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<?php |
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namespace AlgoWeb\PODataLaravel\Controllers; |
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use Illuminate\Routing\Controller; |
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trait MetadataControllerTrait |
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{ |
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/* |
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* Allowed crud verbs |
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*/ |
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protected $crudVerbs = ['create', 'read', 'update', 'delete']; |
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/* |
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* Array to record mapping betweeen model-verb combos and names |
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* First-level key is fully-qualified model name |
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* (eg Alt\Swedish\Chef\Bork\Bork\Bork) |
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* Second-level key is CRUD verb |
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*/ |
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protected $mapping; |
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/* |
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* Given model and verb, get method name and parameter list |
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* |
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* @param $modelName |
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* @param $crudVerb |
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* @return array |
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* @throws \Exception |
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*/ |
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public function getMethodName($modelName, $crudVerb) |
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{ |
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// enforce we're actually hooked up to a controller |
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assert($this instanceof Controller, get_class($this)); |
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// enforce that mapping is actually not empty |
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assert(0 < count($this->mapping), "Mapping array must not be empty"); |
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if (!array_key_exists($modelName, $this->mapping)) { |
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throw new \Exception('Metadata mapping for model '.$modelName.' not defined'); |
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} |
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View Code Duplication |
if (!in_array(strtolower($crudVerb), $this->crudVerbs)) { |
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throw new \Exception('CRUD verb '.$crudVerb.' not defined'); |
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} |
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$lookup = $this->mapping[$modelName]; |
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if (!is_array($lookup)) { |
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throw new \Exception('Metadata mapping for model '.$modelName.' not an array'); |
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} |
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if (!array_key_exists($crudVerb, $lookup)) { |
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throw new \Exception('Metadata mapping for CRUD verb '. $crudVerb.' on model '.$modelName.' not defined'); |
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} |
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$result = $lookup[$crudVerb]; |
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if (!isset($result)) { |
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throw new \Exception('Metadata mapping for CRUD verb '. $crudVerb.' on model '.$modelName.' null'); |
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} |
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if (!method_exists($this, $result)) { |
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throw new \Exception( |
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'Metadata target for CRUD verb '. $crudVerb.' on model '.$modelName.' does not exist' |
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); |
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} |
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$parmArray = $this->getParameterNames($result); |
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return [$result, $parmArray]; |
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} |
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public function getMappings() |
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{ |
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// enforce we're actually hooked up to a controller |
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assert($this instanceof Controller, get_class($this)); |
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// enforce that mapping is actually not empty |
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assert(0 < count($this->mapping), "Mapping array must not be empty"); |
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$allMappings = []; |
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// check that mapping array is well formed and sane, rather than waiting to stab us with a spatula |
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foreach ($this->mapping as $key => $map) { |
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if (!is_array($map)) { |
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throw new \Exception('Metadata mapping for model '.$key.' not an array'); |
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} |
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foreach ($map as $verb => $method) { |
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View Code Duplication |
if (!in_array(strtolower($verb), $this->crudVerbs)) { |
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throw new \Exception('CRUD verb '.$verb.' not defined'); |
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} |
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if (!isset($method)) { |
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throw new \Exception('Metadata mapping for CRUD verb '. $verb.' on model '.$key.' null'); |
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} |
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if (!method_exists($this, $method)) { |
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throw new \Exception( |
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'Metadata target for CRUD verb '. $verb.' on model '.$key.' does not exist' |
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); |
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} |
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$parmArray = $this->getParameterNames($method); |
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if (!array_key_exists($key, $allMappings)) { |
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$allMappings[$key] = []; |
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} |
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$allMappings[$key][$verb] = [ $method, $parmArray]; |
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} |
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} |
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return $allMappings; |
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} |
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/** |
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* @param $result |
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* @return array |
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*/ |
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protected function getParameterNames($result) |
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{ |
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$parmArray = []; |
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$r = new \ReflectionMethod($this, $result); |
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$params = $r->getParameters(); |
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foreach ($params as $parm) { |
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$detail = []; |
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$detail['class'] = get_class($this); |
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$detail['name'] = $parm->getName(); |
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if (null != $parm->getClass()) { |
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$detail['type'] = $parm->getClass()->name; |
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} |
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$parmArray[] = $detail; |
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} |
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return $parmArray; |
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} |
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} |
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Algo-Web /
POData-Laravel
Loading history...
Let’s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let’s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: