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// SPDX-FileCopyrightText: Copyright The Miniflux Authors. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
package telegrambot // import "miniflux.app/v2/internal/integration/telegrambot"
import (
"bytes"
"encoding/json"
"fmt"
"net/http"
"net/url"
"time"
"miniflux.app/v2/internal/version"
)
const (
defaultClientTimeout = 10 * time.Second
telegramAPIEndpoint = "https://api.telegram.org"
MarkdownFormatting = "Markdown"
MarkdownV2Formatting = "MarkdownV2"
HTMLFormatting = "HTML"
)
type Client struct {
botToken string
chatID string
}
func NewClient(botToken, chatID string) *Client {
return &Client{
botToken: botToken,
chatID: chatID,
}
}
// Specs: https://core.telegram.org/bots/api#getme
func (c *Client) GetMe() (*User, error) {
endpointURL, err := url.JoinPath(telegramAPIEndpoint, "/bot"+c.botToken, "/getMe")
if err != nil {
return nil, fmt.Errorf("telegram: unable to join base URL and path: %w", err)
}
request, err := http.NewRequest(http.MethodGet, endpointURL, nil)
if err != nil {
return nil, fmt.Errorf("telegram: unable to create request: %v", err)
}
request.Header.Set("Accept", "application/json")
request.Header.Set("User-Agent", "Miniflux/"+version.Version)
httpClient := &http.Client{Timeout: defaultClientTimeout}
response, err := httpClient.Do(request)
if err != nil {
return nil, fmt.Errorf("telegram: unable to send request: %v", err)
}
defer response.Body.Close()
var userResponse UserResponse
if err := json.NewDecoder(response.Body).Decode(&userResponse); err != nil {
return nil, fmt.Errorf("telegram: unable to decode user response: %w", err)
}
if !userResponse.Ok {
return nil, fmt.Errorf("telegram: unable to send message: %s (error code is %d)", userResponse.Description, userResponse.ErrorCode)
}
return &userResponse.Result, nil
}
// Specs: https://core.telegram.org/bots/api#sendmessage
func (c *Client) SendMessage(message *MessageRequest) (*Message, error) {
endpointURL, err := url.JoinPath(telegramAPIEndpoint, "/bot"+c.botToken, "/sendMessage")
if err != nil {
return nil, fmt.Errorf("telegram: unable to join base URL and path: %w", err)
}
requestBody, err := json.Marshal(message)
if err != nil {
return nil, fmt.Errorf("telegram: unable to encode request body: %v", err)
}
request, err := http.NewRequest(http.MethodPost, endpointURL, bytes.NewReader(requestBody))
if err != nil {
return nil, fmt.Errorf("telegram: unable to create request: %v", err)
}
request.Header.Set("Content-Type", "application/json")
request.Header.Set("Accept", "application/json")
request.Header.Set("User-Agent", "Miniflux/"+version.Version)
httpClient := &http.Client{Timeout: defaultClientTimeout}
response, err := httpClient.Do(request)
if err != nil {
return nil, fmt.Errorf("telegram: unable to send request: %v", err)
}
defer response.Body.Close()
var messageResponse MessageResponse
if err := json.NewDecoder(response.Body).Decode(&messageResponse); err != nil {
return nil, fmt.Errorf("telegram: unable to decode discovery response: %w", err)
}
if !messageResponse.Ok {
return nil, fmt.Errorf("telegram: unable to send message: %s (error code is %d)", messageResponse.Description, messageResponse.ErrorCode)
}
return &messageResponse.Result, nil
}
type InlineKeyboard struct {
InlineKeyboard []InlineKeyboardRow `json:"inline_keyboard"`
}
type InlineKeyboardRow []*InlineKeyboardButton
type InlineKeyboardButton struct {
Text string `json:"text"`
URL string `json:"url,omitempty"`
}
type User struct {
ID int64 `json:"id"`
IsBot bool `json:"is_bot"`
FirstName string `json:"first_name"`
LastName string `json:"last_name"`
Username string `json:"username"`
LanguageCode string `json:"language_code"`
IsPremium bool `json:"is_premium"`
CanJoinGroups bool `json:"can_join_groups"`
CanReadAllGroupMessages bool `json:"can_read_all_group_messages"`
SupportsInlineQueries bool `json:"supports_inline_queries"`
}
type Chat struct {
ID int64 `json:"id"`
Type string `json:"type"`
Title string `json:"title"`
}
type Message struct {
MessageID int64 `json:"message_id"`
From User `json:"from"`
Chat Chat `json:"chat"`
MessageThreadID int64 `json:"message_thread_id"`
Date int64 `json:"date"`
}
type BaseResponse struct {
Ok bool `json:"ok"`
ErrorCode int `json:"error_code"`
Description string `json:"description"`
}
type UserResponse struct {
BaseResponse
Result User `json:"result"`
}
type MessageRequest struct {
ChatID string `json:"chat_id"`
MessageThreadID int64 `json:"message_thread_id,omitempty"`
Text string `json:"text"`
ParseMode string `json:"parse_mode,omitempty"`
DisableWebPagePreview bool `json:"disable_web_page_preview"`
DisableNotification bool `json:"disable_notification"`
ReplyMarkup *InlineKeyboard `json:"reply_markup,omitempty"`
}
type MessageResponse struct {
BaseResponse
Result Message `json:"result"`
}
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