<?php
/*=====================================================================*\
|| ###################################################################
|| # ViewSVN [#]version[#]
|| # Copyright Š2002-[#]year[#] Iris Studios, Inc.
|| #
|| # This program is free software; you can redistribute it and/or modify
|| # it under the terms of the GNU General Public License as published by
|| # the Free Software Foundation; version [#]gpl[#] of the License.
|| #
|| # This program is distributed in the hope that it will be useful, but
|| # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|| # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|| # more details.
|| #
|| # You should have received a copy of the GNU General Public License along
|| # with this program; if not, write to the Free Software Foundation, Inc.,
|| # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
|| ###################################################################
\*=====================================================================*/

/**
* File container for cacheV class
*
* @package	ViewSVN
*/

/**
* cacheV
*
* This class is responsible for interacting with a given cacheV table.
* It controls rebuilding from scratch, updates, and querying the cache.
*
* @author		Iris Studios, Inc.
* @copyright	Copyright Š2002 - [#]year[#], Iris Studios, Inc.
* @version		$Revision$
* @package		ViewSVN
* 
*/
class cacheV
{
	/**
	* The registry
	* @var	object
	*/
	var $registry = null;
	
	/**
	* cacheV hash
	* @var	string
	*/
	var $hash;
	
	/**
	* Record count - the number of records in cacheV
	* @var	integer
	*/
	var $count;
	
	/**
	* Memcache for all fetched revisions so we don't have to query-dupe
	* @var	array
	*/
	var $memcache = array();
	
	// ###################################################################
	/**
	* Constructor: initialies the registry
	*/
	function cacheV()
	{
		global $viewsvn;
		$this->registry =& $viewsvn;
	}
	
	// ###################################################################
	/**
	* Sets the hash so we know what table we're dealing with
	*
	* @access	public
	*/
	function set_hash()
	{
		$this->hash = md5($this->registry->repos->fetch_path($this->registry->paths->repos));
	}
	
	// ###################################################################
	/**
	* Returns a specific log entry
	*
	* @access	public
	*
	* @param	integer	Revision number
	*
	* @return	array	Complete revision/commit entry
	*/
	function fetch_revision($revision)
	{
		$revision = $this->registry->clean($revision, TYPE_UINT);
		
		if (!isset($this->memcache["$revision"]))
		{
			$this->memcache["$revision"] = $this->registry->db->query_first("SELECT * FROM {$this->hash} WHERE revision = $revision");
		}
		
		return $this->memcache["$revision"];
	}
	
	// ###################################################################
	/**
	* Checks to see if it's necessary to rebuild the cacheV table for the
	* current repository. This is done by making sure $count > 0. If not,
	* then rebuild() is run. This also checks against the cacheV table
	* to make sure that it's up-to-date against the root repository.
	*
	* @access	public
	*/
	function exec_build()
	{
		$result = $this->registry->db->query_first("SELECT MAX(revision) AS max FROM {$this->hash}");
		$this->count = $result['max'];
		
		// time to go from the start
		if ($this->count == 0)
		{
			$this->build(null);
		}
		else
		{
			// send an Xquery to SVN
			$query = $this->registry->svn->svn('info --xml ' . $this->registry->repos->fetch_path($this->registry->paths->repos));
			$query = implode("\n", $query);
			
			$tree = $this->registry->xml->parse($query);
			
			if ($tree['info']['entry']['revision'] != $this->count)
			{
				$this->build($this->count);
			}
		}
	}
	
	// ###################################################################
	/**
	* Builds the cacheV table. This can be used to build only part of the
	* cache or the entire thing, if the revision is set to NULL.
	*
	* @access	public
	*
	* @param	integer	Lower (current) revision
	*/
	function build($revision)
	{
		$start = microtime();
		
		$output = $this->registry->svn->svn('log --xml -v ' . ($revision !== null ? '-r' . $revision . ':HEAD ' : '') . $this->registry->repos->fetch_path($this->registry->paths->repos));
		$output = implode("\n", $output);
		
		$tree = $this->registry->xml->parse($output);
		
		foreach ($tree['log']['logentry'] AS $log)
		{
			if (isset($log['paths'][0]))
			{
				$files = $log['paths']['path'];
			}
			else
			{
				$files = array($log['paths']['path']);
			}
			
			$inserts[] = "($log[revision], '{$log['author']['value']}', '{$log['date']['value']}', '" . $this->registry->escape($log['msg']['value']) . "', '" . $this->registry->escape(serialize($files)) . "')";
		}
		
		$this->registry->db->query("
			INSERT INTO {$this->hash}
				(revision, author, dateline, message, files)
			VALUES
				" . implode(",\n", $inserts)
		);
		
		$this->registry->debug("TIME TO (RE)BUILD: " . $this->registry->funct->fetch_microtime_diff($start));
	}
}

/*=====================================================================*\
|| ###################################################################
|| # $HeadURL$
|| # $Id$
|| ###################################################################
\*=====================================================================*/
?>