Add Steam API client, service, controller

Introduce Steam integration: add SteamClientConfig (RestClient bean), SteamApiService (calls GetPlayerSummaries and returns a Player DTO), SteamPlayerSummaryResponse DTO, and SteamTestController (/api/steam/test/{steamId}) for quick testing. Update SecurityConfig to permit the test endpoint and adjust the SecurityFilterChain bean signature. Add Steam API settings: base-url in application.yml and a dev API key in application-dev.yml. Includes basic error logging and optional response handling when no player is found.

src/main/java/core_service/configuration/security/SecurityConfig.java

@@ -27,7 +27,8 @@ public class SecurityConfig {
             "/internal/**",           // Allow internal service communication
             "/actuator/health",
             "/actuator/prometheus",
-            "/error"
+            "/error",
+            "/api/steam/test/**"
     };
 
     private final JwtAuthenticationFilter jwtAuthFilter;
@@ -49,7 +50,7 @@ public class SecurityConfig {
     }
 
     @Bean
-    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
+    public SecurityFilterChain securityFilterChain(HttpSecurity http) {
         http
                 .csrf(AbstractHttpConfigurer::disable)
                 .cors(cors -> cors.configurationSource(corsConfigurationSource()))
@@ -63,4 +64,4 @@ public class SecurityConfig {
 
         return http.build();
     }
-}
+}

src/main/java/core_service/domain/steam_adapter/config/SteamClientConfig.java

@@ -0,0 +1,16 @@
+package core_service.domain.steam_adapter.config;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.client.RestClient;
+
+@Configuration
+public class SteamClientConfig {
+    @Bean
+    public RestClient steamRestClient(@Value("${app.steam.base-url}") String baseUrl) {
+        return RestClient.builder()
+                .baseUrl(baseUrl)
+                .build();
+    }
+}

src/main/java/core_service/domain/steam_adapter/controller/SteamTestController.java

@@ -0,0 +1,32 @@
+package core_service.domain.steam_adapter.controller;
+
+import core_service.domain.steam_adapter.controller.dto.response.SteamPlayerSummaryResponse;
+import core_service.domain.steam_adapter.service.SteamApiService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.Optional;
+
+@RestController
+@RequestMapping("/api/steam/test")
+@RequiredArgsConstructor
+public class SteamTestController {
+
+    private final SteamApiService steamApiService;
+
+    @GetMapping("/{steamId}")
+    public ResponseEntity<?> testSteamConnection(@PathVariable String steamId) {
+
+        Optional<SteamPlayerSummaryResponse.Player> playerOpt = steamApiService.getPlayerSummary(steamId);
+
+        if (playerOpt.isPresent()) {
+            return ResponseEntity.ok(playerOpt.get());
+        } else {
+            return ResponseEntity.notFound().build();
+        }
+    }
+}

src/main/java/core_service/domain/steam_adapter/controller/dto/response/SteamPlayerSummaryResponse.java

@@ -0,0 +1,15 @@
+package core_service.domain.steam_adapter.controller.dto.response;
+
+import java.util.List;
+
+public record SteamPlayerSummaryResponse(SteamResponse response) {
+
+    public record SteamResponse(List<Player> players) {}
+
+    public record Player(
+            String steamid,
+            String personaname,
+            String profileurl,
+            String avatarfull
+    ) {}
+}

src/main/java/core_service/domain/steam_adapter/service/SteamApiService.java

@@ -0,0 +1,45 @@
+package core_service.domain.steam_adapter.service;
+
+import core_service.domain.steam_adapter.controller.dto.response.SteamPlayerSummaryResponse;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+import org.springframework.web.client.RestClient;
+
+import java.util.Optional;
+
+@Slf4j
+@Service
+@RequiredArgsConstructor
+public class SteamApiService {
+
+    private final RestClient steamRestClient;
+
+    @Value("${app.steam.api-key}")
+    private String apiKey;
+
+    public Optional<SteamPlayerSummaryResponse.Player> getPlayerSummary(String steamId) {
+        try {
+            log.info("Fetching Steam profile for SteamID: {}", steamId);
+
+            SteamPlayerSummaryResponse response = steamRestClient.get()
+                    .uri(uriBuilder -> uriBuilder
+                            .path("/ISteamUser/GetPlayerSummaries/v0002/")
+                            .queryParam("key", apiKey)
+                            .queryParam("steamids", steamId)
+                            .build())
+                    .retrieve()
+                    .body(SteamPlayerSummaryResponse.class);
+
+            if (response != null && response.response() != null && !response.response().players().isEmpty()) {
+                return Optional.of(response.response().players().get(0));
+            }
+
+        } catch (Exception e) {
+            log.error("Error communicating with Steam API for SteamID: {}", steamId, e);
+        }
+
+        return Optional.empty();
+    }
+}

src/main/resources/application.yml

@@ -42,6 +42,7 @@ app:
     allowed-origins: "https://tbp.andreas-dahm.eu"
   steam:
     api-key: ${STEAM_API_KEY}
+    base-url: https://api.steampowered.com
     playerService-url: https://api.steampowered.com/IPlayerService/GetOwnedGames/v1/
     storeService-url: https://api.steampowered.com/IStoreService/GetAppList/v1/
     imageService-url: https://cdn.cloudflare.steamstatic.com/steam/apps/