Adding upstream version 0.8.9.

Signed-off-by: Daniel Baumann <daniel@debian.org>

pkg/services/telegram/telegram_client.go

@@ -0,0 +1,74 @@
+package telegram
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/nicholas-fedor/shoutrrr/pkg/util/jsonclient"
+)
+
+// Client for Telegram API.
+type Client struct {
+	token string
+}
+
+func (c *Client) apiURL(endpoint string) string {
+	return fmt.Sprintf(apiFormat, c.token, endpoint)
+}
+
+// GetBotInfo returns the bot User info.
+func (c *Client) GetBotInfo() (*User, error) {
+	response := &userResponse{}
+	err := jsonclient.Get(c.apiURL("getMe"), response)
+
+	if !response.OK {
+		return nil, GetErrorResponse(jsonclient.ErrorBody(err))
+	}
+
+	return &response.Result, nil
+}
+
+// GetUpdates retrieves the latest updates.
+func (c *Client) GetUpdates(
+	offset int,
+	limit int,
+	timeout int,
+	allowedUpdates []string,
+) ([]Update, error) {
+	request := &updatesRequest{
+		Offset:         offset,
+		Limit:          limit,
+		Timeout:        timeout,
+		AllowedUpdates: allowedUpdates,
+	}
+	response := &updatesResponse{}
+	err := jsonclient.Post(c.apiURL("getUpdates"), request, response)
+
+	if !response.OK {
+		return nil, GetErrorResponse(jsonclient.ErrorBody(err))
+	}
+
+	return response.Result, nil
+}
+
+// SendMessage sends the specified Message.
+func (c *Client) SendMessage(message *SendMessagePayload) (*Message, error) {
+	response := &messageResponse{}
+	err := jsonclient.Post(c.apiURL("sendMessage"), message, response)
+
+	if !response.OK {
+		return nil, GetErrorResponse(jsonclient.ErrorBody(err))
+	}
+
+	return response.Result, nil
+}
+
+// GetErrorResponse retrieves the error message from a failed request.
+func GetErrorResponse(body string) error {
+	response := &responseError{}
+	if err := json.Unmarshal([]byte(body), response); err == nil {
+		return response
+	}
+
+	return nil
+}