changed sync process from Get to Post call to meet REST specification

api/v3/TwingleSync/Post.php

@@ -0,0 +1,72 @@
+<?php
+
+use CRM_TwingleCampaign_ExtensionUtil as E;
+use CRM\TwingleCampaign\BAO\TwingleApiCall as TwingleApiCall;
+
+include_once E::path() . '/api/v3/TwingleSync/BAO/TwingleApiCall.php';
+
+/**
+ * TwingleSync.Post API specification (optional)
+ * This is used for documentation and validation.
+ *
+ * @param array $spec description of fields supported by this API call
+ *
+ * @see https://docs.civicrm.org/dev/en/latest/framework/api-architecture/
+ */
+function _civicrm_api3_twingle_sync_Post_spec(&$spec) {
+  $spec['twingle_api_key'] = [
+    'name'         => 'twingle_api_key',
+    'title'        => E::ts('Twingle API key'),
+    'type'         => CRM_Utils_Type::T_STRING,
+    'api.required' => 0,
+    'description'  => E::ts('The key to access the Twingle API'),
+  ];
+  $spec['is_test'] = [
+    'name'         => 'is_test',
+    'title'        => E::ts('Test'),
+    'type'         => CRM_Utils_Type::T_BOOLEAN,
+    'api.required' => 0,
+    'description'  => E::ts('If this is set true, no database change will be made'),
+  ];
+}
+
+/**
+ * TwingleSync.Post API
+ *
+ * @param array $params
+ *
+ * @return array
+ *   API result descriptor
+ *
+ * @throws \CiviCRM_API3_Exception|\API_Exception
+ * @see civicrm_api3_create_success
+ *
+ */
+function civicrm_api3_twingle_sync_Post($params) {
+  $result_values = [];
+
+  // Is this call a test?
+  $is_test = (boolean) $params['is_test'];
+
+  // If function call provides an API key, use it instead of the API key set
+  // on the extension settings page
+  $apiKey = empty($params['twingle_api_key'])
+    ? CRM_Core_BAO_Setting::getItem('', 'twingle_api_key')
+    : $params['twingle_api_key'];
+  $twingleApi = new TwingleApiCall($apiKey);
+
+  // Get all projects from Twingle and store them in $projects
+  $projects = $twingleApi->getProject();
+
+  // Create projects as campaigns if they do not exist and store results in
+  // $result_values
+  $i = 0;
+  foreach ($projects as $project) {
+    if (is_array($project)) {
+      $result_values['sync']['projects'][$i++] = $twingleApi
+        ->syncProject($project, $is_test);
+    }
+  }
+
+  return civicrm_api3_create_success($result_values);
+}