implement /window/{windowId}/{documentId}/duplicate

#54

src/main/java/de/metas/ui/web/window/controller/WindowRestController.java

@@ -14,6 +14,7 @@
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PatchMapping;
 import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
@@ -254,7 +255,7 @@ else if (documentPath.isSingleIncludedDocument())
 	/**
 	 * 
 	 * @param windowIdStr
-	 * @param documentIdStr the string to identify the document to be returned. May also be {@link DocumentId#NEW_ID_STRING}, if a new record shall be created. 
+	 * @param documentIdStr the string to identify the document to be returned. May also be {@link DocumentId#NEW_ID_STRING}, if a new record shall be created.
 	 * @param advanced
 	 * @param events
 	 * @return
@@ -310,8 +311,8 @@ private List<JSONDocument> patchDocument0(final DocumentPath documentPath, final
 	{
 		final IDocumentChangesCollector changesCollector = Execution.getCurrentDocumentChangesCollectorOrNull();
 		documentCollection.forDocumentWritable(
-				documentPath, 
-				changesCollector, 
+				documentPath,
+				changesCollector,
 				document -> {
 					document.processValueChanges(events, REASON_Value_DirectSetFromCommitAPI);
 					changesCollector.setPrimaryChange(document.getDocumentPath());
@@ -326,6 +327,20 @@ private List<JSONDocument> patchDocument0(final DocumentPath documentPath, final
 		return jsonDocumentEvents;
 	}
 
+	@PostMapping("/{windowId}/{documentId}/duplicate")
+	public JSONDocument duplicate(
+			@PathVariable("windowId") final String windowIdStr,
+			@PathVariable("documentId") final String documentIdStr,
+			@RequestParam(name = PARAM_Advanced, required = false, defaultValue = PARAM_Advanced_DefaultValue) final boolean advanced)
+	{
+		userSession.assertLoggedIn();
+
+		final DocumentPath fromDocumentPath = DocumentPath.rootDocumentPath(WindowId.fromJson(windowIdStr), DocumentId.of(documentIdStr));
+
+		final Document documentCopy = documentCollection.duplicateDocument(fromDocumentPath);
+		return JSONDocument.ofDocument(documentCopy, newJSONOptions().setShowAdvancedFields(advanced).build());
+	}
+
 	@DeleteMapping("/{windowId}/{documentId}")
 	public List<JSONDocument> deleteRootDocument(
 			@PathVariable("windowId") final String windowIdStr //
@@ -618,7 +633,6 @@ private JSONDocumentActionsList getDocumentActions(final DocumentPath documentPa
 		});
 	}
 
-
 	@GetMapping(value = "/{windowId}/{documentId}/{tabId}/{rowId}/references")
 	public JSONDocumentReferencesGroup getDocumentReferences(
 			@PathVariable("windowId") final String windowIdStr,

src/main/java/de/metas/ui/web/window/model/DocumentCollection.java

@@ -13,11 +13,19 @@
 import org.adempiere.ad.expression.api.IExpressionEvaluator.OnVariableNotFound;
 import org.adempiere.ad.expression.api.ILogicExpression;
 import org.adempiere.ad.expression.api.LogicExpressionResult;
+import org.adempiere.ad.persistence.TableModelLoader;
+import org.adempiere.ad.trx.api.ITrx;
 import org.adempiere.exceptions.AdempiereException;
+import org.adempiere.model.CopyRecordFactory;
+import org.adempiere.model.CopyRecordSupport;
+import org.adempiere.model.InterfaceWrapperHelper;
+import org.adempiere.model.PlainContextAware;
 import org.adempiere.model.RecordZoomWindowFinder;
 import org.adempiere.util.Check;
 import org.adempiere.util.lang.IAutoCloseable;
 import org.adempiere.util.lang.impl.TableRecordReference;
+import org.compiere.model.PO;
+import org.compiere.util.Env;
 import org.compiere.util.Evaluatee;
 import org.compiere.util.Evaluatees;
 import org.slf4j.Logger;
@@ -577,6 +585,29 @@ public void invalidateDocumentByRecordId(final String tableName, final int recor
 			websocketSender.convertAndSend(event.getWebsocketEndpoint(), event);
 		});
 	}
+
+	public Document duplicateDocument(final DocumentPath fromDocumentPath)
+	{
+		final TableRecordReference fromRecordRef = getTableRecordReference(fromDocumentPath);
+
+		final Object fromModel = fromRecordRef.getModel(PlainContextAware.newWithThreadInheritedTrx());
+		final String tableName = InterfaceWrapperHelper.getModelTableName(fromModel);
+		final PO fromPO = InterfaceWrapperHelper.getPO(fromModel);
+
+
+		final PO toPO = TableModelLoader.instance.newPO(Env.getCtx(), tableName, ITrx.TRXNAME_ThreadInherited);
+		PO.copyValues(fromPO, toPO, true);
+		InterfaceWrapperHelper.save(toPO);
+
+		final CopyRecordSupport childCRS = CopyRecordFactory.getCopyRecordSupport(tableName);
+		childCRS.setAD_Window_ID(fromDocumentPath.getAD_Window_ID(-1));
+		childCRS.setParentPO(toPO);
+		childCRS.setBase(true);
+		childCRS.copyRecord(fromPO, ITrx.TRXNAME_ThreadInherited);
+
+		final DocumentPath toDocumentPath = DocumentPath.rootDocumentPath(fromDocumentPath.getWindowId(), DocumentId.of(toPO.get_ID()));
+		return forDocumentReadonly(toDocumentPath, NullDocumentChangesCollector.instance, Function.identity());
+	}
 
 	@Immutable
 	@Value