index.php

<?php
require_once('vendor/autoload.php');
session_start();

use Psr\Http\Message\ResponseInterface as Response;
use Psr\Http\Message\ServerRequestInterface as Request;
use Slim\Factory\AppFactory;
use Classes\SpotifyApi;
use Classes\BingRouteApi;

$dotenv = Dotenv\Dotenv::createUnsafeImmutable(__DIR__);
$dotenv->load();

$app = AppFactory::create();
$app->addErrorMiddleware(true, true, true);

//home
$app->get('/', function(Request $request, Response $response, $args){
   
    $response->getBody()->write(file_get_contents('views/inicio.html'));
    return $response;
});

//SpotifyAuthentication
$app->get('/auth', function(Request $request, Response $response, $args){
    
    $spotifyApi = new SpotifyApi();
    $url = $spotifyApi->RequestUrlAuth();

    sleep(1);
    $response->getBody()->write($url);
    return $response;
});

$app->get('/callback', function(Request $request, Response $response, $args){

    $spotifyApi = new SpotifyApi();
    $spotifyApi->RequestToken($_GET['code']);
    $spotifyApi->SaveSession();

    return $response->withHeader('Location', '/travel');
});

//travel
$app->get('/travel', function(Request $request, Response $response, $args){
    $response->getBody()->write(file_get_contents('views/rota-viagem.html'));
    return $response;
});

$app->post('/travel', function(Request $request, Response $response, $args){

    $start = $_POST['partida'];
    $end = $_POST['chegada'];

    $bingApi = new BingRouteApi($start, $end);
    $bingApi->SaveSession();

    sleep(1);
    return $response;
});

//playlist
$app->get('/create-playlist', function(Request $request, Response $response, $args){

    $bingApi = BingRouteApi::GetSaveSession();
    $spotifyApi = SpotifyApi::GetSaveSession();

    if(empty($bingApi) || empty($spotifyApi))
        return $response->withHeader('Location', '/');
    
    $tracks = $spotifyApi->getTracksSaved();
    $tracks = $tracks['body']['items'];
    shuffle($tracks);
    
    $duration_max = (int)$bingApi->TravelDuration;
    $sum = 0;
    $playlist_tripfy = [];
    
    foreach($tracks as $key => $value)
    {
        $track = [
            'id' => $value['track']['id'],
            'duration' => (int)$value['track']['duration_ms'] / 1000 
        ];
        $tracks[$key] = $track;
        $sum += (int)$track['duration'];
    }
    
    if($sum < $duration_max){
        throw new Excepcion();
        return $response;
    }
    
    $sum = 0;
    foreach($tracks as $value)
    {
        array_push($playlist_tripfy, $value);
        $sum += (int)$value['duration'];

        if($sum >= $duration_max)
            break;
    }

    if($sum > $duration_max)
    {
        $duration_end = (int)end($playlist_tripfy)['duration'];
        $diference = $duration_max - ($sum - $duration_end);
        
        foreach($tracks as $value)
        {
            $duration_value = (int)$value['duration'];
            if($duration_value == $diference || abs($diference - $duration_value) <= 60)
            {
                array_pop($playlist_tripfy);
                array_push($playlist_tripfy, $value);
                break;
            }
        }
    }

    $description = "Boa Viagem!";
    $idPlaylist = $spotifyApi->CreateNewPlaylist('Playlist-Tripfy', $description);
    $spotifyApi->AddTracksInPlaylists($idPlaylist['body']['id'], array_column($playlist_tripfy, 'id'));

    $response->getBody()->write($idPlaylist['body']['id']);
    return $response;
});

$app->run();

?>