FIX_checkDuplicate in Enquiry

app/Config/Routes.php

@@ -94,6 +94,7 @@ $routes->group('api', ['filter' => 'appSignature'], function ($routes) {
     $routes->get('enquiry/getQuickQuoteEnquiryList', 'EnquiryController::getQuickQuoteEnquiryList');
     $routes->get('enquiry/updateEnquiryInProgress', 'EnquiryController::updateEnquiryInProgress');
     $routes->get('enquiry/updateEnquiryStatus', 'EnquiryController::updateEnquiryStatus');
+    $routes->get('enquiry/checkDuplicate', 'EnquiryController::checkDuplicate');
 
 
     //Proposal

app/Controllers/EnquiryController.php

@@ -665,6 +665,62 @@ class EnquiryController extends ResourceController
         return $this->respond(['status' => 'success','data'  => $enquiryId ], 200);
     }
 
+    public function checkDuplicate()
+    {
+        $request = $this->request->getGet();
+
+        // Input field => DB column mapping
+        $fieldMapping = [
+            "reg_no" => "vehicle_no",  // frontend → database
+            "mobile" => "mobile",
+            "email"  => "email",
+        ];
+
+        $conditions = [];
+        $inputField = null;   // what user sent
+        $dbField    = null;   // actual column
+
+        // Identify which field user sent
+        foreach ($fieldMapping as $input => $column) {
+            if (!empty($request[$input])) {
+                $inputField = $input;
+                $dbField    = $column;
+                $conditions[$column] = $request[$input];
+                break;
+            }
+        }
+
+        if (!$dbField) {
+            return $this->response->setJSON([
+                'status' => 'error',
+                'message' => 'One of the following is required: email, reg_no, mobile'
+            ])->setStatusCode(400);
+        }
+
+        // Query builder
+        $builder = $this->enquiryModel->where($dbField, $conditions[$dbField]);
+
+        // Exclude this ID if provided
+        if (!empty($request['id'])) {
+            $builder->where('id !=', $request['id']);
+        }
+
+        $enquiry = $builder->first();
+
+        if ($enquiry) {
+            return $this->response->setJSON([
+                'status' => 'exists',
+                'field'  => $inputField   // return the field user sent
+            ]);
+        } else {
+            return $this->response->setJSON([
+                'status' => 'not',
+                'field'  => $inputField
+            ]);
+        }
+    }
+
+