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<?php |
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declare(strict_types=1); |
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namespace AlgoWeb\ODataMetadata; |
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use AlgoWeb\ODataMetadata\Exception\ArgumentException; |
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use ReflectionException; |
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use ReflectionFunction; |
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use ReflectionFunctionAbstract; |
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use ReflectionMethod; |
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use ReflectionNamedType; |
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abstract class Asserts |
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{ |
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private static function performAsserts(): bool |
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{ |
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return assert_options(ASSERT_ACTIVE) === 1; |
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} |
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public static function assertSignatureMatches(callable $expected, callable $actual, string $callablePropName): bool |
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{ |
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if (!self::performAsserts()) { |
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return true; |
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} |
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$expectedReflection = self::getReflection($expected); |
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$actualReflection = self::getReflection($actual); |
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$messageBuilder = function (string $messagePrefix = '') use ($callablePropName, $expectedReflection, $actualReflection): string { |
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return sprintf( |
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'%s%s should be a callable with signature %s, however callable with signature %s provided', |
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empty($messagePrefix) ? $messagePrefix : trim($messagePrefix) . ' ', |
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$callablePropName, |
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self::getSignatureFromReflection($expectedReflection), |
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self::getSignatureFromReflection($actualReflection) |
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); |
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}; |
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assert( |
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$expectedReflection->getNumberOfRequiredParameters() === $actualReflection->getNumberOfRequiredParameters(), |
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$messageBuilder('Incorrect Parameter Count') |
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); |
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if ($expectedReflection->hasReturnType()) { |
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assert( |
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$actualReflection->hasReturnType(), |
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$messageBuilder('Missing Return Type') |
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); |
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//TODO: improve this to check that the actual type does not return a childType; |
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$expectedReturnType = $expectedReflection->getReturnType(); |
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$actualReturnType = $actualReflection->getReturnType(); |
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$name = $expectedReturnType instanceof ReflectionNamedType ? |
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$expectedReturnType->getName() : |
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strval($expectedReturnType); |
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$actName = $actualReturnType instanceof ReflectionNamedType ? |
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$actualReturnType->getName() : |
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strval($actualReturnType); |
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assert( |
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$name === $actName, |
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$messageBuilder('IncorrectOrInvalid ReturnType') |
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); |
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if (!$expectedReturnType->allowsNull()) { |
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assert( |
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!$actualReturnType->allowsNull(), |
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$messageBuilder('Nullable ReturnType Not allowed') |
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); |
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} |
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} |
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for ($i = 0; $i < $expectedReflection->getNumberOfParameters(); $i++) { |
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$expectedParm = $expectedReflection->getParameters()[$i]; |
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if ($expectedParm->hasType()) { |
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$actualParm = $actualReflection->getParameters()[$i]; |
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assert( |
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$actualParm->hasType(), |
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$messageBuilder(sprintf('Parameter %s Is missing TypeHint', $i)) |
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); |
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$expectedParmType = $expectedParm->getType(); |
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$actualParmType = $actualParm->getType(); |
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$name = $expectedParmType instanceof ReflectionNamedType ? |
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$expectedParmType->getName() : |
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strval($expectedParmType); |
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$actName = $actualParmType instanceof ReflectionNamedType ? |
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$actualParmType->getName() : |
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strval($actualParmType); |
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//TODO: improve this to check that the actual type does not return a childType; |
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assert( |
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$name === $actName, |
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$messageBuilder(sprintf('Parameter %s has Incorrect Type', $i)) |
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); |
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if (!$expectedParm->allowsNull()) { |
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assert( |
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!$actualParm->allowsNull(), |
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$messageBuilder(sprintf('Parameter %s should disallow Nulls', $i)) |
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); |
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} |
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} |
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} |
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return true; |
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} |
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private static function getSignatureFromReflection(ReflectionFunctionAbstract $reflection): string |
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{ |
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$parameters = []; |
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foreach ($reflection->getParameters() as $parameter) { |
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$parameterString = ''; |
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if ($parameter->hasType()) { |
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$parmType = $parameter->getType(); |
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$parmName = $parmType instanceof ReflectionNamedType ? |
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$parmType->getName() : |
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strval($parmType); |
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$parameterString .= $parmType->allowsNull() ? '?' : ''; |
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$parameterString .= $parmName . ' '; |
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} |
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$parameterString .= $parameter->isVariadic() ? '...$' : '$'; |
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$parameterString .= $parameter->getName(); |
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if ($parameter->isOptional()) { |
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try { |
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$parameterString .= ' = ' . strval($parameter->getDefaultValue()); |
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} catch (ReflectionException $e) { |
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// Keep on trucking |
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} |
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} |
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$parameters[] = $parameterString; |
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} |
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$return = ''; |
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if ($reflection->hasReturnType()) { |
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$returnType = $reflection->getReturnType(); |
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$name = $returnType instanceof ReflectionNamedType ? |
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$returnType->getName() : |
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strval($returnType); |
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$return .= ': ' . $name; |
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} |
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return sprintf('function(%s)%s', implode(',', $parameters), $return); |
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} |
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private static function getReflection(callable $method): ReflectionFunctionAbstract |
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{ |
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try { |
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return is_array($method) ? new ReflectionMethod(...$method) : new ReflectionFunction($method); |
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} catch (ReflectionException $e) { |
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throw new ArgumentException($e->getMessage()); |
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} |
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} |
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} |
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