Adds pictures to telegram messages

notification/service_telegram.go

@@ -3,6 +3,8 @@ package notification
 import (
 	"bytes"
 	"fmt"
+	"os"
+	"path/filepath"
 	"strconv"
 	"text/template"
 
@@ -37,6 +39,18 @@ func NewTelegramNotificationService(logger *log.Logger, config *model.Config) (*
 	}, nil
 }
 
+func (tns *TelegramNotificationService) getPictureFileForBirthday(birthday *model.Birthday) (string, error) {
+	filename := birthday.Filename()
+	path := filepath.Join(tns.config.Birthdays.Pictures, filename)
+
+	_, err := os.Stat(path)
+	if err != nil {
+		return "", err
+	}
+
+	return path, nil
+}
+
 func (tns *TelegramNotificationService) Notify(birthday *model.Birthday, template *template.Template) error {
 	var msgText string
 	if template != nil {
@@ -50,12 +64,26 @@ func (tns *TelegramNotificationService) Notify(birthday *model.Birthday, templat
 		msgText = fmt.Sprintf("It's %s's birthday! You can reach them out at %s or %s", birthday.Name, birthday.Email, birthday.Phone)
 	}
 
-	chatID, err := strconv.Atoi(tns.config.ChannelID)
+	chatID, err := strconv.Atoi(tns.config.TelegramNotifications.ChannelID)
 	if err != nil {
 		return fmt.Errorf("cannot parse ChannelID: %w", err)
 	}
 
-	msg := tgbotapi.NewMessage(int64(chatID), msgText)
+	picture, err := tns.getPictureFileForBirthday(birthday)
+	if err != nil && !os.IsNotExist(err) {
+		return fmt.Errorf("cannot get picture for birthday: %w", err)
+	}
+
+	var msg tgbotapi.Chattable
+	if picture == "" {
+		msg = tgbotapi.NewMessage(int64(chatID), msgText)
+
+	} else {
+		photo := tgbotapi.NewPhoto(int64(chatID), tgbotapi.FilePath(picture))
+		photo.Caption = msgText
+		msg = photo
+	}
+
 	if _, err := tns.bot.Send(msg); err != nil {
 		return fmt.Errorf("error sending message: %w", err)
 	}