allllmost bpi

ledger/bpi.go

@@ -1,6 +1,13 @@
 package ledger
 
-import "io"
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"strconv"
+)
 
 type BPIs string
 
@@ -13,5 +20,37 @@ func NewBPIs(p string) (BPIs, error) {
 }
 
 func (bpis BPIs) values() (map[Currency]BPI, error) {
-	return nil, io.EOF
+	f, err := os.Open(string(bpis))
+	if os.IsNotExist(err) {
+		return nil, nil
+	}
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	result := make(map[Currency]BPI)
+
+	r := bufio.NewReader(f)
+	for {
+		line, err := readTransactionLine(r)
+		if len(line) > 0 {
+			fields := bytes.Fields(line)
+			if len(fields) > 3 {
+				date := fields[1]
+				currency := fields[len(fields)-2]
+				value, err := strconv.ParseFloat(string(fields[len(fields)-1][1:]), 64)
+				if err != nil {
+					return nil, err
+				}
+				return nil, fmt.Errorf("what do with %s/%s/%.2f?", date, currency, value)
+			}
+			return nil, fmt.Errorf("what do: %s", line)
+		}
+		if err == io.EOF {
+			return result, nil
+		} else if err != nil {
+			return result, err
+		}
+	}
 }