Add base web app

matrixgw_backend/Cargo.lock

@@ -19,6 +19,21 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "actix-cors"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "daa239b93927be1ff123eebada5a3ff23e89f0124ccb8609234e5103d5a5ae6d"
+dependencies = [
+ "actix-utils",
+ "actix-web",
+ "derive_more",
+ "futures-util",
+ "log",
+ "once_cell",
+ "smallvec",
+]
+
 [[package]]
 name = "actix-http"
 version = "3.11.2"
@@ -1605,6 +1620,7 @@ dependencies = [
 name = "matrixgw_backend"
 version = "0.1.0"
 dependencies = [
+ "actix-cors",
  "actix-remote-ip",
  "actix-session",
  "actix-web",

matrixgw_backend/Cargo.toml

@@ -14,6 +14,7 @@ tokio = { version = "1.48.0", features = ["full"] }
 actix-web = "4.11.0"
 actix-session = { version = "0.11.0", features = ["redis-session"] }
 actix-remote-ip = "0.1.0"
+actix-cors = "0.7.1"
 light-openid = "1.0.4"
 bytes = "1.10.1"
 sha2 = "0.10.9"

matrixgw_backend/examples/api_curl.rs

@@ -3,10 +3,10 @@ use jwt_simple::algorithms::HS256Key;
 use jwt_simple::prelude::{Clock, Duration, JWTClaims, MACLike};
 use matrixgw_backend::constants;
 use matrixgw_backend::extractors::auth_extractor::TokenClaims;
+use matrixgw_backend::utils::rand_utils::rand_string;
 use std::ops::Add;
 use std::os::unix::prelude::CommandExt;
 use std::process::Command;
-use matrixgw_backend::utils::rand_utils::rand_string;
 
 /// cURL wrapper to query MatrixGW
 #[derive(Parser, Debug)]

matrixgw_backend/src/main.rs

@@ -1,10 +1,13 @@
+use actix_cors::Cors;
 use actix_remote_ip::RemoteIPConfig;
 use actix_session::SessionMiddleware;
 use actix_session::config::SessionLifecycle;
 use actix_session::storage::RedisSessionStore;
 use actix_web::cookie::Key;
+use actix_web::middleware::Logger;
 use actix_web::{App, HttpServer, web};
 use matrixgw_backend::app_config::AppConfig;
+use matrixgw_backend::constants;
 use matrixgw_backend::controllers::{auth_controller, server_controller};
 use matrixgw_backend::users::User;
 
@@ -32,13 +35,23 @@ async fn main() -> std::io::Result<()> {
     );
 
     HttpServer::new(move || {
-        App::new()
-            .wrap(
-                SessionMiddleware::builder(redis_store.clone(), secret_key.clone())
+        let session_mw = SessionMiddleware::builder(redis_store.clone(), secret_key.clone())
             .cookie_name("matrixgw-session".to_string())
             .session_lifecycle(SessionLifecycle::BrowserSession(Default::default()))
-                    .build(),
-            )
+            .build();
+
+        let cors = Cors::default()
+            .allowed_origin(&AppConfig::get().website_origin)
+            .allowed_methods(vec!["GET", "POST", "PUT", "PATCH", "DELETE", "OPTIONS"])
+            .allowed_header(constants::API_AUTH_HEADER)
+            .allow_any_header()
+            .supports_credentials()
+            .max_age(3600);
+
+        App::new()
+            .wrap(Logger::default())
+            .wrap(session_mw)
+            .wrap(cors)
             .app_data(web::Data::new(RemoteIPConfig {
                 proxy: AppConfig::get().proxy_ip.clone(),
             }))

matrixgw_frontend/.env

@@ -0,0 +1 @@
+VITE_APP_BACKEND=http://localhost:8000/api

matrixgw_frontend/.env.production

@@ -0,0 +1 @@
+VITE_APP_BACKEND=/api

matrixgw_frontend/package.json

@@ -10,6 +10,11 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@emotion/react": "^11.14.0",
+    "@emotion/styled": "^11.14.1",
+    "@fontsource/roboto": "^5.2.8",
+    "@mui/icons-material": "^7.3.5",
+    "@mui/material": "^7.3.5",
     "react": "^19.1.1",
     "react-dom": "^19.1.1"
   },

matrixgw_frontend/src/App.css

@@ -1,42 +0,0 @@
-#root {
-  max-width: 1280px;
-  margin: 0 auto;
-  padding: 2rem;
-  text-align: center;
-}
-
-.logo {
-  height: 6em;
-  padding: 1.5em;
-  will-change: filter;
-  transition: filter 300ms;
-}
-.logo:hover {
-  filter: drop-shadow(0 0 2em #646cffaa);
-}
-.logo.react:hover {
-  filter: drop-shadow(0 0 2em #61dafbaa);
-}
-
-@keyframes logo-spin {
-  from {
-    transform: rotate(0deg);
-  }
-  to {
-    transform: rotate(360deg);
-  }
-}
-
-@media (prefers-reduced-motion: no-preference) {
-  a:nth-of-type(2) .logo {
-    animation: logo-spin infinite 20s linear;
-  }
-}
-
-.card {
-  padding: 2em;
-}
-
-.read-the-docs {
-  color: #888;
-}

matrixgw_frontend/src/App.tsx

@@ -1,35 +1,3 @@
-import { useState } from 'react'
-import reactLogo from './assets/react.svg'
-import viteLogo from '/vite.svg'
-import './App.css'
-
-function App() {
-  const [count, setCount] = useState(0)
-
-  return (
-    <>
-      <div>
-        <a href="https://vite.dev" target="_blank">
-          <img src={viteLogo} className="logo" alt="Vite logo" />
-        </a>
-        <a href="https://react.dev" target="_blank">
-          <img src={reactLogo} className="logo react" alt="React logo" />
-        </a>
-      </div>
-      <h1>Vite + React</h1>
-      <div className="card">
-        <button onClick={() => setCount((count) => count + 1)}>
-          count is {count}
-        </button>
-        <p>
-          Edit <code>src/App.tsx</code> and save to test HMR
-        </p>
-      </div>
-      <p className="read-the-docs">
-        Click on the Vite and React logos to learn more
-      </p>
-    </>
-  )
+export function App(): React.ReactElement {
+  return <>hello</>;
 }
-
-export default App

matrixgw_frontend/src/api/ApiClient.ts

@@ -0,0 +1,192 @@
+import { AuthApi } from "./AuthApi";
+
+interface RequestParams {
+  uri: string;
+  method: "GET" | "POST" | "DELETE" | "PATCH" | "PUT";
+  allowFail?: boolean;
+  jsonData?: any;
+  formData?: FormData;
+  upProgress?: (progress: number) => void;
+  downProgress?: (e: { progress: number; total: number }) => void;
+}
+
+interface APIResponse {
+  data: any;
+  status: number;
+}
+
+export class ApiError extends Error {
+  public code: number;
+  public data: number;
+  constructor(message: string, code: number, data: any) {
+    super(`HTTP status: ${code}\nMessage: ${message}\nData=${data}`);
+    this.code = code;
+    this.data = data;
+  }
+}
+
+export class APIClient {
+  /**
+   * Get backend URL
+   */
+  static backendURL(): string {
+    const URL = import.meta.env.VITE_APP_BACKEND ?? "";
+    if (URL.length === 0) throw new Error("Backend URL undefined!");
+    return URL;
+  }
+
+  /**
+   * Get the full URL at which the backend can be contacted
+   */
+  static ActualBackendURL(): string {
+    const backendURL = this.backendURL();
+    if (backendURL.startsWith("/")) return `${location.origin}${backendURL}`;
+    else return backendURL;
+  }
+
+  /**
+   * Check out whether the backend is accessed through
+   * HTTPS or not
+   */
+  static IsBackendSecure(): boolean {
+    return this.ActualBackendURL().startsWith("https");
+  }
+
+  /**
+   * Perform a request on the backend
+   */
+  static async exec(args: RequestParams): Promise<APIResponse> {
+    let body: string | undefined | FormData = undefined;
+    const headers: any = {};
+
+    // JSON request
+    if (args.jsonData) {
+      headers["Content-Type"] = "application/json";
+      body = JSON.stringify(args.jsonData);
+    }
+
+    // Form data request
+    else if (args.formData) {
+      body = args.formData;
+    }
+
+    const url = this.backendURL() + args.uri;
+
+    let data;
+    let status: number;
+
+    // Make the request with XMLHttpRequest
+    if (args.upProgress) {
+      const res: XMLHttpRequest = await new Promise((resolve, reject) => {
+        const xhr = new XMLHttpRequest();
+        xhr.upload.addEventListener("progress", (e) => {
+          args.upProgress!(e.loaded / e.total);
+        });
+        xhr.addEventListener("load", () => {
+          resolve(xhr);
+        });
+        xhr.addEventListener("error", () => {
+          reject(new Error("File upload failed"));
+        });
+        xhr.addEventListener("abort", () => {
+          reject(new Error("File upload aborted"));
+        });
+        xhr.addEventListener("timeout", () => {
+          reject(new Error("File upload timeout"));
+        });
+        xhr.open(args.method, url, true);
+        xhr.withCredentials = true;
+        for (const key in headers) {
+          if (Object.prototype.hasOwnProperty.call(headers, key))
+            xhr.setRequestHeader(key, headers[key]);
+        }
+        xhr.send(body);
+      });
+
+      status = res.status;
+      if (res.responseType === "json") data = JSON.parse(res.responseText);
+      else data = res.response;
+    }
+
+    // Make the request with fetch
+    else {
+      const res = await fetch(url, {
+        method: args.method,
+        body: body,
+        headers: headers,
+        credentials: "include",
+      });
+
+      // Process response
+      // JSON response
+      if (res.headers.get("content-type") === "application/json")
+        data = await res.json();
+      // Text / XML response
+      else if (
+        ["application/xml", "text/plain"].includes(
+          res.headers.get("content-type") ?? ""
+        )
+      )
+        data = await res.text();
+      // Binary file, tracking download progress
+      else if (res.body !== null && args.downProgress) {
+        // Track download progress
+        const contentEncoding = res.headers.get("content-encoding");
+        const contentLength = contentEncoding
+          ? null
+          : res.headers.get("content-length");
+
+        const total = parseInt(contentLength ?? "0", 10);
+        let loaded = 0;
+
+        const resInt = new Response(
+          new ReadableStream({
+            start(controller) {
+              const reader = res.body!.getReader();
+
+              const read = async () => {
+                try {
+                  const ret = await reader.read();
+                  if (ret.done) {
+                    controller.close();
+                    return;
+                  }
+                  loaded += ret.value.byteLength;
+                  args.downProgress!({ progress: loaded, total });
+                  controller.enqueue(ret.value);
+                  read();
+                } catch (e) {
+                  console.error(e);
+                  controller.error(e);
+                }
+              };
+
+              read();
+            },
+          })
+        );
+
+        data = await resInt.blob();
+      }
+
+      // Do not track progress (binary file)
+      else data = await res.blob();
+
+      status = res.status;
+    }
+
+    // Handle expired tokens
+    if (status === 412) {
+      AuthApi.UnsetAuthenticated();
+      window.location.href = "/";
+    }
+
+    if (!args.allowFail && (status < 200 || status > 299))
+      throw new ApiError("Request failed!", status, data);
+
+    return {
+      data: data,
+      status: status,
+    };
+  }
+}

matrixgw_frontend/src/api/AuthApi.ts

@@ -0,0 +1,87 @@
+import { APIClient } from "./ApiClient";
+
+export interface AuthInfo {
+  id: number;
+  time_create: number;
+  time_update: number;
+  name: string;
+  email: string;
+}
+
+const TokenStateKey = "auth-state";
+
+export class AuthApi {
+  /**
+   * Check out whether user is signed in or not
+   */
+  static get SignedIn(): boolean {
+    return localStorage.getItem(TokenStateKey) !== null;
+  }
+
+  /**
+   * Mark user as authenticated
+   */
+  static SetAuthenticated() {
+    localStorage.setItem(TokenStateKey, "");
+  }
+
+  /**
+   * Un-mark user as authenticated
+   */
+  static UnsetAuthenticated() {
+    localStorage.removeItem(TokenStateKey);
+  }
+
+  /**
+   * Start OpenID login
+   */
+  static async StartOpenIDLogin(): Promise<{ url: string }> {
+    return (
+      await APIClient.exec({
+        uri: "/auth/start_oidc",
+        method: "GET",
+      })
+    ).data;
+  }
+
+  /**
+   * Finish OpenID login
+   */
+  static async FinishOpenIDLogin(code: string, state: string): Promise<void> {
+    await APIClient.exec({
+      uri: "/auth/finish_oidc",
+      method: "POST",
+      jsonData: { code: code, state: state },
+    });
+
+    this.SetAuthenticated();
+  }
+
+  /**
+   * Get auth information
+   */
+  static async GetAuthInfo(): Promise<AuthInfo> {
+    return (
+      await APIClient.exec({
+        uri: "/auth/info",
+        method: "GET",
+      })
+    ).data;
+  }
+
+  /**
+   * Sign out
+   */
+  static async SignOut(): Promise<void> {
+    try {
+      await APIClient.exec({
+        uri: "/auth/sign_out",
+        method: "GET",
+      });
+    } catch (e) {
+      console.error("Failed to sign out user on API!", e);
+    }
+
+    this.UnsetAuthenticated();
+  }
+}

matrixgw_frontend/src/api/ServerApi.ts

@@ -0,0 +1,48 @@
+import { APIClient } from "./ApiClient";
+
+export interface ServerConfig {
+  auth_disabled: boolean;
+  oidc_provider_name: string;
+  constraints: ServerConstraints;
+}
+
+export interface AccountType {
+  label: string;
+  code: string;
+  icon: string;
+}
+
+export interface ServerConstraints {
+  token_name: LenConstraint;
+  token_ip_net: LenConstraint;
+  token_max_inactivity: LenConstraint;
+}
+
+export interface LenConstraint {
+  min: number;
+  max: number;
+}
+
+let config: ServerConfig | null = null;
+
+export class ServerApi {
+  /**
+   * Get server configuration
+   */
+  static async LoadConfig(): Promise<void> {
+    config = (
+      await APIClient.exec({
+        uri: "/server/config",
+        method: "GET",
+      })
+    ).data;
+  }
+
+  /**
+   * Get cached configuration
+   */
+  static get Config(): ServerConfig {
+    if (config === null) throw new Error("Missing configuration!");
+    return config;
+  }
+}

matrixgw_frontend/src/assets/react.svg

@@ -1 +0,0 @@
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matrixgw_frontend/src/hooks/contexts_provider/AlertDialogProvider.tsx

@@ -0,0 +1,68 @@
+import {
+  Button,
+  Dialog,
+  DialogActions,
+  DialogContent,
+  DialogContentText,
+  DialogTitle,
+} from "@mui/material";
+import React, { type PropsWithChildren } from "react";
+
+type AlertContext = (message: string, title?: string) => Promise<void>;
+
+const AlertContextK = React.createContext<AlertContext | null>(null);
+
+export function AlertDialogProvider(p: PropsWithChildren): React.ReactElement {
+  const [open, setOpen] = React.useState(false);
+
+  const [title, setTitle] = React.useState<string | undefined>(undefined);
+  const [message, setMessage] = React.useState("");
+
+  const cb = React.useRef<null | (() => void)>(null);
+
+  const handleClose = () => {
+    setOpen(false);
+
+    if (cb.current !== null) cb.current();
+    cb.current = null;
+  };
+
+  const hook: AlertContext = (message, title) => {
+    setTitle(title);
+    setMessage(message);
+    setOpen(true);
+
+    return new Promise((res) => {
+      cb.current = res;
+    });
+  };
+
+  return (
+    <>
+      <AlertContextK value={hook}>{p.children}</AlertContextK>
+
+      <Dialog
+        open={open}
+        onClose={handleClose}
+        aria-labelledby="alert-dialog-title"
+        aria-describedby="alert-dialog-description"
+      >
+        {title && <DialogTitle id="alert-dialog-title">{title}</DialogTitle>}
+        <DialogContent>
+          <DialogContentText id="alert-dialog-description">
+            {message}
+          </DialogContentText>
+        </DialogContent>
+        <DialogActions>
+          <Button onClick={handleClose} autoFocus>
+            Ok
+          </Button>
+        </DialogActions>
+      </Dialog>
+    </>
+  );
+}
+
+export function useAlert(): AlertContext {
+  return React.use(AlertContextK)!;
+}

matrixgw_frontend/src/hooks/contexts_provider/ConfirmDialogProvider.tsx

@@ -0,0 +1,98 @@
+import {
+  Button,
+  Dialog,
+  DialogActions,
+  DialogContent,
+  DialogContentText,
+  DialogTitle,
+} from "@mui/material";
+import React, { type PropsWithChildren } from "react";
+
+type ConfirmContext = (
+  message: string | React.ReactElement,
+  title?: string,
+  confirmButton?: string
+) => Promise<boolean>;
+
+const ConfirmContextK = React.createContext<ConfirmContext | null>(null);
+
+export function ConfirmDialogProvider(
+  p: PropsWithChildren
+): React.ReactElement {
+  const [open, setOpen] = React.useState(false);
+
+  const [title, setTitle] = React.useState<string | undefined>(undefined);
+  const [message, setMessage] = React.useState<string | React.ReactElement>("");
+  const [confirmButton, setConfirmButton] = React.useState<string | undefined>(
+    undefined
+  );
+
+  const cb = React.useRef<null | ((a: boolean) => void)>(null);
+
+  const handleClose = (confirm: boolean) => {
+    setOpen(false);
+
+    if (cb.current !== null) cb.current(confirm);
+    cb.current = null;
+  };
+
+  const hook: ConfirmContext = (message, title, confirmButton) => {
+    setTitle(title);
+    setMessage(message);
+    setConfirmButton(confirmButton);
+    setOpen(true);
+
+    return new Promise((res) => {
+      cb.current = res;
+    });
+  };
+
+  const keyUp = (e: React.KeyboardEvent) => {
+    if (e.code === "Enter") handleClose(true);
+  };
+
+  return (
+    <>
+      <ConfirmContextK value={hook}>{p.children}</ConfirmContextK>
+
+      <Dialog
+        open={open}
+        onClose={() => {
+          handleClose(false);
+        }}
+        aria-labelledby="alert-dialog-title"
+        aria-describedby="alert-dialog-description"
+        onKeyUp={keyUp}
+      >
+        {title && <DialogTitle id="alert-dialog-title">{title}</DialogTitle>}
+        <DialogContent>
+          <DialogContentText id="alert-dialog-description">
+            {message}
+          </DialogContentText>
+        </DialogContent>
+        <DialogActions>
+          <Button
+            onClick={() => {
+              handleClose(false);
+            }}
+            autoFocus
+          >
+            Cancel
+          </Button>
+          <Button
+            onClick={() => {
+              handleClose(true);
+            }}
+            color="error"
+          >
+            {confirmButton ?? "Confirm"}
+          </Button>
+        </DialogActions>
+      </Dialog>
+    </>
+  );
+}
+
+export function useConfirm(): ConfirmContext {
+  return React.use(ConfirmContextK)!;
+}

matrixgw_frontend/src/hooks/contexts_provider/LoadingMessageProvider.tsx

@@ -0,0 +1,62 @@
+import {
+  CircularProgress,
+  Dialog,
+  DialogContent,
+  DialogContentText,
+} from "@mui/material";
+import React, { type PropsWithChildren } from "react";
+
+interface LoadingMessageContext {
+  show: (message: string) => void;
+  hide: () => void;
+}
+
+const LoadingMessageContextK =
+  React.createContext<LoadingMessageContext | null>(null);
+
+export function LoadingMessageProvider(
+  p: PropsWithChildren
+): React.ReactElement {
+  const [open, setOpen] = React.useState(false);
+
+  const [message, setMessage] = React.useState("");
+
+  const hook: LoadingMessageContext = {
+    show(message) {
+      setMessage(message);
+      setOpen(true);
+    },
+    hide() {
+      setMessage("");
+      setOpen(false);
+    },
+  };
+
+  return (
+    <>
+      <LoadingMessageContextK value={hook}>{p.children}</LoadingMessageContextK>
+
+      <Dialog open={open}>
+        <DialogContent>
+          <DialogContentText>
+            <div
+              style={{
+                display: "flex",
+                alignItems: "center",
+                justifyContent: "center",
+              }}
+            >
+              <CircularProgress style={{ marginRight: "15px" }} />
+
+              {message}
+            </div>
+          </DialogContentText>
+        </DialogContent>
+      </Dialog>
+    </>
+  );
+}
+
+export function useLoadingMessage(): LoadingMessageContext {
+  return React.use(LoadingMessageContextK)!;
+}

matrixgw_frontend/src/hooks/contexts_provider/SnackbarProvider.tsx

@@ -0,0 +1,41 @@
+import { Snackbar } from "@mui/material";
+
+import React, { type PropsWithChildren } from "react";
+
+type SnackbarContext = (message: string, duration?: number) => void;
+
+const SnackbarContextK = React.createContext<SnackbarContext | null>(null);
+
+export function SnackbarProvider(p: PropsWithChildren): React.ReactElement {
+  const [open, setOpen] = React.useState(false);
+
+  const [message, setMessage] = React.useState("");
+  const [duration, setDuration] = React.useState(0);
+
+  const handleClose = () => {
+    setOpen(false);
+  };
+
+  const hook: SnackbarContext = (message, duration) => {
+    setMessage(message);
+    setDuration(duration ?? 6000);
+    setOpen(true);
+  };
+
+  return (
+    <>
+      <SnackbarContextK value={hook}>{p.children}</SnackbarContextK>
+
+      <Snackbar
+        open={open}
+        autoHideDuration={duration}
+        onClose={handleClose}
+        message={message}
+      />
+    </>
+  );
+}
+
+export function useSnackbar(): SnackbarContext {
+  return React.use(SnackbarContextK)!;
+}

matrixgw_frontend/src/index.css

@@ -1,68 +1,9 @@
-:root {
-  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
-  line-height: 1.5;
-  font-weight: 400;
-
-  color-scheme: light dark;
-  color: rgba(255, 255, 255, 0.87);
-  background-color: #242424;
-
-  font-synthesis: none;
-  text-rendering: optimizeLegibility;
-  -webkit-font-smoothing: antialiased;
-  -moz-osx-font-smoothing: grayscale;
-}
-
-a {
-  font-weight: 500;
-  color: #646cff;
-  text-decoration: inherit;
-}
-a:hover {
-  color: #535bf2;
-}
-
 body {
   margin: 0;
-  display: flex;
-  place-items: center;
-  min-width: 320px;
-  min-height: 100vh;
 }
 
-h1 {
-  font-size: 3.2em;
-  line-height: 1.1;
-}
-
-button {
-  border-radius: 8px;
-  border: 1px solid transparent;
-  padding: 0.6em 1.2em;
-  font-size: 1em;
-  font-weight: 500;
-  font-family: inherit;
-  background-color: #1a1a1a;
-  cursor: pointer;
-  transition: border-color 0.25s;
-}
-button:hover {
-  border-color: #646cff;
-}
-button:focus,
-button:focus-visible {
-  outline: 4px auto -webkit-focus-ring-color;
-}
-
-@media (prefers-color-scheme: light) {
-  :root {
-    color: #213547;
-    background-color: #ffffff;
-  }
-  a:hover {
-    color: #747bff;
-  }
-  button {
-    background-color: #f9f9f9;
-  }
+html,
+body,
+#root {
+  height: 100%;
 }

matrixgw_frontend/src/main.tsx

@@ -1,10 +1,36 @@
-import { StrictMode } from 'react'
-import { createRoot } from 'react-dom/client'
-import './index.css'
-import App from './App.tsx'
+import "@fontsource/roboto/300.css";
+import "@fontsource/roboto/400.css";
+import "@fontsource/roboto/500.css";
+import "@fontsource/roboto/700.css";
 
-createRoot(document.getElementById('root')!).render(
+import { StrictMode } from "react";
+import { createRoot } from "react-dom/client";
+import "./index.css";
+import { App } from "./App";
+import { AlertDialogProvider } from "./hooks/contexts_provider/AlertDialogProvider";
+import { ConfirmDialogProvider } from "./hooks/contexts_provider/ConfirmDialogProvider";
+import { SnackbarProvider } from "./hooks/contexts_provider/SnackbarProvider";
+import { LoadingMessageProvider } from "./hooks/contexts_provider/LoadingMessageProvider";
+import { AsyncWidget } from "./widgets/AsyncWidget";
+import { ServerApi } from "./api/ServerApi";
+
+createRoot(document.getElementById("root")!).render(
   <StrictMode>
-    <App />
-  </StrictMode>,
-)
+    <AlertDialogProvider>
+      <ConfirmDialogProvider>
+        <SnackbarProvider>
+          <LoadingMessageProvider>
+            <AsyncWidget
+              loadKey={1}
+              load={async () => {
+                await ServerApi.LoadConfig();
+              }}
+              errMsg="Failed to load static server configuration!"
+              build={() => <App />}
+            />
+          </LoadingMessageProvider>
+        </SnackbarProvider>
+      </ConfirmDialogProvider>
+    </AlertDialogProvider>
+  </StrictMode>
+);

matrixgw_frontend/src/widgets/AsyncWidget.tsx

@@ -0,0 +1,94 @@
+import { Alert, Box, Button, CircularProgress } from "@mui/material";
+import { useEffect, useRef, useState } from "react";
+
+const State = {
+  Loading: 0,
+  Ready: 1,
+  Error: 2,
+} as const;
+
+type State = keyof typeof State;
+
+export function AsyncWidget(p: {
+  loadKey: any;
+  load: () => Promise<void>;
+  errMsg: string;
+  build: () => React.ReactElement;
+  ready?: boolean;
+  errAdditionalElement?: () => React.ReactElement;
+}): React.ReactElement {
+  const [state, setState] = useState<number>(State.Loading);
+
+  const counter = useRef<any>(null);
+
+  const load = async () => {
+    try {
+      setState(State.Loading);
+      await p.load();
+      setState(State.Ready);
+    } catch (e) {
+      console.error(e);
+      setState(State.Error);
+    }
+  };
+
+  useEffect(() => {
+    if (counter.current === p.loadKey) return;
+    counter.current = p.loadKey;
+
+    load();
+  });
+
+  if (state === State.Error)
+    return (
+      <Box
+        component="div"
+        sx={{
+          display: "flex",
+          justifyContent: "center",
+          alignItems: "center",
+          height: "100%",
+          flex: "1",
+          flexDirection: "column",
+          backgroundColor: (theme) =>
+            theme.palette.mode === "light"
+              ? theme.palette.grey[100]
+              : theme.palette.grey[900],
+        }}
+      >
+        <Alert
+          variant="outlined"
+          severity="error"
+          style={{ margin: "0px 15px 15px 15px" }}
+        >
+          {p.errMsg}
+        </Alert>
+
+        <Button onClick={load}>Try again</Button>
+
+        {p.errAdditionalElement?.()}
+      </Box>
+    );
+
+  if (state === State.Loading || p.ready === false)
+    return (
+      <Box
+        component="div"
+        sx={{
+          display: "flex",
+          justifyContent: "center",
+          alignItems: "center",
+          height: "100%",
+          flex: "1",
+          backgroundColor: (theme) =>
+            theme.palette.mode === "light"
+              ? theme.palette.grey[100]
+              : theme.palette.grey[900],
+        }}
+      >
+        <CircularProgress />
+      </Box>
+    );
+
+  return p.build();
+}