feat!(box): implement Stringable interface

This properly adds `Stringable` to `Box` classes, so they can be printed etc.
We still keep an extra function to create the string, because it concerns the database and should not be tied to the method that converts the object to a string in general.

CHANGELOG.md

@@ -16,6 +16,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Removed automatic SRID transformation
 - Removed st prefixed builder functions (e.g. `stSelect`, `stWhere`, ...)
 - Removed `GeometryType` Enum
+- Renamed `toString` to `toSqlString` on `Box` classes
 
 ### Added
 
@@ -26,6 +27,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added `AsGeometry` and `AsGeography` database expressions
 - Added `fromString()` to `Box` classes to create a box from a string
 - Added `JsonSerializable` to `Box2D` and `Box3D`
+- Added `Stringable` interface to all box classes
 
 ### Improved
 

src/Cast/BBoxCast.php

@@ -56,6 +56,6 @@ public function get($model, string $key, mixed $value, array $attributes)
      */
     public function set($model, string $key, mixed $value, array $attributes)
     {
-        return $value->toString();
+        return $value->toSqlString();
     }
 }

src/Data/Boxes/Box.php

@@ -6,12 +6,13 @@
 use Illuminate\Contracts\Database\Eloquent\Castable;
 use Illuminate\Contracts\Database\Query\Expression as ExpressionContract;
 use JsonSerializable;
+use Stringable;
 
-abstract class Box implements Castable, ExpressionContract, JsonSerializable
+abstract class Box implements Castable, ExpressionContract, Stringable, JsonSerializable
 {
     abstract public static function fromString(string $box): self;
 
-    abstract public function toString(): string;
+    abstract public function toSqlString(): string;
 
     /**
      * @return BBoxCast<Box>

src/Data/Boxes/Box2D.php

@@ -36,17 +36,22 @@ public function getYMax(): float
         return $this->yMax;
     }
 
-    public function toString(): string
+    public function toSqlString(): string
     {
         $min = GeometryHelper::stringifyFloat($this->xMin).' '.GeometryHelper::stringifyFloat($this->yMin);
         $max = GeometryHelper::stringifyFloat($this->xMax).' '.GeometryHelper::stringifyFloat($this->yMax);
 
         return "BOX({$min},{$max})";
     }
 
+    public function __toString(): string
+    {
+        return $this->toSqlString();
+    }
+
     public function getValue(Grammar $grammar): string
     {
-        return $grammar->quoteString($this->toString()).'::box2d';
+        return $grammar->quoteString($this->toSqlString()).'::box2d';
     }
 
     public static function fromString(string $box): self

src/Data/Boxes/Box3D.php

@@ -46,17 +46,22 @@ public function getZMax(): float
         return $this->zMax;
     }
 
-    public function toString(): string
+    public function toSqlString(): string
     {
         $min = GeometryHelper::stringifyFloat($this->xMin).' '.GeometryHelper::stringifyFloat($this->yMin).' '.GeometryHelper::stringifyFloat($this->zMin);
         $max = GeometryHelper::stringifyFloat($this->xMax).' '.GeometryHelper::stringifyFloat($this->yMax).' '.GeometryHelper::stringifyFloat($this->zMax);
 
         return "BOX3D({$min},{$max})";
     }
 
+    public function __toString(): string
+    {
+        return $this->toSqlString();
+    }
+
     public function getValue(Grammar $grammar): string
     {
-        return $grammar->quoteString($this->toString()).'::box3d';
+        return $grammar->quoteString($this->toSqlString()).'::box3d';
     }
 
     public static function fromString(string $box): self