1package serde
 2
 3import (
 4	"io"
 5	"reflect"
 6
 7	"github.com/google/jsonapi"
 8	"github.com/xlgmokha/x/pkg/x"
 9)
10
11func ToJSONAPI[T any](w io.Writer, item T) error {
12	if err, ok := any(item).(*jsonapi.ErrorsPayload); ok {
13		return jsonapi.MarshalErrors(w, err.Errors)
14	}
15
16	if x.IsSlice[T](item) {
17		firstItem := reflect.TypeOf(item).Elem()
18		if firstItem.Kind() == reflect.Pointer {
19			return jsonapi.MarshalPayload(w, item)
20		}
21
22		sliceValue := reflect.ValueOf(item)
23		slice := reflect.MakeSlice(reflect.SliceOf(reflect.PointerTo(firstItem)), 0, sliceValue.Len())
24		for i := 0; i < sliceValue.Len(); i++ {
25			slice = reflect.Append(slice, sliceValue.Index(i).Addr())
26		}
27		return jsonapi.MarshalPayload(w, slice.Interface())
28	}
29
30	if x.IsPtr(item) {
31		return jsonapi.MarshalPayload(w, item)
32	}
33	return jsonapi.MarshalPayload(w, &item)
34}
35
36func FromJSONAPI[T any](reader io.Reader) (T, error) {
37	item := x.Default[T]()
38	if _, ok := any(item).(*jsonapi.ErrorsPayload); ok {
39		return FromJSON[T](reader)
40	}
41	if x.IsSlice[T](item) {
42		sliceType := reflect.TypeOf(item).Elem()
43
44		items, err := jsonapi.UnmarshalManyPayload(reader, sliceType)
45		if err != nil {
46			return item, err
47		}
48		slice := reflect.MakeSlice(reflect.SliceOf(sliceType), 0, len(items))
49		for _, item := range items {
50			slice = reflect.Append(slice, reflect.ValueOf(item))
51		}
52		return slice.Interface().(T), err
53	}
54
55	if x.IsPtr(item) {
56		return item, jsonapi.UnmarshalPayload(reader, item)
57	}
58	return item, jsonapi.UnmarshalPayload(reader, &item)
59}