## VRAPoten API v0.1.1
[<< Home](https://git.akkerweb.nl/FarmMaps/Documentatie/wiki/Home)  

FarmMaps is an asynchronous architecture, the API flow keeps this in mind.
The API expects that all data is already processed and available provided, for example through the normal FarmMaps flow.

For the currently available public FarmMaps API you can take a look at swagger: http://farmmaps.awtest.nl/swagger/index.html

**Input preperation**
* VRAPoten requires specific input which needs to be provided by the FarmMaps API or user interface.
    * You can activate the VRAPotenTask with the Task API, passing the just created cropfield item code as a parameter.
* Users can upload their own soilmaps if needed. (in case of when FarmMaps has not processed the required data).
    * The file API can be used for this.

**Users can poll the task api to see if a task is completed**  
**This can be achieved with the task execution id obtained from calling the 'ItemTask' API.**  
[Poll task status](https://git.akkerweb.nl/FarmMaps/Documentatie/wiki/Polling-task-status)  

### API flow
* Authenticate User
* *Create cropfield through FarmMaps API (optioneel)*
    * Item 'FOLDER' must be created for parent to cropfields.
    * Item 'vnd.farmmaps.itemtype.cropfield' must be created with its data as specified in the api.
    * Task 'vnd.farmmaps.task.workflow' needs to be executed to aggregate all needed data.
        * This is an asynchronous process and can take a while before all data is collected in FarmMaps.
* Upload own soil data (optioneel)
* Task 'vnd.farmmaps.task.vrapoten' must be executed to create an appliance map.
* Task 'vnd.farmmaps.task.taskmap' must be executed to create a taskmap.
* Download item data (tiff of shape)

### Steps
###### Authentication 
[Authentication](https://git.akkerweb.nl/FarmMaps/Documentatie/wiki/Authentication)

###### Create cropfield with FarmMaps API (optional)
[Create Cropfield](https://git.akkerweb.nl/FarmMaps/Documentatie/wiki/Create-Cropfield)

###### Uploading own data (optional)
[Upload Data](https://git.akkerweb.nl/FarmMaps/Documentatie/wiki/Upload-Data)

###### Creating appliance maps
Execute the VRAPotenTask with the item code of the cropfield as parameter inside {code}.  
Use the input map code inside {itemCode}, specifying an inputCode is optional.  
In case of no specified inputCode the BOFEK data is looked up and if it could not be found the task gives an error.

> Request
```javascript
POST /api/v1/items/{code}/tasks
{
  "taskType": "vnd.farmmaps.task.vrapoten",
  "attributes": {
    "inputCode": "{itemCode}",
    "meanDensity": "30",
    "variation": "20"
  }
}
```  
> Response 201
```javascript
{
  "code": "string",
  "taskType": "vnd.farmmaps.task.workflow",
  "delay": "",
  "attributes": {
    "additionalProp1": "string",
    "additionalProp2": "string",
    "additionalProp3": "string"
  }
}
```

Response 400 Tasktype not found  
Response 401 Not authenticated  
Response 403 No WRITE permissions in item  
Response 404 Item not found  

###### Create taskmap
[Create Taskmap](https://git.akkerweb.nl/FarmMaps/Documentatie/wiki/Create-Taskmap)

###### Download the data
In case the data is available it can be downloaded with the File API.
> Request
```javascript
GET /api/v1/items/{itemcode}/data
```