665 lines
22 KiB
Ruby
665 lines
22 KiB
Ruby
require_dependency 'rate_limiter'
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require_dependency 'system_message'
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class PostAction < ActiveRecord::Base
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class AlreadyActed < StandardError; end
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class FailedToCreatePost < 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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belongs_to :target_user, class_name: 'User'
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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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scope :flags, -> { where(post_action_type_id: PostActionType.notify_flag_type_ids) }
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scope :publics, -> { where(post_action_type_id: PostActionType.public_type_ids) }
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scope :active, -> { where(disagreed_at: nil, deferred_at: nil, agreed_at: nil, deleted_at: nil) }
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after_save :update_counters
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after_save :enforce_rules
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after_save :create_user_action
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after_save :update_notifications
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after_create :create_notifications
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after_commit :notify_subscribers
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def disposed_by_id
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disagreed_by_id || agreed_by_id || deferred_by_id
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end
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def disposed_at
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disagreed_at || agreed_at || deferred_at
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end
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def disposition
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return :disagreed if disagreed_at
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return :agreed if agreed_at
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return :deferred if deferred_at
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nil
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end
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def self.flag_count_by_date(start_date, end_date, category_id = nil)
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result = where('post_actions.created_at >= ? AND post_actions.created_at <= ?', start_date, end_date)
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result = result.where(post_action_type_id: PostActionType.flag_types_without_custom.values)
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result = result.joins(post: :topic).where("topics.category_id = ?", category_id) if category_id
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result.group('date(post_actions.created_at)')
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.order('date(post_actions.created_at)')
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.count
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end
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def self.update_flagged_posts_count
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flagged_relation = PostAction.active
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.flags
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.joins(post: :topic)
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.where('posts.deleted_at' => nil)
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.where('topics.deleted_at' => nil)
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.where('posts.user_id > 0')
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.group("posts.id")
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if SiteSetting.min_flags_staff_visibility > 1
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flagged_relation = flagged_relation
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.having("count(*) >= ?", SiteSetting.min_flags_staff_visibility)
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end
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posts_flagged_count = flagged_relation
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.pluck("posts.id")
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.count
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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? || !user
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collection_ids = collection.map(&:id)
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user_id = user.try(:id) || 0
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post_actions = PostAction.where(post_id: collection_ids, user_id: user_id)
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user_actions = {}
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post_actions.each do |post_action|
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user_actions[post_action.post_id] ||= {}
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user_actions[post_action.post_id][post_action.post_action_type_id] = post_action
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end
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user_actions
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end
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def self.lookup_for(user, topics, post_action_type_id)
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return if topics.blank?
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# in critical path 2x faster than AR
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#
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topic_ids = topics.map(&:id)
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map = {}
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builder = DB.build <<~SQL
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SELECT p.topic_id, p.post_number
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FROM post_actions pa
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JOIN posts p ON pa.post_id = p.id
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WHERE p.deleted_at IS NULL AND pa.deleted_at IS NULL AND
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pa.post_action_type_id = :post_action_type_id AND
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pa.user_id = :user_id AND
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p.topic_id IN (:topic_ids)
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ORDER BY p.topic_id, p.post_number
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SQL
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builder.query(user_id: user.id, post_action_type_id: post_action_type_id, topic_ids: topic_ids).each do |row|
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(map[row.topic_id] ||= []) << row.post_number
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end
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map
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end
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def self.active_flags_counts_for(collection)
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return {} if collection.blank?
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collection_ids = collection.map(&:id)
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post_actions = PostAction.active.flags.where(post_id: collection_ids)
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user_actions = {}
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post_actions.each do |post_action|
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user_actions[post_action.post_id] ||= {}
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user_actions[post_action.post_id][post_action.post_action_type_id] ||= []
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user_actions[post_action.post_id][post_action.post_action_type_id] << post_action
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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(post_action_type, opts = nil)
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opts ||= {}
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result = unscoped.where(post_action_type_id: post_action_type)
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result = result.where('post_actions.created_at >= ?', opts[:start_date] || (opts[:since_days_ago] || 30).days.ago)
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result = result.where('post_actions.created_at <= ?', opts[:end_date]) if opts[:end_date]
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result = result.joins(post: :topic).where('topics.category_id = ?', opts[:category_id]) if opts[:category_id]
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result.group('date(post_actions.created_at)')
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.order('date(post_actions.created_at)')
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.count
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end
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def self.agree_flags!(post, moderator, delete_post = false)
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actions = PostAction.active
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.where(post_id: post.id)
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.where(post_action_type_id: PostActionType.flag_types.values)
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trigger_spam = false
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actions.each do |action|
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action.agreed_at = Time.zone.now
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action.agreed_by_id = moderator.id
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# so callback is called
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action.save
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action.add_moderator_post_if_needed(moderator, :agreed, delete_post)
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trigger_spam = true if action.post_action_type_id == PostActionType.types[:spam]
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end
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DiscourseEvent.trigger(:confirmed_spam_post, post) if trigger_spam
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DiscourseEvent.trigger(:flag_reviewed, post)
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DiscourseEvent.trigger(:flag_agreed, actions.first) if actions.first.present?
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update_flagged_posts_count
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end
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def self.clear_flags!(post, moderator)
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# -1 is the automatic system cleary
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action_type_ids =
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if moderator.id == Discourse::SYSTEM_USER_ID
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PostActionType.auto_action_flag_types.values
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else
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PostActionType.notify_flag_type_ids
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end
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actions = PostAction.where(post_id: post.id)
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.where(post_action_type_id: action_type_ids)
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actions.each do |action|
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action.disagreed_at = Time.zone.now
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action.disagreed_by_id = moderator.id
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# so callback is called
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action.save
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action.add_moderator_post_if_needed(moderator, :disagreed)
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end
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# reset all cached counters
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cached = {}
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action_type_ids.each do |atid|
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column = "#{PostActionType.types[atid]}_count"
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cached[column] = 0 if ActiveRecord::Base.connection.column_exists?(:posts, column)
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end
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Post.with_deleted.where(id: post.id).update_all(cached)
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DiscourseEvent.trigger(:flag_reviewed, post)
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DiscourseEvent.trigger(:flag_disagreed, actions.first) if actions.first.present?
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update_flagged_posts_count
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end
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def self.defer_flags!(post, moderator, delete_post = false)
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actions = PostAction.active
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.where(post_id: post.id)
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.where(post_action_type_id: PostActionType.notify_flag_type_ids)
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actions.each do |action|
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action.deferred_at = Time.zone.now
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action.deferred_by_id = moderator.id
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# so callback is called
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action.save
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action.add_moderator_post_if_needed(moderator, :deferred, delete_post)
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end
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DiscourseEvent.trigger(:flag_reviewed, post)
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DiscourseEvent.trigger(:flag_deferred, actions.first) if actions.first.present?
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update_flagged_posts_count
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end
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def add_moderator_post_if_needed(moderator, disposition, delete_post = false)
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return if !SiteSetting.auto_respond_to_flag_actions
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return if related_post.nil? || related_post.topic.nil?
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return if staff_already_replied?(related_post.topic)
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message_key = "flags_dispositions.#{disposition}"
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message_key << "_and_deleted" if delete_post
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I18n.with_locale(SiteSetting.default_locale) do
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related_post.topic.add_moderator_post(moderator, I18n.t(message_key))
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end
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end
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def staff_already_replied?(topic)
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topic.posts.where("user_id IN (SELECT id FROM users WHERE moderator OR admin) OR (post_type != :regular_post_type)", regular_post_type: Post.types[:regular]).exists?
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end
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def self.create_message_for_post_action(user, post, post_action_type_id, opts)
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post_action_type = PostActionType.types[post_action_type_id]
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return unless opts[:message] && [:notify_moderators, :notify_user, :spam].include?(post_action_type)
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title = I18n.t("post_action_types.#{post_action_type}.email_title", title: post.topic.title, locale: SiteSetting.default_locale)
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body = I18n.t("post_action_types.#{post_action_type}.email_body", message: opts[:message], link: "#{Discourse.base_url}#{post.url}", locale: SiteSetting.default_locale)
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warning = opts[:is_warning] if opts[:is_warning].present?
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title = title.truncate(SiteSetting.max_topic_title_length, separator: /\s/)
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opts = {
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archetype: Archetype.private_message,
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is_warning: warning,
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title: title,
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raw: body
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}
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if [:notify_moderators, :spam].include?(post_action_type)
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opts[:subtype] = TopicSubtype.notify_moderators
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opts[:target_group_names] = target_moderators
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else
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opts[:subtype] = TopicSubtype.notify_user
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opts[:target_usernames] =
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if post_action_type == :notify_user
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post.user.username
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elsif post_action_type != :notify_moderators
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# this is a hack to allow a PM with no recipients, we should think through
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# a cleaner technique, a PM with myself is valid for flagging
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'x'
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end
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end
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PostCreator.new(user, opts).create!&.id
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end
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def self.limit_action!(user, post, post_action_type_id)
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RateLimiter.new(user, "post_action-#{post.id}_#{post_action_type_id}", 4, 1.minute).performed!
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end
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def self.act(user, post, post_action_type_id, opts = {})
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limit_action!(user, post, post_action_type_id)
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begin
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related_post_id = create_message_for_post_action(user, post, post_action_type_id, opts)
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rescue ActiveRecord::RecordNotSaved => e
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raise FailedToCreatePost.new(e.message)
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end
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staff_took_action = opts[:take_action] || false
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targets_topic =
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if opts[:flag_topic] && post.topic
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post.topic.reload.posts_count != 1
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end
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where_attrs = {
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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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}
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action_attrs = {
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staff_took_action: staff_took_action,
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related_post_id: related_post_id,
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targets_topic: !!targets_topic
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}
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# First try to revive a trashed record
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post_action = PostAction.where(where_attrs)
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.with_deleted
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.where("deleted_at IS NOT NULL")
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.first
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if post_action
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post_action.recover!
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action_attrs.each { |attr, val| post_action.send("#{attr}=", val) }
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post_action.save
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PostActionNotifier.post_action_created(post_action)
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else
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post_action = create(where_attrs.merge(action_attrs))
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if post_action && post_action.errors.count == 0
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BadgeGranter.queue_badge_grant(Badge::Trigger::PostAction, post_action: post_action)
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end
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end
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if post_action && PostActionType.notify_flag_type_ids.include?(post_action_type_id)
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DiscourseEvent.trigger(:flag_created, post_action)
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end
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GivenDailyLike.increment_for(user.id) if post_action_type_id == PostActionType.types[:like]
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# agree with other flags
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if staff_took_action
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PostAction.agree_flags!(post, user)
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post_action.try(:update_counters)
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end
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post_action
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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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PostAction.where(where_attrs).first
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end
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def self.copy(original_post, target_post)
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cols_to_copy = (column_names - %w{id post_id}).join(', ')
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DB.exec <<~SQL
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INSERT INTO post_actions(post_id, #{cols_to_copy})
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SELECT #{target_post.id}, #{cols_to_copy}
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FROM post_actions
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WHERE post_id = #{original_post.id}
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SQL
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target_post.post_actions.each { |post_action| post_action.update_counters }
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end
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def self.remove_act(user, post, post_action_type_id)
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limit_action!(user, post, post_action_type_id)
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finder = PostAction.where(post_id: post.id, user_id: user.id, post_action_type_id: post_action_type_id)
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finder = finder.with_deleted.includes(:post) if user.try(:staff?)
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if action = finder.first
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action.remove_act!(user)
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action.post.unhide! if action.staff_took_action
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GivenDailyLike.decrement_for(user.id) if post_action_type_id == PostActionType.types[:like]
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end
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end
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def remove_act!(user)
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trash!(user)
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# NOTE: save is called to ensure all callbacks are called
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# trash will not trigger callbacks, and triggering after_commit
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# is not trivial
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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.notify_flag_types[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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limit = SiteSetting.send("max_#{type}s_per_day")
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if is_like? && user && user.trust_level >= 2
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multiplier = SiteSetting.send("tl#{user.trust_level}_additional_likes_per_day_multiplier").to_f
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multiplier = 1.0 if multiplier < 1.0
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limit = (limit * multiplier).to_i
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end
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@rate_limiter = RateLimiter.new(user, "create_#{type}", limit, 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.notify_flag_types.values : post_action_type_id
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raise AlreadyActed if PostAction.where(user_id: user_id)
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.where(post_id: post_id)
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.where(post_action_type_id: post_action_type_ids)
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.where(deleted_at: nil)
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.where(disagreed_at: nil)
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.where(targets_topic: targets_topic)
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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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params = {
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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
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}
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DB.query_single(<<~SQL, params)
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SELECT COALESCE(SUM(CASE
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WHEN pa.disagreed_at IS NOT NULL AND pa.staff_took_action THEN :flags_required_to_hide_post
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WHEN pa.disagreed_at IS NOT NULL AND NOT pa.staff_took_action THEN 1
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ELSE 0
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END),0) AS old_flags,
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COALESCE(SUM(CASE
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WHEN pa.disagreed_at IS NULL AND pa.staff_took_action THEN :flags_required_to_hide_post
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WHEN pa.disagreed_at IS NULL AND NOT pa.staff_took_action THEN 1
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ELSE 0
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END), 0) AS new_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
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AND pa.post_action_type_id in (:post_action_types)
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AND pa.deleted_at IS NULL
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SQL
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end
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def post_action_type_key
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PostActionType.types[post_action_type_id]
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end
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def update_counters
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# Update denormalized counts
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column = "#{post_action_type_key}_count"
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count = PostAction.where(post_id: post_id)
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.where(post_action_type_id: post_action_type_id)
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.count
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# We probably want to refactor this method to something cleaner.
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case post_action_type_key
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when :like
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# 'like_score' is weighted higher for staff accounts
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score = PostAction.joins(:user)
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.where(post_id: post_id)
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.sum("CASE WHEN users.moderator OR users.admin THEN #{SiteSetting.staff_like_weight} ELSE 1 END")
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Post.where(id: post_id).update_all ["like_count = :count, like_score = :score", count: count, score: score]
|
|
else
|
|
if ActiveRecord::Base.connection.column_exists?(:posts, column)
|
|
Post.where(id: post_id).update_all ["#{column} = ?", count]
|
|
end
|
|
end
|
|
|
|
topic_id = Post.with_deleted.where(id: post_id).pluck(:topic_id).first
|
|
|
|
# topic_user
|
|
if [:like, :bookmark].include? post_action_type_key
|
|
TopicUser.update_post_action_cache(user_id: user_id,
|
|
topic_id: topic_id,
|
|
post_action_type: post_action_type_key)
|
|
end
|
|
|
|
if column == "like_count"
|
|
topic_count = Post.where(topic_id: topic_id).sum(column)
|
|
Topic.where(id: topic_id).update_all ["#{column} = ?", topic_count]
|
|
end
|
|
|
|
if PostActionType.notify_flag_type_ids.include?(post_action_type_id)
|
|
PostAction.update_flagged_posts_count
|
|
end
|
|
|
|
end
|
|
|
|
def enforce_rules
|
|
post = Post.with_deleted.where(id: post_id).first
|
|
PostAction.auto_close_if_threshold_reached(post.topic)
|
|
PostAction.auto_hide_if_needed(user, post, post_action_type_key)
|
|
SpamRulesEnforcer.enforce!(post.user)
|
|
end
|
|
|
|
def create_user_action
|
|
if is_bookmark? || is_like?
|
|
UserActionCreator.log_post_action(self)
|
|
end
|
|
end
|
|
|
|
def update_notifications
|
|
if self.deleted_at.present?
|
|
PostActionNotifier.post_action_deleted(self)
|
|
end
|
|
end
|
|
|
|
def create_notifications
|
|
PostActionNotifier.post_action_created(self)
|
|
end
|
|
|
|
def notify_subscribers
|
|
if (is_like? || is_flag?) && post
|
|
post.publish_change_to_clients! :acted
|
|
end
|
|
end
|
|
|
|
MAXIMUM_FLAGS_PER_POST = 3
|
|
|
|
def self.auto_close_if_threshold_reached(topic)
|
|
return if topic.nil? || topic.closed?
|
|
|
|
flags = PostAction.active
|
|
.flags
|
|
.joins(:post)
|
|
.where("posts.topic_id = ?", topic.id)
|
|
.where("post_actions.user_id > 0")
|
|
.group("post_actions.user_id")
|
|
.pluck("post_actions.user_id, COUNT(post_id)")
|
|
|
|
# we need a minimum number of unique flaggers
|
|
return if flags.count < SiteSetting.num_flaggers_to_close_topic
|
|
# we need a minimum number of flags
|
|
return if flags.sum { |f| f[1] } < SiteSetting.num_flags_to_close_topic
|
|
|
|
# the threshold has been reached, we will close the topic waiting for intervention
|
|
topic.update_status("closed", true, Discourse.system_user,
|
|
message: I18n.t(
|
|
"temporarily_closed_due_to_flags",
|
|
count: SiteSetting.num_hours_to_close_topic
|
|
)
|
|
)
|
|
|
|
topic.set_or_create_timer(
|
|
TopicTimer.types[:open],
|
|
SiteSetting.num_hours_to_close_topic,
|
|
by_user: Discourse.system_user
|
|
)
|
|
end
|
|
|
|
def self.auto_hide_if_needed(acting_user, post, post_action_type)
|
|
return if post.hidden?
|
|
return if (!acting_user.staff?) && post.user.staff?
|
|
|
|
if post_action_type == :spam &&
|
|
acting_user.has_trust_level?(TrustLevel[3]) &&
|
|
post.user.trust_level == TrustLevel[0]
|
|
|
|
hide_post!(post, post_action_type, Post.hidden_reasons[:flagged_by_tl3_user])
|
|
|
|
elsif PostActionType.auto_action_flag_types.include?(post_action_type) &&
|
|
SiteSetting.flags_required_to_hide_post > 0
|
|
|
|
_old_flags, new_flags = PostAction.flag_counts_for(post.id)
|
|
|
|
if new_flags >= SiteSetting.flags_required_to_hide_post
|
|
hide_post!(post, post_action_type, guess_hide_reason(post))
|
|
end
|
|
end
|
|
end
|
|
|
|
def self.hide_post!(post, post_action_type, reason = nil)
|
|
return if post.hidden
|
|
|
|
unless reason
|
|
reason = guess_hide_reason(post)
|
|
end
|
|
|
|
hiding_again = post.hidden_at.present?
|
|
|
|
post.hidden = true
|
|
post.hidden_at = Time.zone.now
|
|
post.hidden_reason_id = reason
|
|
post.save
|
|
|
|
Topic.where("id = :topic_id AND NOT EXISTS(SELECT 1 FROM POSTS WHERE topic_id = :topic_id AND NOT hidden)", topic_id: post.topic_id).update_all(visible: false)
|
|
|
|
# inform user
|
|
if post.user
|
|
options = {
|
|
url: post.url,
|
|
edit_delay: SiteSetting.cooldown_minutes_after_hiding_posts,
|
|
flag_reason: I18n.t("flag_reasons.#{post_action_type}", locale: SiteSetting.default_locale),
|
|
}
|
|
|
|
Jobs.enqueue_in(5.seconds, :send_system_message,
|
|
user_id: post.user.id,
|
|
message_type: hiding_again ? :post_hidden_again : :post_hidden,
|
|
message_options: options)
|
|
end
|
|
end
|
|
|
|
def self.guess_hide_reason(post)
|
|
post.hidden_at ?
|
|
Post.hidden_reasons[:flag_threshold_reached_again] :
|
|
Post.hidden_reasons[:flag_threshold_reached]
|
|
end
|
|
|
|
def self.post_action_type_for_post(post_id)
|
|
post_action = PostAction.find_by(deferred_at: nil, post_id: post_id, post_action_type_id: PostActionType.notify_flag_types.values, deleted_at: nil)
|
|
PostActionType.types[post_action.post_action_type_id]
|
|
end
|
|
|
|
def self.target_moderators
|
|
Group[:moderators].name
|
|
end
|
|
|
|
end
|
|
|
|
# == Schema Information
|
|
#
|
|
# Table name: post_actions
|
|
#
|
|
# id :integer not null, primary key
|
|
# post_id :integer not null
|
|
# user_id :integer not null
|
|
# post_action_type_id :integer not null
|
|
# deleted_at :datetime
|
|
# created_at :datetime not null
|
|
# updated_at :datetime not null
|
|
# deleted_by_id :integer
|
|
# related_post_id :integer
|
|
# staff_took_action :boolean default(FALSE), not null
|
|
# deferred_by_id :integer
|
|
# targets_topic :boolean default(FALSE), not null
|
|
# agreed_at :datetime
|
|
# agreed_by_id :integer
|
|
# deferred_at :datetime
|
|
# disagreed_at :datetime
|
|
# disagreed_by_id :integer
|
|
#
|
|
# Indexes
|
|
#
|
|
# idx_unique_actions (user_id,post_action_type_id,post_id,targets_topic) UNIQUE
|
|
# idx_unique_flags (user_id,post_id,targets_topic) UNIQUE
|
|
# index_post_actions_on_post_id (post_id)
|
|
# index_post_actions_on_user_id_and_post_action_type_id (user_id,post_action_type_id)
|
|
#
|