<?php

/**

 * WordPress Taxonomy Administration API.

 *

 * @package WordPress

 * @subpackage Administration

 */

//

// Category

//

/**

 * {@internal Missing Short Description}}

 *

 * @since 2.0.0

 *

 * @param unknown_type $cat_name

 * @return unknown

 */

function category_exists($cat_name, $parent = 0) {

	$id = term_exists($cat_name, 'category', $parent);

	if ( is_array($id) )

		$id = $id['term_id'];

	return $id;

}

/**

 * {@internal Missing Short Description}}

 *

 * @since 2.0.0

 *

 * @param unknown_type $id

 * @return unknown

 */

function get_category_to_edit( $id ) {

	$category = get_term( $id, 'category', OBJECT, 'edit' );

	_make_cat_compat( $category );

	return $category;

}

/**

 * {@internal Missing Short Description}}

 *

 * @since 2.0.0

 *

 * @param unknown_type $cat_name

 * @param unknown_type $parent

 * @return unknown

 */

function wp_create_category( $cat_name, $parent = 0 ) {

	if ( $id = category_exists($cat_name, $parent) )

		return $id;

	return wp_insert_category( array('cat_name' => $cat_name, 'category_parent' => $parent) );

}

/**

 * {@internal Missing Short Description}}

 *

 * @since 2.0.0

 *

 * @param unknown_type $categories

 * @param unknown_type $post_id

 * @return unknown

 */

function wp_create_categories($categories, $post_id = '') {

	$cat_ids = array ();

	foreach ($categories as $category) {

		if ($id = category_exists($category))

			$cat_ids[] = $id;

		else

			if ($id = wp_create_category($category))

				$cat_ids[] = $id;

	}

	if ( $post_id )

		wp_set_post_categories($post_id, $cat_ids);

	return $cat_ids;

}

/**

 * Updates an existing Category or creates a new Category.

 *

 * @since 2.0.0

 *

 * @param mixed $catarr See defaults below. Set 'cat_ID' to a non-zero value to update an existing category. The 'taxonomy' key was added in 3.0.0.

 * @param bool $wp_error Optional, since 2.5.0. Set this to true if the caller handles WP_Error return values.

 * @return int|object The ID number of the new or updated Category on success. Zero or a WP_Error on failure, depending on param $wp_error.

 */

function wp_insert_category($catarr, $wp_error = false) {

	$cat_defaults = array('cat_ID' => 0, 'taxonomy' => 'category', 'cat_name' => '', 'category_description' => '', 'category_nicename' => '', 'category_parent' => '');

	$catarr = wp_parse_args($catarr, $cat_defaults);

	extract($catarr, EXTR_SKIP);

	if ( trim( $cat_name ) == '' ) {

		if ( ! $wp_error )

			return 0;

		else

			return new WP_Error( 'cat_name', __('You did not enter a category name.') );

	}

	$cat_ID = (int) $cat_ID;

	// Are we updating or creating?

	if ( !empty ($cat_ID) )

		$update = true;

	else

		$update = false;

	$name = $cat_name;

	$description = $category_description;

	$slug = $category_nicename;

	$parent = $category_parent;

	$parent = (int) $parent;

	if ( $parent < 0 )

		$parent = 0;

	if ( empty( $parent ) || ! term_exists( $parent, $taxonomy ) || ( $cat_ID && term_is_ancestor_of( $cat_ID, $parent, $taxonomy ) ) )

		$parent = 0;

	$args = compact('name', 'slug', 'parent', 'description');

	if ( $update )

		$cat_ID = wp_update_term($cat_ID, $taxonomy, $args);

	else

		$cat_ID = wp_insert_term($cat_name, $taxonomy, $args);

	if ( is_wp_error($cat_ID) ) {

		if ( $wp_error )

			return $cat_ID;

		else

			return 0;

	}

	return $cat_ID['term_id'];

}

/**

 * Aliases wp_insert_category() with minimal args.

 *

 * If you want to update only some fields of an existing category, call this

 * function with only the new values set inside $catarr.

 *

 * @since 2.0.0

 *

 * @param array $catarr The 'cat_ID' value is required. All other keys are optional.

 * @return int|bool The ID number of the new or updated Category on success. Zero or FALSE on failure.

 */

function wp_update_category($catarr) {

	$cat_ID = (int) $catarr['cat_ID'];

	if ( isset($catarr['category_parent']) && ($cat_ID == $catarr['category_parent']) )

		return false;

	// First, get all of the original fields

	$category = get_term( $cat_ID, 'category', ARRAY_A );

	_make_cat_compat( $category );

	// Escape data pulled from DB.

	$category = wp_slash($category);

	// Merge old and new fields with new fields overwriting old ones.

	$catarr = array_merge($category, $catarr);

	return wp_insert_category($catarr);

}

//

// Tags

//

/**

 * {@internal Missing Short Description}}

 *

 * @since 2.3.0

 *

 * @param unknown_type $tag_name

 * @return unknown

 */

function tag_exists($tag_name) {

	return term_exists($tag_name, 'post_tag');

}

/**

 * {@internal Missing Short Description}}

 *

 * @since 2.3.0

 *

 * @param unknown_type $tag_name

 * @return unknown

 */

function wp_create_tag($tag_name) {

	return wp_create_term( $tag_name, 'post_tag');

}

/**

 * {@internal Missing Short Description}}

 *

 * @since 2.3.0

 *

 * @param unknown_type $post_id

 * @return unknown

 */

function get_tags_to_edit( $post_id, $taxonomy = 'post_tag' ) {

	return get_terms_to_edit( $post_id, $taxonomy);

}

/**

 * {@internal Missing Short Description}}

 *

 * @since 2.8.0

 *

 * @param unknown_type $post_id

 * @return unknown

 */

function get_terms_to_edit( $post_id, $taxonomy = 'post_tag' ) {

	$post_id = (int) $post_id;

	if ( !$post_id )

		return false;

	$tags = wp_get_post_terms($post_id, $taxonomy, array());

	if ( !$tags )

		return false;

	if ( is_wp_error($tags) )

		return $tags;

	foreach ( $tags as $tag )

		$tag_names[] = $tag->name;

	$tags_to_edit = join( ',', $tag_names );

	$tags_to_edit = esc_attr( $tags_to_edit );

	$tags_to_edit = apply_filters( 'terms_to_edit', $tags_to_edit, $taxonomy );

	return $tags_to_edit;

}

/**

 * {@internal Missing Short Description}}

 *

 * @since 2.8.0

 *

 * @param unknown_type $tag_name

 * @return unknown

 */

function wp_create_term($tag_name, $taxonomy = 'post_tag') {

	if ( $id = term_exists($tag_name, $taxonomy) )

		return $id;

	return wp_insert_term($tag_name, $taxonomy);

}