routes.php

<?php

/*
|--------------------------------------------------------------------------
| Application Routes
|--------------------------------------------------------------------------
|
| Here is where you can register all of the routes for an application.
| It's a breeze. Simply tell Laravel the URIs it should respond to
| and give it the controller to call when that URI is requested.
|
*/

use App\User;
use App\UserMeta;


$app->get('/', function() use ( $app ) {

	
	$blog_header = './wordpress/wp-blog-header.php';

	$mc_api_key = MC_API_KEY;

	$request = Request::instance();
	$request->setTrustedProxies(array('127.0.0.1')); // only trust proxy headers coming from the IP addresses on the array (change this to suit your needs)
	$ip = $request->getClientIp();

	$fields = Request::all();

	if ( !Request::has('euid') ) {

		$user_meta = UserMeta::where(array( 'meta_key' => 'ip', 'meta_value' => $ip ) )->first();

		if( is_null( $user_meta ) )
			return "unsubscribed user"; # ----------

		return 'no euid requested, but IP whitelisted in db.'; # +++++++

	}else{

		$chimp = new Mailchimp( $mc_api_key );
		$info = $chimp->lists->memberInfo( MC_LIST_ID, array(array('euid'=>$fields['euid']) ) );

		if( $info['error_count'] > 0 )
			return 'the supplied euid is not on the beta list.'; # ------

		if($info['data'][0]['status'] != 'subscribed' )
			return 'this user has unsubscribed from our list'; # -------



		$user = User::firstOrCreate(['euid' => $fields['euid']]);

		$user_meta = UserMeta::where(array( 'user_id' => $user->id, 'meta_key' => 'ip', 'meta_value' => $ip ) )->first();
		
		if( is_null( $user_meta ) ) {
			$user_meta = new UserMeta;

			$user_meta->user_id = $user->id;
			$user_meta->meta_key = 'ip';
			$user_meta->meta_value = $ip;

			$user_meta->save();

			return 'euid validated and IP address whitelisted.'; # ++++++++
		}


		return 'All done!'; # +++++++
	}

});