add top artists display to profile

web/profile.go

@@ -34,6 +34,10 @@ type ProfileData struct {
 	TemplateName        string
 	NowPlayingArtist    string
 	NowPlayingTitle     string
+	TopArtists          []db.TopArtist
+	TopArtistsPeriod    string
+	TopArtistsLimit     int
+	TopArtistsView      string
 }
 
 // Render a page of the profile in the URL
@@ -85,6 +89,72 @@ func profilePageHandler() http.HandlerFunc {
 			return
 		}
 
+		period := r.URL.Query().Get("period")
+		if period == "" {
+			period = "all_time"
+		}
+
+		view := r.URL.Query().Get("view")
+		if view == "" {
+			view = "grid"
+		}
+
+		maxLimit := 30
+		if view == "grid" {
+			maxLimit = 8
+		}
+
+		limitStr := r.URL.Query().Get("limit")
+		limit := 10
+		if limitStr != "" {
+			limit, err = strconv.Atoi(limitStr)
+			if err != nil || limit < 5 {
+				limit = 10
+			}
+			if limit > maxLimit {
+				limit = maxLimit
+			}
+		}
+
+		profileData.TopArtistsPeriod = period
+		profileData.TopArtistsLimit = limit
+		profileData.TopArtistsView = view
+
+		var startDate, endDate *time.Time
+		now := time.Now()
+		switch period {
+		case "week":
+			start := now.AddDate(0, 0, -7)
+			startDate = &start
+		case "month":
+			start := now.AddDate(0, -1, 0)
+			startDate = &start
+		case "year":
+			start := now.AddDate(-1, 0, 0)
+			startDate = &start
+		case "custom":
+			startStr := r.URL.Query().Get("start")
+			endStr := r.URL.Query().Get("end")
+			if startStr != "" {
+				if t, err := time.Parse("2006-01-02", startStr); err == nil {
+					startDate = &t
+				}
+			}
+			if endStr != "" {
+				if t, err := time.Parse("2006-01-02", endStr); err == nil {
+					t = t.AddDate(0, 0, 1)
+					endDate = &t
+				}
+			}
+		}
+
+		topArtists, err := db.GetTopArtists(userId, limit, startDate, endDate)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Cannot get top artists: %v\n", err)
+		} else {
+			profileData.TopArtists = topArtists
+		}
+
 		if pageInt == 1 {
 			if np, ok := scrobble.GetNowPlaying(userId); ok {
 				profileData.NowPlayingArtist = np.Artist

web/utils.go

@@ -19,6 +19,49 @@ func add(a int, b int) int {
 	return a + b
 }
 
+// Divides two integers (integer division)
+func div(a int, b int) int {
+	if b == 0 {
+		return 0
+	}
+	return a / b
+}
+
+// Returns a % b
+func mod(a int, b int) int {
+	return a % b
+}
+
+// Returns a slice of a slice from start to end
+func slice(a []db.TopArtist, start int, end int) []db.TopArtist {
+	if start >= len(a) {
+		return []db.TopArtist{}
+	}
+	if end > len(a) {
+		end = len(a)
+	}
+	return a[start:end]
+}
+
+func gridReorder(artists []db.TopArtist) []db.TopArtist {
+	if len(artists) < 2 {
+		return artists
+	}
+	if len(artists)%2 == 0 {
+		return artists
+	}
+	remaining := len(artists) - 1
+	perRow := remaining / 2
+	rest := artists[1:]
+	firstRow := rest[:perRow]
+	secondRow := rest[perRow:]
+	var reordered []db.TopArtist
+	reordered = append(reordered, artists[0])
+	reordered = append(reordered, secondRow...)
+	reordered = append(reordered, firstRow...)
+	return reordered
+}
+
 // Put a comma in the thousands place, ten-thousands place etc.
 func formatInt(n int) string {
 	if n < 1000 {

web/web.go

@@ -33,6 +33,10 @@ func init() {
 	funcMap := template.FuncMap{
 		"sub":                 sub,
 		"add":                 add,
+		"div":                 div,
+		"mod":                 mod,
+		"slice":               slice,
+		"gridReorder":         gridReorder,
 		"formatInt":           formatInt,
 		"formatTimestamp":     formatTimestamp,
 		"formatTimestampFull": formatTimestampFull,