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<?php |
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namespace SleepingOwl\Admin\Traits; |
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use Illuminate\Database\Eloquent\Model; |
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use Illuminate\Database\Eloquent\Builder; |
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/** |
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* Trait OrderableModel. |
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* @method static $this orderModel() |
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* @method Builder findByPosition($position) |
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*/ |
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trait OrderableModel |
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{ |
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/** |
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* Boot trait. |
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*/ |
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protected static function bootOrderableModel() |
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{ |
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static::creating(function (Model $row) { |
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$row->updateOrderFieldOnCreate(); |
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}); |
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static::deleted(function (Model $row) { |
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$row->updateOrderFieldOnDelete(); |
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}); |
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if (in_array("Illuminate\Database\Eloquent\SoftDeletes", trait_uses_recursive(new static()))) { |
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static::restoring(function (Model $row) { |
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$row->updateOrderFieldOnRestore(); |
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}); |
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} |
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} |
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/** |
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* Get order value. |
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* @return int |
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*/ |
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public function getOrderValue() |
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{ |
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return $this->{$this->getOrderField()}; |
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} |
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/** |
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* Move model up. |
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*/ |
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public function moveUp() |
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{ |
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$this->move(1); |
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} |
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/** |
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* Move model down. |
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*/ |
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public function moveDown() |
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{ |
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$this->move(-1); |
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} |
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/** |
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* Move model in the $destination. |
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* |
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* @param $destination -1 (move down) or 1 (move up) |
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*/ |
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protected function move($destination) |
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{ |
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if ($previousRow = static::orderModel()->findByPosition($this->getOrderValue() - $destination)->first()) { |
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$previousRow->{$this->getOrderField()} += $destination; |
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$previousRow->save(); |
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} |
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$this->{$this->getOrderField()} -= $destination; |
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$this->save(); |
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} |
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/** |
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* Update order field on create. |
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*/ |
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protected function updateOrderFieldOnCreate() |
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{ |
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$this->{$this->getOrderField()} = static::orderModel()->count(); |
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} |
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/** |
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* Update order field on delete. |
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*/ |
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protected function updateOrderFieldOnDelete() |
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{ |
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static::orderModel() |
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->where($this->getOrderField(), '>', $this->getOrderValue()) |
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->decrement($this->getOrderField()); |
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} |
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/** |
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* Update order field on restore. |
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*/ |
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protected function updateOrderFieldOnRestore() |
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{ |
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static::orderModel() |
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->where($this->getOrderField(), '>', $this->getOrderValue()) |
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->increment($this->getOrderField()); |
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} |
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/** |
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* Order scope. |
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* |
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* @param $query |
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* |
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* @return mixed |
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*/ |
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public function scopeOrderModel($query) |
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{ |
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$parentFields = $this->getParentFieldName(); |
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if ($parentFields) { |
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$parentFields = (array) $parentFields; |
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foreach ($parentFields as $parentFieldName) { |
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$query->where($parentFieldName, $this->{$parentFieldName}); |
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} |
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} |
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return $query->orderBy($this->getOrderField(), 'ASC'); |
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} |
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/** |
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* @param Builder $query |
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* @param int $position |
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* |
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* @return mixed |
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*/ |
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public function scopeFindByPosition(Builder $query, $position) |
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{ |
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$query->where($this->getOrderField(), $position); |
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} |
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/** |
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* Get order field name. |
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* |
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* @return string |
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*/ |
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public function getOrderField() |
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{ |
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return $this->orderField ?: 'order'; |
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} |
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/** |
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* Get parent order field name. |
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* |
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* @return string |
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*/ |
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public function getParentFieldName() |
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{ |
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return $this->parentFieldName ?: null; |
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} |
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} |
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LaravelRUS /
SleepingOwlAdmin
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