<?php
// Notes
// The api key from Scooty's app/account: iPtAHWdOVLEtgkaymXoMHVVg
// Below is the static html to generate the map, it can also be done more dynamically using https://github.com/LuminFire/leaflet-php  but that might be overkill

//debugging, enable all error reporting
// ini_set('display_errors', 1);
// ini_set('display_startup_errors', 1);
// error_reporting(E_ALL);
//measure script execution time
$start_time = microtime(true); 
$a=1; 


// array of scooters, artist, title, description
global $scooters;

$scooters = array(
    array('https://opencoil.show/test-json.php?scooterID=1', 'artist name 0', 'title 0', 'desciption 0' ),
    array('https://opencoil.show/test-json.php?scooterID=2', 'artist name 1', 'title 1', 'desciption 1' ),
    array('https://opencoil.show/test-json.php?scooterID=3', 'artist name 2', 'title 2', 'desciption 2' ),
    //array('https://platform.tier-services.io/v1/vehicle/fbd739d6-554f-4eaf-bd9c-afe3d501c94b', 'artist name 1', 'title', 'desciption'),

); 


// for each scooter in array get the json (TODO, for each, safe to file/database?) $scooters is a multidimensional array: $scooter[0][0] = the first data (api url) of the first scooter,  $scooter[1][0] = the first data (api url) of the second scooter,  $scooter[0][1] = the artist name of the first scooter etcetc.

//$id = 0; //get the first scooter for now


function saveLatestJSON(){
global $scooters; //"import" the global variable into the function's scope
    
    //TODO if latestData.json = older than ..2 minutes...call the API again
    $id = 0; //start id
    foreach($scooters as $item) {
        $getJSON = callAPI($scooters[$id][0]); //abstract callAPI for neater reuse
        // GET RID OF JSON DECODE!
        $arr = json_decode($getJSON, true); // decode JSON data to PHP associative array
        // access values from the associative array
        $lat = $arr["data"]["attributes"]["lat"];  // get lattitude
        $lng = $arr["data"]["attributes"]["lng"];  // get longitude
        $pos = $lat.', '.$lng; // construct lat/lon for use in leafet
        $lst = $arr["data"]["attributes"]["lastLocationUpdate"];  // get time of last position
        $rnt = $arr["data"]["attributes"]["isRentable"]; // check if scooter is rentable,  
        $act = $arr["data"]["attributes"]["state"]; // check if scooter is ACTIVE or MAINTAINANCE
        // access values from the multidimensional $scooters array
        $nam = $scooters[$id][1]; // get the artist name
        $tit = $scooters[$id][2]; // get the works title
        $des = $scooters[$id][3]; // get the works description

        //construct json with latest data
        $latestData[] = array( "ID" => $id,
                            "lastPos" => $pos,
                            "lastLocationUpdate" => $lst,
                            "isRentable" => $rnt,
                            "state" => $act,
                            "name" => $nam,
                            "title" => $tit,
                            "desc" => $des);
        $id++;
    }

    return $latestData; //return array

}
    
// THIS ONLY NEEDS TO RUN EVERY 1 or 2 minutes, possibly in the background, als this should construct historical json as per tom martins post here: https://stackoverflow.com/questions/7895335/append-data-to-a-json-file-with-php/7895384


//TODO make historical json file..
//see: https://stackoverflow.com/questions/7895335/append-data-to-a-json-file-with-php/7895384
    //add something like:
//     $inp = file_get_contents('./latestData.json');
// $tempArray = json_decode($inp);
// $tempArray[] .= $latestData;
// $jsonData = json_encode($tempArray);
// file_put_contents('./latestData.json', $jsonData);
   

function makeMarker(int $id){ // generate appropriate markers based on latest JSON

    $readJSON = file_get_contents('./latestData.json'); //read latest data
    $arr = json_decode($readJSON, true);

    $pos = $arr[$id]["lastPos"];  // get last known position
    $lst = $arr[$id]["lastLocationUpdate"];   // get time of last position
    $rnt = $arr[$id]["isRentable"];  // check if scooter is rentable,  
    $act = $arr[$id]["state"]; // check if scooter is ACTIVE or MAINTAINANCE
    // access values from the multidimensional $scooters array
    $nam = $arr[$id]["name"];  // get the artist name
    $tit = $arr[$id]["title"];  // get the works title
    $des = $arr[$id]["desc"];  // get the works description


    //check scooter status and construct marker with corresponding icon

    //check if scooter is rentable
    if($rnt == true && $act === 'ACTIVE'){ 
        $marker =   'var scooter'.$id.' = L.marker(['.$pos.'], {time: "'.$lst.'"}).addTo(map)
                .bindPopup("<b>'.$tit.'</b><br>'.$des.'<br>Last updated: '.$lst.'<br>Status: Rentable, Gallery Offline")
                .bindTooltip("'.$nam.'").setIcon(availableIcon);';
                
    } elseif ($rnt == false && $act === 'ACTIVE') { 
        $marker =   'var scooter'.$id.' = L.marker(['.$pos.'], {time: "'.$lst.'"}).addTo(map)
                .bindPopup("<b>'.$tit.'</b><br>'.$des.'<br>Last updated: '.$lst.'<br>Status: Rented Out, Gallery Online")
                .bindTooltip("'.$nam.'").setIcon(isRentedIcon);';
                
    };
    //check if scooter is in maintenace
    if($act !== "ACTIVE"){
        $marker =   'var scooter'.$id.' = L.marker(['.$pos.'], {time: "'.$lst.'"}).addTo(map)
                .bindPopup("<b>'.$tit.'</b><br>'.$des.'<br>Last updated: '.$lst.'")
                .bindTooltip("'.$nam.'").setIcon(isMaintenanceIcon);';
    };        

    return $marker;


}


function appendJSON($filename, $data){ // create historical json data for documentation over time

    // read the file if present
    $handle = @fopen($filename, 'r+');

    // create the file if needed
    if ($handle === null)
    {
        $handle = fopen($filename, 'w+');
    }

    if ($handle)
    {
        // seek to the end
        fseek($handle, 0, SEEK_END);

        // are we at the end of is the file empty
        if (ftell($handle) > 0)
        {
            // move back a byte
            fseek($handle, -1, SEEK_END);

            // add the trailing comma
            fwrite($handle, ',', 1);

            // add the new json string
            fwrite($handle, json_encode($data) . ']');
        }
        else
        {
            // write the first event inside an array
            fwrite($handle, json_encode(array($data)));
        }

            // close the handle on the file
            fclose($handle);
    }


}


//// make date time file------


///..mmm one big one? seperate ones, timestamped ones?
// 60 second update interval

// make timestamp file like original python one! to check for updates
// make new custom json:
//      scooter 1/marker time1 { lat long }
//                       time2 { lat long }
//      scooter 2/marker time1 { lat long }
//                       time2 { lat long }
//
//


// for each
// check if lastlocation is different...if update > latest file (map file..)
// check if is rentable

// TODO make two files
// 1: current position and state of scooter, latlong, id, status
// 2: historical json file, contains all scooters, updated everytime php file is loaded (or every 60 sec). No state changes, only lat long and time. even if time does not change


// Custom functions


function callAPI($url){
        $curl = curl_init($url);
        curl_setopt($curl, CURLOPT_FAILONERROR, true);
        curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);  
        curl_setopt($curl, CURLOPT_HTTPHEADER, array(
                'x-api-key: bpEUTJEBTf74oGRWxaIcW7aeZMzDDODe1yBoSxi2',
                'Content-Type: application/json',
        )); // set the api key
        curl_setopt($curl, CURLOPT_USERAGENT,'ProductionRelease/3.8.2 (app.tier.sharing; build:3.8.2.0; iOS 12.4.4) Alamofire/4.9.1'); // set user-agent to that of the Tier.app, sniffed by burpsuite

        $result = curl_exec($curl);
        if(!$result){die("Connection Failure");}
        curl_close($curl);
        return $result;
}


?>


<html>
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width,initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />

        <script src="https://code.jquery.com/jquery-1.12.4.min.js"></script>
        <link rel="stylesheet" type="text/css" href="https://unpkg.com/leaflet@1.3.3/dist/leaflet.css">
        <script src='https://unpkg.com/leaflet@1.3.3/dist/leaflet.js'></script>
        <!--  icons -->
        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/Leaflet.awesome-markers/2.0.2/leaflet.awesome-markers.js"></script>
        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/leaflet@1.6.0/dist/leaflet.css"/>
        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css"/>
        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap-theme.min.css"/>
        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css"/>
        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/Leaflet.awesome-markers/2.0.2/leaflet.awesome-markers.css"/>
        <link rel="stylesheet" href="https://rawcdn.githack.com/python-visualization/folium/master/folium/templates/leaflet.awesome.rotate.css"/>

        <!-- begin timeslider -->

        <script src="SliderControl.js"></script>
        <script src="http://code.jquery.com/ui/1.9.2/jquery-ui.js"></script>
        <link rel="stylesheet" href="http://code.jquery.com/ui/1.9.2/themes/base/jquery-ui.css"/>
        <script src="//cdnjs.cloudflare.com/ajax/libs/jqueryui-touch-punch/0.2.2/jquery.ui.touch-punch.min.js"></script>
        <!-- end of timeslider -->
        <style>
            #map {
                height: 500px
            }
        </style>
        <script>
            L_NO_TOUCH = false;
            L_DISABLE_3D = false;
        </script>
    </head>
<body>
    <div id="map"></div>
    <script>
        // define icons   
        // prefix: glyphicon = bootstrap, list can be found here: https://getbootstrap.com/docs/3.3/components/
        // prefix: fa = fontawesome, list is here: https://fontawesome.com/v4.7.0/cheatsheet/
        var availableIcon = L.AwesomeMarkers.icon(
            {"icon": "wifi", "iconColor": "white", "markerColor": "purple", "prefix": "fa"}
        );
        var isRentedIcon = L.AwesomeMarkers.icon(
            {"icon": "hourglass-half", "iconColor": "white", "spin": "true", "markerColor": "pink", "prefix": "fa"}
        );
        var isMaintenanceIcon = L.AwesomeMarkers.icon(
            {"icon": "wrench", "iconColor": "white", "markerColor": "black", "prefix": "fa"}
        );


        var map = L.map('map').setView([52.516190, 13.377693], 13);

        var Stamen_Toner = L.tileLayer('https://stamen-tiles-{s}.a.ssl.fastly.net/toner/{z}/{x}/{y}.{ext}', {
        attribution: 'Map tiles by <a href="http://stamen.com">Stamen Design</a>, <a href="http://creativecommons.org/licenses/by/3.0">CC BY 3.0</a> &mdash; Map data &copy; <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a>',
        subdomains: 'abcd',
        minZoom: 0,
        maxZoom: 20,
        ext: 'png'
        });
        map.addLayer(Stamen_Toner);


        //the magic: for each scooter in $scooters array, request status and construct marker
        <?php 

        $filename = "./latestData.json"; //latest locations, 1 entry per scooter
        $filename_history = "./historicalData.json"; //historical locations

        // check how old the latest json is
        if (time()-filemtime($filename) > 60) { //if older than 60 seconds
            $arrayToEcho = saveLatestJSON();
            //append to historical json
            appendJSON($filename_history, $arrayToEcho);

            $latestData = json_encode($arrayToEcho, JSON_FORCE_OBJECT); // force object accepts 0 as a key for the array and not NULL
            file_put_contents($filename, $latestData, LOCK_EX);


            $id = 0; //start id
            foreach($scooters as $item) {
                echo makeMarker($id);
                $id++;
            }

        } else { // file younger than 60 seconds
            
            $id = 0; //start id
            foreach($scooters as $item) {
                echo makeMarker($id);
                $id++;
            }
        }


        ?>

        // time slider

        //test markers
        //var marker1 = L.marker([52.504926, 13.358061], {time: "2020-10-09T08:00:29Z"});
        //var marker2 = L.marker([52.506926, 13.358061], {time: "2020-10-09T09:00:29Z"});
        //var marker3 = L.marker([52.508926, 13.358061], {time: "2020-10-09T10:00:29Z"});

        // var map = marker1;
        // layerGroup = L.layerGroup([marker_e7a96a6d6b08479ba6d17d42769e5202]);
        layerGroup = L.layerGroup([scooter0, scooter1, scooter2]); //make this dynamic
        var sliderControl = L.control.sliderControl({layer:layerGroup});
        map.addControl(sliderControl);
        sliderControl.startSlider();
    </script>
</body>
</html>

<?php //end of measuring script execution time
//end clock time in seconds 
$end_time = microtime(true); 
//calculate script execution time 
$execution_time = ($end_time - $start_time); 
echo " Execution time of script = ".$execution_time." sec"; 
?>