<?php
/*
 *  dbQuery.php
 *
 *  This file is part of the VE.Direct web UI
 *  https://git.schauaus.at/VE-Tools/VE.Direct-webui
 *  It is licensed under the GPL3.0 or later.
 *  You should have received a copy of the license with this software
 */

$config = json_decode( file_get_contents('../config.json') );
$dbPath = (str_starts_with($config->database, '/')) ? $config->database : dirname(__FILE__) . '/../' . $config->database;
try {
	$db = new SQLite3($dbPath, SQLITE3_OPEN_READONLY);
}
catch (Exception $e) {
	returnJson(['error'=>'Cannot conect to database! ' . $e->getMessage()], 400);
}
switch ($_REQUEST['q']) {
	case 'deviceData':
		getDeviceData();
		break;
	case 'devices':
		getDevices();
		break;
	case 'metadata':
		getMetaData();
		break;
	default:
		returnJson(['error'=>'No request provided!'], 400);
}

function getDeviceData() {
	if(!isset($_REQUEST['device'])) returnJson(['error'=>'No device provided'], 400);
	$sql = "SELECT date, time, data FROM '" . $_REQUEST['device'] . "' ORDER BY date ASC, time ASC;";
	$data = queryDb($sql);
	if(!$data) returnJson(['error'=>'No data found'], 400);
	returnJson($data);
}

function getDevices () {
	$sql = "SELECT name FROM sqlite_schema WHERE name NOT LIKE 'sqlite_%' AND name <> 'meta' ORDER BY name ASC;";
	$data = queryDb($sql);
	if(!$data) returnJson(['error'=>'No devices found'], 400);
	returnJson($data);
}

function getMetaData() {
	$sql = "SELECT * FROM meta;";
	$data = queryDb($sql);
	if(!$data) returnJson(['error'=>'No metadata found in the database!'], 400);
	returnJson($data);
}

function queryDb($sql) {
	global $db;
	$res = $db->query($sql);
	if(!$res) return false;
	$data = [];
	while ( $resLine = $res->fetchArray(SQLITE3_NUM) )
		array_push($data, $resLine);
	if(count($data) == 0) return false;
	return $data;
}

function returnJson($data, $status = 200) {
	http_response_code($status);					//HTTP status code
	header('Content-Type: application/json; charset=utf-8');	//HTTP headers
	echo json_encode($data, JSON_UNESCAPED_UNICODE);		//send data
	exit();
}
?>