Add errors utils

internal/util/errors.go

@@ -0,0 +1,56 @@
+// Copyright 2019 Sorint.lab
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package util
+
+import (
+	"strings"
+)
+
+type Errors struct {
+	Errs []error
+}
+
+func (e *Errors) IsErr() bool {
+	return len(e.Errs) > 0
+}
+
+func (e *Errors) Append(err error) {
+	e.Errs = append(e.Errs, err)
+}
+
+func (e *Errors) Error() string {
+	errs := []string{}
+	for _, err := range e.Errs {
+		errs = append(errs, err.Error())
+	}
+	return strings.Join(errs, ", ")
+}
+
+func (e *Errors) Equal(e2 error) bool {
+	errs1 := []string{}
+	errs2 := []string{}
+	for _, err := range e.Errs {
+		errs1 = append(errs1, err.Error())
+	}
+	if es2, ok := e2.(*Errors); ok {
+		for _, err := range es2.Errs {
+			errs2 = append(errs2, err.Error())
+		}
+	} else {
+		errs2 = append(errs2, e2.Error())
+	}
+
+	return CompareStringSliceNoOrder(errs1, errs2)
+}