<?php
/**
* @package s9e\TextFormatter
* @copyright Copyright (c) 2010-2021 The s9e authors
* @license http://www.opensource.org/licenses/mit-license.php The MIT License
*/
namespace s9e\TextFormatter\Configurator;
use s9e\TextFormatter\Configurator;
use s9e\TextFormatter\Configurator\RendererGenerators\PHP;
class BundleGenerator
{
/**
* @var Configurator Configurator this instance belongs to
*/
protected $configurator;
/**
* @var callable Callback used to serialize the objects
*/
public $serializer = 'serialize';
/**
* @var string Callback used to unserialize the serialized objects (must be a string)
*/
public $unserializer = 'unserialize';
/**
* Constructor
*
* @param Configurator $configurator Configurator
*/
public function __construct(Configurator $configurator)
{
$this->configurator = $configurator;
}
/**
* Create and return the source of a bundle based on given Configurator instance
*
* Options:
*
* - autoInclude: automatically load the source of the PHP renderer (default: true)
*
* @param string $className Name of the bundle class
* @param array $options Associative array of optional settings
* @return string PHP source for the bundle
*/
public function generate($className, array $options = [])
{
// Add default options
$options += ['autoInclude' => true];
// Copy the PHP files header if applicable
if ($this->configurator->rendering->engine instanceof PHP)
{
$this->configurator->rendering->engine->phpHeader = $this->configurator->phpHeader;
}
// Get the parser and renderer
$objects = $this->configurator->finalize();
$parser = $objects['parser'];
$renderer = $objects['renderer'];
// Split the bundle's class name and its namespace
$namespace = '';
if (preg_match('#(.*)\\\\([^\\\\]+)$#', $className, $m))
{
$namespace = $m[1];
$className = $m[2];
}
// Start with the standard header
$php = [];
$php[] = $this->configurator->phpHeader;
if ($namespace)
{
$php[] = 'namespace ' . $namespace . ';';
$php[] = '';
}
// Generate and append the bundle class
$php[] = 'abstract class ' . $className . ' extends \\s9e\\TextFormatter\\Bundle';
$php[] = '{';
$php[] = ' /**';
$php[] = ' * @var s9e\\TextFormatter\\Parser Singleton instance used by parse()';
$php[] = ' */';
$php[] = ' protected static $parser;';
$php[] = '';
$php[] = ' /**';
$php[] = ' * @var s9e\\TextFormatter\\Renderer Singleton instance used by render()';
$php[] = ' */';
$php[] = ' protected static $renderer;';
$php[] = '';
// Add the event callbacks if applicable
$events = [
'beforeParse'
=> 'Callback executed before parse(), receives the original text as argument',
'afterParse'
=> 'Callback executed after parse(), receives the parsed text as argument',
'beforeRender'
=> 'Callback executed before render(), receives the parsed text as argument',
'afterRender'
=> 'Callback executed after render(), receives the output as argument',
'beforeUnparse'
=> 'Callback executed before unparse(), receives the parsed text as argument',
'afterUnparse'
=> 'Callback executed after unparse(), receives the original text as argument'
];
foreach ($events as $eventName => $eventDesc)
{
if (isset($options[$eventName]))
{
$php[] = ' /**';
$php[] = ' * @var ' . $eventDesc;
$php[] = ' */';
$php[] = ' public static $' . $eventName . ' = ' . var_export($options[$eventName], true) . ';';
$php[] = '';
}
}
if (isset($objects['js']))
{
$php[] = ' /**';
$php[] = ' * {@inheritdoc}';
$php[] = ' */';
$php[] = ' public static function getJS()';
$php[] = ' {';
$php[] = ' return ' . var_export($objects['js'], true) . ';';
$php[] = ' }';
$php[] = '';
}
$php[] = ' /**';
$php[] = ' * {@inheritdoc}';
$php[] = ' */';
$php[] = ' public static function getParser()';
$php[] = ' {';
if (isset($options['parserSetup']))
{
$php[] = ' $parser = ' . $this->exportObject($parser) . ';';
$php[] = ' ' . $this->exportCallback($namespace, $options['parserSetup'], '$parser') . ';';
$php[] = '';
$php[] = ' return $parser;';
}
else
{
$php[] = ' return ' . $this->exportObject($parser) . ';';
}
$php[] = ' }';
$php[] = '';
$php[] = ' /**';
$php[] = ' * {@inheritdoc}';
$php[] = ' */';
$php[] = ' public static function getRenderer()';
$php[] = ' {';
// If this is a PHP renderer and we know where it's saved, automatically load it as needed
if (!empty($options['autoInclude'])
&& $this->configurator->rendering->engine instanceof PHP
&& isset($this->configurator->rendering->engine->lastFilepath))
{
$className = get_class($renderer);
$filepath = realpath($this->configurator->rendering->engine->lastFilepath);
$php[] = ' if (!class_exists(' . var_export($className, true) . ', false)';
$php[] = ' && file_exists(' . var_export($filepath, true) . '))';
$php[] = ' {';
$php[] = ' include ' . var_export($filepath, true) . ';';
$php[] = ' }';
$php[] = '';
}
if (isset($options['rendererSetup']))
{
$php[] = ' $renderer = ' . $this->exportObject($renderer) . ';';
$php[] = ' ' . $this->exportCallback($namespace, $options['rendererSetup'], '$renderer') . ';';
$php[] = '';
$php[] = ' return $renderer;';
}
else
{
$php[] = ' return ' . $this->exportObject($renderer) . ';';
}
$php[] = ' }';
$php[] = '}';
return implode("\n", $php);
}
/**
* Export a given callback as PHP code
*
* @param string $namespace Namespace in which the callback is execute
* @param callable $callback Original callback
* @param string $argument Callback's argument (as PHP code)
* @return string PHP code
*/
protected function exportCallback($namespace, callable $callback, $argument)
{
if (is_array($callback) && is_string($callback[0]))
{
// Replace ['foo', 'bar'] with 'foo::bar'
$callback = $callback[0] . '::' . $callback[1];
}
if (!is_string($callback))
{
return 'call_user_func(' . var_export($callback, true) . ', ' . $argument . ')';
}
// Ensure that the callback starts with a \
if ($callback[0] !== '\\')
{
$callback = '\\' . $callback;
}
// Replace \foo\bar::baz() with bar::baz() if we're in namespace foo
if (substr($callback, 0, 2 + strlen($namespace)) === '\\' . $namespace . '\\')
{
$callback = substr($callback, 2 + strlen($namespace));
}
return $callback . '(' . $argument . ')';
}
/**
* Serialize and export a given object as PHP code
*
* @param object $obj Original object
* @return string PHP code
*/
protected function exportObject($obj)
{
// Serialize the object
$str = call_user_func($this->serializer, $obj);
// Export the object's source
$str = var_export($str, true);
return $this->unserializer . '(' . $str . ')';
}
}