Class: PostRevisor

Inherits:
Object
  • Object
show all
Defined in:
lib/post_revisor.rb

Defined Under Namespace

Classes: TopicChanges

Constant Summary collapse

POST_TRACKED_FIELDS = 
%w[raw cooked edit_reason user_id wiki post_type]

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(post, topic = post.topic) ⇒ PostRevisor

Returns a new instance of PostRevisor.



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# File 'lib/post_revisor.rb', line 47

def initialize(post, topic = post.topic)
  @post = post
  @topic = topic

  # Make sure we have only one Topic instance
  post.topic = topic
end

Instance Attribute Details

#category_changed ⇒ Object (readonly)

Returns the value of attribute category_changed.



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# File 'lib/post_revisor.rb', line 45

def category_changed
  @category_changed
end

#post_revision ⇒ Object (readonly)

Returns the value of attribute post_revision.



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# File 'lib/post_revisor.rb', line 45

def post_revision
  @post_revision
end

Class Method Details

.create_small_action_for_category_change(topic:, user:, old_category:, new_category:) ⇒ Object 



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# File 'lib/post_revisor.rb', line 156

def self.create_small_action_for_category_change(topic:, user:, old_category:, new_category:)
  return if !SiteSetting.create_post_for_category_and_tag_changes

  topic.add_moderator_post(
    user,
    I18n.t(
      "topic_category_changed",
      from: "##{old_category.slug_ref}",
      to: "##{new_category.slug_ref}",
    ),
    post_type: Post.types[:small_action],
    action_code: "category_changed",
  )
end

.create_small_action_for_tag_changes(topic:, user:, added_tags:, removed_tags:) ⇒ Object 



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# File 'lib/post_revisor.rb', line 171

def self.create_small_action_for_tag_changes(topic:, user:, added_tags:, removed_tags:)
  return if !SiteSetting.create_post_for_category_and_tag_changes

  topic.add_moderator_post(
    user,
    tags_changed_raw(added: added_tags, removed: removed_tags),
    post_type: Post.types[:small_action],
    action_code: "tags_changed",
    custom_fields: {
      tags_added: added_tags,
      tags_removed: removed_tags,
    },
  )
end

.tag_list_to_raw(tag_list) ⇒ Object 



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# File 'lib/post_revisor.rb', line 200

def self.tag_list_to_raw(tag_list)
  tag_list.sort.map { |tag_name| "##{tag_name}" }.join(", ")
end

.tags_changed_raw(added:, removed:) ⇒ Object 



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# File 'lib/post_revisor.rb', line 186

def self.tags_changed_raw(added:, removed:)
  if removed.present? && added.present?
    I18n.t(
      "topic_tag_changed.added_and_removed",
      added: tag_list_to_raw(added),
      removed: tag_list_to_raw(removed),
    )
  elsif added.present?
    I18n.t("topic_tag_changed.added", added: tag_list_to_raw(added))
  elsif removed.present?
    I18n.t("topic_tag_changed.removed", removed: tag_list_to_raw(removed))
  end
end

.track_and_revise(topic_changes, field, attribute) ⇒ Object 



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# File 'lib/post_revisor.rb', line 69

def self.track_and_revise(topic_changes, field, attribute)
  topic_changes.record_change(field, topic_changes.topic.public_send(field), attribute)
  topic_changes.topic.public_send("#{field}=", attribute)
end

.track_topic_field(field, &block) ⇒ Object 



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# File 'lib/post_revisor.rb', line 60

def self.track_topic_field(field, &block)
  tracked_topic_fields[field] = block

  # Define it in the serializer unless it already has been defined
  unless PostRevisionSerializer.instance_methods(false).include?("#{field}_changes".to_sym)
    PostRevisionSerializer.add_compared_field(field)
  end
end

.tracked_topic_fields ⇒ Object 



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# File 'lib/post_revisor.rb', line 55

def self.tracked_topic_fields
  @@tracked_topic_fields ||= {}
  @@tracked_topic_fields
end

Instance Method Details

#advance_draft_sequence ⇒ Object 



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# File 'lib/post_revisor.rb', line 709

def advance_draft_sequence
  @post.advance_draft_sequence
end

#alert_users ⇒ Object 



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# File 'lib/post_revisor.rb', line 732

def alert_users
  return if @editor.id == Discourse::SYSTEM_USER_ID
  Jobs.enqueue(:post_alert, post_id: @post.id)
end

#bump_topic ⇒ Object 



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# File 'lib/post_revisor.rb', line 648

def bump_topic
  return if bypass_bump? || !is_last_post?
  @topic.update_column(:bumped_at, Time.now)
  TopicTrackingState.publish_muted(@topic)
  TopicTrackingState.publish_unmuted(@topic)
  TopicTrackingState.publish_latest(@topic)
end

#bypass_bump? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/post_revisor.rb', line 656

def bypass_bump?
  !@post_successfully_saved || @topic_changes.errored? || @opts[:bypass_bump] == true ||
    @post.whisper? || only_hidden_tags_changed?
end

#bypass_rate_limiter? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/post_revisor.rb', line 644

def bypass_rate_limiter?
  @opts[:bypass_rate_limiter] == true
end

#cached_original_cooked ⇒ Object 



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# File 'lib/post_revisor.rb', line 393

def cached_original_cooked
  @cached_original_cooked ||= Discourse.redis.get(original_cooked_key)
end

#cached_original_raw ⇒ Object 



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# File 'lib/post_revisor.rb', line 389

def cached_original_raw
  @cached_original_raw ||= Discourse.redis.get(original_raw_key)
end

#cleanup_whitespaces(raw) ⇒ Object 



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# File 'lib/post_revisor.rb', line 332

def cleanup_whitespaces(raw)
  raw.present? ? TextCleaner.normalize_whitespaces(raw).rstrip : ""
end

#create_or_update_revision ⇒ Object 



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# File 'lib/post_revisor.rb', line 574

def create_or_update_revision
  return if @skip_revision
  # don't create an empty revision if something failed
  return unless successfully_saved_post_and_topic
  @version_changed ? create_revision : update_revision
end

#create_revision ⇒ Object 



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# File 'lib/post_revisor.rb', line 581

def create_revision
  modifications = post_changes.merge(@topic_changes.diff)

  modifications["raw"][0] = cached_original_raw || modifications["raw"][0] if modifications["raw"]

  if modifications["cooked"]
    modifications["cooked"][0] = cached_original_cooked || modifications["cooked"][0]
  end

  @post_revision =
    PostRevision.create!(
      user_id: @post.last_editor_id,
      post_id: @post.id,
      number: @post.version,
      modifications: modifications,
      hidden: only_hidden_tags_changed?,
    )
end

#diff_size(before, after) ⇒ Object 



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# File 'lib/post_revisor.rb', line 411

def diff_size(before, after)
  @diff_size ||=
    begin
      ONPDiff.new(before, after).short_diff.sum { |str, type| type == :common ? 0 : str.size }
    end
end

#edit_reason_specified? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/post_revisor.rb', line 369

def edit_reason_specified?
  @fields[:edit_reason].present? && @fields[:edit_reason] != @post.edit_reason
end

#edited_by_another_user? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/post_revisor.rb', line 377

def edited_by_another_user?
  @post.last_editor_id != @editor.id
end

#editing_a_flagged_and_hidden_post? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/post_revisor.rb', line 555

def editing_a_flagged_and_hidden_post?
  self_edit? && @post.hidden &&
    @post.hidden_reason_id == Post.hidden_reasons[:flag_threshold_reached]
end

#flagged? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/post_revisor.rb', line 373

def flagged?
  @post.is_flagged?
end

#force_new_version? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/post_revisor.rb', line 440

def force_new_version?
  @opts[:force_new_version] == true
end

#grace_period_edit? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/post_revisor.rb', line 418

def grace_period_edit?
  return false if (@revised_at - @last_version_at) > SiteSetting.editing_grace_period.to_i

  if new_raw = @fields[:raw]
    max_diff = SiteSetting.editing_grace_period_max_diff.to_i
    if @editor.staff? || (@editor.trust_level > 1)
      max_diff = SiteSetting.editing_grace_period_max_diff_high_trust.to_i
    end

    if (original_raw.size - new_raw.size).abs > max_diff ||
         diff_size(original_raw, new_raw) > max_diff
      return false
    end
  end

  true
end

#grant_badge ⇒ Object 



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# File 'lib/post_revisor.rb', line 750

def grant_badge
  BadgeGranter.queue_badge_grant(Badge::Trigger::PostRevision, post: @post)
end

#guardian ⇒ Object 



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# File 'lib/post_revisor.rb', line 758

def guardian
  @guardian ||= Guardian.new(@editor)
end

#is_last_post? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/post_revisor.rb', line 674

def is_last_post?
  !Post.where(topic_id: @topic.id).where("post_number > ?", @post.post_number).exists?
end

#only_hidden_tags_changed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/post_revisor.rb', line 661

def only_hidden_tags_changed?
  return false if (hidden_tag_names = DiscourseTagging.hidden_tag_names).blank?

  modifications = post_changes.merge(@topic_changes.diff)
  if modifications.keys.size == 1 && (tags_diff = modifications["tags"]).present?
    a, b = tags_diff[0] || [], tags_diff[1] || []
    changed_tags = ((a + b) - (a & b)).map(&:presence).compact
    return true if (changed_tags - hidden_tag_names).empty?
  end

  false
end

#original_cooked=(val) ⇒ Object 



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# File 'lib/post_revisor.rb', line 406

def original_cooked=(val)
  @cached_original_cooked = val
  Discourse.redis.setex(original_cooked_key, SiteSetting.editing_grace_period + 1, val)
end

#original_cooked_key ⇒ Object 



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# File 'lib/post_revisor.rb', line 385

def original_cooked_key
  "original_cooked_#{(@last_version_at.to_f * 1000).to_i}#{@post.id}"
end

#original_raw ⇒ Object 



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# File 'lib/post_revisor.rb', line 397

def original_raw
  cached_original_raw || @post.raw
end

#original_raw=(val) ⇒ Object 



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# File 'lib/post_revisor.rb', line 401

def original_raw=(val)
  @cached_original_raw = val
  Discourse.redis.setex(original_raw_key, SiteSetting.editing_grace_period + 1, val)
end

#original_raw_key ⇒ Object 



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# File 'lib/post_revisor.rb', line 381

def original_raw_key
  "original_raw_#{(@last_version_at.to_f * 1000).to_i}#{@post.id}"
end

#owner_changed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/post_revisor.rb', line 436

def owner_changed?
  @fields.has_key?(:user_id) && @fields[:user_id] != @post.user_id
end

#perform_edit ⇒ Object 



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# File 'lib/post_revisor.rb', line 639

def perform_edit
  return if bypass_rate_limiter?
  EditRateLimiter.new(@editor).performed!
end

#plugin_callbacks ⇒ Object 



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# File 'lib/post_revisor.rb', line 678

def plugin_callbacks
  DiscourseEvent.trigger(:before_edit_post, @post, @fields)
  DiscourseEvent.trigger(:validate_post, @post)
end

#post_changed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/post_revisor.rb', line 340

def post_changed?
  POST_TRACKED_FIELDS.each do |field|
    return true if @fields.has_key?(field) && @fields[field] != @post.public_send(field)
  end
  false
end

#post_changes ⇒ Object 



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# File 'lib/post_revisor.rb', line 631

def post_changes
  @post.previous_changes.slice(*POST_TRACKED_FIELDS)
end

#post_process_post ⇒ Object 



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# File 'lib/post_revisor.rb', line 713

def post_process_post
  @post.invalidate_oneboxes = true
  @post.trigger_post_process
  DiscourseEvent.trigger(:post_edited, @post, self.topic_changed?, self)
end

#publish_changes ⇒ Object 



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# File 'lib/post_revisor.rb', line 737

def publish_changes
  options =
    if !@topic_changes.diff.empty? && !@topic_changes.errored?
      { reload_topic: true }
    else
      {}
    end

  DiscourseEvent.trigger(:before_post_publish_changes, post_changes, @topic_changes, options)

  @post.publish_change_to_clients!(:revised, options)
end

#raw_changed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/post_revisor.rb', line 762

def raw_changed?
  @fields.has_key?(:raw) && @fields[:raw] != cached_original_raw && @post_successfully_saved
end

#remove_flags_and_unhide_post ⇒ Object 



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# File 'lib/post_revisor.rb', line 538

def remove_flags_and_unhide_post
  return if @opts[:deleting_post]
  return unless editing_a_flagged_and_hidden_post?

  flaggers = []
  @post
    .post_actions
    .where(post_action_type_id: PostActionType.flag_types_without_custom.values)
    .each do |action|
      flaggers << action.user if action.user
      action.remove_act!(Discourse.system_user)
    end

  @post.unhide!
  PostActionNotifier.after_post_unhide(@post, flaggers)
end

#reviewable_content_changed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/post_revisor.rb', line 771

def reviewable_content_changed?
  raw_changed? || topic_title_changed?
end

#revise ⇒ Object 



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# File 'lib/post_revisor.rb', line 455

def revise
  update_post
  update_topic if topic_changed?
  create_or_update_revision
  remove_flags_and_unhide_post
end

#revise!(editor, fields, opts = {}) ⇒ Object

AVAILABLE OPTIONS:

  • revised_at: changes the date of the revision

  • force_new_version: bypass grace period edit window

  • bypass_rate_limiter:

  • bypass_bump: do not bump the topic, even if last post

  • skip_validations: ask ActiveRecord to skip validations

  • skip_revision: do not create a new PostRevision record

  • skip_staff_log: skip creating an entry in the staff action log



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# File 'lib/post_revisor.rb', line 212

def revise!(editor, fields, opts = {})
  @editor = editor
  @fields = fields.with_indifferent_access
  @opts = opts

  @topic_changes = TopicChanges.new(@topic, editor)

  # some normalization
  @fields[:raw] = cleanup_whitespaces(@fields[:raw]) if @fields.has_key?(:raw)
  @fields[:user_id] = @fields[:user_id].to_i if @fields.has_key?(:user_id)
  @fields[:category_id] = @fields[:category_id].to_i if @fields.has_key?(:category_id)

  # always reset edit_reason unless provided, do not set to nil else
  # previous reasons are lost
  @fields.delete(:edit_reason) if @fields[:edit_reason].blank?

  Post.plugin_permitted_update_params.each do |field, val|
    val[:handler].call(@post, @fields[field]) if @fields.key?(field) && val[:plugin].enabled?
  end

  if !should_revise?
    # the draft sequence is advanced here to handle the edge case where a
    # user opens the composer to edit a post and makes some changes (which
    # saves a draft), but then un-does the changes and clicks save. In this
    # case, should_revise? returns false because nothing has really changed
    # in the post, but we want to get rid of the draft so we advance the
    # sequence.
    advance_draft_sequence if !opts[:keep_existing_draft]
    return false
  end

  @post.acting_user = @editor
  @topic.acting_user = @editor
  @revised_at = @opts[:revised_at] || Time.now
  @last_version_at = @post.last_version_at || Time.now

  if guardian.affected_by_slow_mode?(@topic) && !grace_period_edit? &&
       SiteSetting.slow_mode_prevents_editing
    @post.errors.add(:base, I18n.t("cannot_edit_on_slow_mode"))
    return false
  end

  @version_changed = false
  @post_successfully_saved = true

  @validate_post = true
  @validate_post = @opts[:validate_post] if @opts.has_key?(:validate_post)
  @validate_post = !@opts[:skip_validations] if @opts.has_key?(:skip_validations)

  @validate_topic = true
  @validate_topic = @opts[:validate_topic] if @opts.has_key?(:validate_topic)
  @validate_topic = !@opts[:skip_validations] if @opts.has_key?(:skip_validations)

  @skip_revision = false
  @skip_revision = @opts[:skip_revision] if @opts.has_key?(:skip_revision)

  @post.incoming_email&.update(imap_sync: true) if @post.incoming_email&.imap_uid

  old_raw = @post.raw

  Post.transaction do
    revise_post

    yield if block_given?
    # TODO: these callbacks are being called in a transaction
    # it is kind of odd, because the callback is called "before_edit"
    # but the post is already edited at this point
    # Trouble is that much of the logic of should I edit? is deeper
    # down so yanking this in front of the transaction will lead to
    # false positive.
    plugin_callbacks

    revise_topic
    advance_draft_sequence if !opts[:keep_existing_draft]
  end

  # Lock the post by default if the appropriate setting is true
  if (
       SiteSetting.staff_edit_locks_post? && !@post.wiki? && @fields.has_key?("raw") &&
         @editor.staff? && @editor != Discourse.system_user && !@post.user&.staff?
     )
    PostLocker.new(@post, @editor).lock
  end

  # We log staff/group moderator edits to posts
  if (
       (
         @editor.staff? ||
           (
             @post.is_category_description? &&
               guardian.can_edit_category_description?(@post.topic.category)
           )
       ) && @editor.id != @post.user_id && @fields.has_key?("raw") && !@opts[:skip_staff_log]
     )
    StaffActionLogger.new(@editor).log_post_edit(@post, old_raw: old_raw)
  end

  # WARNING: do not pull this into the transaction
  # it can fire events in sidekiq before the post is done saving
  # leading to corrupt state
  QuotedPost.extract_from(@post)

  # This must be done before post_process_post, because that uses
  # post upload security status to cook URLs.
  @post.update_uploads_secure_status(source: "post revisor")

  post_process_post

  update_topic_word_counts
  alert_users
  publish_changes
  grant_badge

  TopicLink.extract_from(@post)

  ReviewablePost.queue_for_review_if_possible(@post, @editor) if should_create_new_version?

  successfully_saved_post_and_topic
end

#revise_and_create_new_version ⇒ Object 



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# File 'lib/post_revisor.rb', line 444

def revise_and_create_new_version
  @version_changed = true
  @post.version += 1
  @post.public_version += 1
  @post.last_version_at = @revised_at

  revise
  perform_edit
  bump_topic
end

#revise_post ⇒ Object 



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# File 'lib/post_revisor.rb', line 351

def revise_post
  if should_create_new_version?
    revise_and_create_new_version
  else
    unless cached_original_raw
      self.original_raw = @post.raw
      self.original_cooked = @post.cooked
    end
    revise
  end
end

#revise_topic ⇒ Object 



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# File 'lib/post_revisor.rb', line 683

def revise_topic
  return unless @post.is_first_post?

  update_topic_excerpt
  update_category_description
end

#self_edit? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/post_revisor.rb', line 534

def self_edit?
  @editor == @post.user
end

#should_create_new_version? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/post_revisor.rb', line 363

def should_create_new_version?
  return false if @skip_revision
  edited_by_another_user? || flagged? || !grace_period_edit? || owner_changed? ||
    force_new_version? || edit_reason_specified?
end

#should_revise? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/post_revisor.rb', line 336

def should_revise?
  post_changed? || topic_changed?
end

#successfully_saved_post_and_topic ⇒ Object 



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# File 'lib/post_revisor.rb', line 754

def successfully_saved_post_and_topic
  @post_successfully_saved && !@topic_changes.errored?
end

#topic_changed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/post_revisor.rb', line 347

def topic_changed?
  PostRevisor.tracked_topic_fields.keys.any? { |f| @fields.has_key?(f) }
end

#topic_diff ⇒ Object 



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# File 'lib/post_revisor.rb', line 635

def topic_diff
  @topic_changes.diff
end

#topic_title_changed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/post_revisor.rb', line 766

def topic_title_changed?
  topic_changed? && @fields.has_key?(:title) && topic_diff.has_key?(:title) &&
    !@topic_changes.errored?
end

#update_category_description ⇒ Object 



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# File 'lib/post_revisor.rb', line 694

def update_category_description
  return unless category = Category.find_by(topic_id: @topic.id)

  doc = Nokogiri::HTML5.fragment(@post.cooked)
  doc.css("img").remove

  if html = doc.css("p").first&.inner_html&.strip
    new_description = html unless html.starts_with?(Category.post_template[0..50])
    category.update_column(:description, new_description)
    @category_changed = category
  else
    @post.errors.add(:base, I18n.t("category.errors.description_incomplete"))
  end
end

#update_post ⇒ Object 



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# File 'lib/post_revisor.rb', line 464

def update_post
  if @fields.has_key?("user_id") && @fields["user_id"] != @post.user_id && @post.user_id != nil
    prev_owner = User.find(@post.user_id)
    new_owner = User.find(@fields["user_id"])

    UserAction
      .where(target_post_id: @post.id)
      .where(user_id: prev_owner.id)
      .where(action_type: USER_ACTIONS_TO_REMOVE)
      .update_all(user_id: new_owner.id)

    if @post.post_number == 1
      UserAction
        .where(target_topic_id: @post.topic_id)
        .where(user_id: prev_owner.id)
        .where(action_type: UserAction::NEW_TOPIC)
        .update_all(user_id: new_owner.id)
    end
  end

  POST_TRACKED_FIELDS.each do |field|
    @post.public_send("#{field}=", @fields[field]) if @fields.has_key?(field)
  end

  @post.edit_reason = @fields[:edit_reason] if should_create_new_version?
  @post.last_editor_id = @editor.id
  @post.word_count = @fields[:raw].scan(/[[:word:]]+/).size if @fields.has_key?(:raw)
  @post.self_edits += 1 if self_edit?

  @post.extract_quoted_post_numbers

  @post_successfully_saved = @post.save(validate: @validate_post)
  @post.link_post_uploads
  @post.save_reply_relationships

  @editor.increment_post_edits_count if @post_successfully_saved

  # post owner changed
  if prev_owner && new_owner && prev_owner != new_owner
    likes =
      UserAction
        .where(target_post_id: @post.id)
        .where(user_id: prev_owner.id)
        .where(action_type: UserAction::WAS_LIKED)
        .update_all(user_id: new_owner.id)

    private_message = @topic.private_message?

    prev_owner_user_stat = prev_owner.user_stat

    unless private_message
      UserStatCountUpdater.decrement!(@post, user_stat: prev_owner_user_stat) if !@post.trashed?
      prev_owner_user_stat.likes_received -= likes
    end

    if @post.created_at == prev_owner.user_stat.first_post_created_at
      prev_owner_user_stat.update!(
        first_post_created_at: prev_owner.posts.order("created_at ASC").first.try(:created_at),
      )
    end

    new_owner_user_stat = new_owner.user_stat
    unless private_message
      UserStatCountUpdater.increment!(@post, user_stat: new_owner_user_stat) if !@post.trashed?
      new_owner_user_stat.likes_received += likes
    end
    new_owner_user_stat.save!
  end
end

#update_revision ⇒ Object 



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# File 'lib/post_revisor.rb', line 600

def update_revision
  return unless revision = PostRevision.find_by(post_id: @post.id, number: @post.version)
  revision.user_id = @post.last_editor_id
  modifications = post_changes.merge(@topic_changes.diff)

  modifications.each_key do |field|
    if revision.modifications.has_key?(field)
      old_value = revision.modifications[field][0]
      new_value = modifications[field][1]
      if old_value.to_s != new_value.to_s
        revision.modifications[field] = [old_value, new_value]
      else
        revision.modifications.delete(field)
      end
    else
      revision.modifications[field] = modifications[field]
    end
  end
  # should probably do this before saving the post!
  if revision.modifications.empty?
    revision.destroy
    @post.last_editor_id =
      PostRevision.where(post_id: @post.id).order(number: :desc).pick(:user_id) || @post.user_id
    @post.version -= 1
    @post.public_version -= 1
    @post.save(validate: @validate_post)
  else
    revision.save
  end
end

#update_topic ⇒ Object 



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# File 'lib/post_revisor.rb', line 560

def update_topic
  Topic.transaction do
    PostRevisor.tracked_topic_fields.each do |f, cb|
      if !@topic_changes.errored? && @fields.has_key?(f)
        cb.call(@topic_changes, @fields[f], @fields)
      end
    end

    unless @topic_changes.errored?
      @topic_changes.check_result(@topic.save(validate: @validate_topic))
    end
  end
end

#update_topic_excerpt ⇒ Object 



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# File 'lib/post_revisor.rb', line 690

def update_topic_excerpt
  @topic.update_excerpt(@post.excerpt_for_topic)
end

#update_topic_word_counts ⇒ Object 



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# File 'lib/post_revisor.rb', line 719

def update_topic_word_counts
  DB.exec(
    "UPDATE topics
                  SET word_count = (
                    SELECT SUM(COALESCE(posts.word_count, 0))
                    FROM posts
                    WHERE posts.topic_id = :topic_id
                  )
                  WHERE topics.id = :topic_id",
    topic_id: @topic.id,
  )
end