feat: Introduce feed purchase editing and refactor cart handling to be associated with specific records.

app/Filament/Resources/Manage/FeedPurchases/FeedPurchaseResource.php

@@ -3,6 +3,7 @@
 namespace App\Filament\Resources\Manage\FeedPurchases;
 
 use App\Filament\Resources\Manage\FeedPurchases\Pages\CreateFeedPurchase;
+use App\Filament\Resources\Manage\FeedPurchases\Pages\EditFeedPurchase;
 use App\Filament\Resources\Manage\FeedPurchases\Pages\ListFeedPurchases;
 use App\Filament\Resources\Manage\FeedPurchases\Schemas\FeedPurchaseForm;
 use App\Filament\Resources\Manage\FeedPurchases\Tables\FeedPurchasesTable;
@@ -45,6 +46,7 @@ public static function getPages(): array
         return [
             'index' => ListFeedPurchases::route('/'),
             'create' => CreateFeedPurchase::route('/create'),
+            'edit' => EditFeedPurchase::route('/{record}/edit'),
         ];
     }
 }

app/Filament/Resources/Manage/FeedPurchases/Pages/CreateFeedPurchase.php

@@ -19,6 +19,13 @@ class CreateFeedPurchase extends CreateRecord
 
     protected static ?string $title = 'Tambah Belanja Pakan';
 
+    public function mount(): void
+    {
+        parent::mount();
+
+        $this->loadCartFromDb();
+    }
+
     #[On('cart-updated')]
     public function onCartUpdated(): void
     {

app/Filament/Resources/Manage/FeedPurchases/Pages/EditFeedPurchase.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace App\Filament\Resources\Manage\FeedPurchases\Pages;
+
+use App\Filament\Actions\BackAction;
+use App\Filament\Resources\Manage\FeedPurchases\FeedPurchaseResource;
+use App\Filament\Resources\Manage\FeedPurchases\Traits\HasCart;
+use App\Models\FeedPurchaseItem;
+use Filament\Resources\Pages\EditRecord;
+use Livewire\Attributes\On;
+
+class EditFeedPurchase extends EditRecord
+{
+    use HasCart;
+
+    protected static string $resource = FeedPurchaseResource::class;
+
+    protected ?string $heading = 'Ubah Belanja Pakan';
+
+    protected static ?string $title = 'Ubah Belanja Pakan';
+
+    public function mount(int|string $record): void
+    {
+        parent::mount($record);
+
+        $this->loadCartFromDb();
+    }
+
+    #[On('cart-updated')]
+    public function onCartUpdated(): void
+    {
+        $this->syncTotalPriceFromCart();
+    }
+
+    protected function syncTotalPriceFromCart(): void
+    {
+        $total = (int) FeedPurchaseItem::where('feed_purchase_id', $this->record->id)->sum('subtotal');
+
+        $this->form->fill([
+            ...$this->form->getState(),
+            'total_price' => $total,
+        ]);
+    }
+
+    protected function getHeaderActions(): array
+    {
+        return [
+            BackAction::make()
+                ->url(ListFeedPurchases::getUrl()),
+        ];
+    }
+
+    protected function getRedirectUrl(): string
+    {
+        return $this->getResource()::getUrl('index');
+    }
+
+    protected function mutateFormDataBeforeSave(array $data): array
+    {
+        $total = FeedPurchaseItem::where('feed_purchase_id', $this->record->id)->sum('subtotal');
+        $data['total_price'] = $total;
+
+        return $data;
+    }
+}

app/Filament/Resources/Manage/FeedPurchases/Schemas/FeedPurchaseForm.php

@@ -32,17 +32,6 @@ function () {
             }
         );
 
-        $cartItems = FeedPurchaseItem::with('feed')
-            ->whereNull('feed_purchase_id')
-            ->latest()
-            ->get()
-            ->map(function ($cartItem) {
-                $cartItem->subtotal = $cartItem->unit_price * $cartItem->quantity;
-                $cartItem->feedImage = $cartItem->feed?->getFirstMediaUrl('feeds');
-
-                return $cartItem;
-            });
-
         return $schema
             ->components([
                 Section::make('Informasi Belanja')
@@ -73,7 +62,7 @@ function () {
                                     ->prefix('Rp')
                                     ->required()
                                     ->dehydrateStateUsing(fn ($state) => (int) str()->replace(',', '', (string) ($state ?? 0)))
-                                    ->default(fn () => (int) FeedPurchaseItem::whereNull('feed_purchase_id')->sum('subtotal')),
+                                    ->default(fn ($record) => (int) FeedPurchaseItem::where('feed_purchase_id', $record?->id)->sum('subtotal')),
 
                                 Textarea::make('notes')
                                     ->label('Catatan')
@@ -103,8 +92,17 @@ function () {
                         Section::make('Keranjang')
                             ->schema([
                                 View::make('filament.resources.manage.feed-purchases.cart')
-                                    ->viewData([
+                                    ->viewData(fn ($record) => [
-                                        'cartItems' => $cartItems,
+                                        'cartItems' => FeedPurchaseItem::with('feed')
+                                            ->where('feed_purchase_id', $record?->id)
+                                            ->latest()
+                                            ->get()
+                                            ->map(function ($cartItem) {
+                                                $cartItem->subtotal = $cartItem->unit_price * $cartItem->quantity;
+                                                $cartItem->feedImage = $cartItem->feed?->getFirstMediaUrl('feeds');
+
+                                                return $cartItem;
+                                            }),
                                     ]),
                             ])
                             ->columnSpan([

app/Filament/Resources/Manage/FeedPurchases/Tables/FeedPurchasesTable.php

@@ -3,6 +3,7 @@
 namespace App\Filament\Resources\Manage\FeedPurchases\Tables;
 
 use App\Filament\Actions\Cheerful\DeleteAction;
+use App\Filament\Actions\Cheerful\EditAction;
 use App\Filament\Actions\Cheerful\ForceDeleteAction;
 use App\Filament\Actions\Cheerful\RestoreAction;
 use App\Filament\Actions\DefaultBulkActions;
@@ -85,6 +86,9 @@ public static function configure(Table $table): Table
                     ->native(false),
             ])
             ->recordActions([
+                EditAction::make()
+                    ->label('Ubah'),
+
                 DeleteAction::make(),
 
                 ForceDeleteAction::make(),

app/Filament/Resources/Manage/FeedPurchases/Traits/HasCart.php

@@ -11,7 +11,9 @@ trait HasCart
 
     public function loadCartFromDb(): void
     {
-        $this->cart = FeedPurchaseItem::whereNull('feed_purchase_id')
+        $id = isset($this->record) ? $this->record->id : null;
+
+        $this->cart = FeedPurchaseItem::where('feed_purchase_id', $id)
             ->get()
             ->pluck('quantity', 'feed_id')
             ->map(fn ($qty) => ['qty' => (int) $qty])
@@ -25,7 +27,9 @@ public function addFeed(int $feedId): void
             return;
         }
 
-        $item = FeedPurchaseItem::whereNull('feed_purchase_id')
+        $id = isset($this->record) ? $this->record->id : null;
+
+        $item = FeedPurchaseItem::where('feed_purchase_id', $id)
             ->where('feed_id', $feedId)
             ->first();
 
@@ -34,7 +38,7 @@ public function addFeed(int $feedId): void
             $item->update(['subtotal' => $item->quantity * $item->unit_price]);
         } else {
             FeedPurchaseItem::create([
-                'feed_purchase_id' => null,
+                'feed_purchase_id' => $id,
                 'feed_id' => $feedId,
                 'quantity' => 1,
                 'unit_price' => $feed->price,
@@ -42,13 +46,20 @@ public function addFeed(int $feedId): void
             ]);
         }
 
+        // Update stock if editing
+        if ($id) {
+            $feed->increment('stock', 1);
+        }
+
         $this->loadCartFromDb();
         $this->dispatch('cart-updated');
     }
 
     public function decreaseQty(int $feedId): void
     {
-        $item = FeedPurchaseItem::whereNull('feed_purchase_id')
+        $id = isset($this->record) ? $this->record->id : null;
+
+        $item = FeedPurchaseItem::where('feed_purchase_id', $id)
             ->where('feed_id', $feedId)
             ->first();
 
@@ -60,6 +71,11 @@ public function decreaseQty(int $feedId): void
                 $item->delete();
             }
 
+            // Update stock if editing
+            if ($id) {
+                $item->feed?->decrement('stock', 1);
+            }
+
             $this->loadCartFromDb();
             $this->dispatch('cart-updated');
         }
@@ -67,7 +83,18 @@ public function decreaseQty(int $feedId): void
 
     public function removeCartItem(int $itemId): void
     {
-        FeedPurchaseItem::where('id', $itemId)->whereNull('feed_purchase_id')->delete();
+        $id = isset($this->record) ? $this->record->id : null;
+        $item = FeedPurchaseItem::find($itemId);
+
+        if ($item && $item->feed_purchase_id == $id) {
+            // Revert stock if editing
+            if ($id) {
+                $item->feed?->decrement('stock', $item->quantity);
+            }
+
+            $item->delete();
+        }
+
         $this->loadCartFromDb();
         $this->dispatch('cart-updated');
     }