Issam E. Maghni | 09a3a1f | 2022-11-02 04:56:21 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2022 Savoir-faire Linux Inc. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU Affero General Public License as |
| 6 | * published by the Free Software Foundation; either version 3 of the |
| 7 | * License, or (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU Affero General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Affero General Public |
| 15 | * License along with this program. If not, see |
| 16 | * <https://www.gnu.org/licenses/>. |
| 17 | */ |
| 18 | import { WebSocketMessage, WebSocketMessageType } from 'jami-web-common'; |
| 19 | import { createContext, useCallback, useEffect, useRef, useState } from 'react'; |
| 20 | |
| 21 | import { apiUrl } from '../utils/constants'; |
| 22 | import { WithChildren } from '../utils/utils'; |
| 23 | import { useAuthContext } from './AuthProvider'; |
| 24 | |
| 25 | export type WebSocketMessageFn = (message: WebSocketMessage) => void; |
| 26 | |
| 27 | interface IWebSocketContext { |
| 28 | bind: (type: WebSocketMessageType, callback: WebSocketMessageFn) => void; |
| 29 | send: WebSocketMessageFn; |
| 30 | } |
| 31 | |
| 32 | export const WebSocketContext = createContext<IWebSocketContext | undefined>(undefined); |
| 33 | |
| 34 | export default ({ children }: WithChildren) => { |
| 35 | const [isConnected, setIsConnected] = useState(false); |
| 36 | const webSocketRef = useRef<WebSocket>(); |
| 37 | const callbacksRef = useRef(new Map<WebSocketMessageType, WebSocketMessageFn[]>()); |
| 38 | |
| 39 | const { token: accessToken } = useAuthContext(); |
| 40 | |
| 41 | const bind = useCallback((type: WebSocketMessageType, messageCallback: WebSocketMessageFn) => { |
| 42 | const messageCallbacks = callbacksRef.current.get(type); |
| 43 | if (messageCallbacks) { |
| 44 | messageCallbacks.push(messageCallback); |
| 45 | } else { |
| 46 | callbacksRef.current.set(type, [messageCallback]); |
| 47 | } |
| 48 | }, []); |
| 49 | |
| 50 | const send = useCallback( |
| 51 | (message: WebSocketMessage) => { |
| 52 | if (isConnected) { |
| 53 | webSocketRef.current?.send(JSON.stringify(message)); |
| 54 | } |
| 55 | }, |
| 56 | [isConnected] |
| 57 | ); |
| 58 | |
| 59 | const handleOnOpen = useCallback(() => setIsConnected(true), []); |
| 60 | |
| 61 | const handleOnClose = useCallback(() => { |
| 62 | setIsConnected(false); |
| 63 | callbacksRef.current.clear(); |
| 64 | }, []); |
| 65 | |
| 66 | const handleOnMessage = useCallback(({ data }: MessageEvent<string>) => { |
| 67 | const message: WebSocketMessage = JSON.parse(data); |
| 68 | const messageCallbacks = callbacksRef.current.get(message.type); |
| 69 | if (messageCallbacks) { |
| 70 | for (const messageCallback of messageCallbacks) { |
| 71 | messageCallback(message); |
| 72 | } |
| 73 | } else { |
| 74 | console.warn(`Unhandled message of type ${message.type}`); |
| 75 | } |
| 76 | }, []); |
| 77 | |
| 78 | const handleOnError = useCallback((event: Event) => { |
| 79 | console.error('Closing WebSocket due to an error:', event); |
| 80 | webSocketRef.current?.close(); |
| 81 | }, []); |
| 82 | |
| 83 | useEffect(() => { |
| 84 | const url = new URL(apiUrl); |
| 85 | url.protocol = 'ws:'; |
| 86 | url.searchParams.set('accessToken', accessToken); |
| 87 | |
| 88 | const webSocket = new WebSocket(url); |
| 89 | webSocket.onopen = handleOnOpen; |
| 90 | webSocket.onclose = handleOnClose; |
| 91 | webSocket.onmessage = handleOnMessage; |
| 92 | webSocket.onerror = handleOnError; |
| 93 | |
| 94 | webSocketRef.current = webSocket; |
| 95 | |
| 96 | return () => webSocket.close(); |
| 97 | }, [accessToken, handleOnOpen, handleOnClose, handleOnMessage, handleOnError]); |
| 98 | |
| 99 | return isConnected ? ( |
| 100 | <WebSocketContext.Provider value={{ bind, send }}>{children}</WebSocketContext.Provider> |
| 101 | ) : ( |
| 102 | <>{children}</> |
| 103 | ); |
| 104 | }; |