138 lines
3.8 KiB
Go
138 lines
3.8 KiB
Go
package devtools
|
|
|
|
import (
|
|
"fmt"
|
|
"math"
|
|
|
|
"github.com/egoist/mygo/ui"
|
|
|
|
"git.zacharyzhang.com/ZacharyZhang-NY/MujicaUI/chart"
|
|
"git.zacharyzhang.com/ZacharyZhang-NY/MujicaUI/core"
|
|
"git.zacharyzhang.com/ZacharyZhang-NY/MujicaUI/internal"
|
|
)
|
|
|
|
// UptimeDay holds availability; NaN marks missing data.
|
|
type UptimeDay struct {
|
|
Date core.Date
|
|
Uptime float64
|
|
// Note says what happened, as "12 min outage".
|
|
Note string
|
|
}
|
|
|
|
// UptimeBarOptions configure an UptimeBar; Frame.Height 0 means 36.
|
|
type UptimeBarOptions struct {
|
|
Frame chart.ChartFrame
|
|
// Degraded and Down default to 0.999 and 0.95.
|
|
Degraded, Down float64
|
|
}
|
|
|
|
// UptimeBar shows daily availability with pointer and keyboard readouts.
|
|
func UptimeBar(c *ui.Context, days []UptimeDay, opts UptimeBarOptions) chart.ChartResult {
|
|
deg, down := opts.Degraded, opts.Down
|
|
if deg == 0 {
|
|
deg = 0.999
|
|
}
|
|
if down == 0 {
|
|
down = 0.95
|
|
}
|
|
if !(down < deg && deg <= 1 && down > 0) {
|
|
panic("mujica: UptimeBar needs 0 < Down < Degraded <= 1")
|
|
}
|
|
|
|
if opts.Frame.Height == 0 {
|
|
opts.Frame.Height = 36
|
|
}
|
|
k := core.Tokens(c)
|
|
ch := chart.NewChart(c, opts.Frame)
|
|
n := len(days)
|
|
cache := ui.Local(ch.Res.Element, "mujica.uptime", func() uptimeCache { return uptimeCache{} })
|
|
if cache.key != chart.ChartID(days) {
|
|
for i, d := range days {
|
|
if !math.IsNaN(d.Uptime) && (d.Uptime < 0 || d.Uptime > 1) {
|
|
panic(fmt.Sprintf("mujica: UptimeBar day %d outside 0..1", i))
|
|
}
|
|
}
|
|
cache.key, cache.width = chart.ChartID(days), -1
|
|
}
|
|
band := func(r ui.Rect) internal.Band { return internal.Band{N: n, R0: r.X, R1: r.X + r.W, Pad: 0.25} }
|
|
level := func(v float64) int { // 0 ok, 1 degraded, 2 down, 3 no data
|
|
switch {
|
|
case math.IsNaN(v):
|
|
return 3
|
|
case v < down:
|
|
return 2
|
|
case v < deg:
|
|
return 1
|
|
}
|
|
return 0
|
|
}
|
|
pal := internal.Palette(k)
|
|
words := [...]string{core.Msg(c, "uptime_bar.ok"), core.Msg(c, "uptime_bar.degraded"), core.Msg(c, "uptime_bar.down"), core.Msg(c, "uptime_bar.nodata")}
|
|
res, _ := ch.Build(chart.ChartSpec{
|
|
Marks: n,
|
|
Draw: func(p *ui.Painter, r ui.Rect, active int) {
|
|
b := band(r)
|
|
cache.prepare(days, max(1, int(math.Ceil(float64(r.W*p.Scale())))))
|
|
for _, slot := range cache.slots {
|
|
d := days[slot.index]
|
|
x, w := internal.Snap(p, b.Start(slot.first)), max(b.Start(slot.last)+b.Width()-b.Start(slot.first), 1)
|
|
lv := level(d.Uptime)
|
|
col := [...]ui.Color{pal[2], pal[3], k.Danger, k.TextMuted}[lv]
|
|
// Shorter bars distinguish degraded days and outages.
|
|
h := r.H * [...]float32{1, 0.75, 0.5, 1}[lv]
|
|
bar := ui.Rect{X: x, Y: r.Y + r.H - h, W: w, H: h}
|
|
if lv == 3 {
|
|
p.Stroke(bar, col, 1, 1)
|
|
} else {
|
|
p.Fill(bar, col, 1)
|
|
}
|
|
if active >= slot.first && active <= slot.last {
|
|
p.Stroke(ui.Rect{X: x - 2, Y: r.Y - 2, W: w + 4, H: r.H + 4}, k.Focus, 2, 1.5)
|
|
}
|
|
}
|
|
},
|
|
Pick: func(r ui.Rect, x, _ float32) int {
|
|
b := band(r)
|
|
return max(0, min(n-1, int((x-r.X)/b.Step())))
|
|
},
|
|
Readout: func(i int) string {
|
|
d := days[i]
|
|
s := fmt.Sprintf("%s · %s", d.Date.String(), words[level(d.Uptime)])
|
|
if !math.IsNaN(d.Uptime) {
|
|
s += fmt.Sprintf(" · %.2f%%", d.Uptime*100)
|
|
}
|
|
if d.Note != "" {
|
|
s += " · " + d.Note
|
|
}
|
|
return s
|
|
},
|
|
})
|
|
return res
|
|
}
|
|
|
|
type uptimeSlot struct{ first, last, index int }
|
|
type uptimeCache struct {
|
|
key string
|
|
width int
|
|
slots []uptimeSlot
|
|
}
|
|
|
|
func (s *uptimeCache) prepare(days []UptimeDay, width int) {
|
|
if s.width == width {
|
|
return
|
|
}
|
|
s.width, s.slots = width, s.slots[:0]
|
|
n := len(days)
|
|
for first := 0; first < n; {
|
|
last := min(n-1, max(first, ((first*width/n+1)*n-1)/width))
|
|
index := first
|
|
for i := first + 1; i <= last; i++ {
|
|
if math.IsNaN(days[index].Uptime) || !math.IsNaN(days[i].Uptime) && days[i].Uptime < days[index].Uptime {
|
|
index = i
|
|
}
|
|
}
|
|
s.slots = append(s.slots, uptimeSlot{first, last, index})
|
|
first = last + 1
|
|
}
|
|
}
|