69 lines
1.8 KiB
Go
69 lines
1.8 KiB
Go
package ledger
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import (
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"fmt"
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"io"
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"log"
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"maps"
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"time"
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)
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func RegisterWithContributionPrediction(reg map[string]Balances, windowAsPercentOfTotalDuration float64) (map[string]Balances, error) {
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return reg, io.EOF
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}
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func BPIWithFixedGrowthPrediction(reg map[string]Balances, windowAsPercentOfTotalDuration float64, pattern string, rate float64) (map[string]Balances, error) {
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result := make(map[string]Balances)
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return result, io.EOF
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}
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func RegisterWithCompoundingInterestPrediction(reg map[string]Balances, windowAsPercentOfTotalDuration float64, pattern string, rate float64) (map[string]Balances, error) {
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nameToLastDate := func() map[string]string {
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result := map[string]string{}
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for date, balances := range reg {
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for name := range balances {
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if result[name] < date {
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result[name] = date
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}
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}
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}
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return result
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}()
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firstTime, lastTime := func() (time.Time, time.Time) {
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var latest time.Time
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first := time.Now()
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for _, v := range nameToLastDate {
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v2, _ := dateToTime(v)
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if latest.Before(v2) {
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latest = v2
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}
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if first.Before(v2) {
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first = v2
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}
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}
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return first, latest
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}()
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log.Println("first", firstTime, "last time", lastTime, "nameToDate", nameToLastDate)
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lastPrediction := lastTime
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for lastPrediction.Before(lastTime.Add(lastTime.Sub(firstTime) * time.Duration(windowAsPercentOfTotalDuration))) {
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lastPrediction = lastPrediction.Add(time.Hour * 24 * (45 - lastPrediction.Day()))
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TODO ^
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}
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result := maps.Clone(reg)
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return result, io.EOF
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}
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func dateToTime(s string) (time.Time, error) {
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for _, layout := range []string{
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"2006-01-02",
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"2006-01",
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} {
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if t, err := time.ParseInLocation(layout, s, time.Local); err == nil {
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return t, err
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}
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}
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return time.Time{}, fmt.Errorf("no layout matching %q", s)
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}
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