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<?php |
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/** |
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* @package s9e\TextFormatter |
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* @copyright Copyright (c) 2010-2017 The s9e Authors |
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License |
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*/ |
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namespace s9e\TextFormatter\Configurator\RendererGenerators\PHP; |
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class SwitchStatement |
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{ |
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/** |
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* @var array Dictionary of [value => php code] |
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*/ |
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protected $branchesCode; |
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/** |
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* @var string PHP code for the default case |
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*/ |
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protected $defaultCode; |
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/** |
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* @param array $branchesCode Dictionary of [value => php code] |
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* @param string $defaultCode PHP code for the default case |
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*/ |
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public function __construct(array $branchesCode, $defaultCode = '') |
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{ |
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ksort($branchesCode); |
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$this->branchesCode = $branchesCode; |
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$this->defaultCode = $defaultCode; |
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} |
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/** |
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* Create and return the source code for a switch statement |
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* |
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* @param string $expr Expression used for the switch clause |
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* @param array $branchesCode Dictionary of [value => php code] |
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* @param string $defaultCode PHP code for the default case |
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* @return string PHP code |
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*/ |
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public static function generate($expr, array $branchesCode, $defaultCode = '') |
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{ |
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$switch = new static($branchesCode, $defaultCode); |
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return $switch->getSource($expr); |
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} |
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/** |
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* Return the source code for this switch statement |
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* |
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* @param string $expr Expression used for the switch clause |
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* @return string PHP code |
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*/ |
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protected function getSource($expr) |
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{ |
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$php = 'switch(' . $expr . '){'; |
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foreach ($this->getValuesPerCodeBranch() as $branchCode => $values) |
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{ |
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foreach ($values as $value) |
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{ |
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$php .= 'case' . var_export((string) $value, true) . ':'; |
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} |
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$php .= $branchCode . 'break;'; |
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} |
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if ($this->defaultCode > '') |
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{ |
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$php .= 'default:' . $this->defaultCode; |
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} |
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$php = preg_replace('(break;$)', '', $php) . '}'; |
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return $php; |
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} |
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/** |
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* Group branches by their content and return the switch values for each branch |
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* |
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* @return array |
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*/ |
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protected function getValuesPerCodeBranch() |
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{ |
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$values = []; |
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foreach ($this->branchesCode as $value => $branchCode) |
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{ |
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$values[$branchCode][] = $value; |
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} |
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return $values; |
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} |
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} |
s9e /
TextFormatter
