Initial commit

app/Http/Controllers/Admin/BillingController.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Http\Controllers\Admin;
+
+use App\Http\Controllers\Controller;
+use Illuminate\Http\Request;
+use App\Models\BillingAccount;
+
+class BillingController extends Controller
+{
+    public function checkEmail(Request $request)
+    {
+        $request->validate([
+            'email' => 'required|email',
+        ]);
+
+        $billing = BillingAccount::where('invoice_email', $request->email)->first();
+
+        if ($billing) {
+            return response()->json([
+                'exists' => true,
+                'billing_account_id' => $billing->id,
+                'billing_name' => $billing->name,
+                'primary_parent_user_id' => $billing->primary_parent_user_id,
+            ]);
+        }
+
+        return response()->json([
+            'exists' => false,
+        ]);
+    }
+}