move requests to backend (#18)

source/includes/Api.php

@@ -0,0 +1,53 @@
+<?php
+namespace MobilizonConnector;
+
+class Api {
+  public static function init() {
+    add_action('rest_api_init', 'MobilizonConnector\Api::init_api');
+  }
+
+  public static function init_api() {
+    register_rest_route(
+      NAME . '/v1',
+      '/events',
+      [
+        'methods' => 'GET',
+        'callback' => 'MobilizonConnector\Api::get_events',
+        'args' => [
+          'eventsCount' => [
+            'required' => true,
+            'validate_callback' => function($param, $request, $key) {
+              return is_numeric($param) && $param > 0;
+            }
+          ],
+          'groupName' => [
+            'validate_callback' => function($param, $request, $key) {
+              return !is_numeric($param);
+            }
+          ]
+        ],
+        'permission_callback' => '__return_true',
+      ]
+      );
+  }
+
+  public static function get_events($request) {
+    $eventsCount = $request['eventsCount'];
+    $groupName = isset($request['groupName']) ? $request['groupName'] : '';
+
+    $url = Settings::getUrl();
+
+    try {
+      if ($groupName) {
+        $events = GraphQlClient::get_upcoming_events_by_group_name($url, (int) $eventsCount, $groupName);
+      } else {
+        $events = GraphQlClient::get_upcoming_events($url, (int) $eventsCount);
+      }
+      return $events;
+    } catch (GeneralException $e) {
+      return new \WP_Error('events_not_loading', 'The events could not be loaded!', array('status' => 500));
+    } catch (GroupNotFoundException $e) {
+      return new \WP_Error('group_not_found', sprintf('The group "%s" could not be found!', $groupName), array('status' => 404));
+    }
+  }
+}