lastfm: authentication

internal/backends/lastfm/lastfm.go

@@ -0,0 +1,54 @@
+/*
+Copyright © 2023 Philipp Wolfer <phw@uploadedlobster.com>
+
+Scotty is free software: you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the Free Software
+Foundation, either version 3 of the License, or (at your option) any later version.
+
+Scotty is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with
+Scotty. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+package lastfm
+
+import (
+	"net/url"
+
+	"github.com/shkh/lastfm-go/lastfm"
+	"github.com/spf13/viper"
+	"go.uploadedlobster.com/scotty/internal/auth"
+	"go.uploadedlobster.com/scotty/internal/models"
+	"golang.org/x/oauth2"
+)
+
+type LastfmApiBackend struct {
+	client *lastfm.Api
+}
+
+func (b *LastfmApiBackend) Name() string { return "lastfm" }
+
+func (b *LastfmApiBackend) FromConfig(config *viper.Viper) models.Backend {
+	clientId := config.GetString("client-id")
+	clientSecret := config.GetString("client-secret")
+	b.client = lastfm.New(clientId, clientSecret)
+	return b
+}
+
+func (b *LastfmApiBackend) OAuth2Strategy(redirectUrl *url.URL) auth.OAuth2Strategy {
+	return lastfmStrategy{
+		client:      b.client,
+		redirectUrl: redirectUrl,
+	}
+}
+
+func (b *LastfmApiBackend) OAuth2Setup(token oauth2.TokenSource) error {
+	t, err := token.Token()
+	if err != nil {
+		return err
+	}
+	return b.client.LoginWithToken(t.AccessToken)
+}