Initial commit: WordPress wp-content (themes, plugins, languages)

- Theme: momentry (custom theme with REST API routes)
- Plugins: code-snippets (contains all API proxies)
- Languages: zh_TW translations
- Excludes: cache, backups, uploads, logs

plugins/wp-mail-smtp/src/OptimizedEmailSending.php

@@ -0,0 +1,59 @@
+<?php
+
+namespace WPMailSMTP;
+
+/**
+ * OptimizedEmailSending class.
+ *
+ * @since 4.0.0
+ */
+class OptimizedEmailSending {
+
+	/**
+	 * The slug of the option that toggles optimized email sending.
+	 *
+	 * @since 4.0.0
+	 */
+	const SETTINGS_SLUG = 'optimize_email_sending_enabled';
+
+	/**
+	 * Register hooks.
+	 *
+	 * @since 4.0.0
+	 */
+	public function hooks() {
+
+		if ( self::is_enabled() ) {
+			// Enable the queue.
+			add_filter( 'wp_mail_smtp_queue_is_enabled', '__return_true' );
+
+			// Avoid enqueueing emails if current request
+			// is a cron request, a CLI request,
+			// or an ActionScheduler task as 3rd party plugins might
+			// be carrying out their own sending optimizations
+			// through it.
+			if (
+				! ( defined( 'WP_CLI' ) && WP_CLI ) &&
+				! wp_doing_cron() &&
+				! doing_action( 'action_scheduler_run_queue' )
+			) {
+				// Start enqueueing emails.
+				add_filter( 'wp_mail_smtp_mail_catcher_send_enqueue_email', '__return_true' );
+			}
+		}
+	}
+
+	/**
+	 * Whether optimized email sending is enabled.
+	 *
+	 * @since 4.0.0
+	 *
+	 * @return bool
+	 */
+	public static function is_enabled() {
+
+		$value = Options::init()->get( 'general', self::SETTINGS_SLUG );
+
+		return (bool) $value;
+	}
+}