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<?php
/**
* Base class for Shells
*
* PHP 5
*
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright 2005-2012, 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('TaskCollection', 'Console');
App::uses('ConsoleOutput', 'Console');
App::uses('ConsoleInput', 'Console');
App::uses('ConsoleInputSubcommand', 'Console');
App::uses('ConsoleOptionParser', 'Console');
App::uses('File', 'Utility');

/**
* Base class for command-line utilities for automating programmer chores.
*
* @package Cake.Console
*/
class Shell extends Object {

/**
* Output constants for making verbose and quiet shells.
*/
const VERBOSE = 2;
const NORMAL = 1;
const QUIET = 0;

/**
* An instance of ConsoleOptionParser that has been configured for this class.
*
* @var ConsoleOptionParser
*/
public $OptionParser;

/**
* If true, the script will ask for permission to perform actions.
*
* @var boolean
*/
public $interactive = true;

/**
* Contains command switches parsed from the command line.
*
* @var array
*/
public $params = array();

/**
* The command (method/task) that is being run.
*
* @var string
*/
public $command;

/**
* Contains arguments parsed from the command line.
*
* @var array
*/
public $args = array();

/**
* The name of the shell in camelized.
*
* @var string
*/
public $name = null;

/**
* The name of the plugin the shell belongs to.
* Is automatically set by ShellDispatcher when a shell is constructed.
*
* @var string
*/
public $plugin = null;

/**
* Contains tasks to load and instantiate
*
* @var array
* @link http://book.cakephp.org/2.0/en/console-and-shells.html#Shell::$tasks
*/
public $tasks = array();

/**
* Contains the loaded tasks
*
* @var array
*/
public $taskNames = array();

/**
* Contains models to load and instantiate
*
* @var array
* @link http://book.cakephp.org/2.0/en/console-and-shells.html#Shell::$uses
*/
public $uses = array();

/**
* Task Collection for the command, used to create Tasks.
*
* @var TaskCollection
*/
public $Tasks;

/**
* Normalized map of tasks.
*
* @var string
*/
protected $_taskMap = array();

/**
* stdout object.
*
* @var ConsoleOutput
*/
public $stdout;

/**
* stderr object.
*
* @var ConsoleOutput
*/
public $stderr;

/**
* stdin object
*
* @var ConsoleInput
*/
public $stdin;

/**
* Constructs this Shell instance.
*
* @param ConsoleOutput $stdout A ConsoleOutput object for stdout.
* @param ConsoleOutput $stderr A ConsoleOutput object for stderr.
* @param ConsoleInput $stdin A ConsoleInput object for stdin.
* @link http://book.cakephp.org/2.0/en/console-and-shells.html#Shell
*/
public function __construct($stdout = null, $stderr = null, $stdin = null) {
if ($this->name == null) {
$this->name = Inflector::camelize(str_replace(array('Shell', 'Task'), '', get_class($this)));
}
$this->Tasks = new TaskCollection($this);

$this->stdout = $stdout;
$this->stderr = $stderr;
$this->stdin = $stdin;
if ($this->stdout == null) {
$this->stdout = new ConsoleOutput('php://stdout');
}
if ($this->stderr == null) {
$this->stderr = new ConsoleOutput('php://stderr');
}
if ($this->stdin == null) {
$this->stdin = new ConsoleInput('php://stdin');
}

$parent = get_parent_class($this);
if ($this->tasks !== null && $this->tasks !== false) {
$this->_mergeVars(array('tasks'), $parent, true);
}
if ($this->uses !== null && $this->uses !== false) {
$this->_mergeVars(array('uses'), $parent, false);
}
}

/**
* Initializes the Shell
* acts as constructor for subclasses
* allows configuration of tasks prior to shell execution
*
* @return void
* @link http://book.cakephp.org/2.0/en/console-and-shells.html#Shell::initialize
*/
public function initialize() {
$this->_loadModels();
}

/**
* Starts up the Shell and displays the welcome message.
* Allows for checking and configuring prior to command or main execution
*
* Override this method if you want to remove the welcome information,
* or otherwise modify the pre-command flow.
*
* @return void
* @link http://book.cakephp.org/2.0/en/console-and-shells.html#Shell::startup
*/
public function startup() {
$this->_welcome();
}

/**
* Displays a header for the shell
*
* @return void
*/
protected function _welcome() {
$this->out();
$this->out(__d('cake_console', '<info>Welcome to CakePHP %s Console</info>', 'v' . Configure::version()));
$this->hr();
$this->out(__d('cake_console', 'App : %s', APP_DIR));
$this->out(__d('cake_console', 'Path: %s', APP));
$this->hr();
}

/**
* If $uses = true
* Loads AppModel file and constructs AppModel class
* makes $this->AppModel available to subclasses
* If public $uses is an array of models will load those models
*
* @return boolean
*/
protected function _loadModels() {
if ($this->uses === null || $this->uses === false) {
return;
}
App::uses('ClassRegistry', 'Utility');

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

$modelClassName = $uses[0];
if (strpos($uses[0], '.') !== false) {
list($plugin, $modelClassName) = explode('.', $uses[0]);
}
$this->modelClass = $modelClassName;

foreach ($uses as $modelClass) {
list($plugin, $modelClass) = pluginSplit($modelClass, true);
$this->{$modelClass} = ClassRegistry::init($plugin . $modelClass);
}
return true;
}
return false;
}

/**
* Loads tasks defined in public $tasks
*
* @return boolean
*/
public function loadTasks() {
if ($this->tasks === true || empty($this->tasks) || empty($this->Tasks)) {
return true;
}
$this->_taskMap = TaskCollection::normalizeObjectArray((array)$this->tasks);
foreach ($this->_taskMap as $task => $properties) {
$this->taskNames[] = $task;
}
return true;
}

/**
* Check to see if this shell has a task with the provided name.
*
* @param string $task The task name to check.
* @return boolean Success
* @link http://book.cakephp.org/2.0/en/console-and-shells.html#Shell::hasTask
*/
public function hasTask($task) {
return isset($this->_taskMap[Inflector::camelize($task)]);
}

/**
* Check to see if this shell has a callable method by the given name.
*
* @param string $name The method name to check.
* @return boolean
* @link http://book.cakephp.org/2.0/en/console-and-shells.html#Shell::hasMethod
*/
public function hasMethod($name) {
try {
$method = new ReflectionMethod($this, $name);
if (!$method->isPublic() || substr($name, 0, 1) === '_') {
return false;
}
if ($method->getDeclaringClass()->name == 'Shell') {
return false;
}
return true;
} catch (ReflectionException $e) {
return false;
}
}

/**
* Dispatch a command to another Shell. Similar to Object::requestAction()
* but intended for running shells from other shells.
*
* ### Usage:
*
* With a string command:
*
* `return $this->dispatchShell('schema create DbAcl');`
*
* Avoid using this form if you have string arguments, with spaces in them.
* The dispatched will be invoked incorrectly. Only use this form for simple
* command dispatching.
*
* With an array command:
*
* `return $this->dispatchShell('schema', 'create', 'i18n', '--dry');`
*
* @return mixed The return of the other shell.
* @link http://book.cakephp.org/2.0/en/console-and-shells.html#Shell::dispatchShell
*/
public function dispatchShell() {
$args = func_get_args();
if (is_string($args[0]) && count($args) == 1) {
$args = explode(' ', $args[0]);
}

$Dispatcher = new ShellDispatcher($args, false);
return $Dispatcher->dispatch();
}

/**
* Runs the Shell with the provided argv.
*
* Delegates calls to Tasks and resolves methods inside the class. Commands are looked
* up with the following order:
*
* - Method on the shell.
* - Matching task name.
* - `main()` method.
*
* If a shell implements a `main()` method, all missing method calls will be sent to
* `main()` with the original method name in the argv.
*
* @param string $command The command name to run on this shell. If this argument is empty,
* and the shell has a `main()` method, that will be called instead.
* @param array $argv Array of arguments to run the shell with. This array should be missing the shell name.
* @return void
* @link http://book.cakephp.org/2.0/en/console-and-shells.html#Shell::runCommand
*/
public function runCommand($command, $argv) {
$isTask = $this->hasTask($command);
$isMethod = $this->hasMethod($command);
$isMain = $this->hasMethod('main');

if ($isTask || $isMethod && $command !== 'execute') {
array_shift($argv);
}

try {
$this->OptionParser = $this->getOptionParser();
list($this->params, $this->args) = $this->OptionParser->parse($argv, $command);
} catch (ConsoleException $e) {
$this->out($this->OptionParser->help($command));
return false;
}

$this->command = $command;
if (!empty($this->params['help'])) {
return $this->_displayHelp($command);
}

if (($isTask || $isMethod || $isMain) && $command !== 'execute') {
$this->startup();
}

if ($isTask) {
$command = Inflector::camelize($command);
return $this->{$command}->runCommand('execute', $argv);
}
if ($isMethod) {
return $this->{$command}();
}
if ($isMain) {
return $this->main();
}
$this->out($this->OptionParser->help($command));
return false;
}

/**
* Display the help in the correct format
*
* @param string $command
* @return void
*/
protected function _displayHelp($command) {
$format = 'text';
if (!empty($this->args[0]) && $this->args[0] == 'xml') {
$format = 'xml';
$this->stdout->outputAs(ConsoleOutput::RAW);
} else {
$this->_welcome();
}
return $this->out($this->OptionParser->help($command, $format));
}

/**
* Gets the option parser instance and configures it.
* By overriding this method you can configure the ConsoleOptionParser before returning it.
*
* @return ConsoleOptionParser
* @link http://book.cakephp.org/2.0/en/console-and-shells.html#Shell::getOptionParser
*/
public function getOptionParser() {
$name = ($this->plugin ? $this->plugin . '.' : '') . $this->name;
$parser = new ConsoleOptionParser($name);
return $parser;
}

/**
* Overload get for lazy building of tasks
*
* @param string $name
* @return Shell Object of Task
*/
public function __get($name) {
if (empty($this->{$name}) && in_array($name, $this->taskNames)) {
$properties = $this->_taskMap[$name];
$this->{$name} = $this->Tasks->load($properties['class'], $properties['settings']);
$this->{$name}->args =& $this->args;
$this->{$name}->params =& $this->params;
$this->{$name}->initialize();
$this->{$name}->loadTasks();
}
return $this->{$name};
}

/**
* Prompts the user for input, and returns it.
*
* @param string $prompt Prompt text.
* @param mixed $options Array or string of options.
* @param string $default Default input value.
* @return mixed Either the default value, or the user-provided input.
* @link http://book.cakephp.org/2.0/en/console-and-shells.html#Shell::in
*/
public function in($prompt, $options = null, $default = null) {
if (!$this->interactive) {
return $default;
}
$originalOptions = $options;
$in = $this->_getInput($prompt, $originalOptions, $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)) {
$options = array_merge(
array_map('strtolower', $options),
array_map('strtoupper', $options),
$options
);
while ($in === '' || !in_array($in, $options)) {
$in = $this->_getInput($prompt, $originalOptions, $default);
}
}
return $in;
}

/**
* Prompts the user for input, and returns it.
*
* @param string $prompt Prompt text.
* @param mixed $options Array or string of options.
* @param string $default Default input value.
* @return Either the default value, or the user-provided input.
*/
protected function _getInput($prompt, $options, $default) {
if (!is_array($options)) {
$printOptions = '';
} else {
$printOptions = '(' . implode('/', $options) . ')';
}

if ($default === null) {
$this->stdout->write('<question>' . $prompt . '</question>' . " $printOptions \n" . '> ', 0);
} else {
$this->stdout->write('<question>' . $prompt . '</question>' . " $printOptions \n" . "[$default] > ", 0);
}
$result = $this->stdin->read();

if ($result === false) {
$this->_stop(1);
}
$result = trim($result);

if ($default !== null && ($result === '' || $result === null)) {
return $default;
}
return $result;
}

/**
* Wrap a block of text.
* Allows you to set the width, and indenting on a block of text.
*
* ### Options
*
* - `width` The width to wrap to. Defaults to 72
* - `wordWrap` Only wrap on words breaks (spaces) Defaults to true.
* - `indent` Indent the text with the string provided. Defaults to null.
*
* @param string $text Text the text to format.
* @param mixed $options Array of options to use, or an integer to wrap the text to.
* @return string Wrapped / indented text
* @see String::wrap()
* @link http://book.cakephp.org/2.0/en/console-and-shells.html#Shell::wrapText
*/
public function wrapText($text, $options = array()) {
return String::wrap($text, $options);
}

/**
* Outputs a single or multiple messages to stdout. If no parameters
* are passed outputs just a newline.
*
* ### Output levels
*
* There are 3 built-in output level. Shell::QUIET, Shell::NORMAL, Shell::VERBOSE.
* The verbose and quiet output levels, map to the `verbose` and `quiet` output switches
* present in most shells. Using Shell::QUIET for a message means it will always display.
* While using Shell::VERBOSE means it will only display when verbose output is toggled.
*
* @param mixed $message A string or a an array of strings to output
* @param integer $newlines Number of newlines to append
* @param integer $level The message's output level, see above.
* @return integer|boolean Returns the number of bytes returned from writing to stdout.
* @link http://book.cakephp.org/2.0/en/console-and-shells.html#Shell::out
*/
public function out($message = null, $newlines = 1, $level = Shell::NORMAL) {
$currentLevel = Shell::NORMAL;
if (!empty($this->params['verbose'])) {
$currentLevel = Shell::VERBOSE;
}
if (!empty($this->params['quiet'])) {
$currentLevel = Shell::QUIET;
}
if ($level <= $currentLevel) {
return $this->stdout->write($message, $newlines);
}
return true;
}

/**
* Outputs a single or multiple error messages to stderr. If no parameters
* are passed outputs just a newline.
*
* @param mixed $message A string or a an array of strings to output
* @param integer $newlines Number of newlines to append
* @return void
* @link http://book.cakephp.org/2.0/en/console-and-shells.html#Shell::err
*/
public function err($message = null, $newlines = 1) {
$this->stderr->write($message, $newlines);
}

/**
* Returns a single or multiple linefeeds sequences.
*
* @param integer $multiplier Number of times the linefeed sequence should be repeated
* @return string
* @link http://book.cakephp.org/2.0/en/console-and-shells.html#Shell::nl
*/
public function nl($multiplier = 1) {
return str_repeat(ConsoleOutput::LF, $multiplier);
}

/**
* Outputs a series of minus characters to the standard output, acts as a visual separator.
*
* @param integer $newlines Number of newlines to pre- and append
* @param integer $width Width of the line, defaults to 63
* @return void
* @link http://book.cakephp.org/2.0/en/console-and-shells.html#Shell::hr
*/
public function hr($newlines = 0, $width = 63) {
$this->out(null, $newlines);
$this->out(str_repeat('-', $width));
$this->out(null, $newlines);
}

/**
* Displays a formatted error message
* and exits the application with status code 1
*
* @param string $title Title of the error
* @param string $message An optional error message
* @return void
* @link http://book.cakephp.org/2.0/en/console-and-shells.html#Shell::error
*/
public function error($title, $message = null) {
$this->err(__d('cake_console', '<error>Error:</error> %s', $title));

if (!empty($message)) {
$this->err($message);
}
$this->_stop(1);
}

/**
* Clear the console
*
* @return void
* @link http://book.cakephp.org/2.0/en/console-and-shells.html#Shell::clear
*/
public function clear() {
if (empty($this->params['noclear'])) {
if (DS === '/') {
passthru('clear');
} else {
passthru('cls');
}
}
}

/**
* Creates a file at given path
*
* @param string $path Where to put the file.
* @param string $contents Content to put in the file.
* @return boolean Success
* @link http://book.cakephp.org/2.0/en/console-and-shells.html#Shell::createFile
*/
public function createFile($path, $contents) {
$path = str_replace(DS . DS, DS, $path);

$this->out();

if (is_file($path) && $this->interactive === true) {
$this->out(__d('cake_console', '<warning>File `%s` exists</warning>', $path));
$key = $this->in(__d('cake_console', 'Do you want to overwrite?'), array('y', 'n', 'q'), 'n');

if (strtolower($key) == 'q') {
$this->out(__d('cake_console', '<error>Quitting</error>.'), 2);
$this->_stop();
} elseif (strtolower($key) != 'y') {
$this->out(__d('cake_console', 'Skip `%s`', $path), 2);
return false;
}
} else {
$this->out(__d('cake_console', 'Creating file %s', $path));
}

$File = new File($path, true);
if ($File->exists() && $File->writable()) {
$data = $File->prepare($contents);
$File->write($data);
$this->out(__d('cake_console', '<success>Wrote</success> `%s`', $path));
return true;
} else {
$this->err(__d('cake_console', '<error>Could not write to `%s`</error>.', $path), 2);
return false;
}
}

/**
* Action to create a Unit Test
*
* @return boolean Success
*/
protected function _checkUnitTest() {
if (class_exists('PHPUnit_Framework_TestCase')) {
return true;
} elseif (@include 'PHPUnit' . DS . 'Autoload.php') {
return true;
} elseif (App::import('Vendor', 'phpunit', array('file' => 'PHPUnit' . DS . 'Autoload.php'))) {
return true;
}

$prompt = __d('cake_console', 'PHPUnit is not installed. Do you want to bake unit test files anyway?');
$unitTest = $this->in($prompt, array('y', 'n'), 'y');
$result = strtolower($unitTest) == 'y' || strtolower($unitTest) == 'yes';

if ($result) {
$this->out();
$this->out(__d('cake_console', 'You can download PHPUnit from %s', 'http://phpunit.de'));
}
return $result;
}

/**
* Makes absolute file path easier to read
*
* @param string $file Absolute file path
* @return string short path
* @link http://book.cakephp.org/2.0/en/console-and-shells.html#Shell::shortPath
*/
public function shortPath($file) {
$shortPath = str_replace(ROOT, null, $file);
$shortPath = str_replace('..' . DS, '', $shortPath);
return str_replace(DS . DS, DS, $shortPath);
}

/**
* Creates the proper controller path for the specified controller class name
*
* @param string $name Controller class name
* @return string Path to controller
*/
protected function _controllerPath($name) {
return Inflector::underscore($name);
}

/**
* Creates the proper controller plural name for the specified controller class name
*
* @param string $name Controller class name
* @return string Controller plural name
*/
protected function _controllerName($name) {
return Inflector::pluralize(Inflector::camelize($name));
}

/**
* Creates the proper model camelized name (singularized) for the specified name
*
* @param string $name Name
* @return string Camelized and singularized model name
*/
protected function _modelName($name) {
return Inflector::camelize(Inflector::singularize($name));
}

/**
* Creates the proper underscored model key for associations
*
* @param string $name Model class name
* @return string Singular model key
*/
protected function _modelKey($name) {
return Inflector::underscore($name) . '_id';
}

/**
* Creates the proper model name from a foreign key
*
* @param string $key Foreign key
* @return string Model name
*/
protected function _modelNameFromKey($key) {
return Inflector::camelize(str_replace('_id', '', $key));
}

/**
* creates the singular name for use in views.
*
* @param string $name
* @return string $name
*/
protected function _singularName($name) {
return Inflector::variable(Inflector::singularize($name));
}

/**
* Creates the plural name for views
*
* @param string $name Name to use
* @return string Plural name for views
*/
protected function _pluralName($name) {
return Inflector::variable(Inflector::pluralize($name));
}

/**
* Creates the singular human name used in views
*
* @param string $name Controller name
* @return string Singular human name
*/
protected function _singularHumanName($name) {
return Inflector::humanize(Inflector::underscore(Inflector::singularize($name)));
}

/**
* Creates the plural human name used in views
*
* @param string $name Controller name
* @return string Plural human name
*/
protected function _pluralHumanName($name) {
return Inflector::humanize(Inflector::underscore($name));
}

/**
* Find the correct path for a plugin. Scans $pluginPaths for the plugin you want.
*
* @param string $pluginName Name of the plugin you want ie. DebugKit
* @return string $path path to the correct plugin.
*/
protected function _pluginPath($pluginName) {
if (CakePlugin::loaded($pluginName)) {
return CakePlugin::path($pluginName);
}
return current(App::path('plugins')) . $pluginName . DS;
}

}
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