koel/app/Services/LastfmService.php
2018-09-04 13:25:24 +07:00

326 lines
9.1 KiB
PHP

<?php
namespace App\Services;
use Exception;
class LastfmService extends ApiClient implements ApiConsumerInterface
{
/**
* Specify the response format, since Last.fm only returns XML.
*
* @var string
*/
protected $responseFormat = 'xml';
/**
* Override the key param, since, again, Lastfm wants to be different.
*
* @var string
*/
protected $keyParam = 'api_key';
/**
* Determine if our application is using Last.fm.
*/
public function used(): bool
{
return (bool) $this->getKey();
}
/**
* Determine if Last.fm integration is enabled.
*/
public function enabled(): bool
{
return $this->getKey() && $this->getSecret();
}
/**
* Get information about an artist.
*
* @param string $name Name of the artist
*
* @return mixed[]|null
*/
public function getArtistInformation(string $name): ?array
{
if (!$this->enabled()) {
return null;
}
$name = urlencode($name);
try {
return $this->cache->remember(md5("lastfm_artist_$name"), 24 * 60 * 7, function () use ($name): ?array {
$response = $this->get("?method=artist.getInfo&autocorrect=1&artist=$name");
if (!$response) {
return null;
}
$response = simplexml_load_string($response->asXML());
$response = json_decode(json_encode($response), true);
if (!$response || !$artist = array_get($response, 'artist')) {
return null;
}
return $this->buildArtistInformation($artist);
});
} catch (Exception $e) {
$this->logger->error($e);
return null;
}
}
/**
* Build a Koel-usable array of artist information using the data from Last.fm.
*
* @param mixed[] $artistData
*
* @return mixed[]
*/
private function buildArtistInformation(array $artistData): array
{
return [
'url' => array_get($artistData, 'url'),
'image' => count($artistData['image']) > 3 ? $artistData['image'][3] : $artistData['image'][0],
'bio' => [
'summary' => $this->formatText(array_get($artistData, 'bio.summary', '')),
'full' => $this->formatText(array_get($artistData, 'bio.content', '')),
],
];
}
/**
* Get information about an album.
*
* @return mixed[]|null
*/
public function getAlbumInformation(string $albumName, string $artistName): ?array
{
if (!$this->enabled()) {
return null;
}
$albumName = urlencode($albumName);
$artistName = urlencode($artistName);
try {
$cacheKey = md5("lastfm_album_{$albumName}_{$artistName}");
return $this->cache->remember($cacheKey, 24 * 60 * 7, function () use ($albumName, $artistName): ?array {
$response = $this->get("?method=album.getInfo&autocorrect=1&album=$albumName&artist=$artistName");
if (!$response) {
return null;
}
$response = simplexml_load_string($response->asXML());
$response = json_decode(json_encode($response), true);
if (!$response || !$album = array_get($response, 'album')) {
return null;
}
return $this->buildAlbumInformation($album);
});
} catch (Exception $e) {
$this->logger->error($e);
return null;
}
}
/**
* Build a Koel-usable array of album information using the data from Last.fm.
*
* @param mixed[] $albumData
*
* @return mixed[]
*/
private function buildAlbumInformation(array $albumData): array
{
return [
'url' => array_get($albumData, 'url'),
'image' => count($albumData['image']) > 3 ? $albumData['image'][3] : $albumData['image'][0],
'wiki' => [
'summary' => $this->formatText(array_get($albumData, 'wiki.summary', '')),
'full' => $this->formatText(array_get($albumData, 'wiki.content', '')),
],
'tracks' => array_map(function ($track) {
return [
'title' => $track['name'],
'length' => (int) $track['duration'],
'url' => $track['url'],
];
}, array_get($albumData, 'tracks.track', [])),
];
}
/**
* Get Last.fm's session key for the authenticated user using a token.
*
* @param string $token The token after successfully connecting to Last.fm
*
* @link http://www.last.fm/api/webauth#4
*/
public function getSessionKey(string $token): ?string
{
$query = $this->buildAuthCallParams([
'method' => 'auth.getSession',
'token' => $token,
], true);
try {
return (string) $this->get("/?$query", [], false)->session->key;
} catch (Exception $e) {
$this->logger->error($e);
return null;
}
}
/**
* Scrobble a song.
*
* @param string $artist The artist name
* @param string $track The track name
* @param string|int $timestamp The UNIX timestamp
* @param string $album The album name
* @param string $sk The session key
*/
public function scrobble(string $artist, string $track, $timestamp, string $album, string $sk): void
{
$params = compact('artist', 'track', 'timestamp', 'sk');
if ($album) {
$params['album'] = $album;
}
$params['method'] = 'track.scrobble';
try {
$this->post('/', $this->buildAuthCallParams($params), false);
} catch (Exception $e) {
$this->logger->error($e);
}
}
/**
* Love or unlove a track on Last.fm.
*
* @param string $track The track name
* @param string $artist The artist's name
* @param string $sk The session key
* @param bool $love Whether to love or unlove. Such cheesy terms... urrgggh
*/
public function toggleLoveTrack(string $track, string $artist, string $sk, ?bool $love = true): void
{
$params = compact('track', 'artist', 'sk');
$params['method'] = $love ? 'track.love' : 'track.unlove';
try {
$this->post('/', $this->buildAuthCallParams($params), false);
} catch (Exception $e) {
$this->logger->error($e);
}
}
/**
* Update a track's "now playing" on Last.fm.
*
* @param string $artist Name of the artist
* @param string $track Name of the track
* @param string $album Name of the album
* @param int|float $duration Duration of the track, in seconds
* @param string $sk The session key
*/
public function updateNowPlaying(string $artist, string $track, string $album, $duration, string $sk): void
{
$params = compact('artist', 'track', 'duration', 'sk');
$params['method'] = 'track.updateNowPlaying';
if ($album) {
$params['album'] = $album;
}
try {
$this->post('/', $this->buildAuthCallParams($params), false);
} catch (Exception $e) {
$this->logger->error($e);
}
}
/**
* Build the parameters to use for _authenticated_ Last.fm API calls.
* Such calls require:
* - The API key (api_key)
* - The API signature (api_sig).
*
* @link http://www.last.fm/api/webauth#5
*
* @param array $params The array of parameters.
* @param bool $toString Whether to turn the array into a query string
*
* @return array|string
*/
public function buildAuthCallParams(array $params, bool $toString = false)
{
$params['api_key'] = $this->getKey();
ksort($params);
// Generate the API signature.
// @link http://www.last.fm/api/webauth#6
$str = '';
foreach ($params as $name => $value) {
$str .= $name.$value;
}
$str .= $this->getSecret();
$params['api_sig'] = md5($str);
if (!$toString) {
return $params;
}
$query = '';
foreach ($params as $key => $value) {
$query .= "$key=$value&";
}
return rtrim($query, '&');
}
/**
* Correctly format a value returned by Last.fm.
*
* @param string|array $value
*/
protected function formatText($value): string
{
if (!$value) {
return '';
}
return trim(str_replace('Read more on Last.fm', '', nl2br(strip_tags(html_entity_decode($value)))));
}
public function getKey(): ?string
{
return config('koel.lastfm.key');
}
public function getEndpoint(): ?string
{
return config('koel.lastfm.endpoint');
}
public function getSecret(): ?string
{
return config('koel.lastfm.secret');
}
}