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829 lines
25 KiB
829 lines
25 KiB
<?php
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/*
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* This file is part of Mustache.php.
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*
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* (c) 2010-2017 Justin Hileman
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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/**
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* A Mustache implementation in PHP.
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*
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* {@link http://defunkt.github.com/mustache}
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*
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* Mustache is a framework-agnostic logic-less templating language. It enforces separation of view
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* logic from template files. In fact, it is not even possible to embed logic in the template.
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*
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* This is very, very rad.
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*
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* @author Justin Hileman {@link http://justinhileman.com}
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*/
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class Mustache_Engine
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{
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const VERSION = '2.13.0';
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const SPEC_VERSION = '1.1.2';
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const PRAGMA_FILTERS = 'FILTERS';
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const PRAGMA_BLOCKS = 'BLOCKS';
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const PRAGMA_ANCHORED_DOT = 'ANCHORED-DOT';
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// Known pragmas
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private static $knownPragmas = array(
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self::PRAGMA_FILTERS => true,
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self::PRAGMA_BLOCKS => true,
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self::PRAGMA_ANCHORED_DOT => true,
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);
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// Template cache
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private $templates = array();
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// Environment
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private $templateClassPrefix = '__Mustache_';
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private $cache;
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private $lambdaCache;
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private $cacheLambdaTemplates = false;
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private $loader;
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private $partialsLoader;
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private $helpers;
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private $escape;
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private $entityFlags = ENT_COMPAT;
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private $charset = 'UTF-8';
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private $logger;
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private $strictCallables = false;
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private $pragmas = array();
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private $delimiters;
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// Services
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private $tokenizer;
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private $parser;
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private $compiler;
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/**
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* Mustache class constructor.
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*
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* Passing an $options array allows overriding certain Mustache options during instantiation:
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*
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* $options = array(
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* // The class prefix for compiled templates. Defaults to '__Mustache_'.
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* 'template_class_prefix' => '__MyTemplates_',
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*
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* // A Mustache cache instance or a cache directory string for compiled templates.
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* // Mustache will not cache templates unless this is set.
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* 'cache' => dirname(__FILE__).'/tmp/cache/mustache',
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*
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* // Override default permissions for cache files. Defaults to using the system-defined umask. It is
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* // *strongly* recommended that you configure your umask properly rather than overriding permissions here.
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* 'cache_file_mode' => 0666,
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*
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* // Optionally, enable caching for lambda section templates. This is generally not recommended, as lambda
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* // sections are often too dynamic to benefit from caching.
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* 'cache_lambda_templates' => true,
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*
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* // Customize the tag delimiters used by this engine instance. Note that overriding here changes the
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* // delimiters used to parse all templates and partials loaded by this instance. To override just for a
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* // single template, use an inline "change delimiters" tag at the start of the template file:
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* //
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* // {{=<% %>=}}
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* //
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* 'delimiters' => '<% %>',
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*
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* // A Mustache template loader instance. Uses a StringLoader if not specified.
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* 'loader' => new Mustache_Loader_FilesystemLoader(dirname(__FILE__).'/views'),
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*
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* // A Mustache loader instance for partials.
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* 'partials_loader' => new Mustache_Loader_FilesystemLoader(dirname(__FILE__).'/views/partials'),
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*
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* // An array of Mustache partials. Useful for quick-and-dirty string template loading, but not as
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* // efficient or lazy as a Filesystem (or database) loader.
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* 'partials' => array('foo' => file_get_contents(dirname(__FILE__).'/views/partials/foo.mustache')),
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*
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* // An array of 'helpers'. Helpers can be global variables or objects, closures (e.g. for higher order
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* // sections), or any other valid Mustache context value. They will be prepended to the context stack,
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* // so they will be available in any template loaded by this Mustache instance.
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* 'helpers' => array('i18n' => function ($text) {
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* // do something translatey here...
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* }),
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*
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* // An 'escape' callback, responsible for escaping double-mustache variables.
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* 'escape' => function ($value) {
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* return htmlspecialchars($buffer, ENT_COMPAT, 'UTF-8');
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* },
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*
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* // Type argument for `htmlspecialchars`. Defaults to ENT_COMPAT. You may prefer ENT_QUOTES.
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* 'entity_flags' => ENT_QUOTES,
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*
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* // Character set for `htmlspecialchars`. Defaults to 'UTF-8'. Use 'UTF-8'.
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* 'charset' => 'ISO-8859-1',
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*
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* // A Mustache Logger instance. No logging will occur unless this is set. Using a PSR-3 compatible
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* // logging library -- such as Monolog -- is highly recommended. A simple stream logger implementation is
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* // available as well:
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* 'logger' => new Mustache_Logger_StreamLogger('php://stderr'),
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*
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* // Only treat Closure instances and invokable classes as callable. If true, values like
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* // `array('ClassName', 'methodName')` and `array($classInstance, 'methodName')`, which are traditionally
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* // "callable" in PHP, are not called to resolve variables for interpolation or section contexts. This
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* // helps protect against arbitrary code execution when user input is passed directly into the template.
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* // This currently defaults to false, but will default to true in v3.0.
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* 'strict_callables' => true,
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*
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* // Enable pragmas across all templates, regardless of the presence of pragma tags in the individual
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* // templates.
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* 'pragmas' => [Mustache_Engine::PRAGMA_FILTERS],
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* );
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*
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* @throws Mustache_Exception_InvalidArgumentException If `escape` option is not callable
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*
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* @param array $options (default: array())
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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['template_class_prefix'])) {
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if ((string) $options['template_class_prefix'] === '') {
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throw new Mustache_Exception_InvalidArgumentException('Mustache Constructor "template_class_prefix" must not be empty');
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}
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$this->templateClassPrefix = $options['template_class_prefix'];
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}
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if (isset($options['cache'])) {
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$cache = $options['cache'];
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if (is_string($cache)) {
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$mode = isset($options['cache_file_mode']) ? $options['cache_file_mode'] : null;
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$cache = new Mustache_Cache_FilesystemCache($cache, $mode);
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}
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$this->setCache($cache);
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}
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if (isset($options['cache_lambda_templates'])) {
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$this->cacheLambdaTemplates = (bool) $options['cache_lambda_templates'];
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}
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if (isset($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['partials'])) {
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$this->setPartials($options['partials']);
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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['escape'])) {
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if (!is_callable($options['escape'])) {
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throw new Mustache_Exception_InvalidArgumentException('Mustache Constructor "escape" option must be callable');
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}
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$this->escape = $options['escape'];
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}
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if (isset($options['entity_flags'])) {
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$this->entityFlags = $options['entity_flags'];
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}
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if (isset($options['charset'])) {
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$this->charset = $options['charset'];
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}
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if (isset($options['logger'])) {
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$this->setLogger($options['logger']);
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}
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if (isset($options['strict_callables'])) {
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$this->strictCallables = $options['strict_callables'];
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}
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if (isset($options['delimiters'])) {
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$this->delimiters = $options['delimiters'];
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}
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if (isset($options['pragmas'])) {
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foreach ($options['pragmas'] as $pragma) {
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if (!isset(self::$knownPragmas[$pragma])) {
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throw new Mustache_Exception_InvalidArgumentException(sprintf('Unknown pragma: "%s".', $pragma));
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}
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$this->pragmas[$pragma] = true;
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}
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}
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}
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/**
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* Shortcut 'render' invocation.
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*
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* Equivalent to calling `$mustache->loadTemplate($template)->render($context);`
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*
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* @see Mustache_Engine::loadTemplate
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* @see Mustache_Template::render
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*
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* @param string $template
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* @param mixed $context (default: array())
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*
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* @return string Rendered template
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*/
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public function render($template, $context = array())
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{
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return $this->loadTemplate($template)->render($context);
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}
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/**
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* Get the current Mustache escape callback.
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*
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* @return callable|null
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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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* Get the current Mustache entitity type to escape.
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*
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* @return int
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*/
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public function getEntityFlags()
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{
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return $this->entityFlags;
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}
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/**
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* Get the current Mustache character set.
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*
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* @return string
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*/
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public function getCharset()
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{
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return $this->charset;
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}
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/**
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* Get the current globally enabled pragmas.
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*
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* @return array
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*/
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public function getPragmas()
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{
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return array_keys($this->pragmas);
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}
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/**
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* Set the Mustache template Loader instance.
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*
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* @param Mustache_Loader $loader
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*/
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public function setLoader(Mustache_Loader $loader)
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{
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$this->loader = $loader;
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}
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/**
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* Get the current Mustache template Loader instance.
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*
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* If no Loader instance has been explicitly specified, this method will instantiate and return
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* a StringLoader instance.
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*
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* @return Mustache_Loader
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*/
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public function getLoader()
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{
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if (!isset($this->loader)) {
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$this->loader = new Mustache_Loader_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 the Mustache partials Loader instance.
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*
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* @param Mustache_Loader $partialsLoader
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*/
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public function setPartialsLoader(Mustache_Loader $partialsLoader)
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{
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$this->partialsLoader = $partialsLoader;
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}
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/**
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* Get the current Mustache partials Loader instance.
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*
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* If no Loader instance has been explicitly specified, this method will instantiate and return
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* an ArrayLoader instance.
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*
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* @return Mustache_Loader
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*/
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public function getPartialsLoader()
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{
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if (!isset($this->partialsLoader)) {
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$this->partialsLoader = new Mustache_Loader_ArrayLoader();
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}
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return $this->partialsLoader;
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}
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/**
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* Set partials for the current partials Loader instance.
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*
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* @throws Mustache_Exception_RuntimeException If the current Loader instance is immutable
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*
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* @param array $partials (default: array())
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*/
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public function setPartials(array $partials = array())
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{
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if (!isset($this->partialsLoader)) {
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$this->partialsLoader = new Mustache_Loader_ArrayLoader();
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}
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if (!$this->partialsLoader instanceof Mustache_Loader_MutableLoader) {
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throw new Mustache_Exception_RuntimeException('Unable to set partials on an immutable Mustache Loader instance');
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}
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$this->partialsLoader->setTemplates($partials);
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}
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/**
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* Set an array of Mustache helpers.
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*
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* An array of 'helpers'. Helpers can be global variables or objects, closures (e.g. for higher order sections), or
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* any other valid Mustache context value. They will be prepended to the context stack, so they will be available in
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* any template loaded by this Mustache instance.
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*
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* @throws Mustache_Exception_InvalidArgumentException if $helpers is not an array or Traversable
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*
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* @param array|Traversable $helpers
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*/
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public function setHelpers($helpers)
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{
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if (!is_array($helpers) && !$helpers instanceof Traversable) {
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throw new Mustache_Exception_InvalidArgumentException('setHelpers expects an array of helpers');
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}
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$this->getHelpers()->clear();
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foreach ($helpers as $name => $helper) {
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$this->addHelper($name, $helper);
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}
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}
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/**
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* Get the current set of Mustache helpers.
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*
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* @see Mustache_Engine::setHelpers
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*
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* @return Mustache_HelperCollection
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*/
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public function getHelpers()
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{
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if (!isset($this->helpers)) {
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$this->helpers = new Mustache_HelperCollection();
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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 Mustache helper.
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*
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* @see Mustache_Engine::setHelpers
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*
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* @param string $name
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* @param mixed $helper
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*/
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public function addHelper($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 Mustache helper by name.
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*
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* @see Mustache_Engine::setHelpers
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*
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* @param string $name
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*
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* @return mixed Helper
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*/
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public function getHelper($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 Mustache instance has a helper.
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*
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* @see Mustache_Engine::setHelpers
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*
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* @param string $name
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*
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* @return bool True if the helper is present
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*/
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public function hasHelper($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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* Remove a helper by name.
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*
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* @see Mustache_Engine::setHelpers
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*
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* @param string $name
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*/
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public function removeHelper($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 the Mustache Logger instance.
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*
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* @throws Mustache_Exception_InvalidArgumentException If logger is not an instance of Mustache_Logger or Psr\Log\LoggerInterface
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*
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* @param Mustache_Logger|Psr\Log\LoggerInterface $logger
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*/
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public function setLogger($logger = null)
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{
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if ($logger !== null && !($logger instanceof Mustache_Logger || is_a($logger, 'Psr\\Log\\LoggerInterface'))) {
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throw new Mustache_Exception_InvalidArgumentException('Expected an instance of Mustache_Logger or Psr\\Log\\LoggerInterface.');
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}
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if ($this->getCache()->getLogger() === null) {
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$this->getCache()->setLogger($logger);
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}
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$this->logger = $logger;
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}
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/**
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* Get the current Mustache Logger instance.
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*
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* @return Mustache_Logger|Psr\Log\LoggerInterface
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*/
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public function getLogger()
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{
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return $this->logger;
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}
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/**
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* Set the Mustache Tokenizer instance.
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*
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* @param Mustache_Tokenizer $tokenizer
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*/
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public function setTokenizer(Mustache_Tokenizer $tokenizer)
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{
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$this->tokenizer = $tokenizer;
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}
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/**
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* Get the current Mustache Tokenizer instance.
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*
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* If no Tokenizer instance has been explicitly specified, this method will instantiate and return a new one.
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*
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* @return Mustache_Tokenizer
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*/
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public function getTokenizer()
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{
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if (!isset($this->tokenizer)) {
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$this->tokenizer = new Mustache_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 Mustache Parser instance.
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*
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* @param Mustache_Parser $parser
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*/
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public function setParser(Mustache_Parser $parser)
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{
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$this->parser = $parser;
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}
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/**
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* Get the current Mustache Parser instance.
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*
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* If no Parser instance has been explicitly specified, this method will instantiate and return a new one.
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*
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* @return Mustache_Parser
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*/
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public function getParser()
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{
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if (!isset($this->parser)) {
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$this->parser = new Mustache_Parser();
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}
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return $this->parser;
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}
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/**
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* Set the Mustache Compiler instance.
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*
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* @param Mustache_Compiler $compiler
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*/
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public function setCompiler(Mustache_Compiler $compiler)
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{
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$this->compiler = $compiler;
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}
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|
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/**
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* Get the current Mustache Compiler instance.
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*
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* If no Compiler instance has been explicitly specified, this method will instantiate and return a new one.
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*
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* @return Mustache_Compiler
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*/
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public function getCompiler()
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{
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if (!isset($this->compiler)) {
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$this->compiler = new Mustache_Compiler();
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}
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return $this->compiler;
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}
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/**
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* Set the Mustache Cache instance.
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*
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* @param Mustache_Cache $cache
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*/
|
|
public function setCache(Mustache_Cache $cache)
|
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{
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if (isset($this->logger) && $cache->getLogger() === null) {
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$cache->setLogger($this->getLogger());
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}
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|
|
$this->cache = $cache;
|
|
}
|
|
|
|
/**
|
|
* Get the current Mustache Cache instance.
|
|
*
|
|
* If no Cache instance has been explicitly specified, this method will instantiate and return a new one.
|
|
*
|
|
* @return Mustache_Cache
|
|
*/
|
|
public function getCache()
|
|
{
|
|
if (!isset($this->cache)) {
|
|
$this->setCache(new Mustache_Cache_NoopCache());
|
|
}
|
|
|
|
return $this->cache;
|
|
}
|
|
|
|
/**
|
|
* Get the current Lambda Cache instance.
|
|
*
|
|
* If 'cache_lambda_templates' is enabled, this is the default cache instance. Otherwise, it is a NoopCache.
|
|
*
|
|
* @see Mustache_Engine::getCache
|
|
*
|
|
* @return Mustache_Cache
|
|
*/
|
|
protected function getLambdaCache()
|
|
{
|
|
if ($this->cacheLambdaTemplates) {
|
|
return $this->getCache();
|
|
}
|
|
|
|
if (!isset($this->lambdaCache)) {
|
|
$this->lambdaCache = new Mustache_Cache_NoopCache();
|
|
}
|
|
|
|
return $this->lambdaCache;
|
|
}
|
|
|
|
/**
|
|
* Helper method to generate a Mustache template class.
|
|
*
|
|
* This method must be updated any time options are added which make it so
|
|
* the same template could be parsed and compiled multiple different ways.
|
|
*
|
|
* @param string|Mustache_Source $source
|
|
*
|
|
* @return string Mustache Template class name
|
|
*/
|
|
public function getTemplateClassName($source)
|
|
{
|
|
// For the most part, adding a new option here should do the trick.
|
|
//
|
|
// Pick a value here which is unique for each possible way the template
|
|
// could be compiled... but not necessarily unique per option value. See
|
|
// escape below, which only needs to differentiate between 'custom' and
|
|
// 'default' escapes.
|
|
//
|
|
// Keep this list in alphabetical order :)
|
|
$chunks = array(
|
|
'charset' => $this->charset,
|
|
'delimiters' => $this->delimiters ? $this->delimiters : '{{ }}',
|
|
'entityFlags' => $this->entityFlags,
|
|
'escape' => isset($this->escape) ? 'custom' : 'default',
|
|
'key' => ($source instanceof Mustache_Source) ? $source->getKey() : 'source',
|
|
'pragmas' => $this->getPragmas(),
|
|
'strictCallables' => $this->strictCallables,
|
|
'version' => self::VERSION,
|
|
);
|
|
|
|
$key = json_encode($chunks);
|
|
|
|
// Template Source instances have already provided their own source key. For strings, just include the whole
|
|
// source string in the md5 hash.
|
|
if (!$source instanceof Mustache_Source) {
|
|
$key .= "\n" . $source;
|
|
}
|
|
|
|
return $this->templateClassPrefix . md5($key);
|
|
}
|
|
|
|
/**
|
|
* Load a Mustache Template by name.
|
|
*
|
|
* @param string $name
|
|
*
|
|
* @return Mustache_Template
|
|
*/
|
|
public function loadTemplate($name)
|
|
{
|
|
return $this->loadSource($this->getLoader()->load($name));
|
|
}
|
|
|
|
/**
|
|
* Load a Mustache partial Template by name.
|
|
*
|
|
* This is a helper method used internally by Template instances for loading partial templates. You can most likely
|
|
* ignore it completely.
|
|
*
|
|
* @param string $name
|
|
*
|
|
* @return Mustache_Template
|
|
*/
|
|
public function loadPartial($name)
|
|
{
|
|
try {
|
|
if (isset($this->partialsLoader)) {
|
|
$loader = $this->partialsLoader;
|
|
} elseif (isset($this->loader) && !$this->loader instanceof Mustache_Loader_StringLoader) {
|
|
$loader = $this->loader;
|
|
} else {
|
|
throw new Mustache_Exception_UnknownTemplateException($name);
|
|
}
|
|
|
|
return $this->loadSource($loader->load($name));
|
|
} catch (Mustache_Exception_UnknownTemplateException $e) {
|
|
// If the named partial cannot be found, log then return null.
|
|
$this->log(
|
|
Mustache_Logger::WARNING,
|
|
'Partial not found: "{name}"',
|
|
array('name' => $e->getTemplateName())
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Load a Mustache lambda Template by source.
|
|
*
|
|
* This is a helper method used by Template instances to generate subtemplates for Lambda sections. You can most
|
|
* likely ignore it completely.
|
|
*
|
|
* @param string $source
|
|
* @param string $delims (default: null)
|
|
*
|
|
* @return Mustache_Template
|
|
*/
|
|
public function loadLambda($source, $delims = null)
|
|
{
|
|
if ($delims !== null) {
|
|
$source = $delims . "\n" . $source;
|
|
}
|
|
|
|
return $this->loadSource($source, $this->getLambdaCache());
|
|
}
|
|
|
|
/**
|
|
* Instantiate and return a Mustache Template instance by source.
|
|
*
|
|
* Optionally provide a Mustache_Cache instance. This is used internally by Mustache_Engine::loadLambda to respect
|
|
* the 'cache_lambda_templates' configuration option.
|
|
*
|
|
* @see Mustache_Engine::loadTemplate
|
|
* @see Mustache_Engine::loadPartial
|
|
* @see Mustache_Engine::loadLambda
|
|
*
|
|
* @param string|Mustache_Source $source
|
|
* @param Mustache_Cache $cache (default: null)
|
|
*
|
|
* @return Mustache_Template
|
|
*/
|
|
private function loadSource($source, Mustache_Cache $cache = null)
|
|
{
|
|
$className = $this->getTemplateClassName($source);
|
|
|
|
if (!isset($this->templates[$className])) {
|
|
if ($cache === null) {
|
|
$cache = $this->getCache();
|
|
}
|
|
|
|
if (!class_exists($className, false)) {
|
|
if (!$cache->load($className)) {
|
|
$compiled = $this->compile($source);
|
|
$cache->cache($className, $compiled);
|
|
}
|
|
}
|
|
|
|
$this->log(
|
|
Mustache_Logger::DEBUG,
|
|
'Instantiating template: "{className}"',
|
|
array('className' => $className)
|
|
);
|
|
|
|
$this->templates[$className] = new $className($this);
|
|
}
|
|
|
|
return $this->templates[$className];
|
|
}
|
|
|
|
/**
|
|
* Helper method to tokenize a Mustache template.
|
|
*
|
|
* @see Mustache_Tokenizer::scan
|
|
*
|
|
* @param string $source
|
|
*
|
|
* @return array Tokens
|
|
*/
|
|
private function tokenize($source)
|
|
{
|
|
return $this->getTokenizer()->scan($source, $this->delimiters);
|
|
}
|
|
|
|
/**
|
|
* Helper method to parse a Mustache template.
|
|
*
|
|
* @see Mustache_Parser::parse
|
|
*
|
|
* @param string $source
|
|
*
|
|
* @return array Token tree
|
|
*/
|
|
private function parse($source)
|
|
{
|
|
$parser = $this->getParser();
|
|
$parser->setPragmas($this->getPragmas());
|
|
|
|
return $parser->parse($this->tokenize($source));
|
|
}
|
|
|
|
/**
|
|
* Helper method to compile a Mustache template.
|
|
*
|
|
* @see Mustache_Compiler::compile
|
|
*
|
|
* @param string|Mustache_Source $source
|
|
*
|
|
* @return string generated Mustache template class code
|
|
*/
|
|
private function compile($source)
|
|
{
|
|
$name = $this->getTemplateClassName($source);
|
|
|
|
$this->log(
|
|
Mustache_Logger::INFO,
|
|
'Compiling template to "{className}" class',
|
|
array('className' => $name)
|
|
);
|
|
|
|
if ($source instanceof Mustache_Source) {
|
|
$source = $source->getSource();
|
|
}
|
|
$tree = $this->parse($source);
|
|
|
|
$compiler = $this->getCompiler();
|
|
$compiler->setPragmas($this->getPragmas());
|
|
|
|
return $compiler->compile($source, $tree, $name, isset($this->escape), $this->charset, $this->strictCallables, $this->entityFlags);
|
|
}
|
|
|
|
/**
|
|
* Add a log record if logging is enabled.
|
|
*
|
|
* @param int $level The logging level
|
|
* @param string $message The log message
|
|
* @param array $context The log context
|
|
*/
|
|
private function log($level, $message, array $context = array())
|
|
{
|
|
if (isset($this->logger)) {
|
|
$this->logger->log($level, $message, $context);
|
|
}
|
|
}
|
|
}
|
|
|