♻️ Use defined errors

models/entry.go

@@ -29,12 +29,12 @@ func (e Entry) getFieldMarshalChan() chan metaRes {
 	// @todo figure out a way to handle json field
 	for i := 0; i < size; i++ {
 		wg.Add(1)
-		go func(i int) {
+		go func(m Meta) {
 			defer wg.Done()
-			o, er := e.Fields[i].MarshalText()
+			o, er := m.MarshalText()
 			ch <- metaRes{o, er}
 
-		}(i)
+		}(e.Fields[i])
 	}
 
 	go func() {
@@ -47,10 +47,10 @@ func (e Entry) getFieldMarshalChan() chan metaRes {
 func (e Entry) MarshalText() ([]byte, error) {
 	e.Title = strings.TrimSpace(e.Title)
 	if e.Title == "" {
-		return []byte{}, errors.New("Empty title")
+		return []byte{}, ErrorMissingTitle
 	}
 	if e.Date == (time.Time{}) {
-		return []byte{}, errors.New("Empty date")
+		return []byte{}, ErrorMissingDate
 	}
 	ch := e.getFieldMarshalChan()
 	buff := &bytes.Buffer{}