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
|
package slack
import (
"encoding/json"
"errors"
"time"
"golang.org/x/net/websocket"
)
const (
// MaxMessageTextLength is the current maximum message length in number of characters as defined here
// https://api.slack.com/rtm#limits
MaxMessageTextLength = 4000
)
// RTM represents a managed websocket connection. It also supports
// all the methods of the `Client` type.
//
// Create this element with Client's NewRTM().
type RTM struct {
idGen IDGenerator
pings map[int]time.Time
// Connection life-cycle
conn *websocket.Conn
IncomingEvents chan RTMEvent
outgoingMessages chan OutgoingMessage
killChannel chan bool
forcePing chan bool
rawEvents chan json.RawMessage
wasIntentional bool
isConnected bool
// Client is the main API, embedded
Client
websocketURL string
// UserDetails upon connection
info *Info
}
// NewRTM returns a RTM, which provides a fully managed connection to
// Slack's websocket-based Real-Time Messaging protocol.
func newRTM(api *Client) *RTM {
return &RTM{
Client: *api,
IncomingEvents: make(chan RTMEvent, 50),
outgoingMessages: make(chan OutgoingMessage, 20),
pings: make(map[int]time.Time),
isConnected: false,
wasIntentional: true,
killChannel: make(chan bool),
forcePing: make(chan bool),
rawEvents: make(chan json.RawMessage),
idGen: NewSafeID(1),
}
}
// Disconnect and wait, blocking until a successful disconnection.
func (rtm *RTM) Disconnect() error {
if !rtm.isConnected {
return errors.New("Invalid call to Disconnect - Slack API is already disconnected")
}
rtm.killChannel <- true
return nil
}
// Reconnect only makes sense if you've successfully disconnectd with Disconnect().
func (rtm *RTM) Reconnect() error {
logger.Println("RTM::Reconnect not implemented!")
return nil
}
// GetInfo returns the info structure received when calling
// "startrtm", holding all channels, groups and other metadata needed
// to implement a full chat client. It will be non-nil after a call to
// StartRTM().
func (rtm *RTM) GetInfo() *Info {
return rtm.info
}
// SendMessage submits a simple message through the websocket. For
// more complicated messages, use `rtm.PostMessage` with a complete
// struct describing your attachments and all.
func (rtm *RTM) SendMessage(msg *OutgoingMessage) {
if msg == nil {
rtm.Debugln("Error: Attempted to SendMessage(nil)")
return
}
rtm.outgoingMessages <- *msg
}
|
