/
errors.go
108 lines (92 loc) · 1.97 KB
/
errors.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
package valval
import (
"fmt"
"reflect"
"strings"
)
type ErrorDescription struct {
Path string
Error error
}
type valueError []error
func (ve *valueError) Error() string {
return "invalid value"
}
type objectErrorField struct {
Name string
Err error
Tag reflect.StructTag
}
type objectError []*objectErrorField
func (oe *objectError) Error() string {
return "invalid object"
}
type sliceErrorElem struct {
Index int
Err error
}
type sliceError []*sliceErrorElem
func (se *sliceError) Error() string {
return "invalid slice"
}
func Errors(err error) []ErrorDescription {
return getErrors(err, "", "")
}
func ErrorsBase(err error, basePath string) []ErrorDescription {
return getErrors(err, basePath, "")
}
func JSONErrors(err error) []ErrorDescription {
return getErrors(err, "", "json")
}
func JSONErrorsBase(err error, basePath string) []ErrorDescription {
return getErrors(err, basePath, "json")
}
func getErrors(err error, basePath, structTag string) []ErrorDescription {
ret := []ErrorDescription{}
if err == nil {
return ret
}
switch t := err.(type) {
case *valueError:
for _, e := range *t {
ret = append(ret, ErrorDescription{
Path: basePath,
Error: e,
})
}
case *objectError:
for _, ofe := range *t {
nextBase := basePath
if nextBase != "" {
nextBase += "."
}
nextBase += fieldNameForTag(ofe, structTag)
ret = append(ret, getErrors(ofe.Err, nextBase, structTag)...)
}
case *sliceError:
for _, see := range *t {
nextBase := basePath
nextBase += fmt.Sprintf("[%d]", see.Index)
ret = append(ret, getErrors(see.Err, nextBase, structTag)...)
}
default:
ret = append(ret, ErrorDescription{
Path: basePath,
Error: t,
})
}
return ret
}
func fieldNameForTag(oef *objectErrorField, structTag string) string {
if structTag == "" {
return oef.Name
}
tag := oef.Tag.Get(structTag)
if idx := strings.Index(tag, ","); idx != -1 {
tag = tag[:idx]
}
if tag == "" {
return oef.Name
}
return tag
}