<?php
// WebSVN - Subversion repository viewing via the web using PHP
// Copyright (C) 2004-2006 Tim Armes
//
// 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; either version 2 of the License, or
// (at your option) any later version.
//
// 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// --
//
// blame.php
//
// Show the blame information of a file.
//

require_once 'include/setup.php';
require_once 'include/svnlook.php';
require_once 'include/utils.php';
require_once 'include/template.php';

$vars['action'] = $lang['BLAME'];

// Make sure that we have a repository
if (!$rep)
{
	renderTemplate404('blame','NOREP');
}

$svnrep = new SVNRepository($rep);

// If there's no revision info, go to the lastest revision for this path
$history = $svnrep->getLog($path, 'HEAD', 1, false, 2, ($path == '/') ? '' : $peg);

if (!$history) 
{
	unset($vars['error']);
	$history = $svnrep->getLog($path, '', '', false, 2, ($path == '/') ? '' : $peg);

	if (!$history)
	{
		renderTemplate404('blame','NOPATH');
	}
}
$youngest = ($history && isset($history->entries[0])) ? $history->entries[0]->rev : false;

if (empty($rev)) 
{
	$rev = $youngest;
} 
else 
{
	$history = $svnrep->getLog($path, $rev, '', false, 2, $peg);
	if (!$history) 
	{
		renderTemplate404('blame','NOPATH');
	}
}

if ($path[0] != '/') 
{
	$ppath = '/'.$path;
} 
else 
{
	$ppath = $path;
}

// Find the parent path (or the whole path if it's already a directory)
$pos = strrpos($ppath, '/');
$parent = substr($ppath, 0, $pos + 1);

$vars['rev'] = $rev;
$vars['peg'] = $peg;
$vars['path'] = escape($ppath);

if (isset($history->entries[0])) 
{
	$vars['log'] = xml_entities($history->entries[0]->msg);
	$vars['date'] = $history->entries[0]->date;
	$vars['age'] = datetimeFormatDuration(time() - strtotime($history->entries[0]->date));
	$vars['author'] = $history->entries[0]->author;
}

createPathLinks($rep, $ppath, $passrev, $peg);
$passRevString = createRevAndPegString($rev, $peg);

if ($rev != $youngest) 
{
	$vars['goyoungesturl'] = $config->getURL($rep, $path, 'blame').createRevAndPegString('', $peg);
	$vars['goyoungestlink'] = '<a href="'.$vars['goyoungesturl'].'"'.($youngest ? ' title="'.$lang['REV'].' '.$youngest.'"' : '').'>'.$lang['GOYOUNGEST'].'</a>';
}

$revurl = $config->getURL($rep, $path, 'blame');

if ($rev < $youngest) 
{
	$history2 = $svnrep->getLog($path, $rev, $youngest, true, 2, $peg);

	if (isset($history2->entries[1])) 
	{
		$nextRev = $history2->entries[1]->rev;
		if ($nextRev != $youngest) 
		{
			$vars['nextrev'] = $nextRev;
			$vars['nextrevurl'] = $revurl.createRevAndPegString($nextRev, $peg);
		}
	}

	unset($vars['error']);
}

if (isset($history->entries[1])) 
{
	$prevRev = $history->entries[1]->rev;
	$prevPath = $history->entries[1]->path;
	$vars['prevrev'] = $prevRev;
	$vars['prevrevurl'] = $revurl.createRevAndPegString($prevRev, $peg);
}

$vars['revurl'] = $config->getURL($rep, $path, 'revision').$passRevString;
$vars['revlink'] = '<a href="'.$vars['revurl'].'">'.$lang['LASTMOD'].'</a>';

$vars['logurl'] = $config->getURL($rep, $path, 'log').$passRevString;
$vars['loglink'] = '<a href="'.$vars['logurl'].'">'.$lang['VIEWLOG'].'</a>';

$vars['filedetailurl'] = $config->getURL($rep, $path, 'file').$passRevString;
$vars['filedetaillink'] = '<a href="'.$vars['filedetailurl'].'">'.$lang['FILEDETAIL'].'</a>';

if ($history == null || count($history->entries) > 1) 
{
	$vars['diffurl'] = $config->getURL($rep, $path, 'diff').$passRevString;
	$vars['difflink'] = '<a href="'.$vars['diffurl'].'">'.$lang['DIFFPREV'].'</a>';
}

if ($rep->isRssEnabled()) 
{
	$vars['rssurl'] = $config->getURL($rep, $path, 'rss').createRevAndPegString('', $peg);
	$vars['rsslink'] = '<a href="'.$vars['rssurl'].'">'.$lang['RSSFEED'].'</a>';
}

// Check for binary file type before grabbing blame information.
$svnMimeType = $svnrep->getProperty($path, 'svn:mime-type', $rev, $peg);

if (!$rep->getIgnoreSvnMimeTypes() && preg_match('~application/*~', $svnMimeType)) 
{
	$vars['warning'] = 'Cannot display blame info for binary file. (svn:mime-type = '.$svnMimeType.')';
	$vars['javascript'] = '';
}
else 
{
	// Get the contents of the file
	$tfname = tempnamWithCheck($config->getTempDir(), '');
	$highlighted = $svnrep->getFileContents($path, $tfname, $rev, $peg, '', 'line');

	if ($file = fopen($tfname, 'r')) 
	{
		// Get the blame info
		$tbname = tempnamWithCheck($config->getTempDir(), '');

		$svnrep->getBlameDetails($path, $tbname, $rev, $peg);

		if ($blame = fopen($tbname, 'r')) 
		{
			// Create an array of version/author/line

			$index = 0;
			$seen_rev = array();
			$last_rev = '';
			$row_class = '';

			while (!feof($blame) && !feof($file)) 
			{
				$blameline = fgets($blame);

				if ($blameline != '') 
				{
					list($revision, $author, $remainder) = sscanf($blameline, '%d %s %s');
					$empty = !$remainder;

					$listvar = &$listing[$index];
					$listvar['lineno'] = $index + 1;

					if ($last_rev != $revision) 
					{
						$listvar['revision'] = '<a id="l'.$index.'-rev" class="blame-revision" href="'.$config->getURL($rep, $path, 'blame').createRevAndPegString($revision, $peg ? $peg : $rev).'">'.$revision.'</a>';
						$seen_rev[$revision] = 1;
						$row_class = ($row_class == 'light') ? 'dark' : 'light';
						$listvar['author'] = $author;
					} 
					else 
					{
						$listvar['revision'] = '';
						$listvar['author'] = '';
					}

					$listvar['row_class'] = $row_class;
					$last_rev = $revision;

					$line = rtrim(fgets($file));
					if (!$highlighted)
					{
						$line = escape(toOutputEncoding($line));
					}
					$listvar['line'] = ($empty) ? '&nbsp;' : wrapInCodeTagIfNecessary($line);
					$index++;
				}
			}
			fclose($blame);
		}

		fclose($file);
		@unlink($tbname);
	}
	@unlink($tfname);

	// Build the necessary JavaScript as an array of lines, then join them with \n
	$javascript = array();
	$javascript[] = '<script type="text/javascript" src="'.$locwebsvnhttp.'/javascript/blame-popup.js"></script>';
	$javascript[] = '<script type="text/javascript">';
	$javascript[] = '/* <![CDATA[ */';
	$javascript[] = 'var rev = new Array();';

	ksort($seen_rev); // Sort revisions in descending order by key
	if (empty($peg))
	{
		$peg = $rev;
	}
	if (!isset($vars['warning'])) 
	{
		foreach ($seen_rev as $key => $val) 
		{
			$history = $svnrep->getLog($path, $key, $key, false, 1, $peg);

			if ($history) 
			{
				$javascript[] = 'rev['.$key.'] = \'<div class="date">'.$history->curEntry->date.'</div><div class="msg">'.addslashes(preg_replace('/\n/', ' ', $history->curEntry->msg)).'</div>\';';
			}
		}
	}

	$javascript[] = '/* ]]> */';
	$javascript[] = '</script>';
	$vars['javascript'] = implode("\n", $javascript);
}

if (!$rep->hasReadAccess($path, false)) 
{
	$vars['error'] = $lang['NOACCESS'];
	sendHeaderForbidden();
}

renderTemplate('blame');
