♻️ Use defined errors

models/errors.go

@@ -0,0 +1,14 @@
+package models
+
+import (
+	"errors"
+	"fmt"
+)
+
+var ErrorMissingTitle = errors.New("Missing title")
+var ErrorMissingDate = errors.New("Missing date")
+var ErrorParsing = errors.New("Parsing Error")
+
+func newParsingError(err error) error {
+	return fmt.Errorf("%w: %w", ErrorParsing, err)
+}