| 1 | import { type IncomingMessage, Server, type ServerResponse } from 'node:http'; |
| 2 | |
| 3 | import type { WebSocket } from 'ws'; |
| 4 | |
| 5 | import type { AbstractUIService } from './ui-services/AbstractUIService'; |
| 6 | import { UIServiceFactory } from './ui-services/UIServiceFactory'; |
| 7 | import { BaseError } from '../../exception'; |
| 8 | import { |
| 9 | AuthenticationType, |
| 10 | type ChargingStationData, |
| 11 | type ProcedureName, |
| 12 | type ProtocolRequest, |
| 13 | type ProtocolResponse, |
| 14 | type ProtocolVersion, |
| 15 | type RequestPayload, |
| 16 | type ResponsePayload, |
| 17 | type UIServerConfiguration, |
| 18 | } from '../../types'; |
| 19 | |
| 20 | export abstract class AbstractUIServer { |
| 21 | public readonly chargingStations: Map<string, ChargingStationData>; |
| 22 | protected readonly httpServer: Server; |
| 23 | protected readonly responseHandlers: Map<string, ServerResponse | WebSocket>; |
| 24 | protected readonly uiServices: Map<ProtocolVersion, AbstractUIService>; |
| 25 | |
| 26 | public constructor(protected readonly uiServerConfiguration: UIServerConfiguration) { |
| 27 | this.chargingStations = new Map<string, ChargingStationData>(); |
| 28 | this.httpServer = new Server(); |
| 29 | this.responseHandlers = new Map<string, ServerResponse | WebSocket>(); |
| 30 | this.uiServices = new Map<ProtocolVersion, AbstractUIService>(); |
| 31 | } |
| 32 | |
| 33 | public buildProtocolRequest( |
| 34 | id: string, |
| 35 | procedureName: ProcedureName, |
| 36 | requestPayload: RequestPayload |
| 37 | ): ProtocolRequest { |
| 38 | return [id, procedureName, requestPayload]; |
| 39 | } |
| 40 | |
| 41 | public buildProtocolResponse(id: string, responsePayload: ResponsePayload): ProtocolResponse { |
| 42 | return [id, responsePayload]; |
| 43 | } |
| 44 | |
| 45 | public stop(): void { |
| 46 | this.chargingStations.clear(); |
| 47 | } |
| 48 | |
| 49 | protected startHttpServer(): void { |
| 50 | if (this.httpServer.listening === false) { |
| 51 | this.httpServer.listen(this.uiServerConfiguration.options); |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | protected registerProtocolVersionUIService(version: ProtocolVersion): void { |
| 56 | if (this.uiServices.has(version) === false) { |
| 57 | this.uiServices.set(version, UIServiceFactory.getUIServiceImplementation(version, this)); |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | protected authenticate(req: IncomingMessage, next: (err?: Error) => void): void { |
| 62 | if (this.isBasicAuthEnabled() === true) { |
| 63 | if (this.isValidBasicAuth(req) === false) { |
| 64 | next(new BaseError('Unauthorized')); |
| 65 | } |
| 66 | next(); |
| 67 | } |
| 68 | next(); |
| 69 | } |
| 70 | |
| 71 | private isBasicAuthEnabled(): boolean { |
| 72 | return ( |
| 73 | this.uiServerConfiguration.authentication?.enabled === true && |
| 74 | this.uiServerConfiguration.authentication?.type === AuthenticationType.BASIC_AUTH |
| 75 | ); |
| 76 | } |
| 77 | |
| 78 | private isValidBasicAuth(req: IncomingMessage): boolean { |
| 79 | const authorizationHeader = req.headers.authorization ?? ''; |
| 80 | const authorizationToken = authorizationHeader.split(/\s+/).pop() ?? ''; |
| 81 | const authentication = Buffer.from(authorizationToken, 'base64').toString(); |
| 82 | const authenticationParts = authentication.split(/:/); |
| 83 | const username = authenticationParts.shift(); |
| 84 | const password = authenticationParts.join(':'); |
| 85 | return ( |
| 86 | this.uiServerConfiguration.authentication?.username === username && |
| 87 | this.uiServerConfiguration.authentication?.password === password |
| 88 | ); |
| 89 | } |
| 90 | |
| 91 | public abstract start(): void; |
| 92 | public abstract sendRequest(request: ProtocolRequest): void; |
| 93 | public abstract sendResponse(response: ProtocolResponse): void; |
| 94 | public abstract logPrefix( |
| 95 | moduleName?: string, |
| 96 | methodName?: string, |
| 97 | prefixSuffix?: string |
| 98 | ): string; |
| 99 | } |