fix: ensure constants are only defined if not already set

Author: WasiUr919

conversion-tracking.php

@@ -150,12 +150,24 @@ public function includes() {
      * @return void
      */
     public function define_constants() {
-        define( 'WCCT_VERSION', $this->version );
-        define( 'WCCT_FILE', __FILE__ );
-        define( 'WCCT_PATH', dirname( WCCT_FILE ) );
-        define( 'WCCT_INCLUDES', WCCT_PATH . '/includes' );
-        define( 'WCCT_URL', plugins_url( '', WCCT_FILE ) );
-        define( 'WCCT_ASSETS', WCCT_URL . '/assets' );
+        if ( ! defined( 'WCCT_VERSION' ) ) {
+            define( 'WCCT_VERSION', $this->version );
+        }
+        if ( ! defined( 'WCCT_FILE' ) ) {
+            define( 'WCCT_FILE', __FILE__ );
+        }
+        if ( ! defined( 'WCCT_PATH' ) ) {
+            define( 'WCCT_PATH', dirname( WCCT_FILE ) );
+        }
+        if ( ! defined( 'WCCT_INCLUDES' ) ) {
+            define( 'WCCT_INCLUDES', WCCT_PATH . '/includes' );
+        }
+        if ( ! defined( 'WCCT_URL' ) ) {
+            define( 'WCCT_URL', plugins_url( '', WCCT_FILE ) );
+        }
+        if ( ! defined( 'WCCT_ASSETS' ) ) {
+            define( 'WCCT_ASSETS', WCCT_URL . '/assets' );
+        }
     }
 
     /**