Show the message date instead of its time on date change

Fixes: https://todo.sr.ht/~taiite/senpai/17

2 files changed, 25 insertions, 1 deletions

diff --git a/ui/buffers.go b/ui/buffers.go
index b13465f..5e2691c 100644
--- a/ui/buffers.go
+++ b/ui/buffers.go
@@ -758,8 +758,19 @@ func (bs *BufferList) DrawTimeline(screen tcell.Screen, x0, y0, nickColWidth int
 		}
 
 		if yi >= y0 {
-			if i == 0 || b.lines[i-1].At.Truncate(time.Minute) != line.At.Truncate(time.Minute) {
+			var showDate bool
+			if i == 0 || yi == y0 {
+				showDate = true
+			} else {
+				yb, mb, dd := b.lines[i-1].At.Local().Date()
+				ya, ma, da := b.lines[i].At.Local().Date()
+				showDate = yb != ya || mb != ma || dd != da
+			}
+			if showDate {
 				st := tcell.StyleDefault.Bold(true)
+				printDate(screen, x0, yi, st, line.At.Local())
+			} else if b.lines[i-1].At.Truncate(time.Minute) != line.At.Truncate(time.Minute) {
+				st := tcell.StyleDefault.Foreground(tcell.ColorGray)
 				printTime(screen, x0, yi, st, line.At.Local())
 			}
 
diff --git a/ui/draw_utils.go b/ui/draw_utils.go
index 45e81db..3d04f11 100644
--- a/ui/draw_utils.go
+++ b/ui/draw_utils.go
@@ -42,6 +42,19 @@ func printNumber(screen tcell.Screen, x *int, y int, st tcell.Style, n int) {
 	printString(screen, x, y, s)
 }
 
+func printDate(screen tcell.Screen, x int, y int, st tcell.Style, t time.Time) {
+	_, m, d := t.Date()
+	d0 := rune(d/10) + '0'
+	d1 := rune(d%10) + '0'
+	m0 := rune(m/10) + '0'
+	m1 := rune(m%10) + '0'
+	screen.SetContent(x+0, y, d0, nil, st)
+	screen.SetContent(x+1, y, d1, nil, st)
+	screen.SetContent(x+2, y, '/', nil, st)
+	screen.SetContent(x+3, y, m0, nil, st)
+	screen.SetContent(x+4, y, m1, nil, st)
+}
+
 func printTime(screen tcell.Screen, x int, y int, st tcell.Style, t time.Time) {
 	hr0 := rune(t.Hour()/10) + '0'
 	hr1 := rune(t.Hour()%10) + '0'