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<?php |
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namespace TheCodingMachine\Yaco\Definition; |
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use SuperClosure\Analyzer\TokenAnalyzer; |
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/** |
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* This class represents a closure. |
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* Important! The code of the closure will be COPIED, not referenced. |
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*/ |
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class ClosureDefinition implements DumpableInterface |
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{ |
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/** |
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* The identifier of the instance in the container. |
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* |
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* @var string |
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*/ |
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private $identifier; |
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/** |
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* The closure. |
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* |
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* @var \Closure |
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*/ |
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private $closure; |
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/** |
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* Constructs an instance definition. |
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* |
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* @param string|null $identifier The identifier of the entry in the container. Can be null if the entry is anonymous (declared inline in other instances) |
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* @param \Closure $closure The closure. It should not contain context (i.e. no "use" keyword in the closure definition). It should accept one compulsory parameter: the container. |
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*/ |
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public function __construct($identifier, \Closure $closure) |
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{ |
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$this->identifier = $identifier; |
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$this->closure = $closure; |
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} |
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/** |
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* Returns the identifier of the instance. |
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* |
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* @return string |
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*/ |
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public function getIdentifier() |
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{ |
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return $this->identifier; |
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} |
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/** |
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* Returns the closure of the parameter. |
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* |
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* @return mixed |
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*/ |
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public function getClosure() |
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{ |
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return $this->closure; |
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} |
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/** |
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* Returns an InlineEntryInterface object representing the PHP code necessary to generate |
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* the container entry. |
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* |
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* @param string $containerVariable The name of the variable that allows access to the container instance. For instance: "$container", or "$this->container" |
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* @param array $usedVariables An array of variables that are already used and that should not be used when generating this code. |
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* |
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* @return InlineEntryInterface |
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* |
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* @throws DefinitionException |
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*/ |
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public function toPhpCode($containerVariable, array $usedVariables = array()) |
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{ |
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// TODO: not optimal compared to previous interface!!! |
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$analyzer = new TokenAnalyzer(); |
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$analysis = $analyzer->analyze($this->closure); |
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if ($analysis['hasThis']) { |
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throw new DefinitionException('Your closure cannot call the $this keyword.'); |
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} |
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if (!empty($analysis['context'])) { |
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throw new DefinitionException('Your closure cannot have a context (i.e. cannot have a "use" keyword).'); |
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} |
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$code = $analysis['code']; |
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$variableName = VariableUtils::getNextAvailableVariableName("\$closure", $usedVariables); |
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$usedVariables[] = $variableName; |
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$assignClosure = sprintf('%s = %s;', $variableName, $code); |
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return new InlineEntry($variableName.'('.$containerVariable.')', $assignClosure, $usedVariables); |
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} |
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} |
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thecodingmachine /
yaco
