First commit

packages/mmt/ddd-shared-kernel/ValueObjects/Money.php

@@ -0,0 +1,73 @@
+<?php
+
+namespace MMT\DDDSharedKernel\ValueObjects;
+
+final class Money extends ValueObject
+{
+
+    public function __construct(
+        public private(set) int $amount,
+        public private(set) string $currency
+    )
+    {
+
+    }
+
+    public function __toString() : string
+    {
+        $amount = $this->toFloat();
+
+        return $this->isPositive()
+            ? "{$this->currency} {$amount}"
+            : "-{$this->currency} {-$amount}";
+    }
+
+    public function toFloat() : float
+    {
+        return round($this->amount /100, 2);
+    }
+
+    public function formatted() : string
+    {
+        $amount = $this->toFloat();
+
+        return $this->isPositive()
+            ? "\${$amount}"
+            : "-\${-$amount}"; 
+    }
+
+    public function isPositive() : bool
+    {
+        return $this->amount >= 0;
+    }
+
+    public function isNegative() : bool
+    {
+        return $this->amount < 0;
+    }
+
+    public function isZero() : bool
+    {
+        return $this->amount === 0;
+    }
+
+    public function greaterThan(Money $other) : bool
+    {
+        return $this->amount > $other->amount;
+    }
+
+    public function greaterThanOrEqual(Money $other) : bool
+    {
+        return $this->amount >= $other->amount;
+    }
+
+    public function lessThan(Money $other) : bool
+    {
+        return $this->amount < $other->amount;
+    }
+
+    public function lessThanOrEqual(Money $other) : bool
+    {
+        return $this->amount <= $other->amount;
+    }
+}