74 lines
1.5 KiB
Go
74 lines
1.5 KiB
Go
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package errs
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import (
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"errors"
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"backend/pkg/library/errors/code"
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"google.golang.org/grpc/status"
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)
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func newBuiltinGRPCErr(scope, detail uint32, msg string) *Error {
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return &Error{
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category: uint32(code.CatGRPC),
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detail: detail,
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scope: scope,
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msg: msg,
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}
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}
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// FromError tries to let error as Err
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// it supports to unwrap error that has Error
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// return nil if failed to transfer
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func FromError(err error) *Error {
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if err == nil {
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return nil
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}
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var e *Error
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if errors.As(err, &e) {
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return e
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}
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return nil
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}
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// FromCode parses code as following 8 碼
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// Decimal: 10201000
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// 10 represents Scope
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// 201 represents Category
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// 000 represents Detail error code
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func FromCode(code uint32) *Error {
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const CodeMultiplier = 1000000
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const SubMultiplier = 1000
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// 獲取 scope，前兩位數
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scope := code / CodeMultiplier
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// 獲取 detail，最後三位數
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detail := code % SubMultiplier
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// 獲取 category，中間三位數
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category := (code / SubMultiplier) % SubMultiplier
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return &Error{
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category: category,
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detail: detail,
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scope: scope,
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msg: "",
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}
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}
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// FromGRPCError transfer error to Err
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// useful for gRPC client
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func FromGRPCError(err error) *Error {
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s, _ := status.FromError(err)
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e := FromCode(uint32(s.Code()))
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e.msg = s.Message()
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// For GRPC built-in code
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if e.Scope() == uint32(code.Unset) && e.Category() == 0 && e.Code() != code.OK {
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e = newBuiltinGRPCErr(uint32(Scope), e.detail, s.Message()) // Note: detail is now 3-digit, but built-in codes are small
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}
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return e
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}
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