/**
  * Get a set of campaigns
  * @param string $accessToken - Constant Contact OAuth2 access token
  * @param array $params - query params to be appended to the request
  * @return ResultSet
  */
 public function getCampaigns($accessToken, array $params = null)
 {
     $baseUrl = Config::get('endpoints.base_url') . Config::get('endpoints.campaigns');
     $url = $this->buildUrl($baseUrl, $params);
     $response = parent::getRestClient()->get($url, parent::getHeaders($accessToken));
     $body = json_decode($response->body, true);
     $campaigns = array();
     foreach ($body['results'] as $contact) {
         $campaigns[] = Campaign::createSummary($contact);
     }
     return new ResultSet($campaigns, $body['meta']);
 }
 /**
  * Get a set of campaigns
  * @param string $accessToken - Constant Contact OAuth2 access token
  * @param array $params - associative array of query parameters and values to append to the request.
  *      Allowed parameters include:
  *      limit - Specifies the number of results displayed per page of output, from 1 - 500, default = 50.
  *      modified_since - ISO-8601 formatted timestamp.
  *      next - the next link returned from a previous paginated call. May only be used by itself.
  * @return ResultSet
  * @throws CtctException
  */
 public function getCampaigns($accessToken, array $params = array())
 {
     $baseUrl = Config::get('endpoints.base_url') . Config::get('endpoints.campaigns');
     $request = parent::createBaseRequest($accessToken, 'GET', $baseUrl);
     if ($params) {
         $query = $request->getQuery();
         foreach ($params as $name => $value) {
             $query->add($name, $value);
         }
     }
     try {
         $response = parent::getClient()->send($request);
     } catch (ClientException $e) {
         throw parent::convertException($e);
     }
     $body = $response->json();
     $campaigns = array();
     foreach ($body['results'] as $contact) {
         $campaigns[] = Campaign::createSummary($contact);
     }
     return new ResultSet($campaigns, $body['meta']);
 }