feat: Add support for Ollama embeddings API (#8732)

Signed-off-by: Oleg Ivaniv <me@olegivaniv.com>
Co-authored-by: Oleg Ivaniv <me@olegivaniv.com>

packages/@n8n/nodes-langchain/nodes/embeddings/EmbeddingsOllama/EmbeddingsOllama.node.ts

@@ -0,0 +1,61 @@
+/* eslint-disable n8n-nodes-base/node-dirname-against-convention */
+import {
+	NodeConnectionType,
+	type IExecuteFunctions,
+	type INodeType,
+	type INodeTypeDescription,
+	type SupplyData,
+} from 'n8n-workflow';
+import { OllamaEmbeddings } from 'langchain/embeddings/ollama';
+import { logWrapper } from '../../../utils/logWrapper';
+import { getConnectionHintNoticeField } from '../../../utils/sharedFields';
+import { ollamaDescription, ollamaModel } from '../../llms/LMOllama/description';
+
+export class EmbeddingsOllama implements INodeType {
+	description: INodeTypeDescription = {
+		displayName: 'Embeddings Ollama',
+		name: 'embeddingsOllama',
+		icon: 'file:ollama.svg',
+		group: ['transform'],
+		version: 1,
+		description: 'Use Ollama Embeddings',
+		defaults: {
+			name: 'Embeddings Ollama',
+		},
+		...ollamaDescription,
+		codex: {
+			categories: ['AI'],
+			subcategories: {
+				AI: ['Embeddings'],
+			},
+			resources: {
+				primaryDocumentation: [
+					{
+						url: 'https://docs.n8n.io/integrations/builtin/cluster-nodes/sub-nodes/n8n-nodes-langchain.embeddingsollama/',
+					},
+				],
+			},
+		},
+		// eslint-disable-next-line n8n-nodes-base/node-class-description-inputs-wrong-regular-node
+		inputs: [],
+		// eslint-disable-next-line n8n-nodes-base/node-class-description-outputs-wrong
+		outputs: [NodeConnectionType.AiEmbedding],
+		outputNames: ['Embeddings'],
+		properties: [getConnectionHintNoticeField([NodeConnectionType.AiVectorStore]), ollamaModel],
+	};
+
+	async supplyData(this: IExecuteFunctions, itemIndex: number): Promise<SupplyData> {
+		this.logger.verbose('Supply data for embeddings Ollama');
+		const modelName = this.getNodeParameter('model', itemIndex) as string;
+		const credentials = await this.getCredentials('ollamaApi');
+
+		const embeddings = new OllamaEmbeddings({
+			baseUrl: credentials.baseUrl as string,
+			model: modelName,
+		});
+
+		return {
+			response: logWrapper(embeddings, this),
+		};
+	}
+}