<?php
/**
 * API shell to get CakePHP core method signatures.
 *
 * Implementation of a Cake Shell to show CakePHP core method signatures.
 *
 * PHP 5
 *
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link          http://cakephp.org CakePHP(tm) Project
 * @since         CakePHP(tm) v 1.2.0.5012
 * @license       MIT License (http://www.opensource.org/licenses/mit-license.php)
 */

App::uses('AppShell', 'Console/Command');
App::uses('File', 'Utility');

/**
 * API shell to show method signatures of CakePHP core classes.
 *
 * Implementation of a Cake Shell to show CakePHP core method signatures.
 *
 * @package       Cake.Console.Command
 */
class ApiShell extends AppShell {

/**
 * Map between short name for paths and real paths.
 *
 * @var array
 */
	public $paths = array();

/**
 * Override initialize of the Shell
 *
 * @return void
 */
	public function initialize() {
		$this->paths = array_merge($this->paths, array(
			'behavior' => CAKE . 'Model' . DS . 'Behavior' . DS,
			'cache' => CAKE . 'Cache' . DS,
			'controller' => CAKE . 'Controller' . DS,
			'component' => CAKE . 'Controller' . DS . 'Component' . DS,
			'helper' => CAKE . 'View' . DS . 'Helper' . DS,
			'model' => CAKE . 'Model' . DS,
			'view' => CAKE . 'View' . DS,
			'core' => CAKE
		));
	}

/**
 * Override main() to handle action
 *
 * @return void
 */
	public function main() {
		if (empty($this->args)) {
			return $this->out($this->OptionParser->help());
		}

		$type = strtolower($this->args[0]);

		if (isset($this->paths[$type])) {
			$path = $this->paths[$type];
		} else {
			$path = $this->paths['core'];
		}

		if (count($this->args) == 1) {
			$file = $type;
			$class = Inflector::camelize($type);
		} elseif (count($this->args) > 1) {
			$file = Inflector::underscore($this->args[1]);
			$class = Inflector::camelize($this->args[1]);
		}
		$objects = App::objects('class', $path);
		if (in_array($class, $objects)) {
			if (in_array($type, array('behavior', 'component', 'helper')) && $type !== $file) {
				if (!preg_match('/' . Inflector::camelize($type) . '$/', $class)) {
					$class .= Inflector::camelize($type);
				}
			}

		} else {
			$this->error(__d('cake_console', '%s not found', $class));
		}

		$parsed = $this->_parseClass($path . $class .'.php', $class);

		if (!empty($parsed)) {
			if (isset($this->params['method'])) {
				if (!isset($parsed[$this->params['method']])) {
					$this->err(__d('cake_console', '%s::%s() could not be found', $class, $this->params['method']));
					$this->_stop();
				}
				$method = $parsed[$this->params['method']];
				$this->out($class . '::' . $method['method'] . $method['parameters']);
				$this->hr();
				$this->out($method['comment'], true);
			} else {
				$this->out(ucwords($class));
				$this->hr();
				$i = 0;
				foreach ($parsed as $method) {
					$list[] = ++$i . ". " . $method['method'] . $method['parameters'];
				}
				$this->out($list);

				$methods = array_keys($parsed);
				while ($number = strtolower($this->in(__d('cake_console', 'Select a number to see the more information about a specific method. q to quit. l to list.'), null, 'q'))) {
					if ($number === 'q') {
						$this->out(__d('cake_console', 'Done'));
						return $this->_stop();
					}

					if ($number === 'l') {
						$this->out($list);
					}

					if (isset($methods[--$number])) {
						$method = $parsed[$methods[$number]];
						$this->hr();
						$this->out($class . '::' . $method['method'] . $method['parameters']);
						$this->hr();
						$this->out($method['comment'], true);
					}
				}
			}
		}
	}

/**
 * Get and configure the optionparser.
 *
 * @return ConsoleOptionParser
 */
	public function getOptionParser() {
		$parser = parent::getOptionParser();
		$parser->addArgument('type', array(
			'help' => __d('cake_console', 'Either a full path or type of class (model, behavior, controller, component, view, helper)')
		))->addArgument('className', array(
			'help' => __d('cake_console', 'A CakePHP core class name (e.g: Component, HtmlHelper).')
		))->addOption('method', array(
			'short' => 'm',
			'help' => __d('cake_console', 'The specific method you want help on.')
		))->description(__d('cake_console', 'Lookup doc block comments for classes in CakePHP.'));
		return $parser;
	}

/**
 * Show help for this shell.
 *
 * @return void
 */
	public function help() {
		$head  = "Usage: cake api [<type>] <className> [-m <method>]\n";
		$head .= "-----------------------------------------------\n";
		$head .= "Parameters:\n\n";

		$commands = array(
			'path' => "\t<type>\n" .
				"\t\tEither a full path or type of class (model, behavior, controller, component, view, helper).\n".
				"\t\tAvailable values:\n\n".
				"\t\tbehavior\tLook for class in CakePHP behavior path\n".
				"\t\tcache\tLook for class in CakePHP cache path\n".
				"\t\tcontroller\tLook for class in CakePHP controller path\n".
				"\t\tcomponent\tLook for class in CakePHP component path\n".
				"\t\thelper\tLook for class in CakePHP helper path\n".
				"\t\tmodel\tLook for class in CakePHP model path\n".
				"\t\tview\tLook for class in CakePHP view path\n",
			'className' => "\t<className>\n" .
				"\t\tA CakePHP core class name (e.g: Component, HtmlHelper).\n"
		);

		$this->out($head);
		if (!isset($this->args[1])) {
			foreach ($commands as $cmd) {
				$this->out("{$cmd}\n\n");
			}
		} elseif (isset($commands[strtolower($this->args[1])])) {
			$this->out($commands[strtolower($this->args[1])] . "\n\n");
		} else {
			$this->out(__d('cake_console', 'Command %s not found', $this->args[1]));
		}
	}

/**
 * Parse a given class (located on given file) and get public methods and their
 * signatures.
 *
 * @param string $path File path
 * @param string $class Class name
 * @return array Methods and signatures indexed by method name
 */
	protected function _parseClass($path, $class) {
		$parsed = array();

		if (!class_exists($class)) {
			if (!include_once($path)) {
				$this->err(__d('cake_console', '%s could not be found', $path));
			}
		}

		$reflection = new ReflectionClass($class);

		foreach ($reflection->getMethods() as $method) {
			if (!$method->isPublic() || strpos($method->getName(), '_') === 0) {
				continue;
			}
			if ($method->getDeclaringClass()->getName() != $class) {
				continue;
			}
			$args = array();
			foreach ($method->getParameters() as $param) {
				$paramString = '$' . $param->getName();
				if ($param->isDefaultValueAvailable()) {
					$paramString .= ' = ' . str_replace("\n", '', var_export($param->getDefaultValue(), true));
				}
				$args[] = $paramString;
			}
			$parsed[$method->getName()] = array(
				'comment' => str_replace(array('/*', '*/', '*'), '', $method->getDocComment()),
				'method' => $method->getName(),
				'parameters' => '(' . implode(', ', $args) . ')'
			);
		}
		ksort($parsed);
		return $parsed;
	}
}