beer.go

1	package main
2
3	import (
4	"encoding/json"
5	"strconv"
6	"time"
7	)
8
9	type Beer struct {
10	Brand string `json:"brand"`
11	Package string `json:"package"`
12	Delivered time.Time `json:"delivered"`
13	Expires time.Time `json:"expires"`
14	}
15
16	func (b *Beer) UnmarshalJSON(data []byte) error {
17	var objmap map[string]json.RawMessage
18	err := json.Unmarshal(data, &objmap)
19	if err != nil {
20	return err
21	}
22	for key, value := range objmap {
23	if key == "brand" {
24	err = json.Unmarshal(value, &b.Brand)
25	if err != nil {
26	return err
27	}
28	} else if key == "package" {
29	err = json.Unmarshal(value, &b.Package)
30	if err != nil {
31	return err
32	}
33	} else if key == "delivered" {
34	var delivered string
35	err = json.Unmarshal(value, &delivered)
36	if err != nil {
37	return err
38	}
39	deliveredSeconds, err := strconv.ParseInt(delivered, 10, 64)
40	if err != nil {
41	return err
42	}
43	b.Delivered = time.Unix(deliveredSeconds, 0)
44	} else if key == "expires" {
45	var expires string
46	err = json.Unmarshal(value, &expires)
47	if err != nil {
48	return err
49	}
50	expiresSeconds, err := strconv.ParseInt(expires, 10, 64)
51	if err != nil {
52	return err
53	}
54	b.Expires = time.Unix(expiresSeconds, 0)
55	}
56	}
57	return nil
58	}