<?php
/*
	File: xajaxDefaultIncludePlugin.inc.php

	Contains the default script include plugin class.

	Title: xajax default script include plugin class

	Please see <copyright.inc.php> for a detailed description, copyright
	and license information.
*/

/*
	@package xajax
	@version $Id$
	@copyright Copyright (c) 2005-2007 by Jared White & J. Max Wilson
	@copyright Copyright (c) 2008-2010 by Joseph Woolley, Steffen Konerow, Jared White  & J. Max Wilson
	@license http://www.xajaxproject.org/bsd_license.txt BSD License
*/

/*
	Class: xajaxIncludeClientScript

	Generates the SCRIPT tags necessary to 'include' the xajax javascript
	library on the browser.

	This is called when the page is first loaded.
*/
final class xajaxIncludeClientScriptPlugin extends xajaxRequestPlugin
{
	private $sJsURI;
	private $aJsFiles;
	private $sDefer;
	private $sRequestURI;
	private $sStatusMessages;
	private $sWaitCursor;
	private $sVersion;
	private $sDefaultMode;
	private $sDefaultMethod;
	private $bDebug;
	private $bVerboseDebug;
	private $nScriptLoadTimeout;
	private $bUseUncompressedScripts;
	private $bDeferScriptGeneration;
	private $sLanguage;
	private $nResponseQueueSize;
	private $sDebugOutputID;

	public function xajaxIncludeClientScriptPlugin()
	{
		$this->sJsURI = '';
		$this->aJsFiles = array();
		$this->sDefer = '';
		$this->sRequestURI = '';
		$this->sStatusMessages = 'false';
		$this->sWaitCursor = 'true';
		$this->sVersion = 'unknown';
		$this->sDefaultMode = 'asynchronous';
		$this->sDefaultMethod = 'POST';	// W3C: Method is case sensitive
		$this->bDebug = false;
		$this->bVerboseDebug = false;
		$this->nScriptLoadTimeout = 2000;
		$this->bUseUncompressedScripts = false;
		$this->bDeferScriptGeneration = false;
		$this->sLanguage = null;
		$this->nResponseQueueSize = null;
		$this->sDebugOutputID = null;
	}

	/*
		Function: configure
	*/
	public function configure($sName, $mValue)
	{
		if ('javascript URI' == $sName) {
			$this->sJsURI = $mValue;
		} else if ("javascript files" == $sName) {
			$this->aJsFiles = $mValue;
		} else if ("scriptDefferal" == $sName) {
			if (true === $mValue) $this->sDefer = "defer ";
			else $this->sDefer = "";
		} else if ("requestURI" == $sName) {
			$this->sRequestURI = $mValue;
		} else if ("statusMessages" == $sName) {
			if (true === $mValue) $this->sStatusMessages = "true";
			else $this->sStatusMessages = "false";
		} else if ("waitCursor" == $sName) {
			if (true === $mValue) $this->sWaitCursor = "true";
			else $this->sWaitCursor = "false";
		} else if ("version" == $sName) {
			$this->sVersion = $mValue;
		} else if ("defaultMode" == $sName) {
			if ("asynchronous" == $mValue || "synchronous" == $mValue)
				$this->sDefaultMode = $mValue;
		} else if ("defaultMethod" == $sName) {
			if ("POST" == $mValue || "GET" == $mValue)	// W3C: Method is case sensitive
				$this->sDefaultMethod = $mValue;
		} else if ("debug" == $sName) {
			if (true === $mValue || false === $mValue)
				$this->bDebug = $mValue;
		} else if ("verboseDebug" == $sName) {
			if (true === $mValue || false === $mValue)
				$this->bVerboseDebug = $mValue;
		} else if ("scriptLoadTimeout" == $sName) {
			$this->nScriptLoadTimeout = $mValue;
		} else if ("useUncompressedScripts" == $sName) {
			if (true === $mValue || false === $mValue)
				$this->bUseUncompressedScripts = $mValue;
		} else if ('deferScriptGeneration' == $sName) {
			if (true === $mValue || false === $mValue)
				$this->bDeferScriptGeneration = $mValue;
			else if ('deferred' == $mValue)
				$this->bDeferScriptGeneration = $mValue;
		} else if ('language' == $sName) {
			$this->sLanguage = $mValue;
		} else if ('responseQueueSize' == $sName) {
			$this->nResponseQueueSize = $mValue;
		} else if ('debugOutputID' == $sName) {
			$this->sDebugOutputID = $mValue;
		}
	}

	/*
		Function: generateClientScript
	*/
	public function generateClientScript()
	{
		if (false === $this->bDeferScriptGeneration)
		{
			$this->printJavascriptConfig();
			$this->printJavascriptInclude();
		}
		else if (true === $this->bDeferScriptGeneration)
		{
			$this->printJavascriptInclude();
		}
		else if ('deferred' == $this->bDeferScriptGeneration)
		{
			$this->printJavascriptConfig();
		}
	}

	/*
		Function: getJavascriptConfig

		Generates the xajax settings that will be used by the xajax javascript
		library when making requests back to the server.

		Returns:

		string - The javascript code necessary to configure the settings on
			the browser.
	*/
	public function getJavascriptConfig()
	{
		ob_start();
		$this->printJavascriptConfig();
		return ob_get_clean();
	}
	
	/*
		Function: printJavascriptConfig
		
		See <xajaxIncludeClientScriptPlugin::getJavascriptConfig>
	*/
	public function printJavascriptConfig()
	{
		$sCrLf = "\n";
		
		$sJsURI = $this->sJsURI;

		if ($sJsURI != '' && substr($sJsURI, -1) != '/') 
			$sJsURI .= '/';

		echo $sCrLf;
		echo '<';
		echo 'script type="text/javascript" ';
		echo $this->sDefer;
		echo 'charset="UTF-8">';
		echo $sCrLf;
		echo '/* <';
		echo '![CDATA[ */';
		echo $sCrLf;
		echo 'try { if (undefined == xajax.config) xajax.config = {}; } catch (e) { xajax = {}; xajax.config = {}; };';
		echo $sCrLf;
		echo 'xajax.config.requestURI = "';
		echo $this->sRequestURI;
		echo '";';
		echo $sCrLf;
		echo 'xajax.config.statusMessages = ';
		echo $this->sStatusMessages;
		echo ';';
		echo $sCrLf;
		echo 'xajax.config.waitCursor = ';
		echo $this->sWaitCursor;
		echo ';';
		echo $sCrLf;
		echo 'xajax.config.version = "';
		echo $this->sVersion;
		echo '";';
		echo $sCrLf;
		echo 'xajax.config.defaultMode = "';
		echo $this->sDefaultMode;
		echo '";';
		echo $sCrLf;
		echo 'xajax.config.defaultMethod = "';
		echo $this->sDefaultMethod;
		echo '";';
		echo $sCrLf;
		echo 'xajax.config.JavaScriptURI = "';
		echo $this->sJsURI;
		echo '";';

		
		if (false === (null === $this->nResponseQueueSize))
		{
			echo $sCrLf;
			echo 'xajax.config.responseQueueSize = ';
			echo $this->nResponseQueueSize;
			echo ';';
		}
		
		if (true === $this->bDebug)
		{
			if (false === (null === $this->sDebugOutputID))
			{
				echo $sCrLf;
				echo 'xajax.debug = {};';
				echo $sCrLf;
				echo 'xajax.debug.outputID = "';
				echo $this->sDebugOutputID;
				echo '";';
			}
		}
		
		echo $sCrLf;
		echo '/* ]]> */';
		echo $sCrLf;
		echo '<';
		echo '/script>';
		echo $sCrLf;
	}

	/*
		Function: getJavascriptInclude

		Generates SCRIPT tags necessary to load the javascript libraries on
		the browser.

		sJsURI - (string):  The relative or fully qualified PATH that will be
			used to compose the URI to the specified javascript files.
		aJsFiles - (array):  List of javascript files to include.

		Returns:

		string - The SCRIPT tags that will cause the browser to load the
			specified files.
	*/
	public function getJavascriptInclude()
	{
		ob_start();
		$this->printJavascriptInclude();
		return ob_get_clean();
	}
	
	/*
		Function: printJavascriptInclude
		
		See <xajaxIncludeClientScriptPlugin::getJavascriptInclude>
	*/
	public function printJavascriptInclude()
	{
		$aJsFiles = $this->aJsFiles;
		$sJsURI = $this->sJsURI;

		if (0 == count($aJsFiles)) {
			$aJsFiles[] = array($this->_getScriptFilename('xajax_js/xajax_core.js'), 'xajax');
			
			if (true === $this->bDebug)
				$aJsFiles[] = array($this->_getScriptFilename('xajax_js/xajax_debug.js'), 'xajax.debug');
			
			if (true === $this->bVerboseDebug)
				$aJsFiles[] = array($this->_getScriptFilename('xajax_js/xajax_verbose.js'), 'xajax.debug.verbose');
			
			if (null !== $this->sLanguage)
				$aJsFiles[] = array($this->_getScriptFilename('xajax_js/xajax_lang_' . $this->sLanguage . '.js'), 'xajax');
		}
		
		if ($sJsURI != '' && substr($sJsURI, -1) != '/') 
			$sJsURI .= '/';
			
		$sCrLf = "\n";
		
		foreach ($aJsFiles as $aJsFile) {
			echo '<';
			echo 'script type="text/javascript" src="';
			echo $sJsURI;
			echo $aJsFile[0];
			echo '" ';
			echo $this->sDefer;
			echo 'charset="UTF-8"><';
			echo '/script>';
			echo $sCrLf;
		}
			
		if (0 < $this->nScriptLoadTimeout) {
			foreach ($aJsFiles as $aJsFile) {
				echo '<';
				echo 'script type="text/javascript" ';
				echo $this->sDefer;
				echo 'charset="UTF-8">';
				echo $sCrLf;
				echo '/* <';
				echo '![CDATA[ */';
				echo $sCrLf;
				echo 'window.setTimeout(';
				echo $sCrLf;
				echo ' function() {';
				echo $sCrLf;
				echo '  var scriptExists = false;';
				echo $sCrLf;
				echo '  try { if (';
				echo $aJsFile[1];
				echo '.isLoaded) scriptExists = true; }';
				echo $sCrLf;
				echo '  catch (e) {}';
				echo $sCrLf;
				echo '  if (!scriptExists) {';
				echo $sCrLf;
				echo '   alert("Error: the ';
				echo $aJsFile[1];
				echo ' Javascript component could not be included. Perhaps the URL is incorrect?\nURL: ';
				echo $sJsURI;
				echo $aJsFile[0];
				echo '");';
				echo $sCrLf;
				echo '  }';
				echo $sCrLf;
				echo ' }, ';
				echo $this->nScriptLoadTimeout;
				echo ');';
				echo $sCrLf;
				echo '/* ]]> */';
				echo $sCrLf;
				echo '<';
				echo '/script>';
				echo $sCrLf;
			}
		}
	}
	
	/*
		Function: _getScriptFilename
		
		Returns the name of the script file, based on the current settings.
		
		sFilename - (string):  The base filename.
		
		Returns:
		
		string - The filename as it should be specified in the script tags
		on the browser.
	*/
	private function _getScriptFilename($sFilename)
	{
		if ($this->bUseUncompressedScripts) {
			return str_replace('.js', '_uncompressed.js', $sFilename);  
		}
		return $sFilename;
	}
}

/*
	Register the xajaxIncludeClientScriptPlugin object with the xajaxPluginManager.
*/
$objPluginManager = xajaxPluginManager::getInstance();
$objPluginManager->registerPlugin(new xajaxIncludeClientScriptPlugin(), 99);
