/**
We don't care about closed paths. These are the conditions for a failed path:
1. If the path dead-ends.
2. If the path attempts to loop back on itself.
3. If the path exceeds the time of an already completed path.
*/
function algorithm($start, $end)
{
$debug = true;
outputDebug("→ algorithm.algorithm()", $debug);
outputDebug("start = " . $start->toString(), $debug);
outputDebug("end = " . $end->toString(), $debug);
$completedPaths = array();
$starting = array();
$finishing = array();
$startPaths = array();
$endPaths = array();
$starts = findStartStations($start, $end);
foreach ($starts as $metaPathArray) {
foreach ($metaPathArray as $metaPath) {
if ($metaPath->getStatus() == "complete") {
$completedPaths = addPath($completedPaths, $metaPath->path);
continue;
}
$currentStation = $metaPath->path->getCurrentStation();
$startPaths = createPaths2($currentStation, $end, $startPaths);
$array = $starting[$currentStation->getID()];
if ($array == null) {
$array = array();
}
$duration = $metaPath->path->duration;
$array["{$duration}"] = $metaPath->path;
$starting[$currentStation->getID()] = $array;
}
}
$ends = findStartStations($end, $start);
foreach ($ends as $metaPathArray) {
foreach ($metaPathArray as $metaPath) {
if ($metaPath->getStatus() == "complete") {
$completedPaths = addPath($completedPaths, $metaPath->path);
continue;
}
$currentStation = $metaPath->path->getCurrentStation();
$endPaths = createPaths2($currentStation, $start, $endPaths);
//$starting[$currentStation->getID()] = $metaPath->path;
$array = $finishing[$currentStation->getID()];
if ($array == null) {
$array = array();
}
$duration = $metaPath->path->duration;
$array["{$duration}"] = $metaPath->path;
$finishing[$currentStation->getID()] = $array;
}
}
// determine start type and, if necessary, create the first segment
/*if ($start instanceof Station2) {
outputDebug("*** creating startPaths ***", $debug);
$startPaths = createPaths($start, $end);
outputDebug("*** creating startPaths : DONE ***", $debug);
}
// determine end type and, if necessary, create the end segment
if ($end instanceof Station2) {
outputDebug("*** creating endPaths ***", $debug);
$endPaths = createPaths($end, $start);
outputDebug("*** creating endPaths : DONE ***", $debug);
}*/
$finished = array();
outputDebug("start search.", $debug);
$completedPaths = algorithmLoop3($startPaths, $endPaths, $completedPaths);
outputDebug("total number of paths found = " . count($completedPaths), $debug);
foreach ($completedPaths as $path) {
outputDebug("completedPath is " . $path->toString(), $debug);
$station = $path->getFirstStation();
$startArray = $starting[$station->getID()];
ksort($startArray);
$startPath = array_shift($startArray);
if ($startPath != null) {
outputDebug("adding startPath: " . $startPath->toString(), $debug);
$path = new Path($startPath, $path);
}
$station = $path->getCurrentStation();
$finishArray = $finishing[$station->getID()];
ksort($finishArray);
$finishPath = array_shift($finishArray);
if ($finishPath != null) {
outputDebug("adding finishPath: " . $finishPath->toString(), $debug);
$path = mergePaths($path, $finishPath);
}
outputDebug("real path is " . $path->toString(), $debug);
$finished[] = $path;
}
return $finished;
//return algorithmLoop2($starts, $ends);
}
/**
We don't care about closed paths. These are the conditions for a failed path:
1. If the path dead-ends.
2. If the path attempts to loop back on itself.
3. If the path exceeds the time of an already completed path.
*/
function algorithm($start, $end)
{
$debug = true;
outputDebug("→ algorithm.algorithm()", $debug);
outputDebug("start = " . $start->toString(), $debug);
outputDebug("end = " . $end->toString(), $debug);
$starts = findStartStations($start, $end);
$ends = findStartStations($end, $start);
// determine start type and, if necessary, create the first segment
/*
if ($start instanceof Station2) {
outputDebug("*** creating startPaths ***", $debug);
$startPaths = createPaths($start, $end);
outputDebug("*** creating startPaths : DONE ***", $debug);
}
// determine end type and, if necessary, create the end segment
if ($end instanceof Station2) {
outputDebug("*** creating endPaths ***", $debug);
$endPaths = createPaths($end, $start);
outputDebug("*** creating endPaths : DONE ***", $debug);
}
*/
//return algorithmLoop($startPaths, $endPaths);
return algorithmLoop2($starts, $ends);
}