Added fallback for seo values

src/HasPermalinks.php

@@ -67,7 +67,7 @@ public function permalink()
      */
     public function storePermalink($attributes = [])
     {
-        $attributes = array_undot($attributes);
+        $attributes = $this->preparePermalinkAttributes($attributes);
 
         // Once we have the attributes we need to set, we will perform a new
         // query in order to find if there is any parent class set for the
@@ -76,7 +76,6 @@ public function storePermalink($attributes = [])
             $attributes['parent_id'] = $parent->getKey();
         }
 
-
         // Then we are ready to perform the creation or update action based on
         // the model existence. If the model was recently created, we'll add
         // a new permalink, otherwise, we'll update the existing permalink.
@@ -89,6 +88,29 @@ public function storePermalink($attributes = [])
         return $this;
     }
 
+    /**
+     * Prepare the seo attributes looking for default values in fallback methods.
+     *
+     * @param array $attributes
+     * @return array
+     */
+    protected function preparePermalinkAttributes($attributes = [])
+    {
+        $attributes = array_undot($attributes);
+
+        $checks = ['seo.meta.title', 'seo.meta.description'];
+
+        foreach ($checks as $check) {
+            $method = 'permalink' . studly_case(str_replace('.', ' ', $check));
+
+            if (! array_has($attributes, $check) && method_exists($this, $method)) {
+                array_set($attributes, $check, call_user_func([$this, $method]));
+            }
+        }
+
+        return $attributes;
+    }
+
     /**
      * Set the permalink parent.
      *

src/Permalink.php

@@ -50,7 +50,6 @@ public static function boot()
                 $model->slug = SlugService::createSlug($model, 'slug', $model->slug, []);
             }
         });
-
     }
 
     /**

tests/Dummy/DummyUserWithFallback.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace Devio\Permalink\Tests\Dummy;
+
+class DummyUserWithFallback extends DummyUser
+{
+    public function permalinkSeoMetaTitle()
+    {
+        return 'foo';
+    }
+
+    public function permalinkSeoMetaDescription()
+    {
+        return 'bar';
+    }
+}

tests/PermalinkCreationTest.php

@@ -4,6 +4,7 @@
 
 use Devio\Permalink\Permalink;
 use Devio\Permalink\Tests\Dummy\DummyUser;
+use Devio\Permalink\Tests\Dummy\DummyUserWithFallback;
 use Illuminate\Database\Eloquent\Relations\Relation;
 
 class PermalinkCreationTest extends TestCase
@@ -131,11 +132,34 @@ public function permalink_is_nested_with_morphed_model_name_with_full_class_name
     /** @test */
     public function permalink_creation_accepts_dot_nested_arrays()
     {
-        $user = factory(DummyUser::class)->create(['permalink' => [
-            'seo.meta' => ['title' => 'foo', 'description' => 'bar']
-        ]]);
+        $user = factory(DummyUser::class)->create([
+            'permalink' => [
+                'seo.meta' => ['title' => 'foo', 'description' => 'bar']
+            ]
+        ]);
 
         $this->assertEquals('foo', $user->permalink->seo['meta']['title']);
         $this->assertEquals('bar', $user->permalink->seo['meta']['description']);
     }
+
+    /** @test */
+    public function fallback_function_will_populate_seo_attributes()
+    {
+        $user = factory(DummyUserWithFallback::class)->create();
+
+        $this->assertEquals('foo', $user->permalink->seo['meta']['title']);
+        $this->assertEquals('bar', $user->permalink->seo['meta']['description']);
+    }
+
+    /** @test */
+    public function fallback_function_will_be_skiped_if_value_is_given()
+    {
+        $user = factory(DummyUserWithFallback::class)->create([
+            'permalink' => [
+                'seo.meta' => ['title' => 'custom']
+            ]
+        ]);
+
+        $this->assertEquals('custom', $user->permalink->seo['meta']['title']);
+    }
 }

tests/factories/DummyUserWithFallback.php

@@ -0,0 +1,12 @@
+<?php
+
+use Faker\Generator as Faker;
+use Devio\Permalink\Tests\Dummy\DummyUserWithFallback;
+
+$factory->define(DummyUserWithFallback::class, function (Faker $faker) {
+    return [
+        'name'     => $faker->name,
+        'email'    => $faker->email,
+        'password' => '123123123'
+    ];
+});