Added a DTO for licenses

src/main/java/me/braydon/license/controller/LicenseController.java

@@ -5,6 +5,7 @@ import com.google.gson.JsonObject;
 import jakarta.servlet.http.HttpServletRequest;
 import lombok.NonNull;
 import me.braydon.license.LicenseServer;
+import me.braydon.license.dto.LicenseDTO;
 import me.braydon.license.exception.APIException;
 import me.braydon.license.model.License;
 import me.braydon.license.service.LicenseService;
@@ -56,13 +57,17 @@ public final class LicenseController {
                 throw new APIException(HttpStatus.BAD_REQUEST, "Invalid request body");
             }
             // Check the license
-            service.check(
+            License license = service.check(
                 key.getAsString(),
                 product.getAsString(),
                 ip,
                 hwid.getAsString()
             );
-            return ResponseEntity.ok().build(); // Return OK
+            // Return OK with the license DTO
+            return ResponseEntity.ok(new LicenseDTO(
+                license.getDescription(),
+                license.getDuration()
+            ));
         } catch (APIException ex) { // Handle the exception
             return ResponseEntity.status(ex.getStatus())
                        .body(Map.of("error", ex.getLocalizedMessage()));

src/main/java/me/braydon/license/dto/LicenseDTO.java

@@ -0,0 +1,27 @@
+package me.braydon.license.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.ToString;
+import me.braydon.license.model.License;
+
+/**
+ * A data transfer object for a {@link License}.
+ *
+ * @author Braydon
+ */
+@AllArgsConstructor @Getter @ToString
+public class LicenseDTO {
+    /**
+     * The optional description of this license.
+     */
+    private String description;
+    
+    /**
+     * The duration that this licensee is valid for.
+     * <p>
+     * If -1, the license will be permanent.
+     * </p>
+     */
+    private long duration;
+}

src/main/java/me/braydon/license/service/LicenseService.java

@@ -95,11 +95,13 @@ public final class LicenseService {
      * @param product the product of the license
      * @param ip      the ip using the license
      * @param hwid    the hwid using the license
+     * @return the checked license
      * @throws APIException if there was an error checking the license
      * @see License for license
      */
-    public void check(@NonNull String key, @NonNull String product,
-                      @NonNull String ip, @NonNull String hwid) throws APIException {
+    @NonNull
+    public License check(@NonNull String key, @NonNull String product,
+                         @NonNull String ip, @NonNull String hwid) throws APIException {
         Optional<License> optionalLicense = repository.getLicense(BCrypt.hashpw(key, licensesSalt), product); // Get the license
         if (optionalLicense.isEmpty()) { // License key not found
             log.error("License key {} for product {} not found", key, product); // Log the error
@@ -112,5 +114,6 @@ public final class LicenseService {
         license.use(ip, ipsSalt, hwid); // Use the license
         repository.save(license); // Save the used license
         log.info("License key {} for product {} was used by {} ({})", key, product, ip, hwid);
+        return license;
     }
 }