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- 06.01.2017
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ChoiceQuestion.php
001 <?php
002
003 /*
004 * This file is part of the Symfony package.
005 *
006 * (c) Fabien Potencier <fabien@symfony.com>
007 *
008 * For the full copyright and license information, please view the LICENSE
009 * file that was distributed with this source code.
010 */
011
012 namespace Symfony\Component\Console\Question;
013
014 use Symfony\Component\Console\Exception\InvalidArgumentException;
015
016 /**
017 * Represents a choice question.
018 *
019 * @author Fabien Potencier <fabien@symfony.com>
020 */
021 class ChoiceQuestion extends Question
022 {
023 private $choices;
024 private $multiselect = false;
025 private $prompt = ' > ';
026 private $errorMessage = 'Value "%s" is invalid';
027
028 /**
029 * Constructor.
030 *
031 * @param string $question The question to ask to the user
032 * @param array $choices The list of available choices
033 * @param mixed $default The default answer to return
034 */
035 public function __construct($question, array $choices, $default = null)
036 {
037 parent::__construct($question, $default);
038
039 $this->choices = $choices;
040 $this->setValidator($this->getDefaultValidator());
041 $this->setAutocompleterValues($choices);
042 }
043
044 /**
045 * Returns available choices.
046 *
047 * @return array
048 */
049 public function getChoices()
050 {
051 return $this->choices;
052 }
053
054 /**
055 * Sets multiselect option.
056 *
057 * When multiselect is set to true, multiple choices can be answered.
058 *
059 * @param bool $multiselect
060 *
061 * @return ChoiceQuestion The current instance
062 */
063 public function setMultiselect($multiselect)
064 {
065 $this->multiselect = $multiselect;
066 $this->setValidator($this->getDefaultValidator());
067
068 return $this;
069 }
070
071 /**
072 * Returns whether the choices are multiselect.
073 *
074 * @return bool
075 */
076 public function isMultiselect()
077 {
078 return $this->multiselect;
079 }
080
081 /**
082 * Gets the prompt for choices.
083 *
084 * @return string
085 */
086 public function getPrompt()
087 {
088 return $this->prompt;
089 }
090
091 /**
092 * Sets the prompt for choices.
093 *
094 * @param string $prompt
095 *
096 * @return ChoiceQuestion The current instance
097 */
098 public function setPrompt($prompt)
099 {
100 $this->prompt = $prompt;
101
102 return $this;
103 }
104
105 /**
106 * Sets the error message for invalid values.
107 *
108 * The error message has a string placeholder (%s) for the invalid value.
109 *
110 * @param string $errorMessage
111 *
112 * @return ChoiceQuestion The current instance
113 */
114 public function setErrorMessage($errorMessage)
115 {
116 $this->errorMessage = $errorMessage;
117 $this->setValidator($this->getDefaultValidator());
118
119 return $this;
120 }
121
122 /**
123 * Returns the default answer validator.
124 *
125 * @return callable
126 */
127 private function getDefaultValidator()
128 {
129 $choices = $this->choices;
130 $errorMessage = $this->errorMessage;
131 $multiselect = $this->multiselect;
132 $isAssoc = $this->isAssoc($choices);
133
134 return function ($selected) use ($choices, $errorMessage, $multiselect, $isAssoc) {
135 // Collapse all spaces.
136 $selectedChoices = str_replace(' ', '', $selected);
137
138 if ($multiselect) {
139 // Check for a separated comma values
140 if (!preg_match('/^[a-zA-Z0-9_-]+(?:,[a-zA-Z0-9_-]+)*$/', $selectedChoices, $matches)) {
141 throw new InvalidArgumentException(sprintf($errorMessage, $selected));
142 }
143 $selectedChoices = explode(',', $selectedChoices);
144 } else {
145 $selectedChoices = array($selected);
146 }
147
148 $multiselectChoices = array();
149 foreach ($selectedChoices as $value) {
150 $results = array();
151 foreach ($choices as $key => $choice) {
152 if ($choice === $value) {
153 $results[] = $key;
154 }
155 }
156
157 if (count($results) > 1) {
158 throw new InvalidArgumentException(sprintf('The provided answer is ambiguous. Value should be one of %s.', implode(' or ', $results)));
159 }
160
161 $result = array_search($value, $choices);
162
163 if (!$isAssoc) {
164 if (false !== $result) {
165 $result = $choices[$result];
166 } elseif (isset($choices[$value])) {
167 $result = $choices[$value];
168 }
169 } elseif (false === $result && isset($choices[$value])) {
170 $result = $value;
171 }
172
173 if (false === $result) {
174 throw new InvalidArgumentException(sprintf($errorMessage, $value));
175 }
176
177 $multiselectChoices[] = (string) $result;
178 }
179
180 if ($multiselect) {
181 return $multiselectChoices;
182 }
183
184 return current($multiselectChoices);
185 };
186 }
187 }
188