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<?php |
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namespace AlgoWeb\PODataLaravel\Models; |
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use Illuminate\Database\Eloquent\Model; |
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class MetadataRelationHolder |
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{ |
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protected $multConstraints = [ '0..1' => ['1'], '1' => ['0..1', '*'], '*' => ['1', '*']]; |
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protected $relations = []; |
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public function __construct() |
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{ |
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} |
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/** |
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* Add model's relationships to holder |
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* |
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* @param Model $model |
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*/ |
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public function addModel(Model $model) |
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{ |
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if (!in_array('AlgoWeb\\PODataLaravel\\Models\\MetadataTrait', class_uses($model))) { |
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$msg = 'Supplied model does not use MetadataTrait'; |
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throw new \InvalidArgumentException($msg); |
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} |
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$className = get_class($model); |
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if (array_key_exists($className, $this->relations)) { |
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$msg = $className.' already added'; |
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throw new \InvalidArgumentException($msg); |
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} |
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$this->relations[$className] = $model->getRelationships(); |
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} |
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public function getRelationsByKey($className, $keyName) |
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{ |
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$this->checkClassExists($className); |
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$rels = $this->relations[$className]; |
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if (!array_key_exists($keyName, $rels)) { |
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$msg = 'Key ' . $keyName . ' not registered on ' . $className; |
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throw new \InvalidArgumentException($msg); |
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} |
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$result = []; |
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$payload = $rels[$keyName]; |
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$principalType = $className; |
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foreach ($payload as $dependentType => $targDeets) { |
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if (!array_key_exists($dependentType, $this->relations)) { |
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continue; |
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} |
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// if principal and ostensible dependent type are equal, drop through to specific handler |
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// at moment, this is only for morphTo relations - morphedByMany doesn't cause this |
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if ($principalType === $dependentType) { |
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$morphToLines = $this->getMorphToRelations($principalType, $targDeets, $keyName); |
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foreach ($morphToLines as $morph) { |
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if (!in_array($morph, $result)) { |
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$result[] = $morph; |
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} |
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} |
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continue; |
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} |
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$foreign = $this->relations[$dependentType]; |
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foreach ($targDeets as $principalProperty => $rawDeets) { |
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$targKey = $rawDeets['local']; |
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$principalMult = $rawDeets['multiplicity']; |
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$principalProperty = $rawDeets['property']; |
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if (!array_key_exists($targKey, $foreign)) { |
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continue; |
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} |
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$foreignDeets = $foreign[$targKey]; |
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foreach ($foreignDeets as $foreignType => $raw) { |
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if (!array_key_exists($foreignType, $this->relations)) { |
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continue; |
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} |
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View Code Duplication |
foreach ($raw as $dependentProperty => $dependentPayload) { |
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if ($keyName == $dependentPayload['local']) { |
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$dependentMult = $dependentPayload['multiplicity']; |
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// generate forward and reverse relations |
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list($forward, $reverse) = $this->calculateRoundTripRelationsGenForwardReverse( |
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$principalType, |
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$principalMult, |
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$principalProperty, |
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$dependentType, |
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$dependentMult, |
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$dependentProperty |
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); |
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if (!in_array($forward, $result)) { |
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// add forward relation |
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$result[] = $forward; |
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} |
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if (!in_array($reverse, $result)) { |
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// add reverse relation |
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$result[] = $reverse; |
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} |
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} |
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} |
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} |
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} |
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} |
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return $result; |
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} |
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public function getRelationsByClass($className) |
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{ |
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$this->checkClassExists($className); |
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$rels = $this->relations[$className]; |
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$keys = array_keys($rels); |
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$results = []; |
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foreach ($keys as $key) { |
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$lines = $this->getRelationsByKey($className, $key); |
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foreach ($lines as $line) { |
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if (!in_array($line, $results)) { |
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$results[] = $line; |
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} |
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} |
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} |
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return $results; |
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} |
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private function getMorphToRelations($principalType, $targDeets, $keyName) |
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{ |
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$result = []; |
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$deetKeys = array_keys($targDeets); |
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$principalProperty = $deetKeys[0]; |
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$principalDeets = $targDeets[$principalProperty]; |
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$principalMult = $principalDeets['multiplicity']; |
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foreach ($this->relations as $dependentType => $dependentDeets) { |
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foreach ($dependentDeets as $targKey => $rawDeets) { |
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foreach ($rawDeets as $targType => $interDeets) { |
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if ($targType != $principalType) { |
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continue; |
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} |
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View Code Duplication |
foreach ($interDeets as $dependentProperty => $finalDeets) { |
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if ($keyName !== $finalDeets['local']) { |
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continue; |
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} |
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$dependentMult = $finalDeets['multiplicity']; |
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list($forward, $reverse) = $this->calculateRoundTripRelationsGenForwardReverse( |
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$principalType, |
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$principalMult, |
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$principalProperty, |
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$dependentType, |
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$dependentMult, |
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$dependentProperty |
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); |
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if (!in_array($forward, $result)) { |
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// add forward relation |
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$result[] = $forward; |
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} |
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if (!in_array($reverse, $result)) { |
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// add reverse relation |
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$result[] = $reverse; |
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} |
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} |
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} |
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} |
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} |
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return $result; |
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} |
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/** |
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* @param $principalType |
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* @param $principalMult |
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* @param $principalProperty |
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* @param $dependentType |
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* @param $dependentMult |
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* @param $dependentProperty |
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* @return array[] |
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*/ |
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private function calculateRoundTripRelationsGenForwardReverse( |
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$principalType, |
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$principalMult, |
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$principalProperty, |
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$dependentType, |
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$dependentMult, |
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$dependentProperty |
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) { |
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assert( |
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in_array($dependentMult, $this->multConstraints[$principalMult]), |
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'Cannot pair multiplicities ' . $dependentMult . ' and ' . $principalMult |
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); |
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assert( |
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in_array($principalMult, $this->multConstraints[$dependentMult]), |
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'Cannot pair multiplicities ' . $principalMult . ' and ' . $dependentMult |
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); |
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$forward = [ |
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'principalType' => $principalType, |
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'principalMult' => $dependentMult, |
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'principalProp' => $principalProperty, |
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'dependentType' => $dependentType, |
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'dependentMult' => $principalMult, |
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'dependentProp' => $dependentProperty |
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]; |
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$reverse = [ |
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'principalType' => $dependentType, |
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'principalMult' => $principalMult, |
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'principalProp' => $dependentProperty, |
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'dependentType' => $principalType, |
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'dependentMult' => $dependentMult, |
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'dependentProp' => $principalProperty |
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]; |
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return [$forward, $reverse]; |
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} |
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/** |
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* @param $className |
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*/ |
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protected function checkClassExists($className) |
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{ |
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if (!array_key_exists($className, $this->relations)) { |
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$msg = $className . ' does not exist in holder'; |
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throw new \InvalidArgumentException($msg); |
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} |
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} |
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/** |
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* Reset stored relations |
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*/ |
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public function reset() |
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{ |
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$this->relations = []; |
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} |
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} |
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Algo-Web /
POData-Laravel
Loading history...
Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.
You can also find more detailed suggestions in the “Code” section of your repository.