/
slack.go
79 lines (72 loc) · 1.79 KB
/
slack.go
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
package slack
import (
"context"
"errors"
"fmt"
"github.com/nlopes/slack"
)
// Client Slack bot client.
// needed scopes: chat:write, channels:read, groups:read, im:read, mpim:read
type Client interface {
SendMessage(msg string) error
}
// New creates a new instance. Needs the bot token and the channel name
func New(token string, channel string) (Client, error) {
slackClient := slack.New(token)
if _, err := slackClient.AuthTest(); err != nil {
return nil, err
}
var slackChannelID string
var cursor string
for {
var err error
var channels []slack.Channel
// needed scopes:
channels, cursor, err = slackClient.GetConversations(&slack.GetConversationsParameters{
ExcludeArchived: "true",
Limit: 1000,
Types: []string{"public_channel", "private_channel"},
Cursor: cursor,
})
if err != nil {
return nil, fmt.Errorf("error getting channel ids from slack. error: %v", err)
}
if len(channels) == 0 {
return nil, fmt.Errorf("error getting channel ids from slack")
}
for _, c := range channels {
if c.Name == channel {
slackChannelID = c.ID
break
}
}
if slackChannelID != "" {
break
}
}
if slackChannelID == "" {
return nil, fmt.Errorf("error finding slack channel %s", channel)
}
return &client{
slackChannelID: slackChannelID,
slackClient: slackClient,
}, nil
}
type client struct {
slackChannelID string
slackClient *slack.Client
}
// SendMessage sends a message to thr slack channel
func (c *client) SendMessage(msg string) error {
if c.slackChannelID == "" {
return errors.New("no channel found")
}
if _, _, err := c.slackClient.PostMessageContext(context.Background(),
c.slackChannelID,
slack.MsgOptionText(msg, false),
slack.MsgOptionAsUser(false),
); err != nil {
return err
}
return nil
}