Add database migrations for forum functionality

Created migrations for communities, posts, comments, votes, and user karma tracking.

database/migrations/2024_01_01_000003_add_karma_to_users_table.php

@@ -0,0 +1,22 @@
+<?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('users', function (Blueprint $table) {
+            $table->integer('karma')->default(0)->after('email');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('users', function (Blueprint $table) {
+            $table->dropColumn('karma');
+        });
+    }
+};

database/migrations/2024_01_01_000004_create_communities_table.php

@@ -0,0 +1,25 @@
+<?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::create('communities', function (Blueprint $table) {
+            $table->id();
+            $table->string('name')->unique();
+            $table->string('slug')->unique();
+            $table->text('description')->nullable();
+            $table->foreignId('created_by')->constrained('users')->onDelete('cascade');
+            $table->timestamps();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('communities');
+    }
+};

database/migrations/2024_01_01_000005_create_posts_table.php

@@ -0,0 +1,31 @@
+<?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::create('posts', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('community_id')->constrained()->onDelete('cascade');
+            $table->foreignId('user_id')->constrained()->onDelete('cascade');
+            $table->string('title');
+            $table->text('content')->nullable();
+            $table->string('url')->nullable();
+            $table->enum('type', ['text', 'link', 'image'])->default('text');
+            $table->integer('votes')->default(0);
+            $table->timestamps();
+
+            $table->index(['community_id', 'created_at']);
+            $table->index(['user_id', 'created_at']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('posts');
+    }
+};

database/migrations/2024_01_01_000006_create_comments_table.php

@@ -0,0 +1,29 @@
+<?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::create('comments', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('post_id')->constrained()->onDelete('cascade');
+            $table->foreignId('user_id')->constrained()->onDelete('cascade');
+            $table->foreignId('parent_id')->nullable()->constrained('comments')->onDelete('cascade');
+            $table->text('content');
+            $table->integer('votes')->default(0);
+            $table->timestamps();
+
+            $table->index(['post_id', 'created_at']);
+            $table->index(['parent_id', 'created_at']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('comments');
+    }
+};

database/migrations/2024_01_01_000007_create_votes_table.php

@@ -0,0 +1,26 @@
+<?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::create('votes', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('user_id')->constrained()->onDelete('cascade');
+            $table->morphs('voteable');
+            $table->tinyInteger('vote');
+            $table->timestamps();
+
+            $table->unique(['user_id', 'voteable_id', 'voteable_type']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('votes');
+    }
+};

database/migrations/2024_01_01_000008_create_community_user_table.php

@@ -0,0 +1,25 @@
+<?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::create('community_user', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('community_id')->constrained()->onDelete('cascade');
+            $table->foreignId('user_id')->constrained()->onDelete('cascade');
+            $table->timestamps();
+
+            $table->unique(['community_id', 'user_id']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('community_user');
+    }
+};