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wp-content/plugins/polylang/integrations/wp-offload-media/as3cf.php

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+<?php
+/**
+ * @package Polylang
+ */
+
+/**
+ * A class to manage the integration with WP Offload Media Lite.
+ * Version tested: 2.1.1
+ *
+ * @since 2.6
+ */
+class PLL_AS3CF {
+	/**
+	 * Stores if a media is translated when it is deleted.
+	 *
+	 * @var bool[]
+	 */
+	private $is_media_translated = array();
+
+	/**
+	 * Initializes filters and actions.
+	 *
+	 * @since 2.6
+	 */
+	public function init() {
+		add_filter( 'pll_copy_post_metas', array( $this, 'copy_post_metas' ) );
+		add_action( 'delete_attachment', array( $this, 'check_translated_media' ), 5 ); // Before Polylang deletes the translations information.
+		add_action( 'delete_attachment', array( $this, 'prevent_file_deletion' ), 15 ); // Between Polylang and WP Offload Media.
+	}
+
+	/**
+	 * Synchronizes post metas
+	 *
+	 * @since 2.6
+	 *
+	 * @param array $metas List of custom fields names.
+	 * @return array
+	 */
+	public function copy_post_metas( $metas ) {
+		$metas[] = 'amazonS3_info';
+		$metas[] = 'as3cf_filesize_total';
+		return $metas;
+	}
+
+	/**
+	 * Checks if the deleted attachment was translated and stores the information.
+	 *
+	 * @since 2.6
+	 *
+	 * @param int $post_id Id of the attachment being deleted.
+	 */
+	public function check_translated_media( $post_id ) {
+		$this->is_media_translated[ $post_id ] = ( count( pll_get_post_translations( $post_id ) ) > 1 );
+	}
+
+	/**
+	 * Deletes the WP Offload Media information from the attachment being deleted.
+	 * That way WP Offload Media won't delete the file stored in the cloud.
+	 * Done after Polylang has deleted the translations informations, to avoid the synchronization of the deletion
+	 * and of course before WP Offload Media deletes the file, normally at priority 20.
+	 *
+	 * @since 2.6
+	 *
+	 * @param int $post_id Id of the attachment being deleted.
+	 */
+	public function prevent_file_deletion( $post_id ) {
+		if ( ! empty( $this->is_media_translated[ $post_id ] ) ) {
+			delete_post_meta( $post_id, 'amazonS3_info' );
+			delete_post_meta( $post_id, 'as3cf_filesize_total' );
+		}
+	}
+}