wip markets

market_status.go

@@ -0,0 +1,99 @@
+package mujica
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/egoist/mygo/ui"
+
+	"mujicaui/icons"
+	"mujicaui/theme"
+)
+
+// MarketPhase is a market's trading state. The zero value is MarketClosed.
+type MarketPhase int
+
+const (
+	MarketClosed MarketPhase = iota
+	MarketPreMarket
+	MarketOpen
+	MarketAfterHours
+	MarketHoliday
+)
+
+var marketPhases = [5]struct{ key, icon string }{
+	{"market_status.closed", "lock"}, {"market_status.pre", "sun"}, {"market_status.open", "circle-check"},
+	{"market_status.after", "moon"}, {"market_status.holiday", "calendar"},
+}
+
+// MarketStatusOptions configure a MarketStatus.
+type MarketStatusOptions struct {
+	// Market names the venue, such as "NYSE".
+	Market string
+	// Next and NextPhase say when the phase changes; zero Next hides it.
+	Next      time.Time
+	NextPhase MarketPhase
+	// Now counts down to Next; zero uses the window clock.
+	Now time.Time
+}
+
+// MarketStatus shows a market's phase with an icon and word, and when it changes next.
+func MarketStatus(c *ui.Context, phase MarketPhase, opts MarketStatusOptions) *ui.Element {
+	marketPhaseCheck(phase)
+	marketPhaseCheck(opts.NextPhase)
+	k := Tokens(c)
+	u := Density(c).Unit()
+	now := opts.Now
+	if now.IsZero() {
+		now = c.Now()
+	}
+	word := msg(c, marketPhases[phase].key)
+	ink := k.TextMuted
+	if phase == MarketOpen {
+		ink = k.Success
+	}
+	label := word
+	if opts.Market != "" {
+		label = opts.Market + ": " + word
+	}
+	next := ""
+	if !opts.Next.IsZero() {
+		next = fmt.Sprintf(msg(c, "market_status.next"), msg(c, marketPhases[opts.NextPhase].key), opts.Next.Format("15:04"),
+			marketStatusIn(c, opts.Next.Sub(now)))
+		label += ", " + next
+		// The countdown changes once a minute.
+		c.After(time.Minute - time.Duration(now.Second())*time.Second)
+	}
+	row := ui.Row(c).Gap(u * 2).AlignItems(ui.Center).Role(ui.RoleStatus).Label(label)
+	row.Children(func() {
+		ui.Row(c).Gap(u).AlignItems(ui.Center).Padding(u/2, u*2).Radius(theme.ControlRadius).Border(theme.BorderWidth, ink).Children(func() {
+			ui.Icon(c, icons.Must(marketPhases[phase].icon)).Size(14, 14).TextColor(ink)
+			if opts.Market != "" {
+				ui.Text(c, opts.Market).Bold().FontSize(FontSize(c, theme.CaptionSize)).TextColor(k.Text).SingleLine()
+			}
+			ui.Text(c, word).FontSize(FontSize(c, theme.CaptionSize)).TextColor(ink).FontWeight(600).SingleLine()
+		})
+		if next != "" {
+			ui.Text(c, next).FontSize(FontSize(c, theme.CaptionSize)).TextColor(k.TextMuted).SingleLine()
+		}
+	})
+	return row
+}
+
+func marketPhaseCheck(p MarketPhase) {
+	if p < MarketClosed || p > MarketHoliday {
+		panic("mujica: MarketPhase out of range")
+	}
+}
+
+// marketStatusIn writes a duration as "2h 05m" or "12m"; past times read "now".
+func marketStatusIn(c *ui.Context, d time.Duration) string {
+	if d <= 0 {
+		return msg(c, "market_status.now")
+	}
+	m := int(d.Round(time.Minute) / time.Minute)
+	if m >= 60 {
+		return fmt.Sprintf(msg(c, "market_status.hm"), m/60, m%60)
+	}
+	return fmt.Sprintf(msg(c, "market_status.m"), max(m, 1))
+}