Pass at removing extraneous permissions table and using native MySQL JSON

database/migrations/2020_03_22_163911_merge_permissions_table_into_subusers.php

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+<?php
+
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class MergePermissionsTableIntoSubusers extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('subusers', function (Blueprint $table) {
+            $table->json('permissions')->nullable()->after('server_id');
+        });
+
+        DB::statement('
+            UPDATE subusers as s
+                LEFT JOIN (
+                    SELECT subuser_id, JSON_ARRAYAGG(permission) as permissions
+                    FROM permissions
+                    GROUP BY subuser_id
+                ) as p ON p.subuser_id = s.id
+                SET s.permissions = p.permissions
+        ');
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        foreach (DB::select('SELECT id, permissions FROM subusers') as $datum) {
+            $values = [];
+            foreach(json_decode($datum->permissions, true) as $permission) {
+                $values[] = $datum->id;
+                $values[] = $permission;
+            }
+
+            if (!empty($values)) {
+                $string = 'VALUES ' . implode(', ', array_fill(0, count($values) / 2, '(?, ?)'));
+
+                DB::insert('INSERT INTO permissions(`subuser_id`, `permission`) ' . $string, $values);
+            }
+        }
+
+        Schema::table('subusers', function (Blueprint $table) {
+            $table->dropColumn('permissions');
+        });
+    }
+}

database/migrations/2020_03_22_164814_drop_permissions_table.php

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+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class DropPermissionsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::dropIfExists('permissions');
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::create('permissions', function (Blueprint $table) {
+            $table->increments('id');
+            $table->unsignedInteger('subuser_id');
+            $table->string('permission');
+
+            $table->foreign('subuser_id')->references('id')->on('subusers')->onDelete('cascade');
+        });
+    }
+}