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

- Add SettingsController and /.settings endpoint
- add some passthrough config params to application.yml

Author: michael-82

src/main/java/de/numcodex/feasibility_gui_backend/config/WebSecurityConfig.java

@@ -51,6 +51,7 @@ public class WebSecurityConfig {
   public static final String PATH_CODEABLE_CONCEPT = "/codeable-concept";
   public static final String PATH_SWAGGER_UI = "/swagger-ui/**";
   public static final String PATH_SWAGGER_CONFIG = "/v3/api-docs/**";
+  public static final String PATH_SETTINGS = "/.settings";
   @Value("${app.keycloakAllowedRole}")
   private String keycloakAllowedRole;
 
@@ -97,6 +98,7 @@ public SecurityFilterChain apiFilterChain(
       Converter<Jwt, ? extends AbstractAuthenticationToken> authenticationConverter) throws Exception {
 
     http.authorizeHttpRequests(authorize -> authorize
+            .requestMatchers(PathPatternRequestMatcher.withDefaults().matcher(PATH_SETTINGS)).permitAll()
             .requestMatchers(PathPatternRequestMatcher.withDefaults().matcher(PATH_SWAGGER_CONFIG)).permitAll()
             .requestMatchers(PathPatternRequestMatcher.withDefaults().matcher(PATH_API + PATH_ACTUATOR_HEALTH)).permitAll()
             .requestMatchers(PathPatternRequestMatcher.withDefaults().matcher(PATH_API + PATH_ACTUATOR_INFO)).permitAll()

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

@@ -0,0 +1,62 @@
+package de.numcodex.feasibility_gui_backend.settings;
+
+import java.util.Map;
+
+import de.numcodex.feasibility_gui_backend.config.WebSecurityConfig;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.web.bind.annotation.CrossOrigin;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@Slf4j
+@CrossOrigin(origins = "${cors.allowedOrigins}", exposedHeaders = "Location")
+public class SettingsController {
+
+  private static final String KEY_DSE_URL = "dsePatientProfileUrl";
+  private static final String KEY_LOCATION_RESULT_LOWERBOUNDARY = "lowerboundarylocationresult";
+  private static final String KEY_PATIENT_RESULT_LOWERBOUNDARY = "lowerboundarypatientresult";
+  private static final String KEY_POLLING_INTERVAL = "pollingintervall";
+  private static final String KEY_POLLING_TIME = "pollingtime";
+  private static final String KEY_PORTAL_LINK = "proposalPortalLink";
+  private static final String KEY_CCDL_VERSION = "ccdlVersion";
+  private static final String KEY_REST_API_PATH = "uiBackendApiUrl";
+
+
+  @Value("${app.guiInfo.dsePatientProfileUrl}")
+  private String dseUrl;
+
+  @Value("${app.privacy.threshold.sites}")
+  private String lowerboundaryLocationResult;
+
+  @Value("${app.privacy.threshold.results}")
+  private String lowerboundardyPatientResult;
+
+  @Value("${app.privacy.quota.read.resultDetailedObfuscated.interval}")
+  private String pollingInterval;
+
+  @Value("${app.privacy.quota.read.resultSummary.pollingInterval}")
+  private String pollingTime = "PT20S";
+
+  @Value("${app.guiInfo.portalLink}")
+  private String portalLink;
+
+  @Value("${app.guiInfo.ccdlVersion}")
+  private String ccdlVersion = "version";
+
+
+  @GetMapping("/.settings")
+  public Map<String, String> getSettings() {
+    return Map.of(
+        KEY_DSE_URL, dseUrl,
+        KEY_LOCATION_RESULT_LOWERBOUNDARY, lowerboundaryLocationResult,
+        KEY_PATIENT_RESULT_LOWERBOUNDARY, lowerboundardyPatientResult,
+        KEY_POLLING_INTERVAL, pollingInterval,
+        KEY_POLLING_TIME, pollingTime,
+        KEY_PORTAL_LINK, portalLink,
+        KEY_CCDL_VERSION, ccdlVersion,
+        KEY_REST_API_PATH, WebSecurityConfig.PATH_API
+    );
+  }
+}

src/main/resources/application.yml

@@ -73,6 +73,10 @@ app:
   queryResultExpiry: ${QUERYRESULT_EXPIRY:PT1M}
   maxSavedQueriesPerUser: ${MAX_SAVED_QUERIES_PER_USER:10}
   purgeExpiredQueries: ${PURGE_EXPIRED_QUERIES:0 0 * * * *}
+  guiInfo:
+    ccdlVersion: ${CCDL_VERSION:unknown}
+    portalLink: ${PORTAL_LINK:https://antrag.forschen-fuer-gesundheit.de}
+    dsePatientProfileUrl: ${DSE_PATIENT_PROFILE_URL:https://www.medizininformatik-initiative.de/fhir/core/modul-person/StructureDefinition/PatientPseudonymisiert}
   export:
     csv:
       delimiter: ${EXPORT_CSV_DELIMITER:;}