forked from keel-hq/keel
/
slack.go
296 lines (237 loc) · 6.91 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
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
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
package slack
import (
"context"
"encoding/json"
"errors"
"fmt"
"os"
"strconv"
"strings"
"time"
"github.com/nlopes/slack"
"github.com/alwinius/bow/bot"
"github.com/alwinius/bow/constants"
"github.com/alwinius/bow/version"
log "github.com/sirupsen/logrus"
)
// SlackImplementer - implementes slack HTTP functionality, used to
// send messages with attachments
type SlackImplementer interface {
PostMessage(channelID string, options ...slack.MsgOption) (string, string, error)
}
// Bot - main slack bot container
type Bot struct {
id string // bot id
name string // bot name
users map[string]string
msgPrefix string
slackClient *slack.Client
slackRTM *slack.RTM
slackHTTPClient SlackImplementer
approvalsChannel string // slack approvals channel name
ctx context.Context
botMessagesChannel chan *bot.BotMessage
approvalsRespCh chan *bot.ApprovalResponse
}
func init() {
bot.RegisterBot("slack", &Bot{})
}
func (b *Bot) Configure(approvalsRespCh chan *bot.ApprovalResponse, botMessagesChannel chan *bot.BotMessage) bool {
if os.Getenv(constants.EnvSlackToken) != "" {
b.name = "bow"
if bootName := os.Getenv(constants.EnvSlackBotName); bootName != "" {
b.name = bootName
}
token := os.Getenv(constants.EnvSlackToken)
client := slack.New(token)
b.approvalsChannel = "general"
if channel := os.Getenv(constants.EnvSlackApprovalsChannel); channel != "" {
b.approvalsChannel = strings.TrimPrefix(channel, "#")
}
b.slackClient = client
b.slackHTTPClient = client
b.approvalsRespCh = approvalsRespCh
b.botMessagesChannel = botMessagesChannel
return true
}
log.Info("bot.slack.Configure(): Slack approval bot is not configured")
return false
}
// Start - start bot
func (b *Bot) Start(ctx context.Context) error {
// setting root context
b.ctx = ctx
users, err := b.slackClient.GetUsers()
if err != nil {
return err
}
b.users = map[string]string{}
for _, user := range users {
switch user.Name {
case b.name:
if user.IsBot {
b.id = user.ID
}
default:
continue
}
}
if b.id == "" {
return errors.New("could not find bot in the list of names, check if the bot is called \"" + b.name + "\" ")
}
b.msgPrefix = strings.ToLower("<@" + b.id + ">")
go b.startInternal()
return nil
}
func (b *Bot) startInternal() error {
b.slackRTM = b.slackClient.NewRTM()
go b.slackRTM.ManageConnection()
for {
select {
case <-b.ctx.Done():
return nil
case msg := <-b.slackRTM.IncomingEvents:
switch ev := msg.Data.(type) {
case *slack.HelloEvent:
// Ignore hello
case *slack.ConnectedEvent:
// nothing to do
case *slack.MessageEvent:
b.handleMessage(ev)
case *slack.PresenceChangeEvent:
// nothing to do
case *slack.RTMError:
log.Error("Error: %s", ev.Error())
case *slack.InvalidAuthEvent:
log.Error("Invalid credentials")
return fmt.Errorf("invalid credentials")
default:
// Ignore other events..
// fmt.Printf("Unexpected: %v\n", msg.Data)
}
}
}
}
func (b *Bot) postMessage(title, message, color string, fields []slack.AttachmentField) error {
params := slack.NewPostMessageParameters()
params.Username = b.name
attachements := []slack.Attachment{
slack.Attachment{
Fallback: message,
Color: color,
Fields: fields,
Footer: fmt.Sprintf("https://bow.sh %s", version.GetbowVersion().Version),
Ts: json.Number(strconv.Itoa(int(time.Now().Unix()))),
},
}
var mgsOpts []slack.MsgOption
mgsOpts = append(mgsOpts, slack.MsgOptionPostMessageParameters(params))
mgsOpts = append(mgsOpts, slack.MsgOptionAttachments(attachements...))
_, _, err := b.slackHTTPClient.PostMessage(b.approvalsChannel, mgsOpts...)
if err != nil {
log.WithFields(log.Fields{
"error": err,
"approvals_channel": b.approvalsChannel,
}).Error("bot.postMessage: failed to send message")
}
return err
}
// checking if message was received in approvals channel
func (b *Bot) isApprovalsChannel(event *slack.MessageEvent) bool {
channel, err := b.slackClient.GetChannelInfo(event.Channel)
if err != nil {
// looking for private channel
conv, err := b.slackRTM.GetConversationInfo(event.Channel, true)
if err != nil {
log.Errorf("couldn't find amongst private conversations: %s", err)
} else if conv.Name == b.approvalsChannel {
return true
}
log.WithError(err).Errorf("channel with ID %s could not be retrieved", event.Channel)
return false
}
log.Debugf("checking if approvals channel: %s==%s", channel.Name, b.approvalsChannel)
if channel.Name == b.approvalsChannel {
return true
}
log.Debugf("message was received not on approvals channel (%s)", channel.Name)
return false
}
func (b *Bot) handleMessage(event *slack.MessageEvent) {
if event.BotID != "" || event.User == "" || event.SubType == "bot_message" {
log.WithFields(log.Fields{
"event_bot_ID": event.BotID,
"event_user": event.User,
"msg": event.Text,
"event_subtype": event.SubType,
}).Debug("handleMessage: ignoring message")
return
}
eventText := strings.Trim(strings.ToLower(event.Text), " \n\r")
if !b.isBotMessage(event, eventText) {
return
}
eventText = b.trimBot(eventText)
approval, ok := bot.IsApproval(event.User, eventText)
// only accepting approvals from approvals channel
if ok && b.isApprovalsChannel(event) {
b.approvalsRespCh <- approval
return
} else if ok {
log.WithFields(log.Fields{
"received_on": event.Channel,
"approvals_chan": b.approvalsChannel,
}).Warnf("message was received not in approvals channel: %s", event.Channel)
b.Respond(fmt.Sprintf("please use approvals channel '%s'", b.approvalsChannel), event.Channel)
return
}
b.botMessagesChannel <- &bot.BotMessage{
Message: eventText,
User: event.User,
Channel: event.Channel,
Name: "slack",
}
}
func (b *Bot) Respond(text string, channel string) {
// if message is short, replying directly via slack RTM
if len(text) < 3000 {
b.slackRTM.SendMessage(b.slackRTM.NewOutgoingMessage(formatAsSnippet(text), channel))
return
}
// longer messages are getting uploaded as files
f := slack.FileUploadParameters{
Filename: "bow response",
Content: text,
Filetype: "text",
Channels: []string{channel},
}
_, err := b.slackClient.UploadFile(f)
if err != nil {
log.WithFields(log.Fields{
"error": err,
}).Error("Respond: failed to send message")
}
}
func (b *Bot) isBotMessage(event *slack.MessageEvent, eventText string) bool {
prefixes := []string{
b.msgPrefix,
b.name,
// "kel",
}
for _, p := range prefixes {
if strings.HasPrefix(eventText, p) {
return true
}
}
// Direct message channels always starts with 'D'
return strings.HasPrefix(event.Channel, "D")
}
func (b *Bot) trimBot(msg string) string {
msg = strings.Replace(msg, strings.ToLower(b.msgPrefix), "", 1)
msg = strings.TrimPrefix(msg, b.name)
msg = strings.Trim(msg, " :\n")
return msg
}
func formatAsSnippet(response string) string {
return "```" + response + "```"
}