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<?php

/**

 * ConsoleOutput file.

 *

 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)

 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)

 *

 * Licensed under The MIT License

 * For full copyright and license information, please see the LICENSE.txt

 * Redistributions of files must retain the above copyright notice.

 *

 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)

 * @link          http://cakephp.org CakePHP(tm) Project

 * @since         CakePHP(tm) v 2.0

 * @license       http://www.opensource.org/licenses/mit-license.php MIT License

 */

/**

 * Object wrapper for outputting information from a shell application.

 * Can be connected to any stream resource that can be used with fopen()

 *

 * Can generate colorized output on consoles that support it. There are a few

 * built in styles

 *

 * - `error` Error messages.

 * - `warning` Warning messages.

 * - `info` Informational messages.

 * - `comment` Additional text.

 * - `question` Magenta text used for user prompts

 *

 * By defining styles with addStyle() you can create custom console styles.

 *

 * ### Using styles in output

 *

 * You can format console output using tags with the name of the style to apply. From inside a shell object

 *

 * `$this->out('<warning>Overwrite:</warning> foo.php was overwritten.');`

 *

 * This would create orange 'Overwrite:' text, while the rest of the text would remain the normal color.

 * See ConsoleOutput::styles() to learn more about defining your own styles. Nested styles are not supported

 * at this time.

 *

 * @package       Cake.Console

 */

class ConsoleOutput {

/**

 * Raw output constant - no modification of output text.

 *

 * @var int

 */

	const RAW = 0;

/**

 * Plain output - tags will be stripped.

 *

 * @var int

 */

	const PLAIN = 1;

/**

 * Color output - Convert known tags in to ANSI color escape codes.

 *

 * @var int

 */

	const COLOR = 2;

/**

 * Constant for a newline.

 *

 * @var string

 */

	const LF = PHP_EOL;

/**

 * File handle for output.

 *

 * @var resource

 */

	protected $_output;

/**

 * The current output type. Manipulated with ConsoleOutput::outputAs();

 *

 * @var int

 */

	protected $_outputAs = self::COLOR;

/**

 * text colors used in colored output.

 *

 * @var array

 */

	protected static $_foregroundColors = array(

		'black' => 30,

		'red' => 31,

		'green' => 32,

		'yellow' => 33,

		'blue' => 34,

		'magenta' => 35,

		'cyan' => 36,

		'white' => 37

	);

/**

 * background colors used in colored output.

 *

 * @var array

 */

	protected static $_backgroundColors = array(

		'black' => 40,

		'red' => 41,

		'green' => 42,

		'yellow' => 43,

		'blue' => 44,

		'magenta' => 45,

		'cyan' => 46,

		'white' => 47

	);

/**

 * formatting options for colored output

 *

 * @var string

 */

	protected static $_options = array(

		'bold' => 1,

		'underline' => 4,

		'blink' => 5,

		'reverse' => 7,

	);

/**

 * Styles that are available as tags in console output.

 * You can modify these styles with ConsoleOutput::styles()

 *

 * @var array

 */

	protected static $_styles = array(

		'emergency' => array('text' => 'red', 'underline' => true),

		'alert' => array('text' => 'red', 'underline' => true),

		'critical' => array('text' => 'red', 'underline' => true),

		'error' => array('text' => 'red', 'underline' => true),

		'warning' => array('text' => 'yellow'),

		'info' => array('text' => 'cyan'),

		'debug' => array('text' => 'yellow'),

		'success' => array('text' => 'green'),

		'comment' => array('text' => 'blue'),

		'question' => array('text' => 'magenta'),

		'notice' => array('text' => 'cyan')

	);

/**

 * Construct the output object.

 *

 * Checks for a pretty console environment. Ansicon and ConEmu allows

 * pretty consoles on Windows, and is supported.

 *

 * @param string $stream The identifier of the stream to write output to.

 */

	public function __construct($stream = 'php://stdout') {

		$this->_output = fopen($stream, 'w');

		if ((DS === '\\' && !(bool)env('ANSICON') && env('ConEmuANSI') !== 'ON') ||

			$stream === 'php://output' ||

			(function_exists('posix_isatty') && !posix_isatty($this->_output))

		) {

			$this->_outputAs = static::PLAIN;

		}

	}

/**

 * Outputs a single or multiple messages to stdout. If no parameters

 * are passed, outputs just a newline.

 *

 * @param string|array $message A string or an array of strings to output

 * @param int $newlines Number of newlines to append

 * @return int Returns the number of bytes returned from writing to stdout.

 */

	public function write($message, $newlines = 1) {

		if (is_array($message)) {

			$message = implode(static::LF, $message);

		}

		return $this->_write($this->styleText($message . str_repeat(static::LF, $newlines)));

	}

/**

 * Apply styling to text.

 *

 * @param string $text Text with styling tags.

 * @return string String with color codes added.

 */

	public function styleText($text) {

		if ($this->_outputAs == static::RAW) {

			return $text;

		}

		if ($this->_outputAs == static::PLAIN) {

			$tags = implode('|', array_keys(static::$_styles));

			return preg_replace('#</?(?:' . $tags . ')>#', '', $text);

		}

		return preg_replace_callback(

			'/<(?P<tag>[a-z0-9-_]+)>(?P<text>.*?)<\/(\1)>/ims', array($this, '_replaceTags'), $text

		);

	}

/**

 * Replace tags with color codes.

 *

 * @param array $matches An array of matches to replace.

 * @return string

 */

	protected function _replaceTags($matches) {

		$style = $this->styles($matches['tag']);

		if (empty($style)) {

			return '<' . $matches['tag'] . '>' . $matches['text'] . '</' . $matches['tag'] . '>';

		}

		$styleInfo = array();

		if (!empty($style['text']) && isset(static::$_foregroundColors[$style['text']])) {

			$styleInfo[] = static::$_foregroundColors[$style['text']];

		}

		if (!empty($style['background']) && isset(static::$_backgroundColors[$style['background']])) {

			$styleInfo[] = static::$_backgroundColors[$style['background']];

		}

		unset($style['text'], $style['background']);

		foreach ($style as $option => $value) {

			if ($value) {

				$styleInfo[] = static::$_options[$option];

			}

		}

		return "\033[" . implode($styleInfo, ';') . 'm' . $matches['text'] . "\033[0m";

	}

/**

 * Writes a message to the output stream.

 *

 * @param string $message Message to write.

 * @return bool success

 */

	protected function _write($message) {

		return fwrite($this->_output, $message);

	}

/**

 * Get the current styles offered, or append new ones in.

 *

 * ### Get a style definition

 *

 * `$this->output->styles('error');`

 *

 * ### Get all the style definitions

 *

 * `$this->output->styles();`

 *

 * ### Create or modify an existing style

 *

 * `$this->output->styles('annoy', array('text' => 'purple', 'background' => 'yellow', 'blink' => true));`

 *

 * ### Remove a style

 *

 * `$this->output->styles('annoy', false);`

 *

 * @param string $style The style to get or create.

 * @param array $definition The array definition of the style to change or create a style

 *   or false to remove a style.

 * @return mixed If you are getting styles, the style or null will be returned. If you are creating/modifying

 *   styles true will be returned.

 */

	public function styles($style = null, $definition = null) {

		if ($style === null && $definition === null) {

			return static::$_styles;

		}

		if (is_string($style) && $definition === null) {

			return isset(static::$_styles[$style]) ? static::$_styles[$style] : null;

		}

		if ($definition === false) {

			unset(static::$_styles[$style]);

			return true;

		}

		static::$_styles[$style] = $definition;

		return true;

	}

/**

 * Get/Set the output type to use. The output type how formatting tags are treated.

 *

 * @param int $type The output type to use. Should be one of the class constants.

 * @return mixed Either null or the value if getting.

 */

	public function outputAs($type = null) {

		if ($type === null) {

			return $this->_outputAs;

		}

		$this->_outputAs = $type;

	}

/**

 * Clean up and close handles

 */

	public function __destruct() {

		if (is_resource($this->_output)) {

			fclose($this->_output);

		}

	}

}