303 lines
9.2 KiB
PHP
303 lines
9.2 KiB
PHP
<?php
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function get_all_category_ids() {
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global $wpdb;
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if ( ! $cat_ids = wp_cache_get('all_category_ids', 'category') ) {
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$cat_ids = $wpdb->get_col("SELECT cat_ID FROM $wpdb->categories");
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wp_cache_add('all_category_ids', $cat_ids, 'category');
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}
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return $cat_ids;
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}
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function &get_categories($args = '') {
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global $wpdb, $category_links;
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if ( is_array($args) )
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$r = &$args;
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else
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parse_str($args, $r);
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$defaults = array('type' => 'post', 'child_of' => 0, 'orderby' => 'name', 'order' => 'ASC',
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'hide_empty' => true, 'include_last_update_time' => false, 'hierarchical' => 1, 'exclude' => '', 'include' => '',
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'number' => '', 'pad_counts' => false);
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$r = array_merge($defaults, $r);
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if ( 'count' == $r['orderby'] )
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$r['orderby'] = 'category_count';
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else
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$r['orderby'] = "cat_" . $r['orderby']; // restricts order by to cat_ID and cat_name fields
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$r['number'] = (int) $r['number'];
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extract($r);
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$key = md5( serialize( $r ) );
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if ( $cache = wp_cache_get( 'get_categories', 'category' ) )
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if ( isset( $cache[ $key ] ) )
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return $cache[ $key ];
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$where = 'cat_ID > 0';
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$inclusions = '';
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if ( !empty($include) ) {
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$child_of = 0; //ignore child_of and exclude params if using include
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$exclude = '';
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$incategories = preg_split('/[\s,]+/',$include);
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if ( count($incategories) ) {
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foreach ( $incategories as $incat ) {
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if (empty($inclusions))
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$inclusions = ' AND ( cat_ID = ' . intval($incat) . ' ';
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else
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$inclusions .= ' OR cat_ID = ' . intval($incat) . ' ';
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}
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}
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}
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if (!empty($inclusions))
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$inclusions .= ')';
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$where .= $inclusions;
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$exclusions = '';
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if ( !empty($exclude) ) {
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$excategories = preg_split('/[\s,]+/',$exclude);
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if ( count($excategories) ) {
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foreach ( $excategories as $excat ) {
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if (empty($exclusions))
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$exclusions = ' AND ( cat_ID <> ' . intval($excat) . ' ';
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else
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$exclusions .= ' AND cat_ID <> ' . intval($excat) . ' ';
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// TODO: Exclude children of excluded cats? Note: children are getting excluded
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}
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}
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}
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if (!empty($exclusions))
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$exclusions .= ')';
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$exclusions = apply_filters('list_cats_exclusions', $exclusions, $r );
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$where .= $exclusions;
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if ( $hide_empty && !$hierarchical ) {
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if ( 'link' == $type )
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$where .= ' AND link_count > 0';
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else
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$where .= ' AND category_count > 0';
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}
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if ( !empty($number) )
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$number = 'LIMIT ' . $number;
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else
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$number = '';
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$categories = $wpdb->get_results("SELECT * FROM $wpdb->categories WHERE $where ORDER BY $orderby $order $number");
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if ( empty($categories) )
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return array();
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// TODO: Integrate this into the main query.
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if ( $include_last_update_time ) {
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$stamps = $wpdb->get_results("SELECT category_id, UNIX_TIMESTAMP( MAX(post_date) ) AS ts FROM $wpdb->posts, $wpdb->post2cat, $wpdb->categories
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WHERE post_status = 'publish' AND post_id = ID AND $where GROUP BY category_id");
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global $cat_stamps;
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foreach ($stamps as $stamp)
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$cat_stamps[$stamp->category_id] = $stamp->ts;
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function stamp_cat($cat) {
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global $cat_stamps;
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$cat->last_update_timestamp = $cat_stamps[$cat->cat_ID];
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return $cat;
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}
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$categories = array_map('stamp_cat', $categories);
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unset($cat_stamps);
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}
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if ( $child_of || $hierarchical )
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$categories = & _get_cat_children($child_of, $categories);
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// Update category counts to include children.
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if ( $pad_counts )
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_pad_category_counts($type, $categories);
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// Make sure we show empty categories that have children.
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if ( $hierarchical && $hide_empty ) {
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foreach ( $categories as $k => $category ) {
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if ( ! $category->{'link' == $type ? 'link_count' : 'category_count'} ) {
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$children = _get_cat_children($category->cat_ID, $categories);
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foreach ( $children as $child )
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if ( $child->{'link' == $type ? 'link_count' : 'category_count'} )
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continue 2;
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// It really is empty
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unset($categories[$k]);
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}
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}
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}
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reset ( $categories );
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$cache[ $key ] = $categories;
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wp_cache_set( 'get_categories', $cache, 'category' );
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return apply_filters('get_categories', $categories, $r);
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}
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// Retrieves category data given a category ID or category object.
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// Handles category caching.
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function &get_category(&$category, $output = OBJECT) {
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global $wpdb;
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if ( empty($category) )
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return null;
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if ( is_object($category) ) {
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wp_cache_add($category->cat_ID, $category, 'category');
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$_category = $category;
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} else {
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if ( ! $_category = wp_cache_get($category, 'category') ) {
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$_category = $wpdb->get_row("SELECT * FROM $wpdb->categories WHERE cat_ID = '$category' LIMIT 1");
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wp_cache_add($category, $_category, 'category');
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}
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}
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$_category = apply_filters('get_category', $_category);
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if ( $output == OBJECT ) {
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return $_category;
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} elseif ( $output == ARRAY_A ) {
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return get_object_vars($_category);
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} elseif ( $output == ARRAY_N ) {
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return array_values(get_object_vars($_category));
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} else {
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return $_category;
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}
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}
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function get_category_by_path($category_path, $full_match = true, $output = OBJECT) {
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global $wpdb;
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$category_path = rawurlencode(urldecode($category_path));
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$category_path = str_replace('%2F', '/', $category_path);
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$category_path = str_replace('%20', ' ', $category_path);
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$category_paths = '/' . trim($category_path, '/');
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$leaf_path = sanitize_title(basename($category_paths));
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$category_paths = explode('/', $category_paths);
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$full_path = '';
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foreach ( (array) $category_paths as $pathdir )
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$full_path .= ( $pathdir != '' ? '/' : '' ) . sanitize_title($pathdir);
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$categories = $wpdb->get_results("SELECT cat_ID, category_nicename, category_parent FROM $wpdb->categories WHERE category_nicename = '$leaf_path'");
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if ( empty($categories) )
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return NULL;
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foreach ($categories as $category) {
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$path = '/' . $leaf_path;
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$curcategory = $category;
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while ( ($curcategory->category_parent != 0) && ($curcategory->category_parent != $curcategory->cat_ID) ) {
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$curcategory = $wpdb->get_row("SELECT cat_ID, category_nicename, category_parent FROM $wpdb->categories WHERE cat_ID = '$curcategory->category_parent'");
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$path = '/' . $curcategory->category_nicename . $path;
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}
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if ( $path == $full_path )
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return get_category($category->cat_ID, $output);
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}
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// If full matching is not required, return the first cat that matches the leaf.
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if ( ! $full_match )
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return get_category($categories[0]->cat_ID, $output);
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return NULL;
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}
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// Get the ID of a category from its name
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function get_cat_ID($cat_name='General') {
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global $wpdb;
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$cid = $wpdb->get_var("SELECT cat_ID FROM $wpdb->categories WHERE cat_name='$cat_name'");
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return $cid?$cid:1; // default to cat 1
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}
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// Deprecate
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function get_catname($cat_ID) {
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return get_cat_name($cat_ID);
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}
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// Get the name of a category from its ID
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function get_cat_name($cat_id) {
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$cat_id = (int) $cat_id;
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$category = &get_category($cat_id);
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return $category->cat_name;
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}
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function cat_is_ancestor_of($cat1, $cat2) {
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if ( is_int($cat1) )
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$cat1 = & get_category($cat1);
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if ( is_int($cat2) )
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$cat2 = & get_category($cat2);
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if ( !$cat1->cat_ID || !$cat2->category_parent )
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return false;
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if ( $cat2->category_parent == $cat1->cat_ID )
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return true;
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return cat_is_ancestor_of($cat1, get_category($cat2->parent_category));
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}
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//
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// Private
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//
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function &_get_cat_children($category_id, $categories) {
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if ( empty($categories) )
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return array();
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$category_list = array();
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foreach ( $categories as $category ) {
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if ( $category->cat_ID == $category_id )
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continue;
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if ( $category->category_parent == $category_id ) {
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$category_list[] = $category;
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if ( $children = _get_cat_children($category->cat_ID, $categories) )
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$category_list = array_merge($category_list, $children);
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}
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}
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return $category_list;
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}
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// Recalculates link or post counts by including items from child categories
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// Assumes all relevant children are already in the $categories argument
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function _pad_category_counts($type, &$categories) {
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global $wpdb;
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// Set up some useful arrays
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foreach ( $categories as $key => $cat ) {
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$cats[$cat->cat_ID] = & $categories[$key];
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$cat_IDs[] = $cat->cat_ID;
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}
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// Get the relevant post2cat or link2cat records and stick them in a lookup table
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if ( $type == 'post' ) {
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$results = $wpdb->get_results("SELECT post_id, category_id FROM $wpdb->post2cat LEFT JOIN $wpdb->posts ON post_id = ID WHERE category_id IN (".join(',', $cat_IDs).") AND post_type = 'post' AND post_status = 'publish'");
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foreach ( $results as $row )
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++$cat_items[$row->category_id][$row->post_id];
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} else {
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$results = $wpdb->get_results("SELECT $wpdb->link2cat.link_id, category_id FROM $wpdb->link2cat LEFT JOIN $wpdb->links USING (link_id) WHERE category_id IN (".join(',', $cat_IDs).") AND link_visible = 'Y'");
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foreach ( $results as $row )
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++$cat_items[$row->category_id][$row->link_id];
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}
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// Touch every ancestor's lookup row for each post in each category
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foreach ( $cat_IDs as $cat_ID ) {
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$child = $cat_ID;
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while ( $parent = $cats[$child]->category_parent ) {
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if ( !empty($cat_items[$cat_ID]) )
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foreach ( $cat_items[$cat_ID] as $item_id => $touches )
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++$cat_items[$parent][$item_id];
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$child = $parent;
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}
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}
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// Transfer the touched cells
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foreach ( $cat_items as $id => $items )
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if ( isset($cats[$id]) )
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$cats[$id]->{'link' == $type ? 'link_count' : 'category_count'} = count($items);
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}
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?>
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