Blocks allow BOTS to augment the capacities of a chat message. At the moment only one block is available: `actions`, accepting only one type of element: `button`.
<img width="708" alt="Screenshot 2024-11-15 at 19 14 02" src="https://github.com/user-attachments/assets/63f32a29-05b1-4f32-9edd-8d8e1007d705">
# Usage
```ruby
Chat::CreateMessage.call(
params: {
message: "Welcome!",
chat_channel_id: 2,
blocks: [
{
type: "actions",
elements: [
{ value: "foo", type: "button", text: { text: "How can I install themes?", type: "plain_text" } }
]
}
]
},
guardian: Discourse.system_user.guardian
)
```
# Documentation
## Blocks
### Actions
Holds interactive elements: button.
#### Fields
| Field | Type | Description | Required? |
|--------|--------|--------|--------|
| type | string | For an actions block, type is always `actions` | Yes |
| elements | array | An array of interactive elements, maximum 10 elements | Yes |
| block_id | string | An unique identifier for the block, will be generated if not specified. It has to be unique per message | No |
#### Example
```json
{
"type": "actions",
"block_id": "actions_1",
"elements": [...]
}
```
## Elements
### Button
#### Fields
| Field | Type | Description | Required? |
|--------|--------|--------|--------|
| type | string | For a button, type is always `button` | Yes |
| text | object | A text object holding the type and text. Max 75 characters | Yes |
| value | string | The value returned after the interaction has been validated. Maximum length is 2000 characters | No |
| style | string | Can be `primary` , `success` or `danger` | No |
| action_id | string | An unique identifier for the action, will be generated if not specified. It has to be unique per message | No |
#### Example
```json
{
"type": "actions",
"block_id": "actions_1",
"elements": [
{
"type": "button",
"text": {
"type": "plain_text",
"text": "Ok"
},
"value": "ok",
"action_id": "button_1"
}
]
}
```
## Interactions
When a user interactions with a button the following flow will happen:
- We send an interaction request to the server
- Server checks if the user can make this interaction
- If the user can make this interaction, the server will:
* `DiscourseEvent.trigger(:chat_message_interaction, interaction)`
* return a JSON document
```json
{
"interaction": {
"user": {
"id": 1,
"username": "j.jaffeux"
},
"channel": {
"id": 1,
"title": "Staff"
},
"message": {
"id": 1,
"text": "test",
"user_id": -1
},
"action": {
"text": {
"text": "How to install themes?",
"type": "plain_text"
},
"type": "button",
"value": "click_me_123",
"action_id": "bf4f30b9-de99-4959-b3f5-632a6a1add04"
}
}
}
```
* Fire a `appEvents.trigger("chat:message_interaction", interaction)`
