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tgbotapi/TelegramBotAPI-extensions-api/README.md

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# TelegramBotAPI extensions
[![Download](https://api.bintray.com/packages/insanusmokrassar/StandardRepository/TelegramBotAPI-extensions-api/images/download.svg) ](https://bintray.com/insanusmokrassar/StandardRepository/TelegramBotAPI-extensions-api/_latestVersion)
[![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.github.insanusmokrassar/TelegramBotAPI-extensions-api/badge.svg)](https://maven-badges.herokuapp.com/maven-central/com.github.insanusmokrassar/TelegramBotAPI-extensions-api)
## What is it?
It is wrapper library for [TelegramBotAPI-core](../TelegramBotAPI-core/README.md). Here you can find extensions for
`RequestsExecutor`, which are more look like Telegram Bot API requests and in the same time have more obvious signatures
to help understand some restrictions in Telegram system.
## Compatibility
This library always compatible with original `TelegramBotAPI-core` library version
## How to implement library?
Common ways to implement this library are presented here. In some cases it will require additional steps
like inserting of additional libraries (like `kotlin stdlib`). In the examples will be used variable
`telegrambotapi-extensions-api.version`, which must be set up by developer. Available versions are presented on
[bintray](https://bintray.com/insanusmokrassar/StandardRepository/TelegramBotAPI-extensions-api), next version is last published:
[![Download](https://api.bintray.com/packages/insanusmokrassar/StandardRepository/TelegramBotAPI-extensions-api/images/download.svg) ](https://bintray.com/insanusmokrassar/StandardRepository/TelegramBotAPI-extensions-api/_latestVersion)
### Maven
Dependency config presented here:
```xml
<dependency>
<groupId>com.github.insanusmokrassar</groupId>
<artifactId>TelegramBotAPI-extensions-api</artifactId>
<version>${telegrambotapi-extensions-api.version}</version>
</dependency>
```
### Gradle
To use last versions you will need to add one line in repositories block of your `build.gradle`:
`jcenter()` or `mavenCentral()`
And add next line to your dependencies block:
```groovy
implementation "com.github.insanusmokrassar:TelegramBotAPI-extensions-api:$telegrambotapi_extensions_api_version"
```
or for old gradle:
```groovy
compile "com.github.insanusmokrassar:TelegramBotAPI-extensions-api:$telegrambotapi_extensions_api_version"
```
## Example of usage and comparison with `TelegramBotAPI`
Here presented review table for comparison of api from original [TelegramBotAPI](../TelegramBotAPI/README.md#Requests)
and extensions-api library. First of all, this library allow to create bot instance in a new way:
```kotlin
val bot = telegramBot("IT IS YOUR TOKEN")
```
There are a lot of signature for this. For example, you can create bot with next code:
```kotlin
val bot = telegramBot("IT IS YOUR TOKEN") {
proxy = ProxyBuilder.socks("127.0.0.1", 1080)
}
```
In all examples supposed that you have created bot.
| TelegramBotAPI-core | TelegramBotAPI-extensions-api |
|---------------------|-------------------------------|
| bot.execute(GetMe) | bot.getMe() |
| bot.execute(SendTextMessage(someChatId, text)) | bot.sendTextMessage(chat, text) |
## Updates
**Currently, these paragraphs almost outdated due to the fact that extensions for listening of updates and webhooks were
replaced into `TelegramBotAPI-extensions-utils`. But, most part of information below is correct with small fixes and
adding of `TelegramBotAPI-extensions-utils` dependency.**
Usually, it is more comfortable to use filter object to get separated types of updates:
```kotlin
val filter = FlowsUpdatesFilter(100)
```
In this case you will be able:
* Separate types of incoming updates (even media groups)
* Simplify launch of getting updates:
```kotlin
bot.startGettingOfUpdates(
filter,
scope = CoroutineScope(Dispatchers.Default)
)
```
* Use `filter` flows to comfortable filter, map and do other operations with the whole
getting updates process:
```kotlin
filter.messageFlow.mapNotNull {
it.data as? ContentMessage<*>
}.onEach {
println(it)
}.launchIn(
CoroutineScope(Dispatchers.Default)
)
```
### Alternative way
There is an alternative way to get updates. In fact it is almost the same, but could be more useful for some cases:
```kotlin
val filter = bot.startGettingOfUpdates(
scope = CoroutineScope(Dispatchers.Default)
) { // Here as reveiver will be FlowsUpdatesFilter
messageFlow.mapNotNull {
it.data as? ContentMessage<*>
}.onEach {
println(it)
}.launchIn(
CoroutineScope(Dispatchers.Default)
)
}
```