✨ Add Workable Trigger Node (#2522)

* ⚡ Workable Trigger

* ⚡ Improvements

* ⚡ Small improvement

* ⚡ Minor improvements

Co-authored-by: Jan Oberhauser <jan.oberhauser@gmail.com>

packages/nodes-base/nodes/Workable/GenericFunctions.ts

@@ -0,0 +1,37 @@
+import {
+	OptionsWithUri,
+} from 'request';
+
+import {
+	IExecuteFunctions,
+	IExecuteSingleFunctions,
+	IHookFunctions,
+	ILoadOptionsFunctions,
+} from 'n8n-core';
+
+import {
+	IDataObject,
+	NodeApiError,
+} from 'n8n-workflow';
+
+export async function workableApiRequest(this: IHookFunctions | IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions, method: string, resource: string, body: any = {}, qs: IDataObject = {}, uri?: string, option: IDataObject = {}): Promise<any> { // tslint:disable-line:no-any
+	const credentials = await this.getCredentials('workableApi') as { accessToken: string, subdomain: string };
+
+	let options: OptionsWithUri = {
+		headers: { 'Authorization': `Bearer ${credentials.accessToken}` },
+		method,
+		qs,
+		body,
+		uri: uri || `https://${credentials.subdomain}.workable.com/spi/v3${resource}`,
+		json: true,
+	};
+	options = Object.assign({}, options, option);
+	if (Object.keys(options.body).length === 0) {
+		delete options.body;
+	}
+	try {
+		return await this.helpers.request!(options);
+	} catch (error) {
+		throw new NodeApiError(this.getNode(), error);
+	}
+}