AdExchange.php

<?php 

/**
 * Use composers autoload class to load library files
 */
require_once '../vendor/autoload.php';

/**
 * AdExchangeSeller Api class
 * 
 * - Create OAuth Client ID credentials from https://console.cloud.google.com/apis/credentials
 * - Download the client_secrets.json file and us it in the class below when calling initClient.
 * - Go to https://developers.google.com/oauthplayground/ and pick _all_ the API's you wan't to 
 * be able to access.
 * - Click the settings button on the upper right hand side and select *Use your own OAuth credentials*.  
 *   Add the credentials from before (found at https://console.cloud.google.com/apis/credentials) and 		
 *   click Exchange authorization code for tokens.
 * - The given refresh token will never expire, so it can be used until a new one is generated. 
 */
class AdExchange
{
	private $client;
	private $configFile;
	private $authConfigFile;
	private $service;
	private $accountId;
	private $refreshToken;
	private $scope;

	private function getClient()
	{
		return $this->client;
	}

	private function setClient($client)
	{
		$this->client = $client;
	}

	public function initClient($accountId, $refreshToken, $authConfigPath = 'client_secrets.json')
	{
		$this->setAccountId($accountId);
		$this->setRefreshToken($refreshToken);
		$this->setAuthConfigFile($authConfigPath);
		//$this->setScope(Google_Service_AdExchangeSeller::ADEXCHANGE_SELLER_READONLY);
		$this->initClientHelper();

		return true;
	}

	private function initClientHelper()
	{
		$this->setClient(new Google_Client());
		$this->client->setAuthConfig($this->getAuthConfigFile()); // client_secrets.json
		$this->client->addScope(Google_Service_AdExchangeSeller::ADEXCHANGE_SELLER_READONLY);
		// $this->client->setAccessType('offline');
		$this->client->fetchAccessTokenWithRefreshToken($this->getRefreshToken());
		$this->setService(new Google_Service_AdExchangeSeller($this->getClient()));

		return true;
	}

	private function getScope()
	{
		if(isset($this->scope))
		{
			return $this->scope;
		}
		throw new Exception('Scope is not set.');
	}

	private function setScope($scope)
	{
		$this->scope = $scope;
	}

	private function getAuthConfigFile()
	{
		if (isset($this->authConfigFile) && is_file($this->authConfigFile))
		{
			return $this->authConfigFile;
		}
		throw new Exception('Auth config file is not set or is not a file.');
	}

	private function setAuthConfigFile($authConfigFile)
	{
		$this->authConfigFile = $authConfigFile;
	}

	private function getService()
	{
		if(isset($this->service))
		{
			return $this->service;
		}
		throw new Exception('Service is not set');
	}

	private function setService($service)
	{
		$this->service = $service;
	}

	private function getAccountId()
	{
		if(isset($this->accountId))
		{
			return $this->accountId;
		}
		throw new Exception('Account id is not set');
	}
	
	private function setAccountId($accountId)
	{
		$this->accountId = $accountId;
	}

	private function getRefreshToken()
	{
		if(isset($this->refreshToken))
		{
			return $this->refreshToken;
		}
		throw new Exception('Access Token is not set');
	}

	private function setRefreshToken($refreshToken)
	{
		$this->refreshToken = $refreshToken;
	}

	public function getReportData($startDate, $endDate, $dimensions, $metrics)
	{
		try
		{
			$optParams = [
				'metric' => $metrics,
				'dimension' => $dimensions,
				'sort' => '+DATE',
				'alt' => 'media'
			];

			$report = $this->getService()->accounts_reports->generate($this->getAccountId(), $startDate, $endDate, $optParams);

			if (isset($report)) // && isset($report['rows']))
			{
				return $report;
			}
			return $report;
		}
		catch(Exception $e)
		{
			throw new Exception('Could not retrieve report data. ' . $report . $e->getMessage());
		}
	}
}