57 lines
1012 B
Go
57 lines
1012 B
Go
package ledger
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import (
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"bufio"
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"bytes"
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"fmt"
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"io"
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"os"
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"strconv"
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)
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type BPIs string
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type BPI map[string]float64
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func NewBPIs(p string) (BPIs, error) {
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bpis := BPIs(p)
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_, err := bpis.values()
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return bpis, err
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}
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func (bpis BPIs) values() (map[Currency]BPI, error) {
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f, err := os.Open(string(bpis))
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if os.IsNotExist(err) {
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return nil, nil
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}
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if err != nil {
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return nil, err
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}
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defer f.Close()
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result := make(map[Currency]BPI)
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r := bufio.NewReader(f)
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for {
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line, err := readTransactionLine(r)
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if len(line) > 0 {
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fields := bytes.Fields(line)
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if len(fields) > 3 {
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date := fields[1]
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currency := fields[len(fields)-2]
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value, err := strconv.ParseFloat(string(fields[len(fields)-1][1:]), 64)
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if err != nil {
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return nil, err
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}
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return nil, fmt.Errorf("what do with %s/%s/%.2f?", date, currency, value)
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}
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return nil, fmt.Errorf("what do: %s", line)
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}
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if err == io.EOF {
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return result, nil
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} else if err != nil {
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return result, err
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}
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}
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}
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