create stock and stock logs

database/migrations/2025_06_10_135321_create_stocks_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateStocksTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('stocks', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('product_id')->constrained('products')->onDelete('cascade');
+            $table->foreignId('dealer_id')->constrained('dealers')->onDelete('cascade');
+            $table->decimal('quantity', 10, 2)->default(0);
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('stocks');
+    }
+}

database/migrations/2025_06_10_135341_create_stock_logs_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Support\Facades\DB;
+
+class CreateStockLogsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('stock_logs', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('stock_id')->constrained('stocks')->onDelete('cascade');
+            $table->string('source_type'); // 'opname' atau 'mutation'
+            $table->unsignedBigInteger('source_id'); // ID dari opname atau mutation
+            $table->decimal('previous_quantity', 10, 2);
+            $table->decimal('new_quantity', 10, 2);
+            $table->decimal('quantity_change', 10, 2); // bisa positif atau negatif
+            $table->enum('change_type', ['increase', 'decrease', 'adjustment', 'no_change'])->default('no_change');
+            $table->string('description')->nullable();
+            $table->foreignId('user_id')->constrained('users');
+            $table->timestamps();
+
+            // Index untuk pencarian berdasarkan source
+            $table->index(['source_type', 'source_id']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('stock_logs');
+    }
+}

database/migrations/2025_06_10_135417_add_approval_columns_to_opnames_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class AddApprovalColumnsToOpnamesTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('opnames', function (Blueprint $table) {
+            $table->enum('status', ['draft', 'pending', 'approved', 'rejected'])->default('draft');
+            $table->foreignId('approved_by')->nullable()->constrained('users');
+            $table->timestamp('approved_at')->nullable();
+            $table->text('rejection_note')->nullable();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('opnames', function (Blueprint $table) {
+            $table->dropForeign(['approved_by']);
+            $table->dropColumn(['status', 'approved_by', 'approved_at', 'rejection_note']);
+        });
+    }
+}

database/migrations/2025_06_10_140540_change_stock_columns_to_decimal_in_opname_details.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class ChangeStockColumnsToDecimalInOpnameDetails extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('opname_details', function (Blueprint $table) {
+                        // Mengubah kolom system_stock dari integer ke decimal(10,2)
+            $table->decimal('system_stock', 10, 2)->change();
+            
+            // Mengubah kolom physical_stock dari integer ke decimal(10,2)
+            $table->decimal('physical_stock', 10, 2)->change();
+            
+            // Mengubah kolom difference dari integer ke decimal(10,2)
+            $table->decimal('difference', 10, 2)->default(0)->change();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('opname_details', function (Blueprint $table) {
+            $table->integer('system_stock')->change();
+            $table->integer('physical_stock')->change();
+            $table->integer('difference')->default(0)->change();
+        });
+    }
+}