add option for disabling existing feed

facebook-commerce.php

@@ -40,6 +40,9 @@ class WC_Facebookcommerce_Integration extends WC_Integration {
 	/** @var string the WordPress option name where the external merchant settings ID is stored */
 	const OPTION_EXTERNAL_MERCHANT_SETTINGS_ID = 'wc_facebook_external_merchant_settings_id';
 
+	/** @var string Option name for disabling feed. */
+ 	const OPTION_LEGACY_FEED_FILE_GENERATION_ENABLED = 'wc_facebook_legacy_feed_file_generation_enabled';
+
 	/** @var string the WordPress option name where the feed ID is stored */
 	const OPTION_FEED_ID = 'wc_facebook_feed_id';
 
@@ -3175,6 +3178,26 @@ public function is_product_sync_enabled() {
 		return (bool) apply_filters( 'wc_facebook_is_product_sync_enabled', 'yes' === get_option( self::SETTING_ENABLE_PRODUCT_SYNC, 'yes' ), $this );
 	}
 
+	/**
+ 	 * Return true if (legacy) feed generation is enabled.
+ 	 *
+ 	 * Feed generation for product sync is enabled by default, and generally recommended.
+ 	 * Large stores, or stores running on shared hosting (low resources) may have issues
+ 	 * with feed generation. This option allows those stores to disable generation to
+ 	 * work around the issue.
+ 	 *
+ 	 * Note - this is temporary. In a future release, an improved feed system will be
+ 	 * implemented, which should work well for all stores. This option will not disable
+ 	 * the new improved implementation.
+ 	 *
+ 	 * @since 2.5.0
+ 	 *
+ 	 * @return bool
+ 	 */
+ 	public function is_legacy_feed_file_generation_enabled() {
+ 		return (bool) ( 'yes' === get_option( self::OPTION_LEGACY_FEED_FILE_GENERATION_ENABLED, 'yes' ) );
+ 	}
+
 
 	/**
 	 * Determines whether the scheduled re-sync is enabled.

includes/Products/Feed.php

@@ -158,10 +158,14 @@ public function regenerate_feed() {
 	 */
 	public function schedule_feed_generation() {
 
-		$integration = facebook_for_woocommerce()->get_integration();
-
-		// only schedule if configured
-		if ( ! $integration || ! $integration->is_configured() || ! $integration->is_product_sync_enabled() ) {
+		$integration   = facebook_for_woocommerce()->get_integration();
+		$configured_ok = $integration && $integration->is_configured();
+
+		// Only schedule feed job if store has not opted out of product sync.
+		$store_allows_sync = $configured_ok && $integration->is_product_sync_enabled();
+		// Only schedule if has not opted out of feed generation (e.g. large stores).
+		$store_allows_feed = $configured_ok && $integration->is_legacy_feed_file_generation_enabled();
+		if ( ! $store_allows_sync || ! $store_allows_feed ) {
 			as_unschedule_all_actions( self::GENERATE_FEED_ACTION );
 			return;
 		}