<?php
/**
 * Implementation of notification service
 *
 * @category   DMS
 * @package    SeedDMS
 * @license    GPL 2
 * @version    @version@
 * @author     Uwe Steinmann <uwe@steinmann.cx>
 * @copyright  Copyright (C) 2016 Uwe Steinmann
 * @version    Release: @package_version@
 */

/**
 * Implementation of notification service
 *
 * @category   DMS
 * @package    SeedDMS
 * @author     Uwe Steinmann <uwe@steinmann.cx>
 * @copyright  Copyright (C) 2016 Uwe Steinmann
 * @version    Release: @package_version@
 */
class SeedDMS_NotificationService {
	/**
	 * List of services for sending notification
	 */
	protected $services;

	/*
	 * List of servives with errors
	 */
	protected $errors;

	/*
	 * Service for logging
	 */
	protected $logger;

	/*
	 * Possible types of receivers
	 */
	const RECV_ANY = 0;
	const RECV_NOTIFICATION = 1;
	const RECV_REVIEWER = 2;
	const RECV_APPROVER = 3;

	public function __construct($logger = null) {
		$this->services = array();
		$this->errors = array();
		$this->logger = $logger;
	}

	public function addService($service, $name='') {
		if(!$name)
			$name = md5(uniqid());
		$this->services[$name] = $service;
		$this->errors[$name] = true;
	}

	public function getServices() {
		return $this->services;
	}

	public function getErrors() {
		return $this->errors;
	}

	public function toIndividual($sender, $recipient, $subject, $message, $params=array(), $recvtype=0) {
		$error = true;
		foreach($this->services as $name => $service) {
			if(!is_callable([$service, 'filter']) || $service->filter($sender, $recipient, $subject, $message, $params, $recvtype)) {
				if(is_object($recipient) && ($dms = $recipient->getDMS()) && !strcasecmp(get_class($recipient), $dms->getClassname('user')) && !$recipient->isDisabled() && $recipient->getEmail()!="") {
					$to = $recipient->getEmail();
				} elseif(is_string($recipient) && trim($recipient) != "") {
					$to = $recipient;
				}
				if(!$service->toIndividual($sender, $recipient, $subject, $message, $params, $recvtype)) {
					$error = false;
					$this->errors[$name] = false;
					$this->logger->log('Notification service: '.$name.'. Sending mail \''.$subject.'\' to user \''.$to.'\' failed.', PEAR_LOG_ERR);
				} else {
					$this->logger->log('Notification service: '.$name.'. Sending mail \''.$subject.'\' to user \''.$to.'\' successful.', PEAR_LOG_INFO);
					$this->errors[$name] = true;
				}
			}
		}
		return $error;
	}

	public function toGroup($sender, $groupRecipient, $subject, $message, $params=array(), $recvtype=0) {
		$error = true;
		foreach($this->services as $name => $service) {
			if(!is_callable([$service, 'filter']) || $service->filter($sender, $groupRecipient, $subject, $message, $params, $recvtype)) {
				if(is_object($groupRecipient) && ($dms = $recipient->getDMS()) && strcasecmp(get_class($groupRecipient), $dms->getClassname('group'))) {
					$to = $groupRecipient->getName();
				}
				if(!$service->toGroup($sender, $groupRecipient, $subject, $message, $params, $recvtype)) {
					$error = false;
					$this->errors[$name] = false;
					$this->logger->log('Notification service: '.$name.'. Sending mail \''.$subject.'\' to group \''.$to.'\' failed.', PEAR_LOG_ERR);
				} else {
					$this->errors[$name] = true;
					$this->logger->log('Notification service: '.$name.'. Sending mail \''.$subject.'\' to group \''.$to.'\' successful.', PEAR_LOG_INFO);
				}
			}
		}
		return $error;
	}

	public function toList($sender, $recipients, $subject, $message, $params=array(), $recvtype=0) {
		$error = true;
		foreach($this->services as $name => $service) {
			if(!is_callable([$service, 'filter']) || $service->filter($sender, $recipients, $subject, $message, $params, $recvtype)) {
				$to = [];
				foreach ($recipients as $recipient) {
					if(is_object($recipient) && ($dms = $recipient->getDMS()) && !strcasecmp(get_class($recipient), $dms->getClassname('user')) && !$recipient->isDisabled() && $recipient->getEmail()!="") {
						$to[] = $recipient->getEmail();
					} elseif(is_string($recipient) && trim($recipient) != "") {
						$to[] = $recipient;
					}
				}
				$to = implode($to, ', ');
				if(!$service->toList($sender, $recipients, $subject, $message, $params, $recvtype)) {
					$error = false;
					$this->errors[$name] = false;
					$this->logger->log('Notification service: '.$name.'. Sending mail \''.$subject.'\' to users \''.$to.'\' failed.', PEAR_LOG_ERR);
				} else {
					$this->errors[$name] = true;
					$this->logger->log('Notification service: '.$name.'. Sending mail \''.$subject.'\' to users \''.$to.'\' successful.', PEAR_LOG_INFO);
				}
			}
		}
		return $error;
	}

}