Reading and Writing Data Using the Campaign Monitor API

Hey there, fellow JavaScript devs! Ready to dive into the world of Campaign Monitor API integration? Let's get our hands dirty with some code and learn how to sync data like pros.

Authentication: Your Key to the Kingdom

First things first, you'll need an API key. Head over to your Campaign Monitor account and grab that key. Now, let's set up authentication:

const axios = require('axios');
const apiKey = 'your-api-key-here';
const client = axios.create({
  baseURL: 'https://api.createsend.com/api/v3.2/',
  auth: {
    username: apiKey,
    password: ''
  }
});

Reading Data: Fetch Those Subscribers!

Time to get some data. Let's fetch subscriber lists and details:

async function getSubscriberLists() {
  try {
    const response = await client.get('clients/{client_id}/lists.json');
    return response.data;
  } catch (error) {
    console.error('Error fetching subscriber lists:', error);
  }
}

async function getSubscriberDetails(listId, email) {
  try {
    const response = await client.get(`lists/${listId}/subscribers/${email}.json`);
    return response.data;
  } catch (error) {
    console.error('Error fetching subscriber details:', error);
  }
}

Writing Data: Add and Update Like a Boss

Now, let's add some subscribers and update their info:

async function addSubscriber(listId, subscriberData) {
  try {
    await client.post(`subscribers/${listId}.json`, subscriberData);
    console.log('Subscriber added successfully');
  } catch (error) {
    console.error('Error adding subscriber:', error);
  }
}

async function updateSubscriber(listId, email, updatedData) {
  try {
    await client.put(`subscribers/${listId}.json?email=${email}`, updatedData);
    console.log('Subscriber updated successfully');
  } catch (error) {
    console.error('Error updating subscriber:', error);
  }
}

Syncing Data: Keep Everything in Harmony

Let's create a sync function that handles rate limits and pagination:

async function syncSubscribers(listId) {
  let page = 1;
  let hasMore = true;

  while (hasMore) {
    try {
      const response = await client.get(`lists/${listId}/active.json?page=${page}&pagesize=1000`);
      const subscribers = response.data.Results;

      // Process subscribers here
      for (const subscriber of subscribers) {
        await processSubscriber(subscriber);
      }

      hasMore = response.data.NumberOfPages > page;
      page++;

      // Respect rate limits
      await new Promise(resolve => setTimeout(resolve, 1000));
    } catch (error) {
      console.error('Error syncing subscribers:', error);
      // Implement retry logic here
    }
  }
}

async function processSubscriber(subscriber) {
  // Implement your sync logic here
  console.log('Processing subscriber:', subscriber.EmailAddress);
}

Webhooks: Real-time Updates, Anyone?

Set up webhooks to get instant updates:

const express = require('express');
const app = express();

app.post('/webhook', express.json(), (req, res) => {
  const { Type, Data } = req.body;
  
  switch (Type) {
    case 'Subscribe':
      handleNewSubscriber(Data);
      break;
    case 'Deactivate':
      handleUnsubscribe(Data);
      break;
    // Handle other event types
  }

  res.sendStatus(200);
});

function handleNewSubscriber(data) {
  console.log('New subscriber:', data.EmailAddress);
  // Implement your logic here
}

function handleUnsubscribe(data) {
  console.log('Unsubscribed:', data.EmailAddress);
  // Implement your logic here
}

app.listen(3000, () => console.log('Webhook server running on port 3000'));

Best Practices: Stay Sharp, Stay Efficient

1. Cache API responses to reduce unnecessary calls.
2. Use bulk operations when possible for better performance.
3. Implement proper error handling and logging.
4. Keep your API key secure and never expose it in client-side code.

And there you have it! You're now equipped to build a robust Campaign Monitor integration. Remember, the key to a great integration is clean code, efficient data handling, and a good error management strategy. Now go forth and sync that data like a champ!

Need more info? Check out the Campaign Monitor API docs for all the nitty-gritty details. Happy coding!