code error

pkg/errs/code.go

@@ -48,7 +48,7 @@ const (
 
 	// 群组错误码
 	GroupIDNotFoundError     = 1201 //GroupID不存在
-	GroupIDIDExisted         = 1202 //GroupID已存在
+	GroupIDExisted           = 1202 //GroupID已存在
 	OnlyOneOwnerError        = 1203 //只能有一个群主
 	InGroupAlreadyError      = 1204 //已在群组中
 	NotInGroupYetError       = 1205 //不在群组中

pkg/errs/coderr.go

@@ -11,7 +11,8 @@ type CodeError interface {
 	Msg() string
 	Detail() string
 	WithDetail(detail string) CodeError
-	Is(err error) bool
+	// Is 判断是否是某个错误, loose为false时, 只有错误码相同就认为是同一个错误, 默认为true
+	Is(err error, loose ...bool) bool
 	Wrap(msg ...string) error
 	error
 }
@@ -59,13 +60,23 @@ func (e *codeError) Wrap(w ...string) error {
 	return errors.Wrap(e, strings.Join(w, ", "))
 }
 
-func (e *codeError) Is(err error) bool {
+func (e *codeError) Is(err error, loose ...bool) bool {
 	if err == nil {
 		return false
 	}
+	var allowSubclasses bool
+	if len(loose) == 0 {
+		allowSubclasses = true
+	} else {
+		allowSubclasses = loose[0]
+	}
 	codeErr, ok := Unwrap(err).(CodeError)
 	if ok {
-		return codeErr.Code() == e.code
+		if allowSubclasses {
+			return Relation.Is(e.code, codeErr.Code())
+		} else {
+			return codeErr.Code() == e.code
+		}
 	}
 	return false
 }

pkg/errs/predefine.go

@@ -12,7 +12,7 @@ var (
 
 	ErrUserIDNotFound  = NewCodeError(UserIDNotFoundError, "UserIDNotFoundError")
 	ErrGroupIDNotFound = NewCodeError(GroupIDNotFoundError, "GroupIDNotFoundError")
-	ErrGroupIDExisted  = NewCodeError(GroupIDIDExisted, "GroupIDExisted")
+	ErrGroupIDExisted  = NewCodeError(GroupIDExisted, "GroupIDExisted")
 	ErrUserIDExisted   = NewCodeError(UserIDExisted, "UserIDExisted")
 
 	ErrRecordNotFound = NewCodeError(RecordNotFoundError, "RecordNotFoundError")

pkg/errs/relation.go

@@ -0,0 +1,43 @@
+package errs
+
+var Relation = &relation{m: make(map[int]map[int]struct{})}
+
+func init() {
+	Relation.Add(RecordNotFoundError, UserIDNotFoundError)
+	Relation.Add(RecordNotFoundError, GroupIDNotFoundError)
+	Relation.Add(DuplicateKeyError, UserIDExisted)
+	Relation.Add(DuplicateKeyError, GroupIDExisted)
+}
+
+type relation struct {
+	m map[int]map[int]struct{}
+}
+
+func (r *relation) Add(codes ...int) {
+	if len(codes) < 2 {
+		panic("codes length must be greater than 2")
+	}
+	for i := 1; i < len(codes); i++ {
+		parent := codes[i-1]
+		s, ok := r.m[parent]
+		if !ok {
+			s = make(map[int]struct{})
+			r.m[parent] = s
+		}
+		for _, code := range codes[i:] {
+			s[code] = struct{}{}
+		}
+	}
+}
+
+func (r *relation) Is(parent, child int) bool {
+	if parent == child {
+		return true
+	}
+	s, ok := r.m[parent]
+	if !ok {
+		return false
+	}
+	_, ok = s[child]
+	return ok
+}