241 lines
6.9 KiB
PHP
241 lines
6.9 KiB
PHP
<?php
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class WP_Categories_to_Tags {
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var $categories_to_convert = array();
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var $all_categories = array();
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function header() {
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echo '<div class="wrap">';
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echo '<h2>' . __('Convert Categories to Tags') . '</h2>';
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}
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function footer() {
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echo '</div>';
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}
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function populate_all_categories() {
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global $wpdb;
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$categories = get_categories('get=all');
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foreach ( $categories as $category ) {
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if ( !tag_exists($wpdb->escape($category->name)) )
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$this->all_categories[] = $category;
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}
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}
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function welcome() {
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$this->populate_all_categories();
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echo '<div class="narrow">';
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if (count($this->all_categories) > 0) {
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echo '<p>' . __('Hey there. Here you can selectively converts existing categories to tags. To get started, check the categories you wish to be converted, then click the Convert button.') . '</p>';
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echo '<p>' . __('Keep in mind that if you convert a category with child categories, the children become top-level orphans.') . '</p>';
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$this->categories_form();
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} else {
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echo '<p>'.__('You have no categories to convert!').'</p>';
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}
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echo '</div>';
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}
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function categories_form() {
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?>
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<script type="text/javascript">
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<!--
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var checkflag = "false";
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function check_all_rows() {
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field = document.formlist;
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if ( 'false' == checkflag ) {
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for ( i = 0; i < field.length; i++ ) {
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if ( 'cats_to_convert[]' == field[i].name )
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field[i].checked = true;
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}
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checkflag = 'true';
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return '<?php _e('Uncheck All') ?>';
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} else {
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for ( i = 0; i < field.length; i++ ) {
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if ( 'cats_to_convert[]' == field[i].name )
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field[i].checked = false;
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}
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checkflag = 'false';
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return '<?php _e('Check All') ?>';
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}
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}
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// -->
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</script>
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<?php
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echo '<form name="formlist" id="formlist" action="admin.php?import=wp-cat2tag&step=2" method="post">
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<p><input type="button" value="' . __('Check All') . '"' . ' onClick="this.value=check_all_rows()"></p>';
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wp_nonce_field('import-cat2tag');
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echo '<ul style="list-style:none">';
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$hier = _get_term_hierarchy('category');
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foreach ($this->all_categories as $category) {
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$category = sanitize_term( $category, 'category', 'display' );
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if ((int) $category->parent == 0) {
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echo '<li><label><input type="checkbox" name="cats_to_convert[]" value="' . intval($category->term_id) . '" /> ' . $category->name . ' (' . $category->count . ')</label>';
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if (isset($hier[$category->term_id])) {
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$this->_category_children($category, $hier);
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}
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echo '</li>';
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}
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}
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echo '</ul>';
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echo '<p class="submit"><input type="submit" name="submit" value="' . __('Convert Tags »') . '" /></p>';
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echo '</form>';
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}
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function _category_children($parent, $hier) {
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echo '<ul style="list-style:none">';
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foreach ($hier[$parent->term_id] as $child_id) {
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$child =& get_category($child_id);
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echo '<li><label><input type="checkbox" name="cats_to_convert[]" value="' . intval($child->term_id) . '" /> ' . $child->name . ' (' . $child->count . ')</label>';
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if (isset($hier[$child->term_id])) {
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$this->_category_children($child, $hier);
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}
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echo '</li>';
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}
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echo '</ul>';
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}
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function _category_exists($cat_id) {
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global $wpdb;
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$cat_id = (int) $cat_id;
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$maybe_exists = category_exists($cat_id);
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if ( $maybe_exists ) {
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return true;
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} else {
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return false;
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}
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}
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function convert_them() {
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global $wpdb;
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if ( (!isset($_POST['cats_to_convert']) || !is_array($_POST['cats_to_convert'])) && empty($this->categories_to_convert)) {
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echo '<div class="narrow">';
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echo '<p>' . sprintf(__('Uh, oh. Something didn’t work. Please <a href="%s">try again</a>.'), 'admin.php?import=wp-cat2tag') . '</p>';
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echo '</div>';
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return;
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}
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if ( empty($this->categories_to_convert) )
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$this->categories_to_convert = $_POST['cats_to_convert'];
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$hier = _get_term_hierarchy('category');
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echo '<ul>';
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foreach ( (array) $this->categories_to_convert as $cat_id) {
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$cat_id = (int) $cat_id;
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echo '<li>' . sprintf(__('Converting category #%s ... '), $cat_id);
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if (!$this->_category_exists($cat_id)) {
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_e('Category doesn\'t exist!');
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} else {
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$category =& get_category($cat_id);
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if ( tag_exists($wpdb->escape($category->name)) ) {
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_e('Category is already a tag.');
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echo '</li>';
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continue;
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}
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// If the category is the default, leave category in place and create tag.
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if ( get_option('default_category') == $category->term_id ) {
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$id = wp_insert_term($category->name, 'post_tag', array('slug' => $category->slug));
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$id = $id['term_taxonomy_id'];
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$posts = get_objects_in_term($category->term_id, 'category');
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foreach ( $posts as $post ) {
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if ( !$wpdb->get_var("SELECT object_id FROM $wpdb->term_relationships WHERE object_id = '$post' AND term_taxonomy_id = '$id'") )
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$wpdb->query("INSERT INTO $wpdb->term_relationships (object_id, term_taxonomy_id) VALUES ('$post', '$id')");
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clean_post_cache($post);
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}
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} else {
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$tt_ids = $wpdb->get_col("SELECT term_taxonomy_id FROM $wpdb->term_taxonomy WHERE term_id = '{$category->term_id}' AND taxonomy = 'category'");
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if ( $tt_ids ) {
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$posts = $wpdb->get_col("SELECT object_id FROM $wpdb->term_relationships WHERE term_taxonomy_id IN (" . join(',', $tt_ids) . ") GROUP BY object_id");
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foreach ( (array) $posts as $post )
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clean_post_cache($post);
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}
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// Change the category to a tag.
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$wpdb->query("UPDATE $wpdb->term_taxonomy SET taxonomy = 'post_tag' WHERE term_id = '{$category->term_id}' AND taxonomy = 'category'");
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$terms = $wpdb->get_col("SELECT term_id FROM $wpdb->term_taxonomy WHERE parent = '{$category->term_id}' AND taxonomy = 'category'");
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foreach ( (array) $terms as $term )
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clean_category_cache($term);
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// Set all parents to 0 (root-level) if their parent was the converted tag
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$wpdb->query("UPDATE $wpdb->term_taxonomy SET parent = 0 WHERE parent = '{$category->term_id}' AND taxonomy = 'category'");
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}
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// Clean the cache
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clean_category_cache($category->term_id);
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_e('Converted successfully.');
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}
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echo '</li>';
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}
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echo '</ul>';
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echo '<p>' . sprintf( __('We’re all done here, but you can always <a href="%s">convert more</a>.'), 'admin.php?import=wp-cat2tag' ) . '</p>';
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}
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function init() {
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$step = (isset($_GET['step'])) ? (int) $_GET['step'] : 1;
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$this->header();
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if (!current_user_can('manage_categories')) {
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echo '<div class="narrow">';
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echo '<p>' . __('Cheatin’ uh?') . '</p>';
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echo '</div>';
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} else {
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if ( $step > 1 )
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check_admin_referer('import-cat2tag');
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switch ($step) {
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case 1 :
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$this->welcome();
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break;
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case 2 :
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$this->convert_them();
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break;
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}
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}
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$this->footer();
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}
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function WP_Categories_to_Tags() {
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// Do nothing.
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}
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}
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$wp_cat2tag_importer = new WP_Categories_to_Tags();
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register_importer('wp-cat2tag', __('Categories to Tags Converter'), __('Convert existing categories to tags, selectively.'), array(&$wp_cat2tag_importer, 'init'));
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?>
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