384 lines
13 KiB
Ruby
384 lines
13 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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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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after_save :update_counters
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after_save :enforce_rules
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after_commit :notify_subscribers
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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.where({ post_id: post.id, post_action_type_id: actions }).update_all({ deleted_at: Time.zone.now, deleted_by_id: moderator_id })
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f = actions.map{|t| ["#{PostActionType.types[t]}_count", 0]}
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Post.where(id: post.id).with_deleted.update_all(Hash[*f.flatten])
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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: 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.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].include?(post_action_type)
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title = I18n.t("post_action_types.#{post_action_type}.email_title", title: post.topic.title)
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body = I18n.t("post_action_types.#{post_action_type}.email_body", message: opts[:message], link: "#{Discourse.base_url}#{post.url}")
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opts = {
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archetype: Archetype.private_message,
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title: title,
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raw: body
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}
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if post_action_type == :notify_moderators
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opts[:subtype] = TopicSubtype.notify_moderators
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opts[:target_group_names] = "moderators"
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else
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opts[:subtype] = TopicSubtype.notify_user
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opts[:target_usernames] = 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 reciepients, 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.act(user, post, post_action_type_id, opts={})
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related_post_id = create_message_for_post_action(user,post,post_action_type_id,opts)
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targets_topic = if opts[:flag_topic] and post.topic
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post.topic.reload
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post.topic.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_attributes = {
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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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targets_topic: !!targets_topic
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}
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# First try to revive a trashed record
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row_count = PostAction.where(where_attrs)
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.with_deleted
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.where("deleted_at IS NOT NULL")
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.update_all(action_attributes.merge(deleted_at: nil))
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if row_count == 0
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post_action = create(where_attrs.merge(action_attributes))
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if post_action && post_action.is_like?
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BadgeGranter.update_badges(action: :post_like, post_id: post.id)
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end
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else
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post_action = PostAction.where(where_attrs).first
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post_action.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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true
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end
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def self.remove_act(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 if user.try(:staff?)
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if action = finder.first
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action.remove_act!(user)
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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.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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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.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_key
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when :vote
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# Voting also changes the sort_order
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Post.where(id: post_id).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]
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when :like
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# `like_score` is weighted higher for staff accounts
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Post.where(id: post_id).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]
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else
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Post.where(id: post_id).update_all ["#{column} = #{column} + ?", delta]
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end
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post = Post.with_deleted.where(id: post_id).first
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Topic.where(id: post.topic_id).update_all ["#{column} = #{column} + ?", delta]
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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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end
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def enforce_rules
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post = Post.with_deleted.where(id: post_id).first
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PostAction.auto_hide_if_needed(post, post_action_type_key)
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SpamRulesEnforcer.enforce!(post.user) if post_action_type_key == :spam
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end
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def notify_subscribers
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if (is_like? || is_flag?) && post
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MessageBus.publish("/topic/#{post.topic_id}",{
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id: post.id,
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post_number: post.post_number,
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type: "acted"
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},
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group_ids: post.topic.secure_group_ids
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)
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end
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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, post_action_type, 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, post_action_type, 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.where(id: post.id).update_all(["hidden = true, hidden_at = CURRENT_TIMESTAMP, hidden_reason_id = COALESCE(hidden_reason_id, ?)", reason])
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Topic.where(["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]).update_all(visible: false)
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# inform user
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if post.user
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options = {
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url: post.url,
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edit_delay: SiteSetting.cooldown_minutes_after_hiding_posts,
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flag_reason: I18n.t("flag_reasons.#{post_action_type}"),
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}
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SystemMessage.create(post.user, :post_hidden, options)
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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.post_action_type_for_post(post_id)
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post_action = PostAction.find_by(defer: nil, post_id: post_id, post_action_type_id: PostActionType.flag_types.values, deleted_at: nil)
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PostActionType.types[post_action.post_action_type_id]
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end
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protected
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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
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# updated_at :datetime
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# deleted_by_id :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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# targets_topic :boolean default(FALSE)
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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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