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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 * @param string $question The question to ask to the user
030 * @param array $choices The list of available choices
031 * @param mixed $default The default answer to return
032 */
033 public function __construct($question, array $choices, $default = null)
034 {
035 if (!$choices) {
036 throw new \LogicException('Choice question must have at least 1 choice available.');
037 }
038
039 parent::__construct($question, $default);
040
041 $this->choices = $choices;
042 $this->setValidator($this->getDefaultValidator());
043 $this->setAutocompleterValues($choices);
044 }
045
046 /**
047 * Returns available choices.
048 *
049 * @return array
050 */
051 public function getChoices()
052 {
053 return $this->choices;
054 }
055
056 /**
057 * Sets multiselect option.
058 *
059 * When multiselect is set to true, multiple choices can be answered.
060 *
061 * @param bool $multiselect
062 *
063 * @return $this
064 */
065 public function setMultiselect($multiselect)
066 {
067 $this->multiselect = $multiselect;
068 $this->setValidator($this->getDefaultValidator());
069
070 return $this;
071 }
072
073 /**
074 * Returns whether the choices are multiselect.
075 *
076 * @return bool
077 */
078 public function isMultiselect()
079 {
080 return $this->multiselect;
081 }
082
083 /**
084 * Gets the prompt for choices.
085 *
086 * @return string
087 */
088 public function getPrompt()
089 {
090 return $this->prompt;
091 }
092
093 /**
094 * Sets the prompt for choices.
095 *
096 * @param string $prompt
097 *
098 * @return $this
099 */
100 public function setPrompt($prompt)
101 {
102 $this->prompt = $prompt;
103
104 return $this;
105 }
106
107 /**
108 * Sets the error message for invalid values.
109 *
110 * The error message has a string placeholder (%s) for the invalid value.
111 *
112 * @param string $errorMessage
113 *
114 * @return $this
115 */
116 public function setErrorMessage($errorMessage)
117 {
118 $this->errorMessage = $errorMessage;
119 $this->setValidator($this->getDefaultValidator());
120
121 return $this;
122 }
123
124 /**
125 * Returns the default answer validator.
126 *
127 * @return callable
128 */
129 private function getDefaultValidator()
130 {
131 $choices = $this->choices;
132 $errorMessage = $this->errorMessage;
133 $multiselect = $this->multiselect;
134 $isAssoc = $this->isAssoc($choices);
135
136 return function ($selected) use ($choices, $errorMessage, $multiselect, $isAssoc) {
137 if ($multiselect) {
138 // Check for a separated comma values
139 if (!preg_match('/^[^,]+(?:,[^,]+)*$/', $selected, $matches)) {
140 throw new InvalidArgumentException(sprintf($errorMessage, $selected));
141 }
142
143 $selectedChoices = array_map('trim', explode(',', $selected));
144 } else {
145 $selectedChoices = [trim($selected)];
146 }
147
148 $multiselectChoices = [];
149 foreach ($selectedChoices as $value) {
150 $results = [];
151 foreach ($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