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import { InQueueType } from '../enums/in-queue-type'; |
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import { IReliableSocketEmitOptions } from '../interfaces/i-reliable-socket-emit-options'; |
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import { IReliableSocketRequest } from '../interfaces/i-reliable-socket-request'; |
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import { IReliableSocketRequestPack } from '../interfaces/i-reliable-socket-request-pack'; |
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import { IReliableSocketRequestQueues } from '../interfaces/i-reliable-socket-request-queues'; |
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import { ISocketEmitter } from '../interfaces/i-socket-emitter'; |
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export class ReliableSocketRequestEmitter { |
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private defaultEmitOptions = { |
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inQueueType: InQueueType.anytime, |
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maxTryCount: 10, |
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queueName: 'default', |
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retryTime: 1000, |
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}; |
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private emitQueues: IReliableSocketRequestQueues = { |
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default: [], |
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}; |
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private emitRequestCounter = 0; |
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public emit( |
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socket: ISocketEmitter, |
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eventName: string, |
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body: any, |
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optionsIn: Partial<IReliableSocketEmitOptions> = this |
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.defaultEmitOptions, |
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): Promise<any> { |
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const options: IReliableSocketEmitOptions = Object.assign( |
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{}, |
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this.defaultEmitOptions, |
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optionsIn, |
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); |
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const socketRequest = { |
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eventName, |
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id: this.emitRequestCounter++, |
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isCompleted: false, |
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options, |
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tryCountLeft: options.maxTryCount, |
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body |
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} as IReliableSocketRequest; |
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if (this.emitQueues[options.queueName] === undefined) { |
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this.emitQueues[options.queueName] = []; |
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} |
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this.emitQueues[options.queueName].push(socketRequest); |
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return this.createEmitPromise(socket, socketRequest, options); |
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} |
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private removeFromEmitQueue(socketRequest: IReliableSocketRequest) { |
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this.emitQueues[socketRequest.options.queueName].splice( |
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this.emitQueues[socketRequest.options.queueName].indexOf( |
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socketRequest, |
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), |
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1, |
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); |
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} |
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private createEmitPromise( |
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socket: ISocketEmitter, |
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socketRequest: IReliableSocketRequest, |
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options: IReliableSocketEmitOptions, |
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): Promise<any> { |
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return new Promise((resolve, reject) => { |
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socketRequest.isCompleted = false; |
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this.emitRequest(socket, socketRequest, response => { |
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resolve(response); |
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}, (err: string) => { |
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reject(err); |
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}); |
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socketRequest.interval = setInterval(() => { |
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this.emitRequest(socket, socketRequest, response => { |
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resolve(response); |
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}, (err: string) => { |
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reject(err); |
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}); |
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}, options.retryTime); |
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}); |
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} |
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/** |
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* Emit the request in a package and mark as completed if success |
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*/ |
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private emitRequest( |
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socket: ISocketEmitter, |
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socketRequest: IReliableSocketRequest, |
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callback: (response: any) => void, |
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reject: (msg: string) => void, |
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): void { |
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// socketRequest.options.maxTryCount === 0 means infinite retries |
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if (socketRequest.tryCountLeft <= 0 && socketRequest.options.maxTryCount !== 0) { |
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reject('Max try count reached!'); |
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return; |
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} |
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// Request already completed |
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if (socketRequest.isCompleted || (socketRequest.tryCountLeft <= 0 && socketRequest.options.maxTryCount !== 0)) { |
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if (socketRequest.interval) { |
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clearInterval(socketRequest.interval); |
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} |
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return; |
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} |
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if (socket) { |
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socket.emit( |
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socketRequest.eventName, |
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this.createEmitPack(socketRequest), |
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(response: any) => { |
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socketRequest.isCompleted = true; |
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this.removeFromEmitQueue(socketRequest); |
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if (socketRequest.interval) { |
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clearInterval(socketRequest.interval); |
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} |
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callback(response); |
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}, |
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); |
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} else { |
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throw Error('No provided socket!'); |
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} |
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} |
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/** |
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* Create transfer package with meta information |
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130
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*/ |
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131
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private createEmitPack( |
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request: IReliableSocketRequest |
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133
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): IReliableSocketRequestPack { |
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return { |
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body: request.body, |
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136
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meta: { |
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id: this.emitRequestCounter, |
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inQueueType: request.options.inQueueType, |
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queueName: request.options.queueName, |
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}, |
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}; |
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} |
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143
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} |
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cothema /
reliable-socket-io-request
