Added log_to_file() debug function

quiztech-assessment-platform.php

@@ -309,3 +309,35 @@ function quiztech_register_rest_routes() {
 }
 add_action( 'rest_api_init', 'quiztech_register_rest_routes' );
 
+/**
+ * Basic logging function for debugging. Allows passing of an object or array for the $data paramater
+ *
+ * Set the CUSTOM_DEBUG_LOG file in wp-config.php
+ *
+ */
+function log_to_file($message, $data = false){
+    // Only proceed if a message is provided
+    if ($message) {
+        // Check if the custom log file constant is defined
+        if (defined('CUSTOM_DEBUG_LOG') && CUSTOM_DEBUG_LOG) {
+            $log_File = CUSTOM_DEBUG_LOG;
+
+            $date = new DateTime();
+            $date = $date->format("Y/m/d h:i:s");
+
+            // Convert arrays and objects to JSON format
+            if (is_array($data) || is_object($data)) {
+                $data = json_encode($data, JSON_PRETTY_PRINT);
+                $message = $message . "\r\n" . $data;
+            } else if ($data) {
+                $message = $message . " " . $data;
+            }
+
+            // Log the message to the specified file
+            error_log("[$date] " . $message ."\r\n", 3, $log_File);
+        }
+        // If CUSTOM_DEBUG_LOG is not defined, do nothing (fail silently)
+        // Alternatively, could log to default PHP error log:
+        // else { error_log("Quiztech Debug: " . $message); }
+    }
+}

src/Includes/payments.php

@@ -25,7 +25,8 @@ if ( ! \defined( 'WPINC' ) ) {
  * @return mixed Gateway-specific response (e.g., redirect URL, session ID) or WP_Error on failure.
  */
 function quiztech_initiate_credit_purchase( $user_id, $item_id, $quantity = 1 ) {
- // 1. Validate input
+log_to_file("quiztech_initiate_credit_purchase - 1"); 
+// 1. Validate input
  if ( ! $user_id || ! \get_user_by( 'ID', $user_id ) ) {
  	return new \WP_Error( 'invalid_user', \__( 'Invalid user ID provided.', 'quiztech' ) );
  }
@@ -37,6 +38,7 @@ function quiztech_initiate_credit_purchase( $user_id, $item_id, $quantity = 1 )
  	return new \WP_Error( 'invalid_quantity', \__( 'Quantity must be at least 1.', 'quiztech' ) );
  }
 
+ log_to_file("quiztech_initiate_credit_purchase - 2"); 
  // 2. Get Item Details (Using hardcoded packages for now, mirroring the theme)
  // TODO: Move credit packages to a filterable array or WP options for better management.
  $credit_packages = array(
@@ -57,6 +59,7 @@ function quiztech_initiate_credit_purchase( $user_id, $item_id, $quantity = 1 )
  // Convert price to cents for Stripe
  $price_in_cents = (int) ( (float) $price_decimal * 100 );
 
+ log_to_file("quiztech_initiate_credit_purchase - 3"); 
  // 3. Get Active Gateway
  // TODO: Read active gateway from plugin settings (e.g., get_option('quiztech_settings')['payment_gateway'])
  $active_gateway = 'stripe'; // Placeholder
@@ -68,6 +71,7 @@ function quiztech_initiate_credit_purchase( $user_id, $item_id, $quantity = 1 )
  	}
  	$gateway = new StripeGateway();
 
+	 log_to_file("quiztech_initiate_credit_purchase - 4"); 
  	// 4. Prepare Metadata for Stripe and Webhook
  	$metadata = [
  		'user_id'         => $user_id,
@@ -79,9 +83,12 @@ function quiztech_initiate_credit_purchase( $user_id, $item_id, $quantity = 1 )
  		'transaction_type'=> 'credit_purchase', // Identify the transaction type
  	];
 
+	 log_to_file("quiztech_initiate_credit_purchase - 5"); 
  	// 5. Call Gateway's initiatePayment method
  	$result = $gateway->initiatePayment( $user_id, $item_id, $quantity, $price_in_cents, $currency, $metadata );
 
+
+	log_to_file("quiztech_initiate_credit_purchase - Result: ", $result); 
  	// The gateway method should handle the redirect on success or return WP_Error
  	return $result;
  }