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<?php
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namespace Illuminate\Database\Eloquent;
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use BadMethodCallException;
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use Illuminate\Database\Eloquent\Relations\HasMany;
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use Illuminate\Support\Str;
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class PendingHasThroughRelationship
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{
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/**
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* The root model that the relationship exists on.
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*
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* @var \Illuminate\Database\Eloquent\Model
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*/
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protected $rootModel;
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/**
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* The local relationship.
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*
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* @var \Illuminate\Database\Eloquent\Relations\HasMany|\Illuminate\Database\Eloquent\Relations\HasOne
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*/
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protected $localRelationship;
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/**
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* Create a pending has-many-through or has-one-through relationship.
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*
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* @param \Illuminate\Database\Eloquent\Model $rootModel
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* @param \Illuminate\Database\Eloquent\Relations\HasMany|\Illuminate\Database\Eloquent\Relations\HasOne $localRelationship
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*/
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public function __construct($rootModel, $localRelationship)
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{
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$this->rootModel = $rootModel;
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$this->localRelationship = $localRelationship;
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}
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/**
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* Define the distant relationship that this model has.
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*
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* @param string|(callable(\Illuminate\Database\Eloquent\Model): (\Illuminate\Database\Eloquent\Relations\HasOne|\Illuminate\Database\Eloquent\Relations\HasMany)) $callback
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* @return \Illuminate\Database\Eloquent\Relations\HasManyThrough|\Illuminate\Database\Eloquent\Relations\HasOneThrough
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*/
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public function has($callback)
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{
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if (is_string($callback)) {
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$callback = fn () => $this->localRelationship->getRelated()->{$callback}();
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}
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$distantRelation = $callback($this->localRelationship->getRelated());
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if ($distantRelation instanceof HasMany) {
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return $this->rootModel->hasManyThrough(
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$distantRelation->getRelated()::class,
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$this->localRelationship->getRelated()::class,
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$this->localRelationship->getForeignKeyName(),
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$distantRelation->getForeignKeyName(),
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$this->localRelationship->getLocalKeyName(),
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$distantRelation->getLocalKeyName(),
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);
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}
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return $this->rootModel->hasOneThrough(
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$distantRelation->getRelated()::class,
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$this->localRelationship->getRelated()::class,
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$this->localRelationship->getForeignKeyName(),
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$distantRelation->getForeignKeyName(),
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$this->localRelationship->getLocalKeyName(),
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$distantRelation->getLocalKeyName(),
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);
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}
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/**
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* Handle dynamic method calls into the model.
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*
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* @param string $method
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* @param array $parameters
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* @return mixed
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*/
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public function __call($method, $parameters)
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{
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if (Str::startsWith($method, 'has')) {
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return $this->has(Str::of($method)->after('has')->lcfirst()->toString());
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}
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throw new BadMethodCallException(sprintf(
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'Call to undefined method %s::%s()', static::class, $method
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));
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}
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}
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