From 25ee90b987febff8d3b8c4f78b937c34989a9a65 Mon Sep 17 00:00:00 2001
From: Alicia Sykes <sykes.alicia@gmail.com>
Date: Sun, 13 Jun 2021 09:40:40 +0100
Subject: [PATCH] Adds functionality and supporting components for frontend
 authentication

---
 src/assets/interface-icons/user-logout.svg    |   1 +
 src/components/FormElements/Button.vue        |   1 +
 src/components/Settings/SettingsContainer.vue |  38 +++++
 src/router.js                                 |  38 ++++-
 src/styles/color-palette.scss                 |   3 +
 src/utils/Auth.js                             |  52 +++++++
 src/utils/defaults.js                         |   4 +
 src/views/Login.vue                           | 132 ++++++++++++++++++
 8 files changed, 263 insertions(+), 6 deletions(-)
 create mode 100644 src/assets/interface-icons/user-logout.svg
 create mode 100644 src/utils/Auth.js
 create mode 100644 src/views/Login.vue

diff --git a/src/assets/interface-icons/user-logout.svg b/src/assets/interface-icons/user-logout.svg
new file mode 100644
index 00000000..5c9daff8
--- /dev/null
+++ b/src/assets/interface-icons/user-logout.svg
@@ -0,0 +1 @@
+<svg aria-hidden="true" focusable="false" data-prefix="fas" data-icon="sign-out-alt" class="svg-inline--fa fa-sign-out-alt fa-w-16" role="img" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path fill="currentColor" d="M497 273L329 441c-15 15-41 4.5-41-17v-96H152c-13.3 0-24-10.7-24-24v-96c0-13.3 10.7-24 24-24h136V88c0-21.4 25.9-32 41-17l168 168c9.3 9.4 9.3 24.6 0 34zM192 436v-40c0-6.6-5.4-12-12-12H96c-17.7 0-32-14.3-32-32V160c0-17.7 14.3-32 32-32h84c6.6 0 12-5.4 12-12V76c0-6.6-5.4-12-12-12H96c-53 0-96 43-96 96v192c0 53 43 96 96 96h84c6.6 0 12-5.4 12-12z"></path></svg>
\ No newline at end of file
diff --git a/src/components/FormElements/Button.vue b/src/components/FormElements/Button.vue
index 4ea452d1..58674634 100644
--- a/src/components/FormElements/Button.vue
+++ b/src/components/FormElements/Button.vue
@@ -1,5 +1,6 @@
 <template>
   <button @click="click()">
+    <slot></slot>
     <slot name="text"></slot>
     <slot name="icon"></slot>
   </button>
diff --git a/src/components/Settings/SettingsContainer.vue b/src/components/Settings/SettingsContainer.vue
index 4169d5ea..168e9879 100644
--- a/src/components/Settings/SettingsContainer.vue
+++ b/src/components/Settings/SettingsContainer.vue
@@ -13,6 +13,12 @@
         <ItemSizeSelector :iconSize="iconSize" @iconSizeUpdated="updateIconSize" />
         <ConfigLauncher :sections="sections" :pageInfo="pageInfo" :appConfig="appConfig"
           @modalChanged="modalChanged" />
+        <IconLogout
+          v-if="isUserLoggedIn()"
+          @click="logout()"
+          v-tooltip="'Logout'"
+          class="logout-icon"
+        />
       </div>
       <div :class="`show-hide-container ${settingsVisible? 'hide-btn' : 'show-btn'}`">
         <button @click="toggleSettingsVisibility()"
@@ -34,6 +40,8 @@ import ThemeSelector from '@/components/Settings/ThemeSelector';
 import LayoutSelector from '@/components/Settings/LayoutSelector';
 import ItemSizeSelector from '@/components/Settings/ItemSizeSelector';
 import KeyboardShortcutInfo from '@/components/Settings/KeyboardShortcutInfo';
+import { logout as registerLogout } from '@/utils/Auth';
+import IconLogout from '@/assets/interface-icons/user-logout.svg';
 import IconOpen from '@/assets/interface-icons/config-open-settings.svg';
 import IconClose from '@/assets/interface-icons/config-close.svg';
 
@@ -55,6 +63,7 @@ export default {
     LayoutSelector,
     ItemSizeSelector,
     KeyboardShortcutInfo,
+    IconLogout,
     IconOpen,
     IconClose,
   },
@@ -77,6 +86,16 @@ export default {
     getInitialTheme() {
       return this.appConfig.theme || '';
     },
+    logout() {
+      registerLogout();
+      this.$toasted.show('Logged Out');
+      setTimeout(() => {
+        location.reload(); // eslint-disable-line no-restricted-globals
+      }, 100);
+    },
+    isUserLoggedIn() {
+      return !!localStorage[localStorageKeys.USERNAME];
+    },
     /* Gets user themes if available */
     getUserThemes() {
       const userThemes = this.appConfig.cssThemes || [];
@@ -177,6 +196,25 @@ export default {
     }
   }
 
+    svg.logout-icon {
+      path {
+        fill: var(--settings-text-color);
+      }
+      width: 1rem;
+      height: 1rem;
+      margin: 0.35rem 0.2rem;
+      padding: 0.2rem;
+      text-align: center;
+      background: var(--background);
+      border: 1px solid var(--settings-text-color);;
+      border-radius: var(--curve-factor);
+      cursor: pointer;
+      &:hover, &.selected {
+        background: var(--settings-text-color);
+        path { fill: var(--background); }
+      }
+    }
+
   @include tablet {
     section {
       display: block;
diff --git a/src/router.js b/src/router.js
index 19f75815..968938f4 100644
--- a/src/router.js
+++ b/src/router.js
@@ -1,8 +1,10 @@
 import Vue from 'vue';
 import Router from 'vue-router';
 import Home from './views/Home.vue';
+import Login from './views/Login.vue';
 import conf from '../public/conf.yml'; // Main site configuration
 import { pageInfo as defaultPageInfo, localStorageKeys } from './utils/defaults';
+import { isLoggedIn } from './utils/Auth';
 
 Vue.use(Router);
 
@@ -21,17 +23,24 @@ try {
   localAppConfig = undefined;
 }
 
+const config = {
+  sections: sections || [],
+  pageInfo: localPageInfo || pageInfo || defaultPageInfo,
+  appConfig: localAppConfig || appConfig || {},
+};
+
+const isAuthenticated = () => {
+  const users = config.appConfig.auth;
+  return (!users || isLoggedIn(users));
+};
+
 const router = new Router({
   routes: [
     {
       path: '/',
       name: 'home',
       component: Home,
-      props: {
-        sections: sections || [],
-        pageInfo: localPageInfo || pageInfo || defaultPageInfo,
-        appConfig: localAppConfig || appConfig || {},
-      },
+      props: config,
       meta: {
         title: pageInfo.title || 'Home Page',
         metaTags: [
@@ -42,6 +51,18 @@ const router = new Router({
         ],
       },
     },
+    {
+      path: '/login',
+      name: 'login',
+      component: Login,
+      props: {
+        appConfig: config.appConfig,
+      },
+      beforeEnter: (to, from, next) => {
+        if (isAuthenticated()) router.push({ path: '/' });
+        next();
+      },
+    },
     {
       path: '/about',
       name: 'about',
@@ -50,7 +71,12 @@ const router = new Router({
   ],
 });
 
-const defaultTitle = 'Speed Dial';
+router.beforeEach((to, from, next) => {
+  if (to.name !== 'login' && !isAuthenticated()) next({ name: 'login' });
+  else next();
+});
+
+const defaultTitle = 'Dashy';
 router.afterEach((to) => {
   Vue.nextTick(() => {
     document.title = to.meta.title || defaultTitle;
diff --git a/src/styles/color-palette.scss b/src/styles/color-palette.scss
index 995a12a8..04b32864 100644
--- a/src/styles/color-palette.scss
+++ b/src/styles/color-palette.scss
@@ -79,5 +79,8 @@
   --scroll-bar-background: var(--background-darker);
   --loading-screen-color: var(--primary);
   --loading-screen-background: var(--background);
+  --login-form-color: var(--primary);
+  --login-form-background: var(--background);
+  --login-form-background-secondary: var(--background-darker);
 
 }
diff --git a/src/utils/Auth.js b/src/utils/Auth.js
new file mode 100644
index 00000000..296a3ca9
--- /dev/null
+++ b/src/utils/Auth.js
@@ -0,0 +1,52 @@
+import sha256 from 'crypto-js/sha256';
+import { cookieKeys, localStorageKeys } from './defaults';
+
+const generateUserToken = (user) => sha256(user.toString()).toString().toLowerCase();
+
+export const isLoggedIn = (users) => {
+  const validTokens = users.map((user) => generateUserToken(user));
+  let userAuthenticated = false;
+  document.cookie.split(';').forEach((cookie) => {
+    if (cookie && cookie.split('=').length > 1) {
+      const cookieKey = cookie.split('=')[0].trim();
+      const cookieValue = cookie.split('=')[1].trim();
+      if (cookieKey === cookieKeys.AUTH_TOKEN) {
+        if (validTokens.includes(cookieValue)) {
+          userAuthenticated = true;
+        }
+      }
+    }
+  });
+  return userAuthenticated;
+};
+
+export const checkCredentials = (username, pass, users) => {
+  let response;
+  if (!username) {
+    response = { correct: false, msg: 'Missing Username' };
+  } else if (!pass) {
+    response = { correct: false, msg: 'Missing Password' };
+  } else {
+    users.forEach((user) => {
+      if (user.user === username) {
+        if (user.hash.toLowerCase() === sha256(pass).toString().toLowerCase()) {
+          response = { correct: true, msg: 'Logging in...' };
+        } else {
+          response = { correct: false, msg: 'Incorrect Password' };
+        }
+      }
+    });
+  }
+  return response || { correct: false, msg: 'User not found' };
+};
+
+export const login = (username, pass) => {
+  const userObject = { user: username, hash: sha256(pass).toString().toLowerCase() };
+  document.cookie = `authenticationToken=${generateUserToken(userObject)}; max-age=600`;
+  localStorage.setItem(localStorageKeys.USERNAME, username);
+};
+
+export const logout = () => {
+  document.cookie = 'authenticationToken=null';
+  localStorage.removeItem(localStorageKeys.USERNAME);
+};
diff --git a/src/utils/defaults.js b/src/utils/defaults.js
index b6d28eba..b95351b0 100644
--- a/src/utils/defaults.js
+++ b/src/utils/defaults.js
@@ -54,6 +54,10 @@ module.exports = {
     BACKUP_ID: 'backupId',
     BACKUP_HASH: 'backupHash',
     HIDE_SETTINGS: 'hideSettings',
+    USERNAME: 'username',
+  },
+  cookieKeys: {
+    AUTH_TOKEN: 'authenticationToken',
   },
   modalNames: {
     CONF_EDITOR: 'CONF_EDITOR',
diff --git a/src/views/Login.vue b/src/views/Login.vue
new file mode 100644
index 00000000..56af0979
--- /dev/null
+++ b/src/views/Login.vue
@@ -0,0 +1,132 @@
+<template>
+  <div class="login-page">
+    <form class="login-form">
+      <h2 class="login-title">Dashy</h2>
+      <Input v-model="username" label="Username" class="login-field username" type="text" />
+      <Input v-model="password" label="Password" class="login-field password" type="password" />
+      <Button class="login-button" :click="submitLogin">Login</Button>
+      <transition name="bounce">
+      <p :class="`login-error-message ${status}`" v-show="message">{{ message }}</p>
+      </transition>
+    </form>
+  </div>
+</template>
+
+<script>
+import router from '@/router';
+import Button from '@/components/FormElements/Button';
+import Input from '@/components/FormElements/Input';
+import Defaults, { localStorageKeys } from '@/utils/defaults';
+import { checkCredentials, login } from '@/utils/Auth';
+
+export default {
+  name: 'login',
+  props: {
+    appConfig: Object,
+  },
+  data() {
+    return {
+      username: '',
+      password: '',
+      message: '',
+      status: 'waiting', // wating, error, success
+    };
+  },
+  components: {
+    Button,
+    Input,
+  },
+  methods: {
+    submitLogin() {
+      const response = checkCredentials(this.username, this.password, this.appConfig.auth || []);
+      this.message = response.msg; // Show error or success message to the user
+      this.status = response.correct ? 'success' : 'error';
+      if (response.correct) { // Yay, credentials were correct :)
+        login(this.username, this.password); // Login, to set the cookie
+        setTimeout(() => { // Wait a short while, then redirect back home
+          router.push({ path: '/' });
+        }, 250);
+      }
+    },
+    setTheme() {
+      const theme = localStorage[localStorageKeys.THEME] || Defaults.theme;
+      document.getElementsByTagName('html')[0].setAttribute('data-theme', theme);
+    },
+  },
+  created() {
+    this.setTheme();
+  },
+};
+
+</script>
+
+<style lang="scss">
+
+.login-page {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  min-height: 800px;
+
+  .login-form {
+    background: var(--login-form-background);
+    color: var(--login-form-color);
+    border: 1px solid var(--login-form-color);
+    border-radius: var(--curve-factor);
+    padding: 2rem;
+    margin: 2rem auto;
+    display: flex;
+    flex-direction: column;
+
+    h2.login-title {
+      font-size: 3rem;
+      margin: 0 0 1rem 0;
+      text-align: center;
+    }
+
+    .login-field input, Button.login-button {
+      width: 18rem;
+      margin: 0.5rem auto;
+      font-size: 1.4rem;
+      padding: 0.5rem 1rem;
+    }
+
+    .login-field input {
+      color: var(--login-form-color);
+      border-color: var(--login-form-background-secondary);
+      background: var(--login-form-background-secondary);
+      &:focus {
+
+      }
+    }
+    Button.login-button {
+      background: var(--login-form-background-secondary);
+      border-color: var(--login-form-background-secondary);
+      &:hover {
+        border-color: var(--login-form-color);
+        color: var(--login-form-background-secondary);
+        background: var(--login-form-color);
+      }
+      &:active, &:focus {
+        box-shadow: 1px 1px 6px var(--login-form-color);
+      }
+    }
+    p.login-error-message {
+      font-size: 1rem;
+      text-align: center;
+      &.waiting { color: var(--login-form-color); }
+      &.success { color: var(--success); }
+      &.error { color: var(--warning); }
+    }
+  }
+}
+
+.bounce-enter-active { animation: bounce-in 0.25s; }
+.bounce-leave-active { animation: bounce-in 0.25s reverse; }
+@keyframes bounce-in {
+  0% { transform: scale(0); }
+  50% { transform: scale(1.25); }
+  100% { transform: scale(1); }
+}
+
+</style>