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<?php
/*
* This file is part of Mustache.php.
*
* (c) 2010-2017 Justin Hileman
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/**
* A Mustache Template loader for inline templates.
*
* With the InlineLoader, templates can be defined at the end of any PHP source
* file:
*
* $loader = new Mustache_Loader_InlineLoader(__FILE__, __COMPILER_HALT_OFFSET__);
* $hello = $loader->load('hello');
* $goodbye = $loader->load('goodbye');
*
* __halt_compiler();
*
* @@ hello
* Hello, {{ planet }}!
*
* @@ goodbye
* Goodbye, cruel {{ planet }}
*
* Templates are deliniated by lines containing only `@@ name`.
*
* The InlineLoader is well-suited to micro-frameworks such as Silex:
*
* $app->register(new MustacheServiceProvider, array(
* 'mustache.loader' => new Mustache_Loader_InlineLoader(__FILE__, __COMPILER_HALT_OFFSET__)
* ));
*
* $app->get('/{name}', function ($name) use ($app) {
* return $app['mustache']->render('hello', compact('name'));
* })
* ->value('name', 'world');
*
* // ...
*
* __halt_compiler();
*
* @@ hello
* Hello, {{ name }}!
*/
class Mustache_Loader_InlineLoader implements Mustache_Loader
{
protected $fileName;
protected $offset;
protected $templates;
/**
* The InlineLoader requires a filename and offset to process templates.
*
* The magic constants `__FILE__` and `__COMPILER_HALT_OFFSET__` are usually
* perfectly suited to the job:
*
* $loader = new Mustache_Loader_InlineLoader(__FILE__, __COMPILER_HALT_OFFSET__);
*
* Note that this only works if the loader is instantiated inside the same
* file as the inline templates. If the templates are located in another
* file, it would be necessary to manually specify the filename and offset.
*
* @param string $fileName The file to parse for inline templates
* @param int $offset A string offset for the start of the templates.
* This usually coincides with the `__halt_compiler`
* call, and the `__COMPILER_HALT_OFFSET__`
*/
public function __construct($fileName, $offset)
{
if (!is_file($fileName)) {
throw new Mustache_Exception_InvalidArgumentException('InlineLoader expects a valid filename.');
}
if (!is_int($offset) || $offset < 0) {
throw new Mustache_Exception_InvalidArgumentException('InlineLoader expects a valid file offset.');
}
$this->fileName = $fileName;
$this->offset = $offset;
}
/**
* Load a Template by name.
*
* @throws Mustache_Exception_UnknownTemplateException If a template file is not found
*
* @param string $name
*
* @return string Mustache Template source
*/
public function load($name)
{
$this->loadTemplates();
if (!array_key_exists($name, $this->templates)) {
throw new Mustache_Exception_UnknownTemplateException($name);
}
return $this->templates[$name];
}
/**
* Parse and load templates from the end of a source file.
*/
protected function loadTemplates()
{
if ($this->templates === null) {
$this->templates = array();
$data = file_get_contents($this->fileName, false, null, $this->offset);
foreach (preg_split("/^@@(?= [\w\d\.]+$)/m", $data, -1) as $chunk) {
if (trim($chunk)) {
list($name, $content) = explode("\n", $chunk, 2);
$this->templates[trim($name)] = trim($content);
}
}
}
}
}
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