Support modifying startup variables for servers

app/Http/Controllers/Api/Client/Servers/StartupController.php

@@ -0,0 +1,81 @@
+<?php
+
+namespace Pterodactyl\Http\Controllers\Api\Client\Servers;
+
+use Carbon\CarbonImmutable;
+use Pterodactyl\Models\Server;
+use Illuminate\Http\JsonResponse;
+use Pterodactyl\Services\Servers\VariableValidatorService;
+use Pterodactyl\Repositories\Eloquent\ServerVariableRepository;
+use Pterodactyl\Transformers\Api\Client\EggVariableTransformer;
+use Pterodactyl\Http\Controllers\Api\Client\ClientApiController;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
+use Pterodactyl\Http\Requests\Api\Client\Servers\Startup\UpdateStartupVariableRequest;
+
+class StartupController extends ClientApiController
+{
+    /**
+     * @var \Pterodactyl\Services\Servers\VariableValidatorService
+     */
+    private $service;
+
+    /**
+     * @var \Pterodactyl\Repositories\Eloquent\ServerVariableRepository
+     */
+    private $repository;
+
+    /**
+     * StartupController constructor.
+     *
+     * @param \Pterodactyl\Services\Servers\VariableValidatorService $service
+     * @param \Pterodactyl\Repositories\Eloquent\ServerVariableRepository $repository
+     */
+    public function __construct(VariableValidatorService $service, ServerVariableRepository $repository)
+    {
+        parent::__construct();
+
+        $this->service = $service;
+        $this->repository = $repository;
+    }
+
+    /**
+     * Updates a single variable for a server.
+     *
+     * @param \Pterodactyl\Http\Requests\Api\Client\Servers\Startup\UpdateStartupVariableRequest $request
+     * @param \Pterodactyl\Models\Server $server
+     * @return array
+     *
+     * @throws \Illuminate\Validation\ValidationException
+     * @throws \Pterodactyl\Exceptions\Model\DataValidationException
+     * @throws \Pterodactyl\Exceptions\Repository\RecordNotFoundException
+     */
+    public function update(UpdateStartupVariableRequest $request, Server $server)
+    {
+        /** @var \Pterodactyl\Models\EggVariable $variable */
+        $variable = $server->variables()->where('env_variable', $request->input('key'))->first();
+
+        if (is_null($variable) || !$variable->user_viewable || !$variable->user_editable) {
+            throw new BadRequestHttpException(
+                "The environment variable you are trying to edit [\"{$request->input('key')}\"] does not exist."
+            );
+        }
+
+        // Revalidate the variable value using the egg variable specific validation rules for it.
+        $this->validate($request, ['value' => $variable->rules]);
+
+        $this->repository->updateOrCreate([
+            'server_id' => $server->id,
+            'variable_id' => $variable->id,
+        ], [
+            'variable_value' => $request->input('value'),
+        ]);
+
+        $variable = $variable->refresh();
+        $variable->server_value = $request->input('value');
+
+        return $this->fractal->item($variable)
+            ->transformWith($this->getTransformer(EggVariableTransformer::class))
+            ->toArray();
+    }
+}

app/Http/Requests/Api/Client/Servers/Startup/UpdateStartupVariableRequest.php

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+<?php
+
+namespace Pterodactyl\Http\Requests\Api\Client\Servers\Startup;
+
+use Pterodactyl\Models\Permission;
+use Pterodactyl\Http\Requests\Api\Client\ClientApiRequest;
+
+class UpdateStartupVariableRequest extends ClientApiRequest
+{
+    /**
+     * @return string
+     */
+    public function permission()
+    {
+        return Permission::ACTION_STARTUP_UPDATE;
+    }
+
+    /**
+     * The actual validation of the variable's value will happen inside the controller.
+     *
+     * @return array|string[]
+     */
+    public function rules(): array
+    {
+        return [
+            'key' => 'required|string',
+            'value' => 'present|string',
+        ];
+    }
+}