README.md

## Client Module

### Commandline Client
The sdk comes with a commandline client to be able to use the sdk without any coding.

#### Setup & Build
1. Build project root wih ``./mvnw clean package``
2. Go to client/target and find a runnable jar ``client-VERSION.jar``
3. Provide config either via env-var or by loading it programmatically:
   1. set environment variable ``FIT_CONNECT_CONFIG``:
      1. Linux/MacOS: ``export FIT_CONNECT_CONFIG=path/to/config.yml``
      2. Windows: ``set FIT_CONNECT_CONFIG=C:\Path\To\config.yml``
   2. Initialize client via ApplicationConfigLoader:
      ````java
      var config = ApplicationConfigLoader.loadConfig(Path.of("absolute/path/to/config.yml"));
      var senderClient = ClientFactory.senderClient(config);
      ````
5. run client with ``java -jar client-VERSION.jar [COMMAND] [OPTIONS]``

#### SEND Example
The send command submits a new submission to a destination. Apart from optional attachments, all options are mandatory.

````sh
java -jar client-1.0-SNAPSHOT.jar send 
    --destinationId=1b7d1a24-a6c8-4050-bb71-ae3749ec432f 
    --serviceName=Test 
    --leikaKey=urn:de:fim:leika:leistung:99400048079000 
    --attachments=C:/path/to/attachments/dummy1.pdf, C:/path/to/attachments/dummy2.pdf 
    --data="{foo: 'bar'}" 
    --dataType=JSON
````
> Hint: copy example on one line for execution !

#### LIST Submissions Example
The list command lists all submissionIds for a given destinationID.
````sh
java -jar client-1.0-SNAPSHOT.jar list --destinationID=1b7d1a24-a6c8-4050-bb71-ae3749ec432f 
````
#### GET Single Submission Example
The get command loads a submission by `submissionId` and stores data and attachments in the given target location. If no target is
set, the cmd-client saves the data into in a folder named by the `submissionId` within the working dir of the runnable
jar.

````sh
java -jar client-1.0-SNAPSHOT.jar get --submissionID=cc9b9b3c-d4b1-4ac7-a70b-e7ca76e88608 --target=Users/submissions/data
````

#### Usage And Commands

````shell
Usage: <main class> [command] [command options]
  Commands:
    send      Send a submission
      Usage: send [options]
        Options:
          --attachments
            Attachments as list of paths
            Default: []
        * --data
            JSON or XML data as string
        * --dataType
            Data mime type (JSON/XML), default JSON
            Default: JSON
            Possible Values: [JSON, XML]
        * --destinationId
            Unique destination identifier - UUID format
        * --leikaKey
            The LeikaKey of the service type
        * --serviceName
            Name of the service type

    list      Lists available submissions
      Usage: list [options]
        Options:
        * --destinationId
            Unique destination identifier - UUID format

    get      Fetches one submission by id
      Usage: get [options]
        Options:
        * --submissionId
            Unique submission identifier - UUID format
          --target
            Target folder where attachments and data is written to
````

### API Flow

The ClientFactory provides fluent API clients for both **Sender** and **Subscriber**.

As the flow chart below shows, the fluent client guides through all essential calls in order to hand in a correct 
**submission** as well as receive submissions on the subscriber side.

#### Api client flow for sending a submission

For the actual sender client those calls look like this:


<table>
<tr>
<th>Workflow</th>
<th>Java sample calls</th>
</tr>
<tr>
<td>

```mermaid

flowchart TD

A[Create Client] --> B(Provide DestinationID)
B -->|next| C[Add Service Type]
C -->|next| D[Add Attachments]
D -->|next| E[Add Data]
C -->|next| E[Add Data]
E -->|send| F[SubmissionForPickup]
```

</td>
<td>

```java

ClientFactory.senderClient()
        .withDestination(UUID.randomUUID())
        .withServiceType("ServiceName", "leika:key:service")
        .withAttachments(attachments)
        .withJsonData("{ caseSpecific: 'Data' }")
        .submit();
```

</td>
</tr>
</table>

#### Api client flow for subscribing to a submission

<table>
<tr>
<th>Workflow</th>
<th>Java sample calls</th>
</tr>
<tr>
<td>

```mermaid
flowchart TD

A[Create Client] --> B(Poll List ofAvailable Submissions)
A[Create Client] --> C(Request Submission by ID)
B -->|next| C[Request Submission by ID]
C -->|get| D[Attachments]
C -->|get| E[Metadata]
C -->|get| F[Data]

```

</td>
<td>

```java

    var client = ClientFactory.subscriberClient();

    var submissions = client.getAvailableSubmissions(destinationId);
    // filter submission list for requested one ...
            
    var submission = client.requestSubmission(submissionId)
    submission.getAttachments();
    submission.getMetadata();
    submission.getData();
```

</td>
</tr>
</table>