/**
* Checks if the route given is valid for a particular WalkInstance
* * The date must be the same
* * The start place must be within 1km of the planned start
* * The end place must be within 1km of the planned end
* * The length must be between 0.5 and 2 times the planned length
* (there is no check of start *time*)
* @param WalkInstance $w Walk to check against
* @return bool True if route matches walk
*/
public function checkAgainstWalk(WalkInstance $w, &$reason = "", &$reasonDetail = "")
{
$start = $this->getWaypoint(0);
$end = $this->getWaypoint($this->numWaypoints() - 1);
if (strftime("%F", $start->time) != strftime("%F", $w->start)) {
$reason = "Route was recorded on a different day from the walk";
$reasonDetail = "Timestamp of route is " . strftime("%d-%m-%Y", $start->time) . ", walk was on " . strftime("%d-%m-%Y", $w->start);
return false;
}
$plannedDistance = UnitConvert::distance($w->miles, UnitConvert::Mile, UnitConvert::Metre);
if ($this->distance < $plannedDistance * 0.5 || $this->distance > $plannedDistance * 2) {
$reason = "Route distance doesn't match the walk";
$reasonDetail = "Route distance is " . $this->distance . "m, planned walk distance was " . $plannedDistance . "m";
return false;
}
$plannedStart = new Waypoint();
$plannedStart->latLng = $w->startLatLng;
if ($start->distanceTo($plannedStart) > 1000) {
$reason = "Start location doesn't match planned walk";
$reasonDetail = "Start location of recorded track is " . $start->osRef->toSixFigureString() . ", should be " . $w->startGridRef;
return false;
}
$plannedEnd = new Waypoint();
$plannedEnd->latLng = $w->endLatLng;
if ($end->distanceTo($plannedEnd) > 1000) {
$reason = "End location doesn't match planned walk";
$reasonDetail = "End location of recorded track is " . $end->osRef->toSixFigureString() . ", should be " . $w->endGridRef;
return false;
}
return true;
}
