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<?php |
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namespace Dyrynda\Database\Support; |
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use Illuminate\Support\Str; |
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use Ramsey\Uuid\Uuid; |
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/** |
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* UUID generation trait. |
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* |
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* Include this trait in any Eloquent model where you wish to automatically set |
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* a UUID field. When saving, if the UUID field has not been set, generate a |
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* new UUID value, which will be set on the model and saved by Eloquent. |
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* |
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* @copyright 2017 Michael Dyrynda |
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* @author Michael Dyrynda <[email protected]> |
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* @license MIT |
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* |
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* @property string $uuidVersion |
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*/ |
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trait GeneratesUuid |
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{ |
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/** |
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* The UUID versions. |
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* |
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* @var array |
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*/ |
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protected $uuidVersions = [ |
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'uuid1', |
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'uuid3', |
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'uuid4', |
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'uuid5', |
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'ordered', |
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]; |
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/** |
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* Determine whether an attribute should be cast to a native type. |
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* |
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* @param string $key |
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* @param array|string|null $types |
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* @return bool |
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*/ |
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abstract public function hasCast($key, $types = null); |
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/** |
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* Boot the trait, adding a creating observer. |
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* |
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* When persisting a new model instance, we resolve the UUID field, then set |
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* a fresh UUID, taking into account if we need to cast to binary or not. |
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* |
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* @return void |
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*/ |
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public static function bootGeneratesUuid() |
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{ |
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static::creating(function ($model) { |
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/* @var \Illuminate\Database\Eloquent\Model|static $model */ |
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$uuid = $model->resolveUuid(); |
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if (isset($model->attributes[$model->uuidColumn()]) && ! is_null($model->attributes[$model->uuidColumn()])) { |
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/* @var \Ramsey\Uuid\Uuid $uuid */ |
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$uuid = $uuid->fromString(strtolower($model->attributes[$model->uuidColumn()])); |
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} |
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$model->attributes[$model->uuidColumn()] = $model->hasCast($model->uuidColumn(), 'uuid') ? $uuid->getBytes() : $uuid->toString(); |
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}); |
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} |
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/** |
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* The name of the column that should be used for the UUID. |
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* |
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* @return string |
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*/ |
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public function uuidColumn() |
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{ |
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return 'uuid'; |
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} |
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/** |
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* Resolve a UUID instance for the configured version. |
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* |
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* @return \Ramsey\Uuid\Uuid |
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*/ |
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public function resolveUuid() |
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{ |
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if (($version = $this->resolveUuidVersion()) == 'ordered') { |
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return Str::orderedUuid(); |
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} |
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return call_user_func([Uuid::class, $version]); |
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} |
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/** |
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* Resolve the UUID version to use when setting the UUID value. Default to uuid4. |
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* |
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* @return string |
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*/ |
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public function resolveUuidVersion() |
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{ |
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if (property_exists($this, 'uuidVersion') && in_array($this->uuidVersion, $this->uuidVersions)) { |
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return $this->uuidVersion; |
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} |
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return 'uuid4'; |
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} |
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/** |
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* Scope queries to find by UUID. |
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* |
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* @param \Illuminate\Database\Eloquent\Builder $query |
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* @param string $uuid |
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* |
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* @return \Illuminate\Database\Eloquent\Builder |
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*/ |
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public function scopeWhereUuid($query, $uuid) |
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{ |
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if ($this->hasCast($this->uuidColumn())) { |
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$uuid = $this->resolveUuid()->fromString($uuid)->getBytes(); |
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} |
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return $query->where($this->uuidColumn(), $uuid); |
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} |
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/** |
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* Cast an attribute to a native PHP type. |
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* |
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* @param string $key |
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* @param mixed $value |
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* @return mixed |
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*/ |
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protected function castAttribute($key, $value) |
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{ |
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if (is_null($value)) { |
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return parent::castAttribute($key, $value); |
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} |
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if ($key === $this->uuidColumn()) { |
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return $this->resolveUuid()->fromBytes($value)->toString(); |
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} |
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if ($this->hasCast($key, 'uuid') && $this->resolveUuidVersion() == 'ordered') { |
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return Uuid::fromBytes($value)->toString(); |
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} |
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} |
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/** |
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* Set an attribute value |
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* |
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* @param $key |
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* @param $value |
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* |
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* @return mixed |
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*/ |
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public function setAttribute($key, $value) |
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{ |
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if (trim($value) !== '' |
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&& $this->hasCast($key, 'uuid') |
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&& $this->resolveUuidVersion() == 'ordered' |
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) { |
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$value = Uuid::fromString($value)->getBytes(); |
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} |
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return parent::setAttribute($key, $value); |
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} |
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} |
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michaeldyrynda /
laravel-model-uuid
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