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fiscal_period.go
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/
fiscal_period.go
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package main
import (
"fmt"
"net/url"
"reflect"
"sort"
"strconv"
"time"
"github.com/mitch000001/timetables/Godeps/_workspace/src/github.com/mitch000001/go-harvest/harvest"
)
type FiscalPeriod struct {
*harvest.Timeframe
BusinessDays int
}
func (f *FiscalPeriod) ToQuery() url.Values {
params := f.Timeframe.ToQuery()
params.Set("business-days", fmt.Sprintf("%d", f.BusinessDays))
return params
}
func FiscalPeriodFromQuery(params url.Values) (*FiscalPeriod, error) {
tf, err := harvest.TimeframeFromQuery(params)
if err != nil {
return nil, err
}
businessDays, err := strconv.Atoi(params.Get("business-days"))
if err != nil {
return nil, err
}
return &FiscalPeriod{Timeframe: &tf, BusinessDays: businessDays}, nil
}
func NewFiscalPeriod(start time.Time, end time.Time, businessDays int) *FiscalPeriod {
timeframe := harvest.Timeframe{StartDate: harvest.NewShortDate(start), EndDate: harvest.NewShortDate(end)}
return &FiscalPeriod{
Timeframe: &timeframe,
BusinessDays: businessDays,
}
}
func (f *FiscalPeriod) InBetween(date time.Time) bool {
return f.StartDate.Before(date) && f.EndDate.After(date)
}
func (f *FiscalPeriod) Overlapping(other *FiscalPeriod) bool {
return f.InBetween(other.StartDate.Time) || f.InBetween(other.EndDate.Time)
}
type FiscalPeriods []*FiscalPeriod
func (f FiscalPeriods) Len() int { return len(f) }
func (f FiscalPeriods) Less(i, j int) bool { return f[i].StartDate.Before(f[j].StartDate.Time) }
func (f FiscalPeriods) Swap(i, j int) { f[i], f[j] = f[j], f[i] }
type ReverseSortedFiscalPeriods []*FiscalPeriod
func (f ReverseSortedFiscalPeriods) Len() int { return len(f) }
func (f ReverseSortedFiscalPeriods) Less(i, j int) bool {
return f[j].StartDate.Before(f[i].StartDate.Time)
}
func (f ReverseSortedFiscalPeriods) Swap(i, j int) { f[i], f[j] = f[j], f[i] }
type FiscalYear struct {
fiscalPeriods FiscalPeriods
Year int
BusinessDays int
CalendarWeeks int
BusinessDaysFirstQuarter int
}
func (f *FiscalYear) init() {
if f.fiscalPeriods == nil {
f.fiscalPeriods = make(FiscalPeriods, 0)
}
}
func (f *FiscalYear) BusinessDaysInFirstQuarter() int {
return f.BusinessDays / 4
}
// CurrentFiscalPeriod returns the FiscalPeriod for the present day
// it returns nil if there is none.
//
// The method is optimized for the common case, i.e. the current period is the last element
// in the slice of periods
func (f *FiscalYear) CurrentFiscalPeriod() *FiscalPeriod {
f.init()
now := time.Now()
reverseSorted := ReverseSortedFiscalPeriods(f.fiscalPeriods)
defer sort.Sort(f.fiscalPeriods)
idx := sort.Search(len(f.fiscalPeriods), func(i int) bool {
return reverseSorted[i].InBetween(now)
})
if idx != len(f.fiscalPeriods) {
return f.fiscalPeriods[idx]
}
return nil
}
func (f *FiscalYear) PastFiscalPeriods() FiscalPeriods {
f.init()
now := time.Now()
var pastFiscalPeriods FiscalPeriods
for _, fp := range f.fiscalPeriods {
if !fp.InBetween(now) {
pastFiscalPeriods = append(pastFiscalPeriods, fp)
}
}
sort.Sort(pastFiscalPeriods)
return pastFiscalPeriods
}
func (f *FiscalYear) FiscalPeriods() FiscalPeriods {
return f.fiscalPeriods
}
func (f *FiscalYear) Add(fiscalPeriod *FiscalPeriod) error {
f.init()
if fiscalPeriod.StartDate.Year() != f.Year || fiscalPeriod.EndDate.Year() != f.Year {
return fmt.Errorf("Der Abrechnungszeitraum wurde für das falsche Jahr angelegt.")
}
idx := sort.Search(len(f.fiscalPeriods), func(i int) bool {
return f.fiscalPeriods[i].Overlapping(fiscalPeriod)
})
if idx == len(f.fiscalPeriods) && idx != 0 {
return fmt.Errorf("Die Abrechnungszeiträume dürfen sich nicht überlappen.")
}
f.fiscalPeriods = append(f.fiscalPeriods, fiscalPeriod)
sort.Sort(f.fiscalPeriods)
return nil
}
func (f *FiscalYear) Delete(fiscalPeriod *FiscalPeriod) {
f.init()
var newFiscalPeriods FiscalPeriods
for _, fp := range f.fiscalPeriods {
if !reflect.DeepEqual(fp, fiscalPeriod) && !reflect.DeepEqual(fp.Timeframe, fiscalPeriod.Timeframe) {
newFiscalPeriods = append(newFiscalPeriods, fp)
}
}
sort.Sort(newFiscalPeriods)
f.fiscalPeriods = newFiscalPeriods
}
type FiscalYears []*FiscalYear
func (f FiscalYears) Len() int { return len(f) }
func (f FiscalYears) Less(i, j int) bool { return f[i].Year < f[j].Year }
func (f FiscalYears) Swap(i, j int) { f[i], f[j] = f[j], f[i] }