Refactor sessionManagers

src/Center/CenterSessionManager.ts

@@ -0,0 +1,85 @@
+import EventEmitter from "events";
+import fs from "fs";
+import {Job} from "../Job/Job";
+import Logger from "../Logger";
+import {SessionManager} from "../SessionManager";
+import {SmppSession} from "../SmppSession";
+import {Center} from "./Center";
+
+const CENTER_SESSIONS_FILE: string = process.env.CENTER_SESSIONS_FILE || "center_sessions.json";
+
+export class CenterSessionManager extends SessionManager {
+	sessionId: number = 0;
+	sessions: Center[] = [];
+	identifier: string = "center";
+	readonly logger: Logger = new Logger("CenterSessionManager");
+	readonly eventEmitter: EventEmitter = new EventEmitter();
+
+	constructor() {
+		super();
+		// super.eventEmitter.on(super.SESSION_ADDED_EVENT, (session: SmppSession) => this.eventEmitter.emit(this.SESSION_ADDED_EVENT, session));
+	}
+
+	setup(): void {
+		try {
+			this.logger.log1(`Loading clients from ${CENTER_SESSIONS_FILE}`)
+			let sessions: Buffer = fs.readFileSync(CENTER_SESSIONS_FILE);
+			let loadedSessions: any[] = JSON.parse(String(sessions));
+			this.logger.log1(`Loaded ${loadedSessions.length} clients from ${CENTER_SESSIONS_FILE}`);
+			loadedSessions.forEach(session => {
+				this.createSession(session.url, session.username, session.password).then((sessionObj: SmppSession) => {
+					sessionObj.setDefaultSingleJob(Job.deserialize(session.defaultSingleJob));
+					sessionObj.setDefaultMultipleJob(Job.deserialize(session.defaultMultipleJob));
+				});
+			});
+		} catch (e) {
+			this.logger.log1(`Error loading clients from ${CENTER_SESSIONS_FILE}: ${e}`);
+			return;
+		}
+	}
+
+	cleanup(): void {
+		this.logger.log1(`Saving clients to ${CENTER_SESSIONS_FILE}...`);
+		fs.writeFileSync(CENTER_SESSIONS_FILE, JSON.stringify(this.serialize(), null, 4));
+	}
+
+	createSession(port: number, username: string, password: string): Promise<SmppSession> {
+		return new Promise<SmppSession>((resolve, reject) => {
+			this.logger.log1(`Creating session with port ${port}`);
+			this.getSessionByPort(port).then(s => {
+				resolve(s);
+			}, err => {
+			});
+			this.verifyPort(port, reject);
+			this.verifyUsername(username, reject);
+			this.verifyPassword(password, reject);
+
+			let client = new Center(this.sessionId++, port, username, password);
+			this.addSession(client).then(() => {
+				resolve(client);
+			});
+		});
+	}
+
+	getSessionByPort(port: number): Promise<SmppSession> {
+		return new Promise<SmppSession>((resolve, reject) => {
+			this.logger.log1(`Looking for session with port ${port}...`);
+			let session: SmppSession | undefined = this.sessions.find((s: Center) => s.getPort() === port);
+			if (session) {
+				this.logger.log1(`Found session with port ${port}`);
+				resolve(session);
+			} else {
+				this.logger.log1(`Session with port ${port} not found`);
+				reject(`Session with port ${port} not found`);
+			}
+		});
+	}
+
+	private verifyPort(port: number, reject: (reason?: any) => void) {
+		if (!port) {
+			let error = `Request to make a new center failed because of missing port.`;
+			this.logger.log1(error);
+			reject(error);
+		}
+	}
+}