add a csv printer

cmd/any2anexoj-cli/csv_writer.go

@@ -0,0 +1,57 @@
+package main
+
+import (
+	"encoding/csv"
+	"fmt"
+	"io"
+
+	"github.com/nmoniz/any2anexoj/internal"
+)
+
+type CSVWriter struct {
+	w *csv.Writer
+}
+
+func NewCSVWriter(w io.Writer) *CSVWriter {
+	return &CSVWriter{w: csv.NewWriter(w)}
+}
+
+func (cw *CSVWriter) Render(aw *internal.AggregatorWriter) error {
+	err := cw.w.Write([]string{
+		"source_country", "code",
+		"realization_year", "realization_month", "realization_day", "realization_value",
+		"acquisition_year", "acquisition_month", "acquisition_day", "acquisition_value",
+		"expenses", "foreign_tax_paid", "counter_country",
+	})
+	if err != nil {
+		return fmt.Errorf("write csv header: %w", err)
+	}
+
+	for ri := range aw.Iter() {
+		err := cw.w.Write(reportItemToRow(ri))
+		if err != nil {
+			return fmt.Errorf("write csv row: %w", err)
+		}
+	}
+
+	cw.w.Flush()
+	return cw.w.Error()
+}
+
+func reportItemToRow(ri internal.ReportItem) []string {
+	return []string{
+		fmt.Sprintf("%d", ri.AssetCountry),
+		string(ri.Nature),
+		fmt.Sprintf("%d", ri.SellTimestamp.Year()),
+		fmt.Sprintf("%d", int(ri.SellTimestamp.Month())),
+		fmt.Sprintf("%d", ri.SellTimestamp.Day()),
+		ri.SellValue.StringFixed(2),
+		fmt.Sprintf("%d", ri.BuyTimestamp.Year()),
+		fmt.Sprintf("%d", int(ri.BuyTimestamp.Month())),
+		fmt.Sprintf("%d", ri.BuyTimestamp.Day()),
+		ri.BuyValue.StringFixed(2),
+		ri.Fees.StringFixed(2),
+		ri.Taxes.StringFixed(2),
+		fmt.Sprintf("%d", ri.BrokerCountry),
+	}
+}