<?php

/**
 * Textlocal API2 Wrapper Class
 *
 * This class is used to interface with the Textlocal API2 to send messages, manage contacts, retrieve messages from
 * inboxes, track message delivery statuses, access history reports
 *
 * @package    Textlocal
 * @subpackage API
 * @author     Andy Dixon <andy.dixon@tetxlocal.com>
 * @version    1.3-IN
 * @const      REQUEST_URL       URL to make the request to
 * @const      REQUEST_TIMEOUT   Timeout in seconds for the HTTP request
 * @const      REQUEST_HANDLER   Handler to use when making the HTTP request (for future use)
 */
class Textlocal
{
	const REQUEST_URL = 'http://api.textlocal.in/';
	const REQUEST_TIMEOUT = 8;
	const REQUEST_HANDLER = 'curl';

	private $username;
	private $hash;
	private $apiKey;
	private $sender_number;

	private $errorReporting = false;

	public $errors = array();
	public $warnings = array();

	public $lastRequest = array();

	/**
	 * Instantiate the object
	 * @param $username
	 * @param $hash
	 */
	function __construct()
	{
		 
        $ci = & get_instance();
        $apiKey = false;
        if (is_superadmin_loggedin()) {
            $branchID = $ci->input->post('branch_id');
        } else {
            $branchID = get_loggedin_branch_id();
        }
        $textlocal = $ci->db->get_where('sms_credential', array('id' => 5, 'branch_id' => $branchID))->row_array();

		//$username, $hash, $apiKey = false
		$this->username 		= $textlocal['field_one'];
		$this->hash 			= $textlocal['field_three'];
		$this->sender_number 	= $textlocal['field_two'];


		if ($apiKey) {
			$this->apiKey = $apiKey;
		}
	}

	/**
	 * Private function to construct and send the request and handle the response
	 * @param       $command
	 * @param array $params
	 * @return array|mixed
	 * @throws Exception
	 * @todo Add additional request handlers - eg fopen, file_get_contacts
	 */
	private function _sendRequest($command, $params = array())
	{
		if ($this->apiKey && !empty($this->apiKey)) {
			$params['apiKey'] = $this->apiKey;

		} else {
			$params['hash'] = $this->hash;
		}
		// Create request string
		$params['username'] = $this->username;

		$this->lastRequest = $params;

		if (self::REQUEST_HANDLER == 'curl')
			$rawResponse = $this->_sendRequestCurl($command, $params);
		else throw new Exception('Invalid request handler.');

		$result = json_decode($rawResponse);
		if (isset($result->errors)) {
			if (count($result->errors) > 0) {
				foreach ($result->errors as $error) {
					switch ($error->code) {
						default:
							throw new Exception($error->message);
					}
				}
			}
		}

		return $result;
	}

	/**
	 * Curl request handler
	 * @param $command
	 * @param $params
	 * @return mixed
	 * @throws Exception
	 */
	private function _sendRequestCurl($command, $params)
	{

		$url = self::REQUEST_URL . $command . '/';

		// Initialize handle
		$ch = curl_init($url);
		curl_setopt_array($ch, array(
			CURLOPT_POST           => true,
			CURLOPT_POSTFIELDS     => $params,
			CURLOPT_RETURNTRANSFER => true,
			CURLOPT_SSL_VERIFYPEER => false,
			CURLOPT_TIMEOUT        => self::REQUEST_TIMEOUT
		));

		$rawResponse = curl_exec($ch);
		$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
		$error = curl_error($ch);
		curl_close($ch);

		if ($rawResponse === false) {
			throw new Exception('Failed to connect to the Textlocal service: ' . $error);
		} elseif ($httpCode != 200) {
			throw new Exception('Bad response from the Textlocal service: HTTP code ' . $httpCode);
		}

		return $rawResponse;
	}

	/**
	 * fopen() request handler
	 * @param $command
	 * @param $params
	 * @throws Exception
	 */
	private function _sendRequestFopen($command, $params)
	{
		throw new Exception('Unsupported transfer method');
	}

	/**
	 * Get last request's parameters
	 * @return array
	 */
	public function getLastRequest()
	{
		return $this->lastRequest;
	}

	/**
	 * Send an SMS to one or more comma separated numbers
	 * @param       $numbers
	 * @param       $message
	 * @param       $sender
	 * @param null  $sched
	 * @param false $test
	 * @param null  $receiptURL
	 * @param numm  $custom
	 * @param false $optouts
	 * @param false $simpleReplyService
	 * @return array|mixed
	 * @throws Exception
	 */

	public function sendSms($numbers, $message, $sched = null, $test = false, $receiptURL = null, $custom = null, $optouts = false, $simpleReplyService = false)
	{

		if (!is_array($numbers))
			throw new Exception('Invalid $numbers format. Must be an array');
		if (empty($message))
			throw new Exception('Empty message');
		if (empty($this->sender_number))
			throw new Exception('Empty sender name');
		if (!is_null($sched) && !is_numeric($sched))
			throw new Exception('Invalid date format. Use numeric epoch format');

		$params = array(
			'message'       => urlencode($message),
			'numbers'       => implode(',', $numbers),
			'sender'        => urlencode($this->sender_number),
			'schedule_time' => $sched,
			'test'          => $test,
			'receipt_url'   => $receiptURL,
			'custom'        => $custom,
			'optouts'       => $optouts,
			'simple_reply'  => $simpleReplyService
		);

		return $this->_sendRequest('send', $params);
	}


	/**
	 * Send an SMS to a Group of contacts - group IDs can be retrieved from getGroups()
	 * @param       $groupId
	 * @param       $message
	 * @param null  $sender
	 * @param false $test
	 * @param null  $receiptURL
	 * @param numm  $custom
	 * @param false $optouts
	 * @param false $simpleReplyService
	 * @return array|mixed
	 * @throws Exception
	 */
	public function sendSmsGroup($groupId, $message, $sender = null, $sched = null, $test = false, $receiptURL = null, $custom = null, $optouts = false, $simpleReplyService = false)
	{

		if (!is_numeric($groupId))
			throw new Exception('Invalid $groupId format. Must be a numeric group ID');
		if (empty($message))
			throw new Exception('Empty message');
		if (empty($sender))
			throw new Exception('Empty sender name');
		if (!is_null($sched) && !is_numeric($sched))
			throw new Exception('Invalid date format. Use numeric epoch format');

		$params = array(
			'message'       => urlencode($message),
			'group_id'      => $groupId,
			'sender'        => urlencode($sender),
			'schedule_time' => $sched,
			'test'          => $test,
			'receipt_url'   => $receiptURL,
			'custom'        => $custom,
			'optouts'       => $optouts,
			'simple_reply'  => $simpleReplyService
		);

		return $this->_sendRequest('send', $params);
	}


	/**
	 * Send an MMS to a one or more comma separated contacts
	 * @param       $numbers
	 * @param       $fileSource - either an absolute or relative path, or http url to a file.
	 * @param       $message
	 * @param null  $sched
	 * @param false $test
	 * @param false $optouts
	 * @return array|mixed
	 * @throws Exception
	 */
	public function sendMms($numbers, $fileSource, $message, $sched = null, $test = false, $optouts = false)
	{

		if (!is_array($numbers))
			throw new Exception('Invalid $numbers format. Must be an array');
		if (empty($message))
			throw new Exception('Empty message');
		if (empty($fileSource))
			throw new Exception('Empty file source');
		if (!is_null($sched) && !is_numeric($sched))
			throw new Exception('Invalid date format. Use numeric epoch format');

		$params = array(
			'message'       => urlencode($message),
			'numbers'       => implode(',', $numbers),
			'schedule_time' => $sched,
			'test'          => $test,
			'optouts'       => $optouts
		);

		/** Local file. POST to service */
		if (is_readable($fileSource))
			$params['file'] = '@' . $fileSource;
		else $params['url'] = $fileSource;

		return $this->_sendRequest('send_mms', $params);
	}

	/**
	 * Send an MMS to a group - group IDs can be
	 * @param       $groupId
	 * @param       $fileSource
	 * @param       $message
	 * @param null  $sched
	 * @param false $test
	 * @param false $optouts
	 * @return array|mixed
	 * @throws Exception
	 */
	public function sendMmsGroup($groupId, $fileSource, $message, $sched = null, $test = false, $optouts = false)
	{

		if (!is_numeric($groupId))
			throw new Exception('Invalid $groupId format. Must be a numeric group ID');
		if (empty($message))
			throw new Exception('Empty message');
		if (empty($fileSource))
			throw new Exception('Empty file source');
		if (!is_null($sched) && !is_numeric($sched))
			throw new Exception('Invalid date format. Use numeric epoch format');

		$params = array(
			'message'       => urlencode($message),
			'group_id'      => $groupId,
			'schedule_time' => $sched,
			'test'          => $test,
			'optouts'       => $optouts
		);

		/** Local file. POST to service */
		if (is_readable($fileSource))
			$params['file'] = '@' . $fileSource;
		else $params['url'] = $fileSource;

		return $this->_sendRequest('send_mms', $params);
	}

	/**
	 *Returns reseller customer's ID's
	 * @return array
	 **/

	public function getUsers()
	{
		return $this->_sendRequest('get_users');
	}

	/**
	 * Transfer credits to a reseller's customer
	 * @param $user - can be ID or Email
	 * @param $credits
	 * @return array|mixed
	 * @throws Exception
	 **/

	public function transferCredits($user, $credits)
	{

		if (!is_numeric($credits))
			throw new Exception('Invalid credits format');
		if (!is_numeric($user))
			throw new Exception('Invalid user');
		if (empty($user))
			throw new Exception('No user specified');
		if (empty($credits))
			throw new Exception('No credits specified');

		if (is_int($user)) {
			$params = array(
				'user_id' => urlencode($user),
				'credits' => $credits
			);
		} else {
			$params = array(
				'user_email' => urlencode($user),
				'credits'    => $credits
			);
		}

		return $this->_sendRequest('transfer_credits', $params);
	}

	/**Get templates from an account **/

	public function getTemplates()
	{
		return $this->_sendRequest('get_templates');
	}

	/** Check the availability of a keyword
	 * @param $keyword
	 * return array|mixed
	 */
	public function checkKeyword($keyword)
	{

		$params = array('keyword' => $keyword);
		return $this->_sendRequest('check_keyword', $params);
	}

	/**
	 * Create a new contact group
	 * @param $name
	 * @return array|mixed
	 */
	public function createGroup($name)
	{
		$params = array('name' => $name);
		return $this->_sendRequest('create_group', $params);
	}

	/**
	 * Get contacts from a group - Group IDs can be retrieved with the getGroups() function
	 * @param     $groupId
	 * @param     $limit
	 * @param int $startPos
	 * @return array|mixed
	 * @throws Exception
	 */
	public function getContacts($groupId, $limit, $startPos = 0)
	{

		if (!is_numeric($groupId))
			throw new Exception('Invalid $groupId format. Must be a numeric group ID');
		if (!is_numeric($startPos) || $startPos < 0)
			throw new Exception('Invalid $startPos format. Must be a numeric start position, 0 or above');
		if (!is_numeric($limit) || $limit < 1)
			throw new Exception('Invalid $limit format. Must be a numeric limit value, 1 or above');

		$params = array(
			'group_id' => $groupId,
			'start'    => $startPos,
			'limit'    => $limit
		);
		return $this->_sendRequest('get_contacts', $params);
	}

	/**
	 * Create one or more number-only contacts in a specific group, defaults to 'My Contacts'
	 * @param        $numbers
	 * @param string $groupid
	 * @return array|mixed
	 */
	public function createContacts($numbers, $groupid = '5')
	{
		$params = array("group_id" => $groupid);

		if (is_array($numbers)) {
			$params['numbers'] = implode(',', $numbers);
		} else {
			$params['numbers'] = $numbers;
		}

		return $this->_sendRequest('create_contacts', $params);
	}

	/**
	 * Create bulk contacts - with name and custom information from an array of:
	 * [first_name] [last_name] [number] [custom1] [custom2] [custom3]
	 *
	 * @param array  $contacts
	 * @param string $groupid
	 * @return array|mixed
	 */
	function createContactsBulk($contacts, $groupid = '5')
	{
		// JSON & URL-encode array
		$contacts = urlencode(json_encode($contacts));

		$params = array
		("group_id" => $groupid, "contacts" => $contacts);
		return $this->_sendRequest('create_contacts_bulk', $params);
	}

	/**
	 * Get a list of groups and group IDs
	 * @return array|mixed
	 */
	public function getGroups()
	{
		return $this->_sendRequest('get_groups');
	}

	/**
	 * Get the status of a message based on the Message ID - this can be taken from sendSMS or from a history report
	 * @param $messageid
	 * @return array|mixed
	 */
	public function

	tatus($messageid)
	{
		$params = array("message_id" => $messageid);
		return $this->_sendRequest('status_message', $params);
	}

	/**
	 * Get the status of a message based on the Batch ID - this can be taken from sendSMS or from a history report
	 * @param $batchid
	 * @return array|mixed
	 */
	public function getBatchStatus($batchid)
	{
		$params = array("batch_id" => $batchid);
		return $this->_sendRequest('status_batch', $params);
	}

	/**
	 * Get sender names
	 * @return array|mixed
	 */
	public function getSenderNames()
	{
		return $this->_sendRequest('get_sender_names');
	}

	/**
	 * Get inboxes available on the account
	 * @return array|mixed
	 */
	public function getInboxes()
	{
		return $this->_sendRequest('get_inboxes');
	}

	/**
	 * Get Credit Balances
	 * @return array
	 */
	public function getBalance()
	{
		$result = $this->_sendRequest('balance');
		return array('sms' => $result->balance->sms, 'mms' => $result->balance->mms);
	}

	/**
	 * Get messages from an inbox - The ID can ge retrieved from getInboxes()
	 * @param $inbox
	 * @return array|bool|mixed
	 */
	public function getMessages($inbox,$min,$max)
	{
		if (!isset($inbox)) return false;
		$options = array('inbox_id' => $inbox,'min_time'=>$min,'max_time'=>$max);
		return $this->_sendRequest('get_messages', $options);
	}

/*public function getMessages($inbox)
	{
		if (!isset($inbox)) return false;
		$options = array('inbox_id' => $inbox);
		return $this->_sendRequest('get_messages', $options);
	}*/
	/**
	 * Cancel a scheduled message based on a message ID from getScheduledMessages()
	 * @param $id
	 * @return array|bool|mixed
	 */
	public function cancelScheduledMessage($id)
	{
		if (!isset($id)) return false;
		$options = array('sent_id' => $id);
		return $this->_sendRequest('cancel_scheduled', $options);
	}

	/**
	 * Get Scheduled Message information
	 * @return array|mixed
	 */
	public function getScheduledMessages()
	{
		return $this->_sendRequest('get_scheduled');
	}

	/**
	 * Delete a contact based on telephone number from a group
	 * @param     $number
	 * @param int $groupid
	 * @return array|bool|mixed
	 */
	public function deleteContact($number, $groupid = 5)
	{
		if (!isset($number)) return false;
		$options = array('number' => $number, 'group_id' => $groupid);
		return $this->_sendRequest('delete_contact', $options);
	}

	/**
	 * Delete a group - Be careful, we can not recover any data deleted by mistake
	 * @param $groupid
	 * @return array|mixed
	 */
	public function deleteGroup($groupid)
	{
		$options = array('group_id' => $groupid);
		return $this->_sendRequest('delete_group', $options);
	}


	/**
	 * Get single SMS history (single numbers, comma seperated numbers when sending)
	 * @param $start
	 * @param $limit
	 * @param $min_time             Unix timestamp
	 * @param $max_time             Unix timestamp
	 * @return array|bool|mixed
	 */
	public function getSingleMessageHistory($start, $limit, $min_time, $max_time)
	{
		return $this->getHistory('get_history_single', $start, $limit, $min_time, $max_time);
	}

	/**
	 * Get API SMS Message history
	 * @param $start
	 * @param $limit
	 * @param $min_time             Unix timestamp
	 * @param $max_time             Unix timestamp
	 * @return array|bool|mixed
	 */
	public function getAPIMessageHistory($start, $limit, $min_time, $max_time)
	{
		return $this->getHistory('get_history_api', $start, $limit, $min_time, $max_time);
	}

	/**
	 * Get Email to SMS History
	 * @param $start
	 * @param $limit
	 * @param $min_time             Unix timestamp
	 * @param $max_time             Unix timestamp
	 * @return array|bool|mixed
	 */
	public function getEmailToSMSHistory($start, $limit, $min_time, $max_time)
	{
		return $this->getHistory('get_history_email', $start, $limit, $min_time, $max_time);
	}

	/**
	 * Get group SMS history
	 * @param $start
	 * @param $limit
	 * @param $min_time             Unix timestamp
	 * @param $max_time             Unix timestamp
	 * @return array|bool|mixed
	 */
	public function getGroupMessageHistory($start, $limit, $min_time, $max_time)
	{
		return $this->getHistory('get_history_group', $start, $limit, $min_time, $max_time);
	}

	/**
	 * Generic function to provide validation and the request method for getting all types of history
	 * @param $type
	 * @param $start
	 * @param $limit
	 * @param $min_time
	 * @param $max_time
	 * @return array|bool|mixed
	 */
	private function getHistory($type, $start, $limit, $min_time, $max_time)
	{
		if (!isset($start) || !isset($limit) || !isset($min_time) || !isset($max_time)) return false;
		$options = array('start' => $start, 'limit' => $limit, 'min_time' => $min_time, 'max_time' => $max_time);
		return $this->_sendRequest($type, $options);
	}

	/**
	 * Get a list of surveys
	 * @return array|mixed
	 */
	public function getSurveys()
	{
		return $this->_sendRequest('get_surveys');
	}

	/**
	 * Get a deatils of a survey
	 * @return array|mixed
	 */
	public function getSurveyDetails()
	{
		$options = array('survey_id' => $surveyid);
		return $this->_sendRequest('get_survey_details');
	}

	/**
	 * Get a the results of a given survey
	 * @return array|mixed
	 */
	public function getSurveyResults($surveyid, $start, $end)
	{
		$options = array('survey_id' => $surveyid, 'start_date' => $start, 'end_date' => $end);
		return $this->_sendRequest('get_surveys', $options);
	}

	/**
	 * Get all account optouts
	 * @return array|mixed
	 */

	public function getOptouts($time = null)
	{
		return $this->_sendRequest('get_optouts');
	}
}

;

class Contact
{
	var $number;
	var $first_name;
	var $last_name;
	var $custom1;
	var $custom2;
	var $custom3;

	var $groupID;

	/**
	 * Structure of a contact object
	 * @param        $number
	 * @param string $firstname
	 * @param string $lastname
	 * @param string $custom1
	 * @param string $custom2
	 * @param string $custom3
	 */
	function __construct($number, $firstname = '', $lastname = '', $custom1 = '', $custom2 = '', $custom3 = '')
	{
		$this->number = $number;
		$this->first_name = $firstname;
		$this->last_name = $lastname;
		$this->custom1 = $custom1;
		$this->custom2 = $custom2;
		$this->custom3 = $custom3;
	}
}

;

/**
 * If the json_encode function does not exist, then create it..
 */

if (!function_exists('json_encode')) {
	function json_encode($a = false)
	{
		if (is_null($a)) return 'null';
		if ($a === false) return 'false';
		if ($a === true) return 'true';
		if (is_scalar($a)) {
			if (is_float($a)) {
				// Always use "." for floats.
				return floatval(str_replace(",", ".", strval($a)));
			}

			if (is_string($a)) {
				static $jsonReplaces = array(array("\\", "/", "\n", "\t", "\r", "\b", "\f", '"'), array('\\\\', '\\/', '\\n', '\\t', '\\r', '\\b', '\\f', '\"'));
				return '"' . str_replace($jsonReplaces[0], $jsonReplaces[1], $a) . '"';
			} else
				return $a;
		}
		$isList = true;
		for ($i = 0, reset($a); $i < count($a); $i++, next($a)) {
			if (key($a) !== $i) {
				$isList = false;
				break;
			}
		}
		$result = array();
		if ($isList) {
			foreach ($a as $v) $result[] = json_encode($v);
			return '[' . join(',', $result) . ']';
		} else {
			foreach ($a as $k => $v) $result[] = json_encode($k) . ':' . json_encode($v);
			return '{' . join(',', $result) . '}';
		}
	}
}
