✨ Add APITemplate.io node (#1497)

* Add support for APITemplate.io

* ⚡ Refactor node

* 👕 Fix lint issues

* ⚡ Improvements

* ⚡ Fix ApiTemplateIo Node

* ⚡ Add placeholder

Co-authored-by: Jacky Tan Boon Kiat <bktan@apitemplate.io>
Co-authored-by: ricardo <ricardoespinoza105@gmail.com>
Co-authored-by: Jan Oberhauser <jan.oberhauser@gmail.com>

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

@@ -0,0 +1,91 @@
+import {
+	OptionsWithUri,
+} from 'request';
+
+import {
+	IExecuteFunctions,
+	ILoadOptionsFunctions,
+} from 'n8n-core';
+
+export async function apiTemplateIoApiRequest(
+	this: IExecuteFunctions | ILoadOptionsFunctions,
+	method: string,
+	endpoint: string,
+	qs = {},
+	body = {},
+) {
+	const { apiKey } = this.getCredentials('apiTemplateIoApi') as { apiKey: string };
+
+	const options: OptionsWithUri = {
+		headers: {
+			'user-agent': 'n8n',
+			Accept: 'application/json',
+			'X-API-KEY': `${apiKey}`,
+		},
+		uri: `https://api.apitemplate.io/v1${endpoint}`,
+		method,
+		qs,
+		body,
+		followRedirect: true,
+		followAllRedirects: true,
+		json: true,
+	};
+
+	if (!Object.keys(body).length) {
+		delete options.body;
+	}
+
+	if (!Object.keys(qs).length) {
+		delete options.qs;
+	}
+
+	try {
+		const response = await this.helpers.request!(options);
+		if (response.status === 'error') {
+			throw new Error(response.message);
+		}
+		return response;
+	} catch (error) {
+		if (error?.response?.body?.message) {
+			throw new Error(`APITemplate.io error response [${error.statusCode}]: ${error.response.body.message}`);
+		}
+		throw error;
+	}
+}
+
+export async function loadResource(
+	this: ILoadOptionsFunctions,
+	resource: 'image' | 'pdf',
+) {
+	const target = resource === 'image' ? ['JPEG', 'PNG'] : ['PDF'];
+	const templates = await apiTemplateIoApiRequest.call(this, 'GET', '/list-templates');
+	const filtered = templates.filter(({ format }: { format: 'PDF' | 'JPEG' | 'PNG' }) => target.includes(format));
+
+	return filtered.map(({ format, name, id }: { format: string, name: string, id: string }) => ({
+		name: `${name} (${format})`,
+		value: id,
+	}));
+}
+
+export function validateJSON(json: string | object | undefined): any { // tslint:disable-line:no-any
+	let result;
+	if (typeof json === 'object') {
+		return json;
+	}
+	try {
+		result = JSON.parse(json!);
+	} catch (exception) {
+		result = undefined;
+	}
+	return result;
+}
+
+
+export function downloadImage(this: IExecuteFunctions, url: string) {
+	return this.helpers.request({
+		uri: url,
+		method: 'GET',
+		json: false,
+		encoding: null,
+	});
+}