frnt: Simplified chatmodel getmessages
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@ -3,162 +3,217 @@ import { Observer } from "../observe/Observer";
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import { JsonAPI } from "../singleton/JsonAPI";
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import { ChatMessageViewModel } from "../viewmodel/ChatMessageViewModel";
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import { ChatModelHelper } from "./ChatModelHelper";
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import log = require('loglevel');
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import log = require("loglevel");
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import { ObserverData } from "../observe/ObserverData";
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import { ActiveUserViewModel } from "../viewmodel/ActiveUserViewModel";
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import moment = require("moment");
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interface Params {
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userName: string,
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data: ChatMessageViewModel[],
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op: string
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userName: string;
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data: ChatMessageViewModel[];
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op: string;
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}
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export class ChatModel implements Subject<ChatMessageViewModel> {
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/**
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* @type {Observer[]} List of subscribers. In real life, the list of
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* subscribers can be stored more comprehensively (categorized by event
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* type, etc.).
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*/
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private readonly _observers: Observer<ChatMessageViewModel>[] = [];
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private readonly _messagePageMap: Map<string, number>;
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private readonly _messagesMap: Map<string, ChatMessageViewModel[]>;
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private readonly _chatModelHelper: ChatModelHelper;
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/**
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* @type {Observer[]} List of subscribers. In real life, the list of
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* subscribers can be stored more comprehensively (categorized by event
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* type, etc.).
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*/
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private readonly _observers: Observer<ChatMessageViewModel>[] = [];
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private readonly _messagePageMap: Map<string, number>;
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private readonly _messagesMap: Map<string, ChatMessageViewModel[]>;
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private readonly _chatModelHelper: ChatModelHelper;
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constructor(chatModelHelper: ChatModelHelper) {
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this._messagePageMap = new Map();
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this._messagesMap = new Map();
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this._chatModelHelper = chatModelHelper;
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}
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/**
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* The subscription management methods.
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*/
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public attach(observer: Observer<ChatMessageViewModel>): void {
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log.info('Subject: Attached an observer.');
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this._observers.push(observer);
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}
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constructor(chatModelHelper: ChatModelHelper) {
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this._messagePageMap = new Map();
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this._messagesMap = new Map();
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this._chatModelHelper = chatModelHelper;
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}
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/**
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* The subscription management methods.
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*/
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public attach(observer: Observer<ChatMessageViewModel>): void {
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log.info("Subject: Attached an observer.");
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this._observers.push(observer);
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}
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public detach(observer: Observer<ChatMessageViewModel>): void {
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const observerIndex = this._observers.indexOf(observer);
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this._observers.splice(observerIndex, 1);
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log.info('Subject: Detached an observer.');
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}
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public detach(observer: Observer<ChatMessageViewModel>): void {
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const observerIndex = this._observers.indexOf(observer);
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this._observers.splice(observerIndex, 1);
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log.info("Subject: Detached an observer.");
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}
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private storeUserMessages(username: string, messages: ChatMessageViewModel[], op: string) {
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switch (op) {
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case "clear": this._messagesMap.set(username, []); break;
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case "page": this._messagesMap.set(username, messages.concat(this.getStoredUserMessages(username))); break;
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// case "page": this._messagesMap.set(username, messages);
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case "new": this._messagesMap.set(username, this.getStoredUserMessages(username).concat(messages)); break;
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case "update": this._messagesMap.set(username, this.getStoredUserMessages(username).concat(messages)); break;
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default: new Error("Invalid option");
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private storeUserMessages(
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username: string,
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messages: ChatMessageViewModel[],
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op: string
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) {
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switch (op) {
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case "clear":
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this._messagesMap.set(username, []);
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break;
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case "page":
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this._messagesMap.set(
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username,
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messages.concat(this.getStoredUserMessages(username))
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);
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break;
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// case "page": this._messagesMap.set(username, messages);
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case "new":
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this._messagesMap.set(
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username,
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this.getStoredUserMessages(username).concat(messages)
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);
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break;
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case "update":
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this._messagesMap.set(
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username,
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this.getStoredUserMessages(username).concat(messages)
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);
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break;
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default:
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new Error("Invalid option");
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}
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}
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private getStoredUserMessages(username: string): ChatMessageViewModel[] {
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let temp = this._messagesMap.get(username);
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if (temp == null) return [];
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else {
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return temp;
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}
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}
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/**
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* Trigger an update in each subscriber.
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*/
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public notify(p: Params): void {
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log.info("Subject: Notifying observers...");
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switch (p.op) {
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case "clear":
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{
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const od: ObserverData<ChatMessageViewModel> = {
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data: [],
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op: "clear",
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};
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for (const observer of this._observers) {
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observer.update(od);
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}
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}
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}
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private getStoredUserMessages(username: string): ChatMessageViewModel[] {
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let temp = this._messagesMap.get(username);
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if (temp == null)
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return [];
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else {
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return temp;
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break;
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case "new":
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{
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const od: ObserverData<ChatMessageViewModel> = {
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data: p.data,
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op: p.op,
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};
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for (const observer of this._observers) {
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observer.update(od);
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}
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}
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}
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/**
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* Trigger an update in each subscriber.
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*/
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public notify(p: Params): void {
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log.info('Subject: Notifying observers...');
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switch (p.op) {
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case "clear": {
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const od: ObserverData<ChatMessageViewModel> = { data: [], op: "clear" }
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for (const observer of this._observers) {
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observer.update(od);
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}
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} break;
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case "new": {
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const od: ObserverData<ChatMessageViewModel> = { data: p.data, op: p.op }
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for (const observer of this._observers) {
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observer.update(od);
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}
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} break;
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case "page": {
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const od: ObserverData<ChatMessageViewModel> = { data: p.data, op: p.op }
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for (const observer of this._observers) {
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observer.update(od);
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}
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} break;
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case "update": {
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const od: ObserverData<ChatMessageViewModel> = { data: p.data, op: p.op }
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for (const observer of this._observers) {
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observer.update(od);
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}
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} break;
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default: { log.error("error") }
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break;
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case "page":
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{
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const od: ObserverData<ChatMessageViewModel> = {
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data: p.data,
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op: p.op,
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};
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for (const observer of this._observers) {
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observer.update(od);
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}
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}
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}
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public someBusinessMethod(chatMessageList: ChatMessageViewModel[]): void {
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}
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public clear(): void {
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log.info("Clearing model")
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this._messagePageMap.set(JsonAPI.contactName!, 0);
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this.storeUserMessages(JsonAPI.contactName!, Array(), "clear");
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this.notify({ userName: "", data: [], op: "clear" })
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}
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public async getMessages(vm: ActiveUserViewModel, op: string): Promise<ChatMessageViewModel[]> {
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if (this._messagePageMap.get(vm.userName!) == null)
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this._messagePageMap.set(vm.userName!, 0);
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const pageNumber = this._messagePageMap.get(vm.userName!)
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const cVMs = await this._chatModelHelper.getMessages(vm.userName!, vm.passphrase, pageNumber!, vm.lastMessageTime!, op);
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let cVMs2 = Array();
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if (cVMs != null) {
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log.info('Subject: My state has just changed')
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const existingMessages = this.getStoredUserMessages(vm.userName!);
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log.debug('existing message:')
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log.debug(existingMessages);
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log.debug('new messages:')
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log.debug(cVMs);
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cVMs2 = cVMs.filter(c => {
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const res = existingMessages.filter(m => {
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if (moment(c.messageTime).isSame(moment(m.messageTime)))
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return true;
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})
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if (res.length > 0)
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return false;
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return true;
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})
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if (cVMs2.length != 0 && op == "update") {
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const lastMessageText = vm.lastMessageText = cVMs2[cVMs2.length - 1].message;
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cVMs2.forEach(v => {
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if (v.userName == vm.userName) {
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v.lastMessageTime = cVMs2[cVMs2.length - 1].messageTime;
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v.lastMessageText = cVMs2[cVMs2.length - 1].message.slice(0, 15) + "..."
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}
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})
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};
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if (cVMs2.length != 0 && op != "update") {
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this._messagePageMap.set(vm.userName!, this._messagePageMap.get(vm.userName!)! + 1);
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}
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this.storeUserMessages(vm.userName!, cVMs2, op);
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this.notify({ userName: vm.userName!, data: cVMs2, op: op });
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}
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else {
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log.error('Messages were null');
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break;
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case "update":
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{
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const od: ObserverData<ChatMessageViewModel> = {
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data: p.data,
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op: p.op,
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};
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for (const observer of this._observers) {
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observer.update(od);
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}
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}
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break;
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default: {
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log.error("error");
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}
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}
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}
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return cVMs2;
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public someBusinessMethod(chatMessageList: ChatMessageViewModel[]): void {}
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public clear(): void {
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log.info("Clearing model");
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this._messagePageMap.set(JsonAPI.contactName!, 0);
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this.storeUserMessages(JsonAPI.contactName!, Array(), "clear");
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this.notify({ userName: "", data: [], op: "clear" });
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}
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public async getMessages(
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aVm: ActiveUserViewModel,
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op: string
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): Promise<ChatMessageViewModel[]> {
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if (this._messagePageMap.get(aVm.userName!) == null)
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this._messagePageMap.set(aVm.userName!, 0);
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const pageNumber = this._messagePageMap.get(aVm.userName!);
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const cVMs = await this._chatModelHelper.getMessages(
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aVm.userName!,
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aVm.passphrase,
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pageNumber!,
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aVm.lastMessageTime!,
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op
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);
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let cVMsFiltered = Array<ChatMessageViewModel>();
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if (cVMs != null && cVMs.length != 0) {
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log.info("Subject: My state has just changed");
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const existingMessages = this.getStoredUserMessages(aVm.userName!);
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log.debug("existing message:");
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log.debug(existingMessages);
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log.debug("new messages:");
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log.debug(cVMs);
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// filter duplicates
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cVMsFiltered = cVMs.filter((c) => {
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const res = existingMessages.filter((m) => {
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if (moment(c.messageTime).isSame(moment(m.messageTime))) return true;
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});
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if (res.length > 0) return false;
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return true;
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});
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if (op == "update") {
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// update the active user last message text and times for each user
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const lastMessage = cVMsFiltered[cVMsFiltered.length - 1];
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cVMsFiltered.forEach((v) => {
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if (v.fromUser == aVm.userName) {
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aVm.lastMessageTime = lastMessage.messageTime;
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aVm.lastMessageText = lastMessage.message.slice(0, 15) + "...";
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}
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});
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} else {
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this._messagePageMap.set(
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aVm.userName!,
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this._messagePageMap.get(aVm.userName!)! + 1
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);
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}
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this.storeUserMessages(aVm.userName!, cVMsFiltered, op);
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this.notify({ userName: aVm.userName!, data: cVMsFiltered, op: op });
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}
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public async isPassphraseValid(passphrase: string, userName: string): Promise<boolean> {
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let valid = await this._chatModelHelper.isPassphraseValid(passphrase, userName);
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return valid;
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}
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}
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return cVMsFiltered;
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}
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public async isPassphraseValid(
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passphrase: string,
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userName: string
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): Promise<boolean> {
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let valid = await this._chatModelHelper.isPassphraseValid(
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passphrase,
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userName
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);
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return valid;
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}
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}
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