too many changes, i'm tired for describe all. But I try fix themes logic, okay?

frontend/src/api/RESTful.ts

@@ -1,7 +1,8 @@
+import { AuthenticationPage, AuthenticationRules } from "../pages/auth/auth";
 import { NewsData, NewsFeed } from "../pages/feed/news";
 import { NewsItem } from "../pages/feed/news-item";
 
-type EndpointURL = "" | `http${'s' | ''}://${string}`;
+type EndpointURL = "/api" | `http${'s' | ''}://${string}`;
 
 interface ErrorDetails {
     code: string,
@@ -14,17 +15,27 @@ interface APIResponse<T> {
 }
 
 let newsFeed : NewsFeed | null = null;
+let authPage : AuthenticationPage | null = null;
 
 class ErrorAPI extends Error {}
 
 export class ControllerAPI {
     protected endpoint: EndpointURL;
-    constructor(endpoint: EndpointURL = "") {
+    constructor(endpoint: EndpointURL = "/api") {
         this.endpoint = endpoint;
     }
 
     protected async request<T>(path: string, options: RequestInit = {}): Promise<T> {
-        const url = new URL(path, this.endpoint || window.location.origin).href;
+        let url : string;
+        if (this.endpoint === "/api") {
+            url = new URL("/api", window.location.origin).href + path;
+        }
+        else if (/\/$/i.test(this.endpoint)) {
+            url = this.endpoint + path.slice(1);
+        }
+        else {
+            url = this.endpoint + path;
+        }
 
         const response = await fetch(url, options);
         const result: APIResponse<T> = await response.json();
@@ -50,21 +61,21 @@ export class ControllerAPI {
     async isAuthenticated(): Promise<boolean> {
         if (!this.checkFirstAuth()) return false;
 
-        const result = await this.request<boolean>('/api/isAuthenticated', {
+        const result = await this.request<boolean>('/isAuthenticated', {
             method: 'GET',
             credentials: 'include' // Include cookies for authentication
         });
         return result;
     }
 
-    async getNews(returnElement: boolean = false) : Promise<NewsFeed | NewsData[]> {
+    async getNews(returnPage: boolean = false) : Promise<NewsFeed | NewsData[]> {
         this.throwIfUnauthed();
         
-        const result = await this.request<NewsData[]>('/api/news', {
+        const result = await this.request<NewsData[]>('/news', {
             method: 'GET',
             credentials: 'include' // Include cookies for authentication
         });
-        if (!returnElement)
+        if (!returnPage)
             return result;
         if (!newsFeed)
             newsFeed = new NewsFeed(result.map(x => new NewsItem(
@@ -76,4 +87,15 @@ export class ControllerAPI {
             )));
         return newsFeed;
     }
+
+    async getAuthRules(returnPage: boolean = false) : Promise<AuthenticationRules | AuthenticationPage> {
+        const result = await this.request<AuthenticationRules>('/authenticationRules', {
+            method: 'GET',
+            credentials: 'include' // Include cookies for authentication
+        });
+        if (!returnPage) return result;
+        if (!authPage)
+            authPage = new AuthenticationPage(result);
+        return authPage;
+    }
 }

frontend/src/css/main.css

@@ -59,3 +59,10 @@
 .nav-item {
     cursor: pointer; padding: 12px 24px; font-size: 1.5em;
 }
+
+.auth-card {
+    margin-left: 30vw;
+    margin-right: 30vw;
+    margin-top: 30vh;
+    margin-bottom: 30vh;
+}

frontend/src/main.ts

@@ -1,12 +1,15 @@
 import { GefestEngine } from "./modules/Gefest/engine";
-import { Navbar } from "./pages/navbar";
+import { Navbar, themeToggle } from "./pages/navbar";
-import { DarkStyle, LightStyle, defaultStyle } from "./styles";
+import { DarkStyle, LightStyle, SupportedStyles } from "./styles";
 import { ControllerAPI } from "./api/RESTful";
 import { NewsFeed } from "./pages/feed/news";
 import { AuthenticationPage } from "./pages/auth/auth";
 
 // I'll add a dark mode toggle later, but for now let's just use the light style by default
-let currentStyle = defaultStyle;
+const defaultStyle = new LightStyle();
+const styleMemLink = {
+    currentStyle: () : SupportedStyles => defaultStyle
+};
 
 { // I hate trash in global scope, so I wrap it in a block
     const appElement = document.getElementById("app");
@@ -20,7 +23,7 @@ const api : ControllerAPI = new ControllerAPI();
 async function authInit() {
     console.log("User is authenticated");
     const newsFeed = await api.getNews(true) as NewsFeed;
-    newsFeed.style = currentStyle;
+    newsFeed.style = styleMemLink.currentStyle;
     const appElement = document.getElementById("app");
     if (appElement)
         appElement.innerHTML = newsFeed.build();
@@ -28,17 +31,35 @@ async function authInit() {
 
 async function logInInit () {
     console.log("User is not authenticated");
-    const authPage = new AuthenticationPage();
+    const authPage = await api.getAuthRules(true) as AuthenticationPage;
-    authPage.style = currentStyle;
+    authPage.style = styleMemLink.currentStyle;
     const appElement = document.getElementById("app");
     if (appElement)
         appElement.innerHTML = authPage.build();
 }
 
+async function changeStyleLogic () {
+    const themes : SupportedStyles[] = [
+        defaultStyle,
+        new DarkStyle()
+    ];
+    let choosed = 0;
+
+    themeToggle.onClick = () => {
+        choosed++;
+        if (choosed >= themes.length)
+            choosed = 0;
+
+        styleMemLink.currentStyle = () => themes[choosed] as SupportedStyles;
+        GefestEngine.render();
+    };
+}
+
 async function main() {
+    await changeStyleLogic();
     // init navbar
     const navbar = new Navbar();
-    navbar.style = currentStyle;
+    navbar.style = styleMemLink.currentStyle;
     document.body.innerHTML = "<div id='app'></div>" + navbar.build();
 
     if (await api.isAuthenticated()) {

frontend/src/modules/Gefest/element.ts

@@ -4,8 +4,9 @@ import { GefestStyle } from './style';
 // The general class of Gefest
 type GefestElementEvents = "onClick";
 export abstract class GefestElement {
-    style: GefestStyle | null = null;
+    style: GefestStyle | (() => GefestStyle) | null = null;
     isHidden: boolean = false;
+    id : string | null = null;
     //onClick: (() => void) | null = null;
     readonly gefestId: string;
     protected content: (GefestElement | string)[] | string;
@@ -64,6 +65,8 @@ export abstract class GefestElement {
      * @returns The created GefestElement.
      */
     static fromHTML(html: string): GefestElement {
+        console.warn("Legacy and experiemental function!");
+
         const htmlElement = new DOMParser().parseFromString(html, 'text/html').body.firstChild as HTMLElement;
         const element = new (class extends GefestElement {
             protected wrapHTML(content: string): string {
@@ -98,7 +101,7 @@ export abstract class GefestElement {
      * Call to GefestEngine for rerender element
     */
     update (): void {
-        GefestEngine.reRenderByGI(this.gefestId);
+        GefestEngine.render(this.gefestId);
     }
 
     /** 
@@ -112,6 +115,11 @@ export abstract class GefestElement {
         else
             this.removeAttribute('hidden');
 
+        if (this.id !== null)
+            this.setAttribute('id', this.id);
+        else
+            this.removeAttribute('id');
+
         if (!isFromStyle)
             return this.applyStyle(this.render(), this);
         return this.render();
@@ -200,8 +208,11 @@ export abstract class GefestElement {
      * @returns The styled HTML.
      */
     protected applyStyle(html: string, element?: GefestElement): string {
-        if (this.style)
+        if (this.style) {
+            if (typeof this.style === "function")
+                return this.style().applyStyle(html, element);
             return this.style.applyStyle(html, element);
+        }
         return html;
     }
 
@@ -222,8 +233,9 @@ export abstract class GefestElement {
      */
     protected wrapHTML (content: string): string {
         const attrString = this.attributesToString();
-        return `<div ${attrString}>${content}</div>`;
+        return `<${this.htmlTag} ${attrString}>${content}</${this.htmlTag}>`;
     }
+    protected htmlTag: string = "div";
 
     /**
      * Renders the element and returns it as a string.
@@ -234,17 +246,23 @@ export abstract class GefestElement {
             return this.wrapHTML(this.content);
         }
         const rendered : string[] = [];
-        for (const item of this.content) {
+        if (!this.isHidden)
-            if (typeof item === 'string') {
+            for (const item of this.content) {
-                rendered.push(item);
+                if (typeof item === 'string') {
-            }
+                    rendered.push(item);
-            else if (item instanceof GefestElement) {
+                }
-                if (!item.style && this.style) {
+                else if (item instanceof GefestElement) {
-                    item.style = this.style;
+                    if (!item.style && this.style !== null) {
+                        if (typeof this.style === "function") {
+                            item.style = this.style;
+                        }
+                        else if (this.style instanceof GefestStyle) {
+                            item.style = () => (this.style as GefestStyle);
+                        }
+                    }
+                    rendered.push(item.build());
                 }
-                rendered.push(item.build());
             }
-        }
         return this.wrapHTML(rendered.join(''));
     }
 }

frontend/src/modules/Gefest/engine.ts

@@ -2,7 +2,7 @@ import { GefestElement } from "./element";
 
 // For protecting the set of elements from direct access
 const elements: Set<GefestElement> = new Set();
-const elementsMapping: Map<string, GefestElement> = new Map<string, GefestElement> ();
+const elementsMapping: Record<string, GefestElement> = {};
 export class GefestEngine {
     static register (element: GefestElement) : string {
         elements.add(element);
@@ -10,8 +10,8 @@ export class GefestEngine {
         let gefestId : string;
         do {
             gefestId = `gefest-${Math.random().toString(36).substr(2, 9)}`;
-        } while(!!elementsMapping.get(gefestId));
+        } while(!!elementsMapping[gefestId]);
-        elementsMapping.set(gefestId, element);
+        elementsMapping[gefestId] = element;
 
         return gefestId;
     }
@@ -31,14 +31,28 @@ export class GefestEngine {
         await GefestEngine.activateOnClick();
     }
 
-    static reRenderByGI (gefestId: string) {
+    static render (gefestId: string | string[] | null = null) {
-        const gefestElement = elementsMapping.get(gefestId);
+        let gefestElements : string[] | null = null;
-        if (!gefestElement) return;
+        if (typeof gefestId === "string")
-        const elementHTML = document.querySelectorAll(`[data-gefest-id="${gefestId}"]`);
+            gefestId = [gefestId];
+        else if (gefestId === null) {
+            gefestId = Object.keys(elementsMapping);
+            gefestElements = gefestId;
+        }
+        //const gefestElement = elementsMapping.get(gefestId);
+        if (!gefestElements)
+            gefestElements = gefestId.filter(gid => !!elementsMapping[gid]);
+        if (gefestElements.length === 0) return;
+        const elementHTML = document.querySelectorAll('[data-gefest-id]');
 
         if (elementHTML.length > 0) {
-            const htmlElement = elementHTML[0] as HTMLElement;
+            for (let htmlElement of elementHTML) {
-            htmlElement.outerHTML = gefestElement.build();
+                const gid = htmlElement.getAttribute("data-gefest-id");
+                if (!gid || !elementsMapping[gid])
+                    continue;
+
+                htmlElement.outerHTML = elementsMapping[gid].build();
+            }
             GefestEngine.activateOnClick();
         }
     }

frontend/src/pages/auth/auth.ts

@@ -1,7 +1,134 @@
+import { GefestElement } from "../../modules/Gefest/element";
+import { GefestA } from "../../modules/Gefest/primitives/a";
+import { GefestCenter } from "../../modules/Gefest/primitives/center";
+import { GefestHeader } from "../../modules/Gefest/primitives/header";
 import { DefaultElement } from "../default-element";
 
-export class AuthenticationPage extends DefaultElement {
+export interface AuthenticationRules {
-    constructor() {
+    type: "password"
-        super([]);
+};
+
+type formType = "text" | "email" | "password" | "textarea";
+function getFormItem (elementHtmlId: string, title: string, type: formType = "text", placeholder : string | null = null): DefaultElement {
+    const label: DefaultElement = new (class extends DefaultElement {
+        constructor() {
+            super([
+                title
+            ]);
+            this.addClass("form-label");
+            this.setAttribute("for", elementHtmlId);
+        }
+        protected htmlTag = "label";
+    });
+    const input: DefaultElement = new (class extends DefaultElement {
+        constructor() {
+            super([]);
+            this.id = elementHtmlId;
+            this.addClass("form-control");
+            if (!{
+                text: true,
+                email: true,
+                password: true,
+                textarea: false
+            }[type]) {
+                this.setAttribute("type", type);
+            }
+            if (placeholder !== null) {
+                this.setAttribute("placeholder", placeholder);
+            }
+        }
+        protected htmlTag = {
+            text: "input",
+            email: "input",
+            password: "input",
+            textarea: "textarea"
+        }[type];
+    });
+
+    return new (class extends DefaultElement { constructor() { super([
+        label, input
+    ]); this.addClass("mb-3"); } });
+}
+class RegisterForm extends DefaultElement {
+    link: GefestA;
+    constructor(authRules : AuthenticationRules) {
+        const header = new GefestHeader("Registration", 2);
+        header.addClass("card-title");
+        const link = new GefestA("Login to account");
+        link.addClass("link-secondary");
+        link.addClass("noselect");
+        link.setPersonalStyle("cursor: pointer;");
+
+        const args = [
+            getFormItem("username", "Username"),
+            getFormItem("password", "Password", "password"),
+        ];
+        switch (authRules.type) {
+            case "password":
+                args.push(getFormItem(
+                    "serverPassword",
+                    "Server Password",
+                    "password"
+                ));
+                break;
+        }
+
+        super([
+            new GefestCenter([header, link]),
+            ...args
+        ]);
+        this.link = link;
+        this.isHidden = true;
+    }
+}
+class LoginForm extends DefaultElement {
+    link: GefestA;
+    constructor() {
+        const header = new GefestHeader("Login", 2);
+        header.addClass("card-title");
+        const link = new GefestA("Create a new account");
+        link.addClass("link-secondary");
+        link.addClass("noselect");
+        link.setPersonalStyle("cursor: pointer;");
+
+        super([
+            new GefestCenter([
+                header, link
+            ]),
+            getFormItem("username", "Username"),
+            getFormItem("password", "Password", "password"),
+        ]);
+        this.link = link;
+    }
+}
+export class AuthenticationPage extends DefaultElement {
+    constructor(authRules : AuthenticationRules) {
+        const login = new LoginForm;
+        const register = new RegisterForm(authRules);
+
+        const update = () => {
+            login.update();
+            register.update();
+        };
+        login.link.onClick = () => {
+            login.isHidden = true;
+            register.isHidden = false;
+            update();
+        };
+        register.link.onClick = () => {
+            login.isHidden = false;
+            register.isHidden = true;
+            update();
+        };
+
+        super([
+            new (class extends DefaultElement { constructor() { super([
+                login,
+                register
+            ]); this.addClass("card-body"); } })
+        ]);
+        this.addClass("card");
+        this.addClass("border");
+        this.addClass("auth-card");
     }
 }

frontend/src/pages/default-element.ts

@@ -2,7 +2,7 @@ import { GefestElement } from "../modules/Gefest/element";
 import { SupportedStyles } from "../styles";
 
 export abstract class DefaultElement extends GefestElement {
-    style: SupportedStyles | null = null;
+    style: SupportedStyles | (() => SupportedStyles) | null = null;
     constructor(content: (GefestElement | string)[] | string) {
         super(content);
     }
@@ -12,3 +12,13 @@ export abstract class DefaultElement extends GefestElement {
         return super.build(isFromStyle);
     }
 }
+
+export class DefaultRoundedButton extends DefaultElement {
+    constructor(btnContent : GefestElement | string) {
+        super([ btnContent ]);
+        this.setAttribute("type", "button");
+        this.addClass("btn");
+        this.addClass("rounded-circle");
+        this.addClass("border");
+    }
+}

frontend/src/pages/feed/news.ts

@@ -28,7 +28,7 @@ class NewsUserInterfaceCard extends DefaultElement {
     }
 }
 // ^^ Card
-class NewsUserInterfaceButton extends DefaultElement {
+class NewsUserInterfaceButton extends DefaultElement {  // <-- TODO: Fix it to DefaultRoundedButton
     constructor(userType : UserType, card : NewsUserInterfaceCard) {
         const uiIcon = new GefestI("");
         uiIcon.addClass({

frontend/src/pages/navbar.ts

@@ -25,6 +25,7 @@ class NavbarButton extends DefaultElement {
         return `<li ${attrString}>${content}</li>`;
     }
 }
+export const themeToggle = new NavbarButton("fas fa-paint-roller");
 
 class NavbarItemContainerUL extends DefaultElement {
     constructor() {
@@ -37,7 +38,9 @@ class NavbarItemContainerUL extends DefaultElement {
 
         super([
             newsButton,
-            chatButton
+            chatButton,
+
+            themeToggle
         ]);
         this.addClass("navbar-nav");
     }

frontend/src/styles.ts

@@ -3,7 +3,7 @@ import { GefestElement } from "./modules/Gefest/element";
 import { Navbar } from "./pages/navbar";
 import { isNewsUI, NewsUserInterface } from "./pages/feed/news";
 
-export abstract class SkeletonStyle extends GefestStyle {
+abstract class SkeletonStyle extends GefestStyle {
     protected abstract navbar(element: GefestElement): void;
     protected abstract newsui(element: GefestElement): void;
     protected abstract styleHandle(element: GefestElement): void;
@@ -65,5 +65,3 @@ export class LightStyle extends SkeletonStyle {
 }
 
 export type SupportedStyles = SkeletonStyle;
-
-export const defaultStyle = new LightStyle();

src/api/index.ts

@@ -1,10 +1,16 @@
 import { Router } from "express";
 import { ApiResponse } from '../utils/rest-api-answer';
-import { NewsItem, getTestNews } from "../utils/news";
+import { getTestNews } from "../utils/news";
 import authRequired from "../utils/auth-required";
+import { NewsItem } from "./models/news";
 
 const router = Router();
 
+router.get('/authenticationRules', (req, res) => {
+    const response = new ApiResponse(req.authenticationRules);
+    return res.json(response.getAnswer());
+});
+
 router.get('/isAuthenticated', (req, res) => {
     const response = new ApiResponse(req.isAuthenticated);
     return res.json(response.getAnswer());

src/api/models/AuthenticationRules.ts

@@ -0,0 +1,3 @@
+export interface AuthenticationRulesTypes {
+    type: "password";
+}

src/api/models/news.ts

@@ -0,0 +1,14 @@
+export interface Source {
+    name: string,
+    icon?: string,
+    sourceURL?: string,
+    itemURL?: string,
+}
+
+export interface NewsItem {
+    id : number;
+    title : string;
+    content : string;
+    source: Source;
+    publishedAt : Date;
+}

src/server.ts

@@ -1,19 +1,22 @@
 import express, { Request, Response } from 'express';
 import api from './api';
 import path from 'path';
+import { AuthenticationRulesTypes } from './api/models/AuthenticationRules';
 
 const app = express();
 const port = 3000;
 
 declare module 'express-serve-static-core' {
     interface Request {
-        isAuthenticated?: boolean;
+        isAuthenticated: boolean;
+        authenticationRules: AuthenticationRulesTypes;
     }
 }
 
 // Checking auth
 app.use((req, res, next) => {
-    req.isAuthenticated = true; // Mock authentication, replace with real logic
+    req.authenticationRules = { type: "password" };
+    req.isAuthenticated = false; // Mock authentication, replace with real logic
     // Add your authentication logic here
     next();
 });

src/utils/news.ts

@@ -1,17 +1,4 @@
-export interface Source {
+import { NewsItem } from "../api/models/news";
-    name: string,
-    icon?: string,
-    sourceURL?: string,
-    itemURL?: string,
-}
-
-export interface NewsItem {
-    id : number;
-    title : string;
-    content : string;
-    source: Source;
-    publishedAt : Date;
-}
 
 export function getTestNews (): NewsItem[] {
     console.warn("Remove getTestNews from production! Only for tests!");