Class: PostAction

Inherits:
ActiveRecord::Base
  • Object
show all
Includes:
RateLimiter::OnCreateRecord, Trashable
Defined in:
app/models/post_action.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Trashable

#recover!, #trash!, #trashed?

Methods included from RateLimiter::OnCreateRecord

#default_rate_limiter, #disable_rate_limits!, included

Class Method Details

.copy(original_post, target_post) ⇒ Object 



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# File 'app/models/post_action.rb', line 126

def self.copy(original_post, target_post)
  cols_to_copy = (column_names - %w[id post_id]).join(", ")

  DB.exec <<~SQL
  INSERT INTO post_actions(post_id, #{cols_to_copy})
  SELECT #{target_post.id}, #{cols_to_copy}
  FROM post_actions
  WHERE post_id = #{original_post.id}
  SQL

  target_post.post_actions.each { |post_action| post_action.update_counters }
end

.count_per_day_for_type(post_action_type, opts = nil) ⇒ Object 



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# File 'app/models/post_action.rb', line 65

def self.count_per_day_for_type(post_action_type, opts = nil)
  opts ||= {}
  result = unscoped.where(post_action_type_id: post_action_type)
  result =
    result.where(
      "post_actions.created_at >= ?",
      opts[:start_date] || (opts[:since_days_ago] || 30).days.ago,
    )
  result = result.where("post_actions.created_at <= ?", opts[:end_date]) if opts[:end_date]
  if opts[:category_id]
    if opts[:include_subcategories]
      result =
        result.joins(post: :topic).where(
          "topics.category_id IN (?)",
          Category.subcategory_ids(opts[:category_id]),
        )
    else
      result = result.joins(post: :topic).where("topics.category_id = ?", opts[:category_id])
    end
  end

  if opts[:group_ids]
    result =
      result
        .joins("INNER JOIN users ON users.id = post_actions.user_id")
        .joins("INNER JOIN group_users ON group_users.user_id = users.id")
        .where("group_users.group_id IN (?)", opts[:group_ids])
  end

  result.group("date(post_actions.created_at)").order("date(post_actions.created_at)").count
end

.counts_for(collection, user) ⇒ Object 



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# File 'app/models/post_action.rb', line 23

def self.counts_for(collection, user)
  return {} if collection.blank? || !user

  collection_ids = collection.map(&:id)
  user_id = user.try(:id) || 0

  post_actions = PostAction.where(post_id: collection_ids, user_id: user_id)

   = {}
  post_actions.each do |post_action|
    [post_action.post_id] ||= {}
    [post_action.post_id][post_action.post_action_type_id] = post_action
  end

  
end

.limit_action!(user, post, post_action_type_id) ⇒ Object 



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# File 'app/models/post_action.rb', line 122

def self.limit_action!(user, post, post_action_type_id)
  RateLimiter.new(user, "post_action-#{post.id}_#{post_action_type_id}", 4, 1.minute).performed!
end

.lookup_for(user, topics, post_action_type_id) ⇒ Object 



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# File 'app/models/post_action.rb', line 40

def self.lookup_for(user, topics, post_action_type_id)
  return if topics.blank?
  # in critical path 2x faster than AR
  #
  topic_ids = topics.map(&:id)
  map = {}

  builder = DB.build <<~SQL
    SELECT p.topic_id, p.post_number
    FROM post_actions pa
    JOIN posts p ON pa.post_id = p.id
    WHERE p.deleted_at IS NULL AND pa.deleted_at IS NULL AND
       pa.post_action_type_id = :post_action_type_id AND
       pa.user_id = :user_id AND
       p.topic_id IN (:topic_ids)
    ORDER BY p.topic_id, p.post_number
  SQL

  builder
    .query(user_id: user.id, post_action_type_id: post_action_type_id, topic_ids: topic_ids)
    .each { |row| (map[row.topic_id] ||= []) << row.post_number }

  map
end

.remove_act(user, post, post_action_type_id) ⇒ Object 



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# File 'app/models/post_action.rb', line 139

def self.remove_act(user, post, post_action_type_id)
  Discourse.deprecate(
    "PostAction.remove_act is deprecated. Use `PostActionDestroyer` instead.",
    output_in_test: true,
    drop_from: "2.9.0",
  )

  PostActionDestroyer.new(user, post, post_action_type_id).perform
end

Instance Method Details

#add_moderator_post_if_needed(moderator, disposition, delete_post = false) ⇒ Object 



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# File 'app/models/post_action.rb', line 97

def add_moderator_post_if_needed(moderator, disposition, delete_post = false)
  return if !SiteSetting.auto_respond_to_flag_actions
  return if related_post.nil? || related_post.topic.nil?
  return if staff_already_replied?(related_post.topic)
  message_key = +"flags_dispositions.#{disposition}"
  message_key << "_and_deleted" if delete_post

  I18n.with_locale(SiteSetting.default_locale) do
    related_post.topic.add_moderator_post(moderator, I18n.t(message_key))
  end

  # archive message for moderators
  GroupArchivedMessage.archive!(Group[:moderators].id, related_post.topic)
end

#ensure_unique_actions ⇒ Object 



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# File 'app/models/post_action.rb', line 194

def ensure_unique_actions
  post_action_type_ids = is_flag? ? PostActionType.notify_flag_types.values : post_action_type_id

  acted =
    PostAction
      .where(user_id: user_id)
      .where(post_id: post_id)
      .where(post_action_type_id: post_action_type_ids)
      .where(deleted_at: nil)
      .where(disagreed_at: nil)
      .where(targets_topic: targets_topic)
      .exists?

  errors.add(:post_action_type_id) if acted
end

#is_flag? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/post_action.rb', line 161

def is_flag?
  !!PostActionType.notify_flag_types[post_action_type_id]
end

#is_like? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/post_action.rb', line 157

def is_like?
  post_action_type_id == PostActionType.types[:like]
end

#is_private_message? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/post_action.rb', line 165

def is_private_message?
  post_action_type_id == PostActionType.types[:notify_user] ||
    post_action_type_id == PostActionType.types[:notify_moderators]
end

#post_action_rate_limiter ⇒ Object

A custom rate limiter for this model



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# File 'app/models/post_action.rb', line 171

def post_action_rate_limiter
  return unless is_flag? || is_like?

  return @rate_limiter if @rate_limiter.present?

  %w[like flag].each do |type|
    if public_send("is_#{type}?")
      limit = SiteSetting.get("max_#{type}s_per_day")

      if (is_flag? || is_like?) && user && user.trust_level >= 2
        multiplier =
          SiteSetting.get("tl#{user.trust_level}_additional_#{type}s_per_day_multiplier").to_f
        multiplier = 1.0 if multiplier < 1.0

        limit = (limit * multiplier).to_i
      end

      @rate_limiter = RateLimiter.new(user, "create_#{type}", limit, 1.day.to_i)
      return @rate_limiter
    end
  end
end

#post_action_type_key ⇒ Object 



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# File 'app/models/post_action.rb', line 210

def post_action_type_key
  PostActionType.types[post_action_type_id]
end

#remove_act!(user) ⇒ Object 



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# File 'app/models/post_action.rb', line 149

def remove_act!(user)
  trash!(user)
  # NOTE: save is called to ensure all callbacks are called
  # trash will not trigger callbacks, and triggering after_commit
  # is not trivial
  save
end

#staff_already_replied?(topic) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/post_action.rb', line 112

def staff_already_replied?(topic)
  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?
end

#update_counters ⇒ Object 



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# File 'app/models/post_action.rb', line 214

def update_counters
  # Update denormalized counts
  column = "#{post_action_type_key}_count"
  count = PostAction.where(post_id: post_id).where(post_action_type_id: post_action_type_id).count

  # We probably want to refactor this method to something cleaner.
  case post_action_type_key
  when :like
    # 'like_score' is weighted higher for staff accounts
    score =
      PostAction
        .joins(:user)
        .where(post_id: post_id)
        .sum(
          "CASE WHEN users.moderator OR users.admin THEN #{SiteSetting.staff_like_weight} ELSE 1 END",
        )
    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).pick(:topic_id)

  # topic_user
  if post_action_type_key == :like
    TopicUser.update_post_action_cache(
      user_id: user_id,
      topic_id: topic_id,
      post_action_type: post_action_type_key,
    )
  end

  Topic.find_by(id: topic_id)&.update_action_counts if column == "like_count"
end