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<?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 Template cascading loader implementation, which delegates to other
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 * Loader instances.
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 */
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class Mustache_Loader_CascadingLoader implements Mustache_Loader
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{
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    private $loaders;
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    /**
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     * Construct a CascadingLoader with an array of loaders.
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     *
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     *     $loader = new Mustache_Loader_CascadingLoader(array(
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     *         new Mustache_Loader_InlineLoader(__FILE__, __COMPILER_HALT_OFFSET__),
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     *         new Mustache_Loader_FilesystemLoader(__DIR__.'/templates')
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     *     ));
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     *
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     * @param Mustache_Loader[] $loaders
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     */
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    public function __construct(array $loaders = array())
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    {
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        $this->loaders = array();
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        foreach ($loaders as $loader) {
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            $this->addLoader($loader);
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        }
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    }
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    /**
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     * Add a Loader instance.
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     *
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     * @param Mustache_Loader $loader
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     */
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    public function addLoader(Mustache_Loader $loader)
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    {
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        $this->loaders[] = $loader;
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    }
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    /**
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     * Load a Template by name.
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     *
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     * @throws Mustache_Exception_UnknownTemplateException If a template file is not found
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     *
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     * @param string $name
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     *
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     * @return string Mustache Template source
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     */
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    public function load($name)
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    {
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        foreach ($this->loaders as $loader) {
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            try {
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                return $loader->load($name);
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            } catch (Mustache_Exception_UnknownTemplateException $e) {
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                // do nothing, check the next loader.
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            }
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        }
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        throw new Mustache_Exception_UnknownTemplateException($name);
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    }
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}