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<?php
namespace Jasny\View;
use Jasny\ViewInterface;
use Psr\Http\Message\ResponseInterface;
/**
* Abstraction use PHP templates as views with PSR-7
*/
class PHP implements ViewInterface
{
/**
* @var string
*/
protected $path;
/**
* @var string
*/
protected $ext = 'php';
/**
* Class constructor
*
* @param array $options
*/
public function __construct(array $options)
{
if (!isset($options['path'])) {
throw new \BadMethodCallException("'path' option is required");
}
$this->path = $options['path'];
if (isset($options['ext'])) {
$this->ext = $options['ext'];
}
}
/**
* Get directory path.
*
* @return string
*/
public function getPath()
{
return $this->path;
}
/**
* Get the default file extension
*
* @return string
*/
public function getExt()
{
return $this->ext;
}
/**
* Expose a function to the view.
*
* @param string $name Function name in template
* @param callable|null $function
* @return $this
* @throws \BadMethodCallException if function can't be exposed
*/
public function expose($name, $function = null)
{
if (function_exists($name) && (!isset($function) || $name === $function)) {
return $this;
}
throw new \BadMethodCallException("Exposing functions under an alias isn't supported with PHP views");
}
/**
* Get the path to a view file
*
* @param string $name
* @return string
*/
protected function getFilePath($name)
{
if (pathinfo($name, PATHINFO_EXTENSION) === '') {
$name .= (substr($name, -1) === '/' ? 'index' : '') . '.' . $this->getExt();
}
return rtrim($this->path, '/') . '/' . ltrim($name, '/');
}
/**
* Assert the filename and that the file exists
*
* @param string $name
* @throws \InvalidArgumentException
*/
protected function assertFile($name)
{
if (strpos($name, '..') !== false) {
throw new \InvalidArgumentException("File name '$name' isn't valid");
}
$file = $this->getFilePath($name);
if (!file_exists($file)) {
throw new \RuntimeException("View file '$file' doesn't exist");
}
}
/**
* Run the PHP script
*
* @param string $name
* @param array $context
*/
protected function runScript($name, array $context)
{
// Prevent $name and $context being available in the view script
$___ = $this->getFilePath($name);
$_context_ = $context;
unset($name, $context);
/** @see http://php.net/extract */
extract($_context_);
unset($_context_);
include $___;
}
/**
* Render and output template
*
* @param ResponseInterface $response
* @param string $name Template name
* @param array $context Template context as associated array
* @return ResponseInterface
*/
public function render(ResponseInterface $response, $name, array $context = [])
{
$this->assertFile($name);
if (!$response->hasHeader('Content-Type')) {
$response = $response->withHeader('Content-Type', 'text/html');
}
$body = $response->getBody();
ob_start(function ($buffer) use ($body) {
$body->write($buffer);
});
try {
$this->runScript($name, $context);
} finally {
ob_end_clean();
}
return $response;
}
}
|
