Add piece_weight calibration: enter Stück + Gramm per delivery, average auto-calculated

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

app/Filament/User/Resources/SpiceResource.php

@@ -7,6 +7,7 @@ use App\Filament\User\Resources\SpiceResource\RelationManagers;
 use App\Models\Spice;
 use Filament\Forms;
 use Filament\Forms\Form;
+use Filament\Forms\Get;
 use Filament\Resources\Resource;
 use Filament\Tables;
 use Filament\Tables\Table;
@@ -35,12 +36,19 @@ class SpiceResource extends Resource
                     ->label('Mengeneinheit')
                     ->native(false)
                     ->searchable()
+                    ->live()
                     ->options([
                         'grams' => '(Kilo-)Gramm',
                         'pieces' => 'Stück',
                         'liter' => 'Liter',
                     ])
                     ->required(),
+                Forms\Components\TextInput::make('piece_weight')
+                    ->label('Ø Stückgewicht (g)')
+                    ->numeric()
+                    ->suffix('g')
+                    ->helperText('Wird automatisch aus Lieferungen errechnet, kann aber auch manuell gesetzt werden.')
+                    ->visible(fn (Get $get) => $get('unit') === 'pieces'),
             ]);
     }
 

app/Filament/User/Resources/SpiceSupplierResource.php

@@ -71,6 +71,10 @@ class SpiceSupplierResource extends Resource
                     ->required()
                     ->rules(['min:0.001'])
                     ->disabled(fn($record) => !is_null($record))
+                    ->label(function (Get $get) {
+                        $unit = \App\Models\Spice::find($get('spice_id'))?->unit;
+                        return $unit === 'pieces' ? 'Anzahl Stück' : 'Liefermenge';
+                    })
                     ->suffix(function (Get $get) {
                         $unit = \App\Models\Spice::find($get('spice_id'))?->unit;
                         return match($unit) {
@@ -90,6 +94,16 @@ class SpiceSupplierResource extends Resource
                         $unit = \App\Models\Spice::find($get('spice_id'))?->unit;
                         return $unit === 'grams' ? (float) $state * 1000 : $state;
                     }),
+
+                TextInput::make('weight_g')
+                    ->label('Gesamtgewicht dieser Lieferung (g)')
+                    ->numeric()
+                    ->suffix('g')
+                    ->helperText('Optional — aktualisiert das Ø Stückgewicht automatisch')
+                    ->disabled(fn($record) => !is_null($record))
+                    ->visible(function (Get $get) {
+                        return \App\Models\Spice::find($get('spice_id'))?->unit === 'pieces';
+                    }),
                     
                 DatePicker::make('supplied_at')
                     ->label('Lieferdatum')

app/Models/Spice.php

@@ -6,7 +6,7 @@ use Illuminate\Database\Eloquent\Model;
 
 class Spice extends Model
 {
-    protected $fillable = ['name', 'quantity', 'unit'];
+    protected $fillable = ['name', 'quantity', 'unit', 'piece_weight'];
 
     public function recipes()
     {
@@ -24,4 +24,17 @@ class Spice extends Model
     {
         $this->update(['quantity' => $this->stockMovements()->sum('amount')]);
     }
+
+    public function recalculatePieceWeight(): void
+    {
+        $result = SpiceSupplier::where('spice_id', $this->id)
+            ->whereNotNull('weight_g')
+            ->where('weight_g', '>', 0)
+            ->selectRaw('SUM(weight_g) as total_grams, SUM(amount) as total_pieces')
+            ->first();
+
+        if ($result && $result->total_pieces > 0) {
+            $this->update(['piece_weight' => round($result->total_grams / $result->total_pieces, 3)]);
+        }
+    }
 }

app/Models/SpiceSupplier.php

@@ -15,6 +15,7 @@ class SpiceSupplier extends Model
         'spice_id',
         'supplier_id',
         'amount',
+        'weight_g',
         'supplied_at',
     ];
 
@@ -39,6 +40,9 @@ class SpiceSupplier extends Model
                 'description' => 'Lieferung' . ($ss->supplier ? ' von ' . $ss->supplier->name : ''),
             ]);
             $ss->spice->recalculateQuantity();
+            if ($ss->weight_g && $ss->amount) {
+                $ss->spice->recalculatePieceWeight();
+            }
         });
 
         static::deleted(function (SpiceSupplier $ss) {
@@ -46,6 +50,9 @@ class SpiceSupplier extends Model
                 ->where('source_id', $ss->id)
                 ->delete();
             $ss->spice->recalculateQuantity();
+            if ($ss->weight_g) {
+                $ss->spice->recalculatePieceWeight();
+            }
         });
     }
 }

database/migrations/2026_09_13_000000_add_piece_weight_to_spices_and_suppliers.php

@@ -0,0 +1,30 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('spices', function (Blueprint $table) {
+            $table->decimal('piece_weight', 10, 3)->nullable()->after('unit');
+        });
+
+        Schema::table('spices_suppliers', function (Blueprint $table) {
+            $table->decimal('weight_g', 10, 3)->nullable()->after('amount');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('spices', function (Blueprint $table) {
+            $table->dropColumn('piece_weight');
+        });
+
+        Schema::table('spices_suppliers', function (Blueprint $table) {
+            $table->dropColumn('weight_g');
+        });
+    }
+};