private function checkAreaAlarm($device, $location, $rule)
{
// Log::write("" .
// "\ncheckAreaAlarm\n" .$rule['id'].
// "\nRule:\n".print_r($rule, true)."" .
// "\nDevice\n".print_r($device, true)."" .
// "\nLocation\n".print_r($location, true) .
// "", Log::INFO);
$polygon = $this->getPathAreaPoints($rule['path_area_id']);
//将有关数字转成数字形式（否则是字符串形式，某些比较运算会有问题的）
$rule['speed'] += 0;
$location['speed'] += 0;
$rule['long'] += 0;
$rule['distance'] += 0;
$speedMsg = $this->getSpeedLimitAlarmMsg($location['speed'], $rule['speed']);
if ($rule['in_out'] == '进入') {
if (Geometry::geoPointInPolygon2($location['baidu_lat'], $location['baidu_lng'], $polygon)) {
if (empty($rule['long'])) {
$msg = '按照规则[' . $rule['label'] . ']，' . $device['target_type'] . '[' . $device['target_name'] . ']，' . '不允许在此时[' . date('Y-m-d H:i:s') . ']进入区域[' . $rule['path_area_label'] . ']，' . "而现在检测到目标在区域内（坐标：{$location['baidu_lat']}, {$location['baidu_lng']}）";
$msg .= empty($speedMsg) ? '' : '，并且' . $speedMsg;
return $this->startAlarm($device, $location, $rule, $msg);
} else {
//允许进入时间 不为0
$longInSeconds = $rule['long'] * 60;
while ($previousLocation = $this->getPreviousLocation($device['id'], $location['id'])) {
if (!Geometry::geoPointInPolygon2($previousLocation['baidu_lat'], $previousLocation['baidu_lng'], $polygon)) {
return empty($speedMsg) ? null : $this->startSpeedAlarm($device, $location, $rule);
//历史轨迹点不在区域内，不用报警（如果不超速的话）
}
$timeDiff = $this->getTimeDifference('now', $previousLocation['time']);
if ($timeDiff >= $longInSeconds) {
$msg = '按照规则[' . $rule['label'] . ']，' . $device['target_type'] . '[' . $device['target_name'] . ']，' . '不允许在此时[' . date('Y-m-d H:i:s') . ']进入区域[' . $rule['path_area_label'] . ']' . '超过' . $rule['long'] . '分钟，' . "而现在检测到目标在区域内（坐标：{$location['baidu_lat']}, {$location['baidu_lng']}），" . "并且时间已经超过" . floor($timeDiff / 60) . "分钟";
$msg .= empty($speedMsg) ? '' : '，并且' . $speedMsg;
return $this->startAlarm($device, $location, $rule, $msg);
}
}
return empty($speedMsg) ? null : $this->startSpeedAlarm($device, $location, $rule);
//已经 没有上一个定位了（时间仍不够长），不用报警
}
} else {
//不允许进入，但是现在点不在区域内，仍有可能需要报警：如果当前点和上一个轨迹点的线段切割区域多边形的话。
$previousLocation = $this->getPreviousLocation($device['id'], $location['id']);
$timeDiff = floor($this->getTimeDifference('now', $previousLocation['time']) / 60);
if ($timeDiff >= $rule['long'] && Geometry::geoSegmentCuttingPolygon($previousLocation['baidu_lat'], $previousLocation['baidu_lng'], $location['baidu_lat'], $location['baidu_lng'], $polygon)) {
$msg = '按照规则[' . $rule['label'] . ']，' . $device['target_type'] . '[' . $device['target_name'] . ']，' . '不允许在此时[' . date('Y-m-d H:i:s') . ']进入区域[' . $rule['path_area_label'] . ']' . (empty($rule['long']) ? '' : '超过' . $rule['long'] . '分钟') . "，而现在检测到目标的当前位置与上一个定位点的轨迹路线经过该区域" . (empty($rule['long']) ? '' : '，并且两轨迹点时间间隔已经超过' . $timeDiff . '分钟');
$msg .= empty($speedMsg) ? '' : '，并且' . $speedMsg;
return $this->startAlarm($device, $location, $rule, $msg);
}
return null;
}
} else {
//离开区域报警
$distance = round(Geometry::geoPointDistancePolygon($location['baidu_lat'], $location['baidu_lng'], $polygon));
if (!Geometry::geoPointInPolygon2($location['baidu_lat'], $location['baidu_lng'], $polygon) && $distance >= $rule['distance']) {
if (empty($rule['long'])) {
// 时长限制为0
$msg = '按照规则[' . $rule['label'] . ']，' . $device['target_type'] . '[' . $device['target_name'] . ']，' . '不允许在此时[' . date('Y-m-d H:i:s') . ']离开区域[' . $rule['path_area_label'] . ']' . $rule['distance'] . '米，' . "而现在检测到目标在区域外（坐标：{$location['baidu_lat']}, {$location['baidu_lng']}），距离区域" . $distance . '米';
$msg .= empty($speedMsg) ? '' : '，并且' . $speedMsg;
return $this->startAlarm($device, $location, $rule, $msg);
} else {
//允许离开一段时间
$longInSeconds = $rule['long'] * 60;
$curLocationId = $location['id'];
while ($previousLocation = $this->getPreviousLocation($device['id'], $curLocationId)) {
$historyDist = Geometry::geoPointDistancePolygon($previousLocation['baidu_lat'], $previousLocation['baidu_lng'], $polygon);
if (Geometry::geoPointInPolygon2($previousLocation['baidu_lat'], $previousLocation['baidu_lng'], $polygon) || $historyDist < $rule['distance']) {
//历史轨迹点在区域内或者离开距离不够
return empty($speedMsg) || $distance < $rule['distance'] ? null : $this->startSpeedAlarm($device, $location, $rule);
}
$timeDiff = $this->getTimeDifference('now', $previousLocation['time']);
if ($timeDiff >= $longInSeconds) {
$msg = '按照规则[' . $rule['label'] . ']，' . $device['target_type'] . '[' . $device['target_name'] . ']，' . '不允许在此时[' . date('Y-m-d H:i:s') . ']离开区域[' . $rule['path_area_label'] . ']' . $rule['distance'] . '米，' . '超过' . $rule['long'] . '分钟，' . "而现在检测到目标在区域外（坐标：{$location['baidu_lat']}, {$location['baidu_lng']}），" . "并且离开区域至少" . $rule['distance'] . '米' . "已经超过" . floor($timeDiff / 60) . "分钟";
$msg .= empty($speedMsg) ? '' : '，并且' . $speedMsg;
return $this->startAlarm($device, $location, $rule, $msg);
}
$curLocationId = $previousLocation['id'];
}
return empty($speedMsg) || $distance < $rule['distance'] ? null : $this->startSpeedAlarm($device, $location, $rule);
//已经 没有上一个定位了（时间仍不够长），不用报警
}
}
return null;
//轨迹点在区域里面，不用报警
}
}