#663 - Standardized API endpoint to serve configuration for the frontend

- add endpoint to swagger docu
- convert the two threshold paramters to int

Author: michael-82

src/main/java/de/numcodex/feasibility_gui_backend/settings/SettingsController.java

@@ -28,10 +28,10 @@ public class SettingsController {
   private String dseUrl;
 
   @Value("${app.privacy.threshold.sites}")
-  private String lowerboundaryLocationResult;
+  private int lowerboundaryLocationResult;
 
   @Value("${app.privacy.threshold.results}")
-  private String lowerboundardyPatientResult;
+  private int lowerboundardyPatientResult;
 
   @Value("${app.privacy.quota.read.resultDetailedObfuscated.interval}")
   private String pollingInterval;
@@ -47,7 +47,7 @@ public class SettingsController {
 
 
   @GetMapping("/.settings")
-  public Map<String, String> getSettings() {
+  public Map<String, Object> getSettings() {
     return Map.of(
         KEY_DSE_URL, dseUrl,
         KEY_LOCATION_RESULT_LOWERBOUNDARY, lowerboundaryLocationResult,

src/main/resources/static/v3/api-docs/swagger.yaml

@@ -869,13 +869,27 @@ paths:
       operationId: ''
       responses:
         200:
-          description: Successful health information.
+          description: Successful build information.
           content:
             application/vnd.spring-boot.actuator.v3+json:
               schema:
                 $ref: "#/components/schemas/SystemInfo"
       tags:
         - intrinsics
+  /.settings:
+    get:
+      summary: Offers config settings needed by the frontend.
+      description: ''
+      operationId: ''
+      responses:
+        200:
+          description: Successful health information.
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/SettingsInfo"
+      tags:
+        - intrinsics
 components:
   schemas:
     Dataquery:
@@ -1668,6 +1682,43 @@ components:
           $ref: "#/components/schemas/BuildInfo"
         terminology:
           $ref: "#/components/schemas/Terminology"
+    SettingsInfo:
+      type: object
+      properties:
+        ccdlVersion:
+          type: string
+          examples:
+            - v1
+        pollingintervall:
+          type: string
+          format: duration
+          examples:
+            - PT10S
+        dsePatientProfileUrl:
+          type: string
+          examples:
+            - https://www.medizininformatik-initiative.de/fhir/core/modul-person/StructureDefinition/PatientPseudonymisiert
+        uiBackendApiUrl:
+          type: string
+          examples:
+            - /api/v5
+        lowerboundarypatientresult:
+          type: number
+          examples:
+            - 20
+        proposalPortalLink:
+          type: string
+          examples:
+            - https://antrag.forschen-fuer-gesundheit.de
+        lowerboundarylocationresult:
+          type: number
+          examples:
+            - 3
+        pollingtime:
+          type: string
+          format: duration
+          examples:
+            - PT10S
   securitySchemes:
     dataportal_auth:
       type: oauth2