Application.php 6.93 KB
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<?php
/**
 * Console Application class file.
 *
 * @link http://www.yiiframework.com/
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 * @copyright Copyright (c) 2008 Yii Software LLC
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 * @license http://www.yiiframework.com/license/
 */

namespace yii\console;

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use Yii;
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use yii\base\InvalidRouteException;
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/**
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 * Application represents a console application.
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 *
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 * Application extends from [[\yii\base\Application]] by providing functionalities that are
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 * specific to console requests. In particular, it deals with console requests
 * through a command-based approach:
 *
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 * - A console application consists of one or several possible user commands;
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 * - Each user command is implemented as a class extending [[\yii\console\Controller]];
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 * - User specifies which command to run on the command line;
 * - The command processes the user request with the specified parameters.
 *
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 * The command classes should be under the namespace specified by [[controllerNamespace]].
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 * Their naming should follow the same naming convention as controllers. For example, the `help` command
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 * is implemented using the `HelpController` class.
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 *
 * To run the console application, enter the following on the command line:
 *
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 * ~~~
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 * yii <route> [--param1=value1 --param2 ...]
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 * ~~~
 *
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 * where `<route>` refers to a controller route in the form of `ModuleID/ControllerID/ActionID`
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 * (e.g. `sitemap/create`), and `param1`, `param2` refers to a set of named parameters that
 * will be used to initialize the controller action (e.g. `--since=0` specifies a `since` parameter
 * whose value is 0 and a corresponding `$since` parameter is passed to the action method).
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 *
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 * A `help` command is provided by default, which lists available commands and shows their usage.
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 * To use this command, simply type:
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 *
 * ~~~
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 * yii help
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 * ~~~
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 *
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 * @property Response $response The response component. This property is read-only.
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 *
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 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
class Application extends \yii\base\Application
{
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    /**
     * The option name for specifying the application configuration file path.
     */
    const OPTION_APPCONFIG = 'appconfig';
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    /**
     * @var string the default route of this application. Defaults to 'help',
     * meaning the `help` command.
     */
    public $defaultRoute = 'help';
    /**
     * @var boolean whether to enable the commands provided by the core framework.
     * Defaults to true.
     */
    public $enableCoreCommands = true;
    /**
     * @var Controller the currently active controller instance
     */
    public $controller;
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    /**
     * @inheritdoc
     */
    public function __construct($config = [])
    {
        $config = $this->loadConfig($config);
        parent::__construct($config);
    }
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    /**
     * Loads the configuration.
     * This method will check if the command line option [[OPTION_APPCONFIG]] is specified.
     * If so, the corresponding file will be loaded as the application configuration.
     * Otherwise, the configuration provided as the parameter will be returned back.
     * @param  array $config the configuration provided in the constructor.
     * @return array the actual configuration to be used by the application.
     */
    protected function loadConfig($config)
    {
        if (!empty($_SERVER['argv'])) {
            $option = '--' . self::OPTION_APPCONFIG . '=';
            foreach ($_SERVER['argv'] as $param) {
                if (strpos($param, $option) !== false) {
                    $path = substr($param, strlen($option));
                    if (!empty($path) && is_file($file = Yii::getAlias($path))) {
                        return require($file);
                    } else {
                        die("The configuration file does not exist: $path\n");
                    }
                }
            }
        }
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        return $config;
    }
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    /**
     * Initialize the application.
     */
    public function init()
    {
        parent::init();
        if ($this->enableCoreCommands) {
            foreach ($this->coreCommands() as $id => $command) {
                if (!isset($this->controllerMap[$id])) {
                    $this->controllerMap[$id] = $command;
                }
            }
        }
        // ensure we have the 'help' command so that we can list the available commands
        if (!isset($this->controllerMap['help'])) {
            $this->controllerMap['help'] = 'yii\console\controllers\HelpController';
        }
    }
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    /**
     * Handles the specified request.
     * @param  Request  $request the request to be handled
     * @return Response the resulting response
     */
    public function handleRequest($request)
    {
        list ($route, $params) = $request->resolve();
        $this->requestedRoute = $route;
        $result = $this->runAction($route, $params);
        if ($result instanceof Response) {
            return $result;
        } else {
            $response = $this->getResponse();
            $response->exitStatus = (int) $result;
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            return $response;
        }
    }
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    /**
     * Returns the response component.
     * @return Response the response component
     */
    public function getResponse()
    {
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        return $this->get('response');
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    }
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    /**
     * Runs a controller action specified by a route.
     * This method parses the specified route and creates the corresponding child module(s), controller and action
     * instances. It then calls [[Controller::runAction()]] to run the action with the given parameters.
     * If the route is empty, the method will use [[defaultRoute]].
     * @param  string    $route  the route that specifies the action.
     * @param  array     $params the parameters to be passed to the action
     * @return integer   the status code returned by the action execution. 0 means normal, and other values mean abnormal.
     * @throws Exception if the route is invalid
     */
    public function runAction($route, $params = [])
    {
        try {
            return parent::runAction($route, $params);
        } catch (InvalidRouteException $e) {
            throw new Exception(Yii::t('yii', 'Unknown command "{command}".', ['command' => $route]), 0, $e);
        }
    }
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    /**
     * Returns the configuration of the built-in commands.
     * @return array the configuration of the built-in commands.
     */
    public function coreCommands()
    {
        return [
            'message' => 'yii\console\controllers\MessageController',
            'help' => 'yii\console\controllers\HelpController',
            'migrate' => 'yii\console\controllers\MigrateController',
            'cache' => 'yii\console\controllers\CacheController',
            'asset' => 'yii\console\controllers\AssetController',
            'fixture' => 'yii\console\controllers\FixtureController',
        ];
    }

    /**
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     * @inheritdoc
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     */
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    public function coreComponents()
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    {
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        return array_merge([
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            'request' => ['class' => 'yii\console\Request'],
            'response' => ['class' => 'yii\console\Response'],
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        ], parent::coreComponents());
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    }
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}