refactor: Decompose logger completely

internal/logging/csv.go

@@ -0,0 +1,44 @@
+package logging
+
+import (
+	"encoding/csv"
+	"fmt"
+	"os"
+	"time"
+
+	models "github.com/pojntfx/stfs/internal/db/sqlite/models/metadata"
+)
+
+var (
+	tarHeaderCSV = []string{
+		"record", "lastknownrecord", "block", "lastknownblock", "typeflag", "name", "linkname", "size", "mode", "uid", "gid", "uname", "gname", "modtime", "accesstime", "changetime", "devmajor", "devminor", "paxrecords", "format",
+	}
+)
+
+func headerToCSV(hdr *models.Header) []string {
+	return []string{
+		fmt.Sprintf("%v", hdr.Record), fmt.Sprintf("%v", hdr.Lastknownrecord), fmt.Sprintf("%v", hdr.Block), fmt.Sprintf("%v", hdr.Lastknownblock), fmt.Sprintf("%v", hdr.Typeflag), hdr.Name, hdr.Linkname, fmt.Sprintf("%v", hdr.Size), fmt.Sprintf("%v", hdr.Mode), fmt.Sprintf("%v", hdr.UID), fmt.Sprintf("%v", hdr.Gid), fmt.Sprintf("%v", hdr.Uname), fmt.Sprintf("%v", hdr.Gname), hdr.Modtime.Format(time.RFC3339), hdr.Accesstime.Format(time.RFC3339), hdr.Changetime.Format(time.RFC3339), fmt.Sprintf("%v", hdr.Devmajor), fmt.Sprintf("%v", hdr.Devminor), fmt.Sprintf("%v", hdr.Paxrecords), fmt.Sprintf("%v", hdr.Format),
+	}
+}
+
+type Logger struct {
+	n int
+}
+
+func NewLogger() *Logger {
+	return &Logger{}
+}
+
+func (l *Logger) PrintHeader(hdr *models.Header) {
+	w := csv.NewWriter(os.Stdout)
+
+	if l.n <= 0 {
+		_ = w.Write(tarHeaderCSV) // Errors are ignored for compatibility with traditional logging APIs
+	}
+
+	_ = w.Write(headerToCSV(hdr)) // Errors are ignored for compatibility with traditional logging APIs
+
+	w.Flush()
+
+	l.n++
+}