_message_id
+    #   @option params [Integer] :channel_id
+    #   @option params [String,nil] :title
     #   @return [Service::Base::Context]
 
     contract do

plugins/chat/app/services/chat/flag_message.rb

@@ -6,26 +6,27 @@ module Chat
   # @example
   #  ::Chat::FlagMessage.call(
   #    guardian: guardian,
+  #    params: {
   #      channel_id: 1,
   #      message_id: 43,
+  #    }
   #  )
   #
   class FlagMessage
     include Service::Base
 
-    # @!method call(guardian:, channel_id:, data:)
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
-    #   @param [Integer] channel_id of the channel
-    #   @param [Integer] message_id of the message
-    #   @param [Integer] flag_type_id - Type of flag to create
-    #   @param [String] optional message - Used when the flag type is notify_user or notify_moderators and we have to create
-    #     a separate PM.
-    #   @param [Boolean] optional is_warning - Staff can send warnings when using the notify_user flag.
-    #   @param [Boolean] optional take_action - Automatically approves the created reviewable and deletes the chat message.
-    #   @param [Boolean] optional queue_for_review - Adds a special reason to the reviewable score and creates the reviewable using
-    #     the force_review option.
-
+    #   @param [Hash] params
+    #   @option params [Integer] :channel_id of the channel
+    #   @option params [Integer] :message_id of the message
+    #   @option params [Integer] :flag_type_id Type of flag to create
+    #   @option params [String] :message (optional) Used when the flag type is notify_user or notify_moderators and we have to create a separate PM.
+    #   @option params [Boolean] :is_warning (optional) Staff can send warnings when using the notify_user flag.
+    #   @option params [Boolean] :take_action (optional) Automatically approves the created reviewable and deletes the chat message.
+    #   @option params [Boolean] :queue_for_review (optional) Adds a special reason to the reviewable score and creates the reviewable using the force_review option.
     #   @return [Service::Base::Context]
+
     contract do
       attribute :message_id, :integer
       attribute :channel_id, :integer

plugins/chat/app/services/chat/invite_users_to_channel.rb

@@ -4,16 +4,17 @@ module Chat
   # Invites users to a channel.
   #
   # @example
-  #  Chat::InviteUsersToChannel.call(channel_id: 2, user_ids: [2, 43], guardian: guardian, **optional_params)
+  #  Chat::InviteUsersToChannel.call(params: { channel_id: 2, user_ids: [2, 43] }, guardian: guardian)
   #
   class InviteUsersToChannel
     include Service::Base
 
-    # @!method call(user_ids:, channel_id:, guardian:)
-    #   @param [Array<Integer>] user_ids
-    #   @param [Integer] channel_id
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
-    #   @option optional_params [Integer, nil] message_id
+    #   @param [Hash] params
+    #   @option params [Array<Integer>] :user_ids
+    #   @option params [Integer] :channel_id
+    #   @option params [Integer, nil] :message_id
     #   @return [Service::Base::Context]
 
     contract do

plugins/chat/app/services/chat/leave_channel.rb

@@ -6,17 +6,20 @@ module Chat
   # @example
   #  ::Chat::LeaveChannel.call(
   #    guardian: guardian,
+  #    params: {
   #      channel_id: 1,
+  #    }
   #  )
   #
   class LeaveChannel
     include Service::Base
 
-    # @!method call(guardian:, channel_id:,)
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
-    #   @param [Integer] channel_id of the channel
-
+    #   @param [Hash] params
+    #   @option params [Integer] :channel_id ID of the channel
     #   @return [Service::Base::Context]
+
     contract do
       attribute :channel_id, :integer
 

plugins/chat/app/services/chat/list_channel_messages.rb

@@ -5,14 +5,15 @@ module Chat
   # or fetching paginated messages from last read.
   #
   # @example
-  #  Chat::ListChannelMessages.call(channel_id: 2, guardian: guardian, **optional_params)
+  #  Chat::ListChannelMessages.call(params: { channel_id: 2, **optional_params }, guardian: guardian)
   #
   class ListChannelMessages
     include Service::Base
 
-    # @!method call(guardian:)
-    #   @param [Integer] channel_id
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
+    #   @param [Hash] params
+    #   @option params [Integer] :channel_id
     #   @return [Service::Base::Context]
 
     contract do

plugins/chat/app/services/chat/list_channel_thread_messages.rb

@@ -5,14 +5,15 @@ module Chat
   # or fetching paginated messages from last read.
   #
   # @example
-  #  Chat::ListThreadMessages.call(thread_id: 2, guardian: guardian, **optional_params)
+  #  Chat::ListThreadMessages.call(params: { thread_id: 2, **optional_params }, guardian: guardian)
   #
   class ListChannelThreadMessages
     include Service::Base
 
-    # @!method call(guardian:)
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
-    #   @option optional_params [Integer] thread_id
+    #   @param [Hash] params
+    #   @option params [Integer] :thread_id
     #   @return [Service::Base::Context]
 
     contract do

plugins/chat/app/services/chat/list_user_channels.rb

@@ -4,12 +4,12 @@ module Chat
   # List of the channels a user is tracking
   #
   # @example
-  #  Chat::ListUserChannels.call(guardian: guardian, **optional_params)
+  #  Chat::ListUserChannels.call(guardian:)
   #
   class ListUserChannels
     include Service::Base
 
-    # @!method call(guardian:)
+    # @!method self.call(guardian:)
     #   @param [Guardian] guardian
     #   @return [Service::Base::Context]
 

plugins/chat/app/services/chat/lookup_channel_threads.rb

@@ -10,18 +10,19 @@ module Chat
   # of normal or tracking will be returned.
   #
   # @example
-  #  Chat::LookupChannelThreads.call(channel_id: 2, guardian: guardian, limit: 5, offset: 2)
+  #  Chat::LookupChannelThreads.call(params: { channel_id: 2, limit: 5, offset: 2 }, guardian: guardian)
   #
   class LookupChannelThreads
     include Service::Base
 
     THREADS_LIMIT = 10
 
-    # @!method call(channel_id:, guardian:, limit: nil, offset: nil)
-    #   @param [Integer] channel_id
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
-    #   @param [Integer] limit
-    #   @param [Integer] offset
+    #   @param [Hash] params
+    #   @option params [Integer] :channel_id
+    #   @option params [Integer] :limit
+    #   @option params [Integer] :offset
     #   @return [Service::Base::Context]
 
     contract do

plugins/chat/app/services/chat/lookup_thread.rb

@@ -5,15 +5,16 @@ module Chat
   # match, and the channel must specifically have threading enabled.
   #
   # @example
-  #  Chat::LookupThread.call(thread_id: 88, channel_id: 2, guardian: guardian)
+  #  Chat::LookupThread.call(params: { thread_id: 88, channel_id: 2 }, guardian: guardian)
   #
   class LookupThread
     include Service::Base
 
-    # @!method call(thread_id:, channel_id:, guardian:)
-    #   @param [Integer] thread_id
-    #   @param [Integer] channel_id
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
+    #   @param [Hash] params
+    #   @option params [Integer] :thread_id
+    #   @option params [Integer] :channel_id
     #   @return [Service::Base::Context]
 
     contract do

plugins/chat/app/services/chat/lookup_user_threads.rb

@@ -7,17 +7,18 @@ module Chat
   # of normal or tracking will be returned.
   #
   # @example
-  #  Chat::LookupUserThreads.call(guardian: guardian, limit: 5, offset: 2)
+  #  Chat::LookupUserThreads.call(guardian: guardian, params: { limit: 5, offset: 2 })
   #
   class LookupUserThreads
     include Service::Base
 
     THREADS_LIMIT = 10
 
-    # @!method call(guardian:, limit: nil, offset: nil)
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
-    #   @param [Integer] limit
-    #   @param [Integer] offset
+    #   @param [Hash] params
+    #   @option params [Integer] :limit
+    #   @option params [Integer] :offset
     #   @return [Service::Base::Context]
 
     contract do

plugins/chat/app/services/chat/mark_all_user_channels_read.rb

@@ -10,7 +10,7 @@ module Chat
   class MarkAllUserChannelsRead
     include ::Service::Base
 
-    # @!method call(guardian:)
+    # @!method self.call(guardian:)
     #   @param [Guardian] guardian
     #   @return [Service::Base::Context]
 

plugins/chat/app/services/chat/mark_thread_title_prompt_seen.rb

@@ -7,18 +7,21 @@ module Chat
   #
   # @example
   # Chat::MarkThreadTitlePromptSeen.call(
+  #   params: {
   #     thread_id: 88,
   #     channel_id: 2,
+  #   },
   #   guardian: guardian,
   # )
   #
   class MarkThreadTitlePromptSeen
     include Service::Base
 
-    # @!method call(thread_id:, channel_id:, guardian:)
-    #   @param [Integer] thread_id
-    #   @param [Integer] channel_id
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
+    #   @param [Hash] params
+    #   @option params [Integer] :thread_id
+    #   @option params [Integer] :channel_id
     #   @return [Service::Base::Context]
 
     contract do

plugins/chat/app/services/chat/publisher.rb

@@ -322,8 +322,10 @@ module Chat
       tracking_data =
         Chat::TrackingState.call(
           guardian: Guardian.new(user),
+          params: {
             channel_ids: channel_last_read_map.keys,
             include_missing_memberships: true,
+          },
         )
       if tracking_data.failure?
         raise StandardError,

plugins/chat/app/services/chat/restore_message.rb

@@ -6,15 +6,16 @@ module Chat
   # updated.
   #
   # @example
-  #  Chat::RestoreMessage.call(message_id: 2, channel_id: 1, guardian: guardian)
+  #  Chat::RestoreMessage.call(params: { message_id: 2, channel_id: 1 }, guardian: guardian)
   #
   class RestoreMessage
     include Service::Base
 
-    # @!method call(message_id:, channel_id:, guardian:)
-    #   @param [Integer] message_id
-    #   @param [Integer] channel_id
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
+    #   @param [Hash] params
+    #   @option params [Integer] :message_id
+    #   @option params [Integer] :channel_id
     #   @return [Service::Base::Context]
 
     contract do

plugins/chat/app/services/chat/search_chatable.rb

@@ -4,16 +4,17 @@ module Chat
   # Returns a list of chatables (users, groups ,category channels, direct message channels) that can be chatted with.
   #
   # @example
-  #  Chat::SearchChatable.call(term: "@bob", guardian: guardian)
+  #  Chat::SearchChatable.call(params: { term: "@bob" }, guardian: guardian)
   #
   class SearchChatable
     include Service::Base
 
     SEARCH_RESULT_LIMIT ||= 10
 
-    # @!method call(term:, guardian:)
-    #   @param [String] term
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
+    #   @param [Hash] params
+    #   @option params [String] :term
     #   @return [Service::Base::Context]
 
     contract do

plugins/chat/app/services/chat/stop_message_streaming.rb

@@ -4,14 +4,15 @@ module Chat
   # Service responsible for stopping streaming of a message.
   #
   # @example
-  #  Chat::StopMessageStreaming.call(message_id: 3, guardian: guardian)
+  #  Chat::StopMessageStreaming.call(params: { message_id: 3 }, guardian: guardian)
   #
   class StopMessageStreaming
     include ::Service::Base
 
-    # @!method call(message_id:, guardian:)
-    #   @param [Integer] message_id
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
+    #   @param [Hash] params
+    #   @option params [Integer] :message_id
     #   @return [Service::Base::Context]
     contract do
       attribute :message_id, :integer

plugins/chat/app/services/chat/tracking_state.rb

@@ -22,15 +22,16 @@ module Chat
   # Only channels with threads enabled will return thread tracking state.
   #
   # @example
-  #  Chat::TrackingState.call(channel_ids: [2, 3], thread_ids: [6, 7], guardian: guardian)
+  #  Chat::TrackingState.call(params: { channel_ids: [2, 3], thread_ids: [6, 7] }, guardian: guardian)
   #
   class TrackingState
     include Service::Base
 
-    # @!method call(thread_ids:, channel_ids:, guardian:)
-    #   @param [Integer] thread_ids
-    #   @param [Integer] channel_ids
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
+    #   @param [Hash] params
+    #   @option params [Integer] :thread_ids
+    #   @option params [Integer] :channel_ids
     #   @return [Service::Base::Context]
 
     contract do

plugins/chat/app/services/chat/trash_channel.rb

@@ -5,14 +5,15 @@ module Chat
   # Note the slug is modified to prevent collisions.
   #
   # @example
-  #  Chat::TrashChannel.call(channel_id: 2, guardian: guardian)
+  #  Chat::TrashChannel.call(params: { channel_id: 2 }, guardian: guardian)
   #
   class TrashChannel
     include Service::Base
 
-    # @!method call(channel_id:, guardian:)
-    #   @param [Integer] channel_id
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
+    #   @param [Hash] params
+    #   @option params [Integer] :channel_id
     #   @return [Service::Base::Context]
 
     DELETE_CHANNEL_LOG_KEY = "chat_channel_delete"
@@ -28,8 +29,8 @@ module Chat
 
     private
 
-    def fetch_channel(channel_id:)
-      Chat::Channel.find_by(id: channel_id)
+    def fetch_channel(params:)
+      Chat::Channel.find_by(id: params[:channel_id])
     end
 
     def invalid_access(guardian:, channel:)

plugins/chat/app/services/chat/trash_message.rb

@@ -6,15 +6,16 @@ module Chat
   # updated.
   #
   # @example
-  #  Chat::TrashMessage.call(message_id: 2, channel_id: 1, guardian: guardian)
+  #  Chat::TrashMessage.call(params: { message_id: 2, channel_id: 1 }, guardian: guardian)
   #
   class TrashMessage
     include Service::Base
 
-    # @!method call(message_id:, channel_id:, guardian:)
-    #   @param [Integer] message_id
-    #   @param [Integer] channel_id
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
+    #   @param [Hash] params
+    #   @option params [Integer] :message_id
+    #   @option params [Integer] :channel_id
     #   @return [Service::Base::Context]
 
     contract do

plugins/chat/app/services/chat/trash_messages.rb

@@ -6,15 +6,16 @@ module Chat
   # is updated.
   #
   # @example
-  #  Chat::TrashMessages.call(message_ids: [2, 3], channel_id: 1, guardian: guardian)
+  #  Chat::TrashMessages.call(params: { message_ids: [2, 3], channel_id: 1 }, guardian: guardian)
   #
   class TrashMessages
     include Service::Base
 
-    # @!method call(message_ids:, channel_id:, guardian:)
-    #   @param [Array<Integer>] message_ids
-    #   @param [Integer] channel_id
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
+    #   @param [Hash] params
+    #   @option params [Array<Integer>] :message_ids
+    #   @option params [Integer] :channel_id
     #   @return [Service::Base::Context]
 
     contract do

plugins/chat/app/services/chat/unfollow_channel.rb

@@ -6,17 +6,20 @@ module Chat
   # @example
   #  ::Chat::UnfollowChannel.call(
   #    guardian: guardian,
+  #    params: {
   #      channel_id: 1,
+  #    }
   #  )
   #
   class UnfollowChannel
     include Service::Base
 
-    # @!method call(guardian:, channel_id:,)
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
-    #   @param [Integer] channel_id of the channel
-
+    #   @param [Hash] params
+    #   @option params [Integer] :channel_id ID of the channel
     #   @return [Service::Base::Context]
+
     contract do
       attribute :channel_id, :integer
 

plugins/chat/app/services/chat/update_channel.rb

@@ -8,28 +8,30 @@ module Chat
   #
   # @example
   #  ::Chat::UpdateChannel.call(
-  #   channel_id: 2,
   #   guardian: guardian,
+  #   params:{
+  #     channel_id: 2,
   #     name: "SuperChannel",
   #     description: "This is the best channel",
   #     slug: "super-channel",
-  #   threading_enabled: true,
+  #     threading_enabled: true
+  #   },
   #  )
   #
+
   class UpdateChannel
     include Service::Base
 
-    # @!method call(channel_id:, guardian:, **params_to_edit)
-    #   @param [Integer] channel_id
+    # @!method self.call(params:, guardian:)
     #   @param [Guardian] guardian
-    #   @param [Hash] params_to_edit
-    #   @option params_to_edit [String,nil] name
-    #   @option params_to_edit [String,nil] description
-    #   @option params_to_edit [String,nil] slug
-    #   @option params_to_edit [Boolean] threading_enabled
-    #   @option params_to_edit [Boolean] auto_join_users Only valid for {CategoryChannel}. Whether active users
-    #    with permission to see the category should automatically join the channel.
-    #   @option params_to_edit [Boolean] allow_channel_wide_mentions Allow the use of @here and @all in the channel.
+    #   @param [Hash] params
+    #   @option params [Integer] :channel_id The channel ID
+    #   @option params [String,nil] :name
+    #   @option params [String,nil] :description
+    #   @option params [String,nil] :slug
+    #   @option params [Boolean] :threading_enabled
+    #   @option params [Boolean] :auto_join_users Only valid for {CategoryChannel}. Whether active users with permission to see the category should automatically join the channel.
+    #   @option params [Boolean] :allow_channel_wide_mentions Allow the use of @here and @all in the channel.
     #   @return [Service::Base::Context]
 
     model :channel
@@ -56,8 +58,8 @@ module Chat
 
     private
 
-    def fetch_channel(channel_id:)
-      Chat::Channel.find_by(id: channel_id)
+    def fetch_channel(params:)
+      Chat::Channel.find_by(id: params[:channel_id])
     end
 
     def check_channel_permission(guardian:, channel:)

plugins/chat/app/services/chat/update_channel_status.rb

@@ -4,15 +4,16 @@ module Chat
   # Service responsible for updating a chat channel status.
   #
   # @example
-  #  Chat::UpdateChannelStatus.call(channel_id: 2, guardian: guardian, status: "open")
+  #  Chat::UpdateChannelStatus.call(guardian: guardian, params: { status: "open", channel_id: 2 })
   #
   class UpdateChannelStatus
     include Service::Base
 
-    # @!method call(channel_id:, guardian:, status:)
-    #   @param [Integer] channel_id
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
-    #   @param [String] status
+    #   @param [Hash] params
+    #   @option params [Integer] :channel_id
+    #   @option params [String] :status
     #   @return [Service::Base::Context]
 
     model :channel, :fetch_channel
@@ -26,8 +27,8 @@ module Chat
 
     private
 
-    def fetch_channel(channel_id:)
-      Chat::Channel.find_by(id: channel_id)
+    def fetch_channel(params:)
+      Chat::Channel.find_by(id: params[:channel_id])
     end
 
     def check_channel_permission(guardian:, channel:, contract:)

plugins/chat/app/services/chat/update_message.rb

@@ -4,24 +4,32 @@ module Chat
   # Service responsible for updating a message.
   #
   # @example
-  #  Chat::UpdateMessage.call(message_id: 2, guardian: guardian, message: "A new message")
+  #  Chat::UpdateMessage.call(guardian: guardian, params: { message: "A new message", message_id: 2 })
   #
+
   class UpdateMessage
     include Service::Base
 
-    # @!method call(message_id:, guardian:, message:, upload_ids:)
+    # @!method self.call(guardian:, params:, options:)
     #   @param guardian [Guardian]
-    #   @param message_id [Integer]
-    #   @param message [String]
-    #   @param upload_ids [Array<Integer>] IDs of uploaded documents
+    #   @param [Hash] params
+    #   @option params [Integer] :message_id
+    #   @option params [String] :message
+    #   @option params [Array<Integer>] :upload_ids IDs of uploaded documents
+    #   @param [Hash] options
+    #   @option options [Boolean] (true) :strip_whitespaces
+    #   @option options [Boolean] :process_inline
+    #   @return [Service::Base::Context]
+
+    options do
+      attribute :strip_whitespaces, :boolean, default: true
+      attribute :process_inline, :boolean, default: -> { Rails.env.test? }
+    end
 
     contract do
       attribute :message_id, :string
       attribute :message, :string
       attribute :upload_ids, :array
-      attribute :streaming, :boolean, default: false
-      attribute :strip_whitespaces, :boolean, default: true
-      attribute :process_inline, :boolean, default: Rails.env.test?
 
       validates :message_id, presence: true
       validates :message, presence: true, if: -> { upload_ids.blank? }
@@ -82,12 +90,12 @@ module Chat
       guardian.can_edit_chat?(message)
     end
 
-    def clean_message(contract:)
+    def clean_message(contract:, options:)
       contract.message =
         TextCleaner.clean(
           contract.message,
-          strip_whitespaces: contract.strip_whitespaces,
           strip_zero_width_spaces: true,
+          strip_whitespaces: options.strip_whitespaces,
         )
     end
 
@@ -149,14 +157,14 @@ module Chat
       chars_edited > max_edited_chars
     end
 
-    def publish(message:, guardian:, contract:)
+    def publish(message:, guardian:, contract:, options:)
       edit_timestamp = context[:revision]&.created_at&.iso8601(6) || Time.zone.now.iso8601(6)
 
       ::Chat::Publisher.publish_edit!(message.chat_channel, message)
 
       DiscourseEvent.trigger(:chat_message_edited, message, message.chat_channel, message.user)
 
-      if contract.process_inline
+      if options.process_inline
         Jobs::Chat::ProcessMessage.new.execute(
           { chat_message_id: message.id, edit_timestamp: edit_timestamp },
         )

plugins/chat/app/services/chat/update_thread.rb

@@ -7,16 +7,16 @@ module Chat
   # Only the thread title can be updated.
   #
   # @example
-  #  Chat::UpdateThread.call(thread_id: 88, guardian: guardian, title: "Restaurant for Saturday")
+  #  Chat::UpdateThread.call(guardian: guardian, params: { thread_id: 88, title: "Restaurant for Saturday" })
   #
   class UpdateThread
     include Service::Base
 
-    # @!method call(thread_id:, channel_id:, guardian:, **params_to_edit)
-    #   @param [Integer] thread_id
-    #   @param [Integer] channel_id
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
-    #   @option params_to_edit [String,nil] title
+    #   @param [Hash] params
+    #   @option params [Integer] :thread_id
+    #   @option params [Integer] :channel_id
     #   @return [Service::Base::Context]
 
     contract do

plugins/chat/app/services/chat/update_thread_notification_settings.rb

@@ -7,20 +7,23 @@ module Chat
   #
   # @example
   # Chat::UpdateThreadNotificationSettings.call(
+  #   params: {
   #     thread_id: 88,
   #     channel_id: 2,
-  #   guardian: guardian,
   #     notification_level: notification_level,
+  #   },
+  #   guardian: guardian,
   # )
   #
   class UpdateThreadNotificationSettings
     include Service::Base
 
-    # @!method call(thread_id:, channel_id:, guardian:, notification_level:)
-    #   @param [Integer] thread_id
-    #   @param [Integer] channel_id
-    #   @param [Integer] notification_level
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
+    #   @param [Hash] params
+    #   @option params [Integer] :thread_id
+    #   @option params [Integer] :channel_id
+    #   @option params [Integer] :notification_level
     #   @return [Service::Base::Context]
 
     contract do

plugins/chat/app/services/chat/update_user_channel_last_read.rb

@@ -4,15 +4,16 @@ module Chat
   # Service responsible for updating the last read message id of a membership.
   #
   # @example
-  #  Chat::UpdateUserChannelLastRead.call(channel_id: 2, message_id: 3, guardian: guardian)
+  #  Chat::UpdateUserChannelLastRead.call(params: { channel_id: 2, message_id: 3 }, guardian: guardian)
   #
   class UpdateUserChannelLastRead
     include ::Service::Base
 
-    # @!method call(channel_id:, message_id:, guardian:)
-    #   @param [Integer] channel_id
-    #   @param [Integer] message_id
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
+    #   @param [Hash] params
+    #   @option params [Integer] :channel_id
+    #   @option params [Integer] :message_id
     #   @return [Service::Base::Context]
 
     contract do

plugins/chat/app/services/chat/update_user_thread_last_read.rb

@@ -5,16 +5,17 @@ module Chat
   # as read.
   #
   # @example
-  #  Chat::UpdateUserThreadLastRead.call(channel_id: 2, thread_id: 3, message_id: 4, guardian: guardian)
+  #  Chat::UpdateUserThreadLastRead.call(params: { channel_id: 2, thread_id: 3, message_id: 4 }, guardian: guardian)
   #
   class UpdateUserThreadLastRead
     include ::Service::Base
 
-    # @!method call(channel_id:, thread_id:, guardian:)
-    #   @param [Integer] channel_id
-    #   @param [Integer] thread_id
-    #   @param [Integer] message_id
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
+    #   @param [Hash] params
+    #   @option params [Integer] :channel_id
+    #   @option params [Integer] :thread_id
+    #   @option params [Integer] :message_id
     #   @return [Service::Base::Context]
 
     contract do

plugins/chat/app/services/chat/upsert_draft.rb

@@ -6,20 +6,24 @@ module Chat
   # @example
   #  ::Chat::UpsertDraft.call(
   #    guardian: guardian,
+  #    params: {
   #      channel_id: 1,
   #      thread_id: 1,
   #      data: { message: "foo" }
+  #    }
   #  )
   #
   class UpsertDraft
     include Service::Base
 
-    # @!method call(guardian:, channel_id:, thread_id:, data:)
+    # @!method self.call(guardian:, params:)
     #   @param [Guardian] guardian
-    #   @param [Integer] channel_id of the channel
-    #   @param [String] json object as string containing the data of the draft (message, uploads, replyToMsg and editing keys)
-    #   @option [Integer] thread_id of the channel
+    #   @param [Hash] params
+    #   @option params [Integer] :channel_id ID of the channel
+    #   @option params [String] :data JSON object as string containing the data of the draft (message, uploads, replyToMsg and editing keys)
+    #   @option params [Integer] :thread_id ID of the thread
     #   @return [Service::Base::Context]
+
     contract do
       attribute :channel_id, :integer
       validates :channel_id, presence: true

plugins/chat/lib/chat/channel_fetcher.rb

@@ -246,10 +246,12 @@ module Chat
 
     def self.tracking_state(channel_ids, guardian, include_threads: false)
       Chat::TrackingState.call(
-        channel_ids: channel_ids,
-        guardian: guardian,
+        guardian:,
+        params: {
           include_missing_memberships: true,
-        include_threads: include_threads,
+          channel_ids:,
+          include_threads:,
+        },
       ).report
     end
 

plugins/chat/lib/chat/message_mover.rb

@@ -236,8 +236,9 @@ module Chat
     def add_moved_placeholder(destination_channel, first_moved_message)
       @source_channel.add(Discourse.system_user)
       Chat::CreateMessage.call(
-        chat_channel_id: @source_channel.id,
         guardian: Discourse.system_user.guardian,
+        params: {
+          chat_channel_id: @source_channel.id,
           message:
             I18n.t(
               "chat.channel.messages_moved",
@@ -246,6 +247,7 @@ module Chat
               channel_name: destination_channel.title(@acting_user),
               first_moved_message_url: first_moved_message.url,
             ),
+        },
       )
     end
 

plugins/chat/lib/chat_sdk/channel.rb

@@ -11,12 +11,19 @@ module ChatSDK
     # @example Fetching messages from a channel with additional parameters
     #   ChatSDK::Channel.messages(channel_id: 1, guardian: Guardian.new)
     #
-    def self.messages(channel_id:, guardian:, **params)
-      new.messages(channel_id:, guardian:, **params)
+    def self.messages(...)
+      new.messages(...)
     end
 
     def messages(channel_id:, guardian:, **params)
-      Chat::ListChannelMessages.call(channel_id:, guardian:, **params, direction: "future") do
+      Chat::ListChannelMessages.call(
+        guardian:,
+        params: {
+          channel_id:,
+          direction: "future",
+          **params,
+        },
+      ) do
         on_success { |messages:| messages }
         on_failure { raise "Unexpected error" }
         on_failed_policy(:can_view_channel) { raise "Guardian can't view channel" }

plugins/chat/lib/chat_sdk/message.rb

@@ -24,8 +24,8 @@ module ChatSDK
     #   ChatSDK::Message.create_with_stream(raw: "Streaming message", channel_id: 1, guardian: Guardian.new) do |helper, message|
     #     helper.stream(raw: "Continuation of the message")
     #   end
-    def self.create(**params, &block)
-      new.create(**params, &block)
+    def self.create(...)
+      new.create(...)
     end
 
     # Creates a new message with streaming enabled by default.
@@ -46,8 +46,8 @@ module ChatSDK
     # @return [Chat::Message] The message object.
     # @example Streaming a message
     #   ChatSDK::Message.stream(message_id: 42, guardian: guardian, raw: "text")
-    def self.stream(raw:, message_id:, guardian:, &block)
-      new.stream(raw: raw, message_id: message_id, guardian: guardian, &block)
+    def self.stream(...)
+      new.stream(...)
     end
 
     # Starts streaming for a specific chat message.
@@ -57,8 +57,8 @@ module ChatSDK
     # @return [Chat::Message] The message object.
     # @example Starting the streaming of a message
     #   ChatSDK::Message.start_stream(message_id: 42, guardian: guardian)
-    def self.start_stream(message_id:, guardian:)
-      new.start_stream(message_id: message_id, guardian: guardian)
+    def self.start_stream(...)
+      new.start_stream(...)
     end
 
     # Stops streaming for a specific chat message.
@@ -68,8 +68,8 @@ module ChatSDK
     # @return [Chat::Message] The message object.
     # @example Stopping the streaming of a message
     #   ChatSDK::Message.stop_stream(message_id: 42, guardian: guardian)
-    def self.stop_stream(message_id:, guardian:)
-      new.stop_stream(message_id: message_id, guardian: guardian)
+    def self.stop_stream(...)
+      new.stop_stream(...)
     end
 
     def start_stream(message_id:, guardian:)
@@ -89,7 +89,7 @@ module ChatSDK
     end
 
     def stop_stream(message_id:, guardian:)
-      Chat::StopMessageStreaming.call(message_id:, guardian:) do
+      Chat::StopMessageStreaming.call(params: { message_id: }, guardian:) do
         on_success { |message:| message }
         on_model_not_found(:message) { raise "Couldn't find message with id: `#{message_id}`" }
         on_model_not_found(:membership) do
@@ -121,18 +121,22 @@ module ChatSDK
     )
       message =
         Chat::CreateMessage.call(
+          params: {
             message: raw,
-          guardian: guardian,
             chat_channel_id: channel_id,
-          in_reply_to_id: in_reply_to_id,
-          thread_id: thread_id,
-          upload_ids: upload_ids,
-          streaming: streaming,
-          enforce_membership: enforce_membership,
-          force_thread: force_thread,
-          strip_whitespaces: strip_whitespaces,
-          created_by_sdk: true,
+            in_reply_to_id:,
+            thread_id:,
+            upload_ids:,
             **params,
+          },
+          options: {
+            created_by_sdk: true,
+            streaming:,
+            enforce_membership:,
+            force_thread:,
+            strip_whitespaces:,
+          },
+          guardian:,
         ) do
           on_model_not_found(:channel) { raise "Couldn't find channel with id: `#{channel_id}`" }
           on_model_not_found(:membership) do
@@ -176,11 +180,14 @@ module ChatSDK
       return false if !message.streaming || !raw
 
       Chat::UpdateMessage.call(
+        guardian: guardian,
+        params: {
           message_id: message.id,
           message: message.message + raw,
-        guardian: guardian,
-        streaming: true,
+        },
+        options: {
           strip_whitespaces: false,
+        },
       ) { on_failure { raise "Unexpected error" } }
 
       message

plugins/chat/lib/chat_sdk/thread.rb

@@ -13,7 +13,7 @@ module ChatSDK
     #   ChatSDK::Thread.update_title(title: "New Thread Title", thread_id: 1, guardian: Guardian.new)
     #
     def self.update_title(thread_id:, guardian:, title:)
-      new.update(title: title, thread_id: thread_id, guardian: guardian)
+      new.update(thread_id:, guardian:, title:)
     end
 
     # Retrieves messages from a specified thread.
@@ -25,8 +25,8 @@ module ChatSDK
     # @example Fetching messages from a thread with additional parameters
     #   ChatSDK::Thread.messages(thread_id: 1, guardian: Guardian.new)
     #
-    def self.messages(thread_id:, guardian:, **params)
-      new.messages(thread_id: thread_id, guardian: guardian, **params)
+    def self.messages(...)
+      new.messages(...)
     end
 
     # Fetches the first messages from a specified chat thread, starting from the first available message.
@@ -41,9 +41,9 @@ module ChatSDK
     #
     def self.first_messages(thread_id:, guardian:, page_size: 10)
       new.messages(
-        thread_id: thread_id,
-        guardian: guardian,
-        page_size: page_size,
+        thread_id:,
+        guardian:,
+        page_size:,
         direction: "future",
         fetch_from_first_message: true,
       )
@@ -61,20 +61,27 @@ module ChatSDK
     #
     def self.last_messages(thread_id:, guardian:, page_size: 10)
       new.messages(
-        thread_id: thread_id,
-        guardian: guardian,
-        page_size: page_size,
+        thread_id:,
+        guardian:,
+        page_size:,
         direction: "past",
         fetch_from_last_message: true,
       )
     end
 
-    def self.update(**params)
-      new.update(**params)
+    def self.update(...)
+      new.update(...)
     end
 
     def messages(thread_id:, guardian:, direction: "future", **params)
-      Chat::ListChannelThreadMessages.call(thread_id:, guardian:, direction:, **params) do
+      Chat::ListChannelThreadMessages.call(
+        guardian:,
+        params: {
+          thread_id:,
+          direction:,
+          **params,
+        },
+      ) do
         on_success { |messages:| messages }
         on_failed_policy(:can_view_thread) { raise "Guardian can't view thread" }
         on_failed_policy(:target_message_exists) { raise "Target message doesn't exist" }
@@ -82,8 +89,8 @@ module ChatSDK
       end
     end
 
-    def update(**params)
-      Chat::UpdateThread.call(params) do
+    def update(guardian:, **params)
+      Chat::UpdateThread.call(guardian:, params:) do
         on_model_not_found(:channel) do
           raise "Couldn’t find channel with id: `#{params[:channel_id]}`"
         end

plugins/chat/plugin.rb

@@ -472,9 +472,11 @@ after_initialize do
 
       creator =
         ::Chat::CreateMessage.call(
-          chat_channel_id: channel.id,
           guardian: sender.guardian,
+          params: {
+            chat_channel_id: channel.id,
             message: utils.apply_placeholders(fields.dig("message", "value"), placeholders),
+          },
         )
 
       if creator.failure?

plugins/chat/spec/fabricators/chat_fabricator.rb

@@ -93,16 +93,20 @@ Fabricator(:chat_message_with_service, class_name: "Chat::CreateMessage") do
 
     result =
       resolved_class.call(
+        params: {
           chat_channel_id: channel.id,
-        guardian: user.guardian,
           message:
             transients[:message] ||
               Faker::Alphanumeric.alpha(number: SiteSetting.chat_minimum_message_length),
           thread_id: transients[:thread]&.id,
           in_reply_to_id: transients[:in_reply_to]&.id,
           upload_ids: transients[:upload_ids],
-        incoming_chat_webhook: transients[:incoming_chat_webhook],
+        },
+        options: {
           process_inline: true,
+        },
+        guardian: user.guardian,
+        incoming_chat_webhook: transients[:incoming_chat_webhook],
       )
 
     if result.failure?

plugins/chat/spec/integration/thread_replies_count_cache_accuracy_spec.rb

@@ -24,10 +24,12 @@ RSpec.describe "Chat::Thread replies_count cache accuracy" do
     # Create 5 replies
     5.times do |i|
       Chat::CreateMessage.call(
-        chat_channel_id: thread.channel_id,
         guardian: guardian,
+        params: {
+          chat_channel_id: thread.channel_id,
           thread_id: thread.id,
           message: "Hello world #{i}",
+        },
       )
     end
 
@@ -39,10 +41,12 @@ RSpec.describe "Chat::Thread replies_count cache accuracy" do
     # Travel to the future so the cache expires.
     travel_to 6.minutes.from_now
     Chat::CreateMessage.call(
-      chat_channel_id: thread.channel_id,
       guardian: guardian,
+      params: {
+        chat_channel_id: thread.channel_id,
         thread_id: thread.id,
         message: "Hello world now that time has passed",
+      },
     )
     expect(thread.replies_count_cache).to eq(6)
     expect(thread.reload.replies_count).to eq(6)

plugins/chat/spec/jobs/regular/chat/notify_mentioned_spec.rb

@@ -15,7 +15,9 @@ describe Jobs::Chat::NotifyMentioned do
     result =
       Chat::CreateDirectMessageChannel.call(
         guardian: user_1.guardian,
+        params: {
           target_usernames: [user_1.username, user_2.username],
+        },
       )
 
     service_failed!(result) if result.failure?

plugins/chat/spec/lib/chat/notifier_spec.rb

@@ -145,8 +145,10 @@ describe Chat::Notifier do
 
           Chat::UpdateMessage.call(
             guardian: user_1.guardian,
+            params: {
               message_id: msg.id,
               message: "hello @all",
+            },
           )
 
           described_class.new(msg, msg.created_at).notify_edit
@@ -425,7 +427,9 @@ describe Chat::Notifier do
           result =
             Chat::CreateDirectMessageChannel.call(
               guardian: user_1.guardian,
+              params: {
                 target_usernames: [user_1.username, user_2.username],
+              },
             )
           service_failed!(result) if result.failure?
           result.channel

plugins/chat/spec/lib/chat/review_queue_spec.rb

@@ -115,8 +115,10 @@ describe Chat::ReviewQueue do
       it "ignores the cooldown window when the message is edited" do
         Chat::UpdateMessage.call(
           guardian: Guardian.new(message.user),
+          params: {
             message_id: message.id,
             message: "I'm editing this message. Please flag it.",
+          },
         )
 
         expect(second_flag_result).to include success: true

plugins/chat/spec/plugin_helper.rb

@@ -38,11 +38,13 @@ module ChatSystemHelpers
       last_user = ((users - [last_user]).presence || users).sample
       creator =
         Chat::CreateMessage.call(
+          guardian: last_user.guardian,
+          params: {
             chat_channel_id: channel.id,
             in_reply_to_id: in_reply_to,
             thread_id: thread_id,
-          guardian: last_user.guardian,
             message: Faker::Alphanumeric.alpha(number: SiteSetting.chat_minimum_message_length),
+          },
         )
 
       raise "#{creator.inspect_steps.inspect}\n\n#{creator.inspect_steps.error}" if creator.failure?
@@ -69,10 +71,14 @@ module ChatSpecHelpers
   def update_message!(message, text: nil, user: Discourse.system_user, upload_ids: nil)
     Chat::UpdateMessage.call(
       guardian: user.guardian,
+      params: {
         message_id: message.id,
         upload_ids: upload_ids,
         message: text,
+      },
+      options: {
         process_inline: true,
+      },
     ) do |result|
       on_success { result.message_instance }
       on_failure { service_failed!(result) }
@@ -81,8 +87,10 @@ module ChatSpecHelpers
 
   def trash_message!(message, user: Discourse.system_user)
     Chat::TrashMessage.call(
+      params: {
         message_id: message.id,
         channel_id: message.chat_channel_id,
+      },
       guardian: user.guardian,
     ) do |result|
       on_success { result }
@@ -92,8 +100,10 @@ module ChatSpecHelpers
 
   def restore_message!(message, user: Discourse.system_user)
     Chat::RestoreMessage.call(
+      params: {
         message_id: message.id,
         channel_id: message.chat_channel_id,
+      },
       guardian: user.guardian,
     ) do |result|
       on_success { result }
@@ -104,8 +114,10 @@ module ChatSpecHelpers
   def add_users_to_channel(users, channel, user: Discourse.system_user)
     ::Chat::AddUsersToChannel.call(
       guardian: user.guardian,
+      params: {
         channel_id: channel.id,
         usernames: Array(users).map(&:username),
+      },
     ) do |result|
       on_success { result }
       on_failure { service_failed!(result) }
@@ -121,9 +133,11 @@ module ChatSpecHelpers
 
     ::Chat::UpsertDraft.call(
       guardian: user.guardian,
+      params: {
         channel_id: channel.id,
         thread_id: thread&.id,
         data: data.to_json,
+      },
     ) do |result|
       on_success { result }
       on_failure { service_failed!(result) }

plugins/chat/spec/services/auto_remove/handle_category_updated_spec.rb

@@ -2,7 +2,7 @@
 
 RSpec.describe Chat::AutoRemove::HandleCategoryUpdated do
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:) }
 
     let(:params) { { category_id: updated_category.id } }
 

plugins/chat/spec/services/auto_remove/handle_chat_allowed_groups_change_spec.rb

@@ -2,9 +2,9 @@
 
 RSpec.describe Chat::AutoRemove::HandleChatAllowedGroupsChange do
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:) }
 
-    let(:params) { { new_allowed_groups: new_allowed_groups } }
+    let(:params) { { new_allowed_groups: } }
     fab!(:user_1) { Fabricate(:user, refresh_auto_groups: true) }
     fab!(:user_2) { Fabricate(:user, refresh_auto_groups: true) }
     fab!(:admin_1) { Fabricate(:admin) }

plugins/chat/spec/services/auto_remove/handle_destroyed_group_spec.rb

@@ -6,7 +6,7 @@ RSpec.describe Chat::AutoRemove::HandleDestroyedGroup do
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:) }
 
     let(:params) { { destroyed_group_user_ids: [admin_1.id, admin_2.id, user_1.id, user_2.id] } }
     fab!(:user_1) { Fabricate(:user, refresh_auto_groups: true) }

plugins/chat/spec/services/auto_remove/handle_user_removed_from_group_spec.rb

@@ -2,7 +2,7 @@
 
 RSpec.describe Chat::AutoRemove::HandleUserRemovedFromGroup do
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:) }
 
     let(:params) { { user_id: removed_user.id } }
     fab!(:removed_user) { Fabricate(:user) }

plugins/chat/spec/services/chat/add_users_to_channel_spec.rb

@@ -10,7 +10,7 @@ RSpec.describe Chat::AddUsersToChannel do
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:, **dependencies) }
 
     fab!(:current_user) { Fabricate(:user) }
     fab!(:users) { Fabricate.times(5, :user) }
@@ -21,9 +21,8 @@ RSpec.describe Chat::AddUsersToChannel do
     fab!(:group) { Fabricate(:public_group, users: [group_user_1, group_user_2]) }
 
     let(:guardian) { Guardian.new(current_user) }
-    let(:params) do
-      { guardian: guardian, channel_id: channel.id, usernames: users.map(&:username) }
-    end
+    let(:params) { { channel_id: channel.id, usernames: users.map(&:username) } }
+    let(:dependencies) { { guardian: } }
 
     context "when all steps pass" do
       before { channel.add(current_user) }

plugins/chat/spec/services/chat/auto_join_channel_batch_spec.rb

@@ -45,7 +45,7 @@ describe Chat::AutoJoinChannelBatch do
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:) }
 
     fab!(:channel) { Fabricate(:chat_channel, auto_join_users: true) }
 

plugins/chat/spec/services/chat/create_category_channel_spec.rb

@@ -1,35 +1,21 @@
 # frozen_string_literal: true
 
 RSpec.describe Chat::CreateCategoryChannel do
-  describe Chat::CreateCategoryChannel::Contract, type: :model do
+  describe described_class::Contract, type: :model do
     it { is_expected.to validate_presence_of :category_id }
     it { is_expected.to validate_length_of(:name).is_at_most(SiteSetting.max_topic_title_length) }
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:, **dependencies) }
 
     fab!(:current_user) { Fabricate(:admin) }
     fab!(:category)
     let(:category_id) { category.id }
 
     let(:guardian) { Guardian.new(current_user) }
-    let(:params) { { guardian: guardian, category_id: category_id, name: "cool channel" } }
-
-    it "can create several channels with empty slugs" do
-      SiteSetting.slug_generation_method = "none"
-      expect do
-        described_class.call(params.merge(name: "channel 1", slug: nil))
-      end.not_to raise_error
-      expect do
-        described_class.call(params.merge(name: "channel 2", slug: nil))
-      end.not_to raise_error
-    end
-
-    it "can create several channels with unicode names" do
-      expect do described_class.call(params.merge(name: "マイキ")) end.not_to raise_error
-      expect do described_class.call(params.merge(name: "境界")) end.not_to raise_error
-    end
+    let(:params) { { category_id:, name: "cool channel" } }
+    let(:dependencies) { { guardian: } }
 
     context "when public channels are disabled" do
       fab!(:current_user) { Fabricate(:user) }

plugins/chat/spec/services/chat/create_direct_message_channel_spec.rb

@@ -29,7 +29,7 @@ RSpec.describe Chat::CreateDirectMessageChannel do
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:, **dependencies) }
 
     fab!(:current_user) { Fabricate(:user, username: "guybrush", refresh_auto_groups: true) }
     fab!(:user_1) { Fabricate(:user, username: "lechuck") }
@@ -40,7 +40,8 @@ RSpec.describe Chat::CreateDirectMessageChannel do
     let(:guardian) { Guardian.new(current_user) }
     let(:target_usernames) { [user_1.username, user_2.username] }
     let(:name) { "" }
-    let(:params) { { guardian: guardian, target_usernames: target_usernames, name: name } }
+    let(:params) { { target_usernames:, name: } }
+    let(:dependencies) { { guardian: } }
 
     context "when all steps pass" do
       it { is_expected.to run_successfully }
@@ -117,7 +118,7 @@ RSpec.describe Chat::CreateDirectMessageChannel do
           let(:name) { "Monkey Island" }
 
           it "creates a second channel" do
-            described_class.call(params)
+            described_class.call(params:, **dependencies)
 
             expect { result }.to change { Chat::Channel.count }.and change {
                     Chat::DirectMessage.count
@@ -129,7 +130,7 @@ RSpec.describe Chat::CreateDirectMessageChannel do
           let(:target_usernames) { [user_1.username, user_2.username] }
 
           it "creates a second channel" do
-            described_class.call(params)
+            described_class.call(params:, **dependencies)
 
             expect { result }.to change { Chat::Channel.count }.and change {
                     Chat::DirectMessage.count
@@ -141,7 +142,7 @@ RSpec.describe Chat::CreateDirectMessageChannel do
           let(:target_usernames) { [user_1.username] }
 
           it "reuses the existing channel" do
-            existing_channel = described_class.call(params).channel
+            existing_channel = described_class.call(params:, **dependencies).channel
 
             expect(result.channel.id).to eq(existing_channel.id)
           end
@@ -151,8 +152,9 @@ RSpec.describe Chat::CreateDirectMessageChannel do
           let(:target_usernames) { [user_1.username] }
 
           it "returns the non group existing channel" do
-            group_channel = described_class.call(params.merge(name: "cats")).channel
-            channel = described_class.call(params).channel
+            group_channel =
+              described_class.call(params: params.merge(name: "cats"), **dependencies).channel
+            channel = described_class.call(params:, **dependencies).channel
 
             expect(result.channel.id).to_not eq(group_channel.id)
             expect(result.channel.id).to eq(channel.id)

plugins/chat/spec/services/chat/create_message_spec.rb

@@ -20,7 +20,7 @@ RSpec.describe Chat::CreateMessage do
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:, options:, **dependencies) }
 
     fab!(:user)
     fab!(:other_user) { Fabricate(:user) }
@@ -35,16 +35,15 @@ RSpec.describe Chat::CreateMessage do
     let(:context_post_ids) { nil }
     let(:params) do
       {
-        enforce_membership: false,
-        guardian: guardian,
         chat_channel_id: channel.id,
         message: content,
         upload_ids: [upload.id],
         context_topic_id: context_topic_id,
         context_post_ids: context_post_ids,
-        force_thread: false,
       }
     end
+    let(:options) { { enforce_membership: false, force_thread: false } }
+    let(:dependencies) { { guardian: } }
     let(:message) { result[:message_instance].reload }
 
     before { channel.add(guardian.user) }
@@ -74,9 +73,12 @@ RSpec.describe Chat::CreateMessage do
       end
 
       context "when strip_whitespace is disabled" do
-        it "doesn't strip newlines" do
-          params[:strip_whitespaces] = false
+        before do
+          options[:strip_whitespaces] = false
           params[:message] = "aaaaaaa\n"
+        end
+
+        it "doesn't strip newlines" do
           expect(message.message).to eq("aaaaaaa\n")
         end
       end
@@ -84,7 +86,7 @@ RSpec.describe Chat::CreateMessage do
       context "when coming from a webhook" do
         let(:incoming_webhook) { Fabricate(:incoming_chat_webhook, chat_channel: channel) }
 
-        before { params[:incoming_chat_webhook] = incoming_webhook }
+        before { dependencies[:incoming_chat_webhook] = incoming_webhook }
 
         it "creates a webhook event" do
           expect { result }.to change { Chat::WebhookEvent.count }.by(1)
@@ -104,16 +106,22 @@ RSpec.describe Chat::CreateMessage do
         result
       end
 
-      it "can enqueue a job to process message" do
-        params[:process_inline] = false
+      context "when process_inline is false" do
+        before { options[:process_inline] = false }
+
+        it "enqueues a job to process message" do
           expect_enqueued_with(job: Jobs::Chat::ProcessMessage) { result }
         end
+      end
 
-      it "can process a message inline" do
-        params[:process_inline] = true
+      context "when process_inline is true" do
+        before { options[:process_inline] = true }
+
+        it "processes a message inline" do
           Jobs::Chat::ProcessMessage.any_instance.expects(:execute).once
           expect_not_enqueued_with(job: Jobs::Chat::ProcessMessage) { result }
         end
+      end
 
       it "triggers a Discourse event" do
         DiscourseEvent.expects(:trigger).with(
@@ -127,11 +135,11 @@ RSpec.describe Chat::CreateMessage do
         result
       end
 
-      context "when context given" do
+      context "when a context is given" do
         let(:context_post_ids) { [1, 2] }
         let(:context_topic_id) { 3 }
 
-        it "triggers a Discourse event with context if given" do
+        it "triggers a Discourse event with context" do
           DiscourseEvent.expects(:trigger).with(
             :chat_message_created,
             instance_of(Chat::Message),
@@ -245,7 +253,7 @@ RSpec.describe Chat::CreateMessage do
 
             before do
               SiteSetting.chat_allowed_groups = Group::AUTO_GROUPS[:everyone]
-              params[:enforce_membership] = true
+              options[:enforce_membership] = true
             end
 
             it { is_expected.to run_successfully }
@@ -345,7 +353,7 @@ RSpec.describe Chat::CreateMessage do
                         end
 
                         context "when thread is forced" do
-                          before { params[:force_thread] = true }
+                          before { options[:force_thread] = true }
 
                           it "publishes the new thread" do
                             Chat::Publisher.expects(:publish_thread_created!).with(

plugins/chat/spec/services/chat/create_thread_spec.rb

@@ -8,7 +8,7 @@ RSpec.describe Chat::CreateThread do
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:, **dependencies) }
 
     fab!(:current_user) { Fabricate(:user) }
     fab!(:channel_1) { Fabricate(:chat_channel, threading_enabled: true) }
@@ -16,14 +16,8 @@ RSpec.describe Chat::CreateThread do
 
     let(:guardian) { Guardian.new(current_user) }
     let(:title) { nil }
-    let(:params) do
-      {
-        guardian: guardian,
-        original_message_id: message_1.id,
-        channel_id: channel_1.id,
-        title: title,
-      }
-    end
+    let(:params) { { original_message_id: message_1.id, channel_id: channel_1.id, title: } }
+    let(:dependencies) { { guardian: } }
 
     context "when all steps pass" do
       it { is_expected.to run_successfully }
@@ -101,8 +95,10 @@ RSpec.describe Chat::CreateThread do
       before do
         Chat::CreateThread.call(
           guardian: current_user.guardian,
+          params: {
             original_message_id: message_1.id,
             channel_id: channel_1.id,
+          },
         )
       end
 

plugins/chat/spec/services/chat/flag_message_spec.rb

@@ -11,7 +11,7 @@ RSpec.describe Chat::FlagMessage do
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:, **dependencies) }
 
     fab!(:current_user) { Fabricate(:user) }
     fab!(:channel_1) { Fabricate(:chat_channel) }
@@ -26,7 +26,6 @@ RSpec.describe Chat::FlagMessage do
     let(:take_action) { nil }
     let(:params) do
       {
-        guardian: guardian,
         channel_id: channel_id,
         message_id:,
         flag_type_id: flag_type_id,
@@ -35,6 +34,7 @@ RSpec.describe Chat::FlagMessage do
         take_action: take_action,
       }
     end
+    let(:dependencies) { { guardian: } }
 
     before { SiteSetting.direct_message_enabled_groups = Group::AUTO_GROUPS[:everyone] }
 

plugins/chat/spec/services/chat/invite_users_to_channel_spec.rb

@@ -7,7 +7,7 @@ RSpec.describe Chat::InviteUsersToChannel do
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(**params, **dependencies) }
+    subject(:result) { described_class.call(params:, **dependencies) }
 
     fab!(:current_user) { Fabricate(:admin) }
     fab!(:user_1) { Fabricate(:user) }

plugins/chat/spec/services/chat/leave_channel_spec.rb

@@ -2,24 +2,22 @@
 
 RSpec.describe Chat::LeaveChannel do
   describe described_class::Contract, type: :model do
-    subject(:contract) { described_class.new }
-
     it { is_expected.to validate_presence_of(:channel_id) }
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:, **dependencies) }
 
     fab!(:channel_1) { Fabricate(:chat_channel) }
     fab!(:current_user) { Fabricate(:user) }
 
     let(:guardian) { Guardian.new(current_user) }
     let(:channel_id) { channel_1.id }
+    let(:params) { { channel_id: } }
+    let(:dependencies) { { guardian: } }
 
     before { SiteSetting.direct_message_enabled_groups = Group::AUTO_GROUPS[:everyone] }
 
-    let(:params) { { guardian: guardian, channel_id: channel_id } }
-
     context "when all steps pass" do
       context "when category channel" do
         context "with existing membership" do

plugins/chat/spec/services/chat/list_channel_messages_spec.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 RSpec.describe Chat::ListChannelMessages do
-  subject(:result) { described_class.call(params) }
+  subject(:result) { described_class.call(params:, **dependencies) }
 
   fab!(:user)
   fab!(:channel) { Fabricate(:chat_channel) }
@@ -9,7 +9,8 @@ RSpec.describe Chat::ListChannelMessages do
   let(:guardian) { Guardian.new(user) }
   let(:channel_id) { channel.id }
   let(:optional_params) { {} }
-  let(:params) { { guardian: guardian, channel_id: channel_id }.merge(optional_params) }
+  let(:params) { { channel_id: }.merge(optional_params) }
+  let(:dependencies) { { guardian: } }
 
   before { channel.add(user) }
 

plugins/chat/spec/services/chat/list_channel_thread_messages_spec.rb

@@ -1,7 +1,21 @@
 # frozen_string_literal: true
 
 RSpec.describe Chat::ListChannelThreadMessages do
-  subject(:result) { described_class.call(params) }
+  describe described_class::Contract, type: :model do
+    it { is_expected.to validate_presence_of(:thread_id) }
+    it do
+      is_expected.to validate_inclusion_of(:direction).in_array(
+        Chat::MessagesQuery::VALID_DIRECTIONS,
+      ).allow_nil
+    end
+    it do
+      is_expected.to allow_values(Chat::MessagesQuery::MAX_PAGE_SIZE, 1, "1", nil).for(:page_size)
+    end
+    it { is_expected.not_to allow_values(Chat::MessagesQuery::MAX_PAGE_SIZE + 1).for(:page_size) }
+  end
+
+  describe ".call" do
+    subject(:result) { described_class.call(params:, **dependencies) }
 
     fab!(:user)
     fab!(:thread) { Fabricate(:chat_thread, channel: Fabricate(:chat_channel)) }
@@ -9,7 +23,8 @@ RSpec.describe Chat::ListChannelThreadMessages do
     let(:guardian) { Guardian.new(user) }
     let(:thread_id) { thread.id }
     let(:optional_params) { {} }
-  let(:params) { { guardian: guardian, thread_id: thread_id }.merge(optional_params) }
+    let(:params) { { thread_id: }.merge(optional_params) }
+    let(:dependencies) { { guardian: } }
 
     before { thread.channel.add(user) }
 
@@ -166,4 +181,5 @@ RSpec.describe Chat::ListChannelThreadMessages do
         end
       end
     end
+  end
 end

plugins/chat/spec/services/chat/list_user_channels_spec.rb

@@ -1,13 +1,14 @@
 # frozen_string_literal: true
 
 RSpec.describe Chat::ListUserChannels do
-  subject(:result) { described_class.call(params) }
+  subject(:result) { described_class.call(params:, **dependencies) }
 
   fab!(:current_user) { Fabricate(:user) }
   fab!(:channel_1) { Fabricate(:chat_channel) }
 
   let(:guardian) { Guardian.new(current_user) }
-  let(:params) { { guardian: guardian } }
+  let(:params) { {} }
+  let(:dependencies) { { guardian: } }
 
   before { channel_1.add(current_user) }
 

plugins/chat/spec/services/chat/lookup_channel_threads_spec.rb

@@ -11,7 +11,7 @@ RSpec.describe ::Chat::LookupChannelThreads::Contract, type: :model do
 end
 
 RSpec.describe ::Chat::LookupChannelThreads do
-  subject(:result) { described_class.call(params) }
+  subject(:result) { described_class.call(params:, **dependencies) }
 
   fab!(:current_user) { Fabricate(:user) }
 
@@ -19,7 +19,8 @@ RSpec.describe ::Chat::LookupChannelThreads do
   let(:channel_id) { nil }
   let(:limit) { 10 }
   let(:offset) { 0 }
-  let(:params) { { guardian: guardian, channel_id: channel_id, limit: limit, offset: offset } }
+  let(:params) { { channel_id:, limit:, offset: } }
+  let(:dependencies) { { guardian: } }
 
   describe "step - set_limit" do
     fab!(:channel_1) { Fabricate(:chat_channel) }

plugins/chat/spec/services/chat/lookup_thread_spec.rb

@@ -1,13 +1,13 @@
 # frozen_string_literal: true
 
 RSpec.describe Chat::LookupThread do
-  describe Chat::LookupThread::Contract, type: :model do
+  describe described_class::Contract, type: :model do
     it { is_expected.to validate_presence_of :channel_id }
     it { is_expected.to validate_presence_of :thread_id }
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:, **dependencies) }
 
     fab!(:current_user) { Fabricate(:user) }
     fab!(:channel) { Fabricate(:chat_channel, threading_enabled: true) }
@@ -16,7 +16,8 @@ RSpec.describe Chat::LookupThread do
     fab!(:other_thread) { Fabricate(:chat_thread) }
 
     let(:guardian) { Guardian.new(current_user) }
-    let(:params) { { guardian: guardian, thread_id: thread.id, channel_id: thread.channel_id } }
+    let(:params) { { thread_id: thread.id, channel_id: thread.channel_id } }
+    let(:dependencies) { { guardian: } }
 
     context "when all steps pass" do
       it { is_expected.to run_successfully }

plugins/chat/spec/services/chat/lookup_user_threads_spec.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 RSpec.describe ::Chat::LookupUserThreads do
-  subject(:result) { described_class.call(params) }
+  subject(:result) { described_class.call(params:, **dependencies) }
 
   fab!(:current_user) { Fabricate(:user) }
   fab!(:channel_1) { Fabricate(:chat_channel, threading_enabled: true) }
@@ -11,7 +11,8 @@ RSpec.describe ::Chat::LookupUserThreads do
   let(:channel_id) { channel_1.id }
   let(:limit) { 10 }
   let(:offset) { 0 }
-  let(:params) { { guardian: guardian, limit: limit, offset: offset } }
+  let(:params) { { limit:, offset: } }
+  let(:dependencies) { { guardian: } }
 
   before do
     channel_1.add(current_user)

plugins/chat/spec/services/chat/mark_all_user_channels_read_spec.rb

@@ -2,9 +2,10 @@
 
 RSpec.describe Chat::MarkAllUserChannelsRead do
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:, **dependencies) }
 
-    let(:params) { { guardian: guardian } }
+    let(:params) { {} }
+    let(:dependencies) { { guardian: } }
     let(:guardian) { Guardian.new(current_user) }
 
     fab!(:current_user) { Fabricate(:user) }

plugins/chat/spec/services/chat/mark_thread_title_prompt_seen_spec.rb

@@ -1,13 +1,13 @@
 # frozen_string_literal: true
 
 RSpec.describe Chat::MarkThreadTitlePromptSeen do
-  describe Chat::MarkThreadTitlePromptSeen::Contract, type: :model do
+  describe described_class::Contract, type: :model do
     it { is_expected.to validate_presence_of :channel_id }
     it { is_expected.to validate_presence_of :thread_id }
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:, **dependencies) }
 
     fab!(:current_user) { Fabricate(:user) }
     fab!(:channel) { Fabricate(:chat_channel, threading_enabled: true) }
@@ -18,7 +18,8 @@ RSpec.describe Chat::MarkThreadTitlePromptSeen do
     fab!(:last_reply) { Fabricate(:chat_message, thread: thread, chat_channel: channel) }
 
     let(:guardian) { Guardian.new(current_user) }
-    let(:params) { { guardian: guardian, thread_id: thread.id, channel_id: thread.channel_id } }
+    let(:params) { { thread_id: thread.id, channel_id: thread.channel_id } }
+    let(:dependencies) { { guardian: } }
 
     before { thread.update!(last_message: last_reply) }
 

plugins/chat/spec/services/chat/restore_message_spec.rb

@@ -13,18 +13,18 @@ RSpec.describe Chat::RestoreMessage do
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:, **dependencies) }
+
+    let(:dependencies) { { guardian: } }
 
     context "when params are not valid" do
-      let(:params) { { guardian: guardian } }
+      let(:params) { {} }
 
       it { is_expected.to fail_a_contract }
     end
 
     context "when params are valid" do
-      let(:params) do
-        { guardian: guardian, message_id: message.id, channel_id: message.chat_channel_id }
-      end
+      let(:params) { { message_id: message.id, channel_id: message.chat_channel_id } }
 
       context "when the user does not have permission to restore" do
         before { message.update!(user: Fabricate(:admin)) }
@@ -33,9 +33,7 @@ RSpec.describe Chat::RestoreMessage do
       end
 
       context "when the channel does not match the message" do
-        let(:params) do
-          { guardian: guardian, message_id: message.id, channel_id: Fabricate(:chat_channel).id }
-        end
+        let(:params) { { message_id: message.id, channel_id: Fabricate(:chat_channel).id } }
 
         it { is_expected.to fail_to_find_a_model(:message) }
       end

plugins/chat/spec/services/chat/search_chatable_spec.rb

@@ -2,7 +2,7 @@
 
 RSpec.describe Chat::SearchChatable do
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:, **dependencies) }
 
     fab!(:current_user) { Fabricate(:user, username: "bob-user") }
     fab!(:sam) { Fabricate(:user, username: "sam-user") }
@@ -25,15 +25,15 @@ RSpec.describe Chat::SearchChatable do
     let(:excluded_memberships_channel_id) { nil }
     let(:params) do
       {
-        guardian: guardian,
-        term: term,
-        include_users: include_users,
-        include_groups: include_groups,
-        include_category_channels: include_category_channels,
-        include_direct_message_channels: include_direct_message_channels,
-        excluded_memberships_channel_id: excluded_memberships_channel_id,
+        term:,
+        include_users:,
+        include_groups:,
+        include_category_channels:,
+        include_direct_message_channels:,
+        excluded_memberships_channel_id:,
       }
     end
+    let(:dependencies) { { guardian: } }
 
     before do
       SiteSetting.direct_message_enabled_groups = Group::AUTO_GROUPS[:everyone]

plugins/chat/spec/services/chat/stop_message_streaming_spec.rb

@@ -6,10 +6,11 @@ RSpec.describe Chat::StopMessageStreaming do
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:, **dependencies) }
 
     let(:guardian) { Guardian.new(current_user) }
-    let(:params) { { guardian: guardian, message_id: message_1.id } }
+    let(:params) { { message_id: message_1.id } }
+    let(:dependencies) { { guardian: guardian } }
 
     fab!(:current_user) { Fabricate(:user) }
     fab!(:channel_1) { Fabricate(:chat_channel) }

plugins/chat/spec/services/chat/tracking_state_spec.rb

@@ -2,7 +2,7 @@
 
 RSpec.describe ::Chat::TrackingState do
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:, **dependencies) }
 
     fab!(:current_user) { Fabricate(:user) }
     fab!(:channel_1) { Fabricate(:chat_channel, threading_enabled: true) }
@@ -17,12 +17,8 @@ RSpec.describe ::Chat::TrackingState do
     let(:include_threads) { true }
     let(:include_missing_memberships) { nil }
 
-    let(:params) do
-      id_params.merge(guardian: guardian).merge(
-        include_threads: include_threads,
-        include_missing_memberships: include_missing_memberships,
-      )
-    end
+    let(:params) { id_params.merge(include_threads:, include_missing_memberships:) }
+    let(:dependencies) { { guardian: } }
 
     fab!(:channel_1_membership) do
       Fabricate(:user_chat_channel_membership, chat_channel: channel_1, user: current_user)

plugins/chat/spec/services/chat/trash_channel_spec.rb

@@ -1,30 +1,30 @@
 # frozen_string_literal: true
 
-RSpec.describe(Chat::TrashChannel) do
-  subject(:result) { described_class.call(guardian: guardian) }
+RSpec.describe Chat::TrashChannel do
+  subject(:result) { described_class.call(params:, **dependencies) }
 
+  fab!(:current_user) { Fabricate(:admin) }
+  fab!(:channel) { Fabricate(:chat_channel) }
+
+  let(:params) { { channel_id: } }
+  let(:dependencies) { { guardian: } }
   let(:guardian) { Guardian.new(current_user) }
+  let(:channel_id) { channel.id }
 
   context "when channel_id is not provided" do
-    fab!(:current_user) { Fabricate(:admin) }
+    let(:channel_id) { nil }
 
     it { is_expected.to fail_to_find_a_model(:channel) }
   end
 
   context "when channel_id is provided" do
-    subject(:result) { described_class.call(channel_id: channel.id, guardian: guardian) }
-
-    fab!(:channel) { Fabricate(:chat_channel) }
-
     context "when user is not allowed to perform the action" do
-      fab!(:current_user) { Fabricate(:user) }
+      let!(:current_user) { Fabricate(:user) }
 
       it { is_expected.to fail_a_policy(:invalid_access) }
     end
 
     context "when user is allowed to perform the action" do
-      fab!(:current_user) { Fabricate(:admin) }
-
       it { is_expected.to run_successfully }
 
       it "trashes the channel" do

plugins/chat/spec/services/chat/trash_message_spec.rb

@@ -7,7 +7,7 @@ RSpec.describe Chat::TrashMessage do
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(**params, **dependencies) }
+    subject(:result) { described_class.call(params:, **dependencies) }
 
     fab!(:current_user) { Fabricate(:user) }
     fab!(:message) { Fabricate(:chat_message, user: current_user) }

plugins/chat/spec/services/chat/trash_messages_spec.rb

@@ -8,7 +8,7 @@ RSpec.describe Chat::TrashMessages do
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(**params, **dependencies) }
+    subject(:result) { described_class.call(params:, **dependencies) }
 
     fab!(:current_user) { Fabricate(:user) }
     fab!(:chat_channel) { Fabricate(:chat_channel) }

plugins/chat/spec/services/chat/unfollow_channel_spec.rb

@@ -8,27 +8,27 @@ RSpec.describe Chat::UnfollowChannel do
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:, **dependencies) }
 
     fab!(:channel_1) { Fabricate(:chat_channel) }
     fab!(:current_user) { Fabricate(:user) }
 
+    let(:params) { { channel_id: } }
+    let(:dependencies) { { guardian: } }
     let(:guardian) { Guardian.new(current_user) }
     let(:channel_id) { channel_1.id }
 
     before { SiteSetting.direct_message_enabled_groups = Group::AUTO_GROUPS[:everyone] }
 
-    let(:params) { { guardian: guardian, channel_id: channel_id } }
-
     context "when all steps pass" do
       context "with existing membership" do
+        let(:membership) { channel_1.membership_for(current_user) }
+
         before { channel_1.add(current_user) }
 
         it { is_expected.to run_successfully }
 
         it "unfollows the channel" do
-          membership = channel_1.membership_for(current_user)
-
           expect { result }.to change { membership.reload.following }.from(true).to(false)
         end
       end
@@ -43,7 +43,7 @@ RSpec.describe Chat::UnfollowChannel do
     end
 
     context "when channel is not found" do
-      before { params[:channel_id] = -999 }
+      let(:channel_id) { -999 }
 
       it { is_expected.to fail_to_find_a_model(:channel) }
     end

plugins/chat/spec/services/chat/update_channel_spec.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 RSpec.describe Chat::UpdateChannel do
-  subject(:result) { described_class.call(guardian: guardian, channel_id: channel.id, **params) }
+  subject(:result) { described_class.call(params:, **dependencies) }
 
   fab!(:channel) { Fabricate(:chat_channel) }
   fab!(:current_user) { Fabricate(:admin) }
@@ -9,6 +9,7 @@ RSpec.describe Chat::UpdateChannel do
   let(:guardian) { Guardian.new(current_user) }
   let(:params) do
     {
+      channel_id: channel.id,
       name: "cool channel",
       description: "a channel description",
       slug: "snail",
@@ -16,6 +17,7 @@ RSpec.describe Chat::UpdateChannel do
       auto_join_users: false,
     }
   end
+  let(:dependencies) { { guardian: } }
 
   context "when the user cannot edit the channel" do
     fab!(:current_user) { Fabricate(:user) }

plugins/chat/spec/services/chat/update_channel_status_spec.rb

@@ -8,7 +8,7 @@ RSpec.describe(Chat::UpdateChannelStatus) do
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(**params, **dependencies) }
+    subject(:result) { described_class.call(params:, **dependencies) }
 
     fab!(:channel) { Fabricate(:chat_channel) }
     fab!(:current_user) { Fabricate(:admin) }

plugins/chat/spec/services/chat/update_message_spec.rb

@@ -64,7 +64,13 @@ RSpec.describe Chat::UpdateMessage do
       new_message = "2 short"
 
       expect do
-        described_class.call(guardian: guardian, message_id: chat_message.id, message: new_message)
+        described_class.call(
+          guardian: guardian,
+          params: {
+            message_id: chat_message.id,
+            message: new_message,
+          },
+        )
       end.to raise_error(ActiveRecord::RecordInvalid).with_message(
         "Validation failed: " +
           I18n.t(
@@ -83,7 +89,13 @@ RSpec.describe Chat::UpdateMessage do
       new_message = "2 long" * 100
 
       expect do
-        described_class.call(guardian: guardian, message_id: chat_message.id, message: new_message)
+        described_class.call(
+          guardian: guardian,
+          params: {
+            message_id: chat_message.id,
+            message: new_message,
+          },
+        )
       end.to raise_error(ActiveRecord::RecordInvalid).with_message(
         "Validation failed: " +
           I18n.t(
@@ -95,46 +107,17 @@ RSpec.describe Chat::UpdateMessage do
       expect(chat_message.reload.message).to eq(og_message)
     end
 
-    it "errors when a blank message is sent" do
-      og_message = "This won't be changed!"
-      chat_message = create_chat_message(user1, og_message, public_chat_channel)
-      new_message = "    "
-
-      updater =
-        described_class.call(guardian: guardian, message_id: chat_message.id, message: new_message)
-
-      expect(updater.contract).not_to be_valid
-      expect(updater.contract.errors.added?(:message, :blank)).to be_truthy
-      expect(chat_message.reload.message).to eq(og_message)
-    end
-
-    it "errors if a user other than the message user is trying to edit the message" do
-      og_message = "This won't be changed!"
-      chat_message = create_chat_message(user1, og_message, public_chat_channel)
-      new_message = "2 short"
-      updater =
-        described_class.call(
-          guardian: Guardian.new(Fabricate(:user)),
-          message_id: chat_message.id,
-          message: new_message,
-        )
-
-      expect(updater.message.reload.message).not_to eq(new_message)
-    end
-
-    it "updates a message's content" do
-      chat_message = create_chat_message(user1, "This will be changed", public_chat_channel)
-      new_message = "Change to this!"
-
-      described_class.call(guardian: guardian, message_id: chat_message.id, message: new_message)
-      expect(chat_message.reload.message).to eq(new_message)
-    end
-
     it "cleans message's content" do
       chat_message = create_chat_message(user1, "This will be changed", public_chat_channel)
       new_message = "bbbbb\n"
 
-      described_class.call(guardian: guardian, message_id: chat_message.id, message: new_message)
+      described_class.call(
+        guardian: guardian,
+        params: {
+          message_id: chat_message.id,
+          message: new_message,
+        },
+      )
       expect(chat_message.reload.message).to eq("bbbbb")
     end
 
@@ -145,9 +128,13 @@ RSpec.describe Chat::UpdateMessage do
 
         described_class.call(
           guardian: guardian,
+          options: {
+            strip_whitespaces: false,
+          },
+          params: {
             message_id: chat_message.id,
             message: new_message,
-          strip_whitespaces: false,
+          },
         )
         expect(chat_message.reload.message).to eq("bbbbb\n")
       end
@@ -157,7 +144,13 @@ RSpec.describe Chat::UpdateMessage do
       chat_message = create_chat_message(user1, "This will be changed", public_chat_channel)
       new_message = "Change **to** this!"
 
-      described_class.call(guardian: guardian, message_id: chat_message.id, message: new_message)
+      described_class.call(
+        guardian: guardian,
+        params: {
+          message_id: chat_message.id,
+          message: new_message,
+        },
+      )
       expect(chat_message.reload.cooked).to eq("<p>Change <strong>to</strong> this!</p>")
     end
 
@@ -166,8 +159,10 @@ RSpec.describe Chat::UpdateMessage do
 
       described_class.call(
         guardian: guardian,
+        params: {
           message_id: chat_message.id,
           message: "Change to this!",
+        },
       )
       expect(chat_message.reload.excerpt).to eq("Change to this!")
     end
@@ -178,8 +173,10 @@ RSpec.describe Chat::UpdateMessage do
         DiscourseEvent.track_events do
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message.id,
               message: "Change to this!",
+            },
           )
         end
       expect(events.map { _1[:event_name] }).to include(:chat_message_edited)
@@ -194,8 +191,10 @@ RSpec.describe Chat::UpdateMessage do
           .track_publish("/chat/#{public_chat_channel.id}") do
             described_class.call(
               guardian: guardian,
+              params: {
                 message_id: chat_message.id,
                 message: new_content,
+              },
             )
           end
           .detect { |m| m.data["type"] == "edit" }
@@ -210,8 +209,10 @@ RSpec.describe Chat::UpdateMessage do
 
         described_class.call(
           guardian: guardian,
+          params: {
             message_id: message.id,
             message: "Mentioning @#{user2.username} and @#{user3.username}",
+          },
         )
 
         mention = user3.chat_mentions.where(chat_message: message.id).first
@@ -224,8 +225,10 @@ RSpec.describe Chat::UpdateMessage do
         expect {
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message.id,
               message: message + " editedddd",
+            },
           )
         }.not_to change { Chat::Mention.count }
       end
@@ -236,8 +239,10 @@ RSpec.describe Chat::UpdateMessage do
 
         described_class.call(
           guardian: guardian,
+          params: {
             message_id: chat_message.id,
             message: message + " @#{user_without_memberships.username}",
+          },
         )
 
         mention = user_without_memberships.chat_mentions.where(chat_message: chat_message).first
@@ -254,8 +259,10 @@ RSpec.describe Chat::UpdateMessage do
         expect {
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message.id,
               message: "ping @#{user3.username}",
+            },
           )
         }.to change { user2.chat_mentions.count }.by(-1).and not_change {
                 user3.chat_mentions.count
@@ -271,8 +278,10 @@ RSpec.describe Chat::UpdateMessage do
           )
         described_class.call(
           guardian: guardian,
+          params: {
             message_id: chat_message.id,
             message: "ping @#{user3.username} @#{user4.username}",
+          },
         )
 
         expect(user2.chat_mentions.where(chat_message: chat_message)).not_to be_present
@@ -284,7 +293,9 @@ RSpec.describe Chat::UpdateMessage do
         result =
           Chat::CreateDirectMessageChannel.call(
             guardian: user1.guardian,
+            params: {
               target_usernames: [user1.username, user2.username],
+            },
           )
         service_failed!(result) if result.failure?
         direct_message_channel = result.channel
@@ -292,8 +303,10 @@ RSpec.describe Chat::UpdateMessage do
 
         described_class.call(
           guardian: guardian,
+          params: {
             message_id: message.id,
             message: "ping @#{admin1.username}",
+          },
         )
 
         mention = admin1.chat_mentions.where(chat_message_id: message.id).first
@@ -304,7 +317,13 @@ RSpec.describe Chat::UpdateMessage do
         chat_message = create_chat_message(user1, "I will mention myself soon", public_chat_channel)
         new_content = "hello @#{user1.username}"
 
-        described_class.call(guardian: guardian, message_id: chat_message.id, message: new_content)
+        described_class.call(
+          guardian: guardian,
+          params: {
+            message_id: chat_message.id,
+            message: new_content,
+          },
+        )
 
         mention = user1.chat_mentions.where(chat_message: chat_message).first
         expect(mention).to be_present
@@ -323,8 +342,10 @@ RSpec.describe Chat::UpdateMessage do
             .track_publish("/chat/#{public_chat_channel.id}") do
               described_class.call(
                 guardian: guardian,
+                params: {
                   message_id: chat_message.id,
                   message: new_content,
+                },
               )
             end
             .detect { |m| m.data["type"] == "processed" }
@@ -349,8 +370,10 @@ RSpec.describe Chat::UpdateMessage do
             .track_publish("/chat/#{public_chat_channel.id}") do
               described_class.call(
                 guardian: guardian,
+                params: {
                   message_id: chat_message.id,
                   message: "Hey @#{user2.username}",
+                },
               )
             end
             .detect { |m| m.data["type"] == "processed" }
@@ -368,8 +391,10 @@ RSpec.describe Chat::UpdateMessage do
 
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message.id,
               message: "ping @#{user3.username}",
+            },
           )
 
           user2_mentions = user2.chat_mentions.where(chat_message: chat_message)
@@ -386,8 +411,10 @@ RSpec.describe Chat::UpdateMessage do
 
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message.id,
               message: "ping @#{user2.username} @#{user2.username} edited",
+            },
           )
 
           expect(user2.chat_mentions.where(chat_message: chat_message).count).to eq(1)
@@ -415,8 +442,10 @@ RSpec.describe Chat::UpdateMessage do
 
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message.id,
               message: "ping @#{group_1.name}",
+            },
           )
 
           expect(group_1.chat_mentions.where(chat_message: chat_message).count).to be(1)
@@ -429,8 +458,10 @@ RSpec.describe Chat::UpdateMessage do
 
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message.id,
               message: "ping @#{group_2.name}",
+            },
           )
 
           expect(chat_message.reload.group_mentions.map(&:target_id)).to contain_exactly(group_2.id)
@@ -441,8 +472,10 @@ RSpec.describe Chat::UpdateMessage do
 
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message.id,
               message: "ping nobody anymore!",
+            },
           )
 
           expect(group_1.chat_mentions.where(chat_message: chat_message).count).to be(0)
@@ -465,8 +498,10 @@ RSpec.describe Chat::UpdateMessage do
 
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message.id,
               message: "Update the message and still mention the same group @#{group.name}",
+            },
           )
 
           expect(group_user.notifications.count).to be(1) # no new notifications has been created
@@ -486,8 +521,10 @@ RSpec.describe Chat::UpdateMessage do
 
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message.id,
               message: "Update the message and still mention @here",
+            },
           )
 
           expect(user.notifications.count).to be(1) # no new notifications have been created
@@ -505,8 +542,10 @@ RSpec.describe Chat::UpdateMessage do
 
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message.id,
               message: "Update the message and still mention @all",
+            },
           )
 
           expect(user.notifications.count).to be(1) # no new notifications have been created
@@ -522,7 +561,13 @@ RSpec.describe Chat::UpdateMessage do
       old_message = "It's a thrsday!"
       new_message = "Today is Thursday, it's almost the weekend already!"
       chat_message = create_chat_message(user1, old_message, public_chat_channel)
-      described_class.call(guardian: guardian, message_id: chat_message.id, message: new_message)
+      described_class.call(
+        guardian: guardian,
+        params: {
+          message_id: chat_message.id,
+          message: new_message,
+        },
+      )
 
       revision = chat_message.revisions.last
       expect(revision.old_message).to eq(old_message)
@@ -556,8 +601,10 @@ RSpec.describe Chat::UpdateMessage do
         expect do
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message_1.id,
               message: "another different chat message here",
+            },
           )
         end.to raise_error(ActiveRecord::RecordInvalid).with_message(
           "Validation failed: " + I18n.t("chat.errors.duplicate_message"),
@@ -577,9 +624,11 @@ RSpec.describe Chat::UpdateMessage do
         updater =
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message.id,
               message: "this is some chat message",
               upload_ids: [upload2.id],
+            },
           )
         expect(updater.message).to be_valid
         expect(chat_message.reload.uploads.count).to eq(1)
@@ -601,9 +650,11 @@ RSpec.describe Chat::UpdateMessage do
         expect {
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message.id,
               message: "I guess this is different",
               upload_ids: [upload2.id, upload1.id],
+            },
           )
         }.to not_change { UploadReference.count }
       end
@@ -620,9 +671,11 @@ RSpec.describe Chat::UpdateMessage do
         expect {
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message.id,
               message: "I guess this is different",
               upload_ids: [upload1.id],
+            },
           )
         }.to change { UploadReference.where(upload_id: upload2.id).count }.by(-1)
       end
@@ -639,9 +692,11 @@ RSpec.describe Chat::UpdateMessage do
         expect {
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message.id,
               message: "I guess this is different",
               upload_ids: [],
+            },
           )
         }.to change { UploadReference.where(target: chat_message).count }.by(-2)
       end
@@ -651,9 +706,11 @@ RSpec.describe Chat::UpdateMessage do
         expect {
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message.id,
               message: "I guess this is different",
               upload_ids: [upload1.id],
+            },
           )
         }.to change { UploadReference.where(target: chat_message).count }.by(1)
       end
@@ -663,9 +720,11 @@ RSpec.describe Chat::UpdateMessage do
         expect {
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message.id,
               message: "I guess this is different",
               upload_ids: [upload1.id, upload2.id],
+            },
           )
         }.to change { UploadReference.where(target: chat_message).count }.by(2)
       end
@@ -676,9 +735,11 @@ RSpec.describe Chat::UpdateMessage do
         expect {
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message,
               message: "I guess this is different",
               upload_ids: [0],
+            },
           )
         }.to not_change { UploadReference.where(target: chat_message).count }
       end
@@ -689,9 +750,11 @@ RSpec.describe Chat::UpdateMessage do
         expect {
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message.id,
               message: "I guess this is different",
               upload_ids: [upload1.id, upload2.id],
+            },
           )
         }.to not_change { UploadReference.where(target: chat_message).count }
       end
@@ -708,9 +771,11 @@ RSpec.describe Chat::UpdateMessage do
         expect {
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message.id,
               message: "I guess this is different",
               upload_ids: [],
+            },
           )
         }.to not_change { UploadReference.where(target: chat_message).count }
       end
@@ -727,9 +792,11 @@ RSpec.describe Chat::UpdateMessage do
         new_message = "hi :)"
         described_class.call(
           guardian: guardian,
+          params: {
             message_id: chat_message.id,
             message: new_message,
             upload_ids: [upload1.id],
+          },
         )
         expect(chat_message.reload.message).to eq(new_message)
       end
@@ -750,8 +817,10 @@ RSpec.describe Chat::UpdateMessage do
           MessageBus.track_publish("/chat/#{public_chat_channel.id}") do
             described_class.call(
               guardian: guardian,
+              params: {
                 message_id: message.id,
                 message: "some new updated content",
+              },
             )
           end
         expect(
@@ -773,8 +842,10 @@ RSpec.describe Chat::UpdateMessage do
         expect do
           described_class.call(
             guardian: guardian,
+            params: {
               message_id: chat_message.id,
               message: "bad word - #{watched_word.word}",
+            },
           )
         end.to raise_error(ActiveRecord::RecordInvalid).with_message(msg)
 
@@ -786,8 +857,10 @@ RSpec.describe Chat::UpdateMessage do
 
         described_class.call(
           guardian: guardian,
+          params: {
             message_id: chat_message.id,
             message: "bad word - #{censored_word.word}",
+          },
         )
 
         expect(chat_message.reload.excerpt).to eq("bad word - ■■■■")
@@ -801,8 +874,10 @@ RSpec.describe Chat::UpdateMessage do
         message.update!(user: user)
         described_class.call(
           guardian: Guardian.new(user),
+          params: {
             message_id: message.id,
             message: "I guess this is different",
+          },
         )
       end
 
@@ -810,7 +885,7 @@ RSpec.describe Chat::UpdateMessage do
         before { public_chat_channel.update(status: :closed) }
 
         it "errors when trying to update the message for non-staff" do
-          updater = update_message(user1)
+          update_message(user1)
           expect(message.reload.message).not_to eq("I guess this is different")
         end
 
@@ -824,10 +899,10 @@ RSpec.describe Chat::UpdateMessage do
         before { public_chat_channel.update(status: :read_only) }
 
         it "errors when trying to update the message for all users" do
-          updater = update_message(user1)
+          update_message(user1)
           expect(message.reload.message).not_to eq("I guess this is different")
 
-          updater = update_message(admin1)
+          update_message(admin1)
           expect(message.reload.message).not_to eq("I guess this is different")
         end
       end
@@ -836,10 +911,10 @@ RSpec.describe Chat::UpdateMessage do
         before { public_chat_channel.update(status: :archived) }
 
         it "errors when trying to update the message for all users" do
-          updater = update_message(user1)
+          update_message(user1)
           expect(message.reload.message).not_to eq("I guess this is different")
 
-          updater = update_message(admin1)
+          update_message(admin1)
           expect(message.reload.message).not_to eq("I guess this is different")
         end
       end
@@ -847,7 +922,7 @@ RSpec.describe Chat::UpdateMessage do
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:, options:, **dependencies) }
 
     fab!(:current_user) { Fabricate(:user) }
     fab!(:channel_1) { Fabricate(:chat_channel) }
@@ -866,9 +941,9 @@ RSpec.describe Chat::UpdateMessage do
     let(:message) { "new" }
     let(:message_id) { message_1.id }
     let(:upload_ids) { [upload_1.id] }
-    let(:params) do
-      { guardian: guardian, message_id: message_id, message: message, upload_ids: upload_ids }
-    end
+    let(:params) { { message_id: message_id, message: message, upload_ids: upload_ids } }
+    let(:dependencies) { { guardian: guardian } }
+    let(:options) { {} }
 
     before do
       SiteSetting.chat_editing_grace_period = 30
@@ -905,12 +980,12 @@ RSpec.describe Chat::UpdateMessage do
       end
 
       it "can enqueue a job to process message" do
-        params[:process_inline] = false
+        options[:process_inline] = false
         expect_enqueued_with(job: Jobs::Chat::ProcessMessage) { result }
       end
 
       it "can process a message inline" do
-        params[:process_inline] = true
+        options[:process_inline] = true
         Jobs::Chat::ProcessMessage.any_instance.expects(:execute).once
         expect_not_enqueued_with(job: Jobs::Chat::ProcessMessage) { result }
       end

plugins/chat/spec/services/chat/update_thread_notification_settings_spec.rb

@@ -11,7 +11,7 @@ RSpec.describe Chat::UpdateThreadNotificationSettings do
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:, **dependencies) }
 
     fab!(:current_user) { Fabricate(:user) }
     fab!(:channel) { Fabricate(:chat_channel, threading_enabled: true) }
@@ -22,12 +22,12 @@ RSpec.describe Chat::UpdateThreadNotificationSettings do
     let(:guardian) { Guardian.new(current_user) }
     let(:params) do
       {
-        guardian: guardian,
         thread_id: thread.id,
         channel_id: thread.channel_id,
         notification_level: Chat::UserChatThreadMembership.notification_levels[:normal],
       }
     end
+    let(:dependencies) { { guardian: } }
 
     before { thread.update!(last_message: last_reply) }
 

plugins/chat/spec/services/chat/update_thread_spec.rb

@@ -7,7 +7,7 @@ RSpec.describe Chat::UpdateThread do
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:, **dependencies) }
 
     fab!(:current_user) { Fabricate(:user) }
     fab!(:channel) { Fabricate(:chat_channel, threading_enabled: true) }
@@ -17,7 +17,8 @@ RSpec.describe Chat::UpdateThread do
 
     let(:guardian) { Guardian.new(current_user) }
     let(:title) { "some new title :D" }
-    let(:params) { { guardian: guardian, thread_id: thread.id, title: title } }
+    let(:params) { { thread_id: thread.id, title: } }
+    let(:dependencies) { { guardian: } }
 
     context "when all steps pass" do
       it { is_expected.to run_successfully }

plugins/chat/spec/services/chat/update_user_channel_last_read_spec.rb

@@ -1,13 +1,13 @@
 # frozen_string_literal: true
 
 RSpec.describe Chat::UpdateUserChannelLastRead do
-  describe Chat::UpdateUserChannelLastRead::Contract, type: :model do
+  describe described_class::Contract, type: :model do
     it { is_expected.to validate_presence_of :channel_id }
     it { is_expected.to validate_presence_of :message_id }
   end
 
   describe ".call" do
-    subject(:result) { described_class.call(params) }
+    subject(:result) { described_class.call(params:, **dependencies) }
 
     fab!(:chatters) { Fabricate(:group) }
     fab!(:current_user) { Fabricate(:user, group_ids: [chatters.id]) }
@@ -18,7 +18,8 @@ RSpec.describe Chat::UpdateUserChannelLastRead do
     let(:message_1) { Fabricate(:chat_message, chat_channel: membership.chat_channel) }
 
     let(:guardian) { Guardian.new(current_user) }
-    let(:params) { { guardian: guardian, channel_id: channel.id, message_id: message_1.id } }
+    let(:params) { { channel_id: channel.id, message_id: message_1.id } }
+    let(:dependencies) { { guardian: } }
 
     before { SiteSetting.chat_allowed_groups = chatters }