Change ActivityPub paging to match spec. Clean up ActivityPub outbox changes. (#2410)

* Change ActivityPub paging to match spec. Clean up ActivityPub outbox changes.

* Fix code style and test failures for OutboxController.

* Attempt to fix CI errors.

3 files changed, 43 insertions, 19 deletions

diff --git a/app/controllers/api/activitypub/activities_controller.rb b/app/controllers/api/activitypub/activities_controller.rb
index 03f27c7f6..ba03738fc 100644
--- a/app/controllers/api/activitypub/activities_controller.rb
+++ b/app/controllers/api/activitypub/activities_controller.rb
@@ -8,8 +8,6 @@ class Api::Activitypub::ActivitiesController < ApiController
 
   # Show a status in AS2 format, as either an Announce (reblog) or a Create (post) activity.
   def show_status
-    headers['Access-Control-Allow-Origin'] = '*'
-
     return forbidden unless @status.permitted?
 
     if @status.reblog?
diff --git a/app/controllers/api/activitypub/notes_controller.rb b/app/controllers/api/activitypub/notes_controller.rb
index 722961ec6..6489243dc 100644
--- a/app/controllers/api/activitypub/notes_controller.rb
+++ b/app/controllers/api/activitypub/notes_controller.rb
@@ -6,8 +6,6 @@ class Api::Activitypub::NotesController < ApiController
   respond_to :activitystreams2
 
   def show
-    headers['Access-Control-Allow-Origin'] = '*'
-
     forbidden unless @status.permitted?
   end
 
diff --git a/app/controllers/api/activitypub/outbox_controller.rb b/app/controllers/api/activitypub/outbox_controller.rb
index 05d779910..7b6cbdd38 100644
--- a/app/controllers/api/activitypub/outbox_controller.rb
+++ b/app/controllers/api/activitypub/outbox_controller.rb
@@ -6,30 +6,47 @@ class Api::Activitypub::OutboxController < ApiController
   respond_to :activitystreams2
 
   def show
-    headers['Access-Control-Allow-Origin'] = '*'
+    if params[:max_id] || params[:since_id]
+      show_outbox_page
+    else
+      show_base_outbox
+    end
+  end
+
+  private
 
-    @statuses = Status.as_outbox_timeline(@account).paginate_by_max_id(limit_param(DEFAULT_STATUSES_LIMIT), params[:max_id], params[:since_id])
+  def show_base_outbox
+    @statuses = Status.as_outbox_timeline(@account)
     @statuses = cache_collection(@statuses)
 
     set_maps(@statuses)
 
-    # Since the statuses are in reverse chronological order, last is the lowest ID.
-    @next_path = api_activitypub_outbox_url(max_id: @statuses.last.id) if @statuses.size == limit_param(DEFAULT_STATUSES_LIMIT)
+    set_first_last_page(@statuses)
 
-    unless @statuses.empty?
-      if @statuses.first.id == 1
-        @prev_path = api_activitypub_outbox_url
-      elsif params[:max_id]
-        @prev_path = api_activitypub_outbox_url(since_id: @statuses.first.id)
-      end
-    end
+    render :show
+  end
 
-    @paginated = @next_path || @prev_path
+  def show_outbox_page
+    all_statuses = Status.as_outbox_timeline(@account)
+    @statuses = all_statuses.paginate_by_max_id(limit_param(DEFAULT_STATUSES_LIMIT), params[:max_id], params[:since_id])
 
-    set_pagination_headers(@next_path, @prev_path)
-  end
+    all_statuses = cache_collection(all_statuses)
+    @statuses = cache_collection(@statuses)
 
-  private
+    set_maps(@statuses)
+
+    set_first_last_page(all_statuses)
+
+    @next_page_url = api_activitypub_outbox_url(pagination_params(max_id: @statuses.last.id))    unless @statuses.empty?
+    @prev_page_url = api_activitypub_outbox_url(pagination_params(since_id: @statuses.first.id)) unless @statuses.empty?
+
+    @paginated = @next_page_url || @prev_page_url
+    @part_of_url = api_activitypub_outbox_url
+
+    set_pagination_headers(@next_page_url, @prev_page_url)
+
+    render :show_page
+  end
 
   def cache_collection(raw)
     super(raw, Status)
@@ -38,4 +55,15 @@ class Api::Activitypub::OutboxController < ApiController
   def set_account
     @account = Account.find(params[:id])
   end
+
+  def set_first_last_page(statuses) # rubocop:disable Style/AccessorMethodName
+    return if statuses.empty?
+
+    @first_page_url = api_activitypub_outbox_url(max_id: statuses.first.id + 1)
+    @last_page_url = api_activitypub_outbox_url(since_id: statuses.last.id - 1)
+  end
+
+  def pagination_params(core_params)
+    params.permit(:local, :limit).merge(core_params)
+  end
 end