<?php

class File {

	var $file, $id;

	function File($file) {
		$this->file = $file;
	}

	function open($mode) {
		$this->id = @fopen($this->file, $mode);
		if (!$this->id) {
			trigger_error('Could not open '.$this->file.' in mode '.$mode.'.');
		}
		return $this->id;
	}

	function close() {
		fclose($this->id);
	}

	function read($bytes = 1024) {
		return fgets($this->id, $bytes);
	}

	function write($data) {
		fwrite($this->id, $data);
	}

	function exists() {
		return file_exists($this->file);
	}

	function eof() {
		return feof($this->id);
	}

	function time() {
		return ($this->exists() ? filemtime($this->file) : false);
	}

	function write_once($data) {
		if (!$this->open('w')) {
			return false;
		}

		$this->write($data);
		$this->close();
		return true;
	}

	function read_all() {
		$buffer = '';
		while (!$this->eof()) {
			$buffer .= $this->read();
		}

		return $buffer;
	}

	function read_once() {
		if (!$this->open('r')) {
			return false;
		}

		$buffer = $this->read_all();
		$this->close();
		return $buffer;
	}

	function is_uptodate($time) {
		return $this->time() >= $time;
	}

}

?>