<?php /** * PHP Command Line Tools * * This source file is subject to the MIT license that is bundled * with this package in the file LICENSE. * * @author James Logsdon <dwarf@girsbrain.org> * @copyright 2010 James Logsdom (http://girsbrain.org) * @license http://www.opensource.org/licenses/mit-license.php The MIT License */ namespace cli\arguments; use cli\Arguments; /** * Arguments help screen renderer */ class HelpScreen { protected $_flags = array(); protected $_maxFlag = 0; protected $_options = array(); protected $_maxOption = 0; public function __construct(Arguments $arguments) { $this->setArguments($arguments); } public function __toString() { return $this->render(); } public function setArguments(Arguments $arguments) { $this->consumeArgumentFlags($arguments); $this->consumeArgumentOptions($arguments); } public function consumeArgumentFlags(Arguments $arguments) { $data = $this->_consume($arguments->getFlags()); $this->_flags = $data[0]; $this->_flagMax = $data[1]; } public function consumeArgumentOptions(Arguments $arguments) { $data = $this->_consume($arguments->getOptions()); $this->_options = $data[0]; $this->_optionMax = $data[1]; } public function render() { $help = array(); array_push($help, $this->_renderFlags()); array_push($help, $this->_renderOptions()); return join("\n\n", $help); } private function _renderFlags() { if (empty($this->_flags)) { return null; } return "Flags\n" . $this->_renderScreen($this->_flags, $this->_flagMax); } private function _renderOptions() { if (empty($this->_options)) { return null; } return "Options\n" . $this->_renderScreen($this->_options, $this->_optionMax); } private function _renderScreen($options, $max) { $help = array(); foreach ($options as $option => $settings) { $formatted = ' ' . str_pad($option, $max); $dlen = 80 - 4 - $max; $description = str_split($settings['description'], $dlen); $formatted.= ' ' . array_shift($description); if ($settings['default']) { $formatted .= ' [default: ' . $settings['default'] . ']'; } $pad = str_repeat(' ', $max + 3); while ($desc = array_shift($description)) { $formatted .= "\n{$pad}{$desc}"; } array_push($help, $formatted); } return join("\n", $help); } private function _consume($options) { $max = 0; $out = array(); foreach ($options as $option => $settings) { $names = array('--' . $option); foreach ($settings['aliases'] as $alias) { array_push($names, '-' . $alias); } $names = join(', ', $names); $max = max(strlen($names), $max); $out[$names] = $settings; } return array($out, $max); } }