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/api/trends prints pie of each of last N months

main
bel 2024-07-21 17:03:44 -06:00
parent 18a19e52f5
commit b8c78fe55e
4 changed files with 89 additions and 0 deletions
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4
cmd/http/public/transactions.html
View File

@ -205,6 +205,10 @@
<summary><i>Look at this graph</i></summary>
<iframe style="background: white; width: 100%;" src="/api/reg?x=y&mode=reg&likeName=Withdrawal:[0123]&chart=stack&predictionMonths=6&prediction=autoContributions=&bpi=true&zoomStart=YYYY-MM"></iframe>
</details>
<details>
<summary><i>Where did the money go</i></summary>
<iframe style="background: white; width: 100%;" src="/api/trends"></iframe>
</details>
</details>
<details open style="display: none;">
<summary>Edit</summary>

47
cmd/http/router.go
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@ -74,6 +74,8 @@ func (router Router) API(w http.ResponseWriter, r *http.Request) {
router.APITransactions(w, r)
case "/api/amend":
router.APIAmend(w, r)
case "/api/trends":
router.APITrends(w, r)
case "/api/reg", "/api/bal":
router.APIReg(w, r)
default:
@ -110,6 +112,51 @@ func (router Router) APITransactions(w http.ResponseWriter, r *http.Request) {
})
}
func (router Router) APITrends(w http.ResponseWriter, r *http.Request) {
bpis, err := router.bpis()
if err != nil {
panic(err)
}
deltas, err := router.files.Deltas()
if err != nil {
panic(err)
}
recent := time.Hour * 24 * 365 / 2
recentHouseRelatedDeltas := deltas.
Like(ledger.LikeTransactions(
deltas.Like(ledger.LikeName(`^House`))...,
)).
Like(ledger.LikeAfter(time.Now().Add(-1 * recent).Format("2006-01"))).
Group(ledger.GroupName(`Withdrawal:[0-9]*:[^:]*`)).
Group(ledger.GroupDate(`^[0-9]*-[0-9]*`)).
Like(ledger.LikeNotName(`^$`))
monthsToDeltas := map[string]ledger.Deltas{}
for _, delta := range recentHouseRelatedDeltas {
monthsToDeltas[delta.Date] = append(monthsToDeltas[delta.Date], delta)
}
months := []string{}
for k := range monthsToDeltas {
months = append(months, k)
}
slices.Sort(months)
fmt.Fprintln(w, "<!DOCTYPE html>")
for _, month := range months {
balances := monthsToDeltas[month].Balances().WithBPIs(bpis)
chart := view.NewChart("pie")
for category, balance := range balances {
chart.AddY(category, []int{int(balance[ledger.USD])})
}
fmt.Fprintln(w, "<h2>", month, "</h2>")
if err := chart.Render(w); err != nil {
panic(err)
}
}
}
func (router Router) APIAmend(w http.ResponseWriter, r *http.Request) {
b, _ := io.ReadAll(r.Body)

6
src/ledger/like.go
View File

@ -35,6 +35,12 @@ func LikeAfter(date string) Like {
}
}
func LikeNotName(pattern string) Like {
return func(d Delta) bool {
return !like(pattern, d.Name)
}
}
func LikeName(pattern string) Like {
return func(d Delta) bool {
return like(pattern, d.Name)

32
src/view/chart.go
View File

@ -23,6 +23,8 @@ func NewChart(name string) Chart {
return NewBar()
case "stack":
return NewStack()
case "pie":
return NewPie()
default:
panic("bad chart name " + name)
}
@ -107,3 +109,33 @@ func (stack Stack) AddY(name string, v []int) {
Stack: "stackA",
}))
}
type Pie struct {
*charts.Pie
series []opts.PieData
}
func NewPie() *Pie {
return &Pie{Pie: charts.NewPie()}
}
func (pie *Pie) AddX(v interface{}) {
}
func (pie *Pie) Render(w io.Writer) error {
pie.AddSeries("", pie.series)
return pie.Pie.Render(w)
}
func (pie *Pie) AddY(name string, v []int) {
for _, v := range v {
pie.series = append(pie.series, opts.PieData{
Name: fmt.Sprintf("%s ($%d)", name, v),
Value: v,
})
}
}
func (pie *Pie) Overlap(other Chart) {
panic("nope")
}