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
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
package channel
import (
"citrons.xyz/talk/proto"
"citrons.xyz/talk/server/object"
"citrons.xyz/talk/server/session"
"citrons.xyz/talk/server/validate"
"citrons.xyz/talk/server/user"
)
type ChannelStore struct {
world *object.World
byName map[string]*Channel
deleted map[string]Tombstone
}
type Channel struct {
store *ChannelStore
id string
name string
members map[string]Membership
messages []proto.Object
byId map[string]int
defaultMembership Membership
Stream session.Stream
}
type Tombstone struct {
name string
}
func NewStore(world *object.World) *ChannelStore {
return &ChannelStore {
world, make(map[string]*Channel), make(map[string]Tombstone),
}
}
func (cs *ChannelStore) CreateChannel(name string) (*Channel, *proto.Fail) {
if cs.ByName(name) != nil {
return nil, &proto.Fail {
"name-taken", "", map[string]string {"": name},
}
}
if !validate.Name(name) {
return nil, &proto.Fail {
"invalid-name", "", map[string]string {"": name},
}
}
var c Channel
c.store = cs
c.name = name
c.members = make(map[string]Membership)
c.byId = make(map[string]int)
c.defaultMembership = DefaultMembership
cs.byName[validate.Fold(name)] = &c
c.id = cs.world.NewObject(&c)
return &c, nil
}
func (cs *ChannelStore) ByName(name string) *Channel {
return cs.byName[validate.Fold(name)]
}
func (c *Channel) Name() string {
return c.name
}
func (c *Channel) Id() string {
return c.id
}
func (c *Channel) Rename(name string) *proto.Fail {
if !validate.Name(name) {
return &proto.Fail {
"invalid-name", "", map[string]string {"": name},
}
}
if validate.Fold(name) == validate.Fold(c.name) {
c.name = name
return nil
}
if c.store.ByName(name) != nil {
return &proto.Fail {
"name-taken", "", map[string]string {"": name},
}
}
c.store.byName[validate.Fold(c.name)] = nil
c.store.byName[validate.Fold(name)] = c
c.name = name
return nil
}
func (c *Channel) Put(m proto.Object) proto.Object {
m.Id = proto.GenId()
m.Fields["t"] = proto.Timestamp()
c.byId[m.Id] = len(c.messages)
c.messages = append(c.messages, m)
for s, _ := range c.Stream.Subscribers() {
if m.Fields["f"] == s.UserId {
continue
}
if c.members[s.UserId].See {
s.Event(proto.NewCmd("p", c.id, m))
}
}
return m
}
func (c *Channel) prune() {
for m, _ := range c.members {
switch c.store.world.GetObject(m).(type) {
case *user.User:
default:
delete(c.members, m)
}
}
}
func (c *Channel) Join(u *user.User) *proto.Fail {
if c.members[u.Id()].Yes {
return nil
}
c.members[u.Id()] = c.defaultMembership
u.Channels[c.id] = true
c.Put(proto.Object{"join", "", map[string]string {"": u.Id()}})
return nil
}
func (c *Channel) Leave(u *user.User) *proto.Fail {
if !c.members[u.Id()].Yes {
return nil
}
delete(c.members, u.Id())
delete(u.Channels, c.id)
c.Put(proto.Object{"leave", "", map[string]string {"": u.Id()}})
return nil
}
func (c *Channel) Members() map[string]Membership {
c.prune()
return c.members
}
func (c *Channel) SetMembership(u *user.User, m Membership) {
if c.members[u.Id()].Yes {
c.members[u.Id()] = m
}
}
func (c *Channel) Delete() {
c.Stream.Event(proto.NewCmd("delete", c.id))
c.Stream.UnsubscribeAll()
for m, _ := range c.members {
switch u := c.store.world.GetObject(m).(type) {
case *user.User:
u.Channels[c.id] = false
default:
}
}
delete(c.store.byName, validate.Fold(c.name))
c.store.world.RemoveObject(c.id)
deleted := Tombstone {c.name}
c.store.deleted[c.id] = deleted
c.store.world.PutObject(c.id, deleted)
}
func (c *Channel) GetInfo() proto.Object {
return proto.Object {
"channel", c.id, map[string]string {"": c.name},
}
}
func (t Tombstone) GetInfo() proto.Object {
return proto.Object {
"gone", "", map[string]string {"": t.name, "kind": "channel"},
}
}
|
