mirror of
https://github.com/Luzifer/twitch-bot.git
synced 2024-09-20 10:32:55 +00:00
102 lines
3.2 KiB
Go
102 lines
3.2 KiB
Go
package spotify
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import (
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"context"
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"fmt"
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"net/http"
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"strings"
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"time"
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"github.com/Luzifer/twitch-bot/v3/internal/locker"
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"github.com/sirupsen/logrus"
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"golang.org/x/oauth2"
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)
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const expiryGrace = 10 * time.Second
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func getAuthorizedClient(channel, redirectURL string) (client *http.Client, err error) {
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// In templating functions are called multiple times at once which
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// with Spotify replacing the refresh-token on each renew would kill
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// the stored token when multiple spotify functions are called at
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// once. Therefore we do have this method locking itself until it
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// has successfully made one request to the users profile and therefore
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// renewed the token. The next request then will use the token the
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// previous request renewed.
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locker.LockByKey(strings.Join([]string{"spotify", "api-access", channel}, ":"))
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defer locker.UnlockByKey(strings.Join([]string{"spotify", "api-access", channel}, ":"))
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conf, err := oauthConfig(channel, redirectURL)
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if err != nil {
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return nil, fmt.Errorf("getting oauth config: %w", err)
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}
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var token *oauth2.Token
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if err = db.ReadEncryptedCoreMeta(strings.Join([]string{"spotify-auth", channel}, ":"), &token); err != nil {
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return nil, fmt.Errorf("loading oauth token: %w", err)
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}
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ts := conf.TokenSource(context.Background(), token)
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if token.Expiry.After(time.Now().Add(expiryGrace)) {
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// Token is still valid long enough, we spare the resources to do
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// the profile fetch and directly return the client with the token
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// as the scenario described here does not apply.
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return oauth2.NewClient(context.Background(), ts), nil
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}
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logrus.WithField("channel", channel).Debug("refreshing spotify token")
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ctx, cancel := context.WithTimeout(context.Background(), spotifyRequestTimeout)
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defer cancel()
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// We do a request to /me once to refresh the token if needed
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req, err := http.NewRequestWithContext(ctx, http.MethodGet, "https://api.spotify.com/v1/me", nil)
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if err != nil {
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return nil, fmt.Errorf("creating currently-playing request: %w", err)
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}
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oauthClient := oauth2.NewClient(context.Background(), ts)
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resp, err := oauthClient.Do(req)
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if err != nil {
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return nil, fmt.Errorf("executing request: %w", err)
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}
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defer func() {
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if err := resp.Body.Close(); err != nil {
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logrus.WithError(err).Error("closing Spotify response body (leaked fd)")
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}
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}()
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if resp.StatusCode != http.StatusOK {
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return nil, fmt.Errorf("requesting user profile: %w", err)
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}
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updToken, err := ts.Token()
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if err != nil {
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return nil, fmt.Errorf("getting updated token: %w", err)
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}
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if err := db.StoreEncryptedCoreMeta(strings.Join([]string{"spotify-auth", channel}, ":"), updToken); err != nil {
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logrus.WithError(err).Error("storing back Spotify auth token")
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}
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return oauthClient, nil
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}
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func oauthConfig(channel, redirectURL string) (conf *oauth2.Config, err error) {
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clientID, err := getModuleConfig(actorName, channel).String("clientId")
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if err != nil {
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return nil, fmt.Errorf("getting clientId for channel: %w", err)
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}
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return &oauth2.Config{
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ClientID: clientID,
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Endpoint: oauth2.Endpoint{
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AuthURL: "https://accounts.spotify.com/authorize",
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TokenURL: "https://accounts.spotify.com/api/token",
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},
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RedirectURL: redirectURL,
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Scopes: []string{"user-read-currently-playing"},
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}, nil
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}
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