Implemented subsonic loves import

backends/subsonic/subsonic.go

@@ -0,0 +1,91 @@
+/*
+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 subsonic
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/delucks/go-subsonic"
+	"github.com/spf13/viper"
+	"go.uploadedlobster.com/scotty/models"
+)
+
+type SubsonicApiBackend struct {
+	client   subsonic.Client
+	password string
+}
+
+func (b SubsonicApiBackend) FromConfig(config *viper.Viper) models.Backend {
+	b.client = subsonic.Client{
+		Client:     &http.Client{},
+		BaseUrl:    config.GetString("server-url"),
+		User:       config.GetString("username"),
+		ClientName: "Scotty",
+	}
+	b.password = config.GetString("token")
+	return b
+}
+
+func (b SubsonicApiBackend) ExportLoves(oldestTimestamp time.Time) ([]models.Love, error) {
+	err := b.client.Authenticate(b.password)
+	if err != nil {
+		return nil, err
+	}
+
+	result, err := b.client.GetStarred2(map[string]string{})
+	if err != nil {
+		return nil, err
+	}
+
+	loves := make([]models.Love, 0)
+out:
+	for _, song := range result.Song {
+		love := SongToLove(*song, b.client.User)
+		if love.Created.Unix() > oldestTimestamp.Unix() {
+			loves = append(loves, love)
+		} else {
+			break out
+		}
+	}
+
+	// TODO: Sort by creation date ascending
+	return loves, nil
+}
+
+func SongToLove(song subsonic.Child, username string) models.Love {
+	love := models.Love{
+		UserName: username,
+		Created:  song.Starred,
+		Track: models.Track{
+			TrackName:      song.Title,
+			ReleaseName:    song.Album,
+			ArtistNames:    []string{song.Artist},
+			TrackNumber:    song.Track,
+			Tags:           []string{song.Genre},
+			AdditionalInfo: map[string]any{},
+			Duration:       time.Duration(song.Duration * int(time.Second)),
+		},
+	}
+
+	return love
+}