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mastodon/app/controllers/statuses_controller.rb

157 lines
4.5 KiB

# frozen_string_literal: true
class StatusesController < ApplicationController
include SignatureAuthentication
include Authorization
ANCESTORS_LIMIT = 20
DESCENDANTS_LIMIT = 20
DESCENDANTS_DEPTH_LIMIT = 4
layout 'public'
before_action :set_account
before_action :set_status
before_action :set_link_headers
before_action :check_account_suspension
before_action :redirect_to_original, only: [:show]
before_action :set_referrer_policy_header, only: [:show]
before_action :set_cache_headers
def show
respond_to do |format|
format.html do
set_ancestors
set_descendants
render 'stream_entries/show'
end
format.json do
skip_session! unless @stream_entry.hidden?
render_cached_json(['activitypub', 'note', @status.cache_key], content_type: 'application/activity+json', public: !@stream_entry.hidden?) do
ActiveModelSerializers::SerializableResource.new(@status, serializer: ActivityPub::NoteSerializer, adapter: ActivityPub::Adapter)
end
end
end
end
def activity
skip_session!
render_cached_json(['activitypub', 'activity', @status.cache_key], content_type: 'application/activity+json', public: !@stream_entry.hidden?) do
ActiveModelSerializers::SerializableResource.new(@status, serializer: ActivityPub::ActivitySerializer, adapter: ActivityPub::Adapter)
end
end
def embed
response.headers['X-Frame-Options'] = 'ALLOWALL'
render 'stream_entries/embed', layout: 'embedded'
end
private
def create_descendant_thread(depth, statuses)
if depth < DESCENDANTS_DEPTH_LIMIT
{ statuses: statuses }
else
next_status = statuses.pop
{ statuses: statuses, next_status: next_status }
end
end
def set_account
@account = Account.find_local!(params[:account_username])
end
def set_ancestors
@ancestors = @status.reply? ? cache_collection(@status.ancestors(ANCESTORS_LIMIT, current_account), Status) : []
@next_ancestor = @ancestors.size < ANCESTORS_LIMIT ? nil : @ancestors.shift
end
def set_descendants
@max_descendant_thread_id = params[:max_descendant_thread_id]&.to_i
@since_descendant_thread_id = params[:since_descendant_thread_id]&.to_i
descendants = cache_collection(
@status.descendants(
DESCENDANTS_LIMIT,
current_account,
@max_descendant_thread_id,
@since_descendant_thread_id,
DESCENDANTS_DEPTH_LIMIT
),
Status
)
@descendant_threads = []
if descendants.present?
statuses = [descendants.first]
depth = 1
descendants.drop(1).each_with_index do |descendant, index|
if descendants[index].id == descendant.in_reply_to_id
depth += 1
statuses << descendant
else
@descendant_threads << create_descendant_thread(depth, statuses)
@descendant_threads.reverse_each do |descendant_thread|
statuses = descendant_thread[:statuses]
index = statuses.find_index do |thread_status|
thread_status.id == descendant.in_reply_to_id
end
if index.present?
depth += index - statuses.size
break
end
depth -= statuses.size
end
statuses = [descendant]
end
end
@descendant_threads << create_descendant_thread(depth, statuses)
end
@max_descendant_thread_id = @descendant_threads.pop[:statuses].first.id if descendants.size >= DESCENDANTS_LIMIT
end
def set_link_headers
response.headers['Link'] = LinkHeader.new(
[
[account_stream_entry_url(@account, @status.stream_entry, format: 'atom'), [%w(rel alternate), %w(type application/atom+xml)]],
[ActivityPub::TagManager.instance.uri_for(@status), [%w(rel alternate), %w(type application/activity+json)]],
]
)
end
def set_status
@status = @account.statuses.find(params[:id])
@stream_entry = @status.stream_entry
@type = @stream_entry.activity_type.downcase
authorize @status, :show?
rescue Mastodon::NotPermittedError
# Reraise in order to get a 404
raise ActiveRecord::RecordNotFound
end
def check_account_suspension
gone if @account.suspended?
end
def redirect_to_original
redirect_to ::TagManager.instance.url_for(@status.reblog) if @status.reblog?
end
def set_referrer_policy_header
return if @status.public_visibility? || @status.unlisted_visibility?
response.headers['Referrer-Policy'] = 'origin'
end
end