allow using fallback seo

Author: cklei-carly

config/inspirecms.php

@@ -434,6 +434,12 @@
         'segment_provider' => DefaultSegmentProvider::class,
         'preview_provider' => DefaultPreviewProvider::class,
         'slug_generator' => DefaultSlugGenerator::class,
+        'fallback_seo' => [
+            'title' => env('APP_NAME', 'Home'),
+            'description' => 'Powered by InspireCMS',
+            'keywords' => '',
+            'image' => null,
+        ],
     ],
 
     'sitemap' => [

src/Dtos/ContentDto.php

@@ -217,7 +217,28 @@ public function getSeo(?string $locale = null)
     {
         $seo = collect($this->seo);
 
-        return $seo->get($locale ?? $this->getLocale()) ?? $seo->get($this->getFallbackLocale());
+        $locale ??= $this->getLocale();
+
+        $result = $seo->get($locale);
+
+        // Using fallback locale
+        if (! $result) {
+            if (($fallbackLocale = $this->getFallbackLocale()) && ($fallbackSeo = $seo->get($fallbackLocale))) {
+                $fallbackSeo->locale = $fallbackLocale;
+                $result = $fallbackSeo;
+            }
+        } else {
+            $result->locale = $locale;
+        }
+
+        // Using default SEO data if not found
+        if (! $result) {
+            $result = SeoDto::fromArray([
+                'locale' => $locale,
+            ]);
+        }
+
+        return $result;
     }
 
     public function isRedirectable(): bool

src/Dtos/SeoDto.php

@@ -5,6 +5,7 @@
 use Illuminate\Contracts\Support\Htmlable;
 use Illuminate\Support\Collection;
 use Illuminate\Support\HtmlString;
+use SolutionForest\InspireCms\InspireCmsConfig;
 use SolutionForest\InspireCms\Support\Base\Dtos\BaseDto;
 
 class SeoDto extends BaseDto
@@ -259,6 +260,29 @@ public static function fromArray(array $parameters)
 
         $dto = parent::fromArray($parameters);
 
+        $fallbackSeo = InspireCmsConfig::get('frontend.fallback_seo', []);
+        $fallbackExtraMapper = [
+            'title' => ['ogTitle'],
+            'description' => ['ogDescription'],
+            'image' => ['ogImage'],
+        ];
+        if (is_array($fallbackSeo) && ! empty($fallbackSeo)) {
+            foreach ($fallbackSeo as $key => $value) {
+                $keysToMap = array_unique(array_merge(
+                    [$key],
+                    $fallbackExtraMapper[$key] ?? []
+                ));
+                foreach ($keysToMap ?? [] as $mappedKey) {
+                    if (! property_exists($dto, $mappedKey)) {
+                        continue;
+                    }
+                    if (! isset($dto->{$mappedKey}) || empty($dto->{$mappedKey})) {
+                        $dto->{$mappedKey} = $value;
+                    }
+                }
+            }
+        }
+
         return $dto;
     }