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<?php /** * Convert Gallery Trait - Core conversion logic for WP Gallery to NextGEN Gallery. * * @package Imagely\NGG\REST\ConvertGallery * @since 3.x / namespace Imagely\NGG\REST\ConvertGallery; use Imagely\NGG\DataMappers\Gallery as GalleryMapper; use Imagely\NGG\DataMappers\Image as ImageMapper; use Imagely\NGG\DataStorage\Manager as StorageManager; use Imagely\NGG\DataTypes\Gallery; // Exit if accessed directly. if ( ! defined( 'ABSPATH' ) ) { exit; } /* * Convert Gallery Trait. / trait ConvertGalleryTrait { /* * Create an Imagely (NextGEN) Gallery using WordPress Gallery data. * * @param array $passed_data WP gallery passed data array. * @return array Result with gallery_id or error. / public function create_imagely_gallery_from_wp_gallery( $passed_data ) { $post_id = $passed_data['post_id'] ?? null; $columns = $passed_data['columns'] ?? 3; $size_slug = $passed_data['size_slug'] ?? 'thumbnail'; $link_target = $passed_data['link_target'] ?? ''; $images = $passed_data['images'] ?? []; $block_content = $passed_data['block_content'] ?? ''; // Generate gallery title. $date_now = wp_date( 'Y-m-d H:i:s' ); $gallery_title = sprintf( 'Converted-%s', $date_now ); if ( ! empty( $post_id ) ) { // Save the block content to post meta using a unique meta key for backup. $date_prefix = wp_date( 'Ymd_His' ); $meta_key = 'wp_gallery_block_bkp_' . wp_rand( 1000, 9999 ) . '_' . $date_prefix; update_post_meta( $post_id, $meta_key, $block_content ); // Get the post title. $post_title = get_the_title( $post_id ); if ( ! empty( $post_title ) ) { // Truncate title to 15-20 characters (using mb_ functions for multibyte support). $truncated_title = mb_strlen( $post_title ) > 20 ? mb_substr( $post_title, 0, 20 ) : $post_title; // Generate a unique gallery title. $gallery_title = sprintf( '%s-%d-Converted-%s', $truncated_title, $post_id, $date_now ); } } // Create the NextGEN Gallery. $gallery_mapper = GalleryMapper::get_instance(); $gallery = $gallery_mapper->create( [ 'title' => $gallery_title ] ); if ( ! $gallery->save() ) { return [ 'error' => __( 'There was a problem creating the gallery. Please try again.', 'nggallery' ), ]; } $gallery_id = $gallery->id(); // Import images from WordPress Media Library. $storage = StorageManager::get_instance(); $image_mapper = ImageMapper::get_instance(); $image_ids = []; $errors = []; // Raise memory limit for image processing. if ( function_exists( 'wp_raise_memory_limit' ) ) { wp_raise_memory_limit( 'image' ); } foreach ( $images as $image_data ) { $attachment_id = $image_data['id'] ?? 0; if ( empty( $attachment_id ) ) { continue; } try { $abspath = get_attached_file( $attachment_id ); if ( ! $abspath \|\| ! file_exists( $abspath ) ) { $errors[] = sprintf( // translators: %d is the attachment ID. __( 'Could not find file for attachment ID %d', 'nggallery' ), $attachment_id ); continue; } $file_data = file_get_contents( $abspath ); if ( empty( $file_data ) ) { $errors[] = sprintf( // translators: %d is the attachment ID. __( 'Could not read file for attachment ID %d', 'nggallery' ), $attachment_id ); continue; } $file_name = \Imagely\NGG\Display\I18N::mb_basename( $abspath ); $attachment = get_post( $attachment_id ); $ngg_image = $storage->upload_image( $gallery_id, $file_name, $file_data ); if ( $ngg_image ) { // Import metadata from WordPress attachment. $ngg_image = $image_mapper->find( $ngg_image ); // Use the alt text from the passed data, WordPress attachment, or title as fallback. // Priority: 1) Provided alt text, 2) WP attachment caption, 3) WP attachment alt meta, 4) Title as last resort. if ( ! empty( $image_data['alt'] ) ) { $ngg_image->alttext = $image_data['alt']; } elseif ( $attachment instanceof \WP_Post && ! empty( $attachment->post_excerpt ) ) { $ngg_image->alttext = $attachment->post_excerpt; } else { $attachment_alt = get_post_meta( $attachment_id, '_wp_attachment_image_alt', true ); if ( $attachment_alt ) { $ngg_image->alttext = $attachment_alt; } elseif ( ! empty( $image_data['title'] ) ) { // Only use title as fallback if no alt text is available. $ngg_image->alttext = $image_data['title']; } } // Use description from WordPress attachment. if ( $attachment instanceof \WP_Post && ! empty( $attachment->post_content ) ) { $ngg_image->description = $attachment->post_content; } // Apply filters and save. $ngg_image = apply_filters( 'ngg_wp_gallery_converted_image', $ngg_image, $attachment, $image_data ); $image_mapper->save( $ngg_image ); $image_ids[] = $ngg_image->{$ngg_image->id_field}; } else { $errors[] = sprintf( // translators: %s is the filename. __( 'Failed to import image: %s', 'nggallery' ), $file_name ); } } catch ( \RuntimeException $ex ) { $errors[] = $ex->getMessage(); } catch ( \Exception $ex ) { $errors[] = sprintf( // translators: %d is the attachment ID. __( 'Unexpected error importing attachment ID %d', 'nggallery' ), $attachment_id ); } } // Set the first image as preview if we imported any. if ( ! empty( $image_ids ) ) { $gallery->previewpic = $image_ids[0]; $gallery_mapper->save( $gallery ); } // If no images were imported, delete the gallery and return error. if ( empty( $image_ids ) ) { $gallery_mapper->destroy( $gallery_id ); return [ 'error' => __( 'No images could be imported. The gallery was not created.', 'nggallery' ), ]; } $response_data = [ 'gallery_id' => $gallery_id, 'title' => $gallery_title, 'columns' => $columns, 'image_count' => count( $image_ids ), 'image_ids' => $image_ids, 'errors' => $errors, 'message' => __( 'Converted successfully. Don\'t forget to save your changes!', 'nggallery' ), ]; return $response_data; } /** * Process gallery shortcodes in post content. * * @param string $updated_content Reference to content being updated. * @param int $post_id Post ID. * @param bool $needs_update Reference to flag indicating if update is needed. * @return \WP_REST_Response\|void / public function process_gallery_shortcodes( &$updated_content, $post_id, &$needs_update ) { if ( ! has_shortcode( $updated_content, 'gallery' ) ) { return; } preg_match_all( '/\[gallery(.?)\]/', $updated_content, $matches, PREG_SET_ORDER ); foreach ( $matches as $shortcode ) { $shortcode_string = $shortcode[0]; $shortcode_attrs = shortcode_parse_atts( $shortcode[1] ); // Extract gallery attributes. $ids = isset( $shortcode_attrs['ids'] ) ? explode( ',', $shortcode_attrs['ids'] ) : []; $include = isset( $shortcode_attrs['include'] ) ? explode( ',', $shortcode_attrs['include'] ) : []; $exclude = isset( $shortcode_attrs['exclude'] ) ? explode( ',', $shortcode_attrs['exclude'] ) : []; $columns = isset( $shortcode_attrs['columns'] ) ? absint( $shortcode_attrs['columns'] ) : 3; $size_slug = isset( $shortcode_attrs['size'] ) ? sanitize_text_field( $shortcode_attrs['size'] ) : 'thumbnail'; $gallery_id = isset( $shortcode_attrs['id'] ) ? absint( $shortcode_attrs['id'] ) : 0; // Fetch attachments for the shortcode. if ( empty( $ids ) ) { $query_args = [ 'post_type' => 'attachment', 'post_status' => 'inherit', 'posts_per_page' => -1, 'fields' => 'ids', 'post_parent' => $gallery_id ? $gallery_id : $post_id, ]; if ( ! empty( $include ) ) { $query_args['post__in'] = array_map( 'absint', $include ); } if ( ! empty( $exclude ) ) { $query_args['post__not_in'] = array_map( 'absint', $exclude ); } $ids = get_posts( $query_args ); } // Create gallery images array. $images = []; foreach ( $ids as $id ) { $image_id = absint( $id ); $image_url = wp_get_attachment_url( $image_id ); $image_title = get_the_title( $image_id ); $image_alt = get_post_meta( $image_id, '_wp_attachment_image_alt', true ); if ( $image_url ) { $images[] = [ 'id' => $image_id, 'url' => $image_url, 'title' => $image_title, 'alt' => $image_alt, ]; } } if ( ! empty( $images ) ) { $passed_data = [ 'post_id' => $post_id, 'columns' => $columns, 'size_slug' => $size_slug, 'link_target' => '_self', 'images' => $images, 'block_content' => $shortcode_string, ]; $created_result = $this->create_imagely_gallery_from_wp_gallery( $passed_data ); if ( isset( $created_result['error'] ) && ! empty( $created_result['error'] ) ) { return new \WP_REST_Response( [ 'message' => $created_result['error'] ], 400 ); } else { $imagely_shortcode = "[imagely id=\"{$created_result['gallery_id']}\"]"; $updated_content = str_replace( $shortcode_string, $imagely_shortcode, $updated_content ); $needs_update = true; } } } } /** * Process gallery blocks in post content. * * @param array $blocks Reference to parsed blocks array. * @param int $post_id Post ID. * @param bool $needs_update Reference to flag indicating if update is needed. * @return void / public function process_gallery_blocks( &$blocks, $post_id, &$needs_update ) { foreach ( $blocks as &$block ) { // If the block is a gallery block. if ( 'core/gallery' === $block['blockName'] ) { // Extract the attributes. $columns = $block['attrs']['columns'] ?? 3; $size_slug = $block['attrs']['sizeSlug'] ?? 'thumbnail'; $link_target = $block['attrs']['linkTo'] ?? ''; $block_content = serialize_block( $block ); $images = []; // Check if there are inner blocks (Gutenberg gallery structure). if ( isset( $block['innerBlocks'] ) && is_array( $block['innerBlocks'] ) ) { foreach ( $block['innerBlocks'] as $inner_block ) { // If the inner block is an image block. if ( 'core/image' === $inner_block['blockName'] ) { $image_id = isset( $inner_block['attrs']['id'] ) ? absint( $inner_block['attrs']['id'] ) : 0; if ( $image_id ) { $image_url = wp_get_attachment_url( $image_id ); $image_title = get_the_title( $image_id ); // Use the `alt` from the HTML if not available in attributes. $image_alt = ''; if ( ! empty( $inner_block['innerHTML'] ) ) { $doc = new \DOMDocument( '1.0', 'UTF-8' ); $previous_use_internal_errors = libxml_use_internal_errors( true ); // Prepend UTF-8 encoding declaration to prevent character corruption. $loaded = $doc->loadHTML( '<?xml encoding="UTF-8">' . $inner_block['innerHTML'] ); libxml_clear_errors(); libxml_use_internal_errors( $previous_use_internal_errors ); if ( $loaded ) { $img_tag = $doc->getElementsByTagName( 'img' )->item( 0 ); if ( $img_tag && $img_tag->hasAttribute( 'alt' ) ) { $image_alt = $img_tag->getAttribute( 'alt' ); } } } // Fallback: If `alt` is not in HTML, try `_wp_attachment_image_alt` meta. if ( ! $image_alt ) { $image_alt = get_post_meta( $image_id, '_wp_attachment_image_alt', true ); } $images[] = [ 'id' => $image_id, 'url' => $image_url, 'title' => $image_title, 'alt' => $image_alt, ]; } } } } if ( empty( $images ) \|\| ! is_array( $images ) ) { // Recursively process inner blocks even if this gallery has no images. if ( isset( $block['innerBlocks'] ) && is_array( $block['innerBlocks'] ) ) { $this->process_gallery_blocks( $block['innerBlocks'], $post_id, $needs_update ); } continue; } $passed_data = [ 'post_id' => $post_id, 'columns' => $columns, 'size_slug' => $size_slug, 'link_target' => $link_target, 'images' => $images, 'block_content' => $block_content, ]; $created_result = $this->create_imagely_gallery_from_wp_gallery( $passed_data ); if ( isset( $created_result['error'] ) && ! empty( $created_result['error'] ) ) { // Continue processing other blocks even if one fails. continue; } else { // Replace the core/gallery block with imagely/main-block. $block['blockName'] = 'imagely/main-block'; $block['attrs'] = [ 'content' => "[imagely id=\"{$created_result['gallery_id']}\"]", ]; $block['innerBlocks'] = []; $block['innerHTML'] = "[imagely id=\"{$created_result['gallery_id']}\"]"; $block['innerContent'] = [ "[imagely id=\"{$created_result['gallery_id']}\"]", ]; $needs_update = true; } } // Recursively process inner blocks. if ( isset( $block['innerBlocks'] ) && is_array( $block['innerBlocks'] ) ) { $this->process_gallery_blocks( $block['innerBlocks'], $post_id, $needs_update ); } } } /* * Check if the current user can edit the post. * * @param int $post_id Post ID. * @return bool */ public function can_edit_post( $post_id ) { return current_user_can( 'edit_post', $post_id ); } }

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