55 lines
2 KiB
PHP
55 lines
2 KiB
PHP
<?php
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namespace App\Traits\Controllers;
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use App\Http\Requests\Bo\UpdateOrderRequest;
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use App\Interfaces\OrderableInterface;
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use Illuminate\Database\Eloquent\Model;
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use Illuminate\Http\RedirectResponse;
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use Illuminate\Support\Facades\DB;
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trait ManagesOrder
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{
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/**
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* Updates the order of a model and reorders all impacted elements.
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*
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* Shifts by +1 or -1 all elements located between the old
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* and new position of the model, then assigns the new position
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* to the target model. The whole operation runs inside a
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* database transaction to ensure data consistency.
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*
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* @param UpdateOrderRequest $request The validated request containing the 'priority' field.
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* @param Model&OrderableInterface $model The model to reorder (must use the Orderable trait).
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* @return RedirectResponse
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*
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* @throws \Throwable Returns if save fail.
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*/
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public function changeOrderPriority(UpdateOrderRequest $request, Model&OrderableInterface $model): RedirectResponse
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{
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$newPriority = (int) $request->validated('priority_order');
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return DB::transaction(function () use ($model, $newPriority): RedirectResponse {
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$query = $model::query()
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->whereKeyNot($model)
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->whereBetween('priority_order', [
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min($model->getPriorityOrder(), $newPriority),
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max($model->getPriorityOrder(), $newPriority),
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]);
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$groupField = $model->getOrderGroupField();
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if ($groupField) {
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$query->where($groupField, $model->{$groupField});
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}
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$model->getPriorityOrder() < $newPriority
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? $query->decrement('priority_order', 1)
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: $query->increment('priority_order', 1);
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$model->setAttribute('priority_order', $newPriority);
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$model->saveOrFail();
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return redirect()->back()->with('success', trans('crud.messages.order_changed'));
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});
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}
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}
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