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407 lines
14 KiB
Ruby
407 lines
14 KiB
Ruby
require_dependency 'rate_limiter'
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require_dependency 'system_message'
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require_dependency 'trashable'
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class PostAction < ActiveRecord::Base
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class AlreadyActed < StandardError; end
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include RateLimiter::OnCreateRecord
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include Trashable
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belongs_to :post
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belongs_to :user
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belongs_to :post_action_type
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belongs_to :related_post, class_name: 'Post'
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rate_limit :post_action_rate_limiter
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scope :spam_flags, -> { where(post_action_type_id: PostActionType.types[:spam]) }
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def self.update_flagged_posts_count
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posts_flagged_count = PostAction.joins(post: :topic)
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.where('defer = false or defer IS NULL')
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.where('post_actions.post_action_type_id' => PostActionType.notify_flag_type_ids,
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'posts.deleted_at' => nil,
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'topics.deleted_at' => nil)
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.count('DISTINCT posts.id')
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$redis.set('posts_flagged_count', posts_flagged_count)
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user_ids = User.staff.pluck(:id)
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MessageBus.publish('/flagged_counts', { total: posts_flagged_count }, { user_ids: user_ids })
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end
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def self.flagged_posts_count
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$redis.get('posts_flagged_count').to_i
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end
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def self.counts_for(collection, user)
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return {} if collection.blank?
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collection_ids = collection.map {|p| p.id}
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user_id = user.present? ? user.id : 0
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result = PostAction.where(post_id: collection_ids, user_id: user_id)
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user_actions = {}
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result.each do |r|
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user_actions[r.post_id] ||= {}
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user_actions[r.post_id][r.post_action_type_id] = r
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end
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user_actions
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end
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def self.count_per_day_for_type(sinceDaysAgo = 30, post_action_type)
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unscoped.where(post_action_type_id: post_action_type).where('created_at > ?', sinceDaysAgo.days.ago).group('date(created_at)').order('date(created_at)').count
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end
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def self.clear_flags!(post, moderator_id, action_type_id = nil)
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# -1 is the automatic system cleary
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actions = if action_type_id
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[action_type_id]
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else
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moderator_id == -1 ? PostActionType.auto_action_flag_types.values : PostActionType.flag_types.values
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end
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PostAction.update_all({ deleted_at: Time.zone.now, deleted_by: moderator_id }, { post_id: post.id, post_action_type_id: actions })
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f = actions.map{|t| ["#{PostActionType.types[t]}_count", 0]}
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Post.with_deleted.update_all(Hash[*f.flatten], id: post.id)
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update_flagged_posts_count
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end
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def self.defer_flags!(post, moderator_id)
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actions = PostAction.where(
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defer: nil,
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post_id: post.id,
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post_action_type_id:
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PostActionType.flag_types.values,
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deleted_at: nil
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)
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actions.each do |a|
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a.defer = true
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a.defer_by = moderator_id
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# so callback is called
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a.save
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end
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update_flagged_posts_count
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end
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def self.act(user, post, post_action_type_id, opts={})
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begin
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title, target_usernames, target_group_names, subtype, body = nil
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if opts[:message]
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[:notify_moderators, :notify_user].each do |k|
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if post_action_type_id == PostActionType.types[k]
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if k == :notify_moderators
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target_group_names = target_moderators
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else
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target_usernames = post.user.username
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end
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title = I18n.t("post_action_types.#{k}.email_title",
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title: post.topic.title)
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body = I18n.t("post_action_types.#{k}.email_body",
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message: opts[:message],
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link: "#{Discourse.base_url}#{post.url}")
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subtype = k == :notify_moderators ? TopicSubtype.notify_moderators : TopicSubtype.notify_user
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end
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end
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end
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related_post_id = nil
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if target_usernames.present? || target_group_names.present?
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related_post_id = PostCreator.new(user,
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target_usernames: target_usernames,
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target_group_names: target_group_names,
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archetype: Archetype.private_message,
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subtype: subtype,
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title: title,
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raw: body
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).create.id
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end
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create( post_id: post.id,
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user_id: user.id,
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post_action_type_id: post_action_type_id,
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message: opts[:message],
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staff_took_action: opts[:take_action] || false,
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related_post_id: related_post_id )
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rescue ActiveRecord::RecordNotUnique
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# can happen despite being .create
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# since already bookmarked
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true
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end
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end
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def self.remove_act(user, post, post_action_type_id)
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if action = where(post_id: post.id,
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user_id: user.id,
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post_action_type_id:
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post_action_type_id).first
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action.trash!
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action.run_callbacks(:save)
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end
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end
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def remove_act!(user)
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trash!
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run_callbacks(:save)
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end
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def is_bookmark?
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post_action_type_id == PostActionType.types[:bookmark]
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end
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def is_like?
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post_action_type_id == PostActionType.types[:like]
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end
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def is_flag?
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PostActionType.flag_types.values.include?(post_action_type_id)
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end
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def is_private_message?
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post_action_type_id == PostActionType.types[:notify_user] ||
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post_action_type_id == PostActionType.types[:notify_moderators]
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end
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# A custom rate limiter for this model
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def post_action_rate_limiter
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return unless is_flag? || is_bookmark? || is_like?
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return @rate_limiter if @rate_limiter.present?
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%w(like flag bookmark).each do |type|
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if send("is_#{type}?")
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@rate_limiter = RateLimiter.new(user, "create_#{type}:#{Date.today.to_s}", SiteSetting.send("max_#{type}s_per_day"), 1.day.to_i)
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return @rate_limiter
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end
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end
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end
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before_create do
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post_action_type_ids = is_flag? ? PostActionType.flag_types.values : post_action_type_id
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raise AlreadyActed if PostAction.where(user_id: user_id,
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post_id: post_id,
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post_action_type_id: post_action_type_ids,
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deleted_at: nil)
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.exists?
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end
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# Returns the flag counts for a post, taking into account that some users
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# can weigh flags differently.
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def self.flag_counts_for(post_id)
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flag_counts = exec_sql("SELECT SUM(CASE
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WHEN pa.deleted_at IS NULL AND (pa.staff_took_action) THEN :flags_required_to_hide_post
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WHEN pa.deleted_at IS NULL AND (NOT pa.staff_took_action) THEN 1
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ELSE 0
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END) AS new_flags,
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SUM(CASE
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WHEN pa.deleted_at IS NOT NULL AND (pa.staff_took_action) THEN :flags_required_to_hide_post
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WHEN pa.deleted_at IS NOT NULL AND (NOT pa.staff_took_action) THEN 1
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ELSE 0
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END) AS old_flags
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FROM post_actions AS pa
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INNER JOIN users AS u ON u.id = pa.user_id
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WHERE pa.post_id = :post_id AND
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pa.post_action_type_id IN (:post_action_types)",
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post_id: post_id,
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post_action_types: PostActionType.auto_action_flag_types.values,
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flags_required_to_hide_post: SiteSetting.flags_required_to_hide_post).first
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[flag_counts['old_flags'].to_i, flag_counts['new_flags'].to_i]
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end
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after_save do
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# Update denormalized counts
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post_action_type = PostActionType.types[post_action_type_id]
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column = "#{post_action_type.to_s}_count"
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delta = deleted_at.nil? ? 1 : -1
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# We probably want to refactor this method to something cleaner.
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case post_action_type
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when :vote
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# Voting also changes the sort_order
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Post.update_all ["vote_count = vote_count + :delta, sort_order = :max - (vote_count + :delta)",
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delta: delta,
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max: Topic.max_sort_order], id: post_id
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when :like
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# `like_score` is weighted higher for staff accounts
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Post.update_all ["like_count = like_count + :delta, like_score = like_score + :score_delta",
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delta: delta,
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score_delta: user.staff? ? delta * SiteSetting.staff_like_weight : delta], id: post_id
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else
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Post.update_all ["#{column} = #{column} + ?", delta], id: post_id
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end
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Topic.update_all ["#{column} = #{column} + ?", delta], id: post.topic_id
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if PostActionType.notify_flag_type_ids.include?(post_action_type_id)
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PostAction.update_flagged_posts_count
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end
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PostAction.auto_hide_if_needed(post, post_action_type)
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SpamRulesEnforcer.enforce!(post.user) if post_action_type == :spam
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end
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def self.auto_hide_if_needed(post, post_action_type)
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return if post.hidden
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if PostActionType.auto_action_flag_types.include?(post_action_type) &&
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SiteSetting.flags_required_to_hide_post > 0
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old_flags, new_flags = PostAction.flag_counts_for(post.id)
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if new_flags >= SiteSetting.flags_required_to_hide_post
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hide_post!(post, guess_hide_reason(old_flags))
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end
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end
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end
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def self.hide_post!(post, reason=nil)
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return if post.hidden
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unless reason
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old_flags,_ = PostAction.flag_counts_for(post.id)
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reason = guess_hide_reason(old_flags)
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end
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Post.update_all(["hidden = true, hidden_reason_id = COALESCE(hidden_reason_id, ?)", reason], id: post.id)
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Topic.update_all({ visible: false },
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["id = :topic_id AND NOT EXISTS(SELECT 1 FROM POSTS WHERE topic_id = :topic_id AND NOT hidden)",
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topic_id: post.topic_id])
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# inform user
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if post.user
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SystemMessage.create(post.user,
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:post_hidden,
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url: post.url,
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edit_delay: SiteSetting.cooldown_minutes_after_hiding_posts)
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end
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end
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def self.guess_hide_reason(old_flags)
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old_flags > 0 ?
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Post.hidden_reasons[:flag_threshold_reached_again] :
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Post.hidden_reasons[:flag_threshold_reached]
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end
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def self.flagged_posts_report(filter)
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actions = flagged_post_actions(filter)
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post_ids = actions.limit(300).pluck(:post_id).uniq
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return nil if post_ids.blank?
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posts = SqlBuilder.new("SELECT p.id, t.title, p.cooked, p.user_id,
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p.topic_id, p.post_number, p.hidden, t.visible topic_visible,
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p.deleted_at, t.deleted_at topic_deleted_at
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FROM posts p
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JOIN topics t ON t.id = p.topic_id
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WHERE p.id in (:post_ids)").map_exec(OpenStruct, post_ids: post_ids)
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post_lookup = {}
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users = Set.new
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posts.each do |p|
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users << p.user_id
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p.excerpt = Post.excerpt(p.cooked)
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p.topic_slug = Slug.for(p.title)
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post_lookup[p.id] = p
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end
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# maintain order
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posts = post_ids.map{|id| post_lookup[id]}
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post_actions = actions.where(:post_id => post_ids)
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# TODO this is so far from optimal, it should not be
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# selecting all the columns but the includes stops working
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# with the code below
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#
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# .select('post_actions.id,
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# post_actions.user_id,
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# post_action_type_id,
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# post_actions.created_at,
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# post_actions.post_id,
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# post_actions.message')
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# .to_a
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post_actions.each do |pa|
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post = post_lookup[pa.post_id]
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post.post_actions ||= []
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action = pa.attributes
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if (pa.related_post && pa.related_post.topic)
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action.merge!(topic_id: pa.related_post.topic_id,
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slug: pa.related_post.topic.slug,
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permalink: pa.related_post.topic.url)
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end
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post.post_actions << action
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users << pa.user_id
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end
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# TODO add serializer so we can skip this
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posts.map!(&:marshal_dump)
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[posts, User.select([:id, :username, :email]).where(id: users.to_a).all]
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end
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protected
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def self.flagged_post_actions(filter)
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post_actions = PostAction
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.includes({:related_post => :topic})
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.where(post_action_type_id: PostActionType.notify_flag_type_ids)
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.joins(:post => :topic)
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.order('post_actions.created_at DESC')
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if filter == 'old'
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post_actions
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.with_deleted
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.where('post_actions.deleted_at IS NOT NULL OR
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defer = true OR
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topics.deleted_at IS NOT NULL OR
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posts.deleted_at IS NOT NULL')
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else
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post_actions
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.where('defer IS NULL OR
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defer = false')
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.where('posts.deleted_at IS NULL AND
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topics.deleted_at IS NULL')
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end
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end
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def self.target_moderators
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Group[:moderators].name
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end
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end
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# == Schema Information
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#
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# Table name: post_actions
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#
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# id :integer not null, primary key
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# post_id :integer not null
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# user_id :integer not null
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# post_action_type_id :integer not null
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# deleted_at :datetime
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# created_at :datetime not null
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# updated_at :datetime not null
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# deleted_by :integer
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# message :text
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# related_post_id :integer
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# staff_took_action :boolean default(FALSE), not null
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# defer :boolean
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# defer_by :integer
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#
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# Indexes
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#
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# idx_unique_actions (user_id,post_action_type_id,post_id,deleted_at) UNIQUE
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# index_post_actions_on_post_id (post_id)
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#
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