From 5febb68e198787ff16aa2c70f19a3ed2d30c9284 Mon Sep 17 00:00:00 2001
From: lucha <lucha@paranoici.org>
Date: Wed, 17 Aug 2016 17:43:22 +0200
Subject: [PATCH] command to convert NGG galleries to standard Wordpress ones
---
bin/noblogs.in | 21 +++++
lib/ngg.php | 242 +++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 263 insertions(+)
create mode 100644 lib/ngg.php
diff --git a/bin/noblogs.in b/bin/noblogs.in
index 05fd9a7..d7e9e41 100755
--- a/bin/noblogs.in
+++ b/bin/noblogs.in
@@ -68,6 +68,10 @@ Known commands:
Set read-only mode for the local noblogs installation. The argument
must be either the literal 'on' or 'off'.
+ ngg-convert BLOG
+ Convert Next Gen Gallery (NGG) photo galleries to stardard Wordpress
+ galleries, and then notify (via email) admins of the fact.
+
<?php
exit(1);
}
@@ -415,6 +419,23 @@ function do_set_readonly($args) {
}
+function do_ngg_convert($args) {
+ require_once(dirname(__FILE__) . '/ngg.php');
+ foreach ($args as $arg) {
+ $blog = noblogs_get_blog($arg);
+ if (!$blog) {
+ echo "Blog {$arg} not found.\n";
+ continue;
+ }
+ switch_to_blog($blog->blog_id);
+ echo "Converting blog ${arg}: \n";
+ $post_ids = ngg_convert();
+ ngg_alert_admin($post_ids);
+ restore_current_blog();
+ }
+}
+
+
// Command-line parsing.
$cmd = $argv[1];
if (!$cmd) {
diff --git a/lib/ngg.php b/lib/ngg.php
new file mode 100644
index 0000000..63cf2ff
--- /dev/null
+++ b/lib/ngg.php
@@ -0,0 +1,242 @@
+<?php
+
+require_once(NOBLOGS_ROOT . '/wp-admin/includes/media.php');
+require_once(NOBLOGS_ROOT . '/wp-admin/includes/file.php');
+require_once(NOBLOGS_ROOT . '/wp-admin/includes/image.php');
+
+function ngg_get_post_ids( $limit = -1 ) {
+ $args = array(
+ 's' => '[nggallery',
+ 'post_type' => array( 'post', 'page' ),
+ 'post_status' => 'any',
+ 'nopaging' => true,
+ 'fields' => 'ids',
+ 'posts_per_page' => $limit
+ );
+
+ $query = new WP_Query( $args );
+ return $query->posts;
+}
+
+function do_ngg_count($args) {
+ foreach ($args as $arg) {
+ $blog = noblogs_get_blog($arg);
+ if (!$blog) {
+ echo "Blog {$arg} not found.\n";
+ continue;
+ }
+ switch_to_blog($blog->blog_id);
+ $post_ids = ngg_get_post_ids();
+ $count = count($post_ids);
+ echo "${arg} : ${count} \n";
+ foreach ( $post_ids as $post_id ) {
+ $post = get_post( $post_id );
+ $gallery_count = count(ngg_find_gallery_shortcodes($post));
+ echo "\t ${post_id}: ${gallery_count} \n";
+ }
+ restore_current_blog();
+ }
+}
+
+function ngg_upload_image($post, $path, $image){
+ $url = home_url( trailingslashit( $path ) . $image->filename );
+ // Let's use a hash trick here to find our attachment post after it's been sideloaded.
+ $hash = md5( 'attachment-hash' . $url . $image->description . time() . rand( 1, 999 ) );
+ $result = media_sideload_image( $url, $post->ID, $hash );
+ if ( is_wp_error( $result ) ) {
+ echo sprintf( "Error loading %s: %s\n", $url, $result->get_error_message() );
+ return;
+ } else {
+ $attachments = get_posts( array(
+ 'post_parent' => $post->ID,
+ 's' => $hash,
+ 'post_type' => 'attachment',
+ 'posts_per_page' => -1,
+ ) );
+
+ if ( ! $attachments || ! is_array( $attachments ) || count( $attachments ) != 1 ) {
+ echo sprintf( "Error: Could not insert attachment for %d\n", $post->ID );
+ return;
+ }
+ }
+ return $attachments[0];
+}
+
+function ngg_upload_gallery($post,$gallery_id){
+ global $wpdb;
+ $path = $wpdb->get_row( "SELECT * FROM {$wpdb->prefix}ngg_gallery WHERE gid = ". intval( $gallery_id ), ARRAY_A );
+ $images = $wpdb->get_results( "SELECT * FROM {$wpdb->prefix}ngg_pictures WHERE galleryid = ". intval( $gallery_id ) . " ORDER BY sortorder, pid ASC" );
+
+ if ( ! $path || ! $images ) {
+ echo sprintf( "Warning: Could not find images for nggallery %d\n", $gallery_id );
+ return;
+ }
+ $attached_images = [];
+
+ foreach ( $images as $image ) {
+ $attachment = ngg_upload_image($post, $path['path'], $image);
+
+ // Titles should fallback to the filename.
+ if ( ! trim( $image->alttext ) ) {
+ $image->alttext = $image->filename;
+ }
+
+ $attachment->post_title = $image->alttext;
+ $attachment->post_content = $image->description;
+ $attachment->menu_order = $image->sortorder;
+
+ update_post_meta( $attachment->ID, '_wp_attachment_image_alt', $image->alttext );
+
+ wp_update_post( $attachment );
+ $attached_images[] = $attachment->ID;
+ echo sprintf( "Log: Added attachment %d for post %d \n", $attachment->ID, $post->ID );
+ }
+ return array( $images, $attached_images );
+}
+
+// If there are existing images attached the post,
+// let's remember to exclude them from our new gallery.
+function ngg_exclude_existing_attachments($post_ID){
+ $existing_attachments_ids = get_posts( array(
+ 'post_type' => 'attachment',
+ 'post_status' => 'inherit',
+ 'post_parent' => $post_ID,
+ 'post_mime_type' => 'image',
+ 'fields' => 'ids',
+ ) );
+
+ $attr = array();
+ if ( $existing_attachments_ids )
+ $attr['exclude'] = implode( ',', $existing_attachments_ids );
+
+ return $attr;
+}
+
+function ngg_find_gallery_shortcodes($post){
+ $matches = null;
+ preg_match_all( '/\[nggallery.*?\]/si', $post->post_content, $matches );
+ return $matches[0];
+}
+
+function ngg_parse_shortcode($shortcode){
+ $atts = shortcode_parse_atts($shortcode);
+ return intval( $atts['id'] );
+}
+
+function ngg_convert() {
+ global $wpdb;
+ $uploads = wp_upload_dir();
+ $baseurl = $uploads['baseurl'];
+ $posts_count = 0;
+ $gallery_count = 0;
+ $images_count = 0;
+ $blog_id = get_current_blog_id();
+
+ $post_ids = ngg_get_post_ids();
+ foreach ( $post_ids as $post_id ) {
+ $post = get_post( $post_id );
+ $matches = null;
+
+ // If there are existing images attached the post,
+ // let's remember to exclude them from our new gallery.
+ $code_attr = ngg_exclude_existing_attachments($post->ID);
+
+ foreach ( ngg_find_gallery_shortcodes($post) as $shortcode ){
+ $gallery_id = ngg_parse_shortcode($shortcode);
+
+ list ($gallery_images, $attached_images) = ngg_upload_gallery($post, $gallery_id);
+
+ if ( count($gallery_images) != count($attached_images) ) {
+ echo "Not replacing ${shortcode}. ";
+ echo sprintf("%d of %d images converted.\n", count($attached_images), count($gallery_images));
+ continue;
+ }
+
+ // Construct the [gallery] shortcode
+ $code_attr['ids'] = implode(',', $attached_images);
+ $new_shortcode = '[gallery';
+ foreach ( $code_attr as $key => $value )
+ $new_shortcode .= sprintf( ' %s="%s"', esc_attr( $key ), esc_attr( $value ) );
+ $new_shortcode .= ']';
+
+ $post->post_content = str_replace( $shortcode, $new_shortcode, $post->post_content );
+ echo sprintf( "Log: Blog id %d. Updated gallery id %d of post %d \n", $blog_id, $gallery_id, $post->ID );
+ $images_count += count($attached_images);
+ $gallery_count++;
+ }
+
+ // Booyaga!
+ wp_update_post( $post );
+ $posts_count++;
+ }
+
+ echo "Log: Converted ${posts_count} posts, ${gallery_count} galleries and ${images_count} images \n";
+ return $post_ids;
+}
+
+function ngg_alert_admin($post_ids = null) {
+ if (!$post_ids){
+ $post_ids = ngg_get_post_ids();
+ }
+ $posts_count = count($post_ids);
+
+ $blog_id = get_current_blog_id();
+ $blog_name = get_bloginfo('name');
+ if (!$blog_name){
+ $blog_name = home_url();
+ }
+ $blog_url = site_url();
+ $admin_email = get_bloginfo('admin_email');
+ $admin_user = get_user_by( 'email', $admin_email);
+ $admin_name = $admin_user->user_nicename;
+ if (!$admin_name){
+ $admin_name = $admin_email;
+ }
+
+ $post_list = "";
+ foreach ( $post_ids as $post_id ) {
+ $post_title = get_post($post_id)->post_title;
+ $post_url = get_permalink($post_id);
+ $post_list = $post_list . "${post_title}: ${post_url} \n";
+ }
+
+ $mail_body = <<<EOT
+Dear ${admin_name},
+you are receiving this message because your are the admin of the blog "${blog_name}"
+${blog_url}
+
+We are in the process of removing the NextGen Gallery Plugin and converting all existing
+image galleries to the standard Wordpress media manager.
+
+In your blog, we have found that the following posts include NextGen Galleries that should
+have been converted:
+${post_list}
+If everything went well, you do not have to do anything at all.
+Please check that the images are showing correctly, and let us know if something went wrong.
+
+with love and +kaos
+Autistici/Inventati
+-------------------
+
+Caro ${admin_name},
+ricevi questa email perché sei l'amministratore del blog "${blog_name}"
+${blog_url}
+
+Stiamo per rimuovere il plugin NextGen Gallery e abbiamo trasferito tutte le gallerie
+di immagini al gestore di media di Wordpress.
+
+Nel tuo blog, ci sono i seguenti posts che includevano gallerie di NextGen e che sono
+state convertite:
+${post_list}
+Se è andato tutto a buon fine, non devi fare nient'altro.
+Controlla che le immagini si visualizzano correttamente, e facci sapere se c'è qualcosa
+che non va.
+
+con amore e +kaos
+Autistici/Inventati
+
+EOT;
+ echo "Sending email to ${admin_email} \n";
+ wp_mail($admin_email, "[Noblogs] Removing NextGen Gallery Plugin",
+ $mail_body, 'From: Autistici/Inventati <info@autistici.org>' . "\r\n");
+}
--
GitLab