97 lines
2.6 KiB
Go
97 lines
2.6 KiB
Go
package mujica
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import (
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"fmt"
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"math"
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"github.com/egoist/mygo/ui"
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"mujicaui/internal"
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)
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// UptimeDay is one day's availability, 0 to 1; NaN means no data.
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type UptimeDay struct {
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Date Date
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Uptime float64
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// Note says what happened, as "12 min outage".
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Note string
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}
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// UptimeBarOptions configure an UptimeBar; Frame.Height 0 means 36.
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type UptimeBarOptions struct {
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Frame ChartFrame
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// Degraded and Down are the uptime limits below which a day is marked; zero means 0.999 and 0.95.
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Degraded, Down float64
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}
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// UptimeBar draws one bar per day by availability; hover or arrows read a day's detail.
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func UptimeBar(c *ui.Context, days []UptimeDay, opts UptimeBarOptions) ChartResult {
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deg, down := opts.Degraded, opts.Down
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if deg == 0 {
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deg = 0.999
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}
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if down == 0 {
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down = 0.95
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}
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if !(down < deg && deg <= 1 && down > 0) {
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panic("mujica: UptimeBar needs 0 < Down < Degraded <= 1")
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}
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for i, d := range days {
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if !math.IsNaN(d.Uptime) && (d.Uptime < 0 || d.Uptime > 1) {
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panic(fmt.Sprintf("mujica: UptimeBar day %d uptime %v outside 0..1", i, d.Uptime))
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}
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}
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if opts.Frame.Height == 0 {
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opts.Frame.Height = 36
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}
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k := Tokens(c)
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ch := newChart(c, opts.Frame)
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n := len(days)
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band := func(r ui.Rect) internal.Band { return internal.Band{N: n, R0: r.X, R1: r.X + r.W, Pad: 0.25} }
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level := func(v float64) int { // 0 ok, 1 degraded, 2 down, 3 no data
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switch {
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case math.IsNaN(v):
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return 3
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case v < down:
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return 2
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case v < deg:
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return 1
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}
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return 0
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}
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words := [...]string{msg(c, "uptime_bar.ok"), msg(c, "uptime_bar.degraded"), msg(c, "uptime_bar.down"), msg(c, "uptime_bar.nodata")}
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res, _ := ch.build(ChartSpec{
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Marks: n,
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Draw: func(p *ui.Painter, r ui.Rect, active int) {
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b := band(r)
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for i, d := range days {
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x, w := internal.Snap(p, b.Start(i)), max(b.Width(), 1)
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lv := level(d.Uptime)
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col := [...]ui.Color{k.Success, k.Warning, k.Danger, k.Border}[lv]
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// Shorter bars mark bad days, so color is not the only cue.
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h := r.H * [...]float32{1, 0.75, 0.5, 1}[lv]
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p.Fill(ui.Rect{X: x, Y: r.Y + r.H - h, W: w, H: h}, col, 1)
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if i == active {
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p.Stroke(ui.Rect{X: x - 2, Y: r.Y - 2, W: w + 4, H: r.H + 4}, k.Focus, 2, 1.5)
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}
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}
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},
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Pick: func(r ui.Rect, x, _ float32) int {
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b := band(r)
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return max(0, min(n-1, int((x-r.X)/b.Step())))
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},
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Readout: func(i int) string {
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d := days[i]
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s := fmt.Sprintf("%s · %s", d.Date.String(), words[level(d.Uptime)])
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if !math.IsNaN(d.Uptime) {
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s += fmt.Sprintf(" · %.2f%%", d.Uptime*100)
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}
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if d.Note != "" {
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s += " · " + d.Note
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}
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return s
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},
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})
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return res
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}
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