/
telegrambee.go
160 lines (138 loc) 路 3.76 KB
/
telegrambee.go
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/*
* Copyright (C) 2016 Gonzalo Izquierdo
* 2017 Christian Muehlhaeuser
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Authors:
* Gonzalo Izquierdo <lalotone@gmail.com>
* Christian Muehlhaeuser <muesli@gmail.com>
*/
// Package telegrambee is a Bee that can connect to Telegram.
package telegrambee
import (
"io/ioutil"
"os"
"strconv"
"strings"
"time"
telegram "github.com/go-telegram-bot-api/telegram-bot-api"
"github.com/muesli/beehive/bees"
)
// TelegramBee is a Bee that can connect to Telegram.
type TelegramBee struct {
bees.Bee
// Telegram bot API Key
apiKey string
// Bot API client
bot *telegram.BotAPI
}
// Action triggers the action passed to it.
func (mod *TelegramBee) Action(action bees.Action) []bees.Placeholder {
outs := []bees.Placeholder{}
switch action.Name {
case "send":
chatID := ""
text := ""
action.Options.Bind("chat_id", &chatID)
action.Options.Bind("text", &text)
cid, err := strconv.ParseInt(chatID, 10, 64)
if err != nil {
panic("Invalid telegram chat ID")
}
msg := telegram.NewMessage(cid, text)
_, err = mod.bot.Send(msg)
if err != nil {
mod.Logf("Error sending message %v", err)
}
}
return outs
}
// Run executes the Bee's event loop.
func (mod *TelegramBee) Run(eventChan chan bees.Event) {
var err error
mod.bot, err = telegram.NewBotAPI(mod.apiKey)
if err != nil {
mod.LogErrorf("Authorization failed, make sure the Telegram API key is correct: %s", err)
return
}
mod.Logf("Authorized on account %s", mod.bot.Self.UserName)
u := telegram.NewUpdate(0)
u.Timeout = 60
updates, err := mod.bot.GetUpdatesChan(u)
if err != nil {
panic(err)
}
for {
select {
case <-mod.SigChan:
return
case update := <-updates:
if update.Message == nil || update.Message.Text == "" {
continue
}
ev := bees.Event{
Bee: mod.Name(),
Name: "message",
Options: []bees.Placeholder{
{
Name: "text",
Type: "string",
Value: update.Message.Text,
},
{
Name: "chat_id",
Type: "string",
Value: strconv.FormatInt(update.Message.Chat.ID, 10),
},
{
Name: "user_id",
Type: "string",
Value: strconv.Itoa(update.Message.From.ID),
},
{
Name: "timestamp",
Type: "timestamp",
Value: time.Now(),
},
},
}
eventChan <- ev
}
}
}
// ReloadOptions parses the config options and initializes the Bee.
func (mod *TelegramBee) ReloadOptions(options bees.BeeOptions) {
mod.SetOptions(options)
apiKey := getAPIKey(&options)
mod.apiKey = apiKey
}
// Gets the Bot's API key from a file, the recipe config or the
// TELEGRAM_API_KEY environment variable.
func getAPIKey(options *bees.BeeOptions) string {
var apiKey string
options.Bind("api_key", &apiKey)
if strings.HasPrefix(apiKey, "file://") {
buf, err := ioutil.ReadFile(strings.TrimPrefix(apiKey, "file://"))
if err != nil {
panic("Error reading API key file " + apiKey)
}
apiKey = string(buf)
}
if strings.HasPrefix(apiKey, "env://") {
buf := strings.TrimPrefix(apiKey, "env://")
apiKey = os.Getenv(string(buf))
}
return strings.TrimSpace(apiKey)
}