Support updating docker image for a server from the frontend

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

@@ -2,13 +2,16 @@
 
 namespace Pterodactyl\Http\Controllers\Api\Client\Servers;
 
+use Illuminate\Http\Request;
 use Illuminate\Http\Response;
 use Pterodactyl\Models\Server;
 use Illuminate\Http\JsonResponse;
 use Pterodactyl\Repositories\Eloquent\ServerRepository;
 use Pterodactyl\Services\Servers\ReinstallServerService;
 use Pterodactyl\Http\Controllers\Api\Client\ClientApiController;
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
 use Pterodactyl\Http\Requests\Api\Client\Servers\Settings\RenameServerRequest;
+use Pterodactyl\Http\Requests\Api\Client\Servers\Settings\SetDockerImageRequest;
 use Pterodactyl\Http\Requests\Api\Client\Servers\Settings\ReinstallServerRequest;
 
 class SettingsController extends ClientApiController
@@ -73,4 +76,26 @@ class SettingsController extends ClientApiController
 
         return new JsonResponse([], Response::HTTP_ACCEPTED);
     }
+
+    /**
+     * Changes the Docker image in use by the server.
+     *
+     * @param \Pterodactyl\Http\Requests\Api\Client\Servers\Settings\SetDockerImageRequest $request
+     * @param \Pterodactyl\Models\Server $server
+     * @return \Illuminate\Http\JsonResponse
+     *
+     * @throws \Throwable
+     */
+    public function dockerImage(SetDockerImageRequest $request, Server $server)
+    {
+        if (!in_array($server->image, $server->egg->docker_images)) {
+            throw new BadRequestHttpException(
+                'This server\'s Docker image has been manually set by an administrator and cannot be updated.'
+            );
+        }
+
+        $server->forceFill(['image' => $request->input('docker_image')])->saveOrFail();
+
+        return new JsonResponse([], Response::HTTP_NO_CONTENT);
+    }
 }

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

@@ -62,6 +62,7 @@ class StartupController extends ClientApiController
             ->transformWith($this->getTransformer(EggVariableTransformer::class))
             ->addMeta([
                 'startup_command' => $startup,
+                'docker_images' => $server->egg->docker_images,
                 'raw_startup_command' => $server->startup,
             ])
             ->toArray();

app/Http/Requests/Api/Client/Servers/Settings/SetDockerImageRequest.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace Pterodactyl\Http\Requests\Api\Client\Servers\Settings;
+
+use Webmozart\Assert\Assert;
+use Pterodactyl\Models\Server;
+use Illuminate\Validation\Rule;
+use Pterodactyl\Models\Permission;
+use Pterodactyl\Contracts\Http\ClientPermissionsRequest;
+use Pterodactyl\Http\Requests\Api\Client\ClientApiRequest;
+
+class SetDockerImageRequest extends ClientApiRequest implements ClientPermissionsRequest
+{
+    /**
+     * @return string
+     */
+    public function permission(): string
+    {
+        return Permission::ACTION_STARTUP_DOCKER_IMAGE;
+    }
+
+    /**
+     * @return array[]
+     */
+    public function rules(): array
+    {
+        /** @var \Pterodactyl\Models\Server $server */
+        $server = $this->route()->parameter('server');
+
+        Assert::isInstanceOf($server, Server::class);
+
+        return [
+            'docker_image' => ['required', 'string', Rule::in($server->egg->docker_images)],
+        ];
+    }
+}

app/Models/Permission.php

@@ -58,6 +58,7 @@ class Permission extends Model
 
     const ACTION_STARTUP_READ = 'startup.read';
     const ACTION_STARTUP_UPDATE = 'startup.update';
+    const ACTION_STARTUP_DOCKER_IMAGE = 'startup.docker-image';
 
     const ACTION_SETTINGS_RENAME = 'settings.rename';
     const ACTION_SETTINGS_REINSTALL = 'settings.reinstall';
@@ -176,6 +177,7 @@ class Permission extends Model
             'keys' => [
                 'read' => 'Allows a user to view the startup variables for a server.',
                 'update' => 'Allows a user to modify the startup variables for the server.',
+                'docker-image' => 'Allows a user to modify the Docker image used when running the server.',
             ],
         ],
 

app/Transformers/Api/Client/ServerTransformer.php

@@ -63,6 +63,7 @@ class ServerTransformer extends BaseClientTransformer
                 'cpu' => $server->cpu,
             ],
             'invocation' => $service->handle($server, ! $this->getUser()->can(Permission::ACTION_STARTUP_READ, $server)),
+            'docker_image' => $server->image,
             'egg_features' => $server->egg->inherit_features,
             'feature_limits' => [
                 'databases' => $server->database_limit,

resources/scripts/api/server/getServer.ts

@@ -22,6 +22,7 @@ export interface Server {
         port: number;
     };
     invocation: string;
+    dockerImage: string;
     description: string;
     limits: {
         memory: number;
@@ -50,6 +51,7 @@ export const rawDataToServerObject = ({ attributes: data }: FractalResponseData)
     name: data.name,
     node: data.node,
     invocation: data.invocation,
+    dockerImage: data.docker_image,
     sftpDetails: {
         ip: data.sftp_details.ip,
         port: data.sftp_details.port,

resources/scripts/api/server/setSelectedDockerImage.ts

@@ -0,0 +1,5 @@
+import http from '@/api/http';
+
+export default async (uuid: string, image: string): Promise<void> => {
+    await http.put(`/api/client/servers/${uuid}/settings/docker-image`, { docker_image: image });
+};

resources/scripts/api/swr/getServerStartup.ts

@@ -6,6 +6,7 @@ import { ServerEggVariable } from '@/api/server/types';
 interface Response {
     invocation: string;
     variables: ServerEggVariable[];
+    dockerImages: string[];
 }
 
 export default (uuid: string, initialData?: Response) => useSWR([ uuid, '/startup' ], async (): Promise<Response> => {
@@ -13,5 +14,5 @@ export default (uuid: string, initialData?: Response) => useSWR([ uuid, '/startu
 
     const variables = ((data as FractalResponseList).data || []).map(rawDataToServerEggVariable);
 
-    return { invocation: data.meta.startup_command, variables };
+    return { invocation: data.meta.startup_command, variables, dockerImages: data.meta.docker_images || [] };
 }, { initialData, errorRetryCount: 3 });

resources/scripts/components/elements/InputSpinner.tsx

@@ -2,16 +2,28 @@ import React from 'react';
 import Spinner from '@/components/elements/Spinner';
 import Fade from '@/components/elements/Fade';
 import tw from 'twin.macro';
+import styled, { css } from 'styled-components/macro';
+import Select from '@/components/elements/Select';
+
+const Container = styled.div<{ visible?: boolean }>`
+    ${tw`relative`};
+    
+    ${props => props.visible && css`
+        & ${Select} {
+            background-image: none;
+        }
+    `};
+`;
 
 const InputSpinner = ({ visible, children }: { visible: boolean, children: React.ReactNode }) => (
-    <div css={tw`relative`}>
+    <Container visible={visible}>
         <Fade appear unmountOnExit in={visible} timeout={150}>
             <div css={tw`absolute right-0 h-full flex items-center justify-end pr-3`}>
                 <Spinner size={'small'}/>
             </div>
         </Fade>
         {children}
-    </div>
+    </Container>
 );
 
 export default InputSpinner;

resources/scripts/components/server/startup/StartupContainer.tsx

@@ -1,4 +1,4 @@
-import React, { useEffect } from 'react';
+import React, { useCallback, useEffect, useState } from 'react';
 import TitledGreyBox from '@/components/elements/TitledGreyBox';
 import tw from 'twin.macro';
 import VariableBox from '@/components/server/startup/VariableBox';
@@ -9,15 +9,32 @@ import ServerError from '@/components/screens/ServerError';
 import { httpErrorToHuman } from '@/api/http';
 import { ServerContext } from '@/state/server';
 import { useDeepCompareEffect } from '@/plugins/useDeepCompareEffect';
+import Select from '@/components/elements/Select';
+import isEqual from 'react-fast-compare';
+import Input from '@/components/elements/Input';
+import setSelectedDockerImage from '@/api/server/setSelectedDockerImage';
+import InputSpinner from '@/components/elements/InputSpinner';
+import useFlash from '@/plugins/useFlash';
 
 const StartupContainer = () => {
-    const uuid = ServerContext.useStoreState(state => state.server.data!.uuid);
-    const invocation = ServerContext.useStoreState(state => state.server.data!.invocation);
-    const variables = ServerContext.useStoreState(state => state.server.data!.variables);
+    const [ loading, setLoading ] = useState(false);
+    const { clearFlashes, clearAndAddHttpError } = useFlash();
 
-    const { data, error, isValidating, mutate } = getServerStartup(uuid, { invocation, variables });
+    const uuid = ServerContext.useStoreState(state => state.server.data!.uuid);
+    const variables = ServerContext.useStoreState(({ server }) => ({
+        variables: server.data!.variables,
+        invocation: server.data!.invocation,
+        dockerImage: server.data!.dockerImage,
+        // @ts-ignore
+    }), isEqual);
+
+    const { data, error, isValidating, mutate } = getServerStartup(uuid, {
+        ...variables,
+        dockerImages: [ variables.dockerImage ],
+    });
 
     const setServerFromState = ServerContext.useStoreActions(actions => actions.server.setServerFromState);
+    const isCustomImage = data && !data.dockerImages.map(v => v.toLowerCase()).includes(variables.dockerImage.toLowerCase());
 
     useEffect(() => {
         // Since we're passing in initial data this will not trigger on mount automatically. We
@@ -36,6 +53,20 @@ const StartupContainer = () => {
         }));
     }, [ data ]);
 
+    const updateSelectedDockerImage = useCallback((v: React.ChangeEvent<HTMLSelectElement>) => {
+        setLoading(true);
+        clearFlashes('startup:image');
+
+        const image = v.currentTarget.value;
+        setSelectedDockerImage(uuid, image)
+            .then(() => setServerFromState(s => ({ ...s, dockerImage: image })))
+            .catch(error => {
+                console.error(error);
+                clearAndAddHttpError({ key: 'startup:image', error });
+            })
+            .then(() => setLoading(false));
+    }, [ uuid ]);
+
     return (
         !data ?
             (!error || (error && isValidating)) ?
@@ -47,15 +78,49 @@ const StartupContainer = () => {
                     onRetry={() => mutate()}
                 />
             :
-            <ServerContentBlock title={'Startup Settings'}>
-                <TitledGreyBox title={'Startup Command'}>
-                    <div css={tw`px-1 py-2`}>
-                        <p css={tw`font-mono bg-neutral-900 rounded py-2 px-4`}>
-                            {data.invocation}
-                        </p>
-                    </div>
-                </TitledGreyBox>
-                <div css={tw`grid gap-8 md:grid-cols-2 mt-10`}>
+            <ServerContentBlock title={'Startup Settings'} showFlashKey={'startup:image'}>
+                <div css={tw`flex`}>
+                    <TitledGreyBox title={'Startup Command'} css={tw`flex-1`}>
+                        <div css={tw`px-1 py-2`}>
+                            <p css={tw`font-mono bg-neutral-900 rounded py-2 px-4`}>
+                                {data.invocation}
+                            </p>
+                        </div>
+                    </TitledGreyBox>
+                    <TitledGreyBox title={'Docker Image'} css={tw`flex-1 lg:flex-none lg:w-1/3 ml-10`}>
+                        {data.dockerImages.length > 1 && !isCustomImage ?
+                            <>
+                                <InputSpinner visible={loading}>
+                                    <Select
+                                        disabled={data.dockerImages.length < 2}
+                                        onChange={updateSelectedDockerImage}
+                                        defaultValue={variables.dockerImage}
+                                    >
+                                        {data.dockerImages.map(image => (
+                                            <option key={image} value={image}>{image}</option>
+                                        ))}
+                                    </Select>
+                                </InputSpinner>
+                                <p css={tw`text-xs text-neutral-300 mt-2`}>
+                                    This is an advanced feature allowing you to select a Docker image to use when
+                                    running this server instance.
+                                </p>
+                            </>
+                            :
+                            <>
+                                <Input disabled readOnly value={variables.dockerImage}/>
+                                {isCustomImage &&
+                                <p css={tw`text-xs text-neutral-300 mt-2`}>
+                                    This {'server\'s'} Docker image has been manually set by an administrator and cannot
+                                    be changed through this UI.
+                                </p>
+                                }
+                            </>
+                        }
+                    </TitledGreyBox>
+                </div>
+                <h3 css={tw`mt-8 mb-2 text-2xl`}>Variables</h3>
+                <div css={tw`grid gap-8 md:grid-cols-2`}>
                     {data.variables.map(variable => <VariableBox key={variable.envVariable} variable={variable}/>)}
                 </div>
             </ServerContentBlock>

resources/scripts/components/server/startup/VariableBox.tsx

@@ -32,8 +32,9 @@ const VariableBox = ({ variable }: Props) => {
 
         updateStartupVariable(uuid, variable.envVariable, value)
             .then(([ response, invocation ]) => mutate(data => ({
+                ...data,
                 invocation,
-                variables: data.variables.map(v => v.envVariable === response.envVariable ? response : v),
+                variables: (data.variables || []).map(v => v.envVariable === response.envVariable ? response : v),
             }), false))
             .catch(error => {
                 console.error(error);
@@ -67,7 +68,7 @@ const VariableBox = ({ variable }: Props) => {
                     placeholder={variable.defaultValue}
                 />
             </InputSpinner>
-            <p css={tw`mt-1 text-xs text-neutral-400`}>
+            <p css={tw`mt-1 text-xs text-neutral-300`}>
                 {variable.description}
             </p>
         </TitledGreyBox>

routes/api-client.php

@@ -114,5 +114,6 @@ Route::group(['prefix' => '/servers/{server}', 'middleware' => [AuthenticateServ
     Route::group(['prefix' => '/settings'], function () {
         Route::post('/rename', 'Servers\SettingsController@rename');
         Route::post('/reinstall', 'Servers\SettingsController@reinstall');
+        Route::put('/docker-image', 'Servers\SettingsController@dockerImage');
     });
 });