Model fixing, moving things around to improve code.

Adds unique UUID generator, moves functions into repositories for
adding servers and users, cleans up code, adding more comments.

app/Services/UuidService.php

@@ -0,0 +1,101 @@
+<?php
+
+namespace Pterodactyl\Services;
+
+use DB;
+use Uuid;
+
+class UuidService
+{
+
+    /**
+     * @var string
+     */
+    protected $table = 'users';
+
+    /**
+     * @var string
+     */
+    protected $field = 'uuid';
+
+    /**
+     * Constructor
+     */
+    public function __construct()
+    {
+        //
+    }
+
+    /**
+     * Set the table that we need to be checking in the database.
+     *
+     * @param  string $table
+     * @return void
+     */
+    public function table($table)
+    {
+        $this->table = $table;
+        return $this;
+    }
+
+    /**
+     * Set the field in the given table that we want to check for a unique UUID.
+     *
+     * @param  string $field
+     * @return void
+     */
+    public function field($field)
+    {
+        $this->field = $field;
+        return $this;
+    }
+
+    /**
+     * Generate a unique UUID validating against specified table and column.
+     * Defaults to `users.uuid`
+     *
+     * @param  integer $type The type of UUID to generate.
+     * @return string
+     */
+    public function generate($type = 4)
+    {
+
+        $return = false;
+        do {
+
+            $uuid = LaravelUUID::generate($type);
+            if (!DB::table($this->table)->where($this->field, $uuid)->exists()) {
+                $return = $uuid;
+            }
+
+        } while (!$return);
+
+        return $return;
+
+    }
+
+    /**
+     * Generates a ShortUUID code which is 8 characters long and is used for identifying servers in the system.
+     *
+     * @param string $table
+     * @param string $field
+     * @return string
+     */
+    public function generateShort($table = 'servers', $field = 'uuidShort')
+    {
+
+        $return = false;
+        do {
+
+            $short = substr(Uuid::generate(4), 0, 8);
+            if (!DB::table($table)->where($field, $short)->exists()) {
+                $return = $short;
+            }
+
+        } while (!$return);
+
+        return $return;
+
+    }
+
+}