Class: PostsController

Inherits:
ApplicationController show all
Defined in:
app/controllers/posts_controller.rb

Constant Summary collapse

DELETED_POSTS_MAX_LIMIT = 
100

Constants inherited from ApplicationController

ApplicationController::LEGACY_NO_THEMES, ApplicationController::LEGACY_NO_UNOFFICIAL_PLUGINS, ApplicationController::NO_PLUGINS, ApplicationController::NO_THEMES, ApplicationController::NO_UNOFFICIAL_PLUGINS, ApplicationController::SAFE_MODE

Constants included from CanonicalURL::ControllerExtensions

CanonicalURL::ControllerExtensions::ALLOWED_CANONICAL_PARAMS

Instance Attribute Summary

Attributes inherited from ApplicationController

#theme_id

Instance Method Summary collapse

Methods inherited from ApplicationController

#application_layout, #can_cache_content?, #clear_notifications, #conditionally_allow_site_embedding, #current_homepage, #discourse_expires_in, #dont_cache_page, #ember_cli_required?, #fetch_user_from_params, #guardian, #handle_permalink, #handle_theme, #handle_unverified_request, #has_escaped_fragment?, #immutable_for, #no_cookies, #perform_refresh_session, #post_ids_including_replies, #preload_json, #rate_limit_second_factor!, #redirect_with_client_support, #render_json_dump, #render_serialized, requires_plugin, #rescue_discourse_actions, #resolve_safe_mode, #secure_session, #serialize_data, #set_current_user_for_logs, #set_layout, #set_mobile_view, #set_mp_snapshot_fields, #show_browser_update?, #store_preloaded, #use_crawler_layout?, #with_resolved_locale

Methods included from VaryHeader

#ensure_vary_header

Methods included from ReadOnlyMixin

#add_readonly_header, #allowed_in_staff_writes_only_mode?, #block_if_readonly_mode, #check_readonly_mode, included, #staff_writes_only_mode?

Methods included from Hijack

#hijack

Methods included from GlobalPath

#cdn_path, #cdn_relative_path, #full_cdn_url, #path, #upload_cdn_path

Methods included from JsonError

#create_errors_json

Methods included from CanonicalURL::ControllerExtensions

#canonical_url, #default_canonical, included

Methods included from CurrentUser

#clear_current_user, #current_user, has_auth_cookie?, #is_api?, #is_user_api?, #log_off_user, #log_on_user, lookup_from_env, #refresh_session

Instance Method Details

#all_reply_ids ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 313

def all_reply_ids
  Discourse.deprecate("/posts/:id/reply-ids/all is deprecated.", drop_from: "3.0")

  post = find_post_from_params
  render json: post.reply_ids(guardian, only_replies_to_single_post: false).to_json
end

#by_date ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 291

def by_date
  post = find_post_from_params_by_date
  display_post(post)
end

#by_number ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 286

def by_number
  post = find_post_from_params_by_number
  display_post(post)
end

#cooked ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 159

def cooked
  render json: { cooked: find_post_from_params.cooked }
end

#create ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 185

def create
  manager_params = create_params
  manager_params[:first_post_checks] = !is_api?
  manager_params[:advance_draft] = !is_api?

  manager = NewPostManager.new(current_user, manager_params)

  json =
    if is_api?
      memoized_payload =
        DistributedMemoizer.memoize(signature_for(manager_params), 120) do
          MultiJson.dump(serialize_data(manager.perform, NewPostResultSerializer, root: false))
        end

      JSON.parse(memoized_payload)
    else
      serialize_data(manager.perform, NewPostResultSerializer, root: false)
    end

  backwards_compatible_json(json)
end

#deleted_posts ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 667

def deleted_posts
  params.permit(:offset, :limit)
  guardian.ensure_can_see_deleted_posts!

  user = fetch_user_from_params
  offset = [params[:offset].to_i, 0].max
  limit = fetch_limit_from_params(default: 60, max: DELETED_POSTS_MAX_LIMIT)

  posts = user_posts(guardian, user.id, offset: offset, limit: limit).where.not(deleted_at: nil)

  render_serialized(posts, AdminUserActionSerializer)
end

#destroy ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 320

def destroy
  post = find_post_from_params
  force_destroy = ActiveModel::Type::Boolean.new.cast(params[:force_destroy])

  if force_destroy
    if !guardian.can_permanently_delete?(post)
      return render_json_error post.cannot_permanently_delete_reason(current_user), status: 403
    end
  else
    guardian.ensure_can_delete!(post)
  end

  unless guardian.can_moderate_topic?(post.topic)
    RateLimiter.new(
      current_user,
      "delete_post_per_min",
      SiteSetting.max_post_deletions_per_minute,
      1.minute,
    ).performed!
    RateLimiter.new(
      current_user,
      "delete_post_per_day",
      SiteSetting.max_post_deletions_per_day,
      1.day,
    ).performed!
  end

  PostDestroyer.new(
    current_user,
    post,
    context: params[:context],
    force_destroy: force_destroy,
  ).destroy

  render body: nil
end

#destroy_bookmark ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 610

def destroy_bookmark
  params.require(:post_id)

  bookmark_id =
    Bookmark.where(
      bookmarkable_id: params[:post_id],
      bookmarkable_type: "Post",
      user_id: current_user.id,
    ).pick(:id)
  destroyed_bookmark = BookmarkManager.new(current_user).destroy(bookmark_id)

  render json:
           success_json.merge(BookmarkManager.bookmark_metadata(destroyed_bookmark, current_user))
end

#destroy_many ⇒ Object

Raises:



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# File 'app/controllers/posts_controller.rb', line 389

def destroy_many
  params.require(:post_ids)
  agree_with_first_reply_flag = (params[:agree_with_first_reply_flag] || true).to_s == "true"

  posts = Post.where(id: post_ids_including_replies).order(:id)
  raise Discourse::InvalidParameters.new(:post_ids) if posts.blank?

  # Make sure we can delete the posts
  posts.each { |p| guardian.ensure_can_delete!(p) }

  Post.transaction do
    posts.each_with_index do |p, i|
      PostDestroyer.new(
        current_user,
        p,
        defer_flags: !(agree_with_first_reply_flag && i == 0),
      ).destroy
    end
  end

  render body: nil
end

#expand_embed ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 357

def expand_embed
  render json: { cooked: TopicEmbed.expanded_for(find_post_from_params) }
rescue StandardError
  render_json_error I18n.t("errors.embed.load_from_remote")
end

#hide_revision ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 455

def hide_revision
  post_revision = find_post_revision_from_params
  guardian.ensure_can_hide_post_revision!(post_revision)

  post_revision.hide!

  post = find_post_from_params
  post.public_version -= 1
  post.save

  render body: nil
end

#latest ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 61

def latest
  params.permit(:before)
  last_post_id = params[:before].to_i
  last_post_id = Post.last.id if last_post_id <= 0

  if params[:id] == "private_posts"
    raise Discourse::NotFound if current_user.nil?
    posts =
      Post
        .private_posts
        .order(created_at: :desc)
        .where("posts.id <= ?", last_post_id)
        .where("posts.id > ?", last_post_id - 50)
        .includes(topic: :category)
        .includes(user: %i[primary_group flair_group])
        .includes(:reply_to_user)
        .limit(50)
    rss_description = I18n.t("rss_description.private_posts")
  else
    posts =
      Post
        .public_posts
        .visible
        .where(post_type: Post.types[:regular])
        .order(created_at: :desc)
        .where("posts.id <= ?", last_post_id)
        .where("posts.id > ?", last_post_id - 50)
        .includes(topic: :category)
        .includes(user: %i[primary_group flair_group])
        .includes(:reply_to_user)
        .limit(50)
    rss_description = I18n.t("rss_description.posts")
    @use_canonical = true
  end

  # Remove posts the user doesn't have permission to see
  # This isn't leaking any information we weren't already through the post ID numbers
  posts = posts.reject { |post| !guardian.can_see?(post) || post.topic.blank? }
  counts = PostAction.counts_for(posts, current_user)

  respond_to do |format|
    format.rss do
      @posts = posts
      @title = "#{SiteSetting.title} - #{rss_description}"
      @link = Discourse.base_url
      @description = rss_description
      render "posts/latest", formats: [:rss]
    end
    format.json do
      render_json_dump(
        serialize_data(
          posts,
          PostSerializer,
          scope: guardian,
          root: params[:id],
          add_raw: true,
          add_title: true,
          all_post_actions: counts,
        ),
      )
    end
  end
end

#latest_revision ⇒ Object

Raises:



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# File 'app/controllers/posts_controller.rb', line 445

def latest_revision
  post = find_post_from_params
  raise Discourse::NotFound if post.hidden && !guardian.can_view_hidden_post_revisions?

  post_revision = find_latest_post_revision_from_params
  post_revision_serializer =
    PostRevisionSerializer.new(post_revision, scope: guardian, root: false)
  render_json_dump(post_revision_serializer)
end

#locked ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 576

def locked
  post = find_post_from_params
  locker = PostLocker.new(post, current_user)
  params[:locked] === "true" ? locker.lock : locker.unlock
  render_json_dump(locked: post.locked?)
end

#markdown_id ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 32

def markdown_id
  markdown Post.find_by(id: params[:id].to_i)
end

#markdown_num ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 36

def markdown_num
  if params[:revision].present?
    post_revision = find_post_revision_from_topic_id
    render plain: post_revision.modifications[:raw].last
  elsif params[:post_number].present?
    markdown Post.find_by(
               topic_id: params[:topic_id].to_i,
               post_number: params[:post_number].to_i,
             )
  else
    opts = params.slice(:page)
    opts[:limit] = MARKDOWN_TOPIC_PAGE_SIZE
    topic_view = TopicView.new(params[:topic_id], current_user, opts)
    content = topic_view.posts.map { |p| <<~MD }
        #{p.user.username} | #{p.updated_at} | ##{p.post_number}

        #{p.raw}

        -------------------------

      MD
    render plain: content.join
  end
end

#merge_posts ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 412

def merge_posts
  params.require(:post_ids)
  posts = Post.where(id: params[:post_ids]).order(:id)
  raise Discourse::InvalidParameters.new(:post_ids) if posts.pluck(:id) == params[:post_ids]
  PostMerger.new(current_user, posts).merge
  render body: nil
rescue PostMerger::CannotMergeError => e
  render_json_error(e.message)
end

#notice ⇒ Object

Raises:



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# File 'app/controllers/posts_controller.rb', line 583

def notice
  post = find_post_from_params
  raise Discourse::NotFound unless guardian.can_edit_staff_notes?(post.topic)

  old_notice = post.custom_fields[Post::NOTICE]

  if params[:notice].present?
    post.custom_fields[Post::NOTICE] = {
      type: Post.notices[:custom],
      raw: params[:notice],
      cooked: PrettyText.cook(params[:notice], features: { onebox: false }),
    }
  else
    post.custom_fields.delete(Post::NOTICE)
  end

  post.save_custom_fields

  StaffActionLogger.new(current_user).log_post_staff_note(
    post,
    old_value: old_notice&.[]("raw"),
    new_value: params[:notice],
  )

  render body: nil
end

#pending ⇒ Object

Raises:



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# File 'app/controllers/posts_controller.rb', line 680

def pending
  params.require(:username)
  user = fetch_user_from_params
  raise Discourse::NotFound unless guardian.can_edit_user?(user)

  render_serialized(
    user.pending_posts.order(created_at: :desc),
    PendingPostSerializer,
    root: :pending_posts,
  )
end

#permanently_delete_revisions ⇒ Object

Raises:



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# File 'app/controllers/posts_controller.rb', line 468

def permanently_delete_revisions
  guardian.ensure_can_permanently_delete_post_revisions!

  post = find_post_from_params
  raise Discourse::InvalidParameters.new(:post) if post.blank?
  raise Discourse::NotFound unless post.revisions.present?

  RateLimiter.new(
    current_user,
    "admin_permanently_delete_post_revisions",
    20,
    1.minute,
    apply_limit_to_staff: true,
  ).performed!

  ActiveRecord::Base.transaction do
    updated_at = Time.zone.now
    post.revisions.destroy_all
    post.update(version: 1, public_version: 1, last_version_at: updated_at)
    StaffActionLogger.new(current_user).log_permanently_delete_post_revisions(post)
  end

  post.rebake!

  render body: nil
end

#post_type ⇒ Object

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# File 'app/controllers/posts_controller.rb', line 635

def post_type
  guardian.ensure_can_change_post_type!
  post = find_post_from_params
  params.require(:post_type)
  raise Discourse::InvalidParameters.new(:post_type) if Post.types[params[:post_type].to_i].blank?

  post.revise(current_user, post_type: params[:post_type].to_i)

  render body: nil
end

#raw_email ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 163

def raw_email
  params.require(:id)
  post = Post.unscoped.find(params[:id].to_i)
  guardian.ensure_can_view_raw_email!(post)
  text, html = Email.extract_parts(post.raw_email)
  render json: { raw_email: post.raw_email, text_part: text, html_part: html }
end

#rebake ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 646

def rebake
  guardian.ensure_can_rebake!

  post = find_post_from_params
  post.rebake!(invalidate_oneboxes: true, invalidate_broken_images: true)

  render body: nil
end

#recover ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 363

def recover
  post = find_post_from_params
  guardian.ensure_can_recover_post!(post)

  unless guardian.can_moderate_topic?(post.topic)
    RateLimiter.new(
      current_user,
      "delete_post_per_min",
      SiteSetting.max_post_deletions_per_minute,
      1.minute,
    ).performed!
    RateLimiter.new(
      current_user,
      "delete_post_per_day",
      SiteSetting.max_post_deletions_per_day,
      1.day,
    ).performed!
  end

  destroyer = PostDestroyer.new(current_user, post)
  destroyer.recover
  post.reload

  render_post_json(post)
end

#replies ⇒ Object

Direct replies to this post



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# File 'app/controllers/posts_controller.rb', line 423

def replies
  post = find_post_from_params
  replies = post.replies.secured(guardian)

  user_custom_fields = {}
  if (added_fields = User.allowed_user_custom_fields(guardian)).present?
    user_custom_fields = User.custom_fields_for_ids(replies.pluck(:user_id), added_fields)
  end

  render_serialized(replies, PostSerializer, user_custom_fields: user_custom_fields)
end

#reply_history ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 296

def reply_history
  post = find_post_from_params

  reply_history = post.reply_history(params[:max_replies].to_i, guardian)
  user_custom_fields = {}
  if (added_fields = User.allowed_user_custom_fields(guardian)).present?
    user_custom_fields = User.custom_fields_for_ids(reply_history.pluck(:user_id), added_fields)
  end

  render_serialized(reply_history, PostSerializer, user_custom_fields: user_custom_fields)
end

#reply_ids ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 308

def reply_ids
  post = find_post_from_params
  render json: post.reply_ids(guardian).to_json
end

#revert ⇒ Object

Raises:



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# File 'app/controllers/posts_controller.rb', line 508

def revert
  raise Discourse::NotFound unless guardian.is_staff?

  post_id = params[:id] || params[:post_id]
  revision = params[:revision].to_i
  raise Discourse::InvalidParameters.new(:revision) if revision < 2

  post_revision = PostRevision.find_by(post_id: post_id, number: revision)
  raise Discourse::NotFound unless post_revision

  post = find_post_from_params
  raise Discourse::NotFound if post.blank?

  post_revision.post = post
  guardian.ensure_can_see!(post_revision)
  guardian.ensure_can_edit!(post)
  if post_revision.modifications["raw"].blank? && post_revision.modifications["title"].blank? &&
       post_revision.modifications["category_id"].blank?
    return render_json_error(I18n.t("revert_version_same"))
  end

  topic = Topic.with_deleted.find(post.topic_id)

  changes = {}
  changes[:raw] = post_revision.modifications["raw"][0] if post_revision.modifications[
    "raw"
  ].present? && post_revision.modifications["raw"][0] != post.raw
  if post.is_first_post?
    changes[:title] = post_revision.modifications["title"][0] if post_revision.modifications[
      "title"
    ].present? && post_revision.modifications["title"][0] != topic.title
    changes[:category_id] = post_revision.modifications["category_id"][
      0
    ] if post_revision.modifications["category_id"].present? &&
      post_revision.modifications["category_id"][0] != topic.category.id
  end
  return render_json_error(I18n.t("revert_version_same")) if changes.length <= 0
  changes[:edit_reason] = I18n.with_locale(SiteSetting.default_locale) do
    I18n.t("reverted_to_version", version: post_revision.number.to_i - 1)
  end

  revisor = PostRevisor.new(post, topic)
  revisor.revise!(current_user, changes)

  return render_json_error(post) if post.errors.present?
  return render_json_error(topic) if topic.errors.present?

  post_serializer = PostSerializer.new(post, scope: guardian, root: false)
  post_serializer.draft_sequence = DraftSequence.current(current_user, topic.draft_key)

  link_counts = TopicLink.counts_for(guardian, topic, [post])
  post_serializer.single_post_link_counts = link_counts[post.id] if link_counts.present?

  result = { post: post_serializer.as_json }
  if post.is_first_post?
    result[:topic] = BasicTopicSerializer.new(
      topic,
      scope: guardian,
      root: false,
    ).as_json if post_revision.modifications["title"].present?
    result[:category_id] = post_revision.modifications["category_id"][
      0
    ] if post_revision.modifications["category_id"].present?
  end

  render_json_dump(result)
end

#revisions ⇒ Object

Raises:



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# File 'app/controllers/posts_controller.rb', line 435

def revisions
  post = find_post_from_params
  raise Discourse::NotFound if post.hidden && !guardian.can_view_hidden_post_revisions?

  post_revision = find_post_revision_from_params
  post_revision_serializer =
    PostRevisionSerializer.new(post_revision, scope: guardian, root: false)
  render_json_dump(post_revision_serializer)
end

#short_link ⇒ Object

Raises:



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# File 'app/controllers/posts_controller.rb', line 171

def short_link
  post = Post.find_by(id: params[:post_id].to_i)
  raise Discourse::NotFound unless post

  # Stuff the user in the request object, because that's what IncomingLink wants
  if params[:user_id]
    user = User.find_by(id: params[:user_id].to_i)
    request["u"] = user.username_lower if user
  end

  guardian.ensure_can_see!(post)
  redirect_to path(post.url)
end

#show ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 281

def show
  post = find_post_from_params
  display_post(post)
end

#show_revision ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 495

def show_revision
  post_revision = find_post_revision_from_params
  guardian.ensure_can_show_post_revision!(post_revision)

  post_revision.show!

  post = find_post_from_params
  post.public_version += 1
  post.save

  render body: nil
end

#unhide ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 655

def unhide
  post = find_post_from_params

  guardian.ensure_can_unhide!(post)

  post.unhide!

  render body: nil
end

#update ⇒ Object

Raises:



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# File 'app/controllers/posts_controller.rb', line 207

def update
  params.require(:post)

  post = Post.where(id: params[:id])
  post = post.with_deleted if guardian.is_staff?
  post = post.first

  raise Discourse::NotFound if post.blank?

  post.image_sizes = params[:image_sizes] if params[:image_sizes].present?

  if !guardian.public_send("can_edit?", post) && post.user_id == current_user.id &&
       post.edit_time_limit_expired?(current_user)
    return render_json_error(I18n.t("too_late_to_edit"))
  end

  guardian.ensure_can_edit!(post)

  changes = { raw: params[:post][:raw], edit_reason: params[:post][:edit_reason] }

  Post.plugin_permitted_update_params.keys.each { |param| changes[param] = params[:post][param] }

  raw_old = params[:post][:raw_old]
  if raw_old.present? && raw_old != post.raw
    return render_json_error(I18n.t("edit_conflict"), status: 409)
  end

  # to stay consistent with the create api, we allow for title & category changes here
  if post.is_first_post?
    changes[:title] = params[:title] if params[:title]
    changes[:category_id] = params[:post][:category_id] if params[:post][:category_id]

    if changes[:category_id] && changes[:category_id].to_i != post.topic.category_id.to_i
      category = Category.find_by(id: changes[:category_id])
      if category || (changes[:category_id].to_i == 0)
        guardian.ensure_can_move_topic_to_category!(category)
      else
        return render_json_error(I18n.t("category.errors.not_found"))
      end
    end
  end

  # We don't need to validate edits to small action posts by staff
  opts = {}
  if post.post_type == Post.types[:small_action] && current_user.staff?
    opts[:skip_validations] = true
  end

  topic = post.topic
  topic = Topic.with_deleted.find(post.topic_id) if guardian.is_staff?

  revisor = PostRevisor.new(post, topic)
  revisor.revise!(current_user, changes, opts)

  return render_json_error(post) if post.errors.present?
  return render_json_error(topic) if topic.errors.present?

  post_serializer = PostSerializer.new(post, scope: guardian, root: false, add_raw: true)
  post_serializer.draft_sequence = DraftSequence.current(current_user, topic.draft_key)
  link_counts = TopicLink.counts_for(guardian, topic, [post])
  post_serializer.single_post_link_counts = link_counts[post.id] if link_counts.present?

  result = { post: post_serializer.as_json }
  if revisor.category_changed.present?
    result[:category] = BasicCategorySerializer.new(
      revisor.category_changed,
      scope: guardian,
      root: false,
    ).as_json
  end

  render_json_dump(result)
end

#user_posts_feed ⇒ Object

Raises:



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# File 'app/controllers/posts_controller.rb', line 125

def user_posts_feed
  params.require(:username)
  user = fetch_user_from_params
  raise Discourse::NotFound unless guardian.can_see_profile?(user)

  posts =
    Post
      .public_posts
      .visible
      .where(user_id: user.id)
      .where(post_type: Post.types[:regular])
      .order(created_at: :desc)
      .includes(:user)
      .includes(topic: :category)
      .limit(50)

  posts = posts.reject { |post| !guardian.can_see?(post) || post.topic.blank? }

  respond_to do |format|
    format.rss do
      @posts = posts
      @title =
        "#{SiteSetting.title} - #{I18n.t("rss_description.user_posts", username: user.username)}"
      @link = "#{user.full_url}/activity"
      @description = I18n.t("rss_description.user_posts", username: user.username)
      render "posts/latest", formats: [:rss]
    end

    format.json do
      render_json_dump(serialize_data(posts, PostSerializer, scope: guardian, add_excerpt: true))
    end
  end
end

#wiki ⇒ Object 



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# File 'app/controllers/posts_controller.rb', line 625

def wiki
  post = find_post_from_params
  params.require(:wiki)
  guardian.ensure_can_wiki!(post)

  post.revise(current_user, wiki: params[:wiki])

  render body: nil
end