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1 <?php
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2
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3 /*
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4 * This file is part of the Symfony package.
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5 *
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6 * (c) Fabien Potencier <fabien@symfony.com>
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7 *
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8 * For the full copyright and license information, please view the LICENSE
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9 * file that was distributed with this source code.
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10 */
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11
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12 namespace Symfony\Component\Console\Helper;
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13
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14 use Symfony\Component\Console\Exception\InvalidArgumentException;
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15 use Symfony\Component\Console\Exception\RuntimeException;
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16 use Symfony\Component\Console\Formatter\OutputFormatter;
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17 use Symfony\Component\Console\Formatter\OutputFormatterStyle;
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18 use Symfony\Component\Console\Input\InputInterface;
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19 use Symfony\Component\Console\Input\StreamableInputInterface;
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20 use Symfony\Component\Console\Output\ConsoleOutputInterface;
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21 use Symfony\Component\Console\Output\OutputInterface;
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22 use Symfony\Component\Console\Question\ChoiceQuestion;
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23 use Symfony\Component\Console\Question\Question;
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24
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25 /**
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26 * The QuestionHelper class provides helpers to interact with the user.
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27 *
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28 * @author Fabien Potencier <fabien@symfony.com>
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29 */
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30 class QuestionHelper extends Helper
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31 {
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32 private $inputStream;
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33 private static $shell;
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34 private static $stty;
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35
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36 /**
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37 * Asks a question to the user.
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38 *
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39 * @return mixed The user answer
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40 *
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41 * @throws RuntimeException If there is no data to read in the input stream
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42 */
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43 public function ask(InputInterface $input, OutputInterface $output, Question $question)
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44 {
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45 if ($output instanceof ConsoleOutputInterface) {
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46 $output = $output->getErrorOutput();
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47 }
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48
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49 if (!$input->isInteractive()) {
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50 $default = $question->getDefault();
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51
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52 if (null === $default) {
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53 return $default;
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54 }
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55
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56 if ($validator = $question->getValidator()) {
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57 return \call_user_func($question->getValidator(), $default);
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58 } elseif ($question instanceof ChoiceQuestion) {
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59 $choices = $question->getChoices();
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60
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61 if (!$question->isMultiselect()) {
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62 return isset($choices[$default]) ? $choices[$default] : $default;
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63 }
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64
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65 $default = explode(',', $default);
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66 foreach ($default as $k => $v) {
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67 $v = trim($v);
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68 $default[$k] = isset($choices[$v]) ? $choices[$v] : $v;
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69 }
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70 }
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71
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72 return $default;
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73 }
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74
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75 if ($input instanceof StreamableInputInterface && $stream = $input->getStream()) {
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76 $this->inputStream = $stream;
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77 }
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78
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79 if (!$question->getValidator()) {
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80 return $this->doAsk($output, $question);
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81 }
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82
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83 $interviewer = function () use ($output, $question) {
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84 return $this->doAsk($output, $question);
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85 };
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86
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87 return $this->validateAttempts($interviewer, $output, $question);
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88 }
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89
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90 /**
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91 * Sets the input stream to read from when interacting with the user.
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92 *
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93 * This is mainly useful for testing purpose.
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94 *
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95 * @deprecated since version 3.2, to be removed in 4.0. Use
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96 * StreamableInputInterface::setStream() instead.
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97 *
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98 * @param resource $stream The input stream
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99 *
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100 * @throws InvalidArgumentException In case the stream is not a resource
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101 */
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102 public function setInputStream($stream)
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103 {
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104 @trigger_error(sprintf('The %s() method is deprecated since Symfony 3.2 and will be removed in 4.0. Use %s::setStream() instead.', __METHOD__, StreamableInputInterface::class), E_USER_DEPRECATED);
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105
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106 if (!\is_resource($stream)) {
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107 throw new InvalidArgumentException('Input stream must be a valid resource.');
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108 }
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109
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110 $this->inputStream = $stream;
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111 }
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112
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113 /**
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114 * Returns the helper's input stream.
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115 *
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116 * @deprecated since version 3.2, to be removed in 4.0. Use
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117 * StreamableInputInterface::getStream() instead.
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118 *
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119 * @return resource
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120 */
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121 public function getInputStream()
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122 {
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123 if (0 === \func_num_args() || func_get_arg(0)) {
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124 @trigger_error(sprintf('The %s() method is deprecated since Symfony 3.2 and will be removed in 4.0. Use %s::getStream() instead.', __METHOD__, StreamableInputInterface::class), E_USER_DEPRECATED);
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125 }
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126
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127 return $this->inputStream;
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128 }
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129
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130 /**
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131 * {@inheritdoc}
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132 */
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133 public function getName()
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134 {
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135 return 'question';
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136 }
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137
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138 /**
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139 * Prevents usage of stty.
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140 */
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141 public static function disableStty()
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142 {
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143 self::$stty = false;
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144 }
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145
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146 /**
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147 * Asks the question to the user.
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148 *
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149 * @return bool|mixed|string|null
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150 *
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151 * @throws RuntimeException In case the fallback is deactivated and the response cannot be hidden
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152 */
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153 private function doAsk(OutputInterface $output, Question $question)
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154 {
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155 $this->writePrompt($output, $question);
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156
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157 $inputStream = $this->inputStream ?: STDIN;
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158 $autocomplete = $question->getAutocompleterValues();
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159
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160 if (null === $autocomplete || !$this->hasSttyAvailable()) {
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161 $ret = false;
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162 if ($question->isHidden()) {
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163 try {
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164 $ret = trim($this->getHiddenResponse($output, $inputStream));
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165 } catch (RuntimeException $e) {
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166 if (!$question->isHiddenFallback()) {
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167 throw $e;
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168 }
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169 }
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170 }
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171
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172 if (false === $ret) {
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173 $ret = fgets($inputStream, 4096);
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174 if (false === $ret) {
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175 throw new RuntimeException('Aborted.');
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176 }
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177 $ret = trim($ret);
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178 }
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179 } else {
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180 $ret = trim($this->autocomplete($output, $question, $inputStream, \is_array($autocomplete) ? $autocomplete : iterator_to_array($autocomplete, false)));
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181 }
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182
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183 $ret = \strlen($ret) > 0 ? $ret : $question->getDefault();
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184
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185 if ($normalizer = $question->getNormalizer()) {
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186 return $normalizer($ret);
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187 }
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188
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189 return $ret;
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190 }
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191
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192 /**
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193 * Outputs the question prompt.
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194 */
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195 protected function writePrompt(OutputInterface $output, Question $question)
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196 {
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197 $message = $question->getQuestion();
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198
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199 if ($question instanceof ChoiceQuestion) {
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200 $maxWidth = max(array_map([$this, 'strlen'], array_keys($question->getChoices())));
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201
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202 $messages = (array) $question->getQuestion();
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203 foreach ($question->getChoices() as $key => $value) {
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204 $width = $maxWidth - $this->strlen($key);
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205 $messages[] = ' [<info>'.$key.str_repeat(' ', $width).'</info>] '.$value;
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206 }
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207
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208 $output->writeln($messages);
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209
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210 $message = $question->getPrompt();
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211 }
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212
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213 $output->write($message);
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214 }
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215
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216 /**
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217 * Outputs an error message.
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218 */
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219 protected function writeError(OutputInterface $output, \Exception $error)
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220 {
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221 if (null !== $this->getHelperSet() && $this->getHelperSet()->has('formatter')) {
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222 $message = $this->getHelperSet()->get('formatter')->formatBlock($error->getMessage(), 'error');
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223 } else {
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224 $message = '<error>'.$error->getMessage().'</error>';
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225 }
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226
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227 $output->writeln($message);
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228 }
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229
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230 /**
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231 * Autocompletes a question.
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232 *
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233 * @param OutputInterface $output
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234 * @param Question $question
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235 * @param resource $inputStream
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236 * @param array $autocomplete
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237 *
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238 * @return string
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239 */
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240 private function autocomplete(OutputInterface $output, Question $question, $inputStream, array $autocomplete)
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241 {
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242 $ret = '';
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243
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244 $i = 0;
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245 $ofs = -1;
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246 $matches = $autocomplete;
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247 $numMatches = \count($matches);
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248
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249 $sttyMode = shell_exec('stty -g');
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250
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251 // Disable icanon (so we can fread each keypress) and echo (we'll do echoing here instead)
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252 shell_exec('stty -icanon -echo');
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253
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254 // Add highlighted text style
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255 $output->getFormatter()->setStyle('hl', new OutputFormatterStyle('black', 'white'));
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256
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257 // Read a keypress
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258 while (!feof($inputStream)) {
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259 $c = fread($inputStream, 1);
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260
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261 // as opposed to fgets(), fread() returns an empty string when the stream content is empty, not false.
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262 if (false === $c || ('' === $ret && '' === $c && null === $question->getDefault())) {
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263 shell_exec(sprintf('stty %s', $sttyMode));
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264 throw new RuntimeException('Aborted.');
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265 } elseif ("\177" === $c) { // Backspace Character
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266 if (0 === $numMatches && 0 !== $i) {
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267 --$i;
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268 // Move cursor backwards
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269 $output->write("\033[1D");
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270 }
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271
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272 if (0 === $i) {
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273 $ofs = -1;
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274 $matches = $autocomplete;
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275 $numMatches = \count($matches);
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276 } else {
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277 $numMatches = 0;
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278 }
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279
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280 // Pop the last character off the end of our string
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281 $ret = substr($ret, 0, $i);
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282 } elseif ("\033" === $c) {
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283 // Did we read an escape sequence?
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284 $c .= fread($inputStream, 2);
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285
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286 // A = Up Arrow. B = Down Arrow
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287 if (isset($c[2]) && ('A' === $c[2] || 'B' === $c[2])) {
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288 if ('A' === $c[2] && -1 === $ofs) {
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289 $ofs = 0;
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290 }
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291
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292 if (0 === $numMatches) {
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293 continue;
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294 }
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295
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296 $ofs += ('A' === $c[2]) ? -1 : 1;
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297 $ofs = ($numMatches + $ofs) % $numMatches;
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298 }
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299 } elseif (\ord($c) < 32) {
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300 if ("\t" === $c || "\n" === $c) {
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301 if ($numMatches > 0 && -1 !== $ofs) {
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302 $ret = $matches[$ofs];
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303 // Echo out remaining chars for current match
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304 $output->write(substr($ret, $i));
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305 $i = \strlen($ret);
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306 }
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307
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308 if ("\n" === $c) {
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309 $output->write($c);
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310 break;
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311 }
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312
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313 $numMatches = 0;
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314 }
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315
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316 continue;
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317 } else {
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318 if ("\x80" <= $c) {
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319 $c .= fread($inputStream, ["\xC0" => 1, "\xD0" => 1, "\xE0" => 2, "\xF0" => 3][$c & "\xF0"]);
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320 }
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321
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322 $output->write($c);
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323 $ret .= $c;
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324 ++$i;
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325
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326 $numMatches = 0;
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327 $ofs = 0;
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328
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329 foreach ($autocomplete as $value) {
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330 // If typed characters match the beginning chunk of value (e.g. [AcmeDe]moBundle)
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331 if (0 === strpos($value, $ret)) {
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332 $matches[$numMatches++] = $value;
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333 }
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334 }
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335 }
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336
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337 // Erase characters from cursor to end of line
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338 $output->write("\033[K");
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339
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340 if ($numMatches > 0 && -1 !== $ofs) {
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341 // Save cursor position
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342 $output->write("\0337");
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343 // Write highlighted text
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344 $output->write('<hl>'.OutputFormatter::escapeTrailingBackslash(substr($matches[$ofs], $i)).'</hl>');
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345 // Restore cursor position
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346 $output->write("\0338");
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347 }
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348 }
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349
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350 // Reset stty so it behaves normally again
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351 shell_exec(sprintf('stty %s', $sttyMode));
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352
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353 return $ret;
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354 }
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355
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356 /**
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357 * Gets a hidden response from user.
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358 *
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359 * @param OutputInterface $output An Output instance
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360 * @param resource $inputStream The handler resource
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361 *
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362 * @return string The answer
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363 *
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364 * @throws RuntimeException In case the fallback is deactivated and the response cannot be hidden
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365 */
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366 private function getHiddenResponse(OutputInterface $output, $inputStream)
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367 {
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368 if ('\\' === \DIRECTORY_SEPARATOR) {
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369 $exe = __DIR__.'/../Resources/bin/hiddeninput.exe';
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370
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371 // handle code running from a phar
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372 if ('phar:' === substr(__FILE__, 0, 5)) {
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373 $tmpExe = sys_get_temp_dir().'/hiddeninput.exe';
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374 copy($exe, $tmpExe);
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375 $exe = $tmpExe;
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376 }
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377
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378 $value = rtrim(shell_exec($exe));
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379 $output->writeln('');
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380
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381 if (isset($tmpExe)) {
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382 unlink($tmpExe);
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383 }
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384
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385 return $value;
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386 }
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387
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388 if ($this->hasSttyAvailable()) {
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389 $sttyMode = shell_exec('stty -g');
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390
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391 shell_exec('stty -echo');
|
Chris@0
|
392 $value = fgets($inputStream, 4096);
|
Chris@0
|
393 shell_exec(sprintf('stty %s', $sttyMode));
|
Chris@0
|
394
|
Chris@0
|
395 if (false === $value) {
|
Chris@18
|
396 throw new RuntimeException('Aborted.');
|
Chris@0
|
397 }
|
Chris@0
|
398
|
Chris@0
|
399 $value = trim($value);
|
Chris@0
|
400 $output->writeln('');
|
Chris@0
|
401
|
Chris@0
|
402 return $value;
|
Chris@0
|
403 }
|
Chris@0
|
404
|
Chris@0
|
405 if (false !== $shell = $this->getShell()) {
|
Chris@14
|
406 $readCmd = 'csh' === $shell ? 'set mypassword = $<' : 'read -r mypassword';
|
Chris@0
|
407 $command = sprintf("/usr/bin/env %s -c 'stty -echo; %s; stty echo; echo \$mypassword'", $shell, $readCmd);
|
Chris@0
|
408 $value = rtrim(shell_exec($command));
|
Chris@0
|
409 $output->writeln('');
|
Chris@0
|
410
|
Chris@0
|
411 return $value;
|
Chris@0
|
412 }
|
Chris@0
|
413
|
Chris@0
|
414 throw new RuntimeException('Unable to hide the response.');
|
Chris@0
|
415 }
|
Chris@0
|
416
|
Chris@0
|
417 /**
|
Chris@0
|
418 * Validates an attempt.
|
Chris@0
|
419 *
|
Chris@0
|
420 * @param callable $interviewer A callable that will ask for a question and return the result
|
Chris@0
|
421 * @param OutputInterface $output An Output instance
|
Chris@0
|
422 * @param Question $question A Question instance
|
Chris@0
|
423 *
|
Chris@0
|
424 * @return mixed The validated response
|
Chris@0
|
425 *
|
Chris@0
|
426 * @throws \Exception In case the max number of attempts has been reached and no valid response has been given
|
Chris@0
|
427 */
|
Chris@0
|
428 private function validateAttempts(callable $interviewer, OutputInterface $output, Question $question)
|
Chris@0
|
429 {
|
Chris@0
|
430 $error = null;
|
Chris@0
|
431 $attempts = $question->getMaxAttempts();
|
Chris@0
|
432 while (null === $attempts || $attempts--) {
|
Chris@0
|
433 if (null !== $error) {
|
Chris@0
|
434 $this->writeError($output, $error);
|
Chris@0
|
435 }
|
Chris@0
|
436
|
Chris@0
|
437 try {
|
Chris@17
|
438 return \call_user_func($question->getValidator(), $interviewer());
|
Chris@0
|
439 } catch (RuntimeException $e) {
|
Chris@0
|
440 throw $e;
|
Chris@0
|
441 } catch (\Exception $error) {
|
Chris@0
|
442 }
|
Chris@0
|
443 }
|
Chris@0
|
444
|
Chris@0
|
445 throw $error;
|
Chris@0
|
446 }
|
Chris@0
|
447
|
Chris@0
|
448 /**
|
Chris@0
|
449 * Returns a valid unix shell.
|
Chris@0
|
450 *
|
Chris@0
|
451 * @return string|bool The valid shell name, false in case no valid shell is found
|
Chris@0
|
452 */
|
Chris@0
|
453 private function getShell()
|
Chris@0
|
454 {
|
Chris@0
|
455 if (null !== self::$shell) {
|
Chris@0
|
456 return self::$shell;
|
Chris@0
|
457 }
|
Chris@0
|
458
|
Chris@0
|
459 self::$shell = false;
|
Chris@0
|
460
|
Chris@0
|
461 if (file_exists('/usr/bin/env')) {
|
Chris@0
|
462 // handle other OSs with bash/zsh/ksh/csh if available to hide the answer
|
Chris@0
|
463 $test = "/usr/bin/env %s -c 'echo OK' 2> /dev/null";
|
Chris@17
|
464 foreach (['bash', 'zsh', 'ksh', 'csh'] as $sh) {
|
Chris@0
|
465 if ('OK' === rtrim(shell_exec(sprintf($test, $sh)))) {
|
Chris@0
|
466 self::$shell = $sh;
|
Chris@0
|
467 break;
|
Chris@0
|
468 }
|
Chris@0
|
469 }
|
Chris@0
|
470 }
|
Chris@0
|
471
|
Chris@0
|
472 return self::$shell;
|
Chris@0
|
473 }
|
Chris@0
|
474
|
Chris@0
|
475 /**
|
Chris@0
|
476 * Returns whether Stty is available or not.
|
Chris@0
|
477 *
|
Chris@0
|
478 * @return bool
|
Chris@0
|
479 */
|
Chris@0
|
480 private function hasSttyAvailable()
|
Chris@0
|
481 {
|
Chris@0
|
482 if (null !== self::$stty) {
|
Chris@0
|
483 return self::$stty;
|
Chris@0
|
484 }
|
Chris@0
|
485
|
Chris@0
|
486 exec('stty 2>&1', $output, $exitcode);
|
Chris@0
|
487
|
Chris@14
|
488 return self::$stty = 0 === $exitcode;
|
Chris@0
|
489 }
|
Chris@0
|
490 }
|