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98 lines
4.7 KiB
Markdown
98 lines
4.7 KiB
Markdown
# TelegramBotAPI
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[ ](https://bintray.com/insanusmokrassar/StandardRepository/TelegramBotAPI/_latestVersion)
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[](https://jenkins.insanusmokrassar.space/job/TelegramBotAPI_master__publishing/)
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## What is it?
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It is one more project which wish to be useful and full Telegram Bots API bridge for Kotlin. Most part of some specific
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solves or unuseful moments are describing by official [Telegram Bot API](https://core.telegram.org/bots/api).
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## Compatibility
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This version compatible with [14th of April 2019 update of TelegramBotAPI](https://core.telegram.org/bots/api#april-14-2019). There is one exception of implemented functionality. It is Telegram Passport API, which was presented in [August 2018 update of TelegramBotAPI](https://core.telegram.org/bots/api#august-27-2018) update. It will be implemented as soon as possible. All included and supported API
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can be found on [wiki](https://github.com/InsanusMokrassar/TelegramBotAPI/wiki/Included-API).
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## How to implement library?
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Common ways to implement this library are presented here. In some cases it will require additional steps
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like inserting of additional libraries (like `kotlin stdlib`). In the examples will be used variable
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`telegrambotapi.version`, which must be set up by developer. Available versions are presented on
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[bintray](https://bintray.com/insanusmokrassar/StandardRepository/TelegramBotAPI), next version is last published:
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[ ](https://bintray.com/insanusmokrassar/StandardRepository/TelegramBotAPI/_latestVersion)
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### Maven
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```xml
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<dependency>
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<groupId>com.github.insanusmokrassar</groupId>
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<artifactId>TelegramBotAPI</artifactId>
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<version>${telegrambotapi.version}</version>
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</dependency>
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```
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### Gradle
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```groovy
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implementation "com.github.insanusmokrassar:TelegramBotAPI:${telegrambotapi.version}"
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```
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### Gradle (old)
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```groovy
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compile "com.github.insanusmokrassar:TelegramBotAPI:${telegrambotapi.version}"
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```
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## How to work with library?
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By default in any documentation will be meaning that you have variable in scope with names
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| Name of variable | Description | Where to get? (Examples) |
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| executor | [RequestsExecutor](src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/bot/RequestsExecutor.kt) | [Ktor RequestExecutor realisation](src/main/kotlin/com/github/insanusmokrassar/TelegramBotAPI/bot/Ktor/KtorRequestsExecutor.kt) |
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## Requests Examples
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### Get Me
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```kotlin
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executor.execute(GetMe())
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```
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As a result you will receive `User` object. This object used as is now (as in API documentation), but it is possible
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that this class will be renamed to `RawUser` and you will be able to get real realisation of this object like `Bot` (in
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cases when `isBot` == `true`) or `User` (otherwise)
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## Getting updates
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In this library currently realised two ways to get updates from telegram:
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* Polling - in this case bot will request updates from time to time (you can set up delay between requests)
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* Webhook via reverse proxy or something like this
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### Updates filters
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Currently webhook method contains `UpdatesFilter` as necessary argument for getting updates.
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`UpdatesFilter` will sort updates and throw their into different callbacks. Currently supporting
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separate getting updates for media groups - they are accumulating with debounce in one second
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(for being sure that all objects of media group was received).
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Updates polling also support `UpdatesFilter` but you must not use it and can get updates directly
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in `UpdateReceiver`, which you will provide to `startGettingOfUpdates` method
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### Webhook set up
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If you wish to use webhook method, you will need:
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* White IP - your IP address or host, which available for calling. [TelegramBotAPI](https://core.telegram.org/bots/api#setwebhook)
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recommend to use some unique address for each bot which you are using
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* SSL certificate. Usually you can obtain the certificate using your domain provider, [Let'sEncrypt](https://letsencrypt.org/) or [create it](https://core.telegram.org/bots/self-signed)
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* Nginx or something like this
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Template for Nginx server config you can find in [this gist](https://gist.github.com/InsanusMokrassar/fcc6e09cebd07e46e8f0fdec234750c4#file-nginxssl-conf).
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For webhook you can provide `File` with public part of certificate, `URL` where bot will be available and inner `PORT` which
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will be used to start receiving of updates. Actually, you can skip passing of `File` when you have something like
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nginx for proxy forwarding.
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