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<?php |
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declare(strict_types=1); |
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namespace Location\CardinalDirection; |
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use Location\Coordinate; |
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/** @psalm-immutable */ |
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class CardinalDirection |
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{ |
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public const CARDINAL_DIRECTION_NONE = 'none'; |
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public const CARDINAL_DIRECTION_NORTH = 'north'; |
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public const CARDINAL_DIRECTION_EAST = 'east'; |
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public const CARDINAL_DIRECTION_SOUTH = 'south'; |
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public const CARDINAL_DIRECTION_WEST = 'west'; |
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public const CARDINAL_DIRECTION_NORTHEAST = 'north-east'; |
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public const CARDINAL_DIRECTION_NORTHWEST = 'north-west'; |
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public const CARDINAL_DIRECTION_SOUTHEAST = 'south-east'; |
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public const CARDINAL_DIRECTION_SOUTHWEST = 'south-west'; |
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public function getCardinalDirection(Coordinate $point1, Coordinate $point2): string |
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{ |
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$directionFunctionMapping = [ |
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self::CARDINAL_DIRECTION_NORTH => function (Coordinate $point1, Coordinate $point2): bool { |
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return $this->isOnlyNorth($point1, $point2); |
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}, |
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self::CARDINAL_DIRECTION_EAST => function (Coordinate $point1, Coordinate $point2): bool { |
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return $this->isOnlyEast($point1, $point2); |
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}, |
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self::CARDINAL_DIRECTION_SOUTH => function (Coordinate $point1, Coordinate $point2): bool { |
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return $this->isOnlySouth($point1, $point2); |
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}, |
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self::CARDINAL_DIRECTION_WEST => function (Coordinate $point1, Coordinate $point2): bool { |
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return $this->isOnlyWest($point1, $point2); |
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}, |
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self::CARDINAL_DIRECTION_NORTHEAST => function (Coordinate $point1, Coordinate $point2): bool { |
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return $this->isNorthEast($point1, $point2); |
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}, |
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self::CARDINAL_DIRECTION_SOUTHEAST => function (Coordinate $point1, Coordinate $point2): bool { |
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return $this->isSouthEast($point1, $point2); |
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}, |
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self::CARDINAL_DIRECTION_SOUTHWEST => function (Coordinate $point1, Coordinate $point2): bool { |
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return $this->isSouthWest($point1, $point2); |
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}, |
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self::CARDINAL_DIRECTION_NORTHWEST => function (Coordinate $point1, Coordinate $point2): bool { |
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return $this->isNorthWest($point1, $point2); |
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}, |
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]; |
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foreach ($directionFunctionMapping as $direction => $checkFunction) { |
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if ($checkFunction($point1, $point2)) { |
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return $direction; |
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} |
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} |
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return self::CARDINAL_DIRECTION_NONE; |
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} |
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private function isOnlyNorth(Coordinate $point1, Coordinate $point2): bool |
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{ |
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return ( |
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!$this->isEastFrom($point1, $point2) |
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&& !$this->isSouthFrom($point1, $point2) |
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&& !$this->isWestFrom($point1, $point2) |
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&& $this->isNorthFrom($point1, $point2) |
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); |
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} |
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private function isOnlyEast(Coordinate $point1, Coordinate $point2): bool |
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{ |
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return ( |
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$this->isEastFrom($point1, $point2) |
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&& !$this->isSouthFrom($point1, $point2) |
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&& !$this->isWestFrom($point1, $point2) |
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&& !$this->isNorthFrom($point1, $point2) |
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); |
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} |
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private function isOnlySouth(Coordinate $point1, Coordinate $point2): bool |
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{ |
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return ( |
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!$this->isEastFrom($point1, $point2) |
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&& $this->isSouthFrom($point1, $point2) |
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&& !$this->isWestFrom($point1, $point2) |
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&& !$this->isNorthFrom($point1, $point2) |
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); |
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} |
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private function isOnlyWest(Coordinate $point1, Coordinate $point2): bool |
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{ |
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return ( |
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!$this->isEastFrom($point1, $point2) |
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&& !$this->isSouthFrom($point1, $point2) |
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&& $this->isWestFrom($point1, $point2) |
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&& !$this->isNorthFrom($point1, $point2) |
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); |
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} |
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private function isNorthEast(Coordinate $point1, Coordinate $point2): bool |
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{ |
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return ( |
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$this->isEastFrom($point1, $point2) |
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&& !$this->isSouthFrom($point1, $point2) |
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&& !$this->isWestFrom($point1, $point2) |
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&& $this->isNorthFrom($point1, $point2) |
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); |
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} |
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private function isSouthEast(Coordinate $point1, Coordinate $point2): bool |
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{ |
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return ( |
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$this->isEastFrom($point1, $point2) |
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&& $this->isSouthFrom($point1, $point2) |
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&& !$this->isWestFrom($point1, $point2) |
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&& !$this->isNorthFrom($point1, $point2) |
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); |
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} |
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private function isSouthWest(Coordinate $point1, Coordinate $point2): bool |
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{ |
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return ( |
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!$this->isEastFrom($point1, $point2) |
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&& $this->isSouthFrom($point1, $point2) |
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&& $this->isWestFrom($point1, $point2) |
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&& !$this->isNorthFrom($point1, $point2) |
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); |
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} |
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private function isNorthWest(Coordinate $point1, Coordinate $point2): bool |
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{ |
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return ( |
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!$this->isEastFrom($point1, $point2) |
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&& !$this->isSouthFrom($point1, $point2) |
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&& $this->isWestFrom($point1, $point2) |
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&& $this->isNorthFrom($point1, $point2) |
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); |
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} |
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private function isNorthFrom(Coordinate $point1, Coordinate $point2): bool |
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{ |
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return $point1->getLat() > $point2->getLat(); |
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} |
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private function isSouthFrom(Coordinate $point1, Coordinate $point2): bool |
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{ |
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return $point1->getLat() < $point2->getLat(); |
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} |
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private function isEastFrom(Coordinate $point1, Coordinate $point2): bool |
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{ |
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return $point1->getLng() > $point2->getLng(); |
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} |
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private function isWestFrom(Coordinate $point1, Coordinate $point2): bool |
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{ |
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return $point1->getLng() < $point2->getLng(); |
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} |
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} |
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