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# tgbot-cpp
[](https://travis-ci.org/reo7sp/tgbot-cpp)
[](https://github.com/reo7sp/tgbot-cpp/graphs/contributors)
[](http://reo7sp.github.io/tgbot-cpp)
C++ library for Telegram bot API.
Documentation is located [here](http://reo7sp.github.io/tgbot-cpp).
## State
- [x] Bot API 3.0 ~ 3.6
- [x] Bot API 4.0 (Implemented all APIs except 'Telegram Passport')
## Sample
Simple echo bot which sends everything it receives:
```cpp
#include <stdio.h>
#include <tgbot/tgbot.h>
int main() {
TgBot::Bot bot("PLACE YOUR TOKEN HERE");
bot.getEvents().onCommand("start", [&bot](TgBot::Message::Ptr message) {
bot.getApi().sendMessage(message->chat->id, "Hi!");
});
bot.getEvents().onAnyMessage([&bot](TgBot::Message::Ptr message) {
printf("User wrote %s\n", message->text.c_str());
if (StringTools::startsWith(message->text, "/start")) {
return;
}
bot.getApi().sendMessage(message->chat->id, "Your message is: " + message->text);
});
try {
printf("Bot username: %s\n", bot.getApi().getMe()->username.c_str());
TgBot::TgLongPoll longPoll(bot);
while (true) {
printf("Long poll started\n");
longPoll.start();
}
} catch (TgBot::TgException& e) {
printf("error: %s\n", e.what());
}
return 0;
}
```
All other samples are located [here](samples).
## Dependencies
Firstly you need to install some dependencies such as Boost and build tools such as CMake. On Debian-based distibutives you can do it with these commands:
```sh
sudo apt-get install g++ make binutils cmake libssl-dev libboost-system-dev zlib1g-dev
```
If you want to use curl-based http client `CurlHttpClient`, you also need to install `libcurl4-openssl-dev` package.
## Library installation
If you want to install the library system-wide:
```sh
git clone https://github.com/reo7sp/tgbot-cpp
cd tgbot-cpp
cmake .
make -j4
sudo make install
```
Or you can treat this repository as a submodule of your project, for example, see [echobot-submodule](samples/echobot-submodule/CMakeLists.txt)
## Specific library installation notes
### Docker
You can use Docker to build and run your bot. Set the base image of your's Dockerfile to [reo7sp/tgbot-cpp](https://hub.docker.com/r/reo7sp/tgbot-cpp/).
## Bot compilation
### With CMake
[Example CMakeLists.txt](samples/echobot/CMakeLists.txt)
### Without CMake
```sh
g++ telegram_bot.cpp -o telegram_bot --std=c++11 -I/usr/local/include -lTgBot -lboost_system -lssl -lcrypto -lpthread
```
### Options available when compiling bot
#### With CMake
```
add_definitions(-DTGBOT_DISABLE_NAGLES_ALGORITHM) # Disable 'Nagle's algorithm'
add_definitions(-DTGBOT_CHANGE_SOCKET_BUFFER_SIZE) # Socket Buffer Size Expansion
add_definitions(-DTGBOT_CHANGE_READ_BUFFER_SIZE) # Read Buffer Size Expansion
```
#### Without CMake
```
-DTGBOT_DISABLE_NAGLES_ALGORITHM
-DTGBOT_CHANGE_SOCKET_BUFFER_SIZE
-DTGBOT_CHANGE_READ_BUFFER_SIZE
```
## Licence
[The MIT License](http://opensource.org/licenses/MIT).
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