<?php
/* GITCore.class.php - phpgitweb
 * Copyright (C) 2011-2012  Philipp Kreil (pk910)
 * 
 * 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 3 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, see <http://www.gnu.org/licenses/>. 
 */

define("PHPGITWEB_VERSION", "0.0.1");
require_once("lib/ContentProvider.class.php");
require_once("lib/ProjectLoader.class.php");
require_once("lib/CommitLoader.class.php");
require_once("lib/GitCommand.class.php");
require_once("lib/Tools.class.php");
require_once("lib/Validation.class.php");
require_once("lib/graph.class.php");

class PHPGitWeb {
    private $page, $rendertime;
	private $project, $project_loader, $project_header;
	
    public function __construct() {
		$this->rendertime = microtime(true);
		$this->page = new ContentProvider('main', 'main');
		set_error_handler(array($this, "error_handler"));
		$this->append_header_nav('projects', '?a=projects', false);
		$this->page->set('git_version', GitCommand::core_version());
		
		$this->project_loader = new ProjectLoader();
		$this->page->append('title', GitConfig::GITWEB_TITLE);
	}
	
	public function get_project_loader() {
		return $this->project_loader;
	}
	
	public function load_project($project) {
		$this->project = $this->project_loader->getProject($project);
		
		if(!$this->project)
			$this->page->append('content', new ContentProvider('main', 'err404_project'));
		else {
			ContentProvider::overall_set('project', $this->project['name']);
			ContentProvider::overall_set('project_head', "HEAD");
			$this->append_header_nav($this->project['name'], '?p='.$this->project['name'].'&a=summary', true);
			$this->append_title(" - ".$this->project['name'], false);
			$this->project_header = new ContentProvider('main', 'project_header');
			$this->project_header->set('sub_nav', "");
			$this->page->append('content', $this->project_header);
		}
	}
	
	public function get_project_header() {
		return $this->project_header;
	}
	
	public function load_content($page) {
		$class_name = 'page_'.basename($page);
		$class_file = 'pages/'.basename($page).'.class.php';
		$static_file = 'pages/'.basename($page).'.html';
		if(file_exists($class_file)) {
			require_once($class_file);
			$pageobj = new $class_name;
			$this->page->append('content', $pageobj->main($this, $this->project));
		} else if(file_exists($static_file)) {
			$this->page->append('content', file_get_contents($static_file));
		} else
			$this->page->append('content', file_get_contents('pages/404.html'));
		if($this->project_header) {
			$this->project_header->set('nav_summary',    new ContentProvider('main', ($page == 'summary'    ? 'project_header_nav_active' : 'project_header_nav_link'), array('name' => "summary",    'link' => "summary")));
			$this->project_header->set('nav_shortlog',   new ContentProvider('main', ($page == 'shortlog'   ? 'project_header_nav_active' : 'project_header_nav_link'), array('name' => "shortlog",   'link' => "shortlog")));
			$this->project_header->set('nav_log',        new ContentProvider('main', ($page == 'log'        ? 'project_header_nav_active' : 'project_header_nav_link'), array('name' => "log",        'link' => "log")));
			$this->project_header->set('nav_commit',     new ContentProvider('main', ($page == 'commit'     ? 'project_header_nav_active' : 'project_header_nav_link'), array('name' => "commit",     'link' => "commit")));
			$this->project_header->set('nav_commitdiff', new ContentProvider('main', ($page == 'commitdiff' ? 'project_header_nav_active' : 'project_header_nav_link'), array('name' => "commitdiff", 'link' => "commitdiff")));
			$this->project_header->set('nav_tree',       new ContentProvider('main', ($page == 'tree'       ? 'project_header_nav_active' : 'project_header_nav_link'), array('name' => "tree",       'link' => "tree")));
		}
	}
	
	public function append_header_nav($name, $link, $prepend_slash = true) {
		if($prepend_slash)
			$this->page->append('header_nav', ' / ');
		if($link) 
			$this->page->append('header_nav', '<a href="'.$link.'">'.$name.'</a>');
		else
			$this->page->append('header_nav', $name);
	}
	
	public function append_title($name, $prepend_slash = true) {
		if($prepend_slash)
			$this->page->append('title', '/');
		$this->page->append('title', $name);
	}
	
	public function append_sub_nav($html) {
		if($this->project_header)
			$this->project_header->append('sub_nav', $html);
	}
	
	public function load_extension($extension) {
		switch($extension) {
		case "graph":
			$graph = new graph_image_generator();
			$graph->generate($_GET['gd']);
			break;
		}
	}
	
	public function get_content() {
		$html = $this->page->output();
		$rendertime = round(microtime(true) - $this->rendertime,3);
		$html = str_replace(array("%rendertime%"), array($rendertime), $html);
		return $html;
	}
    
	public function error_handler($errno, $errstr, $errfile, $errline) {
		$error = new ContentProvider('main', 'error');
		$etype = "";
		switch($errno) {
		case E_ERROR: $etype = "E_ERROR"; break;
		case E_WARNING: $etype = "E_WARNING"; break;
		case E_PARSE: $etype = "E_PARSE"; break;
		case E_NOTICE: $etype = "E_NOTICE"; break;
		case E_CORE_ERROR: $etype = "E_CORE_ERROR"; break;
		case E_CORE_WARNING: $etype = "E_CORE_WARNING"; break;
		case E_COMPILE_ERROR: $etype = "E_COMPILE_ERROR"; break;
		case E_COMPILE_WARNING: $etype = "E_COMPILE_WARNING"; break;
		case E_USER_ERROR: $etype = "E_USER_ERROR"; break;
		case E_USER_WARNING: $etype = "E_USER_WARNING"; break;
		case E_USER_NOTICE: $etype = "E_USER_NOTICE"; break;
		case E_STRICT: $etype = "E_STRICT"; break;
		case E_RECOVERABLE_ERROR: $etype = "E_RECOVERABLE_ERROR"; break;
		case E_DEPRECATED: $etype = "E_DEPRECATED"; break;
		case E_USER_DEPRECATED: $etype = "E_USER_DEPRECATED"; break;
		}
		$error->set('errno', $errno);
		$error->set('errtype', $etype);
		$error->set('errstr', $errstr);
		$error->set('errfile', $errfile);
		$error->set('errline', $errline);
		$this->page->append('content', $error);
	}
}

?>