unc_divesites.inc.php

<?php

function uncd_divesites_shortcode($atts = array()) {
    // first, get all categories and their data

    global $UNC_DIVELOG;
    if (strlen($UNC_DIVELOG['google_api_key']) < 1) {
        return "You need to set a google api key in the configuration to use this feature!";
    }

    $cats = get_categories();

    $lats = array();
    $lens = array();
    $markers_list = "var points = [\n";
    $z_index = 100;

    $levels = array(
        'Countries' => 3,
        'Region' => 5,
        'Divesite'  => 10
    );

    $level = filter_input(INPUT_GET, 'level', FILTER_SANITIZE_STRING);
    $level_id = filter_input(INPUT_GET, 'id', FILTER_SANITIZE_STRING);
    if (!isset($levels[$level])) {
        $level = 'Countries';
    }

    $level_name = '';

    foreach ($cats as $C){
        if ($level_id == $C->cat_ID) {
            $level_name = $C->name;
        }

        if ($level == 'Countries' && $C->parent <> 0) {
            continue;
        } else if ($level == 'Countries') { // link to region map
            $link = get_page_link() . '?level=Region&id=' . $C->cat_ID;
        } else if (($level == 'Region' || $level == 'Divesite') && $C->parent <> $level_id) {
            continue;
        } else if ($level == 'Region') {
            $link = get_page_link() . '?level=Divesite&id=' . $C->cat_ID;
        } else if ($level == 'Divesite') {
            $link = get_category_link($C->cat_ID);
        }
        // var_dump($C);
        $location_name = $C->name . " (" . $C->count . " dives)";

        //echo $C->parent;
        //echo $C->description;
        //echo $C->slug;
        //echo $C->count;

        $coords = explode(",", $C->description);
        if (count($coords) != 2) {
            continue;
        }
        $lat = trim($coords[0]);
        $lats[] = $lat;
        $len = trim($coords[1]);
        $lens[] = $len;
        $slug = $C->slug;

        $markers_list .= "['$location_name',$lat,$len,$z_index,'$link','$slug'],\n";
        $z_index ++;
    }
    $markers_list .= "\n];\n";
    $avg_lat = array_sum($lats) / count($lats);
    $avg_len = array_sum($lens) / count($lens);

    $zoom = $levels[$level];
    $out = "<h2>Detail Level: $level $level_name</h2>";

    // mapwithmarker reference:
    // http://google-maps-utility-library-v3.googlecode.com/svn/trunk/markerwithlabel/docs/reference.html

    // on-hover visibility method from
    // http://stackoverflow.com/questions/25981512/markerwithlabel-mouseover-issue

    $out .= '
    <div id="map" style="height:600px"></div>

    <script>
        var map;
        var marker;
        function initMap() {
            map = new google.maps.Map(document.getElementById(\'map\'), {
                center: {lat: '.$avg_lat.', lng: '.$avg_len.'},
                zoom: '.$zoom.',
                mapTypeId: google.maps.MapTypeId.HYBRID
            });
            ' . $markers_list . '
            for (var i = 0; i < points.length; i++) {
                var point = points[i];
                marker = MarkerWithLabelAndHover(
                    new MarkerWithLabel({
                        pane: "overlayMouseTarget",
                        position: new google.maps.LatLng(point[1], point[2]),
                        labelContent: "",
                        hoverContent: point[0] + "<br>Click to open",
                        labelAnchor: new google.maps.Point(40, -5),
                        map: map,
                        labelClass: "labels",
                        hoverClass: "hoverlabels",
                        url: point[4],
                    })
                );
                google.maps.event.addListener(marker, \'click\', function() {
                    window.location.href = this.url;
                });
            }
        }
        google.maps.event.addDomListener(window, \'load\', initMap);
    </script>';
    return $out;
}