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|
<?php
declare(strict_types=1);
namespace TCB;
use TCB\TokenManager;
use TCB\HistoryStorage;
final class SpotifyApiClient
{
public function __construct(
private readonly TokenManager $tokenManager,
private readonly HistoryStorage $historyStorage,
) {}
public function pickRandomSongFromPlaylist(string $playlistName): array
{
echo "Picking a random song from the playlist $playlistName.\n";
if (
!array_key_exists($playlistName, $this->historyStorage->playlists)
|| $this->historyStorage->playlists[$playlistName] === ''
) {
$this->getPlaylistID($playlistName);
}
$items = $this->getPlaylistItems($this->historyStorage->playlists[$playlistName]);
if (!count($items)) {
echo "Playlist appears empty.\n";
exit(1);
}
$items = array_values(array_filter($items, function (array $item): bool {
return !array_key_exists($item['id'], $this->historyStorage->history);
}));
if (!count($items)) {
echo "No songs left to pick.\n";
exit(1);
}
$key = array_rand($items);
$song = $items[$key];
$this->historyStorage->saveSong($song);
return $song;
}
private function getPlaylistID(string $playlistName): void
{
echo "Looking up the Spotify playlist ID.\n";
$url = 'https://api.spotify.com/v1/me/playlists?limit=50';
$ch = curl_init();
while ($url !== null) {
curl_setopt_array($ch, [
CURLOPT_URL => $url,
CURLOPT_HTTPGET => true,
CURLOPT_HTTPHEADER => [
"Authorization: Bearer {$this->tokenManager->getAccessToken()}",
],
CURLOPT_RETURNTRANSFER => true,
]);
$response = curl_exec($ch);
$statusCode = curl_getinfo($ch, CURLINFO_RESPONSE_CODE);
if ($statusCode !== 200) {
echo "Non-200 response from Spotify: $statusCode $response\n";
exit(1);
}
$data = json_decode($response, true) ?? [];
foreach ($data['items'] ?? [] as $item) {
if ($item['name'] === $playlistName) {
$this->historyStorage->playlists[$playlistName] = $item['id'];
$this->historyStorage->save();
return;
}
}
$url = $data['next'] ?? null;
}
echo "Unable to find a playlist named $playlistName.\n";
exit(1);
}
private function getPlaylistItems(string $playlistID): array
{
$items = [];
$query = http_build_query([
'fields' => 'next,items(item(id,name,artists(name)))',
]);
$url = "https://api.spotify.com/v1/playlists/$playlistID/items?limit=50&$query";
$ch = curl_init();
while ($url !== null) {
curl_setopt_array($ch, [
CURLOPT_URL => $url,
CURLOPT_HTTPGET => true,
CURLOPT_HTTPHEADER => [
"Authorization: Bearer {$this->tokenManager->getAccessToken()}",
],
CURLOPT_RETURNTRANSFER => true,
]);
$response = curl_exec($ch);
$statusCode = curl_getinfo($ch, CURLINFO_RESPONSE_CODE);
if ($statusCode !== 200) {
echo "Non-200 response from Spotify: $statusCode $response\n";
exit(1);
}
$data = json_decode($response, true) ?? [];
foreach ($data['items'] ?? [] as $item) {
if (isset($item['item'])) {
$items[] = $item['item'];
}
}
$url = $data['next'] ?? null;
}
return $items;
}
}
|
