Basic backend structure and listen transfer implementation

backends/dump.go

@@ -0,0 +1,49 @@
+/*
+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 (
+	"fmt"
+	"time"
+
+	"github.com/spf13/viper"
+)
+
+type DumpBackend struct{}
+
+func (b DumpBackend) FromConfig(config *viper.Viper) Backend {
+	return b
+}
+
+func (b DumpBackend) ImportListens(listens []Listen, oldestTimestamp time.Time) (ImportResult, error) {
+	result := ImportResult{
+		Count:         len(listens),
+		LastTimestamp: oldestTimestamp,
+	}
+	if result.Count > 0 {
+		result.LastTimestamp = listens[len(listens)-1].ListenedAt
+	}
+	for _, listen := range listens {
+		fmt.Printf("Listen: \"%s\" by %s\n", listen.TrackName, listen.ArtistName())
+	}
+	return result, nil
+}