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<?php |
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namespace Squadron\Base\Models\Traits; |
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use ArrayAccess; |
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use InvalidArgumentException; |
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use Illuminate\Database\Eloquent\Builder; |
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use Illuminate\Database\Eloquent\SoftDeletingScope; |
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/** |
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* @property int $sortOrder |
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*/ |
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trait Sortable |
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{ |
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public static function bootSortable(): void |
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{ |
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static::creating(function ($model) { |
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$model->setHighestOrderNumber(); |
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}); |
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} |
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/** |
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* Let's be nice and provide an ordered scope. |
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* |
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* @param Builder $query |
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* @param string $direction |
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* |
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* @return Builder |
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*/ |
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public function scopeOrdered(Builder $query, string $direction = 'asc'): Builder |
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{ |
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return $query->orderBy($this->determineOrderColumnName(), $direction); |
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} |
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/** |
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* Modify the order column value. |
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*/ |
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public function setHighestOrderNumber(): void |
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{ |
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$orderColumnName = $this->determineOrderColumnName(); |
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$this->$orderColumnName = $this->getHighestOrderNumber() + 1; |
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} |
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/** |
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* Determine the order value for the new record. |
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*/ |
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public function getHighestOrderNumber(): int |
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{ |
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return (int) $this->buildSortQuery()->max($this->determineOrderColumnName()); |
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} |
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/** |
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* This function reorders the records: the record with the first id in the array |
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* will get order 1, the record with the second it will get order 2, ... |
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* |
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* A starting order number can be optionally supplied (defaults to 1). |
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* |
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* @param array|\ArrayAccess $ids |
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* @param int $startOrder |
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*/ |
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public static function setNewOrder($ids, int $startOrder = 1): void |
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{ |
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if (! \is_array($ids) && ! $ids instanceof ArrayAccess) |
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{ |
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throw new InvalidArgumentException('You must pass an array or ArrayAccess object to setNewOrder'); |
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} |
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$model = new static; |
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$orderColumnName = $model->determineOrderColumnName(); |
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$primaryKeyColumn = $model->getKeyName(); |
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foreach ($ids as $id) |
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{ |
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static::withoutGlobalScope(SoftDeletingScope::class) |
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->where($primaryKeyColumn, $id) |
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->update([$orderColumnName => $startOrder++]); |
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} |
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} |
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/** |
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* Swaps the order of this model with the model 'below' this model. |
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* |
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* @return $this |
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*/ |
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public function moveOrderDown(): self |
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{ |
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$orderColumnName = $this->determineOrderColumnName(); |
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$swapWithModel = $this->buildSortQuery()->limit(1)->ordered() |
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->where($orderColumnName, '>', $this->$orderColumnName) |
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->first(); |
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if (! $swapWithModel) |
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{ |
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return $this; |
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} |
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return $this->swapOrderWithModel($swapWithModel); |
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} |
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/** |
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* Swaps the order of this model with the model 'above' this model. |
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* |
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* @return $this |
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*/ |
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public function moveOrderUp(): self |
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{ |
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$orderColumnName = $this->determineOrderColumnName(); |
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$swapWithModel = $this->buildSortQuery()->limit(1) |
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->ordered('desc') |
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->where($orderColumnName, '<', $this->$orderColumnName) |
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->first(); |
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if (! $swapWithModel) |
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{ |
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return $this; |
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} |
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return $this->swapOrderWithModel($swapWithModel); |
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} |
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/** |
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* Swap the order of this model with the order of another model. |
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* |
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* @param $otherModel |
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* |
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* @return $this |
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*/ |
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public function swapOrderWithModel(Sortable $otherModel): self |
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{ |
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$orderColumnName = $this->determineOrderColumnName(); |
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$oldOrderOfOtherModel = $otherModel->$orderColumnName; |
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$otherModel->$orderColumnName = $this->$orderColumnName; |
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$otherModel->save(); |
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$this->$orderColumnName = $oldOrderOfOtherModel; |
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$this->save(); |
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return $this; |
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} |
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/** |
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* Swap the order of two models. |
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* |
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* @param $model |
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* @param $otherModel |
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*/ |
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public static function swapOrder($model, $otherModel): void |
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{ |
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$model->swapOrderWithModel($otherModel); |
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} |
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/** |
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* Moves this model to the first position. |
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* |
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* @return $this |
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*/ |
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public function moveToStart(): self |
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{ |
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$firstModel = $this->buildSortQuery()->limit(1) |
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->ordered() |
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->first(); |
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if ($firstModel->getKey() === $this->getKey()) |
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{ |
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return $this; |
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} |
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$orderColumnName = $this->determineOrderColumnName(); |
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$this->$orderColumnName = $firstModel->$orderColumnName; |
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$this->save(); |
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$this->buildSortQuery()->where($this->getKeyName(), '!=', $this->getKey())->increment($orderColumnName); |
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return $this; |
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} |
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/** |
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* Moves this model to the last position. |
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* |
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* @return $this |
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*/ |
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public function moveToEnd(): self |
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{ |
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$maxOrder = $this->getHighestOrderNumber(); |
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$orderColumnName = $this->determineOrderColumnName(); |
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if ($this->$orderColumnName === $maxOrder) |
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{ |
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return $this; |
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} |
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$oldOrder = $this->$orderColumnName; |
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$this->$orderColumnName = $maxOrder; |
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$this->save(); |
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$this->buildSortQuery()->where($this->getKeyName(), '!=', $this->getKey()) |
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->where($orderColumnName, '>', $oldOrder) |
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->decrement($orderColumnName); |
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return $this; |
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} |
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/** |
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* Determine the column name of the order column. |
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*/ |
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protected function determineOrderColumnName(): string |
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{ |
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return 'sortOrder'; |
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} |
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/** |
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* Determine the column name of the sorting key column (for filtering reasons). |
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*/ |
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protected function determineKeyColumnName(): string |
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{ |
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return null; |
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} |
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/** |
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* Build eloquent builder of sortable. |
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* |
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* @return Builder |
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*/ |
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public function buildSortQuery(): Builder |
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{ |
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$keyColumn = $this->determineKeyColumnName(); |
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return $keyColumn !== null |
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? static::query()->where($keyColumn, $this->$keyColumn) |
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: static::query(); |
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} |
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} |
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