1: <?php
  2: /**
  3:  * HelpFormatter
  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:  * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 15:  */
 16: 
 17: App::uses('String', 'Utility');
 18: 
 19: /**
 20:  * HelpFormatter formats help for console shells. Can format to either
 21:  * text or XML formats. Uses ConsoleOptionParser methods to generate help.
 22:  *
 23:  * Generally not directly used. Using $parser->help($command, 'xml'); is usually
 24:  * how you would access help. Or via the `--help=xml` option on the command line.
 25:  *
 26:  * Xml output is useful for integration with other tools like IDE's or other build tools.
 27:  *
 28:  * @package       Cake.Console
 29:  * @since  CakePHP(tm) v 2.0
 30:  */
 31: class HelpFormatter {
 32: 
 33: /**
 34:  * The maximum number of arguments shown when generating usage.
 35:  *
 36:  * @var int
 37:  */
 38:     protected $_maxArgs = 6;
 39: 
 40: /**
 41:  * The maximum number of options shown when generating usage.
 42:  *
 43:  * @var int
 44:  */
 45:     protected $_maxOptions = 6;
 46: 
 47: /**
 48:  * Build the help formatter for an OptionParser
 49:  *
 50:  * @param ConsoleOptionParser $parser The option parser help is being generated for.
 51:  */
 52:     public function __construct(ConsoleOptionParser $parser) {
 53:         $this->_parser = $parser;
 54:     }
 55: 
 56: /**
 57:  * Get the help as formatted text suitable for output on the command line.
 58:  *
 59:  * @param int $width The width of the help output.
 60:  * @return string
 61:  */
 62:     public function text($width = 72) {
 63:         $parser = $this->_parser;
 64:         $out = array();
 65:         $description = $parser->description();
 66:         if (!empty($description)) {
 67:             $out[] = String::wrap($description, $width);
 68:             $out[] = '';
 69:         }
 70:         $out[] = __d('cake_console', '<info>Usage:</info>');
 71:         $out[] = $this->_generateUsage();
 72:         $out[] = '';
 73:         $subcommands = $parser->subcommands();
 74:         if (!empty($subcommands)) {
 75:             $out[] = __d('cake_console', '<info>Subcommands:</info>');
 76:             $out[] = '';
 77:             $max = $this->_getMaxLength($subcommands) + 2;
 78:             foreach ($subcommands as $command) {
 79:                 $out[] = String::wrap($command->help($max), array(
 80:                     'width' => $width,
 81:                     'indent' => str_repeat(' ', $max),
 82:                     'indentAt' => 1
 83:                 ));
 84:             }
 85:             $out[] = '';
 86:             $out[] = __d('cake_console', 'To see help on a subcommand use <info>`cake %s [subcommand] --help`</info>', $parser->command());
 87:             $out[] = '';
 88:         }
 89: 
 90:         $options = $parser->options();
 91:         if (!empty($options)) {
 92:             $max = $this->_getMaxLength($options) + 8;
 93:             $out[] = __d('cake_console', '<info>Options:</info>');
 94:             $out[] = '';
 95:             foreach ($options as $option) {
 96:                 $out[] = String::wrap($option->help($max), array(
 97:                     'width' => $width,
 98:                     'indent' => str_repeat(' ', $max),
 99:                     'indentAt' => 1
100:                 ));
101:             }
102:             $out[] = '';
103:         }
104: 
105:         $arguments = $parser->arguments();
106:         if (!empty($arguments)) {
107:             $max = $this->_getMaxLength($arguments) + 2;
108:             $out[] = __d('cake_console', '<info>Arguments:</info>');
109:             $out[] = '';
110:             foreach ($arguments as $argument) {
111:                 $out[] = String::wrap($argument->help($max), array(
112:                     'width' => $width,
113:                     'indent' => str_repeat(' ', $max),
114:                     'indentAt' => 1
115:                 ));
116:             }
117:             $out[] = '';
118:         }
119:         $epilog = $parser->epilog();
120:         if (!empty($epilog)) {
121:             $out[] = String::wrap($epilog, $width);
122:             $out[] = '';
123:         }
124:         return implode("\n", $out);
125:     }
126: 
127: /**
128:  * Generate the usage for a shell based on its arguments and options.
129:  * Usage strings favor short options over the long ones. and optional args will
130:  * be indicated with []
131:  *
132:  * @return string
133:  */
134:     protected function _generateUsage() {
135:         $usage = array('cake ' . $this->_parser->command());
136:         $subcommands = $this->_parser->subcommands();
137:         if (!empty($subcommands)) {
138:             $usage[] = '[subcommand]';
139:         }
140:         $options = array();
141:         foreach ($this->_parser->options() as $option) {
142:             $options[] = $option->usage();
143:         }
144:         if (count($options) > $this->_maxOptions) {
145:             $options = array('[options]');
146:         }
147:         $usage = array_merge($usage, $options);
148:         $args = array();
149:         foreach ($this->_parser->arguments() as $argument) {
150:             $args[] = $argument->usage();
151:         }
152:         if (count($args) > $this->_maxArgs) {
153:             $args = array('[arguments]');
154:         }
155:         $usage = array_merge($usage, $args);
156:         return implode(' ', $usage);
157:     }
158: 
159: /**
160:  * Iterate over a collection and find the longest named thing.
161:  *
162:  * @param array $collection The collection to find a max length of.
163:  * @return int
164:  */
165:     protected function _getMaxLength($collection) {
166:         $max = 0;
167:         foreach ($collection as $item) {
168:             $max = (strlen($item->name()) > $max) ? strlen($item->name()) : $max;
169:         }
170:         return $max;
171:     }
172: 
173: /**
174:  * Get the help as an xml string.
175:  *
176:  * @param bool $string Return the SimpleXml object or a string. Defaults to true.
177:  * @return string|SimpleXmlElement See $string
178:  */
179:     public function xml($string = true) {
180:         $parser = $this->_parser;
181:         $xml = new SimpleXmlElement('<shell></shell>');
182:         $xml->addChild('command', $parser->command());
183:         $xml->addChild('description', $parser->description());
184: 
185:         $xml->addChild('epilog', $parser->epilog());
186:         $subcommands = $xml->addChild('subcommands');
187:         foreach ($parser->subcommands() as $command) {
188:             $command->xml($subcommands);
189:         }
190:         $options = $xml->addChild('options');
191:         foreach ($parser->options() as $option) {
192:             $option->xml($options);
193:         }
194:         $arguments = $xml->addChild('arguments');
195:         foreach ($parser->arguments() as $argument) {
196:             $argument->xml($arguments);
197:         }
198:         return $string ? $xml->asXml() : $xml;
199:     }
200: 
201: }
202: