feat: add support for default prefix (#6)

src/IconRenderer.php

@@ -4,8 +4,6 @@
 
 namespace Unicon;
 
-use Illuminate\Support\Str;
-
 class IconRenderer
 {
     public function __construct(
@@ -15,14 +13,17 @@ public function __construct(
 
     public function render(string $name): ?string
     {
-        if (! Str::contains($name, ':')) {
+        $parts = explode(':', $name, 2);
+
+        $prefix = count($parts) === 2 ? $parts[0] : config('unicon.defaults.prefix');
+        $name = count($parts) === 2 ? $parts[1] : $name;
+
+        if (!$prefix) {
             throw new \InvalidArgumentException(
-                'The name must be in the format "prefix:name".',
+                'The prefix must be specified either in the name of the icon or in the configuration.',
             );
         }
 
-        [$prefix, $name] = explode(':', $name, 2);
-
         $icon = match ($isInCache = $this->cache->has($prefix, $name)) {
             true => $this->cache->pull($prefix, $name),
             false => $this->downloader->download($prefix, $name),

test/Feature/IconRendererTest.php

@@ -4,6 +4,7 @@
 
 namespace Unicon\Test\Feature;
 
+use Illuminate\Support\Facades\Config;
 use Unicon\IconCache;
 use Unicon\IconDownloader;
 use Unicon\IconRenderer;
@@ -46,4 +47,19 @@ public function it_retrieves_the_icon_from_the_cache_on_subsequent_renders()
         $renderer->render('heroicons:clock'); // downloads the icon
         $renderer->render('heroicons:clock'); // pulls the icon from the cache
     }
+
+    #[Test]
+    public function test_it_uses_the_defaullt_prefix_if_the_prefix_is_not_specified()
+    {
+        $this->partialMock(IconDownloader::class)
+            ->shouldReceive('download')
+            ->once()
+            ->with('heroicons', 'clock')
+            ->andReturn($this->icon);
+
+        Config::set('unicon.defaults.prefix', 'heroicons');
+
+        $renderer = $this->app->make(IconRenderer::class);
+        $renderer->render('clock');
+    }
 }