implementation of user limits and refactoring

database/migrations/2019_08_15_171328_create_folders_table.php

@@ -0,0 +1,45 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class CreateFoldersTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('folders', function (Blueprint $table) {
+            $table->uuid('id')->primary()->index();
+            $table->uuid('user_id')->index();
+            $table->uuid('parent_id')->nullable();
+            $table->text('name');
+            $table->string('color')->nullable();
+            $table->longText('emoji')->nullable();
+
+            $table->boolean('team_folder')->default(0);
+
+            $table->enum('author', ['user', 'member', 'visitor'])->default('user');
+
+            $table->softDeletes();
+            $table->timestamps();
+
+            $table->charset = 'utf8mb4';
+            $table->collation = 'utf8mb4_unicode_ci';
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('folders');
+    }
+}