sintonia_webapp/app/Http/Controllers/PlaylistController.php

<?php

namespace App\Http\Controllers;

use App\Enums\PlaylistContentType;
use App\Models\File;
use App\Models\Playlist;
use App\Models\PlaylistContent;
use DateInterval;
use DateTime;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;

class PlaylistController extends Controller
{

    /**
     * List all playlists
     * @return string
     */
    public function index(Request $request) {
        if (!isset($request->per_page) || is_null($request)) {
            $pagination = 5;
        } else {
            $pagination = $request->per_page;
        }

        return Playlist::searchFilter($request)
            ->with('creator')
            ->orderBy('name')
            ->paginate($pagination)
            ->toJson();
    }

    /**
     * Save a playlist and its tracks list to the DB
     * @param Request $request
     * @return mixed
     * @throws \DateMalformedIntervalStringException
     */
    public function store(Request $request) {
        $user = Auth::user();
        $request->validate([
            'name' => 'required',
            'tracks' => 'required|array'
        ]);

        $totalLength = new DateTime('00:00:00');

        $dbPlaylist = Playlist::create([
            'name' => $request->get('name'),
            'creator_id' => $user->id,
            'description' => $request->description,
        ]);

        foreach($request->tracks as $file) {
            switch ($file['type']) {
                case 'audioclip':
                    $model = File::whereId($file['id'])->first();
                    break;
                case 'block':
                    //Todo: $model = Block::whereId($file['id'])->first();
                    break;
                case 'stream':
                    //Todo: $model = Stream::whereId($file['id'])->first();
                    break;
            }
            $totalLength->add(new DateInterval($model->length));
            PlaylistContent::create([
                'playlist_id' => $dbPlaylist->id,
                'file_id' => ($file['type'] === 'audioclip') ? $file['id'] : null,
                'block_id' => ($file['type'] === 'block') ? $file['id'] : null,
                'stream_id' => ($file['type'] === 'stream') ? $file['id'] : null,
                'type' => PlaylistContentType::fromName($file['type']),
                'position' => $file['position'],
                'trackoffset' => 0, //ToDo: understand this field
                'cliplength' => $model->length,
                'cuein' => ($model->cuein) ?? 0,
                'cueout' => ($model->cuein) ?? $model->length,
                'fadein' => 0,
                'fadeout' => 0,
            ]);
        }

        $dbPlaylist->update(['length' => $totalLength])->save();

        return $dbPlaylist->with('tracks')->toJson();
    }

    /**
     * Return a playlist with its tracks list
     * @param $id
     * @return mixed
     */
    public function show($id) {
        return Playlist::whereId($id)->with('tracks')->with('tracks.file')->first()->toJson();
    }

    /**
     * Update a playlist and its tracks list
     * @param Request $request
     * @param $id
     * @return mixed
     * @throws \DateMalformedIntervalStringException
     */
    public function update(Request $request, $id) {
        $user = Auth::user();
        $request->validate([
            'name' => 'required',
            'tracks' => 'required|array'
        ]);

        $totalLength = new DateTime('00:00:00');

        $playlist = Playlist::whereId($id)->first();
        $playlist->fill($request->all())->save();
        foreach ($request->tracks as $file) {
            $totalLength->add(new DateInterval($file['length']));
            switch ($file['type']) {
                case 'audioclip':
                    $model = File::whereId($file['id'])->first();
                    $data = [
                        'playlist_id' => $playlist->id,
                        'file_id' => $file['id'],
                    ];
                    break;
                case 'block':
                    //Todo: $model = Block::whereId($file['id'])->first();
                    $data = [
                        'playlist_id' => $playlist->id,
                        'block_id' => $file['id'],
                    ];
                    break;
                case 'stream':
                    //Todo: $model = Stream::whereId($file['id'])->first();
                    $data = [
                        'playlist_id' => $playlist->id,
                        'stream_id' => $file['id'],
                    ];
                    break;
            }
            PlaylistContent::updateOrCreate(
                $data,
                [
                    'type' => PlaylistContentType::fromName($file['type']),
                    'position' => $file['position'],
                    'trackoffset' => 0, //ToDo: understand this field
                    'cliplength' => $file['length'],
                    'cuein' => $file['cuein'],
                    'cueout' => $file['cueout'],
                    'fadein' => 0,
                    'fadeout' => 0,
                ]
            );
        }
        return $playlist->with('tracks')->toJson();
    }

    /**
     * Delete a playlist and its tracks list
     * @param $id
     * @return true
     */
    public function destroy($id) {
        PlaylistContent::where('playlist_id', $id)->delete();
        Playlist::destroy($id);
        return true;
    }
}