<?php

/**
 * GetResponsePHP is a PHP5 implementation of the GetResponse API
 * @internal This wrapper is incomplete and subject to change.
 * @authors Ben Tadiar <ben@bentadiar.co.uk>, Robert Staddon <robert@abundantdesigns.com>
 * @copyright Copyright (c) 2010 Assembly Studios
 * @link http://www.assemblystudios.co.uk
 * @package GetResponsePHP
 * @version 0.1.1
 */

/**
 * GetResponse Class
 * @package GetResponsePHP
 */
class GetResponse
{	
	/**
	 * GetResponse API key
	 * http://www.getresponse.com/my_api_key.html
	 * @var string
	 */
	public $apiKey = 'PASS_API_KEY_WHEN_INSTANTIATING_CLASS';
	
	/**
	 * GetResponse API URL
	 * @var string
	 * @access private
	 */
	private $apiURL = 'http://api2.getresponse.com';
	
	/**
	 * Text comparison operators used to filter results
	 * @var array
	 * @access private
	 */
	private $textOperators = array('EQUALS', 'NOT_EQUALS', 'CONTAINS', 'NOT_CONTAINS', 'MATCHES');
	
	/**
	* True to enable printing, false otherwise. Set using the constructor
	* @var boolean
	* @access private
	*/
	private $errorsOn = true;

	/**
	 * Check cURL extension is loaded and that an API key has been passed, also enables or disables error printing
	 * @param string $apiKey GetResponse API key
	 * @param boolean $print_errors
	 * @return void
	 */
	public function __construct($apiKey = null, $print_errors = true)
	{
		if(!extension_loaded('curl')) trigger_error('GetResponsePHP requires PHP cURL', E_USER_ERROR);
		if(is_null($apiKey)) trigger_error('API key must be supplied', E_USER_ERROR);
		$this->apiKey = $apiKey;
		$this->errorsOn = ($print_errors) ? true : false;
	}

	/**
	 * Test connection to the API, returns "pong" on success
	 * @return string
	 */
	public function ping()
	{
		$request  = $this->prepRequest('ping');
		$response = $this->execute($request);
		if(!empty($response) && !empty($response->ping))
		    return $response->ping;
		else
		    return $response;
	}
	
	/**
	 * Get basic user account information
	 * @return object
	 */
	public function getAccountInfo()
	{
		$request  = $this->prepRequest('get_account_info');
		$response = $this->execute($request);
		return $response;
	}

	/**
	 * Get list of email addresses assigned to account
	 * @return object
	 */
	public function getAccountFromFields()
	{
		$request  = $this->prepRequest('get_account_from_fields');
		$response = $this->execute($request);
		return $response;
	}

	/**
	 * Get single email address assigned to an account using the account From Field ID
	 * @param string $id
	 * @return object
	 */
	public function getAccountFromFieldByID($id)
	{
		$request  = $this->prepRequest('get_account_from_field', array('account_from_field' => $id));
		$response = $this->execute($request);
		return $response;
	}
	
	/**
	 * Get single email address assigned to an account using an email address
	 * @param string $email
	 * @return object
	 */
	public function getAccountFromFieldsByEmail($email)
	{
		$request  = $this->prepRequest('get_account_from_fields');
		$response = $this->execute($request);
		foreach($response as $key => $account) if($account->email!=$email) unset($response->$key);
		return $response;
	}
	
	/**
	 * Get a list of active campaigns, optionally filtered
	 * @param string $operator Comparison operator
	 * @param string $comparison Text/expression to compare against
	 * @return object 
	 */
	public function getCampaigns($operator = 'CONTAINS', $comparison = '%')
	{
		$params = null;
		if(in_array($operator, $this->textOperators)) $params = array('name' => array($operator => $comparison));
		$request  = $this->prepRequest('get_campaigns', $params);
		$response = $this->execute($request);
		return $response;
	}
	
	/**
	 * Return a campaign by ID
	 * @param string $id Campaign ID
	 * @return object
	 */
	public function getCampaignByID($id)
	{
		$request  = $this->prepRequest('get_campaign', array('campaign' => $id));
		$response = $this->execute($request);
		return $response;
	}
	
	/**
	 * Return a campaign ID by name
	 * @param string $name Campaign Name
	 * @return string Campaign ID
	 */
	public function getCampaignByName($name)
	{
		$request  = $this->prepRequest('get_campaigns', array('name' => array('EQUALS' => $name)));
		$response = $this->execute($request);
		return key($response);
	}

	/**
	 * Return a list of messages, optionally filtered by multiple conditions
	 * @todo Implement all conditions, this is unfinished
	 * @param array|null $campaigns  Optional argument to narrow results by campaign ID
	 * @param string|null $type  Optional argument to narrow results by "newsletter", "autoresponder", or "draft"
	 * @param string $operator
	 * @param string $comparison
	 * @return object
	 */
	public function getMessages($campaigns = null, $type = null, $operator = 'CONTAINS', $comparison = '%')
	{
		$params = null;
		if(is_array($campaigns)) $params['campaigns'] = $campaigns;
		if(is_string($type)) $params['type'] = $type;
		$request  = $this->prepRequest('get_messages', $params);
		$response = $this->execute($request);
		return $response;
	}
	
	/**
	 * Return a message by ID
	 * @param string $id Message ID
	 * @return object
	 */
	public function getMessageByID($id)
	{
		$request  = $this->prepRequest('get_message', array('message' => $id));
		$response = $this->execute($request);
		return $response;
	}

	/**
	 * Return an autoresponder message from a campaign by Cycle Day
	 * @param string $campaign Campaign ID
	 * @param string $cycle_day Cycle Day
	 * @return object
	 */
	public function getMessageByCycleDay($campaign, $cycle_day)
	{
		$params['campaigns'] = array($campaign);
		$params['type'] = "autoresponder";
		$request  = $this->prepRequest('get_messages', $params);
		$response = $this->execute($request);
		foreach($response as $key => $message) if($message->day_of_cycle!=$cycle_day) unset($response->$key);
		return $response;
	}
	
	/**
	 * Return message contents by ID
	 * @param string $id Message ID
	 * @return object
	 */
	public function getMessageContents($id)
	{
		$request  = $this->prepRequest('get_message_contents', array('message' => $id));
		$response = $this->execute($request);
		return $response;
	}

	/**
	 * Return message statistics
	 * @param string $message Message ID
	 * @param string $grouping grouping
	 * @return object|null
	 */
	public function getMessageStats($message, $grouping = "yearly")
	{
		$params['message'] = $message;
		$params['grouping'] = $grouping;
		$request  = $this->prepRequest('get_message_stats', $params);
		$response = $this->execute($request);
		return $response;
	}

	/**
	 * Return autoresponder message contents by Cycle Day
	 * @param string $campaign Campaign ID
	 * @param string $cycle_day Cycle Day
	 * @return object|null
	 */
	public function getMessageContentsByCycleDay($campaign, $cycle_day)
	{
		$params['campaigns'] = array($campaign);
		$params['type'] = "autoresponder";
		$request  = $this->prepRequest('get_messages', $params);
		$response = $this->execute($request);
		foreach($response as $key => $message) if($message->day_of_cycle==$cycle_day) return $this->getMessageContents($key);
		return null;
	}
	
	/**
	 * Add autoresponder to a campaign at a specific day of cycle
	 * @param string $campaign Campaign ID
	 * @param string $subject Subject of message
	 * @param array $contents Allowed keys are "plain" and "html", at least one is mandatory
	 * @param int $cycle_day
	 * @param string $from_field From Field ID obtained through getAccountFromFields()
	 * @param array $flags Enables extra functionality for a message: "clicktrack", "subscription_reminder", "openrate", "google_analytics"
	 * @return object
	 */
	public function addAutoresponder($campaign, $subject, $cycle_day, $html = null, $plain = null, $from_field = null, $flags = null)
	{
		$params = array('campaign' => $campaign, 'subject' => $subject, 'day_of_cycle' => $cycle_day);
		if(is_string($html)) $params['contents']['html'] = $html;
		if(is_string($plain)) $params['contents']['plain'] = $plain;
		if(is_string($from_field)) $params['from_field'] = $from_field;
		if(is_array($flags)) $params['flags'] = $flags;
		$request  = $this->prepRequest('add_autoresponder', $params);
		$response = $this->execute($request);
		return $response;
	}
	
	/**
	 * Delete an autoresponder
	 * @param string $id
	 * @return object
	 */
	public function deleteAutoresponder($id)
	{
		$request  = $this->prepRequest('delete_autoresponder', array('message' => $id));
		$response = $this->execute($request);
		return $response;
	}
	
	/**
	 * Return a list of contacts, optionally filtered by multiple conditions
	 * @todo Implement all conditions, this is unfinished
	 * @param array|null $campaigns Optional argument to narrow results by campaign ID
	 * @param string $operator Optional argument to change operator (default is 'CONTAINS')
	 *		See https://github.com/GetResponse/DevZone/tree/master/API#operators for additional operator options
	 * @param string $comparison
	 * @param array $fields (an associative array, the keys of which should enable/disable comparing name or email)
	 * @return object
	 */
	public function getContacts($campaigns = null, $operator = 'CONTAINS', $comparison = '%', $fields = array('name' => true, 'email' => false))
	{
		$params = null;
		if(is_array($campaigns)) $params['campaigns'] = $campaigns;
		if($fields['name']) $params['name'] = $this->prepTextOp($operator, $comparison);
		if($fields['email']) $params['email'] = $this->prepTextOp($operator, $comparison);
		$request  = $this->prepRequest('get_contacts', $params);
		$response = $this->execute($request);
		return $response;
	}

	/**
	 * Return a list of contacts by email address (optionally narrowed by campaign)
	 * @param string $email Email Address of Contact (or a string contained in the email address)
	 * @param array|null $campaigns Optional argument to narrow results by campaign ID 
	 * @param string $operator Optional argument to change operator (default is 'CONTAINS')
	 *		See https://github.com/GetResponse/DevZone/tree/master/API#operators for additional operator options
	 * @return object 
	 */
	public function getContactsByEmail($email, $campaigns = null, $operator = 'CONTAINS')
	{
		$params = null;
		$params['email'] = $this->prepTextOp($operator, $email);
		if(is_array($campaigns)) $params['campaigns'] = $campaigns;
		$request  = $this->prepRequest('get_contacts', $params);
		$response = $this->execute($request);
		return $response;
	}
	
	/**
	 * Return a list of contacts filtered by custom contact information
	 * $customs is an associative arrays, the keys of which should correspond to the
	 * custom field names of the customers you wish to retrieve.
	 * @param array|null $campaigns Optional argument to narrow results by campaign ID 
	 * @param string $operator
	 * @param array $customs
	 * @param string $comparison
	 * @return object
	 */
	public function getContactsByCustoms($campaigns = null, $customs, $operator = 'EQUALS')
	{
		$params = null;
		if(is_array($campaigns)) $params['campaigns'] = $campaigns;
		if(!is_array($customs)) trigger_error('Second argument must be an array', E_USER_ERROR);
		foreach($customs as $key => $val) $params['customs'][] = array('name' => $key, 'content' => $this->prepTextOp($operator, $val));
		$request  = $this->prepRequest('get_contacts', $params);
		$response = $this->execute($request);
		return $response;
	}
	
	/**
	 * Return a contact by ID
	 * @param string $id User ID
	 * @return object
	 */
	public function getContactByID($id)
	{
		$request  = $this->prepRequest('get_contact', array('contact' => $id));
		$response = $this->execute($request);
		return $response;
	}

	
	/**
	 * Set a contact name
	 * @param string $id User ID
	 * @return object
	 */
	public function setContactName($id, $name)
	{
		$request  = $this->prepRequest('set_contact_name', array('contact' => $id, 'name' => $name));
		$response = $this->execute($request);
		return $response;
	}
	
	/**
	 * Set a contact cycle
	 * @param string $id User ID
	 * @param int $cycle_day Cycle Day
	 * @return object
	 */
	public function setContactCycle($id, $cycle_day)
	{
		$request  = $this->prepRequest('set_contact_cycle', array('contact' => $id, 'cycle_day' => $cycle_day));
		$response = $this->execute($request);
		return $response;
	}
	
	/**
	 * Set a contact campaign
	 * @param string $id User ID
	 * @param string $campaign Campaign ID
	 * @return object
	 */
	public function setContactCampaign($id, $campaign)
	{
		$request  = $this->prepRequest('move_contact', array('contact' => $id, 'campaign' => $campaign));
		$response = $this->execute($request);
		return $response;
	}
	
	/**
	 * Return a contacts custom information
	 * @param string $id User ID
	 * @return object
	 */
	public function getContactCustoms($id)
	{
		$request  = $this->prepRequest('get_contact_customs', array('contact' => $id));
		$response = $this->execute($request);
		return $response;
	}
	

	/**
	 * Set custom contact information
	 * $customs is an associative array, the keys of which should correspond to the
	 * custom field name you wish to add/modify/remove.
	 * Actions: added if not present, updated if present, removed if value is null
	 * @todo Implement multivalue customs.
	 * @param string $id User ID
	 * @param array $customs
	 * @return object
	 */
	public function setContactCustoms($id, $customs)
	{
		if(!is_array($customs)) trigger_error('Second argument must be an array', E_USER_ERROR);
		foreach($customs as $key => $val) $params[] = array('name' => $key, 'content' => $val);
		$request  = $this->prepRequest('set_contact_customs', array('contact' => $id, 'customs' => $params));
		$response = $this->execute($request);
		return $response;
	}
	
	/**
	 * Return a contacts GeoIP
	 * @param string $id User ID
	 * @return object
	 */
	public function getContactGeoIP($id)
	{
		$request  = $this->prepRequest('get_contact_geoip', array('contact' => $id));
		$response = $this->execute($request);
		return $response;
	}
	
	/**
	 * List dates when the messages were opened by contacts
	 * @param string $id User ID
	 * @return object
	 */
	public function getContactOpens($id)
	{
		$request  = $this->prepRequest('get_contact_opens', array('contact' => $id));
		$response = $this->execute($request);
		return $response;
	}
	
	/**
	 * List dates when the links in messages were clicked by contacts
	 * @param string $id User ID
	 * @return object
	 */
	public function getContactClicks($id)
	{
		$request  = $this->prepRequest('get_contact_clicks', array('contact' => $id));
		$response = $this->execute($request);
		return $response;
	}
	
	/**
	 * Add contact to the specified list (Requires email verification by contact)
	 * The return value of this function will be "queued", and on subsequent
	 * submission of the same email address will be "duplicated".
	 * @param string $campaign Campaign ID
	 * @param string $name Name of contact
	 * @param string $email Email address of contact
	 * @param string $action Standard, insert or update
	 * @param int $cycle_day
	 * @param array $customs
	 * @return object
	 */
	public function addContact($campaign, $name = '', $email, $action = 'standard', $cycle_day = 0, $customs = array())
	{
		$params = array('campaign' => $campaign, 'action' => $action, 'email' => $email, 'cycle_day' => $cycle_day);
	
		if(!empty($name))
			$params['name'] = $name;
			
		if($this->isValidIp($_SERVER['REMOTE_ADDR'])){
			echo '<h2>';
			echo $_SERVER['REMOTE_ADDR'];
			echo '</h2>';
			array_push($params, $_SERVER['REMOTE_ADDR']);
		}
		if(!empty($customs)) {
			foreach($customs as $key => $val) $c[] = array('name' => $key, 'content' => $val);
			$params['customs'] = $c;
		}
		$request  = $this->prepRequest('add_contact', $params);
		$response = $this->execute($request);
		return $response;
	}
	
	/**
	 * Delete a contact
	 * @param string $id
	 * @return object
	 */
	public function deleteContact($id)
	{
		$request  = $this->prepRequest('delete_contact', array('contact' => $id));
		$response = $this->execute($request);
		return $response;
	}
	
	/**
	 * Get blacklist masks on account level
	 * Account is determined by API key
	 * @return object
	 */
	public function getAccountBlacklist()
	{
		$request  = $this->prepRequest('get_account_blacklist');
		$response = $this->execute($request);
		return $response;
	}
	
	/**
	 * Adds blacklist mask on account level
	 * @param string $mask
	 * @return object
	 */
	public function addAccountBlacklist($mask)
	{
		$request  = $this->prepRequest('add_account_blacklist', array('mask' => $mask));
		$response = $this->execute($request);
		return $response;
	}
	
	/**
	 * Delete blacklist mask on account level
	 * @param string $mask
	 * @return object
	 */
	public function deleteAccountBlacklist($mask)
	{
		$request  = $this->prepRequest('delete_account_blacklist', array('mask' => $mask));
		$response = $this->execute($request);
		return $response;
	}

	/**
	* Returns true if the supplied ip is valid, false otherwise.
	* @param string $ip
	* @access private
	*/
	private function isValidIp($ip){

		if(filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)){
			if(substr_count($ip, '.') == 4){
				return true;
			}
		}else if(filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)){
				if(substr_count($ip, ':') == 7){
					return true;
				}
		}
		return false;
	}
	
	/**
	 * Return a key => value array for text comparison
	 * @param string $operator
	 * @param mixed $comparison
	 * @return array
	 * @access private
	 */
	private function prepTextOp($operator, $comparison)
	{
		if(!in_array($operator, $this->textOperators)) trigger_error('Invalid text operator', E_USER_ERROR);
		if($operator === 'CONTAINS') $comparison = '%'.$comparison.'%';
		return array($operator => $comparison);
	}
	
	/**
	 * Return array as a JSON encoded string
	 * @param string $method API method to call
	 * @param array  $params Array of parameters
	 * @return string JSON encoded string
	 * @access private
	 */
	private function prepRequest($method, $params = null, $id = null)
	{
		$array = array($this->apiKey);
		if(!is_null($params)) $array[1] = $params;
		$request = json_encode(array('method' => $method, 'params' => $array, 'id' => $id));
		return $request;
	}
	
	/**
	 * Executes an API call
	 * @param string $request JSON encoded array
	 * @return object
	 * @access private
	 */
	private function execute($request)
	{
		$handle = curl_init($this->apiURL);
		curl_setopt($handle, CURLOPT_POST, 1);
		curl_setopt($handle, CURLOPT_POSTFIELDS, $request);
		curl_setopt($handle, CURLOPT_HEADER, 'Content-type: application/json');
		curl_setopt($handle, CURLOPT_RETURNTRANSFER, true);	  			   
		$response = json_decode(curl_exec($handle));
		if(curl_error($handle)) trigger_error(curl_error($handle), E_USER_ERROR);
		$httpCode = curl_getinfo($handle, CURLINFO_HTTP_CODE);
		if(!(($httpCode == '200') || ($httpCode == '204'))) trigger_error('API call failed. Server returned status code '.$httpCode, E_USER_ERROR);
		curl_close($handle);
		if(!$response->error) return $response->result;
		else if($this->errorsOn){
			var_dump($request);
			return $response->error;
		}
	}
}

?>