# Handling other updates

## How to handle other updates

{% code title="app.controller.ts" %}

```typescript
import { OnCommand, Controller } from 'nestgram';
import { AppService } from './app.service';

@Controller()
export class AppController {
  constructor(private readonly appService?: AppService) {}

  @OnCommand('start')
  async start(): Promise<string> {
    return 'Hello, world!';
  }
}
```

{% endcode %}

In this code, bot says `Hello, world` if user writes command **/start** (`@OnCommand` is responsible for this). But you can also handle other updates: when user sends some message, channel writes a post, user edits a message, channel edits a post, user writes message with some entities or other updates. To handle other updates, you just need to import the appropriate decorator and use it. You can see an example below, in this, bot handles update when a channel publishes a post

{% code title="app.controller.ts" %}

```typescript
import { OnPost, Controller, Message, IMessage } from 'nestgram';
import { AppService } from './app.service';

@Controller()
export class AppController {
  constructor(private readonly appService?: AppService) {}

  @OnPost()
  async post(@Message() message: IMessage): Promise<any> {
    console.log(message);
  }
}
```

{% endcode %}

## Allowed updates

| Decorator                                                                                                                  | Description                                                              | Params                                                                                                        |
| -------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------- |
| OnCommand                                                                                                                  | When the user writes some command (e.g. /start)                          | text?: string - The command text you want to listen to. Optional. If not specified, listens for all commands. |
| OnText                                                                                                                     | When the user writes some text messages (e.g. "Hello!")                  | text?: string - The text you want to listen to. Optional. If not specified, listens for all text messages.    |
| OnMessage                                                                                                                  | When the user sends some message                                         | subtype?: 'edit' \| 'post' \| 'edit\_post'                                                                    |
| OnMessageEdit                                                                                                              | When the user edits a message                                            | none                                                                                                          |
| OnPost                                                                                                                     | When the channel publishes some post                                     | none                                                                                                          |
| OnPostEdit                                                                                                                 | When the channel edits a post                                            | none                                                                                                          |
| OnEntity                                                                                                                   | When the user sends a message with some entity (e.g. url, command, bold) | entity?: [string](https://core.telegram.org/bots/api#messageentity)                                           |
| [OnClick](https://degreetpro.gitbook.io/nestgram/keyboards/handle-underthemessage-keyboard-button-click-by-alert-or-toast) | When the user clicks on the underTheMessage button                       | buttonId: string                                                                                              |
| OnMedia                                                                                                                    | When the user sends some media file                                      | fileType?: string - Media file type you want to listen to                                                     |
| OnPhoto                                                                                                                    | When the user sends some photo                                           | none                                                                                                          |
| OnVideo                                                                                                                    | When the user sends some video                                           | none                                                                                                          |
| OnAudio                                                                                                                    | When the user sends some audio                                           | none                                                                                                          |
| OnAnimation                                                                                                                | When the user sends some animation (for example, gif)                    | none                                                                                                          |
| OnVoice                                                                                                                    | When the user sends some voice message                                   | none                                                                                                          |
| OnVideoNote                                                                                                                | When the user sends some video note message                              | none                                                                                                          |
| OnDocument                                                                                                                 | When the user sends some document                                        | none                                                                                                          |
| OnLocation                                                                                                                 | When the user sends a location                                           | none                                                                                                          |
| OnVenue                                                                                                                    | When the user sends a venue                                              | none                                                                                                          |
| OnContact                                                                                                                  | When the user sends a contact                                            | none                                                                                                          |
| OnPoll                                                                                                                     | When the user or channel sends a poll                                    | none                                                                                                          |
| OnPollEdit                                                                                                                 | When the poll edited (for example, when the channel closed the poll)     | none                                                                                                          |
| OnPollAnswer                                                                                                               | When the user answers to the poll (only not anonymous)                   | none                                                                                                          |
| OnUpdate                                                                                                                   | When the bot gets some update                                            | none                                                                                                          |
| OnForward                                                                                                                  | When the user forwards some message                                      | none                                                                                                          |
| OnDice                                                                                                                     | When the user sends dice                                                 | none                                                                                                          |
| OnJoinRequest                                                                                                              | When the user sends chat join request                                    | none                                                                                                          |