discourse/lib/post_action_creator.rb

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# frozen_string_literal: true
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class PostActionCreator
class CreateResult < PostActionResult
attr_accessor :post_action, :reviewable, :reviewable_score
end
# Shortcut methods for easier invocation
class << self
def create(created_by, post, action_key, message: nil, created_at: nil, reason: nil)
new(
created_by,
post,
PostActionType.types[action_key],
message: message,
created_at: created_at,
reason: reason
).perform
end
[:like, :off_topic, :spam, :inappropriate, :bookmark].each do |action|
define_method(action) do |created_by, post|
create(created_by, post, action)
end
end
[:notify_moderators, :notify_user].each do |action|
define_method(action) do |created_by, post, message = nil|
create(created_by, post, action, message: message)
end
end
end
def initialize(
created_by,
post,
post_action_type_id,
is_warning: false,
message: nil,
take_action: false,
flag_topic: false,
created_at: nil,
queue_for_review: false,
reason: nil
)
@created_by = created_by
@created_at = created_at || Time.zone.now
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@post = post
@post_action_type_id = post_action_type_id
@post_action_name = PostActionType.types[@post_action_type_id]
@is_warning = is_warning
@take_action = take_action && guardian.is_staff?
@message = message
@flag_topic = flag_topic
@meta_post = nil
@reason = reason
@queue_for_review = queue_for_review
if reason.nil? && @queue_for_review
@reason = 'queued_by_staff'
end
end
def post_can_act?
guardian.post_can_act?(
@post,
@post_action_name,
opts: {
is_warning: @is_warning,
taken_actions: PostAction.counts_for([@post].compact, @created_by)[@post&.id]
}
)
end
def perform
result = CreateResult.new
if !post_can_act? || (@queue_for_review && !guardian.is_staff?)
result.forbidden = true
result.add_error(I18n.t("invalid_access"))
return result
end
PostAction.limit_action!(@created_by, @post, @post_action_type_id)
reviewable = Reviewable.includes(:reviewable_scores).find_by(target: @post)
if reviewable && flagging_post? && cannot_flag_again?(reviewable)
result.add_error(I18n.t("reviewables.already_handled"))
return result
end
# create meta topic / post if needed
if @message.present? && [:notify_moderators, :notify_user, :spam].include?(@post_action_name)
creator = create_message_creator
post = creator.create
if creator.errors.present?
result.add_errors_from(creator)
return result
end
@meta_post = post
end
begin
post_action = create_post_action
if post_action.blank? || post_action.errors.present?
result.add_errors_from(post_action)
else
create_reviewable(result)
enforce_rules
UserActionManager.post_action_created(post_action)
PostActionNotifier.post_action_created(post_action)
notify_subscribers
# agree with other flags
if @take_action && reviewable = @post.reviewable_flag
result.reviewable.perform(@created_by, :agree_and_keep)
post_action.try(:update_counters)
end
result.success = true
result.post_action = post_action
end
rescue ActiveRecord::RecordNotUnique
# If the user already performed this action, it's probably due to a different browser tab
# or non-debounced clicking. We can ignore.
result.success = true
result.post_action = PostAction.find_by(
user: @created_by,
post: @post,
post_action_type_id: @post_action_type_id
)
end
result
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end
private
def flagging_post?
PostActionType.notify_flag_type_ids.include?(@post_action_type_id)
end
def cannot_flag_again?(reviewable)
return false if @post_action_type_id == PostActionType.types[:notify_moderators]
flag_type_already_used = reviewable.reviewable_scores.any? { |rs| rs.reviewable_score_type == @post_action_type_id && rs.status != ReviewableScore.statuses[:pending] }
not_edited_since_last_review = @post.last_version_at.blank? || reviewable.updated_at > @post.last_version_at
handled_recently = reviewable.updated_at > SiteSetting.cooldown_hours_until_reflag.to_i.hours.ago
flag_type_already_used && not_edited_since_last_review && handled_recently
end
def notify_subscribers
if self.class.notify_types.include?(@post_action_name)
@post.publish_change_to_clients! :acted
end
end
def self.notify_types
@notify_types ||= ([:like] + PostActionType.notify_flag_types.keys)
end
def enforce_rules
auto_close_if_threshold_reached
auto_hide_if_needed
SpamRule::AutoSilence.new(@post.user, @post).perform
end
def auto_close_if_threshold_reached
return if topic.nil? || topic.closed?
return unless topic.auto_close_threshold_reached?
# 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
)
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end
def auto_hide_if_needed
return if @post.hidden?
return if !@created_by.staff? && @post.user&.staff?
not_auto_action_flag_type = !PostActionType.auto_action_flag_types.include?(@post_action_name)
return if not_auto_action_flag_type && !@queue_for_review
if @queue_for_review
@post.topic.update_status('visible', false, @created_by) if @post.is_first_post?
@post.hide!(
@post_action_type_id,
Post.hidden_reasons[:flag_threshold_reached],
custom_message: :queued_by_staff
)
return
end
if trusted_spam_flagger?
@post.hide!(@post_action_type_id, Post.hidden_reasons[:flagged_by_tl3_user])
return
end
score = ReviewableFlaggedPost.find_by(target: @post)&.score || 0
if score >= Reviewable.score_required_to_hide_post
@post.hide!(@post_action_type_id)
end
end
# Special case: If you have TL3 and the user is TL0, and the flag is spam,
# hide it immediately.
def trusted_spam_flagger?
SiteSetting.high_trust_flaggers_auto_hide_posts &&
@post_action_name == :spam &&
@created_by.has_trust_level?(TrustLevel[3]) &&
@post.user&.trust_level == TrustLevel[0]
end
def create_post_action
@targets_topic = !!(
if @flag_topic && @post.topic
@post.topic.reload.posts_count != 1
end
)
where_attrs = {
post_id: @post.id,
user_id: @created_by.id,
post_action_type_id: @post_action_type_id
}
action_attrs = {
staff_took_action: @take_action,
related_post_id: @meta_post&.id,
targets_topic: @targets_topic,
created_at: @created_at
}
# First try to revive a trashed record
post_action = PostAction.where(where_attrs)
.with_deleted
.where("deleted_at IS NOT NULL")
.first
if post_action
post_action.recover!
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action_attrs.each { |attr, val| post_action.public_send("#{attr}=", val) }
post_action.save
else
post_action = PostAction.create(where_attrs.merge(action_attrs))
if post_action && post_action.errors.count == 0
BadgeGranter.queue_badge_grant(Badge::Trigger::PostAction, post_action: post_action)
end
end
if post_action
case @post_action_type_id
when *PostActionType.notify_flag_type_ids
DiscourseEvent.trigger(:flag_created, post_action)
when PostActionType.types[:like]
DiscourseEvent.trigger(:like_created, post_action)
end
end
GivenDailyLike.increment_for(@created_by.id) if @post_action_type_id == PostActionType.types[:like]
post_action
rescue ActiveRecord::RecordNotUnique
# can happen despite being .create
# since already bookmarked
PostAction.where(where_attrs).first
end
def create_message_creator
title = I18n.t(
"post_action_types.#{@post_action_name}.email_title",
title: @post.topic.title,
locale: SiteSetting.default_locale
)
body = I18n.t(
"post_action_types.#{@post_action_name}.email_body",
message: @message,
link: "#{Discourse.base_url}#{@post.url}",
locale: SiteSetting.default_locale
)
create_args = {
archetype: Archetype.private_message,
is_warning: @is_warning,
title: title.truncate(SiteSetting.max_topic_title_length, separator: /\s/),
raw: body
}
if [:notify_moderators, :spam].include?(@post_action_name)
create_args[:subtype] = TopicSubtype.notify_moderators
create_args[:target_group_names] = Group[:moderators].name
else
create_args[:subtype] = TopicSubtype.notify_user
create_args[:target_usernames] =
if @post_action_name == :notify_user
@post.user.username
elsif @post_action_name != :notify_moderators
# this is a hack to allow a PM with no recipients, we should think through
# a cleaner technique, a PM with myself is valid for flagging
'x'
end
end
PostCreator.new(@created_by, create_args)
end
def create_reviewable(result)
return unless flagging_post?
return if @post.user_id.to_i < 0
result.reviewable = ReviewableFlaggedPost.needs_review!(
created_by: @created_by,
target: @post,
topic: @post.topic,
reviewable_by_moderator: true,
potential_spam: @post_action_type_id == PostActionType.types[:spam],
payload: {
targets_topic: @targets_topic
}
)
result.reviewable_score = result.reviewable.add_score(
@created_by,
@post_action_type_id,
created_at: @created_at,
take_action: @take_action,
meta_topic_id: @meta_post&.topic_id,
reason: @reason,
force_review: trusted_spam_flagger?
)
end
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def guardian
@guardian ||= Guardian.new(@created_by)
end
def topic
@post.topic
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end
end