discourse/app/controllers/posts_controller.rb

314 lines
8.7 KiB
Ruby

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 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