<?php
/**
 * The View Tasks handles creating and updating view files.
 *
 * PHP 5
 *
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link          http://cakephp.org CakePHP(tm) Project
 * @package       cake.console.libs.tasks
 * @since         CakePHP(tm) v 1.2
 * @license       MIT License (http://www.opensource.org/licenses/mit-license.php)
 */
App::import('Controller', 'Controller', false);
include_once dirname(__FILE__) . DS . 'bake.php';

/**
 * Task class for creating and updating view files.
 *
 * @package       cake.console.shells.tasks
 */
class ViewTask extends BakeTask {

/**
 * Tasks to be loaded by this Task
 *
 * @var array
 * @access public
 */
	public $tasks = array('Project', 'Controller', 'DbConfig', 'Template');

/**
 * path to VIEWS directory
 *
 * @var array
 * @access public
 */
	public $path = VIEWS;

/**
 * Name of the controller being used
 *
 * @var string
 * @access public
 */
	public $controllerName = null;

/**
 * Path to controller to put views
 *
 * @var string
 * @access public
 */
	public $controllerPath = null;

/**
 * The template file to use
 *
 * @var string
 * @access public
 */
	public $template = null;

/**
 * Actions to use for scaffolding
 *
 * @var array
 * @access public
 */
	public $scaffoldActions = array('index', 'view', 'add', 'edit');

/**
 * An array of action names that don't require templates.  These
 * actions will not emit errors when doing bakeActions()
 *
 * @var array
 * @access public
 */
	public $noTemplateActions = array('delete');

/**
 * Override initialize
 *
 */
	public function initialize() {
	}

/**
 * Execution method always used for tasks
 *
 */
	public function execute() {
		parent::execute();
		if (empty($this->args)) {
			$this->_interactive();
		}
		if (empty($this->args[0])) {
			return;
		}
		if (!isset($this->connection)) {
			$this->connection = 'default';
		}
		$controller = $action = $alias = null;
		$this->controllerName = $this->_controllerName($this->args[0]);
		$this->controllerPath = $this->_controllerPath($this->controllerName);

		$this->Project->interactive = false;
		if (strtolower($this->args[0]) == 'all') {
			return $this->all();
		}

		if (isset($this->args[1])) {
			$this->template = $this->args[1];
		}
		if (isset($this->args[2])) {
			$action = $this->args[2];
		}
		if (!$action) {
			$action = $this->template;
		}
		if ($action) {
			return $this->bake($action, true);
		}

		$vars = $this->__loadController();
		$methods = $this->_methodsToBake();

		foreach ($methods as $method) {
			$content = $this->getContent($method, $vars);
			if ($content) {
				$this->bake($method, $content);
			}
		}
	}

/**
 * Get a list of actions that can / should have views baked for them.
 *
 * @return array Array of action names that should be baked
 */
	protected function _methodsToBake() {
		$methods =  array_diff(
			array_map('strtolower', get_class_methods($this->controllerName . 'Controller')),
			array_map('strtolower', get_class_methods('appcontroller'))
		);
		$scaffoldActions = false;
		if (empty($methods)) {
			$scaffoldActions = true;
			$methods = $this->scaffoldActions;
		}
		$adminRoute = $this->Project->getPrefix();
		foreach ($methods as $i => $method) {
			if ($adminRoute && isset($this->params['admin'])) {
				if ($scaffoldActions) {
					$methods[$i] = $adminRoute . $method;
					continue;
				} elseif (strpos($method, $adminRoute) === false) {
					unset($methods[$i]);
				}
			}
			if ($method[0] === '_' || $method == strtolower($this->controllerName . 'Controller')) {
				unset($methods[$i]);
			}
		}
		return $methods;
	}

/**
 * Bake All views for All controllers.
 *
 * @return void
 */
	public function all() {
		$this->Controller->interactive = false;
		$tables = $this->Controller->listAll($this->connection, false);

		$actions = null;
		if (isset($this->args[1])) {
			$actions = array($this->args[1]);
		}
		$this->interactive = false;
		foreach ($tables as $table) {
			$model = $this->_modelName($table);
			$this->controllerName = $this->_controllerName($model);
			$this->controllerPath = Inflector::underscore($this->controllerName);
			if (App::import('Model', $model)) {
				$vars = $this->__loadController();
				if (!$actions) {
					$actions = $this->_methodsToBake();
				}
				$this->bakeActions($actions, $vars);
				$actions = null;
			}
		}
	}

/**
 * Handles interactive baking
 *
 */
	protected function _interactive() {
		$this->hr();
		$this->out(sprintf("Bake View\nPath: %s", $this->path));
		$this->hr();

		$this->DbConfig->interactive = $this->Controller->interactive = $this->interactive = true;

		if (empty($this->connection)) {
			$this->connection = $this->DbConfig->getConfig();
		}

		$this->Controller->connection = $this->connection;
		$this->controllerName = $this->Controller->getName();

		$this->controllerPath = strtolower(Inflector::underscore($this->controllerName));

		$prompt = __("Would you like bake to build your views interactively?\nWarning: Choosing no will overwrite %s views if it exist.",  $this->controllerName);
		$interactive = $this->in($prompt, array('y', 'n'), 'n');

		if (strtolower($interactive) == 'n') {
			$this->interactive = false;
		}

		$prompt = __("Would you like to create some CRUD views\n(index, add, view, edit) for this controller?\nNOTE: Before doing so, you'll need to create your controller\nand model classes (including associated models).");
		$wannaDoScaffold = $this->in($prompt, array('y','n'), 'y');

		$wannaDoAdmin = $this->in(__("Would you like to create the views for admin routing?"), array('y','n'), 'n');

		if (strtolower($wannaDoScaffold) == 'y' || strtolower($wannaDoAdmin) == 'y') {
			$vars = $this->__loadController();
			if (strtolower($wannaDoScaffold) == 'y') {
				$actions = $this->scaffoldActions;
				$this->bakeActions($actions, $vars);
			}
			if (strtolower($wannaDoAdmin) == 'y') {
				$admin = $this->Project->getPrefix();
				$regularActions = $this->scaffoldActions;
				$adminActions = array();
				foreach ($regularActions as $action) {
					$adminActions[] = $admin . $action;
				}
				$this->bakeActions($adminActions, $vars);
			}
			$this->hr();
			$this->out();
			$this->out(__("View Scaffolding Complete.\n"));
		} else {
			$this->customAction();
		}
	}

/**
 * Loads Controller and sets variables for the template
 * Available template variables
 *	'modelClass', 'primaryKey', 'displayField', 'singularVar', 'pluralVar',
 *	'singularHumanName', 'pluralHumanName', 'fields', 'foreignKeys',
 *	'belongsTo', 'hasOne', 'hasMany', 'hasAndBelongsToMany'
 *
 * @return array Returns an variables to be made available to a view template
 * @access private
 */
	private function __loadController() {
		if (!$this->controllerName) {
			$this->err(__('Controller not found'));
		}

		$import = $this->controllerName;
		if ($this->plugin) {
			$import = $this->plugin . '.' . $this->controllerName;
		}

		if (!App::import('Controller', $import)) {
			$file = $this->controllerPath . '_controller.php';
			$this->err(__("The file '%s' could not be found.\nIn order to bake a view, you'll need to first create the controller.", $file));
			$this->_stop();
		}
		$controllerClassName = $this->controllerName . 'Controller';
		$controllerObj = new $controllerClassName();
		$controllerObj->plugin = $this->plugin;
		$controllerObj->constructClasses();
		$modelClass = $controllerObj->modelClass;
		$modelObj = $controllerObj->{$controllerObj->modelClass};

		if ($modelObj) {
			$primaryKey = $modelObj->primaryKey;
			$displayField = $modelObj->displayField;
			$singularVar = Inflector::variable($modelClass);
			$singularHumanName = $this->_singularHumanName($this->controllerName);
			$schema = $modelObj->schema(true);
			$fields = array_keys($schema);
			$associations = $this->__associations($modelObj);
		} else {
			$primaryKey = $displayField = null;
			$singularVar = Inflector::variable(Inflector::singularize($this->controllerName));
			$singularHumanName = $this->_singularHumanName($this->controllerName);
			$fields = $schema = $associations = array();
		}
		$pluralVar = Inflector::variable($this->controllerName);
		$pluralHumanName = $this->_pluralHumanName($this->controllerName);

		return compact('modelClass', 'schema', 'primaryKey', 'displayField', 'singularVar', 'pluralVar',
				'singularHumanName', 'pluralHumanName', 'fields','associations');
	}

/**
 * Bake a view file for each of the supplied actions
 *
 * @param array $actions Array of actions to make files for.
 * @return void
 */
	public function bakeActions($actions, $vars) {
		foreach ($actions as $action) {
			$content = $this->getContent($action, $vars);
			$this->bake($action, $content);
		}
	}

/**
 * handle creation of baking a custom action view file
 *
 * @return void
 */
	public function customAction() {
		$action = '';
		while ($action == '') {
			$action = $this->in(__('Action Name? (use lowercase_underscored function name)'));
			if ($action == '') {
				$this->out(__('The action name you supplied was empty. Please try again.'));
			}
		}
		$this->out();
		$this->hr();
		$this->out(__('The following view will be created:'));
		$this->hr();
		$this->out(__('Controller Name: %s', $this->controllerName));
		$this->out(__('Action Name:     %s', $action));
		$this->out(__('Path:            %s', $this->params['app'] . DS . $this->controllerPath . DS . Inflector::underscore($action) . ".ctp"));
		$this->hr();
		$looksGood = $this->in(__('Look okay?'), array('y','n'), 'y');
		if (strtolower($looksGood) == 'y') {
			$this->bake($action, ' ');
			$this->_stop();
		} else {
			$this->out(__('Bake Aborted.'));
		}
	}

/**
 * Assembles and writes bakes the view file.
 *
 * @param string $action Action to bake
 * @param string $content Content to write
 * @return boolean Success
 */
	public function bake($action, $content = '') {
		if ($content === true) {
			$content = $this->getContent($action);
		}
		if (empty($content)) {
			return false;
		}
		$this->out("\nBaking `$action` view file...", 1, Shell::QUIET);
		$path = $this->getPath();
		$filename = $path . $this->controllerPath . DS . Inflector::underscore($action) . '.ctp';
		return $this->createFile($filename, $content);
	}

/**
 * Builds content from template and variables
 *
 * @param string $action name to generate content to
 * @param array $vars passed for use in templates
 * @return string content from template
 */
	public function getContent($action, $vars = null) {
		if (!$vars) {
			$vars = $this->__loadController();
		}

		$this->Template->set('action', $action);
		$this->Template->set('plugin', $this->plugin);
		$this->Template->set($vars);
		$template = $this->getTemplate($action);
		if ($template) {
			return $this->Template->generate('views', $template);
		}
		return false;
	}

/**
 * Gets the template name based on the action name
 *
 * @param string $action name
 * @return string template name
 */
	public function getTemplate($action) {
		if ($action != $this->template && in_array($action, $this->noTemplateActions)) {
			return false;
		}
		if (!empty($this->template) && $action != $this->template) {
			return $this->template;
		} 
		$template = $action;
		$prefixes = Configure::read('Routing.prefixes');
		foreach ((array)$prefixes as $prefix) {
			if (strpos($template, $prefix) !== false) {
				$template = str_replace($prefix . '_', '', $template);
			}
		}
		if (in_array($template, array('add', 'edit'))) {
			$template = 'form';
		} elseif (preg_match('@(_add|_edit)$@', $template)) {
			$template = str_replace(array('_add', '_edit'), '_form', $template);
		}
		return $template;
	}

/**
 * get the option parser for this task
 *
 * @return ConsoleOptionParser
 */
	public function getOptionParser() {
		$parser = parent::getOptionParser();
		return $parser->description(
			__('Bake views for a controller, using built-in or custom templates.')
		)->addArgument('controller', array(
			'help' => __('Name of the controller views to bake.  Can be Plugin.name as a shortcut for plugin baking.')
		))->addArgument('action', array(
			'help' => __("Will bake a single action's file. core templates are (index, add, edit, view)")
		))->addArgument('alias', array(
			'help' => __('Will bake the template in <action> but create the filename after <alias>.')
		))->addOption('plugin', array(
			'short' => 'p',
			'help' => __('Plugin to bake the view into.')
		))->addOption('admin', array(
			'help' => __('Set to only bake views for a prefix in Routing.prefixes'),
			'boolean' => true
		))->addOption('connection', array(
			'short' => 'c',
			'help' => __('The connection the connected model is on.')
		))->addSubcommand('all', array(
			'help' => __('Bake all CRUD action views for all controllers. Requires models and controllers to exist.')
		))->epilog(__('Omitting all arguments and options will enter into an interactive mode.'));
	}

/**
 * Returns associations for controllers models.
 *
 * @return  array $associations
 * @access private
 */
	private function __associations($model) {
		$keys = array('belongsTo', 'hasOne', 'hasMany', 'hasAndBelongsToMany');
		$associations = array();

		foreach ($keys as $key => $type) {
			foreach ($model->{$type} as $assocKey => $assocData) {
				$associations[$type][$assocKey]['primaryKey'] = $model->{$assocKey}->primaryKey;
				$associations[$type][$assocKey]['displayField'] = $model->{$assocKey}->displayField;
				$associations[$type][$assocKey]['foreignKey'] = $assocData['foreignKey'];
				$associations[$type][$assocKey]['controller'] = Inflector::pluralize(Inflector::underscore($assocData['className']));
				$associations[$type][$assocKey]['fields'] =  array_keys($model->{$assocKey}->schema(true));
			}
		}
		return $associations;
	}
}