public static function image_tag($size, $trip, $upcoming_stops) {
$tag = '';
$url = "http://maps.google.com/maps/api/staticmap?";
$center = '42.35904, -71.09355';
$zoom = 13;
$markers = "color:red";
foreach ($upcoming_stops as $stop) {
$stop = ShuttleSchedule::getStop($stop);
$markers .= '|' . $stop->lat . ',' . $stop->lon;
}
$params = array(
'size' => $size . 'x' . $size,
'markers' => $markers,
'sensor' => 'false',
);
if (count($trip->shape->points) > 1) {
$path = 'weight:3|color:red|enc:';
$numPoints = count($trip->shape->points);
$totalCount = 0;
$usedCount = 0;
$prevLat = 0;
$prevLon = 0;
$latSum = 0;
$lonSum = 0;
foreach ($trip->shape->points as $point) {
$latSum += $point[0];
$lonSum += $point[1];
$lat = $point[0] - $prevLat;
$lon = $point[1] - $prevLon;
$prevLat = $point[0];
$prevLon = $point[1];
$path .= base64EncodeNumber($lat) . base64EncodeNumber($lon);
$usedCount++;
}
$center = strval($latSum / $usedCount) . ',' . strval($lonSum / $usedCount);
$params['path'] = $path;
} else {
$params['zoom'] = $zoom;
}
$params['center']= $center;
$query = $url . http_build_query($params);
$tag = '<img src="' . $query . '" width="' . $size
. '" height="' . $size . '" id="mapimage" alt="Map" />';
return $tag;
}
$stop_id = $row['stop_id'];
$next_seconds = -1;
$source = 'null';
$route_preds = ShuttleSchedule::getNextLoop($route_id);
if (array_key_exists('lastUpdate', $route_preds)) {
unset($route_preds['lastUpdate']);
$source = 'nextbus';
} else {
$source = 'schedule';
}
$stop_preds = $route_preds[$stop_id];
$next_time = $stop_preds[0];
$next_seconds = $next_time - $time;
$stopname = ShuttleSchedule::getStop($stop_id)->name;
if ($next_seconds > 0 && $next_seconds < SHUTTLE_NOTIFY_THRESHOLD) {
$shuttle = $route->long_name;
$minutes = intval($next_seconds / 60);
$timestr = date('g:ia', $next_time);
switch ($source) {
case 'nextbus':
$message = "$shuttle arriving at $stopname in $minutes minutes ($timestr)";
break;
case 'schedule':
$message = "$shuttle (NOT GPS TRACKED) scheduled to arrive at $stopname in $minutes minutes ($timestr)";
break;
}
