Add support for duplicating assets

src/main/java/be/seeseepuff/pcinv/controllers/WebController.java

@@ -226,6 +226,27 @@ public class WebController {
         return "create_asset";
     }
 
+    /**
+     * Shows a view where the user can edit an existing asset.
+     *
+     * @param qr The QR code of the asset to edit.
+     */
+    @GetMapping("/duplicate/{qr}")
+    public String duplicate(Model model, @PathVariable long qr) {
+        model.addAttribute(TIME, System.currentTimeMillis());
+        var asset = assetService.getAssetByQr(qr);
+        if (asset == null) {
+            throw new RuntimeException("Asset not found");
+        }
+        String assetType = asset.getAsset().getType();
+        model.addAttribute(ACTION, "duplicate");
+        model.addAttribute(ASSET, asset);
+        model.addAttribute(DESCRIPTORS, assetService.getAssetDescriptorTree(assetType));
+        model.addAttribute(DESCRIPTOR, assetService.getAssetDescriptor(assetType));
+        model.addAttribute(INPUT_LIST, assetService.getInputList(assetType));
+        return "create_asset";
+    }
+
     /**
      * Actually edits an asset based on the form data submitted.
      *

src/main/java/be/seeseepuff/pcinv/services/AssetService.java

@@ -12,6 +12,8 @@ import be.seeseepuff.pcinv.repositories.GenericAssetRepository;
 import be.seeseepuff.pcinv.repositories.WorkLogRepository;
 import jakarta.persistence.EntityManager;
 import lombok.RequiredArgsConstructor;
+import lombok.SneakyThrows;
+import org.modelmapper.ModelMapper;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -54,6 +56,30 @@ public class AssetService {
         return getRepositoryFor(genericAsset.getType()).findByAsset(genericAsset);
     }
 
+    /**
+     * Retrieves an asset by its QR code and duplicates the object.
+     *
+     * @param qr the QR code of the asset to retrieve
+     * @return the Asset associated with the given QR code, or null if no duplicate is found
+     */
+    @SneakyThrows
+    public Asset getAssetDuplicateByQr(long qr) {
+        var mapper = new ModelMapper();
+        var originalGenericAsset = genericRepository.findByQr(qr);
+        if (originalGenericAsset == null) {
+            throw new IllegalArgumentException("No asset found with QR code: " + qr);
+        }
+        var originalAsset = getRepositoryFor(originalGenericAsset.getType()).findByAsset(originalGenericAsset);
+
+        var genericAsset = mapper.map(originalGenericAsset, GenericAsset.class);
+        genericAsset.setId(0); // Reset ID to create a new instance
+        genericAsset.setQr(0);
+        var asset = mapper.map(originalAsset, originalAsset.getClass());
+        asset.setAsset(genericAsset);
+
+        return asset;
+    }
+
     /**
      * Retrieves all assets of a specific type.
      *