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Store currency/security values/prices using big.Rat natively

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This adds 'shadow' types used only by the store/db internal package whch
handle converting these types to their DB-equivalent values. This change
should allow reports to be generated significantly faster since it
allows a large portion of the computation to be shifted to the database
engines.
This commit is contained in:
Aaron Lindsay
2017-12-12 19:40:38 -05:00
parent 483adb5c56
commit a357d38eee
22 changed files with 695 additions and 201 deletions
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25
internal/handlers/gnucash.go
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@ -10,7 +10,6 @@ import (
"io"
"log"
"math"
"math/big"
"net/http"
"time"
)
@ -49,7 +48,7 @@ func (gc *GnucashCommodity) UnmarshalXML(d *xml.Decoder, start xml.StartElement)
gc.Precision = template.Precision
} else {
if gxc.Fraction > 0 {
gc.Precision = int(math.Ceil(math.Log10(float64(gxc.Fraction))))
gc.Precision = uint64(math.Ceil(math.Log10(float64(gxc.Fraction))))
} else {
gc.Precision = 0
}
@ -178,13 +177,14 @@ func ImportGnucash(r io.Reader) (*GnucashImport, error) {
p.CurrencyId = currency.SecurityId
p.Date = price.Date.Date.Time
var r big.Rat
_, ok = r.SetString(price.Value)
if ok {
p.Value = r.FloatString(currency.Precision)
} else {
_, ok = p.Value.SetString(price.Value)
if !ok {
return nil, fmt.Errorf("Can't set price value: %s", price.Value)
}
if p.Value.Precision() > currency.Precision {
// TODO we're possibly losing data here... but do we care?
p.Value.Round(currency.Precision)
}
p.RemoteId = "gnucash:" + price.Id
gncimport.Prices = append(gncimport.Prices, p)
@ -293,13 +293,13 @@ func ImportGnucash(r io.Reader) (*GnucashImport, error) {
s.Number = gt.Number
s.Memo = gs.Memo
var r big.Rat
_, ok = r.SetString(gs.Amount)
if ok {
s.Amount = r.FloatString(security.Precision)
} else {
_, ok = s.Amount.SetString(gs.Amount)
if !ok {
return nil, fmt.Errorf("Can't set split Amount: %s", gs.Amount)
}
if s.Amount.Precision() > security.Precision {
return nil, fmt.Errorf("Imported price's precision (%d) is greater than the security's (%s)\n", s.Amount.Precision(), security)
}
t.Splits = append(t.Splits, s)
}
@ -356,6 +356,7 @@ func GnucashImportHandler(r *http.Request, context *Context) ResponseWriterWrite
}
if err != nil {
log.Print(err)
return NewError(3 /*Invalid Request*/)
}