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