56 lines
1.0 KiB
Go
56 lines
1.0 KiB
Go
package main
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import (
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"bytes"
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"errors"
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"fmt"
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"io"
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"io/ioutil"
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"os"
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)
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type Ledger struct {
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path string
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}
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func NewLedger(path string) (Ledger, error) {
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info, err := os.Stat(path)
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if err == nil && info.IsDir() {
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return Ledger{}, errors.New("path is dir")
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}
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return Ledger{
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path: path,
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}, err
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}
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func (ledger Ledger) Transactions() ([]Transaction, error) {
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f, err := ledger.open()
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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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transactions := make([]Transaction, 0)
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for err == nil {
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var transaction Transaction
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transaction, err = readTransaction(f)
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if err == io.EOF {
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} else if err == nil {
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transactions = append(transactions, transaction)
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} else {
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err = fmt.Errorf("error parsing transaction #%d: %v", len(transactions), err)
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}
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}
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if err == io.EOF {
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err = nil
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}
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return transactions, err
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}
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func (ledger Ledger) open() (io.ReadCloser, error) {
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f, err := os.Open(ledger.path)
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if os.IsNotExist(err) {
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return ioutil.NopCloser(bytes.NewReader([]byte{})), nil
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}
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return f, err
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}
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