Add Purchase Order Management to Accounting System

app/Filament/App/Resources/PurchaseOrderResource.php

@@ -0,0 +1,102 @@
+
+
+<?php
+
+namespace App\Filament\App\Resources;
+
+use App\Filament\App\Resources\PurchaseOrderResource\Pages;
+use App\Models\PurchaseOrder;
+use Filament\Forms;
+use Filament\Forms\Form;
+use Filament\Resources\Resource;
+use Filament\Tables;
+use Filament\Tables\Table;
+
+class PurchaseOrderResource extends Resource
+{
+    protected static ?string $model = PurchaseOrder::class;
+
+    protected static ?string $navigationIcon = 'heroicon-o-shopping-cart';
+
+    public static function form(Form $form): Form
+    {
+        return $form
+            ->schema([
+                Forms\Components\Select::make('supplier_id')
+                    ->relationship('supplier', 'supplier_first_name')
+                    ->required(),
+                Forms\Components\TextInput::make('po_number')
+                    ->default(fn () => PurchaseOrder::generatePoNumber())
+                    ->disabled()
+                    ->required(),
+                Forms\Components\DatePicker::make('order_date')
+                    ->required(),
+                Forms\Components\DatePicker::make('expected_delivery_date'),
+                Forms\Components\Select::make('status')
+                    ->options([
+                        'draft' => 'Draft',
+                        'sent' => 'Sent',
+                        'received' => 'Received',
+                        'cancelled' => 'Cancelled',
+                    ])
+                    ->required(),
+                Forms\Components\Repeater::make('items')
+                    ->relationship()
+                    ->schema([
+                        Forms\Components\TextInput::make('description')
+                            ->required(),
+                        Forms\Components\TextInput::make('quantity')
+                            ->numeric()
+                            ->required(),
+                        Forms\Components\TextInput::make('unit_price')
+                            ->numeric()
+                            ->required(),
+                    ])
+                    ->columns(3),
+                Forms\Components\Textarea::make('notes'),
+            ]);
+    }
+
+    public static function table(Table $table): Table
+    {
+        return $table
+            ->columns([
+                Tables\Columns\TextColumn::make('po_number')
+                    ->searchable(),
+                Tables\Columns\TextColumn::make('supplier.supplier_first_name')
+                    ->searchable(),
+                Tables\Columns\TextColumn::make('order_date')
+                    ->date(),
+                Tables\Columns\TextColumn::make('total_amount')
+                    ->money(),
+                Tables\Columns\BadgeColumn::make('status')
+                    ->colors([
+                        'warning' => 'draft',
+                        'primary' => 'sent',
+                        'success' => 'received',
+                        'danger' => 'cancelled',
+                    ]),
+            ])
+            ->filters([
+                Tables\Filters\SelectFilter::make('status'),
+            ])
+            ->actions([
+                Tables\Actions\EditAction::make(),
+                Tables\Actions\DeleteAction::make(),
+            ])
+            ->bulkActions([
+                Tables\Actions\BulkActionGroup::make([
+                    Tables\Actions\DeleteBulkAction::make(),
+                ]),
+            ]);
+    }
+
+    public static function getPages(): array
+    {
+        return [
+            'index' => Pages\ListPurchaseOrders::route('/'),
+            'create' => Pages\CreatePurchaseOrder::route('/create'),
+            'edit' => Pages\EditPurchaseOrder::route('/{record}/edit'),
+        ];
+    }
+}

app/Models/PurchaseOrder.php

@@ -0,0 +1,63 @@
+
+
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class PurchaseOrder extends Model
+{
+    use HasFactory;
+
+    protected $primaryKey = 'purchase_order_id';
+
+    protected $fillable = [
+        'supplier_id',
+        'po_number',
+        'order_date',
+        'expected_delivery_date',
+        'total_amount',
+        'status',
+        'notes'
+    ];
+
+    protected $casts = [
+        'order_date' => 'date',
+        'expected_delivery_date' => 'date',
+        'total_amount' => 'decimal:2',
+    ];
+
+    public function supplier()
+    {
+        return $this->belongsTo(Supplier::class, 'supplier_id');
+    }
+
+    public function items()
+    {
+        return $this->hasMany(PurchaseOrderItem::class, 'purchase_order_id');
+    }
+
+    public function transactions()
+    {
+        return $this->hasMany(Transaction::class, 'purchase_order_id');
+    }
+
+    public static function generatePoNumber()
+    {
+        $prefix = 'PO';
+        $year = date('Y');
+        $lastPo = self::whereYear('created_at', $year)
+            ->orderBy('po_number', 'desc')
+            ->first();
+
+        if (!$lastPo) {
+            $number = 1;
+        } else {
+            $number = (int)substr($lastPo->po_number, -4) + 1;
+        }
+
+        return $prefix . $year . str_pad($number, 4, '0', STR_PAD_LEFT);
+    }
+}

app/Models/PurchaseOrderItem.php

@@ -0,0 +1,33 @@
+
+
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class PurchaseOrderItem extends Model
+{
+    use HasFactory;
+
+    protected $primaryKey = 'item_id';
+
+    protected $fillable = [
+        'purchase_order_id',
+        'description',
+        'quantity',
+        'unit_price',
+        'total_price'
+    ];
+
+    protected $casts = [
+        'unit_price' => 'decimal:2',
+        'total_price' => 'decimal:2',
+    ];
+
+    public function purchaseOrder()
+    {
+        return $this->belongsTo(PurchaseOrder::class, 'purchase_order_id');
+    }
+}

app/Models/Transaction.php

@@ -21,6 +21,7 @@ class Transaction extends Model
         'reconciled',
         'discrepancy_notes',
         'exchange_rate',
+        'purchase_order_id',
     ];
 
     protected $casts = [
@@ -48,6 +49,11 @@ public function categories()
         return $this->belongsToMany(Category::class);
     }
 
+    public function purchaseOrder()
+    {
+        return $this->belongsTo(PurchaseOrder::class, 'purchase_order_id');
+    }
+
     public function getAmountInDefaultCurrency()
     {
         $defaultCurrency = Currency::where('is_default', true)->first();

database/migrations/2024_01_10_000001_create_purchase_orders_table.php

@@ -0,0 +1,41 @@
+
+
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up()
+    {
+        Schema::create('purchase_orders', function (Blueprint $table) {
+            $table->id('purchase_order_id');
+            $table->foreignId('supplier_id')->constrained('suppliers', 'supplier_id');
+            $table->string('po_number')->unique();
+            $table->date('order_date');
+            $table->date('expected_delivery_date')->nullable();
+            $table->decimal('total_amount', 15, 2);
+            $table->string('status')->default('draft');
+            $table->text('notes')->nullable();
+            $table->timestamps();
+        });
+
+        Schema::create('purchase_order_items', function (Blueprint $table) {
+            $table->id('item_id');
+            $table->foreignId('purchase_order_id')->constrained('purchase_orders', 'purchase_order_id')->onDelete('cascade');
+            $table->string('description');
+            $table->integer('quantity');
+            $table->decimal('unit_price', 15, 2);
+            $table->decimal('total_price', 15, 2);
+            $table->timestamps();
+        });
+    }
+
+    public function down()
+    {
+        Schema::dropIfExists('purchase_order_items');
+        Schema::dropIfExists('purchase_orders');
+    }
+};