<?php
/**
 * WordPress Post Administration API.
 *
 * @package WordPress
 * @subpackage Administration
 */

/**
 * Rename $_POST data from form names to DB post columns.
 *
 * Manipulates $_POST directly.
 *
 * @package WordPress
 * @since 2.6.0
 *
 * @param bool $update Are we updating a pre-existing post?
 * @param post_data array Array of post data. Defaults to the contents of $_POST.
 * @return object|bool WP_Error on failure, true on success.
 */
function _wp_translate_postdata( $update = false, $post_data = null ) {

	if ( empty($post_data) )
		$post_data = &$_POST;

	if ( $update )
		$post_data['ID'] = (int) $post_data['post_ID'];
	$post_data['post_content'] = isset($post_data['content']) ? $post_data['content'] : '';
	$post_data['post_excerpt'] = isset($post_data['excerpt']) ? $post_data['excerpt'] : '';
	$post_data['post_parent'] = isset($post_data['parent_id'])? $post_data['parent_id'] : '';
	if ( isset($post_data['trackback_url']) )
		$post_data['to_ping'] = $post_data['trackback_url'];

	if (!empty ( $post_data['post_author_override'] ) ) {
		$post_data['post_author'] = (int) $post_data['post_author_override'];
	} else {
		if (!empty ( $post_data['post_author'] ) ) {
			$post_data['post_author'] = (int) $post_data['post_author'];
		} else {
			$post_data['post_author'] = (int) $post_data['user_ID'];
		}
	}

	if ( isset($post_data['user_ID']) && ($post_data['post_author'] != $post_data['user_ID']) ) {
		if ( 'page' == $post_data['post_type'] ) {
			if ( !current_user_can( 'edit_others_pages' ) ) {
				return new WP_Error( 'edit_others_pages', $update ?
					__( 'You are not allowed to edit pages as this user.' ) :
					__( 'You are not allowed to create pages as this user.' )
				);
			}
		} else {
			if ( !current_user_can( 'edit_others_posts' ) ) {
				return new WP_Error( 'edit_others_posts', $update ?
					__( 'You are not allowed to edit posts as this user.' ) :
					__( 'You are not allowed to post as this user.' )
				);
			}
		}
	}

	// What to do based on which button they pressed
	if ( isset($post_data['saveasdraft']) && '' != $post_data['saveasdraft'] )
		$post_data['post_status'] = 'draft';
	if ( isset($post_data['saveasprivate']) && '' != $post_data['saveasprivate'] )
		$post_data['post_status'] = 'private';
	if ( isset($post_data['publish']) && ( '' != $post_data['publish'] ) && ( $post_data['post_status'] != 'private' ) )
		$post_data['post_status'] = 'publish';
	if ( isset($post_data['advanced']) && '' != $post_data['advanced'] )
		$post_data['post_status'] = 'draft';
	if ( isset($post_data['pending']) && '' != $post_data['pending'] )
		$post_data['post_status'] = 'pending';

	$previous_status = get_post_field('post_status',  isset($post_data['ID']) ? $post_data['ID'] : $post_data['temp_ID']);

	// Posts 'submitted for approval' present are submitted to $_POST the same as if they were being published.
	// Change status from 'publish' to 'pending' if user lacks permissions to publish or to resave published posts.
	if ( 'page' == $post_data['post_type'] ) {
		$publish_cap = 'publish_pages';
		$edit_cap = 'edit_published_pages';
	} else {
		$publish_cap = 'publish_posts';
		$edit_cap = 'edit_published_posts';
	}
	if ( isset($post_data['post_status']) && ('publish' == $post_data['post_status'] && !current_user_can( $publish_cap )) )
		if ( $previous_status != 'publish' || !current_user_can( $edit_cap ) )
			$post_data['post_status'] = 'pending';

	if ( ! isset($post_data['post_status']) )
		$post_data['post_status'] = $previous_status;

	if (!isset( $post_data['comment_status'] ))
		$post_data['comment_status'] = 'closed';

	if (!isset( $post_data['ping_status'] ))
		$post_data['ping_status'] = 'closed';

	foreach ( array('aa', 'mm', 'jj', 'hh', 'mn') as $timeunit ) {
		if ( !empty( $post_data['hidden_' . $timeunit] ) && $post_data['hidden_' . $timeunit] != $post_data[$timeunit] ) {
			$post_data['edit_date'] = '1';
			break;
		}
	}

	if ( !empty( $post_data['edit_date'] ) ) {
		$aa = $post_data['aa'];
		$mm = $post_data['mm'];
		$jj = $post_data['jj'];
		$hh = $post_data['hh'];
		$mn = $post_data['mn'];
		$ss = $post_data['ss'];
		$aa = ($aa <= 0 ) ? date('Y') : $aa;
		$mm = ($mm <= 0 ) ? date('n') : $mm;
		$jj = ($jj > 31 ) ? 31 : $jj;
		$jj = ($jj <= 0 ) ? date('j') : $jj;
		$hh = ($hh > 23 ) ? $hh -24 : $hh;
		$mn = ($mn > 59 ) ? $mn -60 : $mn;
		$ss = ($ss > 59 ) ? $ss -60 : $ss;
		$post_data['post_date'] = sprintf( "%04d-%02d-%02d %02d:%02d:%02d", $aa, $mm, $jj, $hh, $mn, $ss );
		$post_data['post_date_gmt'] = get_gmt_from_date( $post_data['post_date'] );
	}

	return $post_data;
}

/**
 * Update an existing post with values provided in $_POST.
 *
 * @since unknown
 *
 * @param array $post_data Optional.
 * @return int Post ID.
 */
function edit_post( $post_data = null ) {

	if ( empty($post_data) )
		$post_data = &$_POST;

	$post_ID = (int) $post_data['post_ID'];

	if ( 'page' == $post_data['post_type'] ) {
		if ( !current_user_can( 'edit_page', $post_ID ) )
			wp_die( __('You are not allowed to edit this page.' ));
	} else {
		if ( !current_user_can( 'edit_post', $post_ID ) )
			wp_die( __('You are not allowed to edit this post.' ));
	}

	// Autosave shouldn't save too soon after a real save
	if ( 'autosave' == $post_data['action'] ) {
		$post =& get_post( $post_ID );
		$now = time();
		$then = strtotime($post->post_date_gmt . ' +0000');
		$delta = AUTOSAVE_INTERVAL / 2;
		if ( ($now - $then) < $delta )
			return $post_ID;
	}

	$post_data = _wp_translate_postdata( true, $post_data );
	if ( is_wp_error($post_data) )
		wp_die( $post_data->get_error_message() );

	if ( isset($post_data['visibility']) ) {
		switch ( $post_data['visibility'] ) {
			case 'public' :
				$post_data['post_password'] = '';
				break;
			case 'password' :
				unset( $post_data['sticky'] );
				break;
			case 'private' :
				$post_data['post_status'] = 'private';
				$post_data['post_password'] = '';
				unset( $post_data['sticky'] );
				break;
		}
	}

	// Meta Stuff
	if ( isset($post_data['meta']) && $post_data['meta'] ) {
		foreach ( $post_data['meta'] as $key => $value )
			update_meta( $key, $value['key'], $value['value'] );
	}

	if ( isset($post_data['deletemeta']) && $post_data['deletemeta'] ) {
		foreach ( $post_data['deletemeta'] as $key => $value )
			delete_meta( $key );
	}

	add_meta( $post_ID );

	wp_update_post( $post_data );

	// Reunite any orphaned attachments with their parent
	if ( !$draft_ids = get_user_option( 'autosave_draft_ids' ) )
		$draft_ids = array();
	if ( $draft_temp_id = (int) array_search( $post_ID, $draft_ids ) )
		_relocate_children( $draft_temp_id, $post_ID );

	// Now that we have an ID we can fix any attachment anchor hrefs
	_fix_attachment_links( $post_ID );

	wp_set_post_lock( $post_ID, $GLOBALS['current_user']->ID );

	if ( current_user_can( 'edit_others_posts' ) ) {
		if ( !empty($post_data['sticky']) )
			stick_post($post_ID);
		else
			unstick_post($post_ID);
	}

	return $post_ID;
}

/**
 * {@internal Missing Short Description}}
 *
 * Updates all bulk edited posts/pages, adding (but not removing) tags and
 * categories. Skips pages when they would be their own parent or child.
 *
 * @since unknown
 *
 * @return array
 */
function bulk_edit_posts( $post_data = null ) {
	global $wpdb;

	if ( empty($post_data) )
		$post_data = &$_POST;

	if ( 'page' == $post_data['post_type'] ) {
		if ( ! current_user_can( 'edit_pages' ) )
			wp_die( __('You are not allowed to edit pages.') );
	} else {
		if ( ! current_user_can( 'edit_posts' ) )
			wp_die( __('You are not allowed to edit posts.') );
	}

	$post_IDs = array_map( intval, (array) $post_data['post'] );

	$reset = array( 'post_author', 'post_status', 'post_password', 'post_parent', 'page_template', 'comment_status', 'ping_status', 'keep_private', 'tags_input', 'post_category', 'sticky' );
	foreach ( $reset as $field ) {
		if ( isset($post_data[$field]) && ( '' == $post_data[$field] || -1 == $post_data[$field] ) )
			unset($post_data[$field]);
	}

	if ( isset($post_data['post_category']) ) {
		if ( is_array($post_data['post_category']) && ! empty($post_data['post_category']) )
			$new_cats = array_map( absint, $post_data['post_category'] );
		else
			unset($post_data['post_category']);
	}

	if ( isset($post_data['tags_input']) ) {
		$new_tags = preg_replace( '/\s*,\s*/', ',', rtrim( trim($post_data['tags_input']), ' ,' ) );
		$new_tags = explode(',', $new_tags);
	}

	if ( isset($post_data['post_parent']) && ($parent = (int) $post_data['post_parent']) ) {
		$pages = $wpdb->get_results("SELECT ID, post_parent FROM $wpdb->posts WHERE post_type = 'page'");
		$children = array();

		for ( $i = 0; $i < 50 && $parent > 0; $i++ ) {
			$children[] = $parent;

			foreach ( $pages as $page ) {
				if ( $page->ID == $parent ) {
					$parent = $page->post_parent;
					break;
				}
			}
		}
	}

	$updated = $skipped = $locked = array();
	foreach ( $post_IDs as $post_ID ) {

		if ( isset($children) && in_array($post_ID, $children) ) {
			$skipped[] = $post_ID;
			continue;
		}

		if ( wp_check_post_lock( $post_ID ) ) {
			$locked[] = $post_ID;
			continue;
		}

		if ( isset($new_cats) ) {
			$cats = (array) wp_get_post_categories($post_ID);
			$post_data['post_category'] = array_unique( array_merge($cats, $new_cats) );
		}

		if ( isset($new_tags) ) {
			$tags = wp_get_post_tags($post_ID, array('fields' => 'names'));
			$post_data['tags_input'] = array_unique( array_merge($tags, $new_tags) );
		}

		$post_data['ID'] = $post_ID;
		$updated[] = wp_update_post( $post_data );

		if ( current_user_can( 'edit_others_posts' ) && isset( $post_data['sticky'] ) ) {
			if ( 'sticky' == $post_data['sticky'] )
				stick_post( $post_ID );
			else
				unstick_post( $post_ID );
		}

	}

	return array( 'updated' => $updated, 'skipped' => $skipped, 'locked' => $locked );
}

/**
 * Default post information to use when populating the "Write Post" form.
 *
 * @since unknown
 *
 * @return unknown
 */
function get_default_post_to_edit() {
	if ( !empty( $_REQUEST['post_title'] ) )
		$post_title = wp_specialchars( stripslashes( $_REQUEST['post_title'] ));
	else if ( !empty( $_REQUEST['popuptitle'] ) ) {
		$post_title = wp_specialchars( stripslashes( $_REQUEST['popuptitle'] ));
		$post_title = funky_javascript_fix( $post_title );
	} else {
		$post_title = '';
	}

	$post_content = '';
	if ( !empty( $_REQUEST['content'] ) )
		$post_content = wp_specialchars( stripslashes( $_REQUEST['content'] ));
	else if ( !empty( $post_title ) ) {
		$text       = wp_specialchars( stripslashes( urldecode( $_REQUEST['text'] ) ) );
		$text       = funky_javascript_fix( $text);
		$popupurl   = clean_url($_REQUEST['popupurl']);
		$post_content = '<a href="'.$popupurl.'">'.$post_title.'</a>'."\n$text";
	}

	if ( !empty( $_REQUEST['excerpt'] ) )
		$post_excerpt = wp_specialchars( stripslashes( $_REQUEST['excerpt'] ));
	else
		$post_excerpt = '';

	$post->ID = 0;
	$post->post_name = '';
	$post->post_author = '';
	$post->post_date = '';
	$post->post_password = '';
	$post->post_status = 'draft';
	$post->post_type = 'post';
	$post->to_ping = '';
	$post->pinged = '';
	$post->comment_status = get_option( 'default_comment_status' );
	$post->ping_status = get_option( 'default_ping_status' );
	$post->post_pingback = get_option( 'default_pingback_flag' );
	$post->post_category = get_option( 'default_category' );
	$post->post_content = apply_filters( 'default_content', $post_content);
	$post->post_title = apply_filters( 'default_title', $post_title );
	$post->post_excerpt = apply_filters( 'default_excerpt', $post_excerpt);
	$post->page_template = 'default';
	$post->post_parent = 0;
	$post->menu_order = 0;

	return $post;
}

/**
 * {@internal Missing Short Description}}
 *
 * @since unknown
 *
 * @return unknown
 */
function get_default_page_to_edit() {
	$page = get_default_post_to_edit();
	$page->post_type = 'page';
	return $page;
}

/**
 * Get an existing post and format it for editing.
 *
 * @since unknown
 *
 * @param unknown_type $id
 * @return unknown
 */
function get_post_to_edit( $id ) {

	$post = get_post( $id, OBJECT, 'edit' );

	if ( $post->post_type == 'page' )
		$post->page_template = get_post_meta( $id, '_wp_page_template', true );

	return $post;
}

/**
 * {@internal Missing Short Description}}
 *
 * @since unknown
 *
 * @param unknown_type $title
 * @param unknown_type $content
 * @param unknown_type $post_date
 * @return unknown
 */
function post_exists($title, $content = '', $post_date = '') {
	global $wpdb;

	$title = stripslashes($title);
	$content = stripslashes($content);
	$post_date = stripslashes($post_date);

	if (!empty ($post_date))
		$post_date = $wpdb->prepare("AND post_date = %s", $post_date);

	if (!empty ($title))
		return $wpdb->get_var( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE post_title = %s $post_date", $title) );
	else
		if (!empty ($content))
			return $wpdb->get_var( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE post_content = %s $post_date", $content) );

	return 0;
}

/**
 * Creates a new post from the "Write Post" form using $_POST information.
 *
 * @since unknown
 *
 * @return unknown
 */
function wp_write_post() {
	global $user_ID;

	if ( 'page' == $_POST['post_type'] ) {
		if ( !current_user_can( 'edit_pages' ) )
			return new WP_Error( 'edit_pages', __( 'You are not allowed to create pages on this blog.' ) );
	} else {
		if ( !current_user_can( 'edit_posts' ) )
			return new WP_Error( 'edit_posts', __( 'You are not allowed to create posts or drafts on this blog.' ) );
	}


	// Check for autosave collisions
	$temp_id = false;
	if ( isset($_POST['temp_ID']) ) {
		$temp_id = (int) $_POST['temp_ID'];
		if ( !$draft_ids = get_user_option( 'autosave_draft_ids' ) )
			$draft_ids = array();
		foreach ( $draft_ids as $temp => $real )
			if ( time() + $temp > 86400 ) // 1 day: $temp is equal to -1 * time( then )
				unset($draft_ids[$temp]);

		if ( isset($draft_ids[$temp_id]) ) { // Edit, don't write
			$_POST['post_ID'] = $draft_ids[$temp_id];
			unset($_POST['temp_ID']);
			update_user_option( $user_ID, 'autosave_draft_ids', $draft_ids );
			return edit_post();
		}
	}

	$translated = _wp_translate_postdata( false );
	if ( is_wp_error($translated) )
		return $translated;

	if ( isset($_POST['visibility']) ) {
		switch ( $_POST['visibility'] ) {
			case 'public' :
				$_POST['post_password'] = '';
				break;
			case 'password' :
				unset( $_POST['sticky'] );
				break;
			case 'private' :
				$_POST['post_status'] = 'private';
				$_POST['post_password'] = '';
				unset( $_POST['sticky'] );
				break;
		}
	}

	// Create the post.
	$post_ID = wp_insert_post( $_POST );
	if ( is_wp_error( $post_ID ) )
		return $post_ID;

	if ( empty($post_ID) )
		return 0;

	add_meta( $post_ID );

	// Reunite any orphaned attachments with their parent
	if ( !$draft_ids = get_user_option( 'autosave_draft_ids' ) )
		$draft_ids = array();
	if ( $draft_temp_id = (int) array_search( $post_ID, $draft_ids ) )
		_relocate_children( $draft_temp_id, $post_ID );
	if ( $temp_id && $temp_id != $draft_temp_id )
		_relocate_children( $temp_id, $post_ID );

	// Update autosave collision detection
	if ( $temp_id ) {
		$draft_ids[$temp_id] = $post_ID;
		update_user_option( $user_ID, 'autosave_draft_ids', $draft_ids );
	}

	// Now that we have an ID we can fix any attachment anchor hrefs
	_fix_attachment_links( $post_ID );

	wp_set_post_lock( $post_ID, $GLOBALS['current_user']->ID );

	return $post_ID;
}

/**
 * Calls wp_write_post() and handles the errors.
 *
 * @since unknown
 *
 * @return unknown
 */
function write_post() {
	$result = wp_write_post();
	if( is_wp_error( $result ) )
		wp_die( $result->get_error_message() );
	else
		return $result;
}

//
// Post Meta
//

/**
 * {@internal Missing Short Description}}
 *
 * @since unknown
 *
 * @param unknown_type $post_ID
 * @return unknown
 */
function add_meta( $post_ID ) {
	global $wpdb;
	$post_ID = (int) $post_ID;

	$protected = array( '_wp_attached_file', '_wp_attachment_metadata', '_wp_old_slug', '_wp_page_template' );

	$metakeyselect = isset($_POST['metakeyselect']) ? stripslashes( trim( $_POST['metakeyselect'] ) ) : '';
	$metakeyinput = isset($_POST['metakeyinput']) ? stripslashes( trim( $_POST['metakeyinput'] ) ) : '';
	$metavalue = isset($_POST['metavalue']) ? maybe_serialize( stripslashes( trim( $_POST['metavalue'] ) ) ) : '';

	if ( ('0' === $metavalue || !empty ( $metavalue ) ) && ((('#NONE#' != $metakeyselect) && !empty ( $metakeyselect) ) || !empty ( $metakeyinput) ) ) {
		// We have a key/value pair. If both the select and the
		// input for the key have data, the input takes precedence:

 		if ('#NONE#' != $metakeyselect)
			$metakey = $metakeyselect;

		if ( $metakeyinput)
			$metakey = $metakeyinput; // default

		if ( in_array($metakey, $protected) )
			return false;

		wp_cache_delete($post_ID, 'post_meta');

		$wpdb->query( $wpdb->prepare("INSERT INTO $wpdb->postmeta (post_id,meta_key,meta_value ) VALUES (%s, %s, %s)", $post_ID, $metakey, $metavalue) );
		return $wpdb->insert_id;
	}
	return false;
} // add_meta

/**
 * {@internal Missing Short Description}}
 *
 * @since unknown
 *
 * @param unknown_type $mid
 * @return unknown
 */
function delete_meta( $mid ) {
	global $wpdb;
	$mid = (int) $mid;

	$post_id = $wpdb->get_var( $wpdb->prepare("SELECT post_id FROM $wpdb->postmeta WHERE meta_id = %d", $mid) );
	wp_cache_delete($post_id, 'post_meta');

	return $wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->postmeta WHERE meta_id = %d", $mid) );
}

/**
 * Get a list of previously defined keys.
 *
 * @since unknown
 *
 * @return unknown
 */
function get_meta_keys() {
	global $wpdb;

	$keys = $wpdb->get_col( "
			SELECT meta_key
			FROM $wpdb->postmeta
			GROUP BY meta_key
			ORDER BY meta_key" );

	return $keys;
}

/**
 * {@internal Missing Short Description}}
 *
 * @since unknown
 *
 * @param unknown_type $mid
 * @return unknown
 */
function get_post_meta_by_id( $mid ) {
	global $wpdb;
	$mid = (int) $mid;

	$meta = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->postmeta WHERE meta_id = %d", $mid) );
	if ( is_serialized_string( $meta->meta_value ) )
		$meta->meta_value = maybe_unserialize( $meta->meta_value );
	return $meta;
}

/**
 * {@internal Missing Short Description}}
 *
 * Some postmeta stuff.
 *
 * @since unknown
 *
 * @param unknown_type $postid
 * @return unknown
 */
function has_meta( $postid ) {
	global $wpdb;

	return $wpdb->get_results( $wpdb->prepare("SELECT meta_key, meta_value, meta_id, post_id
			FROM $wpdb->postmeta WHERE post_id = %d
			ORDER BY meta_key,meta_id", $postid), ARRAY_A );

}

/**
 * {@internal Missing Short Description}}
 *
 * @since unknown
 *
 * @param unknown_type $meta_id
 * @param unknown_type $meta_key
 * @param unknown_type $meta_value
 * @return unknown
 */
function update_meta( $meta_id, $meta_key, $meta_value ) {
	global $wpdb;

	$protected = array( '_wp_attached_file', '_wp_attachment_metadata', '_wp_old_slug', '_wp_page_template' );

	if ( in_array($meta_key, $protected) )
		return false;

	$post_id = $wpdb->get_var( $wpdb->prepare("SELECT post_id FROM $wpdb->postmeta WHERE meta_id = %d", $meta_id) );
	wp_cache_delete($post_id, 'post_meta');

	$meta_value = maybe_serialize( stripslashes( $meta_value ));
	$meta_id = (int) $meta_id;

	$data  = compact( 'meta_key', 'meta_value' );
	$where = compact( 'meta_id' );

	return $wpdb->update( $wpdb->postmeta, $data, $where );
}

//
// Private
//

/**
 * Replace hrefs of attachment anchors with up-to-date permalinks.
 *
 * @since unknown
 * @access private
 *
 * @param unknown_type $post_ID
 * @return unknown
 */
function _fix_attachment_links( $post_ID ) {

	$post = & get_post( $post_ID, ARRAY_A );

	$search = "#<a[^>]+rel=('|\")[^'\"]*attachment[^>]*>#ie";

	// See if we have any rel="attachment" links
	if ( 0 == preg_match_all( $search, $post['post_content'], $anchor_matches, PREG_PATTERN_ORDER ) )
		return;

	$i = 0;
	$search = "#[\s]+rel=(\"|')(.*?)wp-att-(\d+)\\1#i";
	foreach ( $anchor_matches[0] as $anchor ) {
		if ( 0 == preg_match( $search, $anchor, $id_matches ) )
			continue;

		$id = (int) $id_matches[3];

		// While we have the attachment ID, let's adopt any orphans.
		$attachment = & get_post( $id, ARRAY_A );
		if ( ! empty( $attachment) && ! is_object( get_post( $attachment['post_parent'] ) ) ) {
			$attachment['post_parent'] = $post_ID;
			// Escape data pulled from DB.
			$attachment = add_magic_quotes( $attachment);
			wp_update_post( $attachment);
		}

		$post_search[$i] = $anchor;
		$post_replace[$i] = preg_replace( "#href=(\"|')[^'\"]*\\1#e", "stripslashes( 'href=\\1' ).get_attachment_link( $id ).stripslashes( '\\1' )", $anchor );
		++$i;
	}

	$post['post_content'] = str_replace( $post_search, $post_replace, $post['post_content'] );

	// Escape data pulled from DB.
	$post = add_magic_quotes( $post);

	return wp_update_post( $post);
}

/**
 * Move child posts to a new parent.
 *
 * @since unknown
 * @access private
 *
 * @param unknown_type $old_ID
 * @param unknown_type $new_ID
 * @return unknown
 */
function _relocate_children( $old_ID, $new_ID ) {
	global $wpdb;
	$old_ID = (int) $old_ID;
	$new_ID = (int) $new_ID;
	return $wpdb->query( $wpdb->prepare("UPDATE $wpdb->posts SET post_parent = %d WHERE post_parent = %d", $new_ID, $old_ID) );
}

/**
 * {@internal Missing Short Description}}
 *
 * @since unknown
 *
 * @param unknown_type $type
 * @return unknown
 */
function get_available_post_statuses($type = 'post') {
	$stati = wp_count_posts($type);

	return array_keys(get_object_vars($stati));
}

/**
 * {@internal Missing Short Description}}
 *
 * @since unknown
 *
 * @param unknown_type $q
 * @return unknown
 */
function wp_edit_posts_query( $q = false ) {
	if ( false === $q )
		$q = $_GET;
	$q['m']   = isset($q['m']) ? (int) $q['m'] : 0;
	$q['cat'] = isset($q['cat']) ? (int) $q['cat'] : 0;
	$post_stati  = array(	//	array( adj, noun )
				'publish' => array(__('Published'), __('Published posts'), __ngettext_noop('Published <span class="count">(%s)</span>', 'Published <span class="count">(%s)</span>')),
				'future' => array(__('Scheduled'), __('Scheduled posts'), __ngettext_noop('Scheduled <span class="count">(%s)</span>', 'Scheduled <span class="count">(%s)</span>')),
				'pending' => array(__('Pending Review'), __('Pending posts'), __ngettext_noop('Pending Review <span class="count">(%s)</span>', 'Pending Review <span class="count">(%s)</span>')),
				'draft' => array(__('Draft'), _c('Drafts|manage posts header'), __ngettext_noop('Draft <span class="count">(%s)</span>', 'Drafts <span class="count">(%s)</span>')),
				'private' => array(__('Private'), __('Private posts'), __ngettext_noop('Private <span class="count">(%s)</span>', 'Private <span class="count">(%s)</span>')),
			);

	$post_stati = apply_filters('post_stati', $post_stati);

	$avail_post_stati = get_available_post_statuses('post');

	$post_status_q = '';
	if ( isset($q['post_status']) && in_array( $q['post_status'], array_keys($post_stati) ) ) {
		$post_status_q = '&post_status=' . $q['post_status'];
		$post_status_q .= '&perm=readable';
	}

	if ( isset($q['post_status']) && 'pending' === $q['post_status'] ) {
		$order = 'ASC';
		$orderby = 'modified';
	} elseif ( isset($q['post_status']) && 'draft' === $q['post_status'] ) {
		$order = 'DESC';
		$orderby = 'modified';
	} else {
		$order = 'DESC';
		$orderby = 'date';
	}

	wp("post_type=post&what_to_show=posts$post_status_q&posts_per_page=15&order=$order&orderby=$orderby");

	return array($post_stati, $avail_post_stati);
}

/**
 * {@internal Missing Short Description}}
 *
 * @since unknown
 *
 * @param unknown_type $type
 * @return unknown
 */
function get_available_post_mime_types($type = 'attachment') {
	global $wpdb;

	$types = $wpdb->get_col($wpdb->prepare("SELECT DISTINCT post_mime_type FROM $wpdb->posts WHERE post_type = %s", $type));
	return $types;
}

/**
 * {@internal Missing Short Description}}
 *
 * @since unknown
 *
 * @param unknown_type $q
 * @return unknown
 */
function wp_edit_attachments_query( $q = false ) {
	if ( false === $q )
		$q = $_GET;

	$q['m']   = isset( $q['m'] ) ? (int) $q['m'] : 0;
	$q['cat'] = isset( $q['cat'] ) ? (int) $q['cat'] : 0;
	$q['post_type'] = 'attachment';
	$q['post_status'] = 'any';
	$q['posts_per_page'] = 15;
	$post_mime_types = array(	//	array( adj, noun )
				'image' => array(__('Images'), __('Manage Images'), __ngettext_noop('Image <span class="count">(%s)</span>', 'Images <span class="count">(%s)</span>')),
				'audio' => array(__('Audio'), __('Manage Audio'), __ngettext_noop('Audio <span class="count">(%s)</span>', 'Audio <span class="count">(%s)</span>')),
				'video' => array(__('Video'), __('Manage Video'), __ngettext_noop('Video <span class="count">(%s)</span>', 'Video <span class="count">(%s)</span>')),
			);
	$post_mime_types = apply_filters('post_mime_types', $post_mime_types);

	$avail_post_mime_types = get_available_post_mime_types('attachment');

	if ( isset($q['post_mime_type']) && !array_intersect( (array) $q['post_mime_type'], array_keys($post_mime_types) ) )
		unset($q['post_mime_type']);

	wp($q);

	return array($post_mime_types, $avail_post_mime_types);
}

/**
 * {@internal Missing Short Description}}
 *
 * @since unknown
 *
 * @param unknown_type $id
 * @param unknown_type $page
 * @return unknown
 */
function postbox_classes( $id, $page ) {
	if ( isset( $_GET['edit'] ) && $_GET['edit'] == $id )
		return '';
	$current_user = wp_get_current_user();
	if ( $closed = get_user_option('closedpostboxes_'.$page, 0, false ) ) {
		if ( !is_array( $closed ) ) return '';
		return in_array( $id, $closed )? 'if-js-closed' : '';
	} else {
		return '';
	}
}

/**
 * {@internal Missing Short Description}}
 *
 * @since unknown
 *
 * @param unknown_type $id
 * @param unknown_type $title
 * @param unknown_type $name
 * @return unknown
 */
function get_sample_permalink($id, $title=null, $name = null) {
	$post = &get_post($id);
	if (!$post->ID) {
		return array('', '');
	}
	$original_status = $post->post_status;
	$original_date = $post->post_date;
	$original_name = $post->post_name;

	// Hack: get_permalink would return ugly permalink for
	// drafts, so we will fake, that our post is published
	if (in_array($post->post_status, array('draft', 'pending'))) {
		$post->post_status = 'publish';
		$post->post_name = sanitize_title($post->post_name? $post->post_name : $post->post_title, $post->ID);
	}

	// If the user wants to set a new name -- override the current one
	// Note: if empty name is supplied -- use the title instead, see #6072
	if (!is_null($name)) {
		$post->post_name = sanitize_title($name? $name : $title, $post->ID);
	}

	$permalink = get_permalink($post, true);

	// Handle page hierarchy
	if ( 'page' == $post->post_type ) {
		$uri = get_page_uri($post->ID);
		$uri = untrailingslashit($uri);
		$uri = strrev( stristr( strrev( $uri ), '/' ) );
		$uri = untrailingslashit($uri);
		if ( !empty($uri) )
			$uri .='/';
		$permalink = str_replace('%pagename%', "${uri}%pagename%", $permalink);
	}

	$permalink = array($permalink, apply_filters('editable_slug', $post->post_name));
	$post->post_status = $original_status;
	$post->post_date = $original_date;
	$post->post_name = $original_name;
	return $permalink;
}

/**
 * {@internal Missing Short Description}}
 *
 * @since unknown
 *
 * @param unknown_type $id
 * @param unknown_type $new_title
 * @param unknown_type $new_slug
 * @return unknown
 */
function get_sample_permalink_html($id, $new_title=null, $new_slug=null) {
	$post = &get_post($id);
	list($permalink, $post_name) = get_sample_permalink($post->ID, $new_title, $new_slug);
	if (false === strpos($permalink, '%postname%') && false === strpos($permalink, '%pagename%')) {
		return '';
	}
	$title = __('Click to edit this part of the permalink');
	if (function_exists('mb_strlen')) {
		if (mb_strlen($post_name) > 30) {
			$post_name_abridged = mb_substr($post_name, 0, 14). '&hellip;' . mb_substr($post_name, -14);
		} else {
			$post_name_abridged = $post_name;
		}
	} else {
		if (strlen($post_name) > 30) {
			$post_name_abridged = substr($post_name, 0, 14). '&hellip;' . substr($post_name, -14);
		} else {
			$post_name_abridged = $post_name;
		}
	}
	$post_name_html = '<span id="editable-post-name" title="'.$title.'">'.$post_name_abridged.'</span><span id="editable-post-name-full">'.$post_name.'</span>';
	$display_link = str_replace(array('%pagename%','%postname%'), $post_name_html, $permalink);
	$return = '<strong>' . __('Permalink:') . "</strong>\n" . '<span id="sample-permalink">' . $display_link . "</span>\n";
	$return .= '<span id="edit-slug-buttons"><a href="#post_name" class="edit-slug button" onclick="edit_permalink(' . $id . '); return false;">' . __('Edit') . "</a></span>\n";
	return $return;
}

/**
 * {@internal Missing Short Description}}
 *
 * @since unknown
 *
 * @param unknown_type $post_id
 * @return bool|int False: not locked or locked by current user. Int: user ID of user with lock.
 */
function wp_check_post_lock( $post_id ) {
	global $current_user;

	if ( !$post = get_post( $post_id ) )
		return false;

	$lock = get_post_meta( $post->ID, '_edit_lock', true );
	$last = get_post_meta( $post->ID, '_edit_last', true );

	$time_window = apply_filters( 'wp_check_post_lock_window', AUTOSAVE_INTERVAL * 2 );

	if ( $lock && $lock > time() - $time_window && $last != $current_user->ID )
		return $last;
	return false;
}

/**
 * {@internal Missing Short Description}}
 *
 * @since unknown
 *
 * @param unknown_type $post_id
 * @return unknown
 */
function wp_set_post_lock( $post_id ) {
	global $current_user;
	if ( !$post = get_post( $post_id ) )
		return false;
	if ( !$current_user || !$current_user->ID )
		return false;

	$now = time();

	if ( !add_post_meta( $post->ID, '_edit_lock', $now, true ) )
		update_post_meta( $post->ID, '_edit_lock', $now );
	if ( !add_post_meta( $post->ID, '_edit_last', $current_user->ID, true ) )
		update_post_meta( $post->ID, '_edit_last', $current_user->ID );
}

/**
 * Creates autosave data for the specified post from $_POST data.
 *
 * @package WordPress
 * @subpackage Post_Revisions
 * @since 2.6.0
 *
 * @uses _wp_translate_postdata()
 * @uses _wp_post_revision_fields()
 */
function wp_create_post_autosave( $post_id ) {
	$translated = _wp_translate_postdata( true );
	if ( is_wp_error( $translated ) )
		return $translated;

	// Only store one autosave.  If there is already an autosave, overwrite it.
	if ( $old_autosave = wp_get_post_autosave( $post_id ) ) {
		$new_autosave = _wp_post_revision_fields( $_POST, true );
		$new_autosave['ID'] = $old_autosave->ID;
		return wp_update_post( $new_autosave );
	}

	// Otherwise create the new autosave as a special post revision
	return _wp_put_post_revision( $_POST, true );
}

/**
 * Save draft or manually autosave for showing preview.
 *
 * @package WordPress
 * @since 2.7
 *
 * @uses wp_write_post()
 * @uses edit_post()
 * @uses get_post()
 * @uses current_user_can()
 * @uses wp_create_post_autosave()
 *
 * @return str URL to redirect to show the preview
 */
function post_preview() {

	$post_ID = (int) $_POST['post_ID'];
	if ( $post_ID < 1 )
		wp_die( __('Preview not available. Please save as a draft first.') );

	if ( isset($_POST['catslist']) )
		$_POST['post_category'] = explode(",", $_POST['catslist']);

	if ( isset($_POST['tags_input']) )
		$_POST['tags_input'] = explode(",", $_POST['tags_input']);

	if ( $_POST['post_type'] == 'page' || empty($_POST['post_category']) )
		unset($_POST['post_category']);

	$_POST['ID'] = $post_ID;
	$post = get_post($post_ID);

	if ( 'page' == $post->post_type ) {
		if ( !current_user_can('edit_page', $post_ID) )
			wp_die(__('You are not allowed to edit this page.'));
	} else {
		if ( !current_user_can('edit_post', $post_ID) )
			wp_die(__('You are not allowed to edit this post.'));
	}

	if ( 'draft' == $post->post_status ) {
		$id = edit_post();
	} else { // Non drafts are not overwritten.  The autosave is stored in a special post revision.
		$id = wp_create_post_autosave( $post->ID );
		if ( ! is_wp_error($id) )
			$id = $post->ID;
	}

	if ( is_wp_error($id) )
		wp_die( $id->get_error_message() );

	if ( $_POST['post_status'] == 'draft'  ) {
		$url = add_query_arg( 'preview', 'true', get_permalink($id) );
	} else {
		$nonce = wp_create_nonce('post_preview_' . $id);
		$url = add_query_arg( array( 'preview' => 'true', 'preview_id' => $id, 'preview_nonce' => $nonce ), get_permalink($id) );
	}

	return $url;
}