HummingBirdAnimeClient/public/js.php

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<?php
/**
2015-11-16 11:40:01 -05:00
* Hummingbird Anime Client
*
2015-11-16 11:40:01 -05:00
* An API client for Hummingbird to manage anime and manga watch lists
*
* @package HummingbirdAnimeClient
* @author Timothy J. Warren
* @copyright Copyright (c) 2015 - 2016
* @link https://github.com/timw4mail/HummingBirdAnimeClient
* @license MIT
*/
namespace Aviat\EasyMin;
use GuzzleHttp\Client;
use GuzzleHttp\Psr7\Request;
// Include guzzle
require_once('../vendor/autoload.php');
/**
* Simple Javascript minfier, using google closure compiler
*/
class JSMin {
protected $js_root;
protected $js_group;
protected $js_groups_file;
protected $cache_file;
protected $last_modified;
protected $requested_time;
protected $cache_modified;
public function __construct(array $config, array $groups)
{
$group = $_GET['g'];
$this->js_root = $config['js_root'];
$this->js_group = $groups[$group];
$this->js_groups_file = $config['js_groups_file'];
$this->cache_file = "{$this->js_root}cache/{$group}";
$this->last_modified = $this->get_last_modified();
$this->requested_time = (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']))
? strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE'])
: time();
$this->cache_modified = (is_file($this->cache_file))
? filemtime($this->cache_file)
: 0;
// Output some JS!
$this->send();
}
protected function send()
{
// If the browser's cached version is up to date,
// don't resend the file
if($this->last_modified === $this->requested_time)
{
header('HTTP/1.1 304 Not Modified');
exit();
}
//Determine what to do: rebuild cache, send files as is, or send cache.
// If debug is set, just concatenate
if(array_key_exists('debug', $_GET))
{
return $this->output($this->get_files());
}
else if($this->cache_modified < $this->last_modified)
{
$js = $this->minify($this->get_files());
//Make sure cache file gets created/updated
if(file_put_contents($this->cache_file, $js) === FALSE)
{
die('Cache file was not created. Make sure you have the correct folder permissions.');
}
return $this->output($js);
}
// Otherwise, send the cached file
else
{
return $this->output(file_get_contents($cache_file));
}
}
/**
* Makes a call to google closure compiler service
*
* @param array $options - Form parameters
* @return object
*/
protected function closure_call(array $options)
{
$client = new Client();
$response = $client->post('http://closure-compiler.appspot.com/compile', [
'headers' => [
'Accept-Encoding' => 'gzip',
'Content-type' => 'application/x-www-form-urlencoded'
],
'form_params' => $options
]);
return $response;
}
/**
* Do a call to the closure compiler to check for compilation errors
*
* @param array $options
* @return void
*/
protected function check_minify_errors($options)
{
$error_res = $this->closure_call($options);
$error_json = $error_res->getBody();
$error_obj = json_decode($error_json) ?: (object)[];
// Show error if exists
if ( ! empty($error_obj->errors))
{
$error_json = json_encode($error_obj, JSON_PRETTY_PRINT);
echo "console.error(${error_json});";
die();
}
}
/**
* Get Files
*
* Concatenates the javascript files for the current
* group as a string
*
* @return string
*/
protected function get_files()
{
$js = '';
foreach($this->js_group as $file)
{
$new_file = realpath("{$this->js_root}{$file}");
$js .= file_get_contents($new_file) . "\n\n";
}
return $js;
}
/**
* Get the most recent modified date
*
* @return int
*/
protected function get_last_modified()
{
$modified = array();
foreach($this->js_group as $file)
{
$new_file = realpath("{$this->js_root}{$file}");
$modified[] = filemtime($new_file);
}
//Add this page too, as well as the groups file
$modified[] = filemtime(__FILE__);
$modified[] = filemtime($this->js_groups_file);
rsort($modified);
$last_modified = $modified[0];
return $last_modified;
}
/**
* Minifies javascript using google's closure compiler
*
* @param string $js
* @return string
*/
public function minify($js)
{
$options = [
'output_info' => 'errors',
'output_format' => 'json',
'compilation_level' => 'SIMPLE_OPTIMIZATIONS',
//'compilation_level' => 'ADVANCED_OPTIMIZATIONS',
'js_code' => $js,
'language' => 'ECMASCRIPT6_STRICT',
'language_out' => 'ECMASCRIPT5_STRICT'
];
// Check for errors
$this->check_minify_errors($options);
// Now actually retrieve the compiled code
$options['output_info'] = 'compiled_code';
$res = $this->closure_call($options);
$json = $res->getBody();
$obj = json_decode($json);
return $obj->compiledCode;
}
/**
* Output the minified javascript
*
* @param int $last_modified
* @param string $js
* @return void
*/
protected function output($js)
{
//This GZIPs the js for transmission to the user
//making file size smaller and transfer rate quicker
ob_start('ob_gzhandler');
// Set important caching headers
header('Content-Type: application/javascript; charset=utf8');
header('Cache-control: public, max-age=691200, must-revalidate');
header('Last-Modified: '.gmdate('D, d M Y H:i:s', $this->last_modified).' GMT');
header('Expires: '.gmdate('D, d M Y H:i:s', (filemtime(__FILE__) + 691200)).' GMT');
echo $js;
ob_end_flush();
}
}
// --------------------------------------------------------------------------
// ! Start Minifying
// --------------------------------------------------------------------------
$config = require_once('../app/config/minify_config.php');
$groups = require_once($config['js_groups_file']);
$cache_dir = "{$config['js_root']}cache";
if ( ! is_dir($cache_dir))
{
mkdir($cache_dir);
}
if ( ! array_key_exists($_GET['g'], $groups))
{
header('Content-Type: application/javascript; charset=utf8');
echo '// You must specify a group that exists';
die();
}
new JSMin($config, $groups);
//end of js.php