fix(Discord Node): When using OAuth2 authentication, check if user is a guild member when sending direct message (#9183)

Author: michael-radency

packages/nodes-base/nodes/Discord/v2/actions/channel/deleteChannel.operation.ts

@@ -25,7 +25,7 @@ export const description = updateDisplayOptions(displayOptions, properties);
 
 export async function execute(
 	this: IExecuteFunctions,
-	guildId: string,
+	_guildId: string,
 	userGuilds: IDataObject[],
 ): Promise<INodeExecutionData[]> {
 	const returnData: INodeExecutionData[] = [];

packages/nodes-base/nodes/Discord/v2/actions/channel/get.operation.ts

@@ -25,7 +25,7 @@ export const description = updateDisplayOptions(displayOptions, properties);
 
 export async function execute(
 	this: IExecuteFunctions,
-	guildId: string,
+	_guildId: string,
 	userGuilds: IDataObject[],
 ): Promise<INodeExecutionData[]> {
 	const returnData: INodeExecutionData[] = [];

packages/nodes-base/nodes/Discord/v2/actions/channel/update.operation.ts

@@ -104,7 +104,7 @@ export const description = updateDisplayOptions(displayOptions, properties);
 
 export async function execute(
 	this: IExecuteFunctions,
-	guildId: string,
+	_guildId: string,
 	userGuilds: IDataObject[],
 ): Promise<INodeExecutionData[]> {
 	const returnData: INodeExecutionData[] = [];

packages/nodes-base/nodes/Discord/v2/actions/message/deleteMessage.operation.ts

@@ -25,7 +25,7 @@ export const description = updateDisplayOptions(displayOptions, properties);
 
 export async function execute(
 	this: IExecuteFunctions,
-	guildId: string,
+	_guildId: string,
 	userGuilds: IDataObject[],
 ): Promise<INodeExecutionData[]> {
 	const returnData: INodeExecutionData[] = [];

packages/nodes-base/nodes/Discord/v2/actions/message/get.operation.ts

@@ -41,7 +41,7 @@ export const description = updateDisplayOptions(displayOptions, properties);
 
 export async function execute(
 	this: IExecuteFunctions,
-	guildId: string,
+	_guildId: string,
 	userGuilds: IDataObject[],
 ): Promise<INodeExecutionData[]> {
 	const returnData: INodeExecutionData[] = [];

packages/nodes-base/nodes/Discord/v2/actions/message/getAll.operation.ts

@@ -42,7 +42,7 @@ export const description = updateDisplayOptions(displayOptions, properties);
 
 export async function execute(
 	this: IExecuteFunctions,
-	guildId: string,
+	_guildId: string,
 	userGuilds: IDataObject[],
 ): Promise<INodeExecutionData[]> {
 	const returnData: INodeExecutionData[] = [];

packages/nodes-base/nodes/Discord/v2/actions/message/react.operation.ts

@@ -36,7 +36,7 @@ export const description = updateDisplayOptions(displayOptions, properties);
 
 export async function execute(
 	this: IExecuteFunctions,
-	guildId: string,
+	_guildId: string,
 	userGuilds: IDataObject[],
 ): Promise<INodeExecutionData[]> {
 	const returnData: INodeExecutionData[] = [];

packages/nodes-base/nodes/Discord/v2/actions/message/send.operation.ts

@@ -4,7 +4,7 @@ import type {
 	INodeExecutionData,
 	INodeProperties,
 } from 'n8n-workflow';
-import { NodeOperationError } from 'n8n-workflow';
+import { NodeApiError, NodeOperationError } from 'n8n-workflow';
 import { updateDisplayOptions } from '../../../../../utils/utilities';
 import { discordApiMultiPartRequest, discordApiRequest } from '../../transport';
 import {
@@ -153,7 +153,7 @@ export async function execute(
 		};
 
 		if (embeds) {
-			body.embeds = prepareEmbeds.call(this, embeds, i);
+			body.embeds = prepareEmbeds.call(this, embeds);
 		}
 
 		try {
@@ -166,11 +166,39 @@ export async function execute(
 					extractValue: true,
 				}) as string;
 
+				if (isOAuth2) {
+					try {
+						await discordApiRequest.call(this, 'GET', `/guilds/${guildId}/members/${userId}`);
+					} catch (error) {
+						if (error instanceof NodeApiError && error.httpCode === '404') {
+							throw new NodeOperationError(
+								this.getNode(),
+								`User with the id ${userId} is not a member of the selected guild`,
+								{
+									itemIndex: i,
+								},
+							);
+						}
+
+						throw new NodeOperationError(this.getNode(), error, {
+							itemIndex: i,
+						});
+					}
+				}
+
 				channelId = (
 					(await discordApiRequest.call(this, 'POST', '/users/@me/channels', {
 						recipient_id: userId,
 					})) as IDataObject
 				).id as string;
+
+				if (!channelId) {
+					throw new NodeOperationError(
+						this.getNode(),
+						'Could not create a channel to send direct message to',
+						{ itemIndex: i },
+					);
+				}
 			}
 
 			if (sendTo === 'channel') {
@@ -179,11 +207,13 @@ export async function execute(
 				}) as string;
 			}
 
-			if (!channelId) {
-				throw new NodeOperationError(this.getNode(), 'Channel ID is required');
+			if (isOAuth2 && sendTo !== 'user') {
+				await checkAccessToChannel.call(this, channelId, userGuilds, i);
 			}
 
-			if (isOAuth2) await checkAccessToChannel.call(this, channelId, userGuilds, i);
+			if (!channelId) {
+				throw new NodeOperationError(this.getNode(), 'Channel ID is required', { itemIndex: i });
+			}
 
 			let response: IDataObject[] = [];
 

packages/nodes-base/nodes/Discord/v2/helpers/utils.ts

@@ -114,9 +114,9 @@ export function prepareOptions(options: IDataObject, guildId?: string) {
 	return options;
 }
 
-export function prepareEmbeds(this: IExecuteFunctions, embeds: IDataObject[], i = 0) {
+export function prepareEmbeds(this: IExecuteFunctions, embeds: IDataObject[]) {
 	return embeds
-		.map((embed, index) => {
+		.map((embed) => {
 			let embedReturnData: IDataObject = {};
 
 			if (embed.inputMethod === 'json') {
@@ -261,7 +261,7 @@ export async function checkAccessToChannel(
 	if (!guildId) {
 		throw new NodeOperationError(
 			this.getNode(),
-			`Could not fing server for channel with the id ${channelId}`,
+			`Could not find server for channel with the id ${channelId}`,
 			{
 				itemIndex,
 			},

packages/nodes-base/nodes/Discord/v2/methods/listSearch.ts

@@ -124,7 +124,7 @@ export async function categorySearch(this: ILoadOptionsFunctions): Promise<INode
 
 export async function userSearch(
 	this: ILoadOptionsFunctions,
-	filter?: string,
+	_filter?: string,
 	paginationToken?: string,
 ): Promise<INodeListSearchResult> {
 	const guildId = await getGuildId.call(this);

packages/nodes-base/nodes/Discord/v2/transport/discord.api.ts

@@ -48,7 +48,7 @@ export async function discordApiRequest(
 		if (remaining === 0) {
 			await sleep(resetAfter);
 		} else {
-			await sleep(20); //prevent excing global rate limit of 50 requests per second
+			await sleep(20); //prevent exceeding global rate limit of 50 requests per second
 		}
 
 		return response.body || { success: true };
@@ -91,7 +91,7 @@ export async function discordApiMultiPartRequest(
 		if (remaining === 0) {
 			await sleep(resetAfter);
 		} else {
-			await sleep(20); //prevent excing global rate limit of 50 requests per second
+			await sleep(20); //prevent exceeding global rate limit of 50 requests per second
 		}
 
 		return jsonParse<IDataObject[]>(response.body);