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Classes

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  1: <?php
  2: /**
  3:  * ConsoleOutput file.
  4:  *
  5:  * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
  6:  * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
  7:  *
  8:  * Licensed under The MIT License
  9:  * For full copyright and license information, please see the LICENSE.txt
 10:  * Redistributions of files must retain the above copyright notice.
 11:  *
 12:  * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 13:  * @link          http://cakephp.org CakePHP(tm) Project
 14:  * @since         CakePHP(tm) v 2.0
 15:  * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 16:  */
 17: 
 18: /**
 19:  * Object wrapper for outputting information from a shell application.
 20:  * Can be connected to any stream resource that can be used with fopen()
 21:  *
 22:  * Can generate colorized output on consoles that support it. There are a few
 23:  * built in styles
 24:  *
 25:  * - `error` Error messages.
 26:  * - `warning` Warning messages.
 27:  * - `info` Informational messages.
 28:  * - `comment` Additional text.
 29:  * - `question` Magenta text used for user prompts
 30:  *
 31:  * By defining styles with addStyle() you can create custom console styles.
 32:  *
 33:  * ### Using styles in output
 34:  *
 35:  * You can format console output using tags with the name of the style to apply. From inside a shell object
 36:  *
 37:  * `$this->out('<warning>Overwrite:</warning> foo.php was overwritten.');`
 38:  *
 39:  * This would create orange 'Overwrite:' text, while the rest of the text would remain the normal color.
 40:  * See ConsoleOutput::styles() to learn more about defining your own styles. Nested styles are not supported
 41:  * at this time.
 42:  *
 43:  * @package       Cake.Console
 44:  */
 45: class ConsoleOutput {
 46: 
 47: /**
 48:  * Raw output constant - no modification of output text.
 49:  *
 50:  * @var int
 51:  */
 52:     const RAW = 0;
 53: 
 54: /**
 55:  * Plain output - tags will be stripped.
 56:  *
 57:  * @var int
 58:  */
 59:     const PLAIN = 1;
 60: 
 61: /**
 62:  * Color output - Convert known tags in to ANSI color escape codes.
 63:  *
 64:  * @var int
 65:  */
 66:     const COLOR = 2;
 67: 
 68: /**
 69:  * Constant for a newline.
 70:  *
 71:  * @var string
 72:  */
 73:     const LF = PHP_EOL;
 74: 
 75: /**
 76:  * File handle for output.
 77:  *
 78:  * @var resource
 79:  */
 80:     protected $_output;
 81: 
 82: /**
 83:  * The current output type. Manipulated with ConsoleOutput::outputAs();
 84:  *
 85:  * @var int
 86:  */
 87:     protected $_outputAs = self::COLOR;
 88: 
 89: /**
 90:  * text colors used in colored output.
 91:  *
 92:  * @var array
 93:  */
 94:     protected static $_foregroundColors = array(
 95:         'black' => 30,
 96:         'red' => 31,
 97:         'green' => 32,
 98:         'yellow' => 33,
 99:         'blue' => 34,
100:         'magenta' => 35,
101:         'cyan' => 36,
102:         'white' => 37
103:     );
104: 
105: /**
106:  * background colors used in colored output.
107:  *
108:  * @var array
109:  */
110:     protected static $_backgroundColors = array(
111:         'black' => 40,
112:         'red' => 41,
113:         'green' => 42,
114:         'yellow' => 43,
115:         'blue' => 44,
116:         'magenta' => 45,
117:         'cyan' => 46,
118:         'white' => 47
119:     );
120: 
121: /**
122:  * formatting options for colored output
123:  *
124:  * @var string
125:  */
126:     protected static $_options = array(
127:         'bold' => 1,
128:         'underline' => 4,
129:         'blink' => 5,
130:         'reverse' => 7,
131:     );
132: 
133: /**
134:  * Styles that are available as tags in console output.
135:  * You can modify these styles with ConsoleOutput::styles()
136:  *
137:  * @var array
138:  */
139:     protected static $_styles = array(
140:         'emergency' => array('text' => 'red', 'underline' => true),
141:         'alert' => array('text' => 'red', 'underline' => true),
142:         'critical' => array('text' => 'red', 'underline' => true),
143:         'error' => array('text' => 'red', 'underline' => true),
144:         'warning' => array('text' => 'yellow'),
145:         'info' => array('text' => 'cyan'),
146:         'debug' => array('text' => 'yellow'),
147:         'success' => array('text' => 'green'),
148:         'comment' => array('text' => 'blue'),
149:         'question' => array('text' => 'magenta'),
150:         'notice' => array('text' => 'cyan')
151:     );
152: 
153: /**
154:  * Construct the output object.
155:  *
156:  * Checks for a pretty console environment. Ansicon allows pretty consoles
157:  * on Windows, and is supported.
158:  *
159:  * @param string $stream The identifier of the stream to write output to.
160:  */
161:     public function __construct($stream = 'php://stdout') {
162:         $this->_output = fopen($stream, 'w');
163: 
164:         if ((DS === '\\' && !(bool)env('ANSICON')) ||
165:             $stream === 'php://output' ||
166:             (function_exists('posix_isatty') && !posix_isatty($this->_output))
167:         ) {
168:             $this->_outputAs = self::PLAIN;
169:         }
170:     }
171: 
172: /**
173:  * Outputs a single or multiple messages to stdout. If no parameters
174:  * are passed, outputs just a newline.
175:  *
176:  * @param string|array $message A string or an array of strings to output
177:  * @param int $newlines Number of newlines to append
178:  * @return int Returns the number of bytes returned from writing to stdout.
179:  */
180:     public function write($message, $newlines = 1) {
181:         if (is_array($message)) {
182:             $message = implode(self::LF, $message);
183:         }
184:         return $this->_write($this->styleText($message . str_repeat(self::LF, $newlines)));
185:     }
186: 
187: /**
188:  * Apply styling to text.
189:  *
190:  * @param string $text Text with styling tags.
191:  * @return string String with color codes added.
192:  */
193:     public function styleText($text) {
194:         if ($this->_outputAs == self::RAW) {
195:             return $text;
196:         }
197:         if ($this->_outputAs == self::PLAIN) {
198:             $tags = implode('|', array_keys(self::$_styles));
199:             return preg_replace('#</?(?:' . $tags . ')>#', '', $text);
200:         }
201:         return preg_replace_callback(
202:             '/<(?P<tag>[a-z0-9-_]+)>(?P<text>.*?)<\/(\1)>/ims', array($this, '_replaceTags'), $text
203:         );
204:     }
205: 
206: /**
207:  * Replace tags with color codes.
208:  *
209:  * @param array $matches An array of matches to replace.
210:  * @return string
211:  */
212:     protected function _replaceTags($matches) {
213:         $style = $this->styles($matches['tag']);
214:         if (empty($style)) {
215:             return '<' . $matches['tag'] . '>' . $matches['text'] . '</' . $matches['tag'] . '>';
216:         }
217: 
218:         $styleInfo = array();
219:         if (!empty($style['text']) && isset(self::$_foregroundColors[$style['text']])) {
220:             $styleInfo[] = self::$_foregroundColors[$style['text']];
221:         }
222:         if (!empty($style['background']) && isset(self::$_backgroundColors[$style['background']])) {
223:             $styleInfo[] = self::$_backgroundColors[$style['background']];
224:         }
225:         unset($style['text'], $style['background']);
226:         foreach ($style as $option => $value) {
227:             if ($value) {
228:                 $styleInfo[] = self::$_options[$option];
229:             }
230:         }
231:         return "\033[" . implode($styleInfo, ';') . 'm' . $matches['text'] . "\033[0m";
232:     }
233: 
234: /**
235:  * Writes a message to the output stream.
236:  *
237:  * @param string $message Message to write.
238:  * @return bool success
239:  */
240:     protected function _write($message) {
241:         return fwrite($this->_output, $message);
242:     }
243: 
244: /**
245:  * Get the current styles offered, or append new ones in.
246:  *
247:  * ### Get a style definition
248:  *
249:  * `$this->output->styles('error');`
250:  *
251:  * ### Get all the style definitions
252:  *
253:  * `$this->output->styles();`
254:  *
255:  * ### Create or modify an existing style
256:  *
257:  * `$this->output->styles('annoy', array('text' => 'purple', 'background' => 'yellow', 'blink' => true));`
258:  *
259:  * ### Remove a style
260:  *
261:  * `$this->output->styles('annoy', false);`
262:  *
263:  * @param string $style The style to get or create.
264:  * @param array $definition The array definition of the style to change or create a style
265:  *   or false to remove a style.
266:  * @return mixed If you are getting styles, the style or null will be returned. If you are creating/modifying
267:  *   styles true will be returned.
268:  */
269:     public function styles($style = null, $definition = null) {
270:         if ($style === null && $definition === null) {
271:             return self::$_styles;
272:         }
273:         if (is_string($style) && $definition === null) {
274:             return isset(self::$_styles[$style]) ? self::$_styles[$style] : null;
275:         }
276:         if ($definition === false) {
277:             unset(self::$_styles[$style]);
278:             return true;
279:         }
280:         self::$_styles[$style] = $definition;
281:         return true;
282:     }
283: 
284: /**
285:  * Get/Set the output type to use. The output type how formatting tags are treated.
286:  *
287:  * @param int $type The output type to use. Should be one of the class constants.
288:  * @return mixed Either null or the value if getting.
289:  */
290:     public function outputAs($type = null) {
291:         if ($type === null) {
292:             return $this->_outputAs;
293:         }
294:         $this->_outputAs = $type;
295:     }
296: 
297: /**
298:  * Clean up and close handles
299:  */
300:     public function __destruct() {
301:         if (is_resource($this->_output)) {
302:             fclose($this->_output);
303:         }
304:     }
305: 
306: }
307: 
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