Wordpress Plugina - Taxonomien nutzen: Unterschied zwischen den Versionen
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Aktuelle Version vom 20. Januar 2015, 10:29 Uhr
Taxonomien im Backend nutzen[Bearbeiten]
In der Medienverwaltung gibt es zunächst keine Möglichkeit die Dateien sinnvoll zu organisieren. Das kann man leicht ändern.
Für Taxonomien wie Kategorien oder Tags stellt Wordpress Funktionen bereit, die man über die functions.php sowohl in Themes als auch in Plugins nutzen kann. Sinnvoll ist es das Ganze in ein Plugin zu packen.
http://wiki.zone30.info/wikizone/index.php/Wordpress_Plugins_-_Basics
<?php
/**
* Plugin Name: Media Library Categories
* Plugin URI: http://wordpress.org/plugins/wp-media-library-categories/
* Description: Adds the ability to use categories in the media library.
* Version: 1.4.15
* Author: Jeffrey-WP
* Author URI: http://codecanyon.net/user/jeffrey-wp/?ref=jeffrey-wp
*/
/** Custom update_count_callback */
function wpmediacategory_update_count_callback( $terms = array(), $taxonomy = 'category' ) {
global $wpdb;
// default taxonomy
$taxonomy = 'category';include 'gb-taxonomies.php';
// add filter to change the default taxonomy
$taxonomy = apply_filters( 'wpmediacategory_taxonomy', $taxonomy );
// select id & count from taxonomy
$query = "SELECT term_taxonomy_id, MAX(total) AS total FROM ((
SELECT tt.term_taxonomy_id, COUNT(*) AS total FROM $wpdb->term_relationships tr, $wpdb->term_taxonomy tt WHERE tr.term_taxonomy_id = tt.term_taxonomy_id AND tt.taxonomy = %s GROUP BY tt.term_taxonomy_id
) UNION ALL (
SELECT term_taxonomy_id, 0 AS total FROM $wpdb->term_taxonomy WHERE taxonomy = %s
)) AS unioncount GROUP BY term_taxonomy_id";
$rsCount = $wpdb->get_results( $wpdb->prepare( $query, $taxonomy, $taxonomy ) );
// update all count values from taxonomy
foreach ( $rsCount as $rowCount ) {
$wpdb->update( $wpdb->term_taxonomy, array( 'count' => $rowCount->total ), array( 'term_taxonomy_id' => $rowCount->term_taxonomy_id ) );
}
}
/** register taxonomy for attachments */
function wpmediacategory_init() {
// Default taxonomy
$taxonomy = 'category';
// Add filter to change the default taxonomy
$taxonomy = apply_filters( 'wpmediacategory_taxonomy', $taxonomy );
if ( $taxonomy != 'category' ) {
$args = array(
'hierarchical' => true, // hierarchical: true = display as categories, false = display as tags
'show_admin_column' => true,
'update_count_callback' => 'wpmediacategory_update_count_callback'
);
register_taxonomy( $taxonomy, array( 'attachment' ), $args );
} else {
register_taxonomy_for_object_type( $taxonomy, 'attachment' );
}
}
add_action( 'init', 'wpmediacategory_init' );
/** change default update_count_callback for category taxonomy */
function wpmediacategory_change_category_update_count_callback() {
global $wp_taxonomies;
// Default taxonomy
$taxonomy = 'category';
// Add filter to change the default taxonomy
$taxonomy = apply_filters( 'wpmediacategory_taxonomy', $taxonomy );
if ( $taxonomy == 'category' ) {
if ( ! taxonomy_exists( 'category' ) )
return false;
$new_arg = &$wp_taxonomies['category']->update_count_callback;
$new_arg = 'wpmediacategory_update_count_callback';
}
}
add_action( 'init', 'wpmediacategory_change_category_update_count_callback', 100 );
/** custom gallery shortcode */
function wpmediacategory_gallery_atts( $result, $defaults, $atts ) {
if ( isset( $atts['category'] ) ) {
// Default taxonomy
$taxonomy = 'category';
// Add filter to change the default taxonomy
$taxonomy = apply_filters( 'wpmediacategory_taxonomy', $taxonomy );
$category = $atts['category'];
// category slug?
if ( ! is_numeric( $category ) ) {
if ( $taxonomy != 'category' ) {
$term = get_term_by( 'slug', $category, $taxonomy );
if ( false !== $term ) {
$category = $term->term_id;
} else {
// not existing category slug
$category = '';
}
} else {
$categoryObject = get_category_by_slug( $category );
if ( false !== $categoryObject ) {
$category = $categoryObject->term_id;
} else {
// not existing category slug
$category = '';
}
}
}
if ( $category != '' ) {
$ids_new = array();
if ( $taxonomy != 'category' ) {
$args = array(
'post_type' => 'attachment',
'numberposts' => -1,
'post_status' => null,
'tax_query' => array(
array(
'taxonomy' => $taxonomy,
'field' => 'id',
'terms' => $category
)
)
);
} else {
$args = array(
'post_type' => 'attachment',
'numberposts' => -1,
'post_status' => null,
'category' => $category
);
}
$attachments = get_posts( $args );
if ( ! empty( $attachments ) ) {
// ids attribute already present?
if ( isset( $atts['ids'] ) ) {
$ids_old = explode( ',', $atts['ids'] );
foreach ( $attachments as $attachment ) {
// preserve id if in the selected category
if ( in_array( $attachment->ID, $ids_old ) ) {
$ids_new[] = $attachment->ID;
}
}
} else {
foreach ( $attachments as $attachment ) {
$ids_new[] = $attachment->ID;
}
}
$atts['ids'] = $ids_new;
} else {
$atts['ids'] = -1; // don't display images if category is empty
}
}
$result['include'] = implode( ',', $atts['ids'] );
$result['category'] = $atts['category'];
}
return $result;
}
add_filter( 'shortcode_atts_gallery', 'wpmediacategory_gallery_atts', 10, 3 );
// load code that is only needed in the admin section
if ( is_admin() ) {
/** Handle default category of attachments without category */
function wpmediacategory_set_attachment_category( $post_ID ) {
// default taxonomy
$taxonomy = 'category';
// add filter to change the default taxonomy
$taxonomy = apply_filters( 'wpmediacategory_taxonomy', $taxonomy );
// if attachment already have categories, stop here
if ( wp_get_object_terms( $post_ID, $taxonomy ) )
return;
// no, then get the default one
$post_category = array( get_option('default_category') );
// then set category if default category is set on writting page
if ( $post_category )
wp_set_post_categories( $post_ID, $post_category );
}
add_action( 'add_attachment', 'wpmediacategory_set_attachment_category' );
add_action( 'edit_attachment', 'wpmediacategory_set_attachment_category' );
/** Custom walker for wp_dropdown_categories, based on https://gist.github.com/stephenh1988/2902509 */
class wpmediacategory_walker_category_filter extends Walker_CategoryDropdown{
function start_el( &$output, $category, $depth = 0, $args = array(), $id = 0 ) {
$pad = str_repeat( ' ', $depth * 3 );
$cat_name = apply_filters( 'list_cats', $category->name, $category );
if( ! isset( $args['value'] ) ) {
$args['value'] = ( $category->taxonomy != 'category' ? 'slug' : 'id' );
}
$value = ( $args['value']=='slug' ? $category->slug : $category->term_id );
$output .= '<option class="level-' . $depth . '" value="' . $value . '"';
if ( $value === (string) $args['selected'] ) {
$output .= ' selected="selected"';
}
$output .= '>';
$output .= $pad . $cat_name;
if ( $args['show_count'] )
$output .= ' (' . $category->count . ')';
$output .= "</option>\n";
}
}
/** Add a category filter */
function wpmediacategory_add_category_filter() {
global $pagenow;
if ( 'upload.php' == $pagenow ) {
// Default taxonomy
$taxonomy = 'category';
// Add filter to change the default taxonomy
$taxonomy = apply_filters( 'wpmediacategory_taxonomy', $taxonomy );
if ( $taxonomy != 'category' ) {
$dropdown_options = array(
'taxonomy' => $taxonomy,
'name' => $taxonomy,
'show_option_all' => __( 'View all categories' ),
'hide_empty' => false,
'hierarchical' => true,
'orderby' => 'name',
'show_count' => true,
'walker' => new wpmediacategory_walker_category_filter(),
'value' => 'slug'
);
} else {
$dropdown_options = array(
'taxonomy' => $taxonomy,
'show_option_all' => __( 'View all categories' ),
'hide_empty' => false,
'hierarchical' => true,
'orderby' => 'name',
'show_count' => false,
'walker' => new wpmediacategory_walker_category_filter(),
'value' => 'id'
);
}
wp_dropdown_categories( $dropdown_options );
}
}
add_action( 'restrict_manage_posts', 'wpmediacategory_add_category_filter' );
/** Add custom Bulk Action to the select menus */
function wpmediacategory_custom_bulk_admin_footer() {
// default taxonomy
$taxonomy = 'category';
// add filter to change the default taxonomy
$taxonomy = apply_filters( 'wpmediacategory_taxonomy', $taxonomy );
$terms = get_terms( $taxonomy, 'hide_empty=0' );
if ( $terms && ! is_wp_error( $terms ) ) :
echo '<script type="text/javascript">';
echo 'jQuery(window).load(function() {';
echo 'jQuery(\'<optgroup id="wpmediacategory_optgroup1" label="' . html_entity_decode( __( 'Categories' ), ENT_QUOTES, 'UTF-8' ) . '">\').appendTo("select[name=\'action\']");';
echo 'jQuery(\'<optgroup id="wpmediacategory_optgroup2" label="' . html_entity_decode( __( 'Categories' ), ENT_QUOTES, 'UTF-8' ) . '">\').appendTo("select[name=\'action2\']");';
// add categories
foreach ( $terms as $term ) {
$sTxtAdd = esc_js( __( 'Add' ) . ': ' . $term->name );
echo "jQuery('<option>').val('wpmediacategory_add_" . $term->term_taxonomy_id . "').text('" . $sTxtAdd . "').appendTo('#wpmediacategory_optgroup1');";
echo "jQuery('<option>').val('wpmediacategory_add_" . $term->term_taxonomy_id . "').text('" . $sTxtAdd . "').appendTo('#wpmediacategory_optgroup2');";
}
// remove categories
foreach ( $terms as $term ) {
$sTxtRemove = esc_js( __( 'Remove' ) . ': ' . $term->name );
echo "jQuery('<option>').val('wpmediacategory_remove_" . $term->term_taxonomy_id . "').text('" . $sTxtRemove . "').appendTo('#wpmediacategory_optgroup1');";
echo "jQuery('<option>').val('wpmediacategory_remove_" . $term->term_taxonomy_id . "').text('" . $sTxtRemove . "').appendTo('#wpmediacategory_optgroup2');";
}
// remove all categories
echo "jQuery('<option>').val('wpmediacategory_remove_0').text('" . esc_js( __( 'Delete all' ) ) . "').appendTo('#wpmediacategory_optgroup1');";
echo "jQuery('<option>').val('wpmediacategory_remove_0').text('" . esc_js( __( 'Delete all' ) ) . "').appendTo('#wpmediacategory_optgroup2');";
echo "});";
echo "</script>";
endif;
}
add_action( 'admin_footer-upload.php', 'wpmediacategory_custom_bulk_admin_footer' );
/** Handle the custom Bulk Action */
function wpmediacategory_custom_bulk_action() {
global $wpdb;
if ( ! isset( $_REQUEST['action'] ) ) {
return;
}
// is it a category?
$sAction = ( $_REQUEST['action'] != -1 ) ? $_REQUEST['action'] : $_REQUEST['action2'];
if ( substr( $sAction, 0, 16 ) != 'wpmediacategory_' ) {
return;
}
// security check
check_admin_referer( 'bulk-media' );
// make sure ids are submitted. depending on the resource type, this may be 'media' or 'post'
if( isset( $_REQUEST['media'] ) ) {
$post_ids = array_map( 'intval', $_REQUEST['media'] );
}
if( empty( $post_ids ) ) {
return;
}
$sendback = admin_url( "upload.php?editCategory=1" );
// remember pagenumber
$pagenum = isset( $_REQUEST['paged'] ) ? absint( $_REQUEST['paged'] ) : 0;
$sendback = add_query_arg( 'paged', $pagenum, $sendback );
// remember orderby
if ( isset( $_REQUEST['orderby'] ) ) {
$sOrderby = $_REQUEST['orderby'];
$sendback = add_query_arg( 'orderby', $sOrderby, $sendback );
}
// remember order
if ( isset( $_REQUEST['order'] ) ) {
$sOrder = $_REQUEST['order'];
$sendback = add_query_arg( 'order', $sOrder, $sendback );
}
// remember author
if ( isset( $_REQUEST['author'] ) ) {
$sOrderby = $_REQUEST['author'];
$sendback = add_query_arg( 'author', $sOrderby, $sendback );
}
foreach( $post_ids as $post_id ) {
if ( is_numeric( str_replace( 'wpmediacategory_add_', '', $sAction ) ) ) {
$nCategory = str_replace( 'wpmediacategory_add_', '', $sAction );
// update or insert category
$wpdb->replace( $wpdb->term_relationships,
array(
'object_id' => $post_id,
'term_taxonomy_id' => $nCategory
),
array(
'%d',
'%d'
)
);
} else if ( is_numeric( str_replace( 'wpmediacategory_remove_', '', $sAction ) ) ) {
$nCategory = str_replace( 'wpmediacategory_remove_', '', $sAction );
// remove all categories
if ( $nCategory == 0 ) {
$wpdb->delete( $wpdb->term_relationships,
array(
'object_id' => $post_id
),
array(
'%d'
)
);
// remove category
} else {
$wpdb->delete( $wpdb->term_relationships,
array(
'object_id' => $post_id,
'term_taxonomy_id' => $nCategory
),
array(
'%d',
'%d'
)
);
}
}
}
wpmediacategory_update_count_callback();
wp_redirect( $sendback );
exit();
}
add_action( 'load-upload.php', 'wpmediacategory_custom_bulk_action' );
/** Display an admin notice on the page after changing category */
function wpmediacategory_custom_bulk_admin_notices() {
global $post_type, $pagenow;
if ( $pagenow == 'upload.php' && $post_type == 'attachment' && isset( $_GET['editCategory'] ) ) {
echo '<div class="updated"><p>' . __( 'Settings saved.' ) . '</p></div>';
}
}
add_action( 'admin_notices', 'wpmediacategory_custom_bulk_admin_notices' );
/** Add a link to media categories on the plugin page */
function wpmediacategory_add_plugin_action_links( $links ) {
// default taxonomy
$taxonomy = 'category';
// add filter to change the default taxonomy
$taxonomy = apply_filters( 'wpmediacategory_taxonomy', $taxonomy );
return array_merge(
array(
'settings' => '<a href="' . get_bloginfo( 'wpurl' ) . '/wp-admin/edit-tags.php?taxonomy=' . $taxonomy . '&post_type=attachment">' . __( 'Categories' ) . '</a>',
'premium' => '<a href="http://codecanyon.net/item/media-library-categories-premium/6691290?ref=jeffrey-wp">' . __( 'Get Premium Version' ) . '</a>'
),
$links
);
}
add_filter( 'plugin_action_links_' . plugin_basename( __FILE__ ), 'wpmediacategory_add_plugin_action_links' );
/** Changing categories in the 'grid view' */
function wpmediacategory_ajax_query_attachments() {
if ( ! current_user_can( 'upload_files' ) ) {
wp_send_json_error();
}
$taxonomies = get_object_taxonomies( 'attachment', 'names' );
$query = isset( $_REQUEST['query'] ) ? (array) $_REQUEST['query'] : array();
$defaults = array(
's', 'order', 'orderby', 'posts_per_page', 'paged', 'post_mime_type',
'post_parent', 'post__in', 'post__not_in'
);
$query = array_intersect_key( $query, array_flip( array_merge( $defaults, $taxonomies ) ) );
$query['post_type'] = 'attachment';
$query['post_status'] = 'inherit';
if ( current_user_can( get_post_type_object( 'attachment' )->cap->read_private_posts ) )
$query['post_status'] .= ',private';
$query['tax_query'] = array( 'relation' => 'AND' );
foreach ( $taxonomies as $taxonomy ) {
if ( isset( $query[$taxonomy] ) && is_numeric( $query[$taxonomy] ) ) {
array_push( $query['tax_query'], array(
'taxonomy' => $taxonomy,
'field' => 'id',
'terms' => $query[$taxonomy]
));
}
unset ( $query[$taxonomy] );
}
$query = apply_filters( 'ajax_query_attachments_args', $query );
$query = new WP_Query( $query );
$posts = array_map( 'wp_prepare_attachment_for_js', $query->posts );
$posts = array_filter( $posts );
wp_send_json_success( $posts );
}
add_action( 'wp_ajax_query-attachments', 'wpmediacategory_ajax_query_attachments', 0 );
/** Enqueue admin scripts and styles */
function wpmediacategory_enqueue_media_action() {
global $pagenow;
if ( wp_script_is( 'media-editor' ) && 'upload.php' == $pagenow ) {
// Default taxonomy
$taxonomy = 'category';
// Add filter to change the default taxonomy
$taxonomy = apply_filters( 'wpmediacategory_taxonomy', $taxonomy );
if ( $taxonomy != 'category' ) {
$dropdown_options = array(
'taxonomy' => $taxonomy,
'hide_empty' => false,
'hierarchical' => true,
'orderby' => 'name',
'show_count' => true,
'walker' => new wpmediacategory_walker_category_mediagridfilter(),
'value' => 'id',
'echo' => false
);
} else {
$dropdown_options = array(
'taxonomy' => $taxonomy,
'hide_empty' => false,
'hierarchical' => true,
'orderby' => 'name',
'show_count' => false,
'walker' => new wpmediacategory_walker_category_mediagridfilter(),
'value' => 'id',
'echo' => false
);
}
$attachment_terms = wp_dropdown_categories( $dropdown_options );
$attachment_terms = preg_replace( array( "/<select([^>]*)>/", "/<\/select>/" ), "", $attachment_terms );
echo '<script type="text/javascript">';
echo '/* <![CDATA[ */';
echo 'var wpmediacategory_taxonomies = {"' . $taxonomy . '":{"list_title":"' . html_entity_decode( __( 'View all categories' ), ENT_QUOTES, 'UTF-8' ) . '","term_list":[' . substr( $attachment_terms, 2 ) . ']}};';
echo '/* ]]> */';
echo '</script>';
wp_enqueue_script( 'wpmediacategory-media-views', plugins_url( 'js/wpmediacategory-media-views.min.js', __FILE__ ), array( 'media-views' ), '1.4.15', true );
}
}
add_action( 'admin_enqueue_scripts', 'wpmediacategory_enqueue_media_action' );
/** Custom walker for wp_dropdown_categories for media grid view filter */
class wpmediacategory_walker_category_mediagridfilter extends Walker_CategoryDropdown {
function start_el( &$output, $category, $depth = 0, $args = array(), $id = 0 ) {
$pad = str_repeat( ' ', $depth * 3 );
$cat_name = apply_filters( 'list_cats', $category->name, $category );
// {"term_id":"1","term_name":"no category"}
$output .= ',{"term_id":"' . $category->term_id . '",';
$output .= '"term_name":"' . $pad . esc_attr( $cat_name );
if ( $args['show_count'] ) {
$output .= ' ('. $category->count .')';
}
$output .= '"}';
}
}
}
?>
