WIP: Authenticate

backends/auth.go

@@ -0,0 +1,60 @@
+/*
+Copyright © 2023 Philipp Wolfer <phw@uploadedlobster.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+package backends
+
+import (
+	"net/url"
+	"strings"
+
+	"github.com/spf13/viper"
+	"go.uploadedlobster.com/scotty/models"
+	"go.uploadedlobster.com/scotty/storage"
+)
+
+func BuildRedirectURL(config *viper.Viper, backend string) (*url.URL, error) {
+	callbackHost, _ := strings.CutSuffix(config.GetString("oauth-host"), "/")
+	if callbackHost == "" {
+		callbackHost = "127.0.0.1:2369"
+	}
+	callbackPath := "/callback/" + backend
+	return url.Parse("http://" + callbackHost + callbackPath)
+}
+
+func Authenticate(backend models.Backend, db storage.Database, config *viper.Viper) error {
+	authenticator, auth := backend.(models.OAuth2Authenticator)
+	if auth {
+		// FIXME
+		backendName := "spotify"
+		redirectURL, err := BuildRedirectURL(config, backendName)
+		if err != nil {
+			return err
+		}
+		// FIXME
+		token, err := db.GetOAuth2Token("spotify")
+		if err != nil {
+			return err
+		}
+		authenticator.OAuth2Setup(redirectURL.String(), token)
+	}
+	return nil
+}