[Resolvido] [Classe]textStream

Um exemplo que fiz para um amigo e que acho que pode sanar certas dúvidas.

Não documentado e relativamente feio,mas eis:

>
textStream.interface.php:

<?php
interface iTextStream {

	public function copy(textStream $textStream);
	public function setStream($stream);
	public function setStreamMode($streamMode);
	public function appendToStreamContent($content);
	public function getStream();
	public function getStreamMode();
	public function getStreamContent();
	public function open();
	public function close();
	public function clear();
	public function flush();
};
?>

textStream.exceptionClass.php:

<?php
if(!defined('textStream_exceptionClass')){

	define('textStream_exceptionClass', '');

	class textStreamException extends Exception {
 public function __toString(){
 return '<font color=\'#ff0000\'>'.$this->getMessage().'</font>'.nl2br("\n");
 }
	};
}
?>

textStream.class.php:

<?php
if(!defined('textStream_class')){

	define('textStream_class', '');
	include 'textStream.interface.php';
	include 'textStream.exceptionClass.php';

	class textStream implements iTextStream {
 const endl = "<br />\n";
 const developer = 'eibon';
 private $streamHolder;
 private $stream;
 private $streamMode;
 private $streamContent = '';
 private $isFopen = 0;

 public function __construct($stream = '', $streamMode = '', $openNow = false){
 $this->setStream($stream);
 $this->setStreamMode($streamMode);
 if($openNow) $this->open();
 }

 public function copy(textStream $textStream){
 if(!$this->isFopen()){
 $this->setStream($textStream->getStream());
 $this->setStreamMode($textStream->getStreamMode());
 $this->streamContent = $textStream->getStreamContent();
 } else {
 $this->throwE(0);
 }
 }

 public function setStream($stream){
 if($this->isFopen)
 $this->throwE(0);
 if(is_string($stream) && $stream)
 $this->stream = $stream;
 }

 public function setStreamMode($streamMode /*[=]input=0|output=1*/){
 if($this->isFopen)
 $this->throwE(0);
 if($streamMode == 0 || $streamMode == 1){
 $this->streamMode = $streamMode;
 } else {
 $this->throwE(1);
 }
 }

 public function appendToStreamContent($content){
 $this->streamContent .= $content;
 }

 public function getStream(){
 return $this->stream;
 }

 public function getStreamMode(){
 return $this->streamMode;
 }

 public function getStreamContent(){
 if($this->streamMode == 0){
 if(!$this-isFopen) $this->open();
 if(!$this->streamContent = stream_get_contents($this->streamHolder)){
 $this->throwE(4);
 }
 }
 return $this->streamContent;
 }

 public function open(){
 if($this->check()){
 $fopenMode = array('r', 'w');
 if(!$this->isFopen){
 if($this->streamHolder = fopen($this->stream, $fopenMode[$this->streamMode])){
 $this->isFopen = 1;
 return null;
 }
 } else { return null; }
 }
 $this->throwE(2);
 }

 public function close(){
 if($this->isFopen){
 fclose($this->streamHolder);
 $this->isFopen = 0;
 }
 }

 public function clear(){
 $this->streamContent = '';
 }

 public function flush(){
 if($this->streamMode === 1){
 if(!fwrite($this->streamHolder, $this->streamContent)){
 $this->throwE(3);
 }
 }
 $this->clear();
 }

 public function check(){
 if(trim($this->stream) != '' && $this->streamMode == 0 || $this->streamMode == 1)
 return true;
 return false;
 }

 public function isFopen(){
 return $this->isFopen;
 }

 private function throwE($eNumber){
 $exceptionsMessages = array();
 $exceptionMessages[] = 'A stream deve estar fechada para se setar novos parametros.';
 $exceptionMessages[] = 'Stream mode inválido.'.nl2br("\n").'[0 - input | 1 - output]';
 $exceptionMessages[] = 'Não conseguiu abrir a stream \''.$this->stream.'\' no modo \''.$this->streamMode.'\'.';
 $exceptionMessages[] = 'Não conseguiu escrever na stream '.$this->stream.'.';
 $exceptionMessages[] = 'Não conseguiu ler a stream '.$this->stream.'.';
 throw new textStreamException($exceptionMessages[$eNumber]);
 }

 public function __destruct(){
 $this->close();
 }
	}
}
?>

eibonTextStream.class.php:

<?php
if(!defined('eibonTextStream_class')){

	define('eibonTextStream_class', '');

	include 'textStream.class.php';

	class eibonTextStream extends textStream {
 public function __construct($stream = '', $streamMode = '', $openNow = false){
 parent::__construct($stream, $streamMode, $openNow);
 }

 public function __sl($string){
 parent::appendToStreamContent($string);
 }

 public function __sr(&$string){
 $string = parent::getStreamContent();
 }

 public function __destruct(){
 parent::__destruct();
 }
	}
}
?>

exemplo.php:

<?php
include 'textStream.class.php';
include 'textStream.exceptionClass.php';
include 'eibonTextStream.class.php';

//implemente isso se quiser um errorHandler

function handleError($errno, $errstr, $errfile, $errline){
	return true;
}

set_error_handler('handleError');

try {

	$textStream = new eibonTextStream('php://output', 1, true);
	$textStream->__sl('eibonTextStream class ');
	if(extension_loaded('operator')){
 $textStream << 'with operator \'<<\' overloaded'.eibonTextStream::endl;
	}
	$textStream->flush();

} catch(textStreamException $e){

	echo $e;
	exit(0);
}
?>

Abraço!