OptOutFetcher/Program.cs

using RestSharp;
using System.Text.Json.Nodes;
using System.Text.Json;
using System.Net;
using RestSharp.Authenticators;

/*
	Campaign Monitor API reference: https://www.campaignmonitor.com/api/v3-3/getting-started/
	Dobbs API key/client ID available from Josh in \\KM202401\c$\Users\joshdeck.KEYMTV\Documents\Misc\OptOutFetcher
 */

internal class Program
{
	private static string ListID = "3bb5109cdf3265eac26b3fa34ffae379";

	static void Main(string[] args)
	{
		GetBouncedUsers();
	}



	private static RestClient InitializeAndGetClient()
	{
		var cookieJar = new CookieContainer();
		var options = new RestClientOptions("https://api.createsend.com")
		{
			Authenticator = new HttpBasicAuthenticator("7cb8625ed34fbc298521f66b9e491ec3df53859a892c92d3", "x")
		};
		return new RestClient(options);
	}



	private static JsonNode? GetOptOuts(string fromDate)
	{
		// Just outputs, need to revise possibly? who knows?
		var client = InitializeAndGetClient();
		var request = new RestRequest();
		if (fromDate != "")
			request = new RestRequest("api/v3.3/lists/3bb5109cdf3265eac26b3fa34ffae379/unsubscribed.json?date=" + fromDate);
		else
			request = new RestRequest("api/v3.3/lists/3bb5109cdf3265eac26b3fa34ffae379/unsubscribed.json");

		var response = client.ExecuteGet(request);

		return JsonSerializer.Deserialize<JsonNode>(response.Content!)!;
	}



	// GET ALL BOUNCED PEOPLE AT ONCE; https://www.campaignmonitor.com/api/v3-3/lists/#bounced-subscribers-2
	// Output files are sent to {CurrentWorkingDirectory}\OptOutFetcher\bin\Debug\net8.0\Output
	private static void GetBouncedUsers()
	{
		var client = InitializeAndGetClient();

		// Get total number of bounces so we know how many pages (of 10k entries) to export
		var request = new RestRequest(string.Format("api/v3.3/lists/{0}/stats.json", ListID));
		var response = client.ExecuteGet(request);
		var dict = JsonSerializer.Deserialize<Dictionary<string, dynamic>>(response.Content);
		JsonElement countJson = dict["TotalBounces"];
		var count = -1;
		countJson.TryGetInt32(out count);
        Console.WriteLine(count);

		// Iterate over all bounces and write to file
		var pageCount = count / 1000;
		for (int pagesLeft = 1 + count / 1000; pagesLeft > 0; pagesLeft--)
		{
			var currentPageNumber = pageCount - pagesLeft + 1;
			request = new RestRequest(string.Format("https://api.createsend.com/api/v3.3/lists/{0}/bounced.json?page={1}&pagesize=1000&orderfield=date&orderdirection=asc", ListID, "" + currentPageNumber));
			response = client.ExecuteGet(request);
			//string docPath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
			using (StreamWriter outputFile = new StreamWriter(Path.Combine("Output", string.Format("BouncedUsersPage_{0}", "" + currentPageNumber))))
			{
					outputFile.WriteLine(response.Content);
			}
		}
		
    }
}