Added extension functionality

lib/extensions/toggle-check.ts

@@ -0,0 +1,40 @@
+import { createServiceClient } from '@/lib/supabase/server'
+
+/**
+ * Check if an extension is enabled for a specific user.
+ * Used by event handlers to gate execution.
+ *
+ * For backward compatibility during the transition period,
+ * general extensions that were previously always-on default to
+ * enabled when no toggle row exists.
+ */
+const LEGACY_GENERAL_EXTENSIONS = [
+  'receipt-ocr',
+  'ai-categorization',
+  'ai-chat',
+  'push-notifications',
+  'enable-banking',
+]
+
+export async function isExtensionEnabled(
+  userId: string,
+  sectorSlug: string,
+  extensionSlug: string
+): Promise<boolean> {
+  const supabase = await createServiceClient()
+
+  const { data } = await supabase
+    .from('extension_toggles')
+    .select('enabled')
+    .eq('user_id', userId)
+    .eq('sector_slug', sectorSlug)
+    .eq('extension_slug', extensionSlug)
+    .single()
+
+  // If no toggle row exists, check if this is a legacy extension
+  if (!data) {
+    return sectorSlug === 'general' && LEGACY_GENERAL_EXTENSIONS.includes(extensionSlug)
+  }
+
+  return data.enabled
+}