fix(editor): Fix copy/paste issue when switch node is in workflow (#8103)

## Summary
Fix bug where copy/pasting a node breaks the view. Issue seems to be
that copied workflow does not have Switch node when workflow is
rerendering..

<img width="1942" alt="Screenshot 2023-12-19 at 18 16 23"
src="https://github.com/n8n-io/n8n/assets/4711238/ad53b8ae-3693-4733-8f6b-7bc9e7b9d216">




## Related tickets and issues
[Linear ticket
ADO-1504](https://linear.app/n8n/issue/ADO-1504/unwanted-nodes-connections-after-copypaste-of-n8n-form-trigger)


## Review / Merge checklist
- [X] PR title and summary are descriptive. **Remember, the title
automatically goes into the changelog. Use `(no-changelog)` otherwise.**
([conventions](https://github.com/n8n-io/n8n/blob/master/.github/pull_request_title_conventions.md))
- [ ] [Docs updated](https://github.com/n8n-io/n8n-docs) or follow-up
ticket created.
- [x] Tests included.
> A bug is not considered fixed, unless a test is added to prevent it
from happening again.
   > A feature is not complete without tests.

cypress/e2e/10-undo-redo.cy.ts

@@ -325,4 +325,33 @@ describe('Undo/Redo', () => {
 				WorkflowPage.getters.nodeConnections().should('have.length', 2);
 			});
 	});
+
+	it('should be able to copy and paste pinned data nodes in workflows with dynamic Switch node', () => {
+		cy.fixture('Test_workflow_form_switch.json').then((data) => {
+			cy.get('body').paste(JSON.stringify(data));
+		});
+		WorkflowPage.actions.zoomToFit();
+
+		WorkflowPage.getters.canvasNodes().should('have.length', 2);
+		WorkflowPage.getters.nodeConnections().should('have.length', 1);
+		cy.get(WorkflowPage.getters.getEndpointSelector('input', 'Switch')).should('have.length', 1);
+		cy.get(WorkflowPage.getters.getEndpointSelector('input', 'Switch'))
+					.should('have.css', 'left', `637px`)
+					.should('have.css', 'top', `501px`);
+
+		cy.fixture('Test_workflow_form_switch.json').then((data) => {
+			cy.get('body').paste(JSON.stringify(data));
+		});
+		WorkflowPage.getters.canvasNodes().should('have.length', 4);
+		WorkflowPage.getters.nodeConnections().should('have.length', 2);
+
+		WorkflowPage.actions.hitUndo();
+
+		WorkflowPage.getters.canvasNodes().should('have.length', 2);
+		WorkflowPage.getters.nodeConnections().should('have.length', 1);
+		cy.get(WorkflowPage.getters.getEndpointSelector('input', 'Switch')).should('have.length', 1);
+		cy.get(WorkflowPage.getters.getEndpointSelector('input', 'Switch'))
+					.should('have.css', 'left', `637px`)
+					.should('have.css', 'top', `501px`);
+	});
 });

cypress/fixtures/Test_workflow_form_switch.json

@@ -0,0 +1,78 @@
+{
+  "name": "My workflow 8",
+  "nodes": [
+    {
+      "parameters": {
+        "path": "d1cba915-ca18-4425-bcfb-133205fc815a",
+        "formTitle": "test",
+        "formFields": {
+          "values": [
+            {
+              "fieldLabel": "test"
+            }
+          ]
+        },
+        "options": {}
+      },
+      "id": "9e685367-fb94-4376-a9a4-7f311d9f7e2d",
+      "name": "n8n Form Trigger",
+      "type": "n8n-nodes-base.formTrigger",
+      "typeVersion": 2,
+      "position": [
+        620,
+        580
+      ],
+      "webhookId": "d1cba915-ca18-4425-bcfb-133205fc815a"
+    },
+    {
+      "parameters": {},
+      "id": "0f4dfe66-51c0-4378-9eab-680f8140a572",
+      "name": "Switch",
+      "type": "n8n-nodes-base.switch",
+      "typeVersion": 2,
+      "position": [
+        800,
+        580
+      ]
+    }
+  ],
+  "pinData": {
+    "n8n Form Trigger": [
+      {
+        "json": {
+          "name": "First item",
+          "code": 1
+        }
+      },
+      {
+        "json": {
+          "name": "Second item",
+          "code": 2
+        }
+      }
+    ]
+  },
+  "connections": {
+    "n8n Form Trigger": {
+      "main": [
+        [
+          {
+            "node": "Switch",
+            "type": "main",
+            "index": 0
+          }
+        ]
+      ]
+    }
+  },
+  "active": false,
+  "settings": {
+    "executionOrder": "v1"
+  },
+  "versionId": "d6c14bc8-a69f-47bb-b5ba-fe6e9db0a3a4",
+  "id": "UQSimcMQJGbTeTLG",
+  "meta": {
+    "instanceId": "a786b722078489c1fa382391a9f3476c2784761624deb2dfb4634827256d51a0"
+  },
+  "tags": []
+}

cypress/pages/workflow.ts

@@ -351,9 +351,6 @@ export class WorkflowPage extends BasePage {
 		hitCopy: () => {
 			cy.get('body').type(META_KEY, { delay: 500, release: false }).type('c');
 		},
-		hitPaste: () => {
-			cy.get('body').type(META_KEY, { delay: 500, release: false }).type('P');
-		},
 		hitPinNodeShortcut: () => {
 			cy.get('body').type('p');
 		},

packages/editor-ui/src/components/Node.vue

@@ -377,9 +377,10 @@ export default defineComponent({
 					styles['--configurable-node-input-count'] = nonMainInputs.length + spacerCount;
 				}
 
-				const outputs =
+				let outputs = [] as Array<ConnectionTypes | INodeOutputConfiguration>;
-					NodeHelpers.getNodeOutputs(this.workflow, this.node, this.nodeType) ||
+				if (this.workflow.nodes[this.node.name]) {
-					([] as Array<ConnectionTypes | INodeOutputConfiguration>);
+					outputs = NodeHelpers.getNodeOutputs(this.workflow, this.node, this.nodeType);
+				}
 
 				const outputTypes = NodeHelpers.getConnectionTypes(outputs);
 

packages/editor-ui/src/stores/nodeTypes.store.ts

@@ -96,6 +96,9 @@ export const useNodeTypesStore = defineStore(STORES.NODE_TYPES, {
 		},
 		isConfigNode() {
 			return (workflow: Workflow, node: INode, nodeTypeName: string): boolean => {
+				if (!workflow.nodes[node.name]) {
+					return false;
+				}
 				const nodeType = this.getNodeType(nodeTypeName);
 				if (!nodeType) {
 					return false;