feat: add application version info retrieval functionality

Author: mjabascal10

backend/src/main/java/com/park/utmstack/config/Constants.java

@@ -162,6 +162,9 @@ public final class Constants {
     public static final String API_KEY_HEADER = "Utm-Api-Key";
     public static final List<String> API_ENDPOINT_IGNORE = Collections.emptyList();
 
+    // Application version file
+    public static final String APP_VERSION_FILE = "/utmstack//version/version.json";
+
     private Constants() {
     }
 }

backend/src/main/java/com/park/utmstack/service/app_info/AppInfoService.java

@@ -0,0 +1,31 @@
+package com.park.utmstack.service.app_info;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.park.utmstack.service.dto.app_info.AppInfoDto;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+
+import java.io.File;
+import java.io.IOException;
+
+import static com.park.utmstack.config.Constants.APP_VERSION_FILE;
+
+@Service
+@Slf4j
+public class AppInfoService {
+
+    private static final String CLASSNAME = "AppInfoService";
+
+    public AppInfoDto loadVersionInfo() throws Exception {
+        final String ctx = "loadVersionInfo";
+        try {
+            ObjectMapper mapper = new ObjectMapper();
+            return mapper.readValue(new File(APP_VERSION_FILE), AppInfoDto.class);
+        } catch (IOException e) {
+            log.error("{}: An error occurred while reading the version file: {}", CLASSNAME + "." + ctx, e.getMessage(), e);
+            throw new RuntimeException("An error occurred while reading the version file");
+        }
+
+    }
+}
+

backend/src/main/java/com/park/utmstack/service/dto/app_info/AppInfoDto.java

@@ -0,0 +1,15 @@
+package com.park.utmstack.service.dto.app_info;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@JsonIgnoreProperties(ignoreUnknown = true)
+public class AppInfoDto {
+    private String version;
+    private String edition;
+}

backend/src/main/java/com/park/utmstack/web/rest/app_info/AppInfoResource.java

@@ -0,0 +1,22 @@
+package com.park.utmstack.web.rest.app_info;
+
+import com.park.utmstack.service.app_info.AppInfoService;
+import com.park.utmstack.service.dto.app_info.AppInfoDto;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api/info")
+@RequiredArgsConstructor
+public class AppInfoResource {
+
+    private final AppInfoService appInfoService;
+
+    @GetMapping("/version")
+    public ResponseEntity<AppInfoDto> getInfo() throws Exception {
+        return ResponseEntity.ok(appInfoService.loadVersionInfo());
+    }
+}