1 files changed, 118 insertions, 0 deletions
diff --git a/Mustache/Loader/FilesystemLoader.php b/Mustache/Loader/FilesystemLoader.php
new file mode 100644
index 0000000..34a9ecf
--- /dev/null
+++ b/Mustache/Loader/FilesystemLoader.php
@@ -0,0 +1,118 @@
+<?php
+
+/*
+ * This file is part of Mustache.php.
+ *
+ * (c) 2012 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Mustache Template filesystem Loader implementation.
+ *
+ * An ArrayLoader instance loads Mustache Template source from the filesystem by name:
+ *
+ *     $loader = new FilesystemLoader(dirname(__FILE__).'/views');
+ *     $tpl = $loader->load('foo'); // equivalent to `file_get_contents(dirname(__FILE__).'/views/foo.mustache');
+ *
+ * This is probably the most useful Mustache Loader implementation. It can be used for partials and normal Templates:
+ *
+ *     $m = new Mustache(array(
+ *          'loader'          => new FilesystemLoader(dirname(__FILE__).'/views'),
+ *          'partials_loader' => new FilesystemLoader(dirname(__FILE__).'/views/partials'),
+ *     ));
+ *
+ * @implements Loader
+ */
+class Mustache_Loader_FilesystemLoader implements Mustache_Loader
+{
+    private $baseDir;
+    private $extension = '.mustache';
+    private $templates = array();
+
+    /**
+     * Mustache filesystem Loader constructor.
+     *
+     * Passing an $options array allows overriding certain Loader options during instantiation:
+     *
+     *     $options = array(
+     *         // The filename extension used for Mustache templates. Defaults to '.mustache'
+     *         'extension' => '.ms',
+     *     );
+     *
+     * @throws RuntimeException if $baseDir does not exist.
+     *
+     * @param string $baseDir Base directory containing Mustache template files.
+     * @param array  $options Array of Loader options (default: array())
+     */
+    public function __construct($baseDir, array $options = array())
+    {
+        $this->baseDir = rtrim(realpath($baseDir), '/');
+
+        if (!is_dir($this->baseDir)) {
+            throw new RuntimeException('FilesystemLoader baseDir must be a directory: '.$baseDir);
+        }
+
+        if (isset($options['extension'])) {
+            $this->extension = '.' . ltrim($options['extension'], '.');
+        }
+    }
+
+    /**
+     * Load a Template by name.
+     *
+     *     $loader = new FilesystemLoader(dirname(__FILE__).'/views');
+     *     $loader->load('admin/dashboard'); // loads "./views/admin/dashboard.mustache";
+     *
+     * @param string $name
+     *
+     * @return string Mustache Template source
+     */
+    public function load($name)
+    {
+        if (!isset($this->templates[$name])) {
+            $this->templates[$name] = $this->loadFile($name);
+        }
+
+        return $this->templates[$name];
+    }
+
+    /**
+     * Helper function for loading a Mustache file by name.
+     *
+     * @throws InvalidArgumentException if a template file is not found.
+     *
+     * @param string $name
+     *
+     * @return string Mustache Template source
+     */
+    protected function loadFile($name)
+    {
+        $fileName = $this->getFileName($name);
+
+        if (!file_exists($fileName)) {
+            throw new InvalidArgumentException('Template '.$name.' not found.');
+        }
+
+        return file_get_contents($fileName);
+    }
+
+    /**
+     * Helper function for getting a Mustache template file name.
+     *
+     * @param string $name
+     *
+     * @return string Template file name
+     */
+    protected function getFileName($name)
+    {
+        $fileName = $this->baseDir . '/' . $name;
+        if (substr($fileName, 0 - strlen($this->extension)) !== $this->extension) {
+            $fileName .= $this->extension;
+        }
+
+        return $fileName;
+    }
+}