/**
* Search for routes going from from to to
* @return array
* @param string $from
* @param string $to
* @param mixed $time
*/
public function search($from, $to, $time = false, $weekday = false, $limit = 5, $offset = 0, $timer = false)
{
if ($timer) {
$timer->tick("search", "Entering RouteSearch::search");
}
if (!$weekday) {
$weekday = (int) date("w");
}
if ($weekday == 0) {
// sunday, fix it
$weekday = 7;
}
$cacheKey = $from . $to . $time . $weekday;
$memcache = new Memcache();
$memcache->connect('localhost', 11211);
$hits = $memcache->get($cacheKey);
if ($timer) {
$timer->tick("search", "Fetched from memcache");
}
if ($hits) {
$hits = unserialize($hits);
}
if (!is_array($hits) || count($hits) == 0) {
$hits = array();
/**
* First find all buses having both stops in their path, kinda nice
*/
if ($timer) {
$timer->tick("search", "No cache");
}
$db = Config::getDb();
$start = toLower($from);
$end = toLower($to);
if ($timer) {
$timer->tick("search", "Lowercased input");
}
$buses = $db->routes->find(array('search' => array('$all' => array($start, $end))));
if ($timer) {
$timer->tick("search", "Search routes");
}
// Find some necessary data
if (!$time) {
$time = date("Hi");
}
//"0700";
$minutes = (int) substr($time, -2);
$hours = (int) substr($time, 0, -2);
$searchFilters = array();
$hitCount = 0;
$timeSort = array();
while ($route = $buses->getNext()) {
// Iterate over stops and find the
$startStop = null;
$endStop = null;
foreach ($route['stops'] as $stop) {
if (!$startStop && toLower($stop['name']) == $start) {
$startStop = $stop;
} elseif ($startStop && !$endStop && toLower($stop['name']) == $end) {
$endStop = $stop;
}
}
if ($startStop && $endStop) {
/**
* By now we have tested that we have both stops
* and in the correct order for this route
* Its time to generate the query to find departures
*/
$minuteMark = $minutes - (int) $startStop['timeOffset'];
$latestStartTime = date("Hi", mktime($hours, $minuteMark));
$startOffset = (int) $startStop['timeOffset'];
$endOffset = (int) $endStop['timeOffset'];
$runningTime = $endOffset - $startOffset;
$filters = array('route' => $route['_id'], 'time' => array('$gte' => (int) $latestStartTime), 'days' => $weekday);
$departuresForRoute = $db->departures->find($filters)->sort(array('time' => 1))->limit(15);
/**
* Loop over each departure and calculate some times
*/
while ($dep = $departuresForRoute->getNext()) {
$arrivalTime = (int) $dep['time'];
$startTime = Config::timeAdd($arrivalTime, $startOffset);
$startM = substr($startTime, -2);
$startH = substr($startTime, 0, -2);
$waitTime = ($startH - $hours) * 60 + ($startM - $minutes);
$arrivalTime = Config::timeAdd(str_replace(":", "", $startTime), $runningTime, "H:i");
while ($waitTime < 0) {
$waitTime += 1440;
}
$timeSort[] = $waitTime;
// Wait time should be arrival time minus specified search time
$hits[] = array('id' => $route['num'], 'name' => $route['dest'], 'runningTime' => $runningTime, 'startTime' => $startTime, 'wait' => $waitTime, 'arrivalTime' => $arrivalTime, 'arrivalSpan' => $runningTime + $waitTime);
}
}
}
if ($timer) {
$timer->tick("search", "Searched departures");
}
array_multisort($timeSort, SORT_ASC, $hits);
$memcache->set($cacheKey, serialize($hits), false, 120);
}
$this->count = count($hits);
return array_slice($hits, $offset, $limit);
}
