✨ Add Phantombuster Node (#1274)

* ✨ Phantombuster Node

* ⚡ Small improvements

* ⚡ Small fix

* ⚡ Improvements to Phantombuster Node

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

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

@@ -0,0 +1,56 @@
+import {
+	OptionsWithUri,
+} from 'request';
+
+import {
+	IExecuteFunctions,
+	IExecuteSingleFunctions,
+	ILoadOptionsFunctions,
+} from 'n8n-core';
+
+import {
+	IDataObject,
+} from 'n8n-workflow';
+
+export async function phantombusterApiRequest(this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions, method: string, path: string, body: any = {}, qs: IDataObject = {}, option = {}): Promise<any> { // tslint:disable-line:no-any
+
+	const credentials = this.getCredentials('phantombusterApi') as IDataObject;
+
+	const options: OptionsWithUri = {
+		headers: {
+			'X-Phantombuster-Key': credentials.apiKey,
+		},
+		method,
+		body,
+		qs,
+		uri: `https://api.phantombuster.com/api/v2${path}`,
+		json: true,
+	};
+	try {
+		if (Object.keys(body).length === 0) {
+			delete options.body;
+		}
+		//@ts-ignore
+		return await this.helpers.request.call(this, options);
+	} catch (error) {
+		if (error.response && error.response.body && error.response.body.error) {
+
+			const message = error.response.body.error;
+			// Try to return the error prettier
+			throw new Error(
+				`Phantombuster error response [${error.statusCode}]: ${message}`,
+			);
+		}
+		throw error;
+	}
+}
+
+export function validateJSON(json: string | undefined, name: string): any { // tslint:disable-line:no-any
+	let result;
+	try {
+		result = JSON.parse(json!);
+	} catch (exception) {
+		throw new Error(`${name} must provide a valid JSON`);
+	}
+	return result;
+}