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|
# frozen_string_literal: true
class StatusesController < ApplicationController
include SignatureAuthentication
include Authorization
ANCESTORS_LIMIT = 40
DESCENDANTS_LIMIT = 60
DESCENDANTS_DEPTH_LIMIT = 20
layout 'public'
before_action :set_account
before_action :set_status
before_action :set_instance_presenter
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
before_action :set_replies, only: [:replies]
content_security_policy only: :embed do |p|
p.frame_ancestors(false)
end
def show
respond_to do |format|
format.html do
expires_in 10.seconds, public: true if current_account.nil?
@body_classes = 'with-modals'
set_ancestors
set_descendants
end
format.json do
render_cached_json(['activitypub', 'note', @status], content_type: 'application/activity+json', public: @status.distributable?) do
ActiveModelSerializers::SerializableResource.new(@status, serializer: ActivityPub::NoteSerializer, adapter: ActivityPub::Adapter)
end
end
end
end
def activity
render_cached_json(['activitypub', 'activity', @status], content_type: 'application/activity+json', public: @status.distributable?) do
ActiveModelSerializers::SerializableResource.new(@status, serializer: ActivityPub::ActivitySerializer, adapter: ActivityPub::Adapter)
end
end
def embed
raise ActiveRecord::RecordNotFound if @status.hidden?
expires_in 180, public: true
response.headers['X-Frame-Options'] = 'ALLOWALL'
@autoplay = ActiveModel::Type::Boolean.new.cast(params[:autoplay])
render layout: 'embedded'
end
def replies
render json: replies_collection_presenter,
serializer: ActivityPub::CollectionSerializer,
adapter: ActivityPub::Adapter,
content_type: 'application/activity+json',
skip_activities: true
end
private
def replies_collection_presenter
page = ActivityPub::CollectionPresenter.new(
id: replies_account_status_url(@account, @status, page_params),
type: :unordered,
part_of: replies_account_status_url(@account, @status),
next: next_page,
items: @replies.map { |status| status.local ? status : status.id }
)
if page_requested?
page
else
ActivityPub::CollectionPresenter.new(
id: replies_account_status_url(@account, @status),
type: :unordered,
first: page
)
end
end
def create_descendant_thread(starting_depth, statuses)
depth = starting_depth + statuses.size
if depth < DESCENDANTS_DEPTH_LIMIT
{
statuses: statuses,
starting_depth: starting_depth,
}
else
next_status = statuses.pop
{
statuses: statuses,
starting_depth: starting_depth,
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]
starting_depth = 0
descendants.drop(1).each_with_index do |descendant, index|
if descendants[index].id == descendant.in_reply_to_id
statuses << descendant
else
@descendant_threads << create_descendant_thread(starting_depth, statuses)
# The thread is broken, assume it's a reply to the root status
starting_depth = 0
# ... unless we can find its ancestor in one of the already-processed threads
@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?
starting_depth = descendant_thread[:starting_depth] + index + 1
break
end
end
statuses = [descendant]
end
end
@descendant_threads << create_descendant_thread(starting_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([[ActivityPub::TagManager.instance.uri_for(@status), [%w(rel alternate), %w(type application/activity+json)]]])
end
def set_status
@status = @account.statuses.find(params[:id])
authorize @status, :show?
rescue Mastodon::NotPermittedError
raise ActiveRecord::RecordNotFound
end
def set_instance_presenter
@instance_presenter = InstancePresenter.new
end
def check_account_suspension
gone if @account.suspended?
end
def redirect_to_original
redirect_to ActivityPub::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
def page_requested?
params[:page] == 'true'
end
def set_replies
@replies = page_params[:other_accounts] ? Status.where.not(account_id: @account.id) : @account.statuses
@replies = @replies.where(in_reply_to_id: @status.id, visibility: [:public, :unlisted])
@replies = @replies.paginate_by_min_id(DESCENDANTS_LIMIT, params[:min_id])
end
def next_page
last_reply = @replies.last
return if last_reply.nil?
same_account = last_reply.account_id == @account.id
return unless same_account || @replies.size == DESCENDANTS_LIMIT
same_account = false unless @replies.size == DESCENDANTS_LIMIT
replies_account_status_url(@account, @status, page: true, min_id: last_reply.id, other_accounts: !same_account)
end
def page_params
{ page: true, other_accounts: params[:other_accounts], min_id: params[:min_id] }.compact
end
end
|
