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chatter.go
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chatter.go
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package chatter
import (
"fmt"
"log"
"os"
"gopkg.in/telegram-bot-api.v4"
)
// Handler is a telegram bot
type Handler struct {
bot *tgbotapi.BotAPI
logger *log.Logger
}
// Interface is the stats public functions
type Interface interface {
Start() (Channel, error)
SendMessage(int64, string) error
}
// Channel is a message channel
type Channel tgbotapi.UpdatesChannel
// Start begins listening to messages from Telegram
func (r *Handler) Start() (Channel, error) {
u := tgbotapi.NewUpdate(0)
u.Timeout = 60
c, err := r.bot.GetUpdatesChan(u)
if err != nil {
return nil, fmt.Errorf("Unable to start: %v", err)
}
return Channel(c), nil
}
// SendMessage will send a message to a given user
func (r *Handler) SendMessage(chatID int64, message string) error {
msg := tgbotapi.NewMessage(chatID, message)
msg.ParseMode = tgbotapi.ModeHTML
msg.DisableWebPagePreview = true
_, err := r.bot.Send(msg)
if err != nil {
return fmt.Errorf("Unable to send: %v", err)
}
return nil
}
// New creates a new Telegram bot
func New(version, token string) (*Handler, error) {
logger := log.New(os.Stderr, "[CHAT] ", log.LstdFlags)
bot, err := tgbotapi.NewBotAPI(token)
if err != nil {
return nil, fmt.Errorf("Unable to setup: %v", err)
}
logger.Printf("Authorized on account %s", bot.Self.UserName)
return &Handler{
bot: bot,
logger: logger,
}, nil
}