Initial commit

src/CurrencyManager.php

@@ -0,0 +1,82 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ArchTech\Money;
+
+use ArchTech\Money\Concerns\PersistsCurrency;
+use ArchTech\Money\Concerns\RegistersCurrencies;
+use ArchTech\Money\Currencies\USD;
+
+class CurrencyManager
+{
+    use RegistersCurrencies, PersistsCurrency;
+
+    /** The default currency's code. */
+    protected string $default = 'USD';
+
+    /** The current currency's code. */
+    protected string $current;
+
+    public function __construct()
+    {
+        $this->reset();
+    }
+
+    /** Reset the object to the default state. */
+    public function reset(): static
+    {
+        $this->currencies = [
+            'USD' => new USD,
+        ];
+
+        $this->default = 'USD';
+
+        $this->forgetCurrent();
+
+        return $this;
+    }
+
+    public function forgetCurrent(): static
+    {
+        unset($this->current);
+
+        return $this;
+    }
+
+    /** Get the default currency. */
+    public function getDefault(): Currency
+    {
+        return $this->get($this->default);
+    }
+
+    /** Set the default currency. */
+    public function setDefault(string $currency): static
+    {
+        $code = $this->getCode($currency);
+
+        $this->ensureCurrencyExists($code);
+
+        $this->default = $code;
+
+        return $this;
+    }
+
+    /** Get the current currency. */
+    public function getCurrent(): Currency
+    {
+        return $this->get($this->current ??= $this->resolveCurrent() ?? $this->default);
+    }
+
+    /** Set the current currency. */
+    public function setCurrent(Currency|string $currency): static
+    {
+        $code = $this->getCode($currency);
+
+        $this->ensureCurrencyExists($code);
+
+        $this->storeCurrent($this->current = $code);
+
+        return $this;
+    }
+}