Change logged out /api/v1/statuses/:id/context logged out limits (#20355)

app/controllers/api/v1/statuses_controller.rb

@@ -18,14 +18,29 @@ class Api::V1::StatusesController < Api::BaseController
   # than this anyway
   CONTEXT_LIMIT = 4_096
 
+  # This remains expensive and we don't want to show everything to logged-out users
+  ANCESTORS_LIMIT         = 40
+  DESCENDANTS_LIMIT       = 60
+  DESCENDANTS_DEPTH_LIMIT = 20
+
   def show
     @status = cache_collection([@status], Status).first
     render json: @status, serializer: REST::StatusSerializer
   end
 
   def context
-    ancestors_results   = @status.in_reply_to_id.nil? ? [] : @status.ancestors(CONTEXT_LIMIT, current_account)
-    descendants_results = @status.descendants(CONTEXT_LIMIT, current_account)
+    ancestors_limit         = CONTEXT_LIMIT
+    descendants_limit       = CONTEXT_LIMIT
+    descendants_depth_limit = nil
+
+    if current_account.nil?
+      ancestors_limit         = ANCESTORS_LIMIT
+      descendants_limit       = DESCENDANTS_LIMIT
+      descendants_depth_limit = DESCENDANTS_DEPTH_LIMIT
+    end
+
+    ancestors_results   = @status.in_reply_to_id.nil? ? [] : @status.ancestors(ancestors_limit, current_account)
+    descendants_results = @status.descendants(descendants_limit, current_account, nil, nil, descendants_depth_limit)
     loaded_ancestors    = cache_collection(ancestors_results, Status)
     loaded_descendants  = cache_collection(descendants_results, Status)