fix(Microsoft Outlook Node): Fix binary attachment upload (#4766)

fix(Microsoft Outlook Node): fix binary attachment upload in file-system mode

packages/nodes-base/nodes/Microsoft/Outlook/GenericFunctions.ts

@@ -1,8 +1,19 @@
 import { OptionsWithUri } from 'request';
 
-import { IExecuteFunctions, IExecuteSingleFunctions, ILoadOptionsFunctions } from 'n8n-core';
+import {
+	BINARY_ENCODING,
+	IExecuteFunctions,
+	IExecuteSingleFunctions,
+	ILoadOptionsFunctions,
+} from 'n8n-core';
 
-import { IDataObject, INodeExecutionData, NodeApiError } from 'n8n-workflow';
+import {
+	IBinaryKeyData,
+	IDataObject,
+	INodeExecutionData,
+	NodeApiError,
+	NodeOperationError,
+} from 'n8n-workflow';
 
 export async function microsoftApiRequest(
 	this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions,
@@ -221,3 +232,39 @@ export async function downloadAttachments(
 	}
 	return elements;
 }
+
+export async function binaryToAttachments(
+	this: IExecuteFunctions,
+	attachments: IDataObject[],
+	items: INodeExecutionData[],
+	i: number,
+) {
+	return Promise.all(
+		attachments.map(async (attachment) => {
+			const { binary } = items[i];
+
+			if (binary === undefined) {
+				throw new NodeOperationError(this.getNode(), 'No binary data exists on item!', {
+					itemIndex: i,
+				});
+			}
+
+			const binaryPropertyName = attachment.binaryPropertyName as string;
+			if (binary[binaryPropertyName] === undefined) {
+				throw new NodeOperationError(
+					this.getNode(),
+					`No binary data property "${binaryPropertyName}" does not exists on item!`,
+					{ itemIndex: i },
+				);
+			}
+
+			const binaryData = (binary as IBinaryKeyData)[binaryPropertyName];
+			const dataBuffer = await this.helpers.getBinaryDataBuffer(i, binaryPropertyName);
+			return {
+				'@odata.type': '#microsoft.graph.fileAttachment',
+				name: binaryData.fileName,
+				contentBytes: dataBuffer.toString(BINARY_ENCODING),
+			};
+		}),
+	);
+}