bunch of work on Subsonic mediaprovider adapter

backend/mediaprovider/subsonic/searchiterbase.go

@@ -0,0 +1,33 @@
+package subsonic
+
+import (
+	"log"
+	"strconv"
+
+	"github.com/dweymouth/go-subsonic/subsonic"
+)
+
+type searchIterBase struct {
+	query        string
+	artistOffset int
+	albumOffset  int
+	songOffset   int
+	s            *subsonic.Client
+}
+
+func (s *searchIterBase) fetchResults() *subsonic.SearchResult3 {
+	searchOpts := map[string]string{
+		"artistOffset": strconv.Itoa(s.artistOffset),
+		"albumOffset":  strconv.Itoa(s.albumOffset),
+		"songOffset":   strconv.Itoa(s.songOffset),
+	}
+	results, err := s.s.Search3(s.query, searchOpts)
+	if err != nil {
+		log.Println(err)
+		results = nil
+	}
+	if results == nil || len(results.Album)+len(results.Artist)+len(results.Song) == 0 {
+		return nil
+	}
+	return results
+}