-
Notifications
You must be signed in to change notification settings - Fork 3
/
merge.go
55 lines (45 loc) · 1.18 KB
/
merge.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
package stick
import (
"reflect"
"time"
"github.com/imdario/mergo"
"go.mongodb.org/mongo-driver/bson/primitive"
)
// Merge will merge the specified base value with the provided values and return
// the base value.
func Merge[T any](base T, with ...T) T {
// check list
if len(with) == 0 {
return base
}
// check if already a pointer
ptr := reflect.TypeOf(base).Kind() == reflect.Ptr
// merge base with values
for _, value := range with {
var err error
if ptr {
err = mergo.Merge(base, value, mergo.WithOverride, mergo.WithTransformers(&mergeTransformer{}))
} else {
err = mergo.Merge(&base, &value, mergo.WithOverride, mergo.WithTransformers(&mergeTransformer{}))
}
if err != nil {
panic(err)
}
}
return base
}
var idType = reflect.TypeOf(primitive.ObjectID{})
var timeType = reflect.TypeOf(time.Time{})
type mergeTransformer struct{}
func (t *mergeTransformer) Transformer(typ reflect.Type) func(reflect.Value, reflect.Value) error {
// handle id and time types
if typ == idType || typ == timeType {
return func(dst reflect.Value, src reflect.Value) error {
if !src.IsZero() && dst.CanSet() {
dst.Set(src)
}
return nil
}
}
return nil
}