smartuniverse/ts/smartuniverse.classes.universe.ts

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import * as plugins from './smartuniverse.plugins';
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import { Handler, Route, Server } from '@pushrocks/smartexpress';
import { UniverseCache, UniverseChannel, UniverseMessage } from './';
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import * as paths from './smartuniverse.paths';
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import * as interfaces from './interfaces';
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import { UniverseConnection } from './smartuniverse.classes.universeconnection';
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export interface ISmartUniverseConstructorOptions {
messageExpiryInMilliseconds: number;
}
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/**
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* main class that setups a Universe
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*/
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export class Universe {
// subinstances
public universeCache: UniverseCache;
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// options
private options: ISmartUniverseConstructorOptions;
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/**
* the smartexpress server used
*/
private smartexpressServer: plugins.smartexpress.Server;
/**
* the smartsocket used
*/
private smartsocket: plugins.smartsocket.Smartsocket;
constructor(optionsArg: ISmartUniverseConstructorOptions) {
this.options = optionsArg;
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this.universeCache = new UniverseCache(this, this.options.messageExpiryInMilliseconds);
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}
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/**
* stores the version of the universe server running
* this is done since the version is exposed through the api and multiple fs actions are avoided this way.
*/
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private universeVersionStore: string;
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/**
* get the currently running version of smartuniverse
*/
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public getUniverseVersion() {
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if (this.universeVersionStore) {
return this.universeVersionStore;
} else {
const packageJson = plugins.smartfile.fs.toObjectSync(paths.packageJson);
this.universeVersionStore = packageJson.version;
return this.universeVersionStore;
}
}
/**
* adds a channel to the Universe
*/
public async addChannel(nameArg: string, passphraseArg: string) {
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const newChannel = UniverseChannel.createChannel(this, nameArg, passphraseArg);
}
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/**
* initiates a server
*/
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public async start(portArg: number) {
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// lets create the base smartexpress server
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this.smartexpressServer = new plugins.smartexpress.Server({
cors: true,
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defaultAnswer: async () => {
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return `smartuniverse server ${this.getUniverseVersion()}`;
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},
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forceSsl: false,
port: portArg
});
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// add websocket upgrade
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this.smartsocket = new plugins.smartsocket.Smartsocket({});
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// add a role for the clients
const ClientRole = new plugins.smartsocket.SocketRole({
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name: 'UniverseClient',
passwordHash: plugins.smarthash.sha256FromStringSync('UniverseClient') // authentication happens on another level
});
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// add the role to smartsocket
this.smartsocket.addSocketRoles([ClientRole]);
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const socketFunctionSubscription = new plugins.smartsocket.SocketFunction({
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allowedRoles: [ClientRole], // there is only one client role, Authentication happens on another level
funcName: 'channelSubscription',
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funcDef: async (
dataArg: interfaces.IServerCallSubscribeActionPayload,
socketConnectionArg
) => {
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// run in "this context" of this class
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await (async () => {
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const universeConnection = new UniverseConnection({
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socketConnection: socketConnectionArg,
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authenticationRequests: [dataArg]
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});
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await UniverseConnection.addConnectionToCache(this, universeConnection);
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return {
'subscription status': 'success'
};
})();
}
});
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const socketFunctionProcessMessage = new plugins.smartsocket.SocketFunction({
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allowedRoles: [ClientRole], // there is only one client role, Authentication happens on another level
funcName: 'processMessage',
funcDef: async (dataArg: interfaces.IUniverseMessage, socketConnectionArg) => {
// run in "this" context of this class
await (async () => {
const universeConnection = UniverseConnection.findUniverseConnectionBySocketConnection(
this.universeCache,
socketConnectionArg
);
if (universeConnection) {
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plugins.smartlog.defaultLogger.log('ok', 'found UniverseConnection for socket for incoming message');
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} else {
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plugins.smartlog.defaultLogger.log('warn', 'found no Authorized channel for incoming message');
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return {
error: 'You need to authenticate for a channel'
};
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}
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const unauthenticatedMessage = UniverseMessage.createMessageFromPayload(socketConnectionArg, dataArg);
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const foundChannel = await UniverseChannel.authorizeAMessageForAChannel(
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this.universeCache,
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unauthenticatedMessage
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);
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if (foundChannel && unauthenticatedMessage.authenticated) {
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const authenticatedMessage = unauthenticatedMessage;
await this.universeCache.addMessage(authenticatedMessage);
}
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})();
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}
});
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// add socket functions
this.smartsocket.addSocketFunction(socketFunctionSubscription);
this.smartsocket.addSocketFunction(socketFunctionProcessMessage);
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// add smartsocket to the running smartexpress app
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this.smartsocket.setExternalServer('smartexpress', this.smartexpressServer as any);
// start everything
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await this.smartexpressServer.start();
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await this.smartsocket.start();
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plugins.smartlog.defaultLogger.log('success', 'started universe');
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}
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/**
* stop everything
*/
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public async stopServer() {
await this.smartsocket.stop();
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await this.smartexpressServer.stop();
}
}