How to enable message integration

Assuming that single sign-on has been integrated (such as integration based on WeCom, DingTalk, Welink, Feishu, or Organization Structure Sync API which is equivalent to enabling single sign-on), the HAP system supports pushing application messages to external systems, and can also be customized by the HAP team to integrate with external systems [custom development will incur additional charges].

To actively receive application messages from HAP:

If not based on integration with WeCom, DingTalk, Welink, Feishu, or Organization Structure Sync API, you need to mount the following configuration file in advance:

/data/hap/script/volume/sso/extend.json：
```
{
  "relation": true
}
```
Add the following to docker-compose.yaml volumes corresponding microservice application:
```
- ./volume/sso/extend.json:/usr/local/MDPrivateDeployment/sso/extend.json
```

Create the configuration file required to receive application messages:

/data/hap/script/volume/integrate/appextensions.json：

{
  "WebhookUrl": "API address to receive messages", // Required, e.g., https://api.domain.com/hooks/NjA0NzdjMDNjMGFjMTE3ZGUwMjRjN2Nl
  "FinishTodoWebhookUrl": "API address to receive to-do completion messages", // Optional, no need to synchronize pending status, no need to configure
  "WebhookHeaders": {}  // Custom parameters for request headers, optional
}

Message format is as follows: (POST application/json)

{
  "messageId": "Message id",
  "message": "Message content",
  "messageType": 11,    // 11: Workheet system message, 12: Mentions in worksheet discussion, 13: Replies in worksheet discussion, 14: To-do message in workflow (fill in, approval, system message with sending record), 15: Workflow system message without sending record
  "messageTypeV2": 11,  // 11: Workheet system message, 12: Mentions in worksheet discussion, 13: Replies in worksheet discussion, 14: To-do message in workflow (fill in, approval), 15: Workflow system message without sending record, 16: Workflow system message with sending record
  "appId": "App id",
  "appName": "App name",
  "attachments": ["Attachment link|Attachment name"], // Images can be used directly, document types currently only serve as a reminder of the number of attachments (cannot be downloaded directly)
  "redirectUrl": "Redirect url",   //  Corresponding to the landing page for message processing in the HAP system
  "targets": ["User id"], // Third-party user id in single sign-on
  "projectId": "Organization Id",
  "createUserId": "Creator", // Third-party user id in single sign-on,system triggered message is empty
  "processId": "Process id" // Only workflow messages have value
}

The format of the completed to-do message is as follows: (POST application/json)

{
  "messageId": "Message id",
  "projectId": "Organization Id",
  "userId": "Creator", // Third-party user id in single sign-on
  "processId": "Process id"
}

Mount configuration file

Add the following to the docker-compose.yaml volumes of the microservice application:
```
- ./volume/integrate/appextensions.json:/usr/local/MDPrivateDeployment/integrate/appextensions.json
```
Restart the HAP microservice application