sintonia_webapp/app/Http/Controllers/PlaylistController.php

<?php

namespace App\Http\Controllers;

use App\Enums\PlaylistContentType;
use App\Helpers\LengthFormatter;
use App\Models\File;
use App\Models\Playlist;
use App\Models\PlaylistContent;
use App\Models\SmartBlock;
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($request)
            ->with(['creator', 'tracks.file', 'tracks.block', 'tracks.block.criteria', 'tracks.block.creator'])
            ->orderBy('name')
            ->paginate($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'
        ]);

        $length = 0;

        $dbPlaylist = Playlist::create([
            'name' => $request->get('name'),
            'creator_id' => $user->id,
            'description' => $request->description,
        ]);
//        dd($request->tracks);
        foreach($request->tracks as $key => $file) {
            if (!isset($file['id'])) {
                $file = $file['db_element'];
            }
            switch ($file['type']) {
                case 'audioclip':
                    $model = File::whereId($file['id'])->first();
                    break;
                case 'block':
                    $model = SmartBlock::whereId($file['id'])->first();
                    break;
                case 'stream':
                    //Todo: $model = Stream::whereId($file['id'])->first();
                    break;
            }
            $modelTime = new LengthFormatter($model->length);
            $modelCuein = new LengthFormatter($model->cuein);
            $modelCueout = new LengthFormatter($model->cueout);

            $length = $length + $modelTime->toSeconds();

            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' => $key,
                'trackoffset' => 0, //ToDo: understand this field
                'cliplength' => $modelTime->toSeconds(),
                'cuein' => $modelCuein->toSeconds() ?? 0,
                'cueout' => $modelCueout->toSeconds() ?? $modelTime->toSeconds(),
                'fadein' => '00:00:00',
                'fadeout' => '00:00:00',
            ]);
        }

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

        return $dbPlaylist->with('tracks')->get()->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'
        ]);

        $length = 0;

        $playlist = Playlist::whereId($id)->first();
        $playlist->fill($request->all())->save();
        foreach ($request->tracks as $key => $file) {
            switch ($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;
            }
            $modelTime = new LengthFormatter($model->length);
            $length = $length + $modelTime->toSeconds();
            PlaylistContent::updateOrCreate(
                $data,
                [
                    'type' => PlaylistContentType::fromName($file['type']),
                    'position' => $key,
                    'trackoffset' => 0, //ToDo: understand this field
                    'cliplength' => $model['length'],
                    'cuein' => $model['cuein'] ?? 0,
                    'cueout' => $model['cueout'] ?? 0,
                    'fadein' => '00:00:00',
                    'fadeout' => '00:00:00',
                ]
            );
        }
        $playlist->update(['length' => $length]);

        return $playlist->with('tracks')->get()->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;
    }
}