Add recipe versioning: auto-bump on change, history sub-page

Each time the recipe name or spices are changed on the product edit
page, a new version is created instead of overwriting the current one.
Unchanged saves are skipped. A 'Rezept-Versionen' button opens a
sub-page (/produkt/{id}/rezept-versionen) listing all versions with
their spices and timestamps; the active version is highlighted in green.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Filament/User/Resources/ProductResource.php

@@ -196,6 +196,7 @@ class ProductResource extends Resource {
             'index'          => Pages\ListProducts::route('/'),
             'create'         => Pages\CreateProduct::route('/create'),
             'edit'           => Pages\EditProduct::route('/{record}/edit'),
+            'recipe-history' => Pages\RecipeHistory::route('/{record}/rezept-versionen'),
         ];
     }
 

app/Filament/User/Resources/ProductResource/Pages/EditProduct.php

@@ -14,16 +14,23 @@ class EditProduct extends EditRecord
     protected function getHeaderActions(): array
     {
         return [
+            Actions\Action::make('rezept-versionen')
+                ->label('Rezept-Versionen')
+                ->icon('heroicon-o-clock')
+                ->color('gray')
+                ->url(fn () => ProductResource::getUrl('recipe-history', ['record' => $this->record])),
             Actions\DeleteAction::make(),
         ];
     }
 
-    protected function afterSave(): void {
+    protected function afterSave(): void
+    {
         $this->syncSizes();
         $this->syncRecipe();
     }
 
-    protected function syncSizes(): void {
+    protected function syncSizes(): void
+    {
         $product = $this->record;
 
         $sizes = collect($this->data['sizes'] ?? [])
@@ -52,22 +59,41 @@ class EditProduct extends EditRecord
             return;
         }
 
-        $pivotData = collect($spices)->mapWithKeys(fn ($s) => [
+        $newPivot = collect($spices)->mapWithKeys(fn ($s) => [
-            $s['spice_id'] => ['amount_in_percent' => $s['amount_in_percent']],
+            (int) $s['spice_id'] => (float) $s['amount_in_percent'],
         ])->toArray();
 
-        if ($product->recipe) {
+        $current = $product->recipe;
-            $product->recipe->update(['name' => $name]);
+
-            $product->recipe->spices()->sync($pivotData);
+        if ($current) {
-        } else {
+            $current->load('spices');
+
+            $existingPivot = $current->spices->mapWithKeys(fn ($s) => [
+                $s->id => (float) $s->pivot->amount_in_percent,
+            ])->toArray();
+
+            $nameChanged   = $current->name !== $name;
+            $spicesChanged = $existingPivot != $newPivot;
+
+            if (! $nameChanged && ! $spicesChanged) {
+                return;
+            }
+        }
+
         $nextVersion = Recipe::where('product_id', $product->id)->max('version') + 1;
+
         $recipe = Recipe::create([
             'name'       => $name,
             'product_id' => $product->id,
             'version'    => $nextVersion,
         ]);
-            $recipe->spices()->sync($pivotData);
+
+        $recipe->spices()->sync(
+            collect($newPivot)->mapWithKeys(fn ($pct, $id) => [
+                $id => ['amount_in_percent' => $pct],
+            ])->toArray()
+        );
+
         $product->update(['recipes_id' => $recipe->id]);
     }
 }
-}

app/Filament/User/Resources/ProductResource/Pages/RecipeHistory.php

@@ -0,0 +1,77 @@
+<?php
+
+namespace App\Filament\User\Resources\ProductResource\Pages;
+
+use App\Filament\User\Resources\ProductResource;
+use App\Models\Product;
+use App\Models\Recipe;
+use Filament\Actions\Action;
+use Filament\Resources\Pages\Page;
+use Filament\Tables\Columns\IconColumn;
+use Filament\Tables\Columns\TextColumn;
+use Filament\Tables\Concerns\InteractsWithTable;
+use Filament\Tables\Contracts\HasTable;
+use Filament\Tables\Table;
+
+class RecipeHistory extends Page implements HasTable
+{
+    use InteractsWithTable;
+
+    protected static string $resource = ProductResource::class;
+    protected static string $view = 'filament.user.resources.product-resource.pages.recipe-history';
+
+    public Product $record;
+
+    public function mount(int|string $record): void
+    {
+        $this->record = Product::with('recipe')->findOrFail($record);
+    }
+
+    public function getTitle(): string
+    {
+        return 'Rezept-Versionen · ' . $this->record->title;
+    }
+
+    protected function getHeaderActions(): array
+    {
+        return [
+            Action::make('back')
+                ->label('Zurück zum Produkt')
+                ->icon('heroicon-o-arrow-left')
+                ->color('gray')
+                ->url(ProductResource::getUrl('edit', ['record' => $this->record])),
+        ];
+    }
+
+    public function table(Table $table): Table
+    {
+        $currentRecipeId = $this->record->recipes_id;
+
+        return $table
+            ->query(
+                Recipe::query()
+                    ->where('product_id', $this->record->id)
+                    ->with('spices')
+                    ->orderByDesc('version')
+            )
+            ->columns([
+                TextColumn::make('version')
+                    ->label('Version')
+                    ->formatStateUsing(fn ($state) => 'v' . $state)
+                    ->badge()
+                    ->color(fn (Recipe $recipe) => $recipe->id === $currentRecipeId ? 'success' : 'gray'),
+                TextColumn::make('name')
+                    ->label('Name'),
+                TextColumn::make('spices_summary')
+                    ->label('Zutaten')
+                    ->state(fn (Recipe $recipe) =>
+                        $recipe->spices->map(fn ($s) => $s->name . ' ' . $s->pivot->amount_in_percent . '%')->implode(' · ')
+                    ),
+                TextColumn::make('created_at')
+                    ->label('Erstellt am')
+                    ->dateTime('d.m.Y H:i')
+                    ->sortable(),
+            ])
+            ->paginated(false);
+    }
+}

resources/views/filament/user/resources/product-resource/pages/recipe-history.blade.php

@@ -0,0 +1,3 @@
+<x-filament-panels::page>
+    {{ $this->table }}
+</x-filament-panels::page>