mirror of
https://github.com/Mibew/handlebars.php.git
synced 2025-05-26 03:46:26 +03:00
720 lines
17 KiB
PHP
Executable File
720 lines
17 KiB
PHP
Executable File
<?php
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/**
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* This file is part of Handlebars-php
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* Based on mustache-php https://github.com/bobthecow/mustache.php
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*
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* PHP version 5.3
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*
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* @category Xamin
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* @package Handlebars
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* @author fzerorubigd <fzerorubigd@gmail.com>
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* @author Behrooz Shabani <everplays@gmail.com>
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* @author Jeff Turcotte <jeff.turcotte@gmail.com>
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* @author Mária Šormanová <maria.sormanova@gmail.com>
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* @copyright 2010-2012 (c) Justin Hileman
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* @copyright 2012 (c) ParsPooyesh Co
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* @copyright 2013 (c) Behrooz Shabani
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* @license MIT <http://opensource.org/licenses/MIT>
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* @version GIT: $Id$
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* @link http://xamin.ir
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*/
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namespace Handlebars;
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use Handlebars\Loader\StringLoader;
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use Handlebars\Cache\Dummy;
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/**
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* Handlebars template engine, based on mustache.
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*
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* @category Xamin
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* @package Handlebars
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* @author fzerorubigd <fzerorubigd@gmail.com>
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* @copyright 2012 (c) ParsPooyesh Co
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* @license MIT <http://opensource.org/licenses/MIT>
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* @version Release: @package_version@
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* @link http://xamin.ir
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*/
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class Handlebars
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{
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private static $_instance = false;
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const VERSION = '1.1.0';
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/**
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* Factory method
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*
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* @param array $options see __construct's options parameter
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*
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* @return Handlebars
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*/
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public static function factory($options = array())
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{
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if (self::$_instance === false) {
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self::$_instance = new Handlebars($options);
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}
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return self::$_instance;
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}
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/**
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* Current tokenizer instance
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*
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* @var Tokenizer
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*/
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private $_tokenizer;
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/**
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* Current parser instance
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*
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* @var Parser
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*/
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private $_parser;
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/**
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* Current helper list
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*
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* @var Helpers
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*/
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private $_helpers;
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/**
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* Current loader instance
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*
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* @var Loader
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*/
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private $_loader;
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/**
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* Current partial loader instance
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*
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* @var Loader
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*/
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private $_partialsLoader;
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/**
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* Current cache instance
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*
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* @var Cache
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*/
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private $_cache;
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/**
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* @var int time to live parameter in seconds for the cache usage
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* default set to 0 which means that entries stay in cache
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* forever and are never purged
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*/
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private $_ttl = 0;
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/**
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* @var string the class to use for the template
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*/
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private $_templateClass = 'Handlebars\\Template';
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/**
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* @var callable escape function to use
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*/
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private $_escape = 'htmlspecialchars';
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/**
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* Parameters for the escpae method above
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*
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* @var array parametes to pass to escape function
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*/
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private $_escapeArgs = array(
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ENT_COMPAT,
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'UTF-8'
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);
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private $_aliases = array();
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/**
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* Handlebars engine constructor
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* $options array can contain :
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* helpers => Helpers object
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* escape => a callable function to escape values
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* escapeArgs => array to pass as extra parameter to escape function
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* loader => Loader object
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* partials_loader => Loader object
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* cache => Cache object
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* template_class => the class to use for the template object
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*
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* @param array $options array of options to set
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*
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* @throws \InvalidArgumentException
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*/
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public function __construct(array $options = array())
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{
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if (isset($options['helpers'])) {
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$this->setHelpers($options['helpers']);
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}
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if (isset($options['loader'])) {
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$this->setLoader($options['loader']);
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}
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if (isset($options['partials_loader'])) {
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$this->setPartialsLoader($options['partials_loader']);
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}
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if (isset($options['cache'])) {
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$this->setCache($options['cache']);
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}
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if (isset($options['ttl'])) {
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$this->setTtl($options['ttl']);
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}
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if (isset($options['template_class'])) {
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$this->setTemplateClass($options['template_class']);
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}
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if (isset($options['escape'])) {
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if (!is_callable($options['escape'])) {
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throw new \InvalidArgumentException(
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'Handlebars Constructor "escape" option must be callable'
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);
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}
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$this->_escape = $options['escape'];
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}
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if (isset($options['escapeArgs'])) {
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if (!is_array($options['escapeArgs'])) {
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$options['escapeArgs'] = array($options['escapeArgs']);
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}
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$this->_escapeArgs = $options['escapeArgs'];
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}
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if (isset($options['partials_alias'])
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&& is_array($options['partials_alias'])
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) {
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$this->_aliases = $options['partials_alias'];
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}
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}
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/**
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* Shortcut 'render' invocation.
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*
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* Equivalent to calling `$handlebars->loadTemplate($template)->render($data);`
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*
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* @param string $template template name
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* @param mixed $data data to use as context
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*
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* @return string Rendered template
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* @see Handlebars::loadTemplate
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* @see Template::render
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*/
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public function render($template, $data)
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{
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return $this->loadTemplate($template)->render($data);
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}
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/**
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* Set helpers for current enfine
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*
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* @param Helpers $helpers handlebars helper
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*
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* @return void
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*/
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public function setHelpers(Helpers $helpers)
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{
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$this->_helpers = $helpers;
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}
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/**
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* Get helpers, or create new one if ther is no helper
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*
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* @return Helpers
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*/
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public function getHelpers()
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{
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if (!isset($this->_helpers)) {
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$this->_helpers = new Helpers();
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}
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return $this->_helpers;
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}
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/**
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* Add a new helper.
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*
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* @param string $name helper name
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* @param mixed $helper helper callable
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*
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* @return void
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*/
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public function addHelper($name, $helper)
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{
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$this->getHelpers()->add($name, $helper);
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}
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/**
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* Get a helper by name.
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*
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* @param string $name helper name
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*
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* @return callable Helper
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*/
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public function getHelper($name)
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{
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return $this->getHelpers()->__get($name);
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}
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/**
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* Check whether this instance has a helper.
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*
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* @param string $name helper name
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*
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* @return boolean True if the helper is present
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*/
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public function hasHelper($name)
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{
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return $this->getHelpers()->has($name);
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}
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/**
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* Add a new helper.
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*
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* @param string $name helper name
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* @param mixed $helper helper callable
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*
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* @return void
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*/
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public function registerHelper($name, $helper)
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{
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$callback = function ($template, $context, $arg) use ($helper) {
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$args = $template->parseArguments($arg);
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$named = $template->parseNamedArguments($arg);
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foreach ($args as $i => $arg) {
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//if it's literally string
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if ($arg instanceof BaseString) {
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//we have no problems here
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$args[$i] = (string) $arg;
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continue;
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}
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//not sure what to do if it's not a string or StringWrapper
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if (!is_string($arg)) {
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continue;
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}
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//it's a variable and we need to figure out the value of it
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$args[$i] = $context->get($arg);
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}
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//push the options
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$args[] = array(
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//special fields
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'data' => array(
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'index' => $context->get('@index'),
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'key' => $context->get('@key'),
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'first' => $context->get('@first'),
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'last' => $context->get('@last')),
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// Named arguments
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'hash' => $named,
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// A renderer for block helper
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'fn' => function ($inContext = null) use ($context, $template) {
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$defined = !!$inContext;
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if (!$defined) {
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$inContext = $context;
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$inContext->push($inContext->last());
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} else if (!$inContext instanceof Context) {
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$inContext = new ChildContext($inContext);
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$inContext->setParent($context);
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}
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$template->setStopToken('else');
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$buffer = $template->render($inContext);
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$template->setStopToken(false);
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//what if it's a loop ?
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$template->rewind();
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//What's the point of this again?
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//I mean in this context (literally)
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//$template->discard($inContext);
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if (!$defined) {
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$inContext->pop();
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}
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return $buffer;
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},
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// A render for the else block
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'inverse' => function ($inContext = null) use ($context, $template) {
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$defined = !!$inContext;
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if (!$defined) {
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$inContext = $context;
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$inContext->push($inContext->last());
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} else if (!$inContext instanceof Context) {
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$inContext = new ChildContext($inContext);
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$inContext->setParent($context);
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}
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$template->setStopToken('else');
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$template->discard($inContext);
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$template->setStopToken(false);
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$buffer = $template->render($inContext);
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if (!$defined) {
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$inContext->pop();
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}
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return $buffer;
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},
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// The current context.
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'context' => $context,
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// The current template
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'template' => $template);
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return call_user_func_array($helper, $args);
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};
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$this->addHelper($name, $callback);
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}
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/**
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* Remove a helper by name.
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*
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* @param string $name helper name
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*
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* @return void
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*/
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public function removeHelper($name)
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{
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$this->getHelpers()->remove($name);
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}
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/**
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* Set current loader
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*
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* @param Loader $loader handlebars loader
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*
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* @return void
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*/
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public function setLoader(Loader $loader)
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{
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$this->_loader = $loader;
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}
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/**
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* Get current loader
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*
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* @return Loader
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*/
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public function getLoader()
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{
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if (!isset($this->_loader)) {
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$this->_loader = new StringLoader();
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}
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return $this->_loader;
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}
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/**
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* Set current partials loader
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*
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* @param Loader $loader handlebars loader
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*
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* @return void
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*/
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public function setPartialsLoader(Loader $loader)
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{
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$this->_partialsLoader = $loader;
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}
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/**
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* Get current partials loader
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*
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* @return Loader
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*/
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public function getPartialsLoader()
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{
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if (!isset($this->_partialsLoader)) {
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$this->_partialsLoader = new StringLoader();
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}
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return $this->_partialsLoader;
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}
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/**
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* Set cache for current engine
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*
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* @param Cache $cache handlebars cache
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*
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* @return void
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*/
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public function setCache(Cache $cache)
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{
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$this->_cache = $cache;
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}
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/**
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* Get cache
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*
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* @return Cache
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*/
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public function getCache()
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{
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if (!isset($this->_cache)) {
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$this->_cache = new Dummy();
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}
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return $this->_cache;
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}
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/**
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* Set time to live for the used cache
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*
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* @param int $ttl time to live in seconds
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*
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* @return void
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*/
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public function setTtl($ttl)
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{
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$this->_ttl = $ttl;
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}
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/**
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* Get ttl
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*
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* @return int
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*/
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public function getTtl()
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{
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return $this->_ttl;
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}
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/**
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* Get current escape function
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*
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* @return callable
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*/
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public function getEscape()
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{
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return $this->_escape;
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}
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/**
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* Set current escape function
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*
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* @param callable $escape function
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*
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* @throws \InvalidArgumentException
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* @return void
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*/
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public function setEscape($escape)
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{
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if (!is_callable($escape)) {
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throw new \InvalidArgumentException(
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'Escape function must be a callable'
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);
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}
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$this->_escape = $escape;
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}
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/**
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* Get current escape function
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*
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* @return array
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*/
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public function getEscapeArgs()
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{
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return $this->_escapeArgs;
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}
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/**
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* Set current escape function
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*
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* @param array $escapeArgs arguments to pass as extra arg to function
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*
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* @return void
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*/
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public function setEscapeArgs($escapeArgs)
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{
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if (!is_array($escapeArgs)) {
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$escapeArgs = array($escapeArgs);
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}
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$this->_escapeArgs = $escapeArgs;
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}
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/**
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* Set the Handlebars Tokenizer instance.
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*
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* @param Tokenizer $tokenizer tokenizer
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*
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* @return void
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*/
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public function setTokenizer(Tokenizer $tokenizer)
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{
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$this->_tokenizer = $tokenizer;
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}
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/**
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* Get the current Handlebars Tokenizer instance.
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*
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* If no Tokenizer instance has been explicitly specified, this method will
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* instantiate and return a new one.
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*
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* @return Tokenizer
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*/
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public function getTokenizer()
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{
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if (!isset($this->_tokenizer)) {
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$this->_tokenizer = new Tokenizer();
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}
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return $this->_tokenizer;
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}
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/**
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* Set the Handlebars Parser instance.
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*
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* @param Parser $parser parser object
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*
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* @return void
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*/
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public function setParser(Parser $parser)
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{
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$this->_parser = $parser;
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}
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/**
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* Get the current Handlebars Parser instance.
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*
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* If no Parser instance has been explicitly specified, this method will
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* instantiate and return a new one.
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*
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* @return Parser
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*/
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public function getParser()
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{
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if (!isset($this->_parser)) {
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$this->_parser = new Parser();
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}
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return $this->_parser;
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}
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/**
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* Sets the class to use for the template object
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*
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* @param string $class the class name
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*
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* @return void
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*/
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public function setTemplateClass($class)
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{
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if (!is_a($class, 'Handlebars\\Template', true)) {
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throw new \InvalidArgumentException(
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sprintf(
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'Custom template class "%s" must extend Template',
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$class
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)
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);
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}
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$this->_templateClass = $class;
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}
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|
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/**
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* Load a template by name with current template loader
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*
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* @param string $name template name
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*
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* @return Template
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*/
|
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public function loadTemplate($name)
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{
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$source = $this->getLoader()->load($name);
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$tree = $this->_tokenize($source);
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return new $this->_templateClass($this, $tree, $source);
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}
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|
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/**
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* Load a partial by name with current partial loader
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*
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* @param string $name partial name
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*
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* @return Template
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*/
|
|
public function loadPartial($name)
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{
|
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if (isset($this->_aliases[$name])) {
|
|
$name = $this->_aliases[$name];
|
|
}
|
|
$source = $this->getPartialsLoader()->load($name);
|
|
$tree = $this->_tokenize($source);
|
|
|
|
return new $this->_templateClass($this, $tree, $source);
|
|
}
|
|
|
|
/**
|
|
* Register partial alias
|
|
*
|
|
* @param string $alias Partial alias
|
|
* @param string $content The real value
|
|
*
|
|
* @return void
|
|
*/
|
|
public function registerPartial($alias, $content)
|
|
{
|
|
$this->_aliases[$alias] = $content;
|
|
}
|
|
|
|
/**
|
|
* Un-register partial alias
|
|
*
|
|
* @param string $alias Partial alias
|
|
*
|
|
* @return void
|
|
*/
|
|
public function unRegisterPartial($alias)
|
|
{
|
|
if (isset($this->_aliases[$alias])) {
|
|
unset($this->_aliases[$alias]);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Load string into a template object
|
|
*
|
|
* @param string $source string to load
|
|
*
|
|
* @return Template
|
|
*/
|
|
public function loadString($source)
|
|
{
|
|
$tree = $this->_tokenize($source);
|
|
|
|
return new $this->_templateClass($this, $tree, $source);
|
|
}
|
|
|
|
/**
|
|
* Try to tokenize source, or get them from cache if available
|
|
*
|
|
* @param string $source handlebars source code
|
|
*
|
|
* @return array handlebars parsed data into array
|
|
*/
|
|
private function _tokenize($source)
|
|
{
|
|
$hash = md5(sprintf('version: %s, data : %s', self::VERSION, $source));
|
|
$tree = $this->getCache()->get($hash);
|
|
if ($tree === false) {
|
|
$tokens = $this->getTokenizer()->scan($source);
|
|
$tree = $this->getParser()->parse($tokens);
|
|
$this->getCache()->set($hash, $tree, $this->_ttl);
|
|
}
|
|
|
|
return $tree;
|
|
}
|
|
|
|
}
|