github.com/openimsdk/tools@v0.0.49/errs/error.go (about) 1 // Copyright © 2024 OpenIM open source community. All rights reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package errs 16 17 import ( 18 "bytes" 19 "fmt" 20 ) 21 22 type Error interface { 23 Is(err error) bool 24 Wrap() error 25 WrapMsg(msg string, kv ...any) error 26 error 27 } 28 29 func New(s string, kv ...any) Error { 30 return &errorString{ 31 s: toString(s, kv), 32 } 33 } 34 35 type errorString struct { 36 s string 37 } 38 39 func (e *errorString) Is(err error) bool { 40 if err == nil { 41 return false 42 } 43 t, ok := err.(*errorString) 44 return ok && e.s == t.s 45 } 46 47 func (e *errorString) Error() string { 48 return e.s 49 } 50 51 func (e *errorString) Wrap() error { 52 return Wrap(e) 53 } 54 55 func (e *errorString) WrapMsg(msg string, kv ...any) error { 56 return WrapMsg(e, msg, kv...) 57 } 58 59 func toString(s string, kv []any) string { 60 if len(kv) == 0 { 61 return s 62 } else { 63 var buf bytes.Buffer 64 buf.WriteString(s) 65 66 for i := 0; i < len(kv); i += 2 { 67 if buf.Len() > 0 { 68 buf.WriteString(", ") 69 } 70 71 key := fmt.Sprintf("%v", kv[i]) 72 buf.WriteString(key) 73 buf.WriteString("=") 74 75 if i+1 < len(kv) { 76 value := fmt.Sprintf("%v", kv[i+1]) 77 buf.WriteString(value) 78 } else { 79 buf.WriteString("MISSING") 80 } 81 } 82 return buf.String() 83 } 84 }