WordPress/wp-admin/includes/post.php

<?php

// Update an existing post with values provided in $_POST.
function edit_post() {
	global $user_ID;

	$post_ID = (int) $_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.' ));
	}

	// Autosave shouldn't save too soon after a real save
	if ( 'autosave' == $_POST['action'] ) {
		$post =& get_post( $post_ID );
		$now = time();
		$then = strtotime($post->post_date_gmt . ' +0000');
		// Keep autosave_interval in sync with autosave-js.php.
		$delta = apply_filters( 'autosave_interval', 120 ) / 2;
		if ( ($now - $then) < $delta )
			return $post_ID;
	}

	// Rename.
	$_POST['ID'] = (int) $_POST['post_ID'];
	$_POST['post_content'] = $_POST['content'];
	$_POST['post_excerpt'] = $_POST['excerpt'];
	$_POST['post_parent'] = $_POST['parent_id'];
	$_POST['to_ping'] = $_POST['trackback_url'];

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

	if ( $_POST['post_author'] != $_POST['user_ID'] ) {
		if ( 'page' == $_POST['post_type'] ) {
			if ( !current_user_can( 'edit_others_pages' ) )
				wp_die( __('You are not allowed to edit pages as this user.' ));
		} else {
			if ( !current_user_can( 'edit_others_posts' ) )
				wp_die( __('You are not allowed to edit posts as this user.' ));

		}
	}

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

	if ( 'page' == $_POST['post_type'] ) {
		if ('publish' == $_POST['post_status'] && !current_user_can( 'edit_published_pages' ))
			$_POST['post_status'] = 'pending';
	} else {
		if ('publish' == $_POST['post_status'] && !current_user_can( 'edit_published_posts' ))
			$_POST['post_status'] = 'pending';
	}

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

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

	if (!empty ( $_POST['edit_date'] ) ) {
		$aa = $_POST['aa'];
		$mm = $_POST['mm'];
		$jj = $_POST['jj'];
		$hh = $_POST['hh'];
		$mn = $_POST['mn'];
		$ss = $_POST['ss'];
		$jj = ($jj > 31 ) ? 31 : $jj;
		$hh = ($hh > 23 ) ? $hh -24 : $hh;
		$mn = ($mn > 59 ) ? $mn -60 : $mn;
		$ss = ($ss > 59 ) ? $ss -60 : $ss;
		$_POST['post_date'] = "$aa-$mm-$jj $hh:$mn:$ss";
		$_POST['post_date_gmt'] = get_gmt_from_date( "$aa-$mm-$jj $hh:$mn:$ss" );
	}

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

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

	add_meta( $post_ID );

	wp_update_post( $_POST );

	// 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 );

	return $post_ID;
}

// Default post information to use when populating the "Write Post" form.
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 = '';
	}

	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->post_status = 'draft';
	$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;
}

// Get an existing post and format it for editing.
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;
}

function post_exists($title, $content = '', $post_date = '') {
	global $wpdb;

	if (!empty ($post_date))
		$post_date = "AND post_date = '$post_date'";

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

	return 0;
}

// Creates a new post from the "Write Post" form using $_POST information.
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();
		}
	}

	// Rename.
	$_POST['post_content'] = $_POST['content'];
	$_POST['post_excerpt'] = $_POST['excerpt'];
	$_POST['post_parent'] = $_POST['parent_id'];
	$_POST['to_ping'] = $_POST['trackback_url'];

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

	}

	if ( $_POST['post_author'] != $_POST['user_ID'] ) {
		if ( 'page' == $_POST['post_type'] ) {
			if ( !current_user_can( 'edit_others_pages' ) )
				return new WP_Error( 'edit_others_pages', __( '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', __( 'You are not allowed to post as this user.' ) );

		}
	}

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

	if ( 'page' == $_POST['post_type'] ) {
		if ('publish' == $_POST['post_status'] && !current_user_can( 'publish_pages' ) )
			$_POST['post_status'] = 'pending';
	} else {
		if ('publish' == $_POST['post_status'] && !current_user_can( 'publish_posts' ) )
			$_POST['post_status'] = 'pending';
	}

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

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

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

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

	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 );

	return $post_ID;
}

function write_post() {
	$result = wp_write_post();
	if( is_wp_error( $result ) )
		wp_die( $result->get_error_message() );
	else
		return $result;
}

//
// Post Meta
//

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 = $wpdb->escape( stripslashes( trim( $_POST['metakeyselect'] ) ) );
	$metakeyinput = $wpdb->escape( stripslashes( trim( $_POST['metakeyinput'] ) ) );
	$metavalue = maybe_serialize( stripslashes( (trim( $_POST['metavalue'] ) ) ));
	$metavalue = $wpdb->escape( $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;

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

function delete_meta( $mid ) {
	global $wpdb;
	$mid = (int) $mid;

	return $wpdb->query( "DELETE FROM $wpdb->postmeta WHERE meta_id = '$mid'" );
}

// Get a list of previously defined keys
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;
}

function get_post_meta_by_id( $mid ) {
	global $wpdb;
	$mid = (int) $mid;

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

// Some postmeta stuff
function has_meta( $postid ) {
	global $wpdb;

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

}

function update_meta( $mid, $mkey, $mvalue ) {
	global $wpdb;

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

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

	$mvalue = maybe_serialize( stripslashes( $mvalue ));
	$mvalue = $wpdb->escape( $mvalue );
	$mid = (int) $mid;
	return $wpdb->query( "UPDATE $wpdb->postmeta SET meta_key = '$mkey', meta_value = '$mvalue' WHERE meta_id = '$mid'" );
}

//
// Private
//

// Replace hrefs of attachment anchors with up-to-date permalinks.
function _fix_attachment_links( $post_ID ) {
	global $wp_rewrite;

	$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
function _relocate_children( $old_ID, $new_ID ) {
	global $wpdb;
	$old_ID = (int) $old_ID;
	$new_ID = (int) $new_ID;
	return $wpdb->query( "UPDATE $wpdb->posts SET post_parent = $new_ID WHERE post_parent = $old_ID" );
}

?>