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<?php
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/**
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 * Plugin Name: Polylang/WPBakery image filter fix
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 * Description: A plugin that fixes the disappearing images issue when using WPBakery and Polylang together and NOT translating the Media Library
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 * Version: 1.0.0
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 * Author: ellmann creative
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 */
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if (!function_exists('is_plugin_active')) { include_once(ABSPATH . 'wp-admin/includes/plugin.php'); }
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add_action('init', function(){
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   $selfDisableFunction = function($s){
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      deactivate_plugins( plugin_basename( __FILE__ ) ); 
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      if ( isset( $_GET['activate'] ) )
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          unset( $_GET['activate'] );
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      define("ec_wpbakery_polylang_fix_notice_content", $s);
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      add_action( 'admin_notices', function(){
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         echo "<div class=\"notice-info is-dismissible\"><p><strong>Polylang/WPBakery image filter fix</strong>: " .
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              ec_wpbakery_polylang_fix_notice_content . " We're disabling the plugin.</p></div>";
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      });
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   };
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   if ( !is_plugin_active('polylang/polylang.php') ){
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      $selfDisableFunction("it seems that Polylang is not present or enabled in your installation.");
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      return; // Polylang not present
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   }
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   # Polylang is present and active, then
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   if ( get_option('polylang')['media_support'] !== false ){
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      $selfDisableFunction("your Polylang configuration seems to be just fine (or else you're experiencing a different bug).");
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      return; // presumably works correctly?
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   }
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   if ( !function_exists('icl_object_id') ){
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      $selfDisableFunction("looks like the problematic code was removed from your version of Polylang.");
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      return; // presumably, the problematic function was removed?
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   }
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   # okay, Polylang is present, active, and NOT handling the Media Library
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   # ... so, let's test if it's breaking it instead?
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   $attachments = new WP_Query( ['post_type' => 'attachment', 'posts_per_page'=> 1, 'post_status' => 'any'] );
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   if ( !$attachments->have_posts() )
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      return; // no media present, so we don't have to bother (but don't disable)
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   # we have media; time to test the first one
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   $testPostID     = $attachments->posts[0]->ID;
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   $filteredPostID = icl_object_id($testPostID, 'post');
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   if ( $testPostID != $filteredPostID || $filteredPostID === null ) {
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      # the bug was triggered!
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      if ( !is_admin() ){
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         # fix it (in the front-end)
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         remove_filter('wpml_object_id', 'icl_object_id',         10, 4);
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         add_filter(   'wpml_object_id', 'icl_object_id_patched', 10, 4);
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      }
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   } else if ( is_admin() ) {
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      # the bug was NOT triggered, so we can display a notification and disable ourselves, actually
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      $selfDisableFunction("it looks like your version of Polylang isn't affected by the bug this patch aims to fix.");
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   }
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});
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function icl_object_id_patched( $id, $type = 'post', $return_original_if_missing = false, $lang = '' ) {
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   $lang = $lang ? $lang : pll_current_language();
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   if ( 'nav_menu' === $type ) {
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      $theme = get_option( 'stylesheet' );
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      if ( isset( PLL()->options['nav_menus'][ $theme ] ) ) {
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         foreach ( PLL()->options['nav_menus'][ $theme ] as $menu ) {
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            if ( array_search( $id, $menu ) && ! empty( $menu[ $lang ] ) ) {
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               $tr_id = $menu[ $lang ];
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               break;
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            }
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         }
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      }
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   } elseif ( $pll_type = ( 'post' === $type || pll_is_translated_post_type( $type ) ) ? 'post' : ( 'term' === $type || pll_is_translated_taxonomy( $type ) ? 'term' : false ) ) {
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      $tr_id = PLL()->model->$pll_type->get_translation( $id, $lang );
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   }
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   # patch
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   if (    'attachment' === get_post_type( $id )
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        && get_option('polylang')['media_support'] === false ){
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      $return_original_if_missing = true;
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   }
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   # /patch
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   return ! empty( $tr_id ) ? $tr_id : ( $return_original_if_missing ? $id : null );
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}
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