✨ Add Lemlist node (#1506)

* 🎉 Register node and credentials

* ⚡ Add credentials file

* 🎨 Add SVG icon

* ⚡ Add generic functions file

* ⚡ Add preliminary node stub

* ⚡ Add resource description stubs

* ⚡ Extract get CSV from getAll

* ⚡ Implement lead:create

* ⚡ Implement all lead operations

* ⚡ Implement unsubscribe:create and delete

* ⚡ Preload campaigns

* 🔥 Remove logging

* 🔥 Remove operation per feedback

* 🎨 Prettify error message

* ⚡ Implement unsubscribe:getAll

* ⚡ Add trigger and small improvements

* ⚡ Minor improvement and fixes

Co-authored-by: ricardo <ricardoespinoza105@gmail.com>
Co-authored-by: Jan Oberhauser <jan.oberhauser@gmail.com>

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

@@ -0,0 +1,93 @@
+import {
+	IExecuteFunctions,
+	IHookFunctions,
+} from 'n8n-core';
+
+import {
+	IDataObject,
+	ILoadOptionsFunctions,
+} from 'n8n-workflow';
+
+import {
+	OptionsWithUri,
+} from 'request';
+
+/**
+ * Make an authenticated API request to Lemlist.
+ */
+export async function lemlistApiRequest(
+	this: IHookFunctions | IExecuteFunctions | ILoadOptionsFunctions,
+	method: string,
+	endpoint: string,
+	body: IDataObject = {},
+	qs: IDataObject = {},
+	option: IDataObject = {},
+) {
+
+	const { apiKey } = this.getCredentials('lemlistApi') as {
+		apiKey: string,
+	};
+
+	const encodedApiKey = Buffer.from(':' + apiKey).toString('base64');
+
+	const options: OptionsWithUri = {
+		headers: {
+			'user-agent': 'n8n',
+			'Authorization': `Basic ${encodedApiKey}`,
+		},
+		method,
+		uri: `https://api.lemlist.com/api${endpoint}`,
+		qs,
+		body,
+		json: true,
+	};
+
+	if (!Object.keys(body).length) {
+		delete options.body;
+	}
+
+	if (!Object.keys(qs).length) {
+		delete options.qs;
+	}
+
+	if (Object.keys(option)) {
+		Object.assign(options, option);
+	}
+
+	try {
+		return await this.helpers.request!(options);
+	} catch (error) {
+
+		if (error?.response?.body) {
+			throw new Error(`Lemlist error response [${error.statusCode}]: ${error?.response?.body}`);
+		}
+
+		throw error;
+	}
+}
+
+/**
+ * Make an authenticated API request to Lemlist and return all results.
+ */
+export async function lemlistApiRequestAllItems(
+	this: IExecuteFunctions | ILoadOptionsFunctions | IHookFunctions,
+	method: string,
+	endpoint: string,
+) {
+	const returnData: IDataObject[] = [];
+
+	let responseData;
+	const qs: IDataObject = {};
+
+	qs.limit = 100;
+	qs.offset = 0;
+
+	do {
+		responseData = await lemlistApiRequest.call(this, method, endpoint, {}, qs);
+		returnData.push(...responseData);
+		qs.offset += qs.limit;
+	} while (
+		responseData.length !== 0
+	);
+	return returnData;
+}