<?php /* -*- Mode: php; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

include_once($UTIL_DIR . "/convert.php");
include_once($UTIL_DIR . "/threads.php");


class Forum {
	public $fid;
	public $name;
	private $newStuff;
  private $numPosts;
  private $latestPost;

	public function setNewStuff($newStuff, $threads)
	{
    $this->numPosts = sizeof($threads->threads);
    $this->latestPost = "";
    $t = $threads->getLatestThread();
    if($t) {
      $this->latestPost = $t->name;
    }
    
		$this->newStuff = $newStuff;
	}

	public function show()
	{
    $newcls = " forum_nonew";
    if($this->newStuff) $newcls = " forum_new";

		echo "    <div class=\"forum\">\n";
		echo "      <span class=\"forum_icon".$newcls."\"></span>\n";
		echo "      <a class=\"forum_title\" href=\"?fid=" . $this->fid . "\">" . $this->name . "</a>\n";
    echo "      <span class=\"forum_latestpost\">".$this->latestPost."</span>\n";
    echo "      <span class=\"forum_numberofthreads\">".sprintf("%d", $this->numPosts)." threads</span>\n";
		echo "    </div>\n";
	}

	public function Forum($fid, $name)
	{
		$this->fid = $fid;
		$this->name = $name;
	}
}

class Forums {

	private $file;
	public $forums = array();
	
	public function add($forum) {
		global $FORUMS_DIR;
		if(!file_exists($FORUMS_DIR . "/". $forum->fid)) {
			mkdir($FORUMS_DIR . "/". $forum->fid);
		}
		$key = $forum->fid;
		$this->forums[$key] = $forum;
	}
	
	public function write()
	{
		$fp = fopen($this->file, "w");

		$block = TRUE;
		flock($fp, LOCK_EX, $block); // do an exclusive lock

		fwrite($fp, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");

		fwrite($fp, "<forums>\n");
		foreach($this->forums as $forum) {
			fwrite($fp, "  <forum fid=\"" . $forum->fid . "\"\n");
			fwrite($fp, "         name=\"" . htmlspecialchars($forum->name, ENT_QUOTES, "UTF-8") . "\"/>\n");
		}
		fwrite($fp, "</forums>\n");

		fclose($fp);
	}

	public function getForum($fid)
	{
		$forum = $this->forums[$fid]; 
		return $forum;
	}

	public function show()
	{
    echo "<div class=\"forums\">\n";
		foreach($this->forums as $forum) {
			$forum->show();
		}
    echo "</div>\n";
	}

	private function read()
	{
		global $FORUMS_DIR;

		$dom = new DomDocument;
		$dom->preserveWhiteSpace = FALSE;
		$dom->load($this->file);
		$forums = $dom->getElementsByTagName('forum');

		foreach($forums as $f) {
			$forum = new Forum($f->getAttribute('fid'),
												 $f->getAttribute('name'));

			$this->add($forum);

			$threads = new Threads($FORUMS_DIR . "/" . $f->getAttribute('fid'));
			$forum->setNewStuff($threads->newStuff(), $threads);
		}
	}

	public function Forums($file)
	{
		$this->file = $file;
		if(file_exists($file)) $this->read();
		else {
			if(!file_exists(dirname($file))) {
				if(!mkdir(dirname($file))) {
					echo"Could not create directory: " . dirname($file);
					die();
				}
			} else {
				if(!is_dir(dirname($file))) {
					echo dirname($file) . " exists but is not a directory";
					die();
				} else {
					if(!is_readable(dirname($file)) || !is_writeable(dirname($file)) || !is_executable(dirname($file))) {
						echo dirname($file) . " exists but does not have the correct permissions. (r/w/x)";
						die();
					}
				}
			}
		}
	}

}
?>