Postmark trigger

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

@@ -0,0 +1,47 @@
+import {
+	OptionsWithUri,
+ } from 'request';
+
+import {
+	IExecuteFunctions,
+	ILoadOptionsFunctions,
+} from 'n8n-core';
+
+import {
+	IDataObject,
+	IHookFunctions,
+	IWebhookFunctions
+} from 'n8n-workflow';
+
+
+export async function postmarkApiRequest(this: IExecuteFunctions | IWebhookFunctions | IHookFunctions | ILoadOptionsFunctions, method : string, endpoint : string, body: any = {}, option: IDataObject = {}): Promise<any> { // tslint:disable-line:no-any
+	const credentials = this.getCredentials('postmarkApi');
+
+	if (credentials === undefined) {
+		throw new Error('No credentials got returned!');
+	}
+
+	let options: OptionsWithUri = {
+		headers: {
+			'Content-Type': 'application/json',
+			'Accept': 'application/json',
+			'X-Postmark-Server-Token' : credentials.serverToken
+		},
+		method,
+		body,
+		uri: 'https://api.postmarkapp.com' + endpoint,
+		json: true
+	};
+	if (body === {}) {
+		delete options.body;
+	}
+	options = Object.assign({}, options, option);
+
+	try {
+		return await this.helpers.request!(options);
+	} catch (error) {
+		throw new Error(`Postmark: ${error.statusCode} Message: ${error.message}`);
+	}
+}
+
+