<?php
/*
 FusionPBX
 Version: MPL 1.1

 The contents of this file are subject to the Mozilla Public License Version
 1.1 (the "License"); you may not use this file except in compliance with
 the License. You may obtain a copy of the License at
 http://www.mozilla.org/MPL/

 Software distributed under the License is distributed on an "AS IS" basis,
 WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 for the specific language governing rights and limitations under the
 License.

 The Original Code is FusionPBX

 The Initial Developer of the Original Code is
 Mark J Crane <markjcrane@fusionpbx.com>
 Portions created by the Initial Developer are Copyright (C) 2008-2023
 the Initial Developer. All Rights Reserved.

 Contributor(s):
 Mark J Crane <markjcrane@fusionpbx.com>
*/

	class registrations {

		/**
		 * declare private variables
		 */
		private $app_name;
		private $app_uuid;
		private $permission_prefix;
		private $list_page;
		public $show;
		private $domain_name;

		/**
		 * Set in the constructor. Must be a database object and cannot be null.
		 * @var database Database Object
		 */
		private $database;

		/**
		 * Set in the constructor. Must be an event_socket object and cannot be null.
		 * @var event_socket Event Socket Connection Object
		 */
		private $event_socket;

		/**
		 * called when the object is created
		 */
		public function __construct($setting_array = []) {

			//open a database connection
			if (empty($setting_array['database'])) {
				$this->database = database::new();
			}
			else {
				$this->database = $setting_array['database'];
			}

			//trap passing a PDO object instead of the required database object
			if (!($this->database instanceof database)) {
				//should never happen but will trap it here just in case
				throw new \InvalidArgumentException("Database object passed in the constructor is not a valid database object");
			}

			if (!empty($setting_array['event_socket'])) {
				$this->event_socket = $setting_array['event_socket'];
			}
			else {
				$this->event_socket = event_socket::create();
			}

			//trap passing an invalid connection object for communicating to the switch
			if (!($this->event_socket instanceof event_socket)) {
				//should never happen but will trap it here just in case
				throw new \InvalidArgumentException('Event socket object passed in the constructor is not a valid event_socket object');
			}

			//assign private variables
			$this->app_name = 'registrations';
			$this->app_uuid = '5d9e7cd7-629e-3553-4cf5-f26e39fefa39';
			$this->permission_prefix = 'registration_';
			$this->list_page = 'registrations.php';
			$this->show = 'local';

			//get the domain_name
			if (empty($setting_array['domain_name'])) {
				$this->domain_name = $_SESSION['domain_name'];
			}
			else {
				$this->domain_name = $setting_array['domain_name'];
			}

		}

		/**
		 * get the registrations
		 */
		public function get($profile = 'all') {

			//initialize the id used in the registrations array
				$id = 0;

			//create the event socket connection
				$event_socket = $this->event_socket;

			//make sure the event socket is connected
				if (!$event_socket->is_connected()) {
					//connect to event socket
					$event_socket->connect();

					//check again and throw an error if it can't connect
						if (!$event_socket->is_connected()) {
							message::add($text['error-event-socket'], 'negative', 5000);
							return null;
						}
				}


			//get the default settings
				$sql = "select sip_profile_name from v_sip_profiles ";
				$sql .= "where sip_profile_enabled = 'true' ";
				if (!empty($profile) && $profile != 'all') {
					$sql .= "and sip_profile_name = :sip_profile_name ";
					$parameters['sip_profile_name'] = $profile;
				}
				$sql .= "and sip_profile_enabled = 'true' ";
				$sip_profiles = $this->database->select($sql, $parameters ?? null, 'all');

				if (!empty($sip_profiles)) {

					//use a while loop to ensure the event socket stays connected while communicating
					$count = count($sip_profiles);
					$i = 0;
					while ($event_socket->is_connected() && $i < $count) {
						$field = $sip_profiles[$i++];

						//get sofia status profile information including registrations
							$cmd = "api sofia xmlstatus profile '".$field['sip_profile_name']."' reg";
							$xml_response = trim($event_socket->request($cmd));

						//show an error message
							if ($xml_response == "Invalid Profile!") {
								//add multi-lingual support
								$language = new text;
								$text = $language->get(null, '/app/registrations');

								//show the error message
								$xml_response = "<error_msg>".escape($text['label-message'])."</error_msg>";
							}

						//sanitize the XML
							if (function_exists('iconv')) { $xml_response = iconv("utf-8", "utf-8//IGNORE", $xml_response); }
							$xml_response = preg_replace('/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]/u', '', $xml_response);
							$xml_response = str_replace("<profile-info>", "<profile_info>", $xml_response);
							$xml_response = str_replace("</profile-info>", "</profile_info>", $xml_response);
							$xml_response = str_replace("&lt;", "", $xml_response);
							$xml_response = str_replace("&gt;", "", $xml_response);
							if (strlen($xml_response) > 101) {
								try {
									$xml = new SimpleXMLElement($xml_response);
								}
								catch(Exception $e) {
									echo basename(__FILE__)."<br />\n";
									echo "line: ".__line__."<br />\n";
									echo "error: ".$e->getMessage()."<br />\n";
									//echo $xml_response;
									exit;
								}
								$array = json_decode(json_encode($xml), true);
							}

						//normalize the array
							if (!empty($array) && is_array($array) && (!isset($array['registrations']['registration'][0]) || !is_array($array['registrations']['registration'][0]))) {
								$row = $array['registrations']['registration'];
								unset($array['registrations']['registration']);
								$array['registrations']['registration'][0] = $row;
							}

						//set the registrations array
							if (!empty($array) && is_array($array)) {
								foreach ($array['registrations']['registration'] as $row) {

									//build the registrations array
										//$registrations[0] = $row;
										$user_array = explode('@', $row['user'] ?? '');
										$registrations[$id]['user'] = $row['user'] ?? '';
										$registrations[$id]['call-id'] = $row['call-id'] ?? '';
										$registrations[$id]['contact'] = $row['contact'] ?? '';
										$registrations[$id]['sip-auth-user'] = $row['sip-auth-user'] ?? '';
										$registrations[$id]['agent'] = $row['agent'] ?? '';
										$registrations[$id]['host'] = $row['host'] ?? '';
										$registrations[$id]['network-ip'] = $row['network-ip'] ?? '';
										$registrations[$id]['network-port'] = $row['network-port'] ?? '';
										$registrations[$id]['sip-auth-user'] = $row['sip-auth-user'] ?? '';
										$registrations[$id]['sip-auth-realm'] = $row['sip-auth-realm'] ?? '';
										$registrations[$id]['mwi-account'] = $row['mwi-account'] ?? '';
										$registrations[$id]['status'] = $row['status'] ?? '';
										$registrations[$id]['ping-time'] = $row['ping-time'] ?? '';
										$registrations[$id]['ping-status'] = $row['ping-status'] ?? '';
										$registrations[$id]['sip_profile_name'] = $field['sip_profile_name'];

									//get network-ip to url or blank
										if (isset($row['network-ip'])) {
											$registrations[$id]['network-ip'] = $row['network-ip'];
										}
										else {
											$registrations[$id]['network-ip'] = '';
										}

									//get the LAN IP address if it exists replace the external ip
										$call_id_array = explode('@', $row['call-id'] ?? '');
										if (isset($call_id_array[1])) {
											$agent = $row['agent'];
											$lan_ip = $call_id_array[1];
											if (!empty($agent) && false !== stripos($agent, 'grandstream')) {
												$lan_ip = str_ireplace(
													array('A','B','C','D','E','F','G','H','I','J'),
													array('0','1','2','3','4','5','6','7','8','9'),
													$lan_ip);
											}
											elseif (!empty($agent) && 1 === preg_match('/\ACL750A/', $agent)) {
												//required for GIGASET Sculpture CL750A puts _ in it's lan ip account
												$lan_ip = preg_replace('/_/', '.', $lan_ip);
											}
											$registrations[$id]['lan-ip'] = $lan_ip;
										}
										else if (preg_match('/real=\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/', $row['contact'] ?? '', $ip_match)) {
											//get ip address for snom phones
											$lan_ip = str_replace('real=', '', $ip_match[0]);
											$registrations[$id]['lan-ip'] = $lan_ip;
										}
										else if (preg_match('/\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/', $row['contact'] ?? '', $ip_match)) {
											$lan_ip = preg_replace('/_/', '.', $ip_match[0]);
											$registrations[$id]['lan-ip'] = $lan_ip;
										}
										else {
											$registrations[$id]['lan-ip'] = '';
										}

									//remove unrelated domains
										if (!permission_exists('registration_all') || $this->show != 'all') {
											if ($registrations[$id]['sip-auth-realm'] == $this->domain_name) {}
											else if ($user_array[1] == $this->domain_name) {}
											else {
												unset($registrations[$id]);
											}
										}

									//increment the array id
										$id++;
								}
								unset($array);
							}

					}
				}

			//return the registrations array
				return $registrations ?? null;
		}

		/**
		 * get the registration count
		 */
		public function count($profile = 'all') {

			//use get the registrations to count
				$registrations = $this->get($profile);

			//set the count
				$count = !empty($registrations) ? @sizeof($registrations) : 0;

			//return the registrations count
				return $count;

		}

		/**
		 * unregister registrations
		 */
		public function unregister($registrations) {
			$this->switch_api('unregister', $registrations);
		}

		/**
		 * provision registrations
		 */
		public function provision($registrations) {
			$this->switch_api('provision', $registrations);
		}

		/**
		 * reboot registrations
		 */
		public function reboot($registrations) {
			$this->switch_api('reboot', $registrations);
		}

		/**
		 * switch api calls
		 */
		private function switch_api($action, $records) {
			if (permission_exists($this->permission_prefix.'domain') || permission_exists($this->permission_prefix.'all') || if_group('superadmin')) {

				//add multi-lingual support
					$language = new text;
					$text = $language->get();

				//validate the token
					$token = new token;
					if (!$token->validate($_SERVER['PHP_SELF'])) {
						message::add($text['message-invalid_token'],'negative');
						header('Location: '.$this->list_page);
						exit;
					}

				//filter out unchecked registrations
					if (is_array($records) && @sizeof($records) != 0) {
						foreach($records as $record) {
							if ($record['checked'] == 'true' && !empty($record['user']) && !empty($record['profile'])) {
								$registrations[] = $record;
							}
						}
					}

				//process checked registrations
					if (is_array($registrations) && @sizeof($registrations) != 0) {

						//retrieve sip profiles list
							$sql = "select sip_profile_name as name from v_sip_profiles ";
							$sip_profiles = $this->database->select($sql, null, 'all');
							unset($sql);

						//create the event socket connection
							$event_socket = $this->event_socket;

						//loop through registrations
							if ($event_socket->is_connected()) {
								//check if registrations exist
								if (is_array($registrations)) {
									foreach ($registrations as $registration) {

										//validate the submitted profile
											if (!empty($registration['profile']) && is_array($sip_profiles) && @sizeof($sip_profiles) != 0) {
												foreach ($sip_profiles as $field) {
													if ($field['name'] == $registration['profile']) {
														$profile = $registration['profile'];
														break;
													}
												}
											}
											else {
												header('Location: '.$this->list_page);
												exit;
											}

										//validate the submitted user
											if (!empty($registration['user'])) {
												$user = preg_replace('#[^a-zA-Z0-9_\-\.\@]#', '', $registration['user']);
											}

										//validate the submitted host
											if (!empty($registration['host'])) {
												$host = preg_replace('#[^a-zA-Z0-9_\-\.]#', '', $registration['host']);
											}

										//lookup vendor by agent
											if (!empty($registration['agent'])) {
												$vendor = device::get_vendor_by_agent($registration['agent']);
											}

										//prepare the api command
											if (!empty($profile) && $user) {
												switch ($action) {
													case 'unregister':
														$command = "sofia profile ".$profile." flush_inbound_reg ".$user." reboot";
														$response_message = $text['message-registrations_unregistered'];
														break;
													case 'provision':
														if ($vendor && $host) {
															$command = "lua app.lua event_notify ".$profile." check_sync ".$user." ".$vendor." ".$host;
															$response_message = $text['message-registrations_provisioned'];
														}
														break;
													case 'reboot':
														if ($vendor && $host) {
															$command = "lua app.lua event_notify ".$profile." reboot ".$user." ".$vendor." ".$host;
															$response_message = $text['message-registrations_rebooted'];
														}
														break;
													default:
														header('Location: '.$this->list_page);
														exit;
												}
											}

										//send the api command
											if (!empty($command) && $event_socket->is_connected()) {
												$response = $event_socket->request('api ' . $command);
												$response_api[$user]['command'] = $command;
												$response_api[$user]['log'] = $response;
											}
									}
								}

								//set message
									if (is_array($response_api)) {
										foreach ($response_api as $registration_user => $response) {
											if (is_array($response['command'])) {
												foreach($response['command'] as $command) {
													$command = trim($command ?? '');
													if ($command !== '-ERR no reply') {
														$message .= "<br>\n<strong>".escape($registration_user)."</strong>: ".escape($response_message);
													}
												}
											}
											else {
												if (!empty($response['command']) && $response['command'] !== '-ERR no reply') {
													$message .= "<br>\n<strong>".escape($registration_user)."</strong>: ".escape($response_message);
												}
											}
										}
										message::add($message, 'positive', '7000');
									}
							}
							else {
								message::add($text['error-event-socket'], 'negative', 5000);
							}

					}

			}
		} //method

	} //class