Split into category packages; module github.com/ZacharyZhang-NY/MujicaUI

devtools/service_status.go

@@ -0,0 +1,106 @@
+package devtools
+
+import (
+	"fmt"
+
+	"github.com/egoist/mygo/ui"
+
+	"github.com/ZacharyZhang-NY/MujicaUI/agent"
+	"github.com/ZacharyZhang-NY/MujicaUI/chart"
+	"github.com/ZacharyZhang-NY/MujicaUI/core"
+	"github.com/ZacharyZhang-NY/MujicaUI/theme"
+)
+
+// ServiceHealth is a service's state. The zero value is ServiceOperational.
+type ServiceHealth int
+
+const (
+	ServiceOperational ServiceHealth = iota
+	ServiceDegraded
+	ServiceOutage
+)
+
+// ServiceItem is one service the caller reports.
+type ServiceItem struct {
+	Name   string
+	Health ServiceHealth
+	// Note explains a degraded or down service.
+	Note string
+}
+
+// ServiceStatusOptions configure a ServiceStatus.
+type ServiceStatusOptions struct {
+	// MaxHeight caps the scrolling list; zero means 360.
+	MaxHeight float32
+}
+
+// ServiceStatus lists service health and an overall summary.
+func ServiceStatus(c *ui.Context, services []ServiceItem, opts ServiceStatusOptions) *ui.Element {
+	if opts.MaxHeight < 0 {
+		panic("mujica: ServiceStatus MaxHeight is negative")
+	}
+	col := ui.Column(c).Shrink(0).Gap(core.Density(c).Unit() * 2)
+	summaryState := ui.Local(col, "mujica.services.summary", func() serviceSummary { return serviceSummary{key: "unset"} })
+	if key := chart.ChartID(services); key != summaryState.key {
+		worst, counts := ServiceOperational, [3]int{}
+		for i, s := range services {
+			if s.Name == "" || s.Health < ServiceOperational || s.Health > ServiceOutage {
+				panic(fmt.Sprintf("mujica: ServiceStatus service %d needs a Name and a known Health", i))
+			}
+			worst = max(worst, s.Health)
+			counts[s.Health]++
+		}
+		summaryState.key, summaryState.worst, summaryState.counts = key, worst, counts
+	}
+	worst, counts := summaryState.worst, summaryState.counts
+	maxH := opts.MaxHeight
+	if maxH == 0 {
+		maxH = 360
+	}
+	k := core.Tokens(c)
+	u := core.Density(c).Unit()
+	summary := core.Msg(c, [...]string{"service_status.all_ok", "service_status.some_degraded", "service_status.some_down"}[worst])
+	col.Label(summary)
+	col.Children(func() {
+		ui.Row(c).Gap(u*3).AlignItems(ui.Center).Padding(u*3).Radius(theme.CardRadius).Border(theme.BorderWidth, k.Border).
+			Background(k.Surface).Role(ui.RoleStatus).Label(summary).Children(func() {
+			devtoolsSeverity(c, serviceSeverity(worst), summary)
+			ui.Box(c).Grow(1)
+			agent.AgentCaption(c, fmt.Sprintf(core.Msg(c, "service_status.counts"), counts[0], counts[1], counts[2]))
+		})
+		if len(services) == 0 {
+			agent.AgentCaption(c, core.Msg(c, "service_status.empty"))
+			return
+		}
+		agent.AgentRows(c, len(services), func(i int) {
+			s := services[i]
+			word := serviceWord(c, s.Health)
+			ui.Row(c).Key(i).Gap(u*3).AlignItems(ui.Center).MinHeight(core.Density(c).ControlHeight()).Padding(u, u*3).
+				Label(s.Name + ", " + word).Children(func() {
+				ui.Column(c).Grow(1).Shrink(1).Children(func() {
+					ui.Text(c, s.Name).SingleLine()
+					if s.Note != "" {
+						agent.AgentCaption(c, s.Note)
+					}
+				})
+				devtoolsSeverity(c, serviceSeverity(s.Health), word)
+			})
+		}).Shrink(1).MaxHeight(maxH).Background(k.Surface).Border(theme.BorderWidth, k.Border).
+			Radius(theme.CardRadius).Dividers(theme.BorderWidth, k.Border)
+	})
+	return col
+}
+
+func serviceSeverity(h ServiceHealth) core.Severity {
+	return [...]core.Severity{core.SeveritySuccess, core.SeverityWarning, core.SeverityError}[h]
+}
+
+func serviceWord(c *ui.Context, h ServiceHealth) string {
+	return core.Msg(c, [...]string{"service_status.operational", "service_status.degraded", "service_status.outage"}[h])
+}
+
+type serviceSummary struct {
+	key    string
+	worst  ServiceHealth
+	counts [3]int
+}