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error.go
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error.go
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// Copyright © 2024 OpenIM open source community. All rights reserved.
//
// 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 errs
import (
"bytes"
"fmt"
)
type Error interface {
Is(err error) bool
Wrap() error
WrapMsg(msg string, kv ...any) error
error
}
func New(s string, kv ...any) Error {
return &errorString{
s: toString(s, kv),
}
}
type errorString struct {
s string
}
func (e *errorString) Is(err error) bool {
if err == nil {
return false
}
t, ok := err.(*errorString)
return ok && e.s == t.s
}
func (e *errorString) Error() string {
return e.s
}
func (e *errorString) Wrap() error {
return Wrap(e)
}
func (e *errorString) WrapMsg(msg string, kv ...any) error {
return WrapMsg(e, msg, kv...)
}
func toString(s string, kv []any) string {
if len(kv) == 0 {
return s
} else {
var buf bytes.Buffer
buf.WriteString(s)
for i := 0; i < len(kv); i += 2 {
if buf.Len() > 0 {
buf.WriteString(", ")
}
key := fmt.Sprintf("%v", kv[i])
buf.WriteString(key)
buf.WriteString("=")
if i+1 < len(kv) {
value := fmt.Sprintf("%v", kv[i+1])
buf.WriteString(value)
} else {
buf.WriteString("MISSING")
}
}
return buf.String()
}
}