Settings router.

Here's a simple settings router. the createOrUpdate method lives
in the model, and by default all models will return true on save
or false if save went wrong.

lib/Router/Settings.php

@@ -1,5 +1,6 @@
 <?php
 namespace MailPoet\Router;
+use \MailPoet\Models\Setting;
 
 if(!defined('ABSPATH')) exit;
 
@@ -7,12 +8,17 @@ class Settings {
   function __construct() {
   }
 
-  function get($params) {
-    $data = array(
-      'first_name' => 'John',
-      'last_name' => 'Mailer',
-      'email' => 'john@mailpoet.com'
-    );
-    wp_send_json($params);
+  function get() {
+    $settings = Setting::find_array();
+    wp_send_json($settings);
+  }
+
+  function set($args) {
+    $save = function($setting) {
+      Setting::createOrUpdate($setting);
+    };
+    $results = array_map($save, $args);
+
+    wp_send_json(in_array(false, $results));
   }
 }