new: add channel management

app/Repositories/Shop/Offers.php

@@ -3,6 +3,8 @@
 namespace App\Repositories\Shop;
 
 use App\Models\Shop\Offer;
+use App\Models\Shop\PriceListValue;
+use App\Models\Shop\SaleChannel;
 use App\Traits\Model\Basic;
 
 class Offers
@@ -166,4 +168,42 @@ class Offers
     {
         return Offer::query();
     }
+
+    public static function getSaleChannelsForArticle($articleId)
+    {
+        $channels = SaleChannel::query()
+            ->whereHas('price_lists', function ($query) use ($articleId) {
+                $query->whereHas('tariff.offers', function ($subQuery) use ($articleId) {
+                    $subQuery->byArticle($articleId);
+                })->whereHas('price_list_values');
+            })
+            ->orderBy('name')
+            ->get();
+
+        $offers = Offer::query()
+            ->byArticle($articleId)
+            ->with('article')
+            ->get();
+
+        return $channels->map(function ($channel) use ($offers) {
+            $priceValue = null;
+
+            foreach ($offers as $offer) {
+                $priceCandidate = self::getPrice($offer->id, 1, $channel->id);
+
+                if ($priceCandidate && (float) $priceCandidate->price_taxed > 0) {
+                    $priceValue = $priceCandidate;
+                    break;
+                }
+            }
+
+            return [
+                'id' => $channel->id,
+                'name' => $channel->name,
+                'code' => $channel->code,
+                'price_taxed' => $priceValue ? (float) $priceValue->price_taxed : null,
+                'quantity' => $priceValue ? (int) $priceValue->quantity : null,
+            ];
+        })->toArray();
+    }
 }