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shell.php

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<?php
/* SVN FILE: $Id: shell_8php-source.html 580 2008-07-01 14:45:49Z gwoo $ */
/**
 * Base class for Shells
 *
 * Long description for file
 *
 * PHP versions 4 and 5
 *
 * CakePHP(tm) :  Rapid Development Framework <http://www.cakephp.org/>
 * Copyright 2005-2008, Cake Software Foundation, Inc.
 *                              1785 E. Sahara Avenue, Suite 490-204
 *                              Las Vegas, Nevada 89104
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @filesource
 * @copyright       Copyright 2005-2008, Cake Software Foundation, Inc.
 * @link                http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
 * @package         cake
 * @subpackage      cake.cake.console.libs
 * @since           CakePHP(tm) v 1.2.0.5012
 * @version         $Revision: 580 $
 * @modifiedby      $LastChangedBy: gwoo $
 * @lastmodified    $Date: 2008-07-01 09:45:49 -0500 (Tue, 01 Jul 2008) $
 * @license         http://www.opensource.org/licenses/mit-license.php The MIT License
 */
/**
 * Base class for command-line utilities for automating programmer chores.
 *
 * @package     cake
 * @subpackage  cake.cake.console.libs
 */
class Shell extends Object {
/**
 * An instance of the ShellDispatcher object that loaded this script
 *
 * @var object
 * @access public
 */
    var $Dispatch = null;
/**
 * If true, the script will ask for permission to perform actions.
 *
 * @var boolean
 * @access public
 */
    var $interactive = true;
/**
 * Holds the DATABASE_CONFIG object for the app. Null if database.php could not be found,
 * or the app does not exist.
 *
 * @var object
 * @access public
 */
    var $DbConfig = null;
/**
 * Contains command switches parsed from the command line.
 *
 * @var array
 * @access public
 */
    var $params = array();
/**
 * Contains arguments parsed from the command line.
 *
 * @var array
 * @access public
 */
    var $args = array();
/**
 * The file name of the shell that was invoked.
 *
 * @var string
 * @access public
 */
    var $shell = null;
/**
 * The class name of the shell that was invoked.
 *
 * @var string
 * @access public
 */
    var $className = null;
/**
 * The command called if public methods are available.
 *
 * @var string
 * @access public
 */
    var $command = null;
/**
 * The name of the shell in camelized.
 *
 * @var string
 * @access public
 */
    var $name = null;
/**
 * Contains tasks to load and instantiate
 *
 * @var array
 * @access public
 */
    var $tasks = array();
/**
 * Contains the loaded tasks
 *
 * @var array
 * @access public
 */
    var $taskNames = array();
/**
 * Contains models to load and instantiate
 *
 * @var array
 * @access public
 */
    var $uses = array();
/**
 *  Constructs this Shell instance.
 *
 */
    function __construct(&$dispatch) {
        $vars = array('params', 'args', 'shell', 'shellCommand'=> 'command');
        foreach ($vars as $key => $var) {
            if (is_string($key)) {
                $this->{$var} =& $dispatch->{$key};
            } else {
                $this->{$var} =& $dispatch->{$var};
            }
        }

        $this->className = get_class($this);

        if ($this->name == null) {
            $this->name = str_replace(array('shell', 'Shell', 'task', 'Task'), '', $this->className);
        }

        $shellKey = Inflector::underscore($this->className);
        ClassRegistry::addObject($shellKey, $this);
        ClassRegistry::map($shellKey, $shellKey);

        if (!PHP5 && isset($this->args[0])) {
            if(strpos($this->className, low(Inflector::camelize($this->args[0]))) !== false) {
                $dispatch->shiftArgs();
            }
            if (low($this->command) == low(Inflector::variable($this->args[0])) && method_exists($this, $this->command)) {
                $dispatch->shiftArgs();
            }
        }

        $this->Dispatch =& $dispatch;
    }
/**
 * Initializes the Shell
 * acts as constructor for subclasses
 * allows configuration of tasks prior to shell execution
 *
 * @access public
 */
    function initialize() {
        $this->_loadModels();
    }
/**
 * Starts up the the Shell
 * allows for checking and configuring prior to command or main execution
 * can be overriden in subclasses
 *
 * @access public
 */
    function startup() {
        $this->_welcome();
    }
/**
 * Displays a header for the shell
 *
 * @access protected
 */
    function _welcome() {
        $this->out("\nWelcome to CakePHP v" . Configure::version() . " Console");
        $this->out("---------------------------------------------------------------");
        $this->out('App : '. $this->params['app']);
        $this->out('Path: '. $this->params['working']);
        $this->hr();
    }
/**
 * Loads database file and constructs DATABASE_CONFIG class
 * makes $this->DbConfig available to subclasses
 *
 * @return bool
 * @access protected
 */
    function _loadDbConfig() {
        if (config('database') && class_exists('DATABASE_CONFIG')) {
            $this->DbConfig =& new DATABASE_CONFIG();
            return true;
        }
        $this->err('Database config could not be loaded');
        $this->out('Run \'bake\' to create the database configuration');
        return false;
    }
/**
 * if var $uses = true
 * Loads AppModel file and constructs AppModel class
 * makes $this->AppModel available to subclasses
 * if var $uses is an array of models will load those models
 *
 * @return bool
 * @access protected
 */
    function _loadModels() {
        if ($this->uses === null || $this->uses === false) {
            return;
        }

        if ($this->uses === true && App::import('Model', 'AppModel')) {
            $this->AppModel =& new AppModel(false, false, false);
            return true;
        }

        if ($this->uses !== true && !empty($this->uses)) {
            $uses = is_array($this->uses) ? $this->uses : array($this->uses);
            $this->modelClass = $uses[0];

            foreach ($uses as $modelClass) {
                if (PHP5) {
                    $this->{$modelClass} = ClassRegistry::init($modelClass);
                } else {
                    $this->{$modelClass} =& ClassRegistry::init($modelClass);
                }
            }
            return true;
        }
        return false;
    }
/**
 * Loads tasks defined in var $tasks
 *
 * @return bool
 * @access public
 */
    function loadTasks() {
        if ($this->tasks === null || $this->tasks === false) {
            return;
        }

        if ($this->tasks !== true && !empty($this->tasks)) {

            $tasks = $this->tasks;
            if (!is_array($tasks)) {
                $tasks = array($tasks);
            }

            foreach ($tasks as $taskName) {
                $task = Inflector::underscore($taskName);
                $taskClass = Inflector::camelize($taskName.'Task');
                $taskKey = Inflector::underscore($taskClass);

                if (!class_exists($taskClass)) {
                    foreach ($this->Dispatch->shellPaths as $path) {
                        $taskPath = $path . 'tasks' . DS . $task.'.php';
                        if (file_exists($taskPath)) {
                            require_once $taskPath;
                            break;
                        }
                    }
                }
                if (ClassRegistry::isKeySet($taskKey)) {
                    $this->taskNames[] = $taskName;
                    if (!PHP5) {
                        $this->{$taskName} =& ClassRegistry::getObject($taskKey);
                        ClassRegistry::map($taskName, $taskKey);
                    } else {
                        $this->{$taskName} = ClassRegistry::getObject($taskKey);
                        ClassRegistry::map($taskName, $taskKey);
                    }
                } else {

                    $this->taskNames[] = $taskName;
                    if (!PHP5) {
                        $this->{$taskName} =& new $taskClass($this->Dispatch);
                    } else {
                        $this->{$taskName} = new $taskClass($this->Dispatch);
                    }
                }

                if (!isset($this->{$taskName})) {
                    $this->err("Task '".$taskName."' could not be loaded");
                    $this->_stop();
                }
            }
        }

        return false;
    }
/**
 * Prompts the user for input, and returns it.
 *
 * @param string $prompt Prompt text.
 * @param mixed $options Array or string of options.
 * @param string $default Default input value.
 * @return Either the default value, or the user-provided input.
 * @access public
 */
    function in($prompt, $options = null, $default = null) {
        if (!$this->interactive) {
            return $default;
        }
        $in = $this->Dispatch->getInput($prompt, $options, $default);

        if ($options && is_string($options)) {
            if (strpos($options, ',')) {
                $options = explode(',', $options);
            } elseif (strpos($options, '/')) {
                $options = explode('/', $options);
            } else {
                $options = array($options);
            }
        }
        if (is_array($options)) {
            while ($in == '' || ($in && (!in_array(low($in), $options) && !in_array(up($in), $options)) && !in_array($in, $options))) {
                $in = $this->Dispatch->getInput($prompt, $options, $default);
            }
        }
        if ($in) {
            return $in;
        }
    }
/**
 * Outputs to the stdout filehandle.
 *
 * @param string $string String to output.
 * @param boolean $newline If true, the outputs gets an added newline.
 * @access public
 */
    function out($string, $newline = true) {
        if (is_array($string)) {
            $str = '';
            foreach($string as $message) {
                $str .= $message ."\n";
            }
            $string = $str;
        }
        return $this->Dispatch->stdout($string, $newline);
    }
/**
 * Outputs to the stderr filehandle.
 *
 * @param string $string Error text to output.
 * @access public
 */
    function err($string) {
        if (is_array($string)) {
            $str = '';
            foreach($string as $message) {
                $str .= $message ."\n";
            }
            $string = $str;
        }
        return $this->Dispatch->stderr($string."\n");
    }
/**
 * Outputs a series of minus characters to the standard output, acts as a visual separator.
 *
 * @param boolean $newline If true, the outputs gets an added newline.
 * @access public
 */
    function hr($newline = false) {
        if ($newline) {
            $this->out("\n");
        }
        $this->out('---------------------------------------------------------------');
        if ($newline) {
            $this->out("\n");
        }
    }
/**
 * Displays a formatted error message and exits the application
 *
 * @param string $title Title of the error message
 * @param string $msg Error message
 * @access public
 */
    function error($title, $msg) {
        $out  = "$title\n";
        $out .= "$msg\n";
        $out .= "\n";
        $this->err($out);
        $this->_stop();
    }
/**
 * Will check the number args matches otherwise throw an error
 *
 * @param integer $expectedNum Expected number of paramters
 * @param string $command Command
 * @access protected
 */
    function _checkArgs($expectedNum, $command = null) {
        if (!$command) {
            $command = $this->command;
        }
        if (count($this->args) < $expectedNum) {
            $this->error("Wrong number of parameters: ".count($this->args), "Expected: {$expectedNum}\nPlease type 'cake {$this->shell} help' for help on usage of the {$this->name} {$command}");
        }
    }
/**
 * Creates a file at given path
 *
 * @param string $path Where to put the file.
 * @param string $contents Content to put in the file.
 * @return boolean Success
 * @access public
 */
    function createFile ($path, $contents) {
        $path = str_replace(DS . DS, DS, $path);
        $this->out("\n" . sprintf(__("Creating file %s", true), $path));
        if (is_file($path) && $this->interactive === true) {
            $key = $this->in(__("File exists, overwrite?", true). " {$path}",  array('y', 'n', 'q'), 'n');
            if (low($key) == 'q') {
                $this->out(__("Quitting.", true) ."\n");
                exit;
            } elseif (low($key) != 'y') {
                $this->out(__("Skip", true) ." {$path}\n");
                return false;
            }
        }
        if (!class_exists('File')) {
            uses('file');
        }

        if ($File = new File($path, true)) {
            $data = $File->prepare($contents);
            $File->write($data);
            $this->out(__("Wrote", true) ." {$path}");
            return true;
        } else {
            $this->err(__("Error! Could not write to", true)." {$path}.\n");
            return false;
        }
    }
/**
 * Outputs usage text on the standard output. Implement it in subclasses.
 *
 * @access public
 */
    function help() {
        if ($this->command != null) {
            $this->err("Unknown {$this->name} command '$this->command'.\nFor usage, try 'cake {$this->shell} help'.\n\n");
        } else {
            $this->Dispatch->help();
        }
    }
/**
 * Action to create a Unit Test
 *
 * @return boolean Success
 * @access protected
 */
    function _checkUnitTest() {
        if (is_dir(VENDORS.'simpletest') || is_dir(ROOT.DS.APP_DIR.DS.'vendors'.DS.'simpletest')) {
            return true;
        }
        $unitTest = $this->in('Cake test suite not installed.  Do you want to bake unit test files anyway?', array('y','n'), 'y');
        $result = low($unitTest) == 'y' || low($unitTest) == 'yes';

        if ($result) {
            $this->out("\nYou can download the Cake test suite from http://cakeforge.org/projects/testsuite/", true);
        }
        return $result;
    }
/**
 * Makes absolute file path easier to read
 *
 * @param string $file Absolute file path
 * @return sting short path
 * @access public
 */
    function shortPath($file) {
        $shortPath = str_replace(ROOT, null, $file);
        $shortPath = str_replace('..'.DS, '', $shortPath);
        return r(DS.DS, DS, $shortPath);
    }
/**
 * Checks for Configure::read('Routing.admin') and forces user to input it if not enabled
 *
 * @return string Admin route to use
 * @access public
 */
    function getAdmin() {
        $admin = '';
        $cakeAdmin = null;
        $adminRoute = Configure::read('Routing.admin');
        if (!empty($adminRoute)) {
            $cakeAdmin = $adminRoute . '_';
        } else {
            $this->out('You need to enable Configure::write(\'Routing.admin\',\'admin\') in /app/config/core.php to use admin routing.');
            $this->out('What would you like the admin route to be?');
            $this->out('Example: www.example.com/admin/controller');
            while ($admin == '') {
                $admin = $this->in("What would you like the admin route to be?", null, 'admin');
            }
            if ($this->Project->cakeAdmin($admin) !== true) {
                $this->out('Unable to write to /app/config/core.php.');
                $this->out('You need to enable Configure::write(\'Routing.admin\',\'admin\') in /app/config/core.php to use admin routing.');
                $this->_stop();
            } else {
                $cakeAdmin = $admin . '_';
            }
        }
        return $cakeAdmin;
    }
/**
 * Creates the proper controller path for the specified controller class name
 *
 * @param string $name Controller class name
 * @return string Path to controller
 * @access protected
 */
    function _controllerPath($name) {
        return low(Inflector::underscore($name));
    }
/**
 * Creates the proper controller plural name for the specified controller class name
 *
 * @param string $name Controller class name
 * @return string Controller plural name
 * @access protected
 */
    function _controllerName($name) {
        return Inflector::pluralize(Inflector::camelize($name));
    }
/**
 * Creates the proper controller camelized name (singularized) for the specified name
 *
 * @param string $name Name
 * @return string Camelized and singularized controller name
 * @access protected
 */
    function _modelName($name) {
        return Inflector::camelize(Inflector::singularize($name));
    }
/**
 * Creates the proper singular model key for associations
 *
 * @param string $name Controller class name
 * @return string Singular model key
 * @access protected
 */
    function _modelKey($name) {
        return Inflector::underscore(Inflector::singularize($name)).'_id';
    }
/**
 * Creates the proper model name from a foreign key
 *
 * @param string $key Foreign key
 * @return string Model name
 * @access protected
 */
    function _modelNameFromKey($key) {
        $name = str_replace('_id', '',$key);
        return Inflector::camelize($name);
    }
/**
 * creates the singular name for use in views.
 *
 * @param string $name
 * @return string $name
 * @access protected
 */
    function _singularName($name) {
        return Inflector::variable(Inflector::singularize($name));
    }
/**
 * Creates the plural name for views
 *
 * @param string $name Name to use
 * @return string Plural name for views
 * @access protected
 */
    function _pluralName($name) {
        return Inflector::variable(Inflector::pluralize($name));
    }
/**
 * Creates the singular human name used in views
 *
 * @param string $name Controller name
 * @return string Singular human name
 * @access protected
 */
    function _singularHumanName($name) {
        return Inflector::humanize(Inflector::underscore(Inflector::singularize($name)));
    }
/**
 * Creates the plural human name used in views
 *
 * @param string $name Controller name
 * @return string Plural human name
 * @access protected
 */
    function _pluralHumanName($name) {
        return Inflector::humanize(Inflector::underscore(Inflector::pluralize($name)));
    }
}
?>

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