# Plant-User Mapping
Every plant operator created will be linked to one or more plants under an urban local body (ULB).
## Plant-User Mapping Flow
* When a plant operator logs in to the system, the top bar is populated with a dropdown which shows a list of plants this user (plant operator) is linked to.
* By default, the option "All Plants" is selected.
* When a user selects a plant, lets say, plant A, all the data of plant A will be shown in the app, whether it's inbox, view past results page, home page, etc.
* Whenever a change in a plant is detected through the dropdown, the app is redirected to the landing screen.
* A plant operator is a sanitation worker; while creating a sanitation worker, you can link the sanitation worker to one or multiple plants.
* Data such as a list of the current user's plants and active plant is stored in session storage, and is available to use within the app.
## How a Plant's Dropdown is Populated
* Whenever a plant operator logs in, he/she can make a call to this API endpoint "/pqm-service/plant/user/v1/\_search" to get a list of the plants that the user is linked to .
* Sample payload:
```json
{
"RequestInfo": {
"apiId": "asset-services",
"ver": null,
"ts": null,
"action": null,
"did": null,
"key": null,
"msgId": "search with from and to values",
"authToken": "{{access_token}}",
"correlationId": null,
"userInfo": {
"id": "1",
"userName": null,
"name": null,
"type": null,
"mobileNumber": null,
"emailId": null,
"roles": null,
"uuid": "d7867ef2-d046-4361-9a82-94c35c98416e"
}
},
"plantUserSearchCriteria": {
"ids": [],
"tenantId": "pg",
"plantCodes": [
],
"individualIds": ["d7867ef2-d046-4361-9a82-94c35c98416e"],
"additionalDetails": {}
},
"pagination": {}
}
```
* Send the user's individual id/uuid in the request object.
* Curl for the above API call:
```json
curl --location 'http://localhost:7008/pqm-service/plant/user/v1/_search' \
--header 'Content-Type: application/json' \
--data '{
"RequestInfo": {
"apiId": "asset-services",
"ver": null,
"ts": null,
"action": null,
"did": null,
"key": null,
"msgId": "search with from and to values",
"authToken": "",
"correlationId": null,
"userInfo": {
"id": "1",
"userName": null,
"name": null,
"type": null,
"mobileNumber": null,
"emailId": null,
"roles": null,
"uuid": "d7867ef2-d046-4361-9a82-94c35c98416e"
}
},
"plantUserSearchCriteria": {
"ids": [],
"tenantId": "pg",
"plantCodes": [
],
"individualIds": ["d7867ef2-d046-4361-9a82-94c35c98416e"],
"additionalDetails": {}
},
"pagination": {}
}'
```
* You will get a list of plants in the response which is used to populate the dropdown.
* By default, the "All Plants" option is selected which is the default behaviour.
* When a user selects a particular plant, it becomes active and one can filter the data (all tests shown in the app) by that plant's code in the UI.
* UI for the top bar:
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