Implemented Maloja listen export

backends/maloja.go

@@ -0,0 +1,97 @@
+/*
+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 (
+	"slices"
+	"strings"
+	"time"
+
+	"github.com/spf13/viper"
+	"go.uploadedlobster.com/scotty/backends/maloja"
+)
+
+type MalojaApiBackend struct {
+	client maloja.Client
+}
+
+func (b MalojaApiBackend) FromConfig(config *viper.Viper) Backend {
+	b.client = maloja.New(
+		config.GetString("server-url"),
+		config.GetString("token"),
+	)
+	return b
+}
+
+func (b MalojaApiBackend) ExportListens(oldestTimestamp time.Time) ([]Listen, error) {
+	page := 0
+	perPage := 1000
+
+	listens := make([]Listen, 0)
+
+out:
+	for {
+		result, err := b.client.GetListens(page, perPage)
+		if err != nil {
+			return nil, err
+		}
+
+		count := len(result.Listens)
+		if count == 0 {
+			break
+		}
+
+		for _, listen := range result.Listens {
+			if listen.ListenedAt > oldestTimestamp.Unix() {
+				listens = append(listens, Listen{}.FromMaloja(listen))
+			} else {
+				break out
+			}
+		}
+
+		page += 1
+	}
+
+	slices.Reverse(listens)
+	return listens, nil
+}
+
+func (l Listen) FromMaloja(mlListen maloja.Listen) Listen {
+	track := mlListen.Track
+	listen := Listen{
+		ListenedAt:       time.Unix(mlListen.ListenedAt, 0),
+		PlaybackDuration: time.Duration(mlListen.Duration * int64(time.Second)),
+		Track: Track{
+			TrackName:   track.Title,
+			ReleaseName: track.Album.Title,
+			ArtistNames: track.Artists,
+			Duration:    time.Duration(track.Length * int64(time.Second)),
+		},
+	}
+
+	client, found := strings.CutPrefix(mlListen.Origin, "client:")
+	if found {
+		listen.AdditionalInfo["media_player"] = client
+	}
+
+	return listen
+}