ldc-doux/app/Http/Controllers/Bo/SlidesController.php

<?php

namespace App\Http\Controllers\Bo;

use App\Http\Controllers\Controller;
use App\Http\Requests\StoreSlideRequest;
use App\Models\Slide;
use App\Models\Slider;

class SlidesController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index()
    {
        $slides = Slide::orderBy('order', 'ASC')->get();

        return view('back.slides.index', compact('slides'));
    }

    /**
     * Show the form for creating a new resource.
     *
     * @param  Slide  $slide
     * @return \Illuminate\Http\Response
     */
    public function create(Slide $slide)
    {
        $sliders = Slider::all();
        return view('back.slides.create', compact('sliders', 'slide'));
    }

    /**
     * Store a newly created resource in storage.
     *
     * @param  \Illuminate\Http\StoreSlideRequest  $request
     * @return \Illuminate\Http\Response
     */
    public function store(StoreSlideRequest $request)
    {

        $slide = new Slide($request->validated());
        $slide->order = $this->getLastOrder();

        $slide->saveOrFail();

        return redirect()->route('bo.slides.edit', $slide->id)->with('success', 'Slide créé !');
    }

    /**
     * Display the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function show($id)
    {
        //
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  Slide  $slide
     * @return \Illuminate\Http\Response
     */
    public function edit(Slide $slide)
    {
        $sliders = Slider::all();

        return view('back.slides.edit', compact('slide', 'sliders'));
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\StoreSlideRequest  $request
     * @param  Slide  $slide
     * @return \Illuminate\Http\Response
     */
    public function update(StoreSlideRequest $request, Slide $slide)
    {
        $slide->fill($request->validated());

        if (!$slide->saveOrFail()) {
            return redirect()->route('bo.slides.edit', $slide->id)->with('error', trans('La modification a échoué'));
        }

        return redirect()->route('bo.slides.edit', $slide->id)->with('success', trans('Modifications enregistrées !'));
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  Slide  $slide
     * @return \Illuminate\Http\Response
     */
    public function destroy(Slide $slide)
    {
        if (!$slide->delete()) {
            return redirect()->route('bo.slides.index')->with('error', trans('La suppression a échoué'));
        }

        return redirect()->route('bo.slides.index')->with('success', trans('Suppression faite avec succès'));
    }


    public function changeOrder(Slide $slide, $action)
    {
        if ($action === 'up') {
            $tmp            = Slide::where('order', '<', $slide->order)->orderBy('order', 'DESC')->first();
            $newOrder       = $tmp->order;
            $tmp->order     = $slide->order;
            $slide->order = $newOrder;
        } else {
            $tmp            = Slide::where('order', '>', $slide->order)->orderBy('order', 'ASC')->first();
            $newOrder       = $tmp->order;
            $tmp->order     = $slide->order;
            $slide->order = $newOrder;
        }
        $tmp->save();
        $slide->save();

        return back();
    }

    /**
     * retreive order position to put a new slide to
     */
    private function getLastOrder()
    {
        $order = Slide::select('order')->orderBy('order', 'DESC')->first();
        if ($order === null) {
            return 1;
        }
        return $order->order + 1;
    }
}