<?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>
*/

//includes files
	require_once dirname(__DIR__, 2) . "/resources/require.php";
	require_once "resources/check_auth.php";

//check permissions
	if (permission_exists('device_export')) {
		//access granted
	}
	else {
		echo "access denied";
		exit;
	}

//set the current domain and user information
	$domain_name = $_SESSION['domain_name'] ?? '';
	$domain_uuid = $_SESSION['domain_uuid'] ?? '';
	$user_uuid = $_SESSION['user_uuid'] ?? '';
	$user_name = $_SESSION['username'] ?? '';

//create database connection and settings object
	$database = database::new();
	$settings = new settings(['database' => $database, 'domain_uuid' => $domain_uuid, 'user_uuid' => $user_uuid]);

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

//define label
	$label_required = $text['label-required'];

//define the functions
	function array2csv(array &$array) {
		if (count($array) == 0) {
			return null;
		}

		//get all headers as first device may not have all columns
		$headers = [];
		foreach ($array as $device) {
			//get the column headers for this device
			$columns = array_keys($device);
			//check if there are more column headers than previous devices
			if (count($columns) > count($headers)) {
				//use the device with all columns
				$headers = $columns;
			}
		}

		//find and remove the "|2" that denotes a duplicate header
		foreach ($headers as $header) {
			$pos = strpos($header, '|');
			if ($pos !== false) {
				$header = substr($header, 0, $pos);
			}
		}

		ob_start();
		$file_pointer = fopen("php://output", 'w');
		fputcsv($file_pointer, $headers);
		foreach ($array as $row) {
			fputcsv($file_pointer, $row);
		}
		fclose($file_pointer);
		return ob_get_clean();
	}

	function download_send_headers($filename) {
		// disable caching
		$now = gmdate("D, d M Y H:i:s");
		header("Expires: Tue, 03 Jul 2001 06:00:00 GMT");
		header("Cache-Control: max-age=0, no-cache, must-revalidate, proxy-revalidate");
		header("Last-Modified: {$now} GMT");

		// force download
		header("Content-Type: application/force-download");
		header("Content-Type: application/octet-stream");
		header("Content-Type: application/download");

		// disposition / encoding on response body
		header("Content-Disposition: attachment;filename={$filename}");
		header("Content-Transfer-Encoding: binary");
	}

//define possible columns in the array
	$available_columns['devices'][] = 'device_uuid';
	$available_columns['devices'][] = 'device_profile_uuid';
	$available_columns['devices'][] = 'device_address';
	$available_columns['devices'][] = 'device_label';
	$available_columns['devices'][] = 'device_vendor';
	$available_columns['devices'][] = 'device_template';
	$available_columns['devices'][] = 'device_enabled_date';
	$available_columns['devices'][] = 'device_username';
	$available_columns['devices'][] = 'device_password';
	$available_columns['devices'][] = 'device_uuid_alternate';
	$available_columns['devices'][] = 'device_provisioned_date';
	$available_columns['devices'][] = 'device_provisioned_method';
	$available_columns['devices'][] = 'device_provisioned_ip';
	$available_columns['devices'][] = 'device_enabled';
	$available_columns['devices'][] = 'device_description';

	$available_columns['device_lines'][] = 'device_line_uuid';
	$available_columns['device_lines'][] = 'device_uuid';
	$available_columns['device_lines'][] = 'line_number';
	$available_columns['device_lines'][] = 'server_address';
	$available_columns['device_lines'][] = 'server_address_primary';
	$available_columns['device_lines'][] = 'server_address_secondary';
	$available_columns['device_lines'][] = 'outbound_proxy_primary';
	$available_columns['device_lines'][] = 'outbound_proxy_secondary';
	$available_columns['device_lines'][] = 'display_name';
	$available_columns['device_lines'][] = 'user_id';
	$available_columns['device_lines'][] = 'auth_id';
	$available_columns['device_lines'][] = 'password';
	$available_columns['device_lines'][] = 'sip_port';
	$available_columns['device_lines'][] = 'sip_transport';
	$available_columns['device_lines'][] = 'register_expires';
	$available_columns['device_lines'][] = 'shared_line';
	$available_columns['device_lines'][] = 'enabled';

//get the devices and send them as output
	$column_group = $_REQUEST["column_group"] ?? null;
	if (is_array($column_group) && @sizeof($column_group) != 0) {

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

		//validate table names
			foreach($column_group as $table_name => $columns) {
				if (!isset($available_columns[$table_name])) {
					unset($column_group[$table_name]);
				}
			}

		//validate columns
			foreach($column_group as $table_name => $columns) {
				foreach ($columns as $column_name) {
					if (!in_array($column_name, $available_columns[$table_name])) {
						unset($column_group[$table_name][$column_name]);
					}
				}
			}

		//iterate columns
			if (is_array($column_group) && @sizeof($column_group) != 0) {

				//device_uuid must be exported
				$column_group['devices']['device_uuid'] = 'device_uuid';

				$column_names = implode(", ", $column_group['devices']);
				$sql = "select ".$column_names." from v_devices ";
				$sql .= "where domain_uuid = :domain_uuid ";
				$parameters['domain_uuid'] = $domain_uuid;
				$devices = $database->select($sql, $parameters, 'all');
				unset($sql, $parameters, $column_names);

				foreach($column_group as $table_name => $columns) {
					if ($table_name !== 'devices') {
						//device_uuid must be included in child table to match export row
						$columns['device_uuid'] = 'device_uuid';
						$column_names = implode(", ", $columns);
						$sql = "select ".$column_names." from v_".$table_name." ";
						$sql .= " where domain_uuid = :domain_uuid ";
						$parameters['domain_uuid'] = $domain_uuid;
						$child_table_result = $database->select($sql, $parameters, 'all');
						$x = 0;
						foreach($devices as $device) {
							$header_match_count = 1;
							//find the matching device within the linked table
							foreach($child_table_result as $row) {
								if ($device['device_uuid'] == $row['device_uuid']) {
									foreach($row as $key => $value) {
										//check for multi-line devices
										if ($key != 'device_uuid' && array_key_exists($key, $devices[$x])) {
											//create a new key so that we don't overwrite data
											$devices[$x][$key . '|' . $header_match_count] = $value;
										} else {
											$devices[$x][$key] = $value;
										}
									}
									$header_match_count++;
								}
							}
							$x++;
						}
						unset($sql, $parameters, $column_names);
					}
				}

				if (is_array($devices) && @sizeof($devices) != 0) {
					download_send_headers("device_export_".date("Y-m-d").".csv");
					echo array2csv($devices);
					exit;
				}
			}
			unset($column_group);
	}

//create token
	$object = new token;
	$token = $object->create($_SERVER['PHP_SELF']);

//include the header
	$document['title'] = $text['title-device_export'];
	require_once "resources/header.php";

//show the content
	echo "<form method='post' name='frm' id='frm'>\n";

	echo "<div class='action_bar' id='action_bar'>\n";
	echo "	<div class='heading'><b>".$text['header-device_export']."</b></div>\n";
	echo "	<div class='actions'>\n";
	echo button::create(['type'=>'button','label'=>$text['button-back'],'icon'=>$_SESSION['theme']['button_icon_back'],'id'=>'btn_back','link'=>'devices.php']);
	echo button::create(['type'=>'submit','label'=>$text['button-export'],'icon'=>$_SESSION['theme']['button_icon_export'],'id'=>'btn_save','style'=>'margin-left: 15px;']);
	echo "	</div>\n";
	echo "	<div style='clear: both;'></div>\n";
	echo "</div>\n";

	echo $text['description-device_export'];
	echo "<br /><br />\n";

	if (is_array($available_columns) && @sizeof($available_columns) != 0) {
		$x = 0;
		foreach ($available_columns as $table_name => $columns) {
			$table_name_label = ucwords(str_replace(['-','_',],' ', $table_name));
			echo "<div class='category'>\n";
			echo "<b>".$table_name_label."</b>\n";
			echo "<br>\n";
			echo "<table class='list'>\n";
			echo "<tr class='list-header'>\n";
			echo "	<th class='checkbox'>\n";
			echo "		<input type='checkbox' id='checkbox_all_".$table_name."' name='checkbox_all' onclick=\"list_all_toggle('".$table_name."');\" ".(empty($available_columns) ? "style='visibility: hidden;'" : null).">\n";
			echo "	</th>\n";
			echo "	<th>".$text['label-column_name']."</th>\n";
			echo "</tr>\n";
			foreach ($columns as $column_name) {
				$list_row_onclick = "if (!this.checked) { document.getElementById('checkbox_all').checked = false; }";
				echo "<tr class='list-row' href='".($list_row_url ?? '')."'>\n";
				echo "	<td class='checkbox'>\n";
				//device_uuid must be selected on devices to avoid duplication on import
				if ($table_name == 'devices' && $column_name == 'device_uuid') {
					echo "		<input type='checkbox' title='$label_required' class='disabled_checkbox_devices' name='column_group[$table_name][$column_name]' id='checkbox_$x' value='$column_name' checked='checked' onclick='return false;'>\n";
				} else {
					echo "		<input type='checkbox' class='checkbox_".$table_name."' name='column_group[".$table_name."][".$column_name."]' id='checkbox_".$x."' value=\"".$column_name."\" onclick=\"".$list_row_onclick."\">\n";
				}
				echo "	</td>\n";
				if ($table_name == 'devices' && $column_name == 'device_uuid') {
					echo "	<td title='$label_required'>".$column_name."</td>";
				} else {
					echo "	<td onclick=\"document.getElementById('checkbox_".$x."').checked = document.getElementById('checkbox_".$x."').checked ? false : true; ".$list_row_onclick."\">".$column_name."</td>";
				}
				echo "</tr>";
				$x++;
			}
			echo "</table>\n";
			echo "<br>\n";
			echo "</div>\n";
		}
	}

	//test the validation
	//echo "		<input type='hidden' name='column_group[devices][xxx]'  value=\"xxx\">\n";
	//echo "		<input type='hidden' name='column_group[device_lines][yyy]' value=\"yyy\">\n";
	//echo "		<input type='hidden' name='column_group[device_zzz][zzz]' value=\"zzz\">\n";

	echo "<input type='hidden' name='".$token['name']."' value='".$token['hash']."'>\n";
	echo "</form>\n";

//include the footer
	require_once "resources/footer.php";

?>