require_dependency 'post_creator' require_dependency 'post_destroyer' require_dependency 'distributed_memoizer' class PostsController < ApplicationController # Need to be logged in for all actions here before_filter :ensure_logged_in, except: [:show, :replies, :by_number, :short_link, :reply_history, :revisions, :expand_embed, :markdown] skip_before_filter :store_incoming_links, only: [:short_link] skip_before_filter :check_xhr, only: [:markdown,:short_link] def markdown post = Post.find_by(topic_id: params[:topic_id].to_i, post_number: (params[:post_number] || 1).to_i) if post && guardian.can_see?(post) render text: post.raw, content_type: 'text/plain' else raise Discourse::NotFound end end def short_link post = Post.find(params[:post_id].to_i) IncomingLink.add(request,current_user) redirect_to post.url end def create params = create_params key = params_key(params) error_json = nil payload = DistributedMemoizer.memoize(key, 120) do post_creator = PostCreator.new(current_user, params) post = post_creator.create if post_creator.errors.present? # If the post was spam, flag all the user's posts as spam current_user.flag_linked_posts_as_spam if post_creator.spam? error_json = MultiJson.dump(errors: post_creator.errors.full_messages) raise Discourse::InvalidPost else post_serializer = PostSerializer.new(post, scope: guardian, root: false) post_serializer.topic_slug = post.topic.slug if post.topic.present? post_serializer.draft_sequence = DraftSequence.current(current_user, post.topic.draft_key) MultiJson.dump(post_serializer) end end render json: payload rescue Discourse::InvalidPost render json: error_json, status: 422 end def update params.require(:post) post = Post.where(id: params[:id]) post = post.with_deleted if guardian.is_staff? post = post.first post.image_sizes = params[:image_sizes] if params[:image_sizes].present? if too_late_to(:edit, post) render json: {errors: [I18n.t('too_late_to_edit')]}, status: 422 return end guardian.ensure_can_edit!(post) # to stay consistent with the create api, # we should allow for title changes and category changes here # we should also move all of this to a post updater. if post.post_number == 1 && (params[:title] || params[:post][:category]) post.topic.acting_user = current_user post.topic.title = params[:title] if params[:title] Topic.transaction do post.topic.change_category(params[:post][:category]) post.topic.save end if post.topic.errors.present? render_json_error(post.topic) return end end revisor = PostRevisor.new(post) if revisor.revise!(current_user, params[:post][:raw], edit_reason: params[:post][:edit_reason]) TopicLink.extract_from(post) end if post.errors.present? render_json_error(post) return end post_serializer = PostSerializer.new(post, scope: guardian, root: false) post_serializer.draft_sequence = DraftSequence.current(current_user, post.topic.draft_key) link_counts = TopicLink.counts_for(guardian,post.topic, [post]) post_serializer.single_post_link_counts = link_counts[post.id] if link_counts.present? post_serializer.topic_slug = post.topic.slug if post.topic.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 def show post = find_post_from_params display_post(post) end def by_number post = find_post_from_params_by_number display_post(post) end def remove_bookmark_by_number if current_user post = find_post_from_params_by_number PostAction.remove_act(current_user, post, PostActionType.types[:bookmark]) end render nothing: true end def reply_history post = find_post_from_params render_serialized(post.reply_history, PostSerializer) end def destroy post = find_post_from_params if too_late_to(:delete_post, post) render json: {errors: [I18n.t('too_late_to_edit')]}, status: 422 return end guardian.ensure_can_delete!(post) destroyer = PostDestroyer.new(current_user, post) destroyer.destroy render nothing: true end def expand_embed render json: {cooked: TopicEmbed.expanded_for(find_post_from_params) } rescue render_json_error I18n.t('errors.embed.load_from_remote') end def recover post = find_post_from_params guardian.ensure_can_recover_post!(post) destroyer = PostDestroyer.new(current_user, post) destroyer.recover post.reload render_post_json(post) end def destroy_many params.require(:post_ids) posts = Post.where(id: post_ids_including_replies) 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 {|p| PostDestroyer.new(current_user, p).destroy } end render nothing: true end # Direct replies to this post def replies post = find_post_from_params render_serialized(post.replies, PostSerializer) end def 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 def bookmark post = find_post_from_params if current_user if params[:bookmarked] == "true" PostAction.act(current_user, post, PostActionType.types[:bookmark]) else PostAction.remove_act(current_user, post, PostActionType.types[:bookmark]) end end render nothing: true end def wiki guardian.ensure_can_wiki! post = find_post_from_params post.wiki = params[:wiki] post.version += 1 post.save render nothing: true end protected def find_post_revision_from_params 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) post_revision.post = find_post_from_params guardian.ensure_can_see!(post_revision) post_revision end def render_post_json(post) post_serializer = PostSerializer.new(post, scope: guardian, root: false) post_serializer.add_raw = true post_serializer.topic_slug = post.topic.slug if post.topic.present? counts = PostAction.counts_for([post], current_user) if counts && counts = counts[post.id] post_serializer.post_actions = counts end render_json_dump(post_serializer) end private def params_key(params) "post##" << Digest::SHA1.hexdigest(params .to_a .concat([["user", current_user.id]]) .sort{|x,y| x[0] <=> y[0]}.join do |x,y| "#{x}:#{y}" end) end def create_params permitted = [ :raw, :topic_id, :title, :archetype, :category, :target_usernames, :reply_to_post_number, :auto_close_time, :auto_track ] # param munging for WordPress params[:auto_track] = !(params[:auto_track].to_s == "false") if params[:auto_track] if api_key_valid? # php seems to be sending this incorrectly, don't fight with it params[:skip_validations] = params[:skip_validations].to_s == "true" permitted << :skip_validations # We allow `embed_url` via the API permitted << :embed_url end params.require(:raw) params.permit(*permitted).tap do |whitelisted| whitelisted[:image_sizes] = params[:image_sizes] # TODO this does not feel right, we should name what meta_data is allowed whitelisted[:meta_data] = params[:meta_data] end end def too_late_to(action, post) !guardian.send("can_#{action}?", post) && post.user_id == current_user.id && post.edit_time_limit_expired? end def display_post(post) post.revert_to(params[:version].to_i) if params[:version].present? render_post_json(post) end def find_post_from_params by_id_finder = Post.where(id: params[:id] || params[:post_id]) find_post_using(by_id_finder) end def find_post_from_params_by_number by_number_finder = Post.where(topic_id: params[:topic_id], post_number: params[:post_number]) find_post_using(by_number_finder) end def find_post_using(finder) # Include deleted posts if the user is staff finder = finder.with_deleted if current_user.try(:staff?) post = finder.first # load deleted topic post.topic = Topic.with_deleted.find(post.topic_id) if current_user.try(:staff?) guardian.ensure_can_see!(post) post end end