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clessy/broker/telegram.go

69 lines
1.5 KiB
Go

package main
import (
"encoding/json"
"errors"
"log"
"net/http"
"net/url"
"strconv"
"github.com/hamcha/clessy/tg"
)
const APIEndpoint = "https://api.telegram.org/"
type Telegram struct {
Token string
}
func mkAPI(token string) *Telegram {
tg := new(Telegram)
tg.Token = token
return tg
}
func (t Telegram) SetWebhook(webhook string) {
resp, err := http.PostForm(t.apiURL("setWebhook"), url.Values{"url": {webhook}})
if !checkerr("SetWebhook", err) {
defer resp.Body.Close()
var result tg.APIResponse
err = json.NewDecoder(resp.Body).Decode(&result)
if err != nil {
log.Println("[SetWebhook] Could not read reply: " + err.Error())
return
}
if result.Ok {
log.Println("Webhook successfully set!")
} else {
log.Printf("[SetWebhook] Error setting webhook (errcode %d): %s\n", *(result.ErrCode), *(result.Description))
panic(errors.New("Cannot set webhook"))
}
}
}
func (t Telegram) SendTextMessage(data tg.ClientTextMessageData) {
postdata := url.Values{
"chat_id": {strconv.Itoa(data.ChatID)},
"text": {data.Text},
"parse_mode": {"HTML"},
}
if data.ReplyID != nil {
postdata["reply_to_message_id"] = []string{strconv.Itoa(*(data.ReplyID))}
}
_, err := http.PostForm(t.apiURL("sendMessage"), postdata)
checkerr("SendTextMessage", err)
}
func (t Telegram) apiURL(method string) string {
return APIEndpoint + "bot" + t.Token + "/" + method
}
func checkerr(method string, err error) bool {
if err != nil {
log.Printf("Received error with call to %s: %s\n", method, err.Error())
return true
}
return false
}