Add icon aliases

Author: Nate Wiebe

src/Exception/AliasDefinedException.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace Feather\Exception;
+
+class AliasDefinedException extends \Exception
+{
+
+}

src/IconManager.php

@@ -2,6 +2,7 @@
 
 namespace Feather;
 
+use Feather\Exception\AliasDefinedException;
 use Feather\Exception\IconNotFoundException;
 
 class IconManager
@@ -10,6 +11,8 @@ class IconManager
 
     private $icons;
 
+    private $aliases = [];
+
     public function __construct()
     {
         $this->attributes = require \implode(DIRECTORY_SEPARATOR, [\dirname(__FILE__), '..', 'resources', 'attributes.php']);
@@ -23,10 +26,37 @@ public function getIconNames(): array
 
     public function getIcon(string $name, array $attributes = []): Icon
     {
+        $name = $this->normalizeIconName($name);
+
         if (!isset($this->icons[$name])) {
             throw new IconNotFoundException(\sprintf('Icon `%s` not found', $name));
         }
 
         return new Icon($name, \array_merge($this->attributes, $attributes), $this->icons[$name]);
     }
+
+    public function addAlias(string $alias, string $iconName): self
+    {
+        if (isset($this->aliases[$alias])) {
+            throw new AliasDefinedException(\sprintf('Alias `%s` already defined', $alias));
+        }
+
+        if (!isset($this->icons[$iconName])) {
+            throw new IconNotFoundException(\sprintf('Icon `%s` not found', $iconName));
+        }
+
+        $this->aliases[$alias] = $iconName;
+
+        return $this;
+    }
+
+    public function getIconAliases(): array
+    {
+        return $this->aliases;
+    }
+
+    private function normalizeIconName(string $name): string
+    {
+        return $this->aliases[$name] ?? $name;
+    }
 }