[garbage-collector] [configuration] Make garbage collector expiration time configurable.

Author: swashata

includes/class-freemius.php

@@ -1357,8 +1357,8 @@ function _plugins_loaded() {
         }
 
         function _run_garbage_collector() {
-            // @todo - Remove this check once the garbage collector is ready.
-            if ( ! defined( 'WP_FS__ENABLE_GARBAGE_COLLECTOR' ) || true !== WP_FS__ENABLE_GARBAGE_COLLECTOR ) {
+            // @todo - Remove this check once the garbage collector is ready to be out of beta.
+            if ( true !== fs_get_optional_constant( 'WP_FS__ENABLE_GARBAGE_COLLECTOR', false ) ) {
                 return;
             }
 

includes/class-fs-garbage-collector.php

@@ -195,7 +195,9 @@ private function is_product_active( $slug ) {
                 }
             }
 
-            if ( $this->get_last_load_timestamp( $slug ) > ( time() - ( WP_FS__TIME_WEEK_IN_SEC * 4 ) ) ) {
+            $expiration_time = fs_get_optional_constant( 'WP_FS__GARBAGE_COLLECTOR_EXPIRATION_TIME_SECS', ( WP_FS__TIME_WEEK_IN_SEC * 4 ) );
+
+            if ( $this->get_last_load_timestamp( $slug ) > ( time() - $expiration_time ) ) {
                 // Last activation was within the last 4 weeks.
                 return true;
             }

includes/fs-core-functions.php

@@ -1485,4 +1485,21 @@ function fs_apply_filter( $module_unique_affix, $tag, $value ) {
                     array_slice( $args, 2 ) )
             );
         }
+    }
+
+    if ( ! function_exists( 'fs_get_optional_constant' ) ) {
+        /**
+         * Gets the value of an optional constant. If the constant is not defined, the default value will be returned.
+         *
+         * @author Swashata Ghosh (@swashata)
+         * @since 2.5.12.5
+         *
+         * @param string $constant_name
+         * @param mixed $default_value
+         *
+         * @return mixed
+         */
+        function fs_get_optional_constant( $constant_name, $default_value = null ) {
+            return defined( $constant_name ) ? constant( $constant_name ) : $default_value;
+        }
     }