Add support for Favicons (#11)

* wip

* wip

* wip

* Update tests/Pest/FaviconTest.php

Co-authored-by: Samuel Štancl <samuel.stancl@gmail.com>

* Update tests/Pest/FaviconTest.php

Co-authored-by: Samuel Štancl <samuel.stancl@gmail.com>

* Update README.md

Co-authored-by: Samuel Štancl <samuel.stancl@gmail.com>

README.md

@@ -99,6 +99,18 @@ When a value is set specifically for Twitter, it will be prioritized over the ge
 seo()->twitterTitle('About us')
 ```
 
+### Favicons
+
+By default, no favicon links will be included. You can manually enable the extension by calling:
+
+```php
+seo()->favicon('path/to/logo.png');
+```
+
+We'll generate a 32x32px `public/favicon.ico` & `public/favicon.png` icon. This should be sufficient for most cases.
+
+**Please keep in mind that you need to install the [imagick](https://pecl.php.net/package/imagick) php extension and [intervention/image](http://image.intervention.io/) composer package.**
+
 ### Defaults
 
 To configure default values, call the methods with the `default` argument:

assets/views/components/extensions/favicon.blade.php

@@ -0,0 +1,2 @@
+<link rel="icon" type="image/x-icon" href="{{ asset('favicon.ico') }}">
+<link rel="icon" type="image/png" href="{{ asset('favicon.png') }}">

composer.json

@@ -31,7 +31,8 @@
         "orchestra/testbench": "^6.9",
         "nunomaduro/larastan": "^0.6.10",
         "pestphp/pest": "^1.2",
-        "pestphp/pest-plugin-laravel": "^1.0"
+        "pestphp/pest-plugin-laravel": "^1.0",
+        "intervention/image": "^2.7"
     },
     "extra": {
         "laravel": {

src/SEOManager.php

@@ -5,7 +5,9 @@ declare(strict_types=1);
 namespace ArchTech\SEO;
 
 use Closure;
+use Exception;
 use Illuminate\Support\Str;
+use Intervention\Image\ImageManager;
 
 /**
  * @method $this title(string $title = null, ...$args) Set the title.
@@ -176,6 +178,40 @@ class SEOManager
         return $this->set('image', "https://s.useflipp.com/{$template}.png?s={$signature}&v={$query}");
     }
 
+    /** Enable favicon extension. */
+    public function favicon(string $path): static
+    {
+        if (! class_exists(ImageManager::class)) {
+            throw new Exception('Intervention not available, please run `composer require intervention/image`');
+        }
+
+        $this->extensions['favicon'] = true;
+
+        $doesntHaveFavicon = ! file_exists(public_path('favicon.ico'));
+        $sourceIconDoesntExist = ! file_exists($path);
+
+        if ($sourceIconDoesntExist) {
+            throw new Exception("Given icon path `{$path}` does not exist.");
+        }
+
+        if ($doesntHaveFavicon) {
+            // GD driver doesn't support .ico, that's why we use ImageMagick.
+            $manager = new ImageManager(['driver' => 'imagick']);
+
+            $manager
+                ->make($path)
+                ->resize(32, 32)
+                ->save(public_path('favicon.ico'));
+
+            $manager
+                ->make($path)
+                ->resize(32, 32)
+                ->save(public_path('favicon.png'));
+        }
+
+        return $this;
+    }
+
     /** Append canonical URL tags to the document head. */
     public function withUrl(): static
     {

tests/Pest/FaviconTest.php

@@ -0,0 +1,14 @@
+<?php
+
+use function PHPUnit\Framework\assertFileExists;
+
+test("it should throw an exception if the given source icon doesn't exist", function () {
+    seo()->favicon('i-dont-exist.png');
+})->throws(Exception::class, 'Given icon path `i-dont-exist.png` does not exist.');
+
+test('it should generate two favicons', function () {
+    seo()->favicon(__DIR__ . '/../stubs/logo.png');
+
+    assertFileExists(public_path('favicon.ico'));
+    assertFileExists(public_path('favicon.png'));
+});