ListenBrainz: Support import of loves without recording MBID

backends/listenbrainz/client.go

@@ -125,3 +125,22 @@ func (c Client) SendFeedback(feedback Feedback) (result StatusResult, err error)
 	}
 	return
 }
+
+func (c Client) Lookup(recordingName string, artistName string) (result LookupResult, err error) {
+	const path = "/metadata/lookup"
+	errorResult := ErrorResult{}
+	response, err := c.HttpClient.R().
+		SetQueryParams(map[string]string{
+			"recording_name": recordingName,
+			"artist_name":    artistName,
+		}).
+		SetResult(&result).
+		SetError(&errorResult).
+		Get(path)
+
+	if response.StatusCode() != 200 {
+		err = errors.New(errorResult.Error)
+		return
+	}
+	return
+}

backends/listenbrainz/client_test.go

@@ -100,6 +100,23 @@ func TestSendFeedback(t *testing.T) {
 	assert.Equal(t, "ok", result.Status)
 }
 
+func TestLookup(t *testing.T) {
+	defer httpmock.DeactivateAndReset()
+
+	client := listenbrainz.NewClient("thetoken")
+	setupHttpMock(t, client.HttpClient.GetClient(),
+		"https://api.listenbrainz.org/1/metadata/lookup",
+		"testdata/lookup.json")
+
+	result, err := client.Lookup("Paradise Lost", "Say Just Words")
+	require.NoError(t, err)
+
+	assert := assert.New(t)
+	assert.Equal("Say Just Words", result.RecordingName)
+	assert.Equal("Paradise Lost", result.ArtistCreditName)
+	assert.Equal("569436a1-234a-44bc-a370-8f4d252bef21", result.RecordingMbid)
+}
+
 func setupHttpMock(t *testing.T, client *http.Client, url string, testDataPath string) {
 	httpmock.ActivateNonDefault(client)
 

backends/listenbrainz/listenbrainz.go

@@ -132,15 +132,23 @@ func (b ListenBrainzApiBackend) ImportLoves(loves []models.Love, oldestTimestamp
 			continue
 		}
 
-		// TODO: Support love import without recording MBID
+		recordingMbid := string(love.RecordingMbid)
-		if love.RecordingMbid != "" {
+
+		if recordingMbid == "" {
+			lookup, err := b.client.Lookup(love.TrackName, love.ArtistName())
+			if err == nil {
+				recordingMbid = lookup.RecordingMbid
+			}
+		}
+
+		if recordingMbid != "" {
 			ok := false
 			errMsg := ""
-			if existingMbids[string(love.RecordingMbid)] {
+			if existingMbids[recordingMbid] {
 				ok = true
 			} else {
 				resp, err := b.client.SendFeedback(Feedback{
-					RecordingMbid: string(love.RecordingMbid),
+					RecordingMbid: recordingMbid,
 					Score:         1,
 				})
 				ok = err == nil && resp.Status == "ok"

backends/listenbrainz/models.go

@@ -85,6 +85,15 @@ type Feedback struct {
 	UserName      string `json:"user_id,omitempty"`
 }
 
+type LookupResult struct {
+	ArtistCreditName string   `json:"artist_credit_name"`
+	ReleaseName      string   `json:"release_name"`
+	RecordingName    string   `json:"recording_name"`
+	RecordingMbid    string   `json:"recording_mbid"`
+	ReleaseMbid      string   `json:"release_mbid"`
+	ArtistMbids      []string `json:"artist_mbids"`
+}
+
 type StatusResult struct {
 	Status string `json:"status"`
 }

backends/listenbrainz/testdata/lookup.json

@@ -0,0 +1,10 @@
+{
+  "artist_credit_name": "Paradise Lost",
+  "artist_mbids": [
+    "10bf95b6-30e3-44f1-817f-45762cdc0de0"
+  ],
+  "recording_mbid": "569436a1-234a-44bc-a370-8f4d252bef21",
+  "recording_name": "Say Just Words",
+  "release_mbid": "90b2d144-e5f3-3192-9da5-0d72d67c61be",
+  "release_name": "One Second"
+}