✨ Implements guest access into Login page

src/components/Settings/AuthButtons.vue

@@ -0,0 +1,80 @@
+<template>
+  <div>
+    <!-- If auth configured, show status text -->
+    <span class="user-type-note">{{ makeText() }}</span>
+    <div class="display-options">
+      <!-- If user logged in, show logout button -->
+      <IconLogout
+        v-if="userType == userStateEnum.loggedIn"
+        @click="logout()"
+        v-tooltip="tooltip($t('settings.sign-out-tooltip'))"
+        class="layout-icon" tabindex="-2"
+      />
+      <!-- If not logged in, and gues mode enabled, show login button -->
+      <IconLogout
+        v-if="userType == userStateEnum.guestAccess"
+        @click="goToLogin()"
+        v-tooltip="tooltip('Login')"
+        class="layout-icon" tabindex="-2"
+      />
+    </div>
+  </div>
+</template>
+
+<script>
+import router from '@/router';
+import { logout as registerLogout } from '@/utils/Auth';
+import { localStorageKeys, userStateEnum } from '@/utils/defaults';
+import IconLogout from '@/assets/interface-icons/user-logout.svg';
+
+export default {
+  name: 'AuthButtons',
+  components: {
+    IconLogout,
+  },
+  props: {
+    userType: Number,
+  },
+  data() {
+    return {
+      userStateEnum,
+    };
+  },
+  methods: {
+    logout() {
+      registerLogout();
+      this.$toasted.show(this.$t('login.logout-message'));
+      setTimeout(() => {
+        router.push({ path: '/login' });
+      }, 500);
+    },
+    goToLogin() {
+      router.push({ path: '/login' });
+    },
+    tooltip(content) {
+      return { content, trigger: 'hover focus', delay: 250 };
+    },
+    makeText() {
+      if (this.userType === userStateEnum.loggedIn) return `Hello ${localStorage[localStorageKeys.USERNAME]}!`;
+      if (this.userType === userStateEnum.guestAccess) return 'Log In';
+      return '';
+    },
+  },
+};
+</script>
+
+<style scoped lang="scss">
+@import '@/styles/style-helpers.scss';
+
+span.user-type-note {
+  color: var(--settings-text-color);
+  text-transform: capitalize;
+  margin-right: 0.5rem;
+}
+
+.display-options {
+  @extend .svg-button;
+  color: var(--settings-text-color);
+}
+
+</style>

src/views/Login.vue

@@ -1,6 +1,22 @@
 <template>
   <div class="login-page">
-    <form class="login-form">
+    <!-- User is already logged in -->
+    <div v-if="isUserAlreadyLoggedIn" class="already-logged-in">
+      <h2>Already Logged In</h2>
+      <p class="already-logged-in">
+        You're logged in as <span class="username">{{ existingUsername }}</span>
+      </p>
+      <Button class="login-button" :click="stayLoggedIn">Proceed to Dashboard</Button>
+      <Button class="login-button" :click="getOut">Logout</Button>
+      <span class="already-logged-in-note">
+        You need to log out, in order to proceed as a different user.
+      </span>
+      <transition name="bounce">
+        <p :class="`login-error-message ${status}`" v-show="message">{{ message }}</p>
+      </transition>
+    </div>
+    <!-- Main login form -->
+    <form class="login-form" v-if="(!isUserAlreadyLoggedIn) && isAuthenticationEnabled">
       <h2 class="login-title">{{ $t('login.title') }}</h2>
       <Input
         v-model="username"
@@ -28,6 +44,27 @@
         <p :class="`login-error-message ${status}`" v-show="message">{{ message }}</p>
       </transition>
     </form>
+    <!-- Guest login form -->
+    <form class="guest-form"
+      v-if="appConfig.enableGuestAccess && !isUserAlreadyLoggedIn && isAuthenticationEnabled">
+      <h2 class="login-title">Guest Access</h2>
+      <Button class="login-button" :click="guestLogin">
+        Proceed as Guest
+      </Button>
+      <p class="guest-intro">
+        This instance has guest access enabled.<br>
+        Guests have view-only access to dashboards,
+        so cannot write any changes to disk.
+      </p>
+    </form>
+    <!-- Edge case - guest mode enabled, but no users configured -->
+    <div class="not-configured" v-if="!isAuthenticationEnabled">
+      <h2>Error</h2>
+      <p>Authentication is not enabled, or no users have been configured</p>
+      <Button class="login-button" :click="guestLogin">
+        Go Home
+      </Button>
+    </div>
   </div>
 </template>
 
@@ -36,7 +73,12 @@ 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';
+import {
+  checkCredentials,
+  login,
+  isLoggedIn,
+  logout,
+} from '@/utils/Auth';
 
 export default {
   name: 'login',
@@ -76,6 +118,21 @@ export default {
         successMsg: this.$t('login.success-message'),
       };
     },
+    existingUsername() {
+      return localStorage[localStorageKeys.USERNAME];
+    },
+    isUserAlreadyLoggedIn() {
+      const users = this.appConfig.auth;
+      const loggedIn = (!users || users.length === 0 || isLoggedIn(users));
+      return (loggedIn && this.existingUsername);
+    },
+    isGuestAccessEnabled() {
+      if (!this.appConfig || !this.appConfig.enableGuestAccess) return false;
+      return this.appConfig.enableGuestAccess;
+    },
+    isAuthenticationEnabled() {
+      return (this.appConfig && this.appConfig.auth && this.appConfig.auth.length > 0);
+    },
   },
   methods: {
     /* Checks form is filled in, then initiates the login, and redirects to /home */
@@ -93,10 +150,41 @@ export default {
       this.status = response.correct ? 'success' : 'error';
       if (response.correct) { // Yay, credentials were correct :)
         login(this.username, this.password, timeout); // Login, to set the cookie
+        this.goHome();
+      }
+    },
+    /* Calls function to double-check guest access enabled, then log in as guest */
+    guestLogin() {
+      const isAllowed = this.isGuestAccessEnabled;
+      if (isAllowed) {
+        this.$toasted.show('Logged in as Guest, Redirecting...', { className: 'toast-success' });
+        this.goHome();
+      } else {
+        this.$toasted.show('Guest access not allowed', { className: 'toast-error' });
+      }
+    },
+    /* Calls logout, shows status message, and refreshed page */
+    getOut() {
+      logout();
+      this.status = 'success';
+      this.message = 'Logging out...';
+      this.refreshPage();
+    },
+    /* Logged in user redirects to home page */
+    stayLoggedIn() {
+      this.status = 'success';
+      this.message = 'Redirecting...';
+      this.goHome();
+    },
+    /* Refreshes the page */
+    refreshPage() {
+      setTimeout(() => { location.reload(); }, 250); // eslint-disable-line no-restricted-globals
+    },
+    /* Redirects to the homepage */
+    goHome() {
       setTimeout(() => { // Wait a short while, then redirect back home
         router.push({ path: '/' });
       }, 250);
-      }
     },
     /* Since Theme setter isn't loaded at this point, we must manually get and apply users theme */
     setTheme() {
@@ -119,23 +207,43 @@ export default {
   display: flex;
   align-items: center;
   justify-content: center;
+  justify-content: space-evenly;
   min-height: calc(100vh - var(--footer-height));
 
+  /* User is already logged in note */
+  div.already-logged-in {
+    margin: 0 auto 0.5rem;
+    p.already-logged-in {
+      margin: 0 auto 0.5rem;
+      text-align: center;
+    }
+    span.username {
+      font-weight: bold;
+      text-transform: capitalize;
+    }
+    span.already-logged-in-note {
+      font-size: 0.8rem;
+      opacity: var(--dimming-factor);
+      text-align: left;
+    }
+  }
+
   /* Login form container */
-  form.login-form {
+  form.login-form, form.guest-form, div.already-logged-in, div.not-configured {
     background: var(--login-form-background);
     color: var(--login-form-color);
     border: 1px solid var(--login-form-color);
     border-radius: var(--curve-factor);
     font-size: 1.4rem;
     padding: 2rem;
-    margin: 2rem auto;
+    margin: 2rem;
+    max-width: 22rem;
     display: flex;
     flex-direction: column;
 
     /* Login form title */
-    h2.login-title {
-      font-size: 3rem;
+    h2 {
+      font-size: 2rem;
       margin: 0 0 1rem 0;
       text-align: center;
       cursor: default;
@@ -177,6 +285,11 @@ export default {
       &.success { color: var(--success); }
       &.error { color: var(--warning); }
     }
+    p.guest-intro {
+      font-size: 0.8rem;
+      opacity: var(--dimming-factor);
+      text-align: left;
+    }
   }
 }