FEATURE: add custom fields to chat (channel/message/thread) (#29504)

This allows various extensions to store extra information the 3 most popular
chat entities

Useful for certain plugins and migrations

plugins/chat/app/models/chat/channel.rb

@@ -4,6 +4,7 @@ module Chat
   class Channel < ActiveRecord::Base
     include Trashable
     include TypeMappable
+    include HasCustomFields
 
     # TODO (martin) Remove once we are using last_message instead,
     # should be around August 2023.

plugins/chat/app/models/chat/channel_custom_field.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+module Chat
+  class ChannelCustomField < ActiveRecord::Base
+    belongs_to :channel
+  end
+end
+
+# == Schema Information
+#
+# Table name: chat_channel_custom_fields
+#
+#  id         :bigint           not null, primary key
+#  channel_id :bigint           not null
+#  name       :string(256)      not null
+#  value      :string(1000000)
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#
+# Indexes
+#
+#  index_chat_channel_custom_fields_on_channel_id_and_name  (channel_id,name) UNIQUE
+#

plugins/chat/app/models/chat/message.rb

@@ -4,6 +4,7 @@ module Chat
   class Message < ActiveRecord::Base
     include Trashable
     include TypeMappable
+    include HasCustomFields
 
     self.table_name = "chat_messages"
 

plugins/chat/app/models/chat/message_custom_field.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+module Chat
+  class MessageCustomField < ActiveRecord::Base
+    belongs_to :message
+  end
+end
+
+# == Schema Information
+#
+# Table name: chat_message_custom_fields
+#
+#  id         :bigint           not null, primary key
+#  message_id :bigint           not null
+#  name       :string(256)      not null
+#  value      :string(1000000)
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#
+# Indexes
+#
+#  index_chat_message_custom_fields_on_message_id_and_name  (message_id,name) UNIQUE
+#

plugins/chat/app/models/chat/thread.rb

@@ -5,6 +5,7 @@ module Chat
     MAX_TITLE_LENGTH = 100
 
     include Chat::ThreadCache
+    include HasCustomFields
 
     self.table_name = "chat_threads"
 

plugins/chat/app/models/chat/thread_custom_field.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+module Chat
+  class ThreadCustomField < ActiveRecord::Base
+    belongs_to :thread
+  end
+end
+
+# == Schema Information
+#
+# Table name: chat_thread_custom_fields
+#
+#  id         :bigint           not null, primary key
+#  thread_id  :bigint           not null
+#  name       :string(256)      not null
+#  value      :string(1000000)
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#
+# Indexes
+#
+#  index_chat_thread_custom_fields_on_thread_id_and_name  (thread_id,name) UNIQUE
+#

plugins/chat/db/migrate/20241031050638_add_custom_fields_to_chat.rb

@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+class AddCustomFieldsToChat < ActiveRecord::Migration[7.1]
+  def change
+    create_table :chat_thread_custom_fields do |t|
+      t.bigint :thread_id, null: false
+      t.string :name, limit: 256, null: false
+      t.string :value, limit: 1_000_000
+      t.timestamps null: false
+    end
+
+    create_table :chat_message_custom_fields do |t|
+      t.bigint :message_id, null: false
+      t.string :name, limit: 256, null: false
+      t.string :value, limit: 1_000_000
+      t.timestamps null: false
+    end
+
+    create_table :chat_channel_custom_fields do |t|
+      t.bigint :channel_id, null: false
+      t.string :name, limit: 256, null: false
+      t.string :value, limit: 1_000_000
+      t.timestamps null: false
+    end
+
+    add_index :chat_thread_custom_fields, %i[thread_id name], unique: true
+    add_index :chat_message_custom_fields, %i[message_id name], unique: true
+    add_index :chat_channel_custom_fields, %i[channel_id name], unique: true
+  end
+end

plugins/chat/spec/models/chat/channel_spec.rb

@@ -11,6 +11,14 @@ RSpec.describe Chat::Channel do
   it { is_expected.to validate_length_of(:chatable_type).is_at_most(100) }
   it { is_expected.to validate_length_of(:type).is_at_most(100) }
 
+  it "supports custom fields" do
+    channel.custom_fields["test"] = "test"
+    channel.save_custom_fields
+    loaded_channel = Chat::Channel.find(channel.id)
+    expect(loaded_channel.custom_fields["test"]).to eq("test")
+    expect(Chat::ChannelCustomField.first.channel.id).to eq(channel.id)
+  end
+
   describe ".last_message" do
     context "when there are no last message" do
       it "returns an instance of NullMessage" do

plugins/chat/spec/models/chat/message_spec.rb

@@ -5,6 +5,14 @@ describe Chat::Message do
 
   it { is_expected.to have_many(:chat_mentions).dependent(:destroy) }
 
+  it "supports custom fields" do
+    message.custom_fields["test"] = "test"
+    message.save_custom_fields
+    loaded_message = Chat::Message.find(message.id)
+    expect(loaded_message.custom_fields["test"]).to eq("test")
+    expect(Chat::MessageCustomField.first.message.id).to eq(message.id)
+  end
+
   describe "validations" do
     subject(:message) { described_class.new(message: "") }
 
@@ -509,7 +517,7 @@ describe Chat::Message do
     it "destroys upload_references" do
       message_1 = Fabricate(:chat_message)
       upload_reference_1 = Fabricate(:upload_reference, target: message_1)
-      upload_1 = Fabricate(:upload)
+      _upload_1 = Fabricate(:upload)
 
       message_1.destroy!
 

plugins/chat/spec/models/chat/thread_spec.rb

@@ -9,18 +9,16 @@ RSpec.describe Chat::Thread do
     fab!(:thread_2) { Fabricate(:chat_thread, channel: channel) }
     fab!(:thread_3) { Fabricate(:chat_thread, channel: channel) }
 
-    before do
+    fab!(:thread_1_message_1) { Fabricate(:chat_message, chat_channel: channel, thread: thread_1) }
-      Fabricate(:chat_message, chat_channel: channel, thread: thread_1)
+    fab!(:thread_1_message_2) { Fabricate(:chat_message, chat_channel: channel, thread: thread_1) }
-      Fabricate(:chat_message, chat_channel: channel, thread: thread_1)
+    fab!(:thread_1_message_3) { Fabricate(:chat_message, chat_channel: channel, thread: thread_1) }
-      Fabricate(:chat_message, chat_channel: channel, thread: thread_1)
 
-      Fabricate(:chat_message, chat_channel: channel, thread: thread_2)
+    fab!(:thread_2_message_1) { Fabricate(:chat_message, chat_channel: channel, thread: thread_2) }
-      Fabricate(:chat_message, chat_channel: channel, thread: thread_2)
+    fab!(:thread_2_message_2) { Fabricate(:chat_message, chat_channel: channel, thread: thread_2) }
-      Fabricate(:chat_message, chat_channel: channel, thread: thread_2)
+    fab!(:thread_2_message_3) { Fabricate(:chat_message, chat_channel: channel, thread: thread_2) }
-      Fabricate(:chat_message, chat_channel: channel, thread: thread_2)
+    fab!(:thread_2_message_4) { Fabricate(:chat_message, chat_channel: channel, thread: thread_2) }
 
-      Fabricate(:chat_message, chat_channel: channel, thread: thread_3)
+    fab!(:thread_3_message_1) { Fabricate(:chat_message, chat_channel: channel, thread: thread_3) }
-    end
 
     describe "updating replies_count for all threads" do
       it "counts correctly and does not include the original message" do
@@ -233,4 +231,17 @@ RSpec.describe Chat::Thread do
       expect(thread.latest_not_deleted_message_id).to eq(old_message.id)
     end
   end
+
+  describe "custom fields" do
+    fab!(:channel) { Fabricate(:category_channel) }
+    fab!(:thread) { Fabricate(:chat_thread, channel: channel) }
+
+    it "allows create and save" do
+      thread.custom_fields["test"] = "test"
+      thread.save_custom_fields
+      loaded_thread = Chat::Thread.find(thread.id)
+      expect(loaded_thread.custom_fields["test"]).to eq("test")
+      expect(Chat::ThreadCustomField.first.thread.id).to eq(thread.id)
+    end
+  end
 end