amount to float

ledger_test.go

@@ -19,7 +19,7 @@ func TestLedgerTransactions(t *testing.T) {
 		Description: "Qt needs pizza n kodiak",
 		Payee:       "Withdrawal:Home:Grocery+Resturaunt:Target",
 		Payer:       "Debts:Credit:ChaseAarpChaseVisa",
-		Amount:      "$37.86",
+		Amount:      37.86,
 	}); transactions[0] != want {
 		t.Fatalf("want \n\t%+v, got \n\t%+v", want, transactions[0])
 	}
@@ -28,7 +28,7 @@ func TestLedgerTransactions(t *testing.T) {
 		Description: "Testing detecting deposits via email alerts 5421705162",
 		Payer:       "AssetAccount:Cash:Uccu",
 		Payee:       "Debts:Credit:ChaseAarpChaseVisa",
-		Amount:      "$100.00",
+		Amount:      100.00,
 	}); transactions[1] != want {
 		t.Fatalf("want \n\t%+v, got \n\t%+v", want, transactions[1])
 	}

transaction.go

@@ -5,6 +5,7 @@ import (
 	"bytes"
 	"fmt"
 	"io"
+	"strconv"
 	"strings"
 )
 
@@ -13,7 +14,7 @@ type Transaction struct {
 	Description string
 	Payer       string
 	Payee       string
-	Amount      string
+	Amount      float32
 }
 
 func readTransaction(r io.Reader) (Transaction, error) {
@@ -83,29 +84,31 @@ func (transaction *Transaction) readDescription(lines [][]byte) error {
 	return nil
 }
 
+func (transaction *Transaction) readAmount(lines [][]byte) error {
+	amount := string(words(lines[1])[1])
+	f, err := strconv.ParseFloat(strings.Trim(amount, "$"), 32)
+	transaction.Amount = float32(f)
+	return err
+}
+
 func (transaction *Transaction) readPayerPayee(lines [][]byte) error {
 	payer := string(words(lines[1])[0])
 	payee := string(words(lines[2])[0])
-	if !strings.Contains(transaction.Amount, "-") {
+	if transaction.Amount >= 0 {
 		tmp := payer
 		payer = payee
 		payee = tmp
 	} else {
-		transaction.Amount = strings.ReplaceAll(transaction.Amount, "-", "")
+		transaction.Amount *= -1
 	}
 	transaction.Payer = payer
 	transaction.Payee = payee
 	return nil
 }
 
-func (transaction *Transaction) readAmount(lines [][]byte) error {
-	transaction.Amount = string(words(lines[1])[1])
-	return nil
-}
-
 func (transaction Transaction) Marshal() string {
 	return fmt.Sprintf(
-		"%-25s%s\n%25s%-50s%s\n%25s%s",
+		"%-25s%s\n%25s%-50s%.2f\n%25s%s",
 		transaction.Date,
 		transaction.Description,
 		"",

transaction_test.go

@@ -73,7 +73,7 @@ func TestReadTransaction(t *testing.T) {
 				Date:        "2021-07-01",
 				Description: "description",
 				Payee:       "payee",
-				Amount:      "$1.00",
+				Amount:      1.00,
 				Payer:       "payer",
 			},
 		},