Finish front-end server modification changes.

Everything is back to the point that it was before this massive code overhaul began. FInal steps before merging this into develop will be some unit tests.

app/Services/Servers/StartupCommandViewService.php

@@ -0,0 +1,55 @@
+<?php
+
+namespace Pterodactyl\Services\Servers;
+
+use Illuminate\Support\Collection;
+use Pterodactyl\Contracts\Repository\ServerRepositoryInterface;
+
+class StartupCommandViewService
+{
+    /**
+     * @var \Pterodactyl\Contracts\Repository\ServerRepositoryInterface
+     */
+    private $repository;
+
+    /**
+     * StartupCommandViewService constructor.
+     *
+     * @param \Pterodactyl\Contracts\Repository\ServerRepositoryInterface $repository
+     */
+    public function __construct(ServerRepositoryInterface $repository)
+    {
+        $this->repository = $repository;
+    }
+
+    /**
+     * Generate a startup command for a server and return all of the user-viewable variables
+     * as well as thier assigned values.
+     *
+     * @param int $server
+     * @return \Illuminate\Support\Collection
+     *
+     * @throws \Pterodactyl\Exceptions\Repository\RecordNotFoundException
+     */
+    public function handle(int $server): Collection
+    {
+        $response = $this->repository->getVariablesWithValues($server, true);
+        $server = $this->repository->getPrimaryAllocation($response->server);
+
+        $find = ['{{SERVER_MEMORY}}', '{{SERVER_IP}}', '{{SERVER_PORT}}'];
+        $replace = [$server->memory, $server->allocation->ip, $server->allocation->port];
+
+        $variables = $server->egg->variables->each(function ($variable) use (&$find, &$replace, $response) {
+            $find[] = '{{' . $variable->env_variable . '}}';
+            $replace[] = $variable->user_viewable ? $response->data[$variable->env_variable] : '[hidden]';
+        })->filter(function ($variable) {
+            return $variable->user_viewable === 1;
+        });
+
+        return collect([
+            'startup' => str_replace($find, $replace, $server->startup),
+            'variables' => $variables,
+            'server_values' => $response->data,
+        ]);
+    }
+}