json.gno

 1package profiles
 2
 3import (
 4	"strconv"
 5	"strings"
 6)
 7
 8// ProfileJSON is the profile of an address, or null when it has none yet:
 9//
10//	{"addr","name","rank","gamesPlayed","victoryPoints","createdAt"}
11//
12// name is the address's name in gno.land/r/sys/users, "" if none.
13func ProfileJSON(addr string) string {
14	v := profiles.Get(addr)
15	if v == nil {
16		return "null"
17	}
18	p := v.(*Profile)
19	var b strings.Builder
20	writeProfile(&b, p, rankOf(p))
21	return b.String()
22}
23
24// PlayersJSON is one page of the ranking, best first, count at most
25// MaxPage:
26//
27//	{"total","offset","players":[profile...]}
28func PlayersJSON(offset, count int) string {
29	if offset < 0 {
30		offset = 0
31	}
32	if count < 0 {
33		count = 0
34	}
35	if count > MaxPage {
36		count = MaxPage
37	}
38	var b strings.Builder
39	b.WriteString(`{"total":` + strconv.Itoa(ranking.Size()))
40	b.WriteString(`,"offset":` + strconv.Itoa(offset))
41	b.WriteString(`,"players":[`)
42	i := 0
43	ranking.IterateByOffset(offset, count, func(_ string, v any) bool {
44		if i > 0 {
45			b.WriteByte(',')
46		}
47		writeProfile(&b, v.(*Profile), offset+i+1)
48		i++
49		return false
50	})
51	b.WriteString("]}")
52	return b.String()
53}
54
55func writeProfile(b *strings.Builder, p *Profile, rank int) {
56	b.WriteString(`{"addr":` + quote(p.Addr.String()))
57	b.WriteString(`,"name":` + quote(Name(p.Addr)))
58	b.WriteString(`,"rank":` + strconv.Itoa(rank))
59	b.WriteString(`,"gamesPlayed":` + strconv.Itoa(p.GamesPlayed))
60	b.WriteString(`,"victoryPoints":` + strconv.Itoa(p.VictoryPoints))
61	b.WriteString(`,"createdAt":` + strconv.FormatInt(p.CreatedAt.Unix(), 10))
62	b.WriteByte('}')
63}
64
65// quote encodes s as a JSON string.
66func quote(s string) string {
67	var b strings.Builder
68	b.WriteByte('"')
69	for i := 0; i < len(s); i++ {
70		c := s[i]
71		switch {
72		case c == '"' || c == '\\':
73			b.WriteByte('\\')
74			b.WriteByte(c)
75		case c == '\n':
76			b.WriteString(`\n`)
77		case c == '\r':
78			b.WriteString(`\r`)
79		case c == '\t':
80			b.WriteString(`\t`)
81		case c < 0x20:
82			b.WriteString(`\u00`)
83			b.WriteByte("0123456789abcdef"[c>>4])
84			b.WriteByte("0123456789abcdef"[c&0xf])
85		default:
86			b.WriteByte(c)
87		}
88	}
89	b.WriteByte('"')
90	return b.String()
91}