feat: Guest email authentication (#1088)

* feat: API endpoints for email signin

* fix: After testing

* Initial signin flow working

* move shared middleware

* feat: Add guest signin toggle, obey on endpoints

* feat: Basic email signin when enabled

* Improve guest signin email
Disable double signin with JWT

* fix: Simple rate limiting

* create placeholder users in db

* fix: Give invited users default avatar
add invited users to people settings

* test

* add transaction

* tmp: test CI

* derp

* md5

* urgh

* again

* test: pass

* test

* fix: Remove usage of data values

* guest signin page

* Visually separator 'Invited' from other people tabs

* fix: Edge case attempting SSO signin for guest email account

* fix: Correctly set email auth method to cookie

* Improve rate limit error display

* lint: cleanup / comments

* Improve invalid token error display

* style tweaks

* pass guest value to subdomain

* Restore copy link option

* feat: Allow invite revoke from people management

* fix: Incorrect users email schema does not allow for user deletion

* lint

* fix: avatarUrl for deleted user failure

* change default to off for guest invites

* fix: Changing security settings wipes subdomain

* fix: user delete permissioning

* test: Add user.invite specs

app/components/Checkbox.js

@@ -2,10 +2,12 @@
 import * as React from 'react';
 import styled from 'styled-components';
 import HelpText from 'components/HelpText';
+import VisuallyHidden from 'components/VisuallyHidden';
 
 export type Props = {
   checked?: boolean,
   label?: string,
+  labelHidden?: boolean,
   className?: string,
   note?: string,
   small?: boolean,
@@ -30,18 +32,26 @@ const Label = styled.label`
 
 export default function Checkbox({
   label,
+  labelHidden,
   note,
   className,
   small,
   short,
   ...rest
 }: Props) {
+  const wrappedLabel = <LabelText small={small}>{label}</LabelText>;
+
   return (
     <React.Fragment>
       <Wrapper small={small}>
         <Label>
           <input type="checkbox" {...rest} />
-          {label && <LabelText small={small}>{label}</LabelText>}
+          {label &&
+            (labelHidden ? (
+              <VisuallyHidden>{wrappedLabel}</VisuallyHidden>
+            ) : (
+              wrappedLabel
+            ))}
         </Label>
         {note && <HelpText small>{note}</HelpText>}
       </Wrapper>

app/components/Tabs.js

@@ -7,4 +7,12 @@ const Tabs = styled.nav`
   margin-bottom: 12px;
 `;
 
+export const Separator = styled.span`
+  border-left: 1px solid ${props => props.theme.divider};
+  position: relative;
+  top: 2px;
+  margin-right: 24px;
+  margin-top: 6px;
+`;
+
 export default Tabs;

app/menus/UserMenu.js

@@ -42,7 +42,7 @@ class UserMenu extends React.Component<Props> {
     const { user, users } = this.props;
     if (
       !window.confirm(
-        "Are you want to suspend this account? Suspended users won't be able to access Outline."
+        'Are you want to suspend this account? Suspended users will be prevented from logging in.'
       )
     ) {
       return;
@@ -50,6 +50,12 @@ class UserMenu extends React.Component<Props> {
     users.suspend(user);
   };
 
+  handleRevoke = (ev: SyntheticEvent<>) => {
+    ev.preventDefault();
+    const { user, users } = this.props;
+    users.delete(user, { confirmation: true });
+  };
+
   handleActivate = (ev: SyntheticEvent<>) => {
     ev.preventDefault();
     const { user, users } = this.props;
@@ -71,7 +77,13 @@ class UserMenu extends React.Component<Props> {
               Make {user.name} an admin…
             </DropdownMenuItem>
           ))}
-        {user.isSuspended ? (
+        {!user.lastActiveAt && (
+          <DropdownMenuItem onClick={this.handleRevoke}>
+            Revoke invite…
+          </DropdownMenuItem>
+        )}
+        {user.lastActiveAt &&
+          (user.isSuspended ? (
             <DropdownMenuItem onClick={this.handleActivate}>
               Activate account
             </DropdownMenuItem>
@@ -79,7 +91,7 @@ class UserMenu extends React.Component<Props> {
             <DropdownMenuItem onClick={this.handleSuspend}>
               Suspend account…
             </DropdownMenuItem>
-        )}
+          ))}
       </DropdownMenu>
     );
   }

app/models/Team.js

@@ -1,4 +1,5 @@
 // @flow
+import { computed } from 'mobx';
 import BaseModel from './BaseModel';
 
 class Team extends BaseModel {
@@ -9,8 +10,18 @@ class Team extends BaseModel {
   googleConnected: boolean;
   sharing: boolean;
   documentEmbeds: boolean;
+  guestSignin: boolean;
   subdomain: ?string;
   url: string;
+
+  @computed
+  get signinMethods(): string {
+    if (this.slackConnected && this.googleConnected) {
+      return 'Slack or Google';
+    }
+    if (this.slackConnected) return 'Slack';
+    return 'Google';
+  }
 }
 
 export default Team;

app/scenes/Invite.js

@@ -1,14 +1,15 @@
 // @flow
 import * as React from 'react';
-import { withRouter, type RouterHistory } from 'react-router-dom';
+import { Link, withRouter, type RouterHistory } from 'react-router-dom';
 import { observable } from 'mobx';
 import { inject, observer } from 'mobx-react';
 import { CloseIcon } from 'outline-icons';
 import styled from 'styled-components';
 import Flex from 'shared/components/Flex';
-import CopyToClipboard from 'components/CopyToClipboard';
 import Button from 'components/Button';
 import Input from 'components/Input';
+import CopyToClipboard from 'components/CopyToClipboard';
+import Checkbox from 'components/Checkbox';
 import HelpText from 'components/HelpText';
 import Tooltip from 'components/Tooltip';
 import NudeButton from 'components/NudeButton';
@@ -16,6 +17,7 @@ import NudeButton from 'components/NudeButton';
 import UiStore from 'stores/UiStore';
 import AuthStore from 'stores/AuthStore';
 import UsersStore from 'stores/UsersStore';
+import PoliciesStore from 'stores/PoliciesStore';
 
 const MAX_INVITES = 20;
 
@@ -23,6 +25,7 @@ type Props = {
   auth: AuthStore,
   users: UsersStore,
   history: RouterHistory,
+  policies: PoliciesStore,
   ui: UiStore,
   onSubmit: () => void,
 };
@@ -32,10 +35,10 @@ class Invite extends React.Component<Props> {
   @observable isSaving: boolean;
   @observable linkCopied: boolean = false;
   @observable
-  invites: { email: string, name: string }[] = [
+  invites: { email: string, name: string, guest: boolean }[] = [
-    { email: '', name: '' },
+    { email: '', name: '', guest: false },
-    { email: '', name: '' },
+    { email: '', name: '', guest: false },
-    { email: '', name: '' },
+    { email: '', name: '', guest: false },
   ];
 
   handleSubmit = async (ev: SyntheticEvent<>) => {
@@ -57,6 +60,10 @@ class Invite extends React.Component<Props> {
     this.invites[index][ev.target.name] = ev.target.value;
   };
 
+  handleGuestChange = (ev, index) => {
+    this.invites[index][ev.target.name] = ev.target.checked;
+  };
+
   handleAdd = () => {
     if (this.invites.length >= MAX_INVITES) {
       this.props.ui.showToast(
@@ -64,10 +71,11 @@ class Invite extends React.Component<Props> {
       );
     }
 
-    this.invites.push({ email: '', name: '' });
+    this.invites.push({ email: '', name: '', guest: false });
   };
 
-  handleRemove = (index: number) => {
+  handleRemove = (ev: SyntheticEvent<>, index: number) => {
+    ev.preventDefault();
     this.invites.splice(index, 1);
   };
 
@@ -81,23 +89,40 @@ class Invite extends React.Component<Props> {
     if (!team || !user) return null;
 
     const predictedDomain = user.email.split('@')[1];
+    const can = this.props.policies.abilities(team.id);
 
     return (
       <form onSubmit={this.handleSubmit}>
+        {team.guestSignin ? (
           <HelpText>
-          Send invites to your team members to get them kick started. Currently,
+            Invite team members or guests to join your knowledge base. Team
-          they must be able to sign in with your team{' '}
+            members can sign in with {team.signinMethods} and guests can use
-          {team.slackConnected ? 'Slack' : 'Google'} account to be able to join
+            their email address.
-          Outline.
           </HelpText>
+        ) : (
+          <HelpText>
+            Invite team members to join your knowledge base. They will need to
+            sign in with {team.signinMethods}.{' '}
+            {can.update && (
+              <React.Fragment>
+                As an admin you can also{' '}
+                <Link to="/settings/security">enable guest invites</Link>.
+              </React.Fragment>
+            )}
+          </HelpText>
+        )}
         {team.subdomain && (
-          <HelpText>
+          <CopyBlock>
-            You can also{' '}
+            Want a link to share directly with your team?
+            <Flex>
+              <Input type="text" value={team.url} flex />&nbsp;&nbsp;
               <CopyToClipboard text={team.url} onCopy={this.handleCopy}>
-              <a>{this.linkCopied ? 'link copied' : 'copy a link'}</a>
+                <Button type="button" neutral>
-            </CopyToClipboard>{' '}
+                  {this.linkCopied ? 'Link copied' : 'Copy link'}
-            to your teams signin page.
+                </Button>
-          </HelpText>
+              </CopyToClipboard>
+            </Flex>
+          </CopyBlock>
         )}
         {this.invites.map((invite, index) => (
           <Flex key={index}>
@@ -109,6 +134,7 @@ class Invite extends React.Component<Props> {
               onChange={ev => this.handleChange(ev, index)}
               placeholder={`example@${predictedDomain}`}
               value={invite.email}
+              required={index === 0}
               autoFocus={index === 0}
               flex
             />
@@ -123,10 +149,33 @@ class Invite extends React.Component<Props> {
               required={!!invite.email}
               flex
             />
+            {team.guestSignin && (
+              <React.Fragment>
+                &nbsp;&nbsp;
+                <Tooltip
+                  tooltip={
+                    <span>
+                      Guests can sign in with email and <br />do not require{' '}
+                      {team.signinMethods} accounts
+                    </span>
+                  }
+                  placement="top"
+                >
+                  <Guest>
+                    <Checkbox
+                      name="guest"
+                      label="Guest"
+                      onChange={ev => this.handleGuestChange(ev, index)}
+                      checked={invite.guest}
+                    />
+                  </Guest>
+                </Tooltip>
+              </React.Fragment>
+            )}
             {index !== 0 && (
               <Remove>
                 <Tooltip tooltip="Remove invite" placement="top">
-                  <NudeButton onClick={() => this.handleRemove(index)}>
+                  <NudeButton onClick={ev => this.handleRemove(ev, index)}>
                     <CloseIcon />
                   </NudeButton>
                 </Tooltip>
@@ -160,10 +209,29 @@ class Invite extends React.Component<Props> {
   }
 }
 
+const CopyBlock = styled('div')`
+  font-size: 14px;
+  background: ${props => props.theme.secondaryBackground};
+  padding: 8px 16px 4px;
+  border-radius: 8px;
+  margin-bottom: 24px;
+
+  input {
+    background: ${props => props.theme.background};
+    border-radius: 4px;
+  }
+`;
+
+const Guest = styled('div')`
+  padding-top: 4px;
+  margin: 0 4px 16px;
+  align-self: flex-end;
+`;
+
 const Remove = styled('div')`
   margin-top: 6px;
   position: absolute;
   right: -32px;
 `;
 
-export default inject('auth', 'users', 'ui')(withRouter(Invite));
+export default inject('auth', 'users', 'policies', 'ui')(withRouter(Invite));

app/scenes/Settings/People.js

@@ -5,8 +5,6 @@ import { observable } from 'mobx';
 import { observer, inject } from 'mobx-react';
 import { PlusIcon } from 'outline-icons';
 
-import AuthStore from 'stores/AuthStore';
-import UsersStore from 'stores/UsersStore';
 import Empty from 'components/Empty';
 import { ListPlaceholder } from 'components/LoadingPlaceholder';
 import Modal from 'components/Modal';
@@ -17,12 +15,17 @@ import PageTitle from 'components/PageTitle';
 import HelpText from 'components/HelpText';
 import UserListItem from './components/UserListItem';
 import List from 'components/List';
-import Tabs from 'components/Tabs';
+import Tabs, { Separator } from 'components/Tabs';
 import Tab from 'components/Tab';
 
+import AuthStore from 'stores/AuthStore';
+import UsersStore from 'stores/UsersStore';
+import PoliciesStore from 'stores/PoliciesStore';
+
 type Props = {
   auth: AuthStore,
   users: UsersStore,
+  policies: PoliciesStore,
   match: Object,
 };
 
@@ -43,22 +46,27 @@ class People extends React.Component<Props> {
   };
 
   render() {
-    const { auth, match } = this.props;
+    const { auth, policies, match } = this.props;
     const { filter } = match.params;
     const currentUser = auth.user;
+    const team = auth.team;
     invariant(currentUser, 'User should exist');
+    invariant(team, 'Team should exist');
 
     let users = this.props.users.active;
     if (filter === 'all') {
-      users = this.props.users.orderedData;
+      users = this.props.users.all;
     } else if (filter === 'admins') {
       users = this.props.users.admins;
     } else if (filter === 'suspended') {
       users = this.props.users.suspended;
+    } else if (filter === 'invited') {
+      users = this.props.users.invited;
     }
 
     const showLoading = this.props.users.isFetching && !users.length;
     const showEmpty = this.props.users.isLoaded && !users.length;
+    const can = policies.abilities(team.id);
 
     return (
       <CenteredContent>
@@ -66,8 +74,8 @@ class People extends React.Component<Props> {
         <h1>People</h1>
         <HelpText>
           Everyone that has signed into Outline appears here. It’s possible that
-          there are other users who have access through Single Sign-On but
+          there are other users who have access through {team.signinMethods} but
-          haven’t signed into Outline yet.
+          haven’t signed in yet.
         </HelpText>
         <Button
           type="button"
@@ -88,7 +96,7 @@ class People extends React.Component<Props> {
           <Tab to="/settings/people/admins" exact>
             Admins
           </Tab>
-          {currentUser.isAdmin && (
+          {can.update && (
             <Tab to="/settings/people/suspended" exact>
               Suspended
             </Tab>
@@ -96,13 +104,22 @@ class People extends React.Component<Props> {
           <Tab to="/settings/people/all" exact>
             Everyone
           </Tab>
+
+          {can.invite && (
+            <React.Fragment>
+              <Separator />
+              <Tab to="/settings/people/invited" exact>
+                Invited
+              </Tab>
+            </React.Fragment>
+          )}
         </Tabs>
         <List>
           {users.map(user => (
             <UserListItem
               key={user.id}
               user={user}
-              showMenu={!!currentUser.isAdmin && currentUser.id !== user.id}
+              showMenu={can.update && currentUser.id !== user.id}
             />
           ))}
         </List>
@@ -121,4 +138,4 @@ class People extends React.Component<Props> {
   }
 }
 
-export default inject('auth', 'users')(People);
+export default inject('auth', 'users', 'policies')(People);

app/scenes/Settings/Security.js

@@ -22,11 +22,13 @@ class Security extends React.Component<Props> {
 
   @observable sharing: boolean;
   @observable documentEmbeds: boolean;
+  @observable guestSignin: boolean;
 
   componentDidMount() {
     const { auth } = this.props;
     if (auth.team) {
       this.documentEmbeds = auth.team.documentEmbeds;
+      this.guestSignin = auth.team.guestSignin;
       this.sharing = auth.team.sharing;
     }
   }
@@ -39,12 +41,16 @@ class Security extends React.Component<Props> {
       case 'documentEmbeds':
         this.documentEmbeds = ev.target.checked;
         break;
+      case 'guestSignin':
+        this.guestSignin = ev.target.checked;
+        break;
       default:
     }
 
     await this.props.auth.updateTeam({
       sharing: this.sharing,
       documentEmbeds: this.documentEmbeds,
+      guestSignin: this.guestSignin,
     });
     this.showSuccessMessage();
   };
@@ -54,6 +60,8 @@ class Security extends React.Component<Props> {
   }, 500);
 
   render() {
+    const { team } = this.props.auth;
+
     return (
       <CenteredContent>
         <PageTitle title="Security" />
@@ -63,6 +71,15 @@ class Security extends React.Component<Props> {
           knowledgebase.
         </HelpText>
 
+        <Checkbox
+          label="Allow guest invites"
+          name="guestSignin"
+          checked={this.guestSignin}
+          onChange={this.handleChange}
+          note={`When enabled guests can be invited by email address and are able to signin without ${
+            team ? team.signinMethods : 'SSO'
+          }`}
+        />
         <Checkbox
           label="Public document sharing"
           name="sharing"

app/scenes/Settings/components/UserListItem.js

@@ -51,7 +51,13 @@ class UserListItem extends React.Component<Props> {
         subtitle={
           <React.Fragment>
             {user.email ? `${user.email} · ` : undefined}
+            {user.lastActiveAt ? (
+              <React.Fragment>
                 Active <Time dateTime={user.lastActiveAt} /> ago
+              </React.Fragment>
+            ) : (
+              'Pending'
+            )}
             {user.isAdmin && <Badge admin={user.isAdmin}>Admin</Badge>}
             {user.isSuspended && <Badge>Suspended</Badge>}
           </React.Fragment>

app/stores/AuthStore.js

@@ -29,8 +29,8 @@ export default class AuthStore {
     }
 
     this.rootStore = rootStore;
-    this.user = data.user;
+    this.user = new User(data.user);
-    this.team = data.team;
+    this.team = new Team(data.team);
     this.token = getCookie('accessToken');
 
     if (this.token) setImmediate(() => this.fetch());
@@ -72,8 +72,8 @@ export default class AuthStore {
       runInAction('AuthStore#fetch', () => {
         this.addPolicies(res.policies);
         const { user, team } = res.data;
-        this.user = user;
+        this.user = new User(user);
-        this.team = team;
+        this.team = new Team(team);
 
         if (window.Bugsnag) {
           Bugsnag.user = {
@@ -141,7 +141,7 @@ export default class AuthStore {
 
       runInAction('AuthStore#updateTeam', () => {
         this.addPolicies(res.policies);
-        this.team = res.data;
+        this.team = new Team(res.data);
       });
     } finally {
       this.isSaving = false;

app/stores/BaseStore.js

@@ -114,14 +114,17 @@ export default class BaseStore<T: BaseModel> {
   }
 
   @action
-  async delete(item: T) {
+  async delete(item: T, options?: Object = {}) {
     if (!this.actions.includes('delete')) {
       throw new Error(`Cannot delete ${this.modelName}`);
     }
     this.isSaving = true;
 
     try {
-      await client.post(`/${this.modelName}s.delete`, { id: item.id });
+      await client.post(`/${this.modelName}s.delete`, {
+        id: item.id,
+        ...options,
+      });
       return this.remove(item.id);
     } finally {
       this.isSaving = false;

app/stores/UsersStore.js

@@ -14,7 +14,10 @@ export default class UsersStore extends BaseStore<User> {
 
   @computed
   get active(): User[] {
-    return filter(this.orderedData, user => !user.isSuspended);
+    return filter(
+      this.orderedData,
+      user => !user.isSuspended && user.lastActiveAt
+    );
   }
 
   @computed
@@ -22,11 +25,21 @@ export default class UsersStore extends BaseStore<User> {
     return filter(this.orderedData, user => user.isSuspended);
   }
 
+  @computed
+  get invited(): User[] {
+    return filter(this.orderedData, user => !user.lastActiveAt);
+  }
+
   @computed
   get admins(): User[] {
     return filter(this.orderedData, user => user.isAdmin);
   }
 
+  @computed
+  get all(): User[] {
+    return filter(this.orderedData, user => user.lastActiveAt);
+  }
+
   @computed
   get orderedData(): User[] {
     return orderBy(Array.from(this.data.values()), 'name', 'asc');

server/api/__snapshots__/users.test.js.snap

@@ -3,7 +3,7 @@
 exports[`#users.activate should activate a suspended user 1`] = `
 Object {
   "data": Object {
-    "avatarUrl": "http://example.com/avatar.png",
+    "avatarUrl": "https://tiley.herokuapp.com/avatar/111d68d06e2d317b5a59c2c6c5bad808/U.png",
     "createdAt": "2018-01-02T00:00:00.000Z",
     "email": "user1@example.com",
     "id": "46fde1d4-0050-428f-9f0b-0bf77f4bdf61",
@@ -38,7 +38,7 @@ Object {
 exports[`#users.demote should demote an admin 1`] = `
 Object {
   "data": Object {
-    "avatarUrl": "http://example.com/avatar.png",
+    "avatarUrl": "https://tiley.herokuapp.com/avatar/111d68d06e2d317b5a59c2c6c5bad808/U.png",
     "createdAt": "2018-01-02T00:00:00.000Z",
     "email": "user1@example.com",
     "id": "46fde1d4-0050-428f-9f0b-0bf77f4bdf61",
@@ -52,6 +52,15 @@ Object {
 }
 `;
 
+exports[`#users.demote should not demote admins if only one available 1`] = `
+Object {
+  "error": "validation_error",
+  "message": "At least one admin is required",
+  "ok": false,
+  "status": 400,
+}
+`;
+
 exports[`#users.demote should require admin 1`] = `
 Object {
   "error": "admin_required",
@@ -61,19 +70,10 @@ Object {
 }
 `;
 
-exports[`#users.demote shouldn't demote admins if only one available  1`] = `
-Object {
-  "error": "validation_error",
-  "message": "At least one admin is required",
-  "ok": false,
-  "status": 400,
-}
-`;
-
 exports[`#users.promote should promote a new admin 1`] = `
 Object {
   "data": Object {
-    "avatarUrl": "http://example.com/avatar.png",
+    "avatarUrl": "https://tiley.herokuapp.com/avatar/111d68d06e2d317b5a59c2c6c5bad808/U.png",
     "createdAt": "2018-01-02T00:00:00.000Z",
     "email": "user1@example.com",
     "id": "46fde1d4-0050-428f-9f0b-0bf77f4bdf61",
@@ -96,6 +96,15 @@ Object {
 }
 `;
 
+exports[`#users.suspend should not allow suspending the user themselves 1`] = `
+Object {
+  "error": "validation_error",
+  "message": "Unable to suspend the current user",
+  "ok": false,
+  "status": 400,
+}
+`;
+
 exports[`#users.suspend should require admin 1`] = `
 Object {
   "error": "admin_required",
@@ -108,7 +117,7 @@ Object {
 exports[`#users.suspend should suspend an user 1`] = `
 Object {
   "data": Object {
-    "avatarUrl": "http://example.com/avatar.png",
+    "avatarUrl": "https://tiley.herokuapp.com/avatar/111d68d06e2d317b5a59c2c6c5bad808/U.png",
     "createdAt": "2018-01-02T00:00:00.000Z",
     "email": "user1@example.com",
     "id": "46fde1d4-0050-428f-9f0b-0bf77f4bdf61",
@@ -122,15 +131,6 @@ Object {
 }
 `;
 
-exports[`#users.suspend shouldn't allow suspending the user themselves 1`] = `
-Object {
-  "error": "validation_error",
-  "message": "Unable to suspend the current user",
-  "ok": false,
-  "status": 400,
-}
-`;
-
 exports[`#users.update should require authentication 1`] = `
 Object {
   "error": "authentication_required",

server/api/events.test.js

@@ -56,6 +56,7 @@ describe('#events.list', async () => {
     const res = await server.post('/api/events.list', {
       body: { token: admin.getJwtToken() },
     });
+
     const body = await res.json();
 
     expect(res.status).toEqual(200);

server/api/index.js

@@ -18,9 +18,9 @@ import notificationSettings from './notificationSettings';
 import utils from './utils';
 
 import { NotFoundError } from '../errors';
-import errorHandling from './middlewares/errorHandling';
+import errorHandling from '../middlewares/errorHandling';
 import validation from '../middlewares/validation';
-import methodOverride from './middlewares/methodOverride';
+import methodOverride from '../middlewares/methodOverride';
 import cache from './middlewares/cache';
 import apiWrapper from './middlewares/apiWrapper';
 

server/api/team.js

@@ -11,20 +11,28 @@ const { authorize } = policy;
 const router = new Router();
 
 router.post('team.update', auth(), async ctx => {
-  const { name, avatarUrl, subdomain, sharing, documentEmbeds } = ctx.body;
+  const {
+    name,
+    avatarUrl,
+    subdomain,
+    sharing,
+    guestSignin,
+    documentEmbeds,
+  } = ctx.body;
   const endpoint = publicS3Endpoint();
 
   const user = ctx.state.user;
   const team = await Team.findByPk(user.teamId);
   authorize(user, 'update', team);
 
-  if (process.env.SUBDOMAINS_ENABLED === 'true') {
+  if (subdomain !== undefined && process.env.SUBDOMAINS_ENABLED === 'true') {
     team.subdomain = subdomain === '' ? null : subdomain;
   }
 
   if (name) team.name = name;
   if (sharing !== undefined) team.sharing = sharing;
   if (documentEmbeds !== undefined) team.documentEmbeds = documentEmbeds;
+  if (guestSignin !== undefined) team.guestSignin = guestSignin;
   if (avatarUrl && avatarUrl.startsWith(`${endpoint}/uploads/${user.id}`)) {
     team.avatarUrl = avatarUrl;
   }

server/api/users.js

@@ -254,11 +254,12 @@ router.post('users.invite', auth(), async ctx => {
 });
 
 router.post('users.delete', auth(), async ctx => {
-  const { confirmation } = ctx.body;
+  const { confirmation, id } = ctx.body;
   ctx.assertPresent(confirmation, 'confirmation is required');
 
-  const user = ctx.state.user;
+  let user = ctx.state.user;
-  authorize(user, 'delete', user);
+  if (id) user = await User.findByPk(id);
+  authorize(ctx.state.user, 'delete', user);
 
   try {
     await user.destroy();

server/api/users.test.js

@@ -76,6 +76,26 @@ describe('#users.info', async () => {
   });
 });
 
+describe('#users.invite', async () => {
+  it('should return sent invites', async () => {
+    const user = await buildUser();
+    const res = await server.post('/api/users.invite', {
+      body: {
+        token: user.getJwtToken(),
+        invites: [{ email: 'test@example.com', name: 'Test', guest: false }],
+      },
+    });
+    const body = await res.json();
+    expect(res.status).toEqual(200);
+    expect(body.data.sent.length).toEqual(1);
+  });
+
+  it('should require authentication', async () => {
+    const res = await server.post('/api/users.invite');
+    expect(res.status).toEqual(401);
+  });
+});
+
 describe('#users.delete', async () => {
   it('should not allow deleting without confirmation', async () => {
     const user = await buildUser();
@@ -111,6 +131,27 @@ describe('#users.delete', async () => {
     expect(res.status).toEqual(200);
   });
 
+  it('should allow deleting pending user account with admin', async () => {
+    const user = await buildUser({ isAdmin: true });
+    const pending = await buildUser({
+      teamId: user.teamId,
+      lastActiveAt: null,
+    });
+    const res = await server.post('/api/users.delete', {
+      body: { token: user.getJwtToken(), id: pending.id, confirmation: true },
+    });
+    expect(res.status).toEqual(200);
+  });
+
+  it('should not allow deleting another user account', async () => {
+    const user = await buildUser({ isAdmin: true });
+    const user2 = await buildUser({ teamId: user.teamId });
+    const res = await server.post('/api/users.delete', {
+      body: { token: user.getJwtToken(), id: user2.id, confirmation: true },
+    });
+    expect(res.status).toEqual(403);
+  });
+
   it('should require authentication', async () => {
     const res = await server.post('/api/users.delete');
     const body = await res.json();
@@ -183,7 +224,7 @@ describe('#users.demote', async () => {
     expect(body).toMatchSnapshot();
   });
 
-  it("shouldn't demote admins if only one available ", async () => {
+  it('should not demote admins if only one available', async () => {
     const admin = await buildUser({ isAdmin: true });
 
     const res = await server.post('/api/users.demote', {
@@ -226,7 +267,7 @@ describe('#users.suspend', async () => {
     expect(body).toMatchSnapshot();
   });
 
-  it("shouldn't allow suspending the user themselves", async () => {
+  it('should not allow suspending the user themselves', async () => {
     const admin = await buildUser({ isAdmin: true });
     const res = await server.post('/api/users.suspend', {
       body: {

server/auth/email.js

@@ -0,0 +1,91 @@
+// @flow
+import Router from 'koa-router';
+import mailer from '../mailer';
+import subMinutes from 'date-fns/sub_minutes';
+import { getUserForEmailSigninToken } from '../utils/jwt';
+import { User, Team } from '../models';
+import methodOverride from '../middlewares/methodOverride';
+import validation from '../middlewares/validation';
+import auth from '../middlewares/authentication';
+import { AuthorizationError } from '../errors';
+
+const router = new Router();
+
+router.use(methodOverride());
+router.use(validation());
+
+router.post('email', async ctx => {
+  const { email } = ctx.body;
+
+  ctx.assertEmail(email, 'email is required');
+
+  const user = await User.findOne({
+    where: { email },
+  });
+
+  if (user) {
+    const team = await Team.findByPk(user.teamId);
+
+    // If the user matches an email address associated with an SSO
+    // signin then just forward them directly to that service's
+    // login page
+    if (user.service && user.service !== 'email') {
+      return ctx.redirect(`${team.url}/auth/${user.service}`);
+    }
+
+    if (!team.guestSignin) {
+      throw new AuthorizationError();
+    }
+
+    // basic rate limit of endpoint to prevent send email abuse
+    if (
+      user.lastSigninEmailSentAt &&
+      user.lastSigninEmailSentAt > subMinutes(new Date(), 2)
+    ) {
+      ctx.redirect(`${team.url}?notice=email-auth-ratelimit`);
+      return;
+    }
+
+    // send email to users registered address with a short-lived token
+    mailer.signin({
+      to: user.email,
+      token: user.getEmailSigninToken(),
+      teamUrl: team.url,
+    });
+
+    user.lastSigninEmailSentAt = new Date();
+    await user.save();
+
+    // respond with success regardless of whether an email was sent
+    ctx.redirect(`${team.url}?notice=guest-success`);
+  } else {
+    ctx.redirect(`${process.env.URL}?notice=guest-success`);
+  }
+});
+
+router.get('email.callback', auth({ required: false }), async ctx => {
+  const { token } = ctx.request.query;
+
+  ctx.assertPresent(token, 'token is required');
+
+  try {
+    const user = await getUserForEmailSigninToken(token);
+
+    const team = await Team.findByPk(user.teamId);
+    if (!team.guestSignin) {
+      throw new AuthorizationError();
+    }
+
+    if (!user.service) {
+      user.service = 'email';
+      await user.save();
+    }
+
+    // set cookies on response and redirect to team subdomain
+    ctx.signIn(user, team, 'email', false);
+  } catch (err) {
+    ctx.redirect(`${process.env.URL}?notice=expired-token`);
+  }
+});
+
+export default router;

server/auth/google.js

@@ -1,4 +1,5 @@
 // @flow
+import Sequelize from 'sequelize';
 import crypto from 'crypto';
 import Router from 'koa-router';
 import { capitalize } from 'lodash';
@@ -6,6 +7,8 @@ import { OAuth2Client } from 'google-auth-library';
 import { User, Team, Event } from '../models';
 import auth from '../middlewares/authentication';
 
+const Op = Sequelize.Op;
+
 const router = new Router();
 const client = new OAuth2Client(
   process.env.GOOGLE_CLIENT_ID,
@@ -77,10 +80,18 @@ router.get('google.callback', auth({ required: false }), async ctx => {
     },
   });
 
+  try {
     const [user, isFirstSignin] = await User.findOrCreate({
       where: {
+        [Op.or]: [
+          {
             service: 'google',
             serviceId: profile.data.id,
+          },
+          {
+            service: '',
+          },
+        ],
         teamId: team.id,
       },
       defaults: {
@@ -117,6 +128,27 @@ router.get('google.callback', auth({ required: false }), async ctx => {
 
     // set cookies on response and redirect to team subdomain
     ctx.signIn(user, team, 'google', isFirstSignin);
+  } catch (err) {
+    if (err instanceof Sequelize.UniqueConstraintError) {
+      const exists = await User.findOne({
+        where: {
+          service: 'email',
+          email: profile.data.email,
+          teamId: team.id,
+        },
+      });
+
+      if (exists) {
+        ctx.redirect(`${team.url}?notice=email-auth-required`);
+      } else {
+        ctx.redirect(`${team.url}?notice=auth-error`);
+      }
+
+      return;
+    }
+
+    throw err;
+  }
 });
 
 export default router;

server/auth/index.js

@@ -10,12 +10,14 @@ import { stripSubdomain } from '../../shared/utils/domains';
 
 import slack from './slack';
 import google from './google';
+import email from './email';
 
 const app = new Koa();
 const router = new Router();
 
 router.use('/', slack.routes());
 router.use('/', google.routes());
+router.use('/', email.routes());
 
 router.get('/redirect', auth(), async ctx => {
   const user = ctx.state.user;

server/auth/slack.js

@@ -1,4 +1,5 @@
 // @flow
+import Sequelize from 'sequelize';
 import Router from 'koa-router';
 import auth from '../middlewares/authentication';
 import addHours from 'date-fns/add_hours';
@@ -14,6 +15,7 @@ import {
 } from '../models';
 import * as Slack from '../slack';
 
+const Op = Sequelize.Op;
 const router = new Router();
 
 // start the oauth process and redirect user to Slack
@@ -37,7 +39,7 @@ router.get('slack.callback', auth({ required: false }), async ctx => {
   ctx.assertPresent(state, 'state is required');
 
   if (state !== ctx.cookies.get('state')) {
-    ctx.redirect('/?notice=auth-error');
+    ctx.redirect('/?notice=auth-error&error=state_mismatch');
     return;
   }
   if (error) {
@@ -57,10 +59,18 @@ router.get('slack.callback', auth({ required: false }), async ctx => {
     },
   });
 
+  try {
     const [user, isFirstSignin] = await User.findOrCreate({
       where: {
+        [Op.or]: [
+          {
             service: 'slack',
             serviceId: data.user.id,
+          },
+          {
+            service: '',
+          },
+        ],
         teamId: team.id,
       },
       defaults: {
@@ -97,6 +107,27 @@ router.get('slack.callback', auth({ required: false }), async ctx => {
 
     // set cookies on response and redirect to team subdomain
     ctx.signIn(user, team, 'slack', isFirstSignin);
+  } catch (err) {
+    if (err instanceof Sequelize.UniqueConstraintError) {
+      const exists = await User.findOne({
+        where: {
+          service: 'email',
+          email: data.user.email,
+          teamId: team.id,
+        },
+      });
+
+      if (exists) {
+        ctx.redirect(`${team.url}?notice=email-auth-required`);
+      } else {
+        ctx.redirect(`${team.url}?notice=auth-error`);
+      }
+
+      return;
+    }
+
+    throw err;
+  }
 });
 
 router.get('slack.commands', auth({ required: false }), async ctx => {

server/commands/userInviter.js

@@ -2,8 +2,9 @@
 import { uniqBy } from 'lodash';
 import { User, Event, Team } from '../models';
 import mailer from '../mailer';
+import { sequelize } from '../sequelize';
 
-type Invite = { name: string, email: string };
+type Invite = { name: string, email: string, guest: boolean };
 
 export default async function userInviter({
   user,
@@ -16,7 +17,7 @@ export default async function userInviter({
 }): Promise<{ sent: Invite[] }> {
   const team = await Team.findByPk(user.teamId);
 
-  // filter out empties, duplicates and non-emails
+  // filter out empties, duplicates and obvious non-emails
   const compactedInvites = uniqBy(
     invites.filter(invite => !!invite.email.trim() && invite.email.match('@')),
     'email'
@@ -38,7 +39,19 @@ export default async function userInviter({
   // send and record invites
   await Promise.all(
     filteredInvites.map(async invite => {
-      await Event.create({
+      const transaction = await sequelize.transaction();
+      try {
+        await User.create(
+          {
+            teamId: user.teamId,
+            name: invite.name,
+            email: invite.email,
+            service: null,
+          },
+          { transaction }
+        );
+        await Event.create(
+          {
             name: 'users.invite',
             actorId: user.id,
             teamId: user.teamId,
@@ -47,15 +60,23 @@ export default async function userInviter({
               name: invite.name,
             },
             ip,
-      });
+          },
+          { transaction }
+        );
         await mailer.invite({
           to: invite.email,
           name: invite.name,
+          guest: invite.guest,
           actorName: user.name,
           actorEmail: user.email,
           teamName: team.name,
           teamUrl: team.url,
         });
+        await transaction.commit();
+      } catch (err) {
+        await transaction.rollback();
+        throw err;
+      }
     })
   );
 

server/emails/InviteEmail.js

@@ -10,6 +10,7 @@ import EmptySpace from './components/EmptySpace';
 
 export type Props = {
   name: string,
+  guest: boolean,
   actorName: string,
   actorEmail: string,
   teamName: string,
@@ -21,6 +22,7 @@ export const inviteEmailText = ({
   actorName,
   actorEmail,
   teamUrl,
+  guest,
 }: Props) => `
 Join ${teamName} on Outline
 
@@ -28,7 +30,7 @@ ${actorName} (${
   actorEmail
 }) has invited you to join Outline, a place for your team to build and share knowledge.
 
-Join now: ${teamUrl}
+Join now: ${teamUrl}${guest ? '?guest=true' : ''}
 `;
 
 export const InviteEmail = ({
@@ -36,6 +38,7 @@ export const InviteEmail = ({
   actorName,
   actorEmail,
   teamUrl,
+  guest,
 }: Props) => {
   return (
     <EmailTemplate>
@@ -49,7 +52,9 @@ export const InviteEmail = ({
         </p>
         <EmptySpace height={10} />
         <p>
-          <Button href={teamUrl}>Join now</Button>
+          <Button href={`${teamUrl}${guest ? '?guest=true' : ''}`}>
+            Join now
+          </Button>
         </p>
       </Body>
 

server/emails/SigninEmail.js

@@ -0,0 +1,51 @@
+// @flow
+import * as React from 'react';
+import EmailTemplate from './components/EmailLayout';
+import Body from './components/Body';
+import Button from './components/Button';
+import Heading from './components/Heading';
+import Header from './components/Header';
+import Footer from './components/Footer';
+import EmptySpace from './components/EmptySpace';
+
+export type Props = {
+  token: string,
+  teamUrl: string,
+};
+
+export const signinEmailText = ({ token, teamUrl }: Props) => `
+Use the link below to signin to Outline:
+
+${process.env.URL}/auth/email.callback?token=${token}
+
+If your magic link expired you can request a new one from your team’s
+signin page at: ${teamUrl}
+`;
+
+export const SigninEmail = ({ token, teamUrl }: Props) => {
+  return (
+    <EmailTemplate>
+      <Header />
+
+      <Body>
+        <Heading>Magic signin link</Heading>
+        <p>Click the button below to signin to Outline.</p>
+        <EmptySpace height={10} />
+        <p>
+          <Button
+            href={`${process.env.URL}/auth/email.callback?token=${token}`}
+          >
+            Sign In
+          </Button>
+        </p>
+        <EmptySpace height={10} />
+        <p>
+          If your magic link expired you can request a new one from your team’s
+          signin page at: <a href={teamUrl}>{teamUrl}</a>
+        </p>
+      </Body>
+
+      <Footer />
+    </EmailTemplate>
+  );
+};

server/mailer.js

@@ -8,6 +8,7 @@ import Queue from 'bull';
 import { baseStyles } from './emails/components/EmailLayout';
 import { WelcomeEmail, welcomeEmailText } from './emails/WelcomeEmail';
 import { ExportEmail, exportEmailText } from './emails/ExportEmail';
+import { SigninEmail, signinEmailText } from './emails/SigninEmail';
 import {
   type Props as InviteEmailT,
   InviteEmail,
@@ -123,6 +124,16 @@ export class Mailer {
     });
   };
 
+  signin = async (opts: { to: string, token: string, teamUrl: string }) => {
+    this.sendMail({
+      to: opts.to,
+      title: 'Magic signin link',
+      previewText: 'Here’s your link to signin to Outline.',
+      html: <SigninEmail {...opts} />,
+      text: signinEmailText(opts),
+    });
+  };
+
   documentNotification = async (
     opts: { to: string } & DocumentNotificationEmailT
   ) => {

server/middlewares/validation.js

@@ -24,7 +24,7 @@ export default function validation() {
       }
     };
 
-    ctx.assertEmail = (value, message) => {
+    ctx.assertEmail = (value = '', message) => {
       if (!validator.isEmail(value)) {
         throw new ValidationError(message);
       }

server/migrations/20191121035144-guest-invite.js

@@ -0,0 +1,25 @@
+module.exports = {
+  up: async (queryInterface, Sequelize) => {
+    await queryInterface.addColumn('teams', 'guestSignin', {
+      type: Sequelize.BOOLEAN,
+      allowNull: false,
+      defaultValue: false,
+    });
+    await queryInterface.addColumn('users', 'lastSigninEmailSentAt', {
+      type: Sequelize.DATE
+    });
+    await queryInterface.changeColumn('users', 'email', {
+      type: Sequelize.STRING,
+      allowNull: true,
+      defaultValue: null,
+    });
+  },
+  down: async (queryInterface, Sequelize) => {
+    await queryInterface.removeColumn('teams', 'guestSignin');
+    await queryInterface.removeColumn('users', 'lastSigninEmailSentAt');
+    await queryInterface.changeColumn('users', 'email', {
+      type: Sequelize.STRING,
+      allowNull: false
+    });
+  },
+};

server/models/Team.js

@@ -51,6 +51,11 @@ const Team = sequelize.define(
     googleId: { type: DataTypes.STRING, allowNull: true },
     avatarUrl: { type: DataTypes.STRING, allowNull: true },
     sharing: { type: DataTypes.BOOLEAN, allowNull: false, defaultValue: true },
+    guestSignin: {
+      type: DataTypes.BOOLEAN,
+      allowNull: false,
+      defaultValue: true,
+    },
     documentEmbeds: {
       type: DataTypes.BOOLEAN,
       allowNull: false,

server/models/User.js

@@ -8,6 +8,8 @@ import { publicS3Endpoint, uploadToS3FromUrl } from '../utils/s3';
 import { sendEmail } from '../mailer';
 import { Star, Team, Collection, NotificationSetting, ApiKey } from '.';
 
+const DEFAULT_AVATAR_HOST = 'https://tiley.herokuapp.com';
+
 const User = sequelize.define(
   'user',
   {
@@ -29,6 +31,7 @@ const User = sequelize.define(
     lastActiveIp: { type: DataTypes.STRING, allowNull: true },
     lastSignedInAt: DataTypes.DATE,
     lastSignedInIp: { type: DataTypes.STRING, allowNull: true },
+    lastSigninEmailSentAt: DataTypes.DATE,
     suspendedAt: DataTypes.DATE,
     suspendedById: DataTypes.UUID,
   },
@@ -38,6 +41,18 @@ const User = sequelize.define(
       isSuspended() {
         return !!this.suspendedAt;
       },
+      avatarUrl() {
+        const original = this.getDataValue('avatarUrl');
+        if (original) {
+          return original;
+        }
+
+        const hash = crypto
+          .createHash('md5')
+          .update(this.email || '')
+          .digest('hex');
+        return `${DEFAULT_AVATAR_HOST}/avatar/${hash}/${this.name[0]}.png`;
+      },
     },
   }
 );
@@ -96,12 +111,28 @@ User.prototype.getJwtToken = function() {
   return JWT.sign({ id: this.id }, this.jwtSecret);
 };
 
+User.prototype.getEmailSigninToken = function() {
+  if (this.service && this.service !== 'email') {
+    throw new Error('Cannot generate email signin token for OAuth user');
+  }
+
+  return JWT.sign(
+    { id: this.id, createdAt: new Date().toISOString() },
+    this.jwtSecret
+  );
+};
+
 const uploadAvatar = async model => {
   const endpoint = publicS3Endpoint();
+  const { avatarUrl } = model;
 
-  if (model.avatarUrl && !model.avatarUrl.startsWith(endpoint)) {
+  if (
+    avatarUrl &&
+    !avatarUrl.startsWith(endpoint) &&
+    !avatarUrl.startsWith(DEFAULT_AVATAR_HOST)
+  ) {
     const newUrl = await uploadToS3FromUrl(
-      model.avatarUrl,
+      avatarUrl,
       `avatars/${model.id}/${uuid.v4()}`
     );
     if (newUrl) model.avatarUrl = newUrl;
@@ -126,7 +157,7 @@ const removeIdentifyingInfo = async (model, options) => {
     transaction: options.transaction,
   });
 
-  model.email = '';
+  model.email = null;
   model.name = 'Unknown';
   model.avatarUrl = '';
   model.serviceId = null;
@@ -165,7 +196,7 @@ User.afterCreate(async user => {
   // From Slack support:
   // If you wish to contact users at an email address obtained through Slack,
   // you need them to opt-in through a clear and separate process.
-  if (!team.slackId) {
+  if (user.service && user.service !== 'slack') {
     sendEmail('welcome', user.email, { teamUrl: team.url });
   }
 });

server/pages/Home.js

@@ -3,7 +3,7 @@ import * as React from 'react';
 import { Helmet } from 'react-helmet';
 import styled from 'styled-components';
 import Grid from 'styled-components-grid';
-import AuthErrors from './components/AuthErrors';
+import AuthNotices from './components/AuthNotices';
 import Hero from './components/Hero';
 import HeroText from './components/HeroText';
 import SigninButtons from './components/SigninButtons';
@@ -24,7 +24,7 @@ function Home(props: Props) {
       </Helmet>
       <Grid>
         <Hero id="signin">
-          <AuthErrors notice={props.notice} />
+          <AuthNotices notice={props.notice} />
           {process.env.TEAM_LOGO && <Logo src={process.env.TEAM_LOGO} />}
           <h1>Our team’s knowledge base</h1>
           <HeroText>

server/pages/SubdomainSignin.js

@@ -4,15 +4,17 @@ import styled from 'styled-components';
 import Grid from 'styled-components-grid';
 import Hero from './components/Hero';
 import HeroText from './components/HeroText';
+import Button from './components/Button';
 import SigninButtons from './components/SigninButtons';
-import AuthErrors from './components/AuthErrors';
+import AuthNotices from './components/AuthNotices';
 import Centered from './components/Centered';
 import PageTitle from './components/PageTitle';
 import { Team } from '../models';
 
 type Props = {
   team: Team,
-  notice?: 'google-hd' | 'auth-error' | 'hd-not-allowed',
+  guest?: boolean,
+  notice?: 'google-hd' | 'auth-error' | 'hd-not-allowed' | 'guest-success',
   lastSignedIn: string,
   googleSigninEnabled: boolean,
   slackSigninEnabled: boolean,
@@ -21,6 +23,7 @@ type Props = {
 
 function SubdomainSignin({
   team,
+  guest,
   lastSignedIn,
   notice,
   googleSigninEnabled,
@@ -30,6 +33,18 @@ function SubdomainSignin({
   googleSigninEnabled = !!team.googleId && googleSigninEnabled;
   slackSigninEnabled = !!team.slackId && slackSigninEnabled;
 
+  const guestSigninEnabled = team.guestSignin;
+  const guestSigninForm = guestSigninEnabled && (
+    <div>
+      <form method="POST" action="/auth/email">
+        <EmailInput type="email" name="email" placeholder="jane@domain.com" />{' '}
+        <Button type="submit" as="button">
+          Sign In
+        </Button>
+      </form>
+    </div>
+  );
+
   // only show the "last signed in" hint if there is more than one option available
   const signinHint =
     googleSigninEnabled && slackSigninEnabled ? lastSignedIn : undefined;
@@ -39,8 +54,28 @@ function SubdomainSignin({
       <PageTitle title={`Sign in to ${team.name}`} />
       <Grid>
         <Hero>
-          <AuthErrors notice={notice} />
           <h1>{lastSignedIn ? 'Welcome back,' : 'Hey there,'}</h1>
+          <AuthNotices notice={notice} />
+          {guest ? (
+            <React.Fragment>
+              <HeroText>
+                Sign in with your email address to continue to {team.name}.
+                <Subdomain>{hostname}</Subdomain>
+              </HeroText>
+              {guestSigninForm}
+              <br />
+
+              <HeroText>Have a team account? Sign in with SSO…</HeroText>
+              <p>
+                <SigninButtons
+                  googleSigninEnabled={googleSigninEnabled}
+                  slackSigninEnabled={slackSigninEnabled}
+                  lastSignedIn={signinHint}
+                />
+              </p>
+            </React.Fragment>
+          ) : (
+            <React.Fragment>
               <HeroText>
                 Sign in with your team account to continue to {team.name}.
                 <Subdomain>{hostname}</Subdomain>
@@ -52,6 +87,11 @@ function SubdomainSignin({
                   lastSignedIn={signinHint}
                 />
               </p>
+
+              <HeroText>Have a guest account? Sign in with email…</HeroText>
+              {guestSigninForm}
+            </React.Fragment>
+          )}
         </Hero>
       </Grid>
       <Alternative>
@@ -64,6 +104,14 @@ function SubdomainSignin({
   );
 }
 
+const EmailInput = styled.input`
+  padding: 12px;
+  border-radius: 4px;
+  border: 1px solid #999;
+  min-width: 217px;
+  height: 56px;
+`;
+
 const Subdomain = styled.span`
   display: block;
   font-weight: 500;

server/pages/components/AuthNotices.js

@@ -6,9 +6,15 @@ type Props = {
   notice?: string,
 };
 
-export default function AuthErrors({ notice }: Props) {
+export default function AuthNotices({ notice }: Props) {
   return (
     <React.Fragment>
+      {notice === 'guest-success' && (
+        <Notice>
+          A magic sign-in link has been sent to your email address, no password
+          needed.
+        </Notice>
+      )}
       {notice === 'google-hd' && (
         <Notice>
           Sorry, Google sign in cannot be used with a personal email. Please try
@@ -21,12 +27,30 @@ export default function AuthErrors({ notice }: Props) {
           an allowed company domain.
         </Notice>
       )}
+      {notice === 'email-auth-required' && (
+        <Notice>
+          Your account uses email sign-in, please sign-in with email to
+          continue.
+        </Notice>
+      )}
+      {notice === 'email-auth-ratelimit' && (
+        <Notice>
+          An email sign-in link was recently sent, please check your inbox and
+          try again in a few minutes.
+        </Notice>
+      )}
       {notice === 'auth-error' && (
         <Notice>
           Authentication failed - we were unable to sign you in at this time.
           Please try again.
         </Notice>
       )}
+      {notice === 'expired-token' && (
+        <Notice>
+          Sorry, it looks like that sign-in link is no longer valid, please try
+          requesting another.
+        </Notice>
+      )}
       {notice === 'suspended' && (
         <Notice>
           Your Outline account has been suspended. To re-activate your account,

server/pages/components/Button.js

@@ -2,12 +2,13 @@
 import styled from 'styled-components';
 
 const Button = styled.a`
+  border: 0;
   display: inline-flex;
   align-items: center;
   padding: 10px 20px;
   color: ${props => props.theme.white};
   background: ${props => props.theme.black};
-  border-radius: 4px;
+  border-radius: 6px;
   font-weight: 600;
   height: 56px;
 `;

server/pages/components/HeroText.js

@@ -7,7 +7,7 @@ const HeroText = styled.p`
   font-weight: 500;
   text-align: left;
   max-width: 600px;
-  margin-bottom: 2em;
+  margin-bottom: 1em;
 `;
 
 export default HeroText;

server/pages/components/SigninButtons.js

@@ -13,12 +13,14 @@ type Props = {
   lastSignedIn?: string,
   googleSigninEnabled: boolean,
   slackSigninEnabled: boolean,
+  guestSigninEnabled?: boolean,
 };
 
 const SigninButtons = ({
   lastSignedIn,
   slackSigninEnabled,
   googleSigninEnabled,
+  guestSigninEnabled,
 }: Props) => {
   return (
     <Wrapper>

server/policies/user.js

@@ -16,10 +16,16 @@ allow(User, 'invite', User, actor => {
   return true;
 });
 
-allow(User, ['update', 'delete'], User, (actor, user) => {
+allow(User, 'update', User, (actor, user) => {
   if (!user || user.teamId !== actor.teamId) return false;
   if (user.id === actor.id) return true;
-  if (actor.isAdmin) return true;
+  throw new AdminRequiredError();
+});
+
+allow(User, 'delete', User, (actor, user) => {
+  if (!user || user.teamId !== actor.teamId) return false;
+  if (user.id === actor.id) return true;
+  if (actor.isAdmin && !user.lastActiveAt) return true;
   throw new AdminRequiredError();
 });
 

server/presenters/__snapshots__/user.test.js.snap

@@ -2,7 +2,7 @@
 
 exports[`presents a user 1`] = `
 Object {
-  "avatarUrl": "http://example.com/avatar.png",
+  "avatarUrl": undefined,
   "createdAt": undefined,
   "id": "123",
   "isAdmin": undefined,
@@ -14,7 +14,7 @@ Object {
 
 exports[`presents a user without slack data 1`] = `
 Object {
-  "avatarUrl": null,
+  "avatarUrl": undefined,
   "createdAt": undefined,
   "id": "123",
   "isAdmin": undefined,

server/presenters/team.js

@@ -10,6 +10,7 @@ export default function present(team: Team) {
     googleConnected: !!team.googleId,
     sharing: team.sharing,
     documentEmbeds: team.documentEmbeds,
+    guestSignin: team.guestSignin,
     subdomain: team.subdomain,
     url: team.url,
   };

server/presenters/user.js

@@ -22,8 +22,7 @@ export default (user: User, options: Options = {}): ?UserPresentation => {
   userData.name = user.name;
   userData.isAdmin = user.isAdmin;
   userData.isSuspended = user.isSuspended;
-  userData.avatarUrl =
+  userData.avatarUrl = user.avatarUrl;
-    user.avatarUrl || (user.slackData ? user.slackData.image_192 : null);
 
   if (options.includeDetails) {
     userData.email = user.email;

server/routes.js

@@ -96,6 +96,7 @@ router.get('/', async ctx => {
         ctx,
         <SubdomainSignin
           team={team}
+          guest={ctx.request.query.guest}
           notice={ctx.request.query.notice}
           lastSignedIn={lastSignedIn}
           googleSigninEnabled={!!process.env.GOOGLE_CLIENT_ID}

server/test/factories.js

@@ -50,6 +50,7 @@ export async function buildUser(overrides: Object = {}) {
     service: 'slack',
     serviceId: uuid.v4(),
     createdAt: new Date('2018-01-01T00:00:00.000Z'),
+    lastActiveAt: new Date('2018-01-01T00:00:00.000Z'),
     ...overrides,
   });
 }

server/utils/jwt.js

@@ -1,9 +1,10 @@
 // @flow
 import JWT from 'jsonwebtoken';
+import subMinutes from 'date-fns/sub_minutes';
 import { AuthenticationError } from '../errors';
 import { User } from '../models';
 
-export async function getUserForJWT(token: string) {
+function getJWTPayload(token) {
   let payload;
   try {
     payload = JWT.decode(token);
@@ -11,8 +12,14 @@ export async function getUserForJWT(token: string) {
     throw new AuthenticationError('Unable to decode JWT token');
   }
 
-  if (!payload) throw new AuthenticationError('Invalid token');
+  if (!payload) {
+    throw new AuthenticationError('Invalid token');
+  }
+  return payload;
+}
 
+export async function getUserForJWT(token: string) {
+  const payload = getJWTPayload(token);
   const user = await User.findByPk(payload.id);
 
   try {
@@ -23,3 +30,30 @@ export async function getUserForJWT(token: string) {
 
   return user;
 }
+
+export async function getUserForEmailSigninToken(token: string) {
+  const payload = getJWTPayload(token);
+
+  // check the token is within it's expiration time
+  if (payload.createdAt) {
+    if (new Date(payload.createdAt) < subMinutes(new Date(), 10)) {
+      throw new AuthenticationError('Expired token');
+    }
+  }
+
+  const user = await User.findByPk(payload.id);
+
+  // if user has signed in at all since the token was created then
+  // it's no longer valid, they'll need a new one.
+  if (user.lastSignedInAt > payload.createdAt) {
+    throw new AuthenticationError('Token has already been used');
+  }
+
+  try {
+    JWT.verify(token, user.jwtSecret);
+  } catch (err) {
+    throw new AuthenticationError('Invalid token');
+  }
+
+  return user;
+}

shared/styles/theme.js

@@ -57,6 +57,7 @@ export const base = {
 export const light = {
   ...base,
   background: colors.white,
+  secondaryBackground: colors.warmGrey,
 
   link: colors.almostBlack,
   text: colors.almostBlack,
@@ -106,6 +107,7 @@ export const light = {
 export const dark = {
   ...base,
   background: colors.almostBlack,
+  secondaryBackground: colors.black50,
 
   link: colors.almostWhite,
   text: colors.almostWhite,