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feat: multi purpose websocket client
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,178 @@ | ||
| /* eslint-disable class-methods-use-this */ | ||
| import { v4 as genUuid } from 'uuid'; | ||
| import camelcaseKeysDeep from 'camelcase-keys-deep'; | ||
| import type { | ||
| IMiddlewareWebSocketSubscriptionMessage, | ||
| ITopHeader, | ||
| ITransaction, | ||
| WebSocketChannelName, | ||
| } from '../types'; | ||
| import { | ||
| WEB_SOCKET_SOURCE, | ||
| WEB_SOCKET_CHANNELS, | ||
| WEB_SOCKET_SUBSCRIBE, | ||
| WEB_SOCKET_UNSUBSCRIBE, | ||
| WEB_SOCKET_RECONNECT_TIMEOUT, | ||
| handleUnknownError, | ||
| NETWORK_MAINNET, | ||
| } from '../popup/utils'; | ||
|
|
||
| class WebSocketClient { | ||
| private static instance: WebSocketClient; | ||
|
|
||
| wsClient: WebSocket = new WebSocket(NETWORK_MAINNET.websocketUrl); | ||
|
|
||
| isWsConnected: boolean = false; | ||
|
|
||
| subscribersQueue: IMiddlewareWebSocketSubscriptionMessage[] = []; | ||
|
|
||
| subscribers: Record<WebSocketChannelName, Record<string, ( | ||
| payload: ITransaction | ITopHeader | ||
| ) => void>> = { | ||
| [WEB_SOCKET_CHANNELS.Transactions]: {}, | ||
| [WEB_SOCKET_CHANNELS.MicroBlocks]: {}, | ||
| [WEB_SOCKET_CHANNELS.KeyBlocks]: {}, | ||
| [WEB_SOCKET_CHANNELS.Object]: {}, | ||
| }; | ||
|
|
||
| handleWebsocketOpen() { | ||
| this.isWsConnected = true; | ||
| try { | ||
| this.subscribersQueue.forEach((message) => { | ||
| this.wsClient.send(JSON.stringify(message)); | ||
| }); | ||
| } catch (error) { | ||
| handleUnknownError(error); | ||
| setTimeout(() => { | ||
| this.handleWebsocketOpen(); | ||
| }, WEB_SOCKET_RECONNECT_TIMEOUT); | ||
| } | ||
| } | ||
|
|
||
| private handleWebsocketClose() { | ||
| this.isWsConnected = false; | ||
| } | ||
|
|
||
| isConnected(): boolean { | ||
| return this.isWsConnected; | ||
| } | ||
|
|
||
| subscribeForChannel( | ||
| message: IMiddlewareWebSocketSubscriptionMessage, | ||
| callback: (payload: any) => void, | ||
| ) { | ||
| if (this.isWsConnected) { | ||
| Object.keys(WEB_SOCKET_SOURCE).forEach((source) => { | ||
| this.wsClient.send(JSON.stringify({ | ||
| ...message, | ||
| source, | ||
| })); | ||
| }); | ||
| } | ||
|
|
||
| this.subscribersQueue.push(message); | ||
|
|
||
| const uuid = genUuid(); | ||
| this.subscribers[message.payload][uuid] = callback; | ||
| return () => { | ||
| delete this.subscribers[message.payload][uuid]; | ||
| }; | ||
| } | ||
|
|
||
| subscribeForAccountUpdates(address: string, callback: (payload: ITransaction) => void) { | ||
| return this.subscribeForChannel( | ||
| { | ||
| op: WEB_SOCKET_SUBSCRIBE, | ||
| payload: WEB_SOCKET_CHANNELS.Object, | ||
| target: address, | ||
| }, | ||
| callback, | ||
| ); | ||
| } | ||
|
|
||
| subscribeForTransactionsUpdates(callback: (payload: ITransaction) => void) { | ||
| return this.subscribeForChannel( | ||
| { | ||
| op: WEB_SOCKET_SUBSCRIBE, | ||
| payload: WEB_SOCKET_CHANNELS.Transactions, | ||
| }, | ||
| callback, | ||
| ); | ||
| } | ||
|
|
||
| subscribeForMicroBlocksUpdates(callback: (payload: ITopHeader) => void) { | ||
| return this.subscribeForChannel( | ||
| { | ||
| op: WEB_SOCKET_SUBSCRIBE, | ||
| payload: WEB_SOCKET_CHANNELS.MicroBlocks, | ||
| }, | ||
| callback, | ||
| ); | ||
| } | ||
|
|
||
| subscribeForKeyBlocksUpdates(callback: (payload: ITopHeader) => void) { | ||
| return this.subscribeForChannel( | ||
| { | ||
| op: WEB_SOCKET_SUBSCRIBE, | ||
| payload: WEB_SOCKET_CHANNELS.KeyBlocks, | ||
| }, | ||
| callback, | ||
| ); | ||
| } | ||
|
|
||
| private handleWebsocketMessage(message: MessageEvent) { | ||
| if (!message.data) { | ||
| return; | ||
| } | ||
| try { | ||
| const data = camelcaseKeysDeep(JSON.parse(message.data)); | ||
|
|
||
| if (!data.payload) { | ||
| return; | ||
| } | ||
|
|
||
| // Call all subscribers for the channel | ||
| Object.values(this.subscribers[data.subscription as WebSocketChannelName]).forEach( | ||
| (subscriberCb) => subscriberCb(data.payload), | ||
| ); | ||
| } catch (error) { | ||
| handleUnknownError(error); | ||
| } | ||
| } | ||
|
|
||
| disconnect() { | ||
| this.subscribersQueue.forEach((message) => { | ||
| Object.keys(WEB_SOCKET_SOURCE).forEach((source) => { | ||
| this.wsClient.send(JSON.stringify({ | ||
| ...message, | ||
| source, | ||
| op: WEB_SOCKET_UNSUBSCRIBE, | ||
| })); | ||
| }); | ||
| }); | ||
| this.wsClient.close(); | ||
| this.wsClient.removeEventListener('open', this.handleWebsocketOpen); | ||
| this.wsClient.removeEventListener('close', this.handleWebsocketClose); | ||
| this.wsClient.removeEventListener('message', this.handleWebsocketClose); | ||
| } | ||
|
|
||
| connect(url: string) { | ||
| if (this.wsClient) { | ||
| this.disconnect(); | ||
| } | ||
|
|
||
| this.wsClient = new WebSocket(url); | ||
| this.wsClient.addEventListener('open', () => this.handleWebsocketOpen()); | ||
| this.wsClient.addEventListener('close', () => this.handleWebsocketClose()); | ||
| this.wsClient.addEventListener('message', (message) => this.handleWebsocketMessage(message)); | ||
| } | ||
|
|
||
| static getInstance(): WebSocketClient { | ||
| if (!WebSocketClient.instance) { | ||
| WebSocketClient.instance = new WebSocketClient(); | ||
| } | ||
| return WebSocketClient.instance; | ||
| } | ||
| } | ||
|
|
||
| export default WebSocketClient.getInstance(); |
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