From a2a69c3fd9f0149650f8c53d985049a38f36f238 Mon Sep 17 00:00:00 2001
From: Thibaut Horel <thibaut.horel@gmail.com>
Date: Mon, 19 Jun 2017 22:21:33 -0400
Subject: Lastfm loved tracks import

---
 lfmclient.go | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 64 insertions(+), 11 deletions(-)

(limited to 'lfmclient.go')

diff --git a/lfmclient.go b/lfmclient.go
index bbc0492..1ce822d 100644
--- a/lfmclient.go
+++ b/lfmclient.go
@@ -229,20 +229,73 @@ func (app *App) ImportRecentTracks(user *User) {
 	}
 }
 
-func (app *App) LovedTracks(user string) []LovedTrack {
-	r := app.LfmQuery(map[string]string{
-		"method": "user.getLovedTracks",
-		"limit":  "100",
-		"user":   user,
-	})
-	var dst map[string]struct {
+type LovedTracks struct {
+	dst map[string]struct {
 		Attrs  PageAttrs    `json:"@attr"`
 		Tracks []LovedTrack `json:"track"`
 	}
-	json.Unmarshal(r, &dst)
-	root := dst["lovedtracks"]
-	tracks := root.Tracks
-	return tracks
+	payload map[string]string
+	page    int
+	done    bool
+	*App
+}
+
+func NewLovedTracks(name string, app *App) *LovedTracks {
+	lt := &LovedTracks{App: app, page: 1}
+	lt.payload = map[string]string{
+		"method": "user.getLovedTracks",
+		"limit":  "200",
+		"user":   name,
+	}
+	return lt
+}
+
+func (lt *LovedTracks) Next() []LovedTrack {
+	if lt.done {
+		return nil
+	}
+	lt.payload["page"] = strconv.Itoa(lt.page)
+	r := lt.App.LfmQuery(lt.payload)
+	json.Unmarshal(r, &lt.dst)
+	root := lt.dst["lovedtracks"]
+	totalPages, _ := strconv.Atoi(root.Attrs.TotalPages)
+	if totalPages == lt.page {
+		lt.done = true
+	}
+	lt.page++
+	return root.Tracks
+}
+
+func (app *App) ImportLovedTracks(user *User) {
+	s := &Session{
+		UserId:        user.Id,
+		Client:        "import",
+		ClientVersion: "",
+		Key:           randomToken(16),
+		Protocol:      "1.2.1",
+	}
+	app.PutSession(s)
+	ll, _ := app.LoveImportStats(user.LfmName)
+	lt := NewLovedTracks(user.LfmName, app)
+	ltracks := make([]LovedTrack, 0, 200)
+	li := LoveImport{Count: 0, LfmName: user.LfmName}
+	for tracks := lt.Next(); len(tracks) > 0; tracks = lt.Next() {
+		ltracks = ltracks[:0]
+		for _, t := range tracks {
+			if t.Date.ToTime().Before(ll.Time) {
+				break
+			}
+			ltracks = append(ltracks, t)
+		}
+		if err := app.InsertLovedTracks(ltracks, s); err != nil {
+			log.Println(err)
+			return
+		}
+		li.Count += len(ltracks)
+	}
+	if err := app.InsertLoveImport(&li); err != nil {
+		log.Println(err)
+	}
 }
 
 func (app *App) GetSong(s *Song) {
-- 
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