feat: Human in the loop section (#12883)

Co-authored-by: Dana <152518854+dana-gill@users.noreply.github.com>
Co-authored-by: Jonathan Bennetts <jonathan.bennetts@gmail.com>

cypress/e2e/4-node-creator.cy.ts

@@ -571,4 +571,13 @@ describe('Node Creator', () => {
 
 		addVectorStoreToolToParent('In-Memory Vector Store', AGENT_NODE_NAME);
 	});
+
+	it('should insert node to canvas with sendAndWait operation selected', () => {
+		nodeCreatorFeature.getters.canvasAddButton().click();
+		WorkflowPage.actions.addNodeToCanvas('Manual', false);
+		nodeCreatorFeature.actions.openNodeCreator();
+		cy.contains('Human in the loop').click();
+		nodeCreatorFeature.getters.getCreatorItem('Slack').click();
+		cy.contains('Send and Wait for Response').should('exist');
+	});
 });

packages/editor-ui/src/components/Node/NodeCreator/ItemTypes/NodeItem.vue

@@ -6,6 +6,7 @@ import {
 	CREDENTIAL_ONLY_NODE_PREFIX,
 	DEFAULT_SUBCATEGORY,
 	DRAG_EVENT_DATA_KEY,
+	HITL_SUBCATEGORY,
 } from '@/constants';
 
 import { isCommunityPackageName } from '@/utils/nodeTypesUtils';
@@ -44,6 +45,9 @@ const draggablePosition = ref({ x: -100, y: -100 });
 const draggableDataTransfer = ref(null as Element | null);
 
 const description = computed<string>(() => {
+	if (isSendAndWaitCategory.value) {
+		return '';
+	}
 	if (
 		props.subcategory === DEFAULT_SUBCATEGORY &&
 		!props.nodeType.name.startsWith(CREDENTIAL_ONLY_NODE_PREFIX)
@@ -56,7 +60,8 @@ const description = computed<string>(() => {
 		fallback: props.nodeType.description,
 	});
 });
-const showActionArrow = computed(() => hasActions.value);
+const showActionArrow = computed(() => hasActions.value && !isSendAndWaitCategory.value);
+const isSendAndWaitCategory = computed(() => activeViewStack.subcategory === HITL_SUBCATEGORY);
 const dataTestId = computed(() =>
 	hasActions.value ? 'node-creator-action-item' : 'node-creator-node-item',
 );

packages/editor-ui/src/components/Node/NodeCreator/Modes/NodesMode.vue

@@ -1,7 +1,12 @@
 <script setup lang="ts">
 import { camelCase } from 'lodash-es';
 import { computed } from 'vue';
-import type { INodeCreateElement, NodeCreateElement, NodeFilterType } from '@/Interface';
+import type {
+	ActionTypeDescription,
+	INodeCreateElement,
+	NodeCreateElement,
+	NodeFilterType,
+} from '@/Interface';
 import {
 	TRIGGER_NODE_CREATOR_VIEW,
 	HTTP_REQUEST_NODE_TYPE,
@@ -9,6 +14,7 @@ import {
 	REGULAR_NODE_CREATOR_VIEW,
 	AI_NODE_CREATOR_VIEW,
 	AI_OTHERS_NODE_CREATOR_VIEW,
+	HITL_SUBCATEGORY,
 } from '@/constants';
 
 import type { BaseTextKey } from '@/plugins/i18n';
@@ -26,7 +32,7 @@ import { useI18n } from '@/composables/useI18n';
 import { getNodeIcon, getNodeIconColor, getNodeIconUrl } from '@/utils/nodeTypesUtils';
 import { useUIStore } from '@/stores/ui.store';
 import { useActions } from '../composables/useActions';
-import type { INodeParameters } from 'n8n-workflow';
+import { SEND_AND_WAIT_OPERATION, type INodeParameters } from 'n8n-workflow';
 
 export interface Props {
 	rootView: 'trigger' | 'action';
@@ -51,12 +57,19 @@ const globalSearchItemsDiff = computed(() => useViewStacks().globalSearchItemsDi
 
 function getFilteredActions(node: NodeCreateElement) {
 	const nodeActions = actions?.[node.key] || [];
+	if (activeViewStack.value.subcategory === HITL_SUBCATEGORY) {
+		return getHumanInTheLoopActions(nodeActions);
+	}
 	if (activeViewStack.value.actionsFilter) {
 		return activeViewStack.value.actionsFilter(nodeActions);
 	}
 	return nodeActions;
 }
 
+function getHumanInTheLoopActions(nodeActions: ActionTypeDescription[]) {
+	return nodeActions.filter((action) => action.actionKey === SEND_AND_WAIT_OPERATION);
+}
+
 function selectNodeType(nodeTypes: string[]) {
 	emit('nodeTypeSelected', nodeTypes);
 }

packages/editor-ui/src/components/Node/NodeCreator/NodesListPanel.test.ts

@@ -136,7 +136,7 @@ describe('NodesListPanel', () => {
 
 			await nextTick();
 			expect(screen.getByText('What happens next?')).toBeInTheDocument();
-			expect(screen.queryAllByTestId('item-iterator-item')).toHaveLength(5);
+			expect(screen.queryAllByTestId('item-iterator-item')).toHaveLength(6);
 
 			screen.getByText('Action in an app').click();
 			await nextTick();

packages/editor-ui/src/components/Node/NodeCreator/utils.ts

@@ -13,6 +13,7 @@ import {
 	AI_TRANSFORM_NODE_TYPE,
 	CORE_NODES_CATEGORY,
 	DEFAULT_SUBCATEGORY,
+	HUMAN_IN_THE_LOOP_CATEGORY,
 } from '@/constants';
 import { v4 as uuidv4 } from 'uuid';
 
@@ -23,6 +24,7 @@ import { sortBy } from 'lodash-es';
 import * as changeCase from 'change-case';
 
 import { useSettingsStore } from '@/stores/settings.store';
+import { SEND_AND_WAIT_OPERATION } from 'n8n-workflow';
 
 export function transformNodeType(
 	node: SimplifiedNodeType,
@@ -46,7 +48,11 @@ export function transformNodeType(
 }
 
 export function subcategorizeItems(items: SimplifiedNodeType[]) {
-	const WHITE_LISTED_SUBCATEGORIES = [CORE_NODES_CATEGORY, AI_SUBCATEGORY];
+	const WHITE_LISTED_SUBCATEGORIES = [
+		CORE_NODES_CATEGORY,
+		AI_SUBCATEGORY,
+		HUMAN_IN_THE_LOOP_CATEGORY,
+	];
 	return items.reduce((acc: SubcategorizedNodeTypes, item) => {
 		// Only some subcategories are allowed
 		let subcategories: string[] = [DEFAULT_SUBCATEGORY];
@@ -174,13 +180,21 @@ export function groupItemsInSections(
 
 		return 0;
 	});
-	if (result.length <= 1) {
+	if (!shouldRenderSectionSubtitle(result)) {
 		return items;
 	}
 
 	return result;
 }
 
+const shouldRenderSectionSubtitle = (sections: SectionCreateElement[]) => {
+	if (!sections.length) return false;
+	if (sections.length > 1) return true;
+	if (sections[0].key === SEND_AND_WAIT_OPERATION) return true;
+
+	return false;
+};
+
 export const formatTriggerActionName = (actionPropertyName: string) => {
 	let name = actionPropertyName;
 	if (actionPropertyName.includes('.')) {

packages/editor-ui/src/components/Node/NodeCreator/viewsData.ts

@@ -49,12 +49,14 @@ import {
 	SPLIT_IN_BATCHES_NODE_TYPE,
 	HTTP_REQUEST_NODE_TYPE,
 	HELPERS_SUBCATEGORY,
+	HITL_SUBCATEGORY,
 	RSS_READ_NODE_TYPE,
 	EMAIL_SEND_NODE_TYPE,
 	EDIT_IMAGE_NODE_TYPE,
 	COMPRESSION_NODE_TYPE,
 	AI_CODE_TOOL_LANGCHAIN_NODE_TYPE,
 	AI_WORKFLOW_TOOL_LANGCHAIN_NODE_TYPE,
+	HUMAN_IN_THE_LOOP_CATEGORY,
 } from '@/constants';
 import { useI18n } from '@/composables/useI18n';
 import { useNodeTypesStore } from '@/stores/nodeTypes.store';
@@ -442,6 +444,12 @@ export function RegularView(nodes: SimplifiedNodeType[]) {
 		AI_TRANSFORM_NODE_TYPE,
 	];
 
+	const getSendAndWaitNodes = (nodes: SimplifiedNodeType[]) => {
+		return (nodes ?? [])
+			.filter((node) => node.codex?.categories?.includes(HUMAN_IN_THE_LOOP_CATEGORY))
+			.map((node) => node.name);
+	};
+
 	const view: NodeView = {
 		value: REGULAR_NODE_CREATOR_VIEW,
 		title: i18n.baseText('nodeCreator.triggerHelperPanel.whatHappensNext'),
@@ -532,22 +540,39 @@ export function RegularView(nodes: SimplifiedNodeType[]) {
 					],
 				},
 			},
+			// To add node to this subcategory:
+			// - add "HITL" to the "categories" property of the node's codex
+			// - add "HITL": ["Human in the Loop"] to the "subcategories" property of the node's codex
+			// node has to have the "sendAndWait" operation, if a new operation needs to be included here:
+			// - update getHumanInTheLoopActions in packages/editor-ui/src/components/Node/NodeCreator/Modes/NodesMode.vue
+			{
+				type: 'subcategory',
+				key: HITL_SUBCATEGORY,
+				category: HUMAN_IN_THE_LOOP_CATEGORY,
+				properties: {
+					title: HITL_SUBCATEGORY,
+					icon: 'user-check',
+					sections: [
+						{
+							key: 'sendAndWait',
+							title: i18n.baseText('nodeCreator.sectionNames.sendAndWait'),
+							items: getSendAndWaitNodes(nodes),
+						},
+					],
+				},
+			},
 		],
 	};
 
 	const hasAINodes = (nodes ?? []).some((node) => node.codex?.categories?.includes(AI_SUBCATEGORY));
 	if (hasAINodes)
-		view.items.push({
+		view.items.unshift({
 			key: AI_NODE_CREATOR_VIEW,
 			type: 'view',
 			properties: {
 				title: i18n.baseText('nodeCreator.aiPanel.langchainAiNodes'),
 				icon: 'robot',
 				description: i18n.baseText('nodeCreator.aiPanel.nodesForAi'),
-				tag: {
-					type: 'success',
-					text: i18n.baseText('nodeCreator.aiPanel.newTag'),
-				},
 				borderless: true,
 			},
 		} as NodeViewItem);

packages/editor-ui/src/constants.ts

@@ -262,6 +262,7 @@ export const NODE_CREATOR_OPEN_SOURCES: Record<
 	'': '',
 };
 export const CORE_NODES_CATEGORY = 'Core Nodes';
+export const HUMAN_IN_THE_LOOP_CATEGORY = 'HITL';
 export const CUSTOM_NODES_CATEGORY = 'Custom Nodes';
 export const DEFAULT_SUBCATEGORY = '*';
 export const AI_OTHERS_NODE_CREATOR_VIEW = 'AI Other';
@@ -274,6 +275,7 @@ export const FILES_SUBCATEGORY = 'Files';
 export const FLOWS_CONTROL_SUBCATEGORY = 'Flow';
 export const AI_SUBCATEGORY = 'AI';
 export const HELPERS_SUBCATEGORY = 'Helpers';
+export const HITL_SUBCATEGORY = 'Human in the Loop';
 export const AI_CATEGORY_AGENTS = 'Agents';
 export const AI_CATEGORY_CHAINS = 'Chains';
 export const AI_CATEGORY_LANGUAGE_MODELS = 'Language Models';

packages/editor-ui/src/plugins/i18n/locales/en.json

@@ -1115,6 +1115,7 @@
 	"nodeCreator.subcategoryDescriptions.tools": "Utility components providing various functionalities.",
 	"nodeCreator.subcategoryDescriptions.vectorStores": "Handles storage and retrieval of vector representations.",
 	"nodeCreator.subcategoryDescriptions.miscellaneous": "Other AI related nodes.",
+	"nodeCreator.subcategoryDescriptions.humanInTheLoop": "Wait for approval or human input before continuing",
 	"nodeCreator.subcategoryInfos.languageModels": "Chat models are designed for interactive conversations and follow instructions well, while text completion models focus on generating continuations of a given text input",
 	"nodeCreator.subcategoryInfos.memory": "Memory allows an AI model to remember and reference past interactions with it",
 	"nodeCreator.subcategoryInfos.vectorStores": "Vector stores allow an AI model to reference relevant pieces of documents, useful for question answering and document search",
@@ -1137,8 +1138,10 @@
 	"nodeCreator.subcategoryNames.tools": "Tools",
 	"nodeCreator.subcategoryNames.vectorStores": "Vector Stores",
 	"nodeCreator.subcategoryNames.miscellaneous": "Miscellaneous",
+	"nodeCreator.subcategoryNames.humanInTheLoop": "Human in the loop",
 	"nodeCreator.sectionNames.popular": "Popular",
 	"nodeCreator.sectionNames.other": "Other",
+	"nodeCreator.sectionNames.sendAndWait": "Send and wait for response",
 	"nodeCreator.sectionNames.transform.combine": "Combine items",
 	"nodeCreator.sectionNames.transform.addOrRemove": "Add or remove items",
 	"nodeCreator.sectionNames.transform.convert": "Convert data",

packages/editor-ui/src/plugins/icons/index.ts

@@ -82,6 +82,7 @@ import {
 	faHandScissors,
 	faHandPointLeft,
 	faHandshake,
+	faUserCheck,
 	faHashtag,
 	faHdd,
 	faHistory,
@@ -258,6 +259,7 @@ export const FontAwesomePlugin: Plugin = {
 		addIcon(faHandshake);
 		addIcon(faHandPointLeft);
 		addIcon(faHashtag);
+		addIcon(faUserCheck);
 		addIcon(faHdd);
 		addIcon(faHistory);
 		addIcon(faHome);

packages/nodes-base/nodes/EmailSend/EmailSend.node.json

@@ -2,7 +2,10 @@
 	"node": "n8n-nodes-base.emailSend",
 	"nodeVersion": "1.0",
 	"codexVersion": "1.0",
-	"categories": ["Communication", "Core Nodes"],
+	"categories": ["Communication", "HITL", "Core Nodes"],
+	"subcategories": {
+		"HITL": ["Human in the Loop"]
+	},
 	"resources": {
 		"credentialDocumentation": [
 			{

packages/nodes-base/nodes/Google/Chat/GoogleChat.node.json

@@ -2,9 +2,9 @@
 	"node": "n8n-nodes-base.googleChat",
 	"nodeVersion": "1.0",
 	"codexVersion": "1.0",
-	"categories": ["Communication", "HILT"],
+	"categories": ["Communication", "HITL"],
 	"subcategories": {
-		"HILT": ["Human in the Loop"]
+		"HITL": ["Human in the Loop"]
 	},
 	"resources": {
 		"credentialDocumentation": [

packages/nodes-base/nodes/Google/Gmail/Gmail.node.json

@@ -2,7 +2,10 @@
 	"node": "n8n-nodes-base.gmail",
 	"nodeVersion": "1.0",
 	"codexVersion": "1.0",
-	"categories": ["Communication"],
+	"categories": ["Communication", "HITL"],
+	"subcategories": {
+		"HITL": ["Human in the Loop"]
+	},
 	"resources": {
 		"credentialDocumentation": [
 			{

packages/nodes-base/nodes/Microsoft/Outlook/MicrosoftOutlook.node.json

@@ -2,7 +2,10 @@
 	"node": "n8n-nodes-base.microsoftOutlook",
 	"nodeVersion": "1.0",
 	"codexVersion": "1.0",
-	"categories": ["Communication"],
+	"categories": ["Communication", "HITL"],
+	"subcategories": {
+		"HITL": ["Human in the Loop"]
+	},
 	"resources": {
 		"credentialDocumentation": [
 			{

packages/nodes-base/nodes/Slack/Slack.node.json

@@ -2,7 +2,10 @@
 	"node": "n8n-nodes-base.slack",
 	"nodeVersion": "1.0",
 	"codexVersion": "1.0",
-	"categories": ["Communication"],
+	"categories": ["Communication", "HITL"],
+	"subcategories": {
+		"HITL": ["Human in the Loop"]
+	},
 	"alias": ["human", "form", "wait"],
 	"resources": {
 		"credentialDocumentation": [

packages/nodes-base/nodes/Telegram/Telegram.node.json

@@ -2,7 +2,10 @@
 	"node": "n8n-nodes-base.telegram",
 	"nodeVersion": "1.0",
 	"codexVersion": "1.0",
-	"categories": ["Communication"],
+	"categories": ["Communication", "HITL"],
+	"subcategories": {
+		"HITL": ["Human in the Loop"]
+	},
 	"resources": {
 		"credentialDocumentation": [
 			{