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<?php |
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namespace BeyondCode\ErdGenerator; |
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use Illuminate\Database\Eloquent\Relations\BelongsTo; |
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use Illuminate\Database\Eloquent\Relations\HasOneOrMany; |
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use Illuminate\Database\Eloquent\Relations\Relation; |
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use Illuminate\Support\Collection; |
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use ReflectionClass; |
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use ReflectionMethod; |
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use Illuminate\Support\Arr; |
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class RelationFinder |
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{ |
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/** |
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* Return all relations from a fully qualified model class name. |
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* |
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* @param string $model |
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* @return Collection |
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* @throws \ReflectionException |
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*/ |
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public function getModelRelations(string $model) |
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{ |
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$class = new ReflectionClass($model); |
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$traitMethods = Collection::make($class->getTraits())->map(function (ReflectionClass $trait) { |
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return Collection::make($trait->getMethods(ReflectionMethod::IS_PUBLIC)); |
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})->flatten(); |
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$methods = Collection::make($class->getMethods(ReflectionMethod::IS_PUBLIC)) |
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->merge($traitMethods) |
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->reject(function (ReflectionMethod $method) use ($model) { |
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return $method->class !== $model || $method->getNumberOfParameters() > 0 || $method->isStatic();; |
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}); |
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$relations = Collection::make(); |
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$methods->map(function (ReflectionMethod $method) use ($model, &$relations) { |
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$relations = $relations->merge($this->getRelationshipFromMethodAndModel($method, $model)); |
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}); |
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$relations = $relations->filter(); |
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if ($ignoreRelations = Arr::get(config('erd-generator.ignore', []),$model)) |
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{ |
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$relations = $relations->diffKeys(array_flip($ignoreRelations)); |
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} |
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return $relations; |
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} |
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/** |
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* @param string $qualifiedKeyName |
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* @return mixed |
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*/ |
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protected function getParentKey(string $qualifiedKeyName) |
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{ |
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$segments = explode('.', $qualifiedKeyName); |
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return end($segments); |
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} |
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/** |
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* @param ReflectionMethod $method |
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* @param string $model |
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* @return array|null |
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*/ |
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protected function getRelationshipFromMethodAndModel(ReflectionMethod $method, string $model) |
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{ |
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try { |
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$return = $method->invoke(app($model)); |
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if ($return instanceof Relation) { |
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$localKey = null; |
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$foreignKey = null; |
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if ($return instanceof HasOneOrMany) { |
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$localKey = $this->getParentKey($return->getQualifiedParentKeyName()); |
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$foreignKey = $return->getForeignKeyName(); |
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} |
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if ($return instanceof BelongsTo) { |
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$foreignKey = $this->getParentKey($return->getQualifiedOwnerKeyName()); |
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$localKey = method_exists($return, 'getForeignKeyName') ? $return->getForeignKeyName() : $return->getForeignKey(); |
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} |
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return [ |
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$method->getName() => new ModelRelation( |
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$method->getShortName(), |
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(new ReflectionClass($return))->getShortName(), |
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(new ReflectionClass($return->getRelated()))->getName(), |
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$localKey, |
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$foreignKey |
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) |
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]; |
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} |
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} catch (\Throwable $e) {} |
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return null; |
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} |
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} |
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beyondcode /
laravel-er-diagram-generator
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