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<?php |
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namespace AmaTeam\Image\Projection\Filesystem\Pattern; |
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/** |
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* TODO: implement proper tokenization/parsing mechanism |
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*/ |
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class Chunk |
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{ |
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const TYPE_EXACT_MATCH = 'exact'; |
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const TYPE_EXPRESSION = 'match'; |
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const PATTERN = '/\{([\w\-]+)\}/'; |
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/** |
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* Chunk type, one of Chunk::TYPE_* constants |
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* |
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* @var string |
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*/ |
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private $type; |
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/** |
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* Original chunk text value |
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* |
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* @var string |
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*/ |
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private $source; |
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/** |
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* Regular expression built to match the chunk |
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* |
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* @var string |
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*/ |
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private $expression; |
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/** |
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* List of parameters specified in chunk |
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* |
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* @var string[] |
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*/ |
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private $parameters = []; |
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public function __construct($chunk) |
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{ |
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$this->source = $chunk; |
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$this->expression = $chunk; |
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$this->type = self::TYPE_EXACT_MATCH; |
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$expression = preg_replace_callback(self::PATTERN, function ($match) { |
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$parameter = $match[1]; |
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if (in_array($parameter, $this->parameters)) { |
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return '(?:[\w\-]+)'; |
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} |
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$this->parameters[] = $parameter; |
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return sprintf('(?<%s>[\w\-]+)', $parameter); |
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}, $chunk); |
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if ($expression === $chunk) { |
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return; |
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} |
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$this->type = self::TYPE_EXPRESSION; |
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$this->expression = '/^' . $expression . '$/'; |
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} |
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/** |
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* @param string $segment |
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* @return bool |
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*/ |
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public function matches($segment) |
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{ |
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if ($this->type === self::TYPE_EXACT_MATCH) { |
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return $segment === $this->expression; |
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} |
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return !!preg_match($this->expression, $segment); |
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} |
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/** |
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* @param string $segment |
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* @return string[] |
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*/ |
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public function getParameters($segment) |
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{ |
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if ($this->type === self::TYPE_EXACT_MATCH) { |
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return []; |
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} |
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if (!preg_match($this->expression, $segment, $matches)) { |
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return []; |
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} |
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$target = []; |
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foreach ($this->parameters as $parameter) { |
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$target[$parameter] = $matches[$parameter]; |
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} |
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return $target; |
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} |
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/** |
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* @param array $parameters |
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* @return Chunk |
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*/ |
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public function resolve(array $parameters) |
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{ |
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$chunk = $this->source; |
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foreach ($parameters as $key => $value) { |
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$needle = "{{$key}}"; |
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if (strpos($chunk, $needle) !== false) { |
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$chunk = str_replace($needle, $value, $chunk); |
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} |
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} |
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return new Chunk($chunk); |
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} |
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/** |
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* @return string |
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*/ |
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public function getType() |
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{ |
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return $this->type; |
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} |
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/** |
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* @return string |
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*/ |
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public function getExpression() |
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{ |
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return $this->expression; |
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} |
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/** |
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* @return string |
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*/ |
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public function getSource() |
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{ |
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return $this->source; |
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} |
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/** |
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* @return string |
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*/ |
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public function __toString() |
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{ |
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return $this->source; |
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} |
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} |
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ama-team /
php-projection-framework
