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reflect.go
76 lines (59 loc) · 1.5 KB
/
reflect.go
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package result
import (
"fmt"
"reflect"
"github.com/pkg/errors"
"admini.dev/admini/app/lib/schema/field"
)
func FromReflection(title string, t ...any) (*Result, error) {
if len(t) == 0 {
return nil, errors.New("empty input when building result")
}
first := t[0]
q := fmt.Sprintf("built from [%T]", first)
fields, err := getFields(first)
if err != nil {
return nil, errors.Wrapf(err, "unable to calculate fields for [%T]", first)
}
data := make([][]any, 0, len(t))
for _, x := range t {
v, err := getValues(x)
if err != nil {
return nil, errors.Wrap(err, "")
}
data = append(data, v)
}
timing := &Timing{}
ret := &Result{Title: title, Count: len(t), Query: q, Fields: fields, Data: data, Timing: timing}
return ret, nil
}
func getValues(x any) ([]any, error) {
return valuesOf(reflect.ValueOf(x))
}
func valuesOf(v reflect.Value) ([]any, error) {
if v.Kind() == reflect.Ptr {
return valuesOf(v.Elem())
}
t := v.Type()
ret := make([]any, 0, t.NumField())
for i := 0; i < t.NumField(); i++ {
f := v.Field(i)
ret = append(ret, f.Interface())
}
return ret, nil
}
func getFields(x any) (field.Fields, error) {
return fieldsOf(reflect.ValueOf(x))
}
func fieldsOf(v reflect.Value) (field.Fields, error) {
if v.Kind() == reflect.Ptr {
return fieldsOf(v.Elem())
}
t := v.Type()
ret := make(field.Fields, 0, t.NumField())
for i := 0; i < t.NumField(); i++ {
f := t.Field(i)
ret = append(ret, field.NewFieldByType(f.Name, f.Type, !v.CanSet(), nil))
}
return ret, nil
}