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2019-05-31 00:18:41 +01:00
package telegram
import (
"errors"
"strings"
"sync"
"github.com/forestgiant/sliceutil"
"github.com/micro/go-micro/v2/agent/input"
log "github.com/micro/go-micro/v2/logger"
tgbotapi "gopkg.in/telegram-bot-api.v4"
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)
type telegramConn struct {
input *telegramInput
recv <-chan tgbotapi.Update
exit chan bool
syncCond *sync.Cond
mutex sync.Mutex
}
func newConn(input *telegramInput) (*telegramConn, error) {
conn := &telegramConn{
input: input,
}
conn.syncCond = sync.NewCond(&conn.mutex)
go conn.run()
return conn, nil
}
func (tc *telegramConn) run() {
u := tgbotapi.NewUpdate(0)
u.Timeout = 60
updates, err := tc.input.api.GetUpdatesChan(u)
if err != nil {
return
}
tc.recv = updates
tc.syncCond.Signal()
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select {
case <-tc.exit:
return
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}
}
func (tc *telegramConn) Close() error {
return nil
}
func (tc *telegramConn) Recv(event *input.Event) error {
if event == nil {
return errors.New("event cannot be nil")
}
for {
if tc.recv == nil {
tc.mutex.Lock()
tc.syncCond.Wait()
}
update := <-tc.recv
if update.Message == nil || (len(tc.input.whitelist) > 0 && !sliceutil.Contains(tc.input.whitelist, update.Message.From.UserName)) {
continue
}
if event.Meta == nil {
event.Meta = make(map[string]interface{})
}
event.Type = input.TextEvent
event.From = update.Message.From.UserName
event.To = tc.input.api.Self.UserName
event.Data = []byte(update.Message.Text)
event.Meta["chatId"] = update.Message.Chat.ID
event.Meta["chatType"] = update.Message.Chat.Type
event.Meta["messageId"] = update.Message.MessageID
return nil
}
}
func (tc *telegramConn) Send(event *input.Event) error {
messageText := strings.TrimSpace(string(event.Data))
chatId := event.Meta["chatId"].(int64)
chatType := ChatType(event.Meta["chatType"].(string))
msgConfig := tgbotapi.NewMessage(chatId, messageText)
msgConfig.ParseMode = tgbotapi.ModeHTML
if sliceutil.Contains([]ChatType{Group, Supergroup}, chatType) {
msgConfig.ReplyToMessageID = event.Meta["messageId"].(int)
}
_, err := tc.input.api.Send(msgConfig)
if err != nil {
// probably it could be because of nested HTML tags -- telegram doesn't allow nested tags
log.Error("[telegram][Send] error:", err)
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msgConfig.Text = "This bot couldn't send the response (Internal error)"
tc.input.api.Send(msgConfig)
}
return nil
}