add artist discography page

ui/artistpage.go

@@ -0,0 +1,73 @@
+package ui
+
+import (
+	"log"
+	"supersonic/backend"
+
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/container"
+	"fyne.io/fyne/v2/layout"
+	"fyne.io/fyne/v2/theme"
+	"fyne.io/fyne/v2/widget"
+)
+
+var _ fyne.Widget = (*ArtistPage)(nil)
+
+type ArtistPage struct {
+	widget.BaseWidget
+
+	artistID    string
+	im          *backend.ImageManager
+	sm          *backend.ServerManager
+	grid        *AlbumGrid
+	titleDisp   *widget.RichText
+	container   *fyne.Container
+	OnPlayAlbum func(string)
+}
+
+func NewArtistPage(artistID string, sm *backend.ServerManager, im *backend.ImageManager) *ArtistPage {
+	a := &ArtistPage{
+		artistID: artistID,
+		sm:       sm,
+		im:       im,
+	}
+	a.ExtendBaseWidget(a)
+	a.titleDisp = widget.NewRichTextWithText("Artist")
+	a.titleDisp.Segments[0].(*widget.TextSegment).Style = widget.RichTextStyle{
+		SizeName: theme.SizeNameHeadingText,
+	}
+	a.container = container.NewBorder(a.titleDisp, nil, nil, nil, layout.NewSpacer())
+	a.loadAsync()
+	return a
+}
+
+func (a *ArtistPage) SetPlayAlbumCallback(cb func(string)) {
+	a.OnPlayAlbum = cb
+}
+
+func (a *ArtistPage) onPlayAlbum(albumID string) {
+	if a.OnPlayAlbum != nil {
+		a.OnPlayAlbum(albumID)
+	}
+}
+
+func (a *ArtistPage) loadAsync() {
+	go func() {
+		artist, err := a.sm.Server.GetArtist(a.artistID)
+		if err != nil {
+			log.Printf("Failed to get artist: %s", err.Error())
+			return
+		}
+		a.titleDisp.Segments[0].(*widget.TextSegment).Text = artist.Name
+		a.titleDisp.Refresh()
+		ag := NewFixedAlbumGrid(artist.Album, a.im.GetAlbumThumbnail)
+		ag.OnPlayAlbum = a.onPlayAlbum
+		a.container.Objects[0] = ag
+		a.container.Refresh()
+	}()
+}
+
+func (a *ArtistPage) CreateRenderer() fyne.WidgetRenderer {
+	a.ExtendBaseWidget(a)
+	return widget.NewSimpleRenderer(a.container)
+}