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-rw-r--r--app/controllers/about_controller.rb2
-rw-r--r--app/controllers/admin/settings_controller.rb2
-rw-r--r--app/controllers/api/v1/accounts/relationships_controller.rb2
-rw-r--r--app/controllers/auth/confirmations_controller.rb23
-rw-r--r--app/controllers/auth/omniauth_callbacks_controller.rb33
-rw-r--r--app/javascript/mastodon/containers/timeline_container.js12
-rw-r--r--app/javascript/mastodon/features/standalone/community_timeline/index.js74
-rw-r--r--app/javascript/mastodon/locales/defaultMessages.json9
-rw-r--r--app/javascript/styles/mastodon/forms.scss18
-rw-r--r--app/mailers/notification_mailer.rb6
-rw-r--r--app/models/concerns/omniauthable.rb81
-rw-r--r--app/models/form/admin_settings.rb2
-rw-r--r--app/models/identity.rb22
-rw-r--r--app/models/user.rb4
-rw-r--r--app/validators/status_length_validator.rb2
-rw-r--r--app/views/admin/settings/edit.html.haml3
-rw-r--r--app/views/auth/confirmations/finish_signup.html.haml14
-rw-r--r--app/views/auth/sessions/new.html.haml9
18 files changed, 310 insertions, 8 deletions
diff --git a/app/controllers/about_controller.rb b/app/controllers/about_controller.rb
index 8785df14e..7b46b2228 100644
--- a/app/controllers/about_controller.rb
+++ b/app/controllers/about_controller.rb
@@ -36,7 +36,7 @@ class AboutController < ApplicationController
 
   def initial_state_params
     {
-      settings: {},
+      settings: { known_fediverse: Setting.show_known_fediverse_at_about_page },
       token: current_session&.token,
     }
   end
diff --git a/app/controllers/admin/settings_controller.rb b/app/controllers/admin/settings_controller.rb
index 487282dc3..a6214dc3f 100644
--- a/app/controllers/admin/settings_controller.rb
+++ b/app/controllers/admin/settings_controller.rb
@@ -19,6 +19,7 @@ module Admin
       min_invite_role
       activity_api_enabled
       peers_api_enabled
+      show_known_fediverse_at_about_page
     ).freeze
 
     BOOLEAN_SETTINGS = %w(
@@ -28,6 +29,7 @@ module Admin
       show_staff_badge
       activity_api_enabled
       peers_api_enabled
+      show_known_fediverse_at_about_page
     ).freeze
 
     UPLOAD_SETTINGS = %w(
diff --git a/app/controllers/api/v1/accounts/relationships_controller.rb b/app/controllers/api/v1/accounts/relationships_controller.rb
index 91a942d75..6cc3da498 100644
--- a/app/controllers/api/v1/accounts/relationships_controller.rb
+++ b/app/controllers/api/v1/accounts/relationships_controller.rb
@@ -10,7 +10,7 @@ class Api::V1::Accounts::RelationshipsController < Api::BaseController
     accounts = Account.where(id: account_ids).select('id')
     # .where doesn't guarantee that our results are in the same order
     # we requested them, so return the "right" order to the requestor.
-    @accounts = accounts.index_by(&:id).values_at(*account_ids)
+    @accounts = accounts.index_by(&:id).values_at(*account_ids).compact
     render json: @accounts, each_serializer: REST::RelationshipSerializer, relationships: relationships
   end
 
diff --git a/app/controllers/auth/confirmations_controller.rb b/app/controllers/auth/confirmations_controller.rb
index 72b8e9dd8..f3e0ae257 100644
--- a/app/controllers/auth/confirmations_controller.rb
+++ b/app/controllers/auth/confirmations_controller.rb
@@ -3,6 +3,7 @@
 class Auth::ConfirmationsController < Devise::ConfirmationsController
   layout 'auth'
 
+  before_action :set_user, only: [:finish_signup]
   before_action :set_pack
 
   private
@@ -10,4 +11,26 @@ class Auth::ConfirmationsController < Devise::ConfirmationsController
   def set_pack
     use_pack 'auth'
   end
+
+  # GET/PATCH /users/:id/finish_signup
+  def finish_signup
+    return unless request.patch? && params[:user]
+    if @user.update(user_params)
+      @user.skip_reconfirmation!
+      sign_in(@user, bypass: true)
+      redirect_to root_path, notice: I18n.t('devise.confirmations.send_instructions')
+    else
+      @show_errors = true
+    end
+  end
+
+  private
+
+  def set_user
+    @user = current_user
+  end
+
+  def user_params
+    params.require(:user).permit(:email)
+  end
 end
diff --git a/app/controllers/auth/omniauth_callbacks_controller.rb b/app/controllers/auth/omniauth_callbacks_controller.rb
new file mode 100644
index 000000000..bbf63bed3
--- /dev/null
+++ b/app/controllers/auth/omniauth_callbacks_controller.rb
@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+class Auth::OmniauthCallbacksController < Devise::OmniauthCallbacksController
+  skip_before_action :verify_authenticity_token
+
+  def self.provides_callback_for(provider)
+    provider_id = provider.to_s.chomp '_oauth2'
+
+    define_method provider do
+      @user = User.find_for_oauth(request.env['omniauth.auth'], current_user)
+
+      if @user.persisted?
+        sign_in_and_redirect @user, event: :authentication
+        set_flash_message(:notice, :success, kind: provider_id.capitalize) if is_navigational_format?
+      else
+        session["devise.#{provider}_data"] = request.env['omniauth.auth']
+        redirect_to new_user_registration_url
+      end
+    end
+  end
+
+  Devise.omniauth_configs.each_key do |provider|
+    provides_callback_for provider
+  end
+
+  def after_sign_in_path_for(resource)
+    if resource.email_verified?
+      root_path
+    else
+      finish_signup_path
+    end
+  end
+end
diff --git a/app/javascript/mastodon/containers/timeline_container.js b/app/javascript/mastodon/containers/timeline_container.js
index e84c921ee..8719bb5c9 100644
--- a/app/javascript/mastodon/containers/timeline_container.js
+++ b/app/javascript/mastodon/containers/timeline_container.js
@@ -6,6 +6,7 @@ import { hydrateStore } from '../actions/store';
 import { IntlProvider, addLocaleData } from 'react-intl';
 import { getLocale } from '../locales';
 import PublicTimeline from '../features/standalone/public_timeline';
+import CommunityTimeline from '../features/standalone/community_timeline';
 import HashtagTimeline from '../features/standalone/hashtag_timeline';
 import initialState from '../initial_state';
 
@@ -23,17 +24,24 @@ export default class TimelineContainer extends React.PureComponent {
   static propTypes = {
     locale: PropTypes.string.isRequired,
     hashtag: PropTypes.string,
+    showPublicTimeline: PropTypes.bool.isRequired,
+  };
+
+  static defaultProps = {
+    showPublicTimeline: initialState.settings.known_fediverse,
   };
 
   render () {
-    const { locale, hashtag } = this.props;
+    const { locale, hashtag, showPublicTimeline } = this.props;
 
     let timeline;
 
     if (hashtag) {
       timeline = <HashtagTimeline hashtag={hashtag} />;
-    } else {
+    } else if (showPublicTimeline) {
       timeline = <PublicTimeline />;
+    } else {
+      timeline = <CommunityTimeline />;
     }
 
     return (
diff --git a/app/javascript/mastodon/features/standalone/community_timeline/index.js b/app/javascript/mastodon/features/standalone/community_timeline/index.js
new file mode 100644
index 000000000..51e50e1f5
--- /dev/null
+++ b/app/javascript/mastodon/features/standalone/community_timeline/index.js
@@ -0,0 +1,74 @@
+import React from 'react';
+import { connect } from 'react-redux';
+import PropTypes from 'prop-types';
+import StatusListContainer from '../../ui/containers/status_list_container';
+import {
+  refreshCommunityTimeline,
+  expandCommunityTimeline,
+} from '../../../actions/timelines';
+import Column from '../../../components/column';
+import ColumnHeader from '../../../components/column_header';
+import { defineMessages, injectIntl } from 'react-intl';
+import { connectCommunityStream } from '../../../actions/streaming';
+
+const messages = defineMessages({
+  title: { id: 'standalone.public_title', defaultMessage: 'A look inside...' },
+});
+
+@connect()
+@injectIntl
+export default class CommunityTimeline extends React.PureComponent {
+
+  static propTypes = {
+    dispatch: PropTypes.func.isRequired,
+    intl: PropTypes.object.isRequired,
+  };
+
+  handleHeaderClick = () => {
+    this.column.scrollTop();
+  }
+
+  setRef = c => {
+    this.column = c;
+  }
+
+  componentDidMount () {
+    const { dispatch } = this.props;
+
+    dispatch(refreshCommunityTimeline());
+    this.disconnect = dispatch(connectCommunityStream());
+  }
+
+  componentWillUnmount () {
+    if (this.disconnect) {
+      this.disconnect();
+      this.disconnect = null;
+    }
+  }
+
+  handleLoadMore = () => {
+    this.props.dispatch(expandCommunityTimeline());
+  }
+
+  render () {
+    const { intl } = this.props;
+
+    return (
+      <Column ref={this.setRef}>
+        <ColumnHeader
+          icon='users'
+          title={intl.formatMessage(messages.title)}
+          onClick={this.handleHeaderClick}
+        />
+
+        <StatusListContainer
+          timelineId='community'
+          loadMore={this.handleLoadMore}
+          scrollKey='standalone_public_timeline'
+          trackScroll={false}
+        />
+      </Column>
+    );
+  }
+
+}
diff --git a/app/javascript/mastodon/locales/defaultMessages.json b/app/javascript/mastodon/locales/defaultMessages.json
index a15da83ab..a27f17b42 100644
--- a/app/javascript/mastodon/locales/defaultMessages.json
+++ b/app/javascript/mastodon/locales/defaultMessages.json
@@ -1237,6 +1237,15 @@
         "id": "standalone.public_title"
       }
     ],
+    "path": "app/javascript/mastodon/features/standalone/community_timeline/index.json"
+  },
+  {
+    "descriptors": [
+      {
+        "defaultMessage": "A look inside...",
+        "id": "standalone.public_title"
+      }
+    ],
     "path": "app/javascript/mastodon/features/standalone/public_timeline/index.json"
   },
   {
diff --git a/app/javascript/styles/mastodon/forms.scss b/app/javascript/styles/mastodon/forms.scss
index 2bef53cff..dec7d2284 100644
--- a/app/javascript/styles/mastodon/forms.scss
+++ b/app/javascript/styles/mastodon/forms.scss
@@ -568,3 +568,21 @@ code {
     margin-bottom: 4px;
   }
 }
+
+.alternative-login {
+  margin-top: 20px;
+  margin-bottom: 20px;
+
+  h4 {
+    font-size: 16px;
+    color: $ui-base-lighter-color;
+    text-align: center;
+    margin-bottom: 20px;
+    border: 0;
+    padding: 0;
+  }
+
+  .button {
+    display: block;
+  }
+}
diff --git a/app/mailers/notification_mailer.rb b/app/mailers/notification_mailer.rb
index 9fed4a636..b45844296 100644
--- a/app/mailers/notification_mailer.rb
+++ b/app/mailers/notification_mailer.rb
@@ -9,7 +9,7 @@ class NotificationMailer < ApplicationMailer
     @me     = recipient
     @status = notification.target_status
 
-    return if @me.user.disabled?
+    return if @me.user.disabled? || @status.nil?
 
     locale_for_account(@me) do
       thread_by_conversation(@status.conversation)
@@ -33,7 +33,7 @@ class NotificationMailer < ApplicationMailer
     @account = notification.from_account
     @status  = notification.target_status
 
-    return if @me.user.disabled?
+    return if @me.user.disabled? || @status.nil?
 
     locale_for_account(@me) do
       thread_by_conversation(@status.conversation)
@@ -46,7 +46,7 @@ class NotificationMailer < ApplicationMailer
     @account = notification.from_account
     @status  = notification.target_status
 
-    return if @me.user.disabled?
+    return if @me.user.disabled? || @status.nil?
 
     locale_for_account(@me) do
       thread_by_conversation(@status.conversation)
diff --git a/app/models/concerns/omniauthable.rb b/app/models/concerns/omniauthable.rb
new file mode 100644
index 000000000..a3d55108d
--- /dev/null
+++ b/app/models/concerns/omniauthable.rb
@@ -0,0 +1,81 @@
+# frozen_string_literal: true
+
+module Omniauthable
+  extend ActiveSupport::Concern
+
+  TEMP_EMAIL_PREFIX = 'change@me'
+  TEMP_EMAIL_REGEX = /\Achange@me/
+
+  included do
+    def omniauth_providers
+      Devise.omniauth_configs.keys
+    end
+
+    def email_verified?
+      email && email !~ TEMP_EMAIL_REGEX
+    end
+  end
+
+  class_methods do
+    def find_for_oauth(auth, signed_in_resource = nil)
+      # EOLE-SSO Patch
+      auth.uid = (auth.uid[0][:uid] || auth.uid[0][:user]) if auth.uid.is_a? Hashie::Array
+      identity = Identity.find_for_oauth(auth)
+
+      # If a signed_in_resource is provided it always overrides the existing user
+      # to prevent the identity being locked with accidentally created accounts.
+      # Note that this may leave zombie accounts (with no associated identity) which
+      # can be cleaned up at a later date.
+      user = signed_in_resource ? signed_in_resource : identity.user
+      user = create_for_oauth(auth) if user.nil?
+
+      if identity.user.nil?
+        identity.user = user
+        identity.save!
+      end
+
+      user
+    end
+
+    def create_for_oauth(auth)
+      # Check if the user exists with provided email if the provider gives us a
+      # verified email.  If no verified email was provided or the user already
+      # exists, we assign a temporary email and ask the user to verify it on
+      # the next step via Auth::ConfirmationsController.finish_signup
+
+      user = User.new(user_params_from_auth(auth))
+      user.account.avatar_remote_url = auth.info.image if auth.info.image =~ /\A#{URI.regexp(%w(http https))}\z/
+      user.skip_confirmation!
+      user.save!
+      user
+    end
+
+    private
+
+    def user_params_from_auth(auth)
+      email_is_verified = auth.info.email && (auth.info.verified || auth.info.verified_email)
+      email             = auth.info.email if email_is_verified && !User.exists?(email: auth.info.email)
+
+      {
+        email: email ? email : "#{TEMP_EMAIL_PREFIX}-#{auth.uid}-#{auth.provider}.com",
+        password: Devise.friendly_token[0, 20],
+        account_attributes: {
+          username: ensure_unique_username(auth.uid),
+          display_name: [auth.info.first_name, auth.info.last_name].join(' '),
+        },
+      }
+    end
+
+    def ensure_unique_username(starting_username)
+      username = starting_username
+      i        = 0
+
+      while Account.exists?(username: username)
+        i       += 1
+        username = "#{starting_username}_#{i}"
+      end
+
+      username
+    end
+  end
+end
diff --git a/app/models/form/admin_settings.rb b/app/models/form/admin_settings.rb
index dd629279c..32922e7f1 100644
--- a/app/models/form/admin_settings.rb
+++ b/app/models/form/admin_settings.rb
@@ -34,6 +34,8 @@ class Form::AdminSettings
     :activity_api_enabled=,
     :peers_api_enabled,
     :peers_api_enabled=,
+    :show_known_fediverse_at_about_page,
+    :show_known_fediverse_at_about_page=,
     to: Setting
   )
 end
diff --git a/app/models/identity.rb b/app/models/identity.rb
new file mode 100644
index 000000000..a5e0c09ec
--- /dev/null
+++ b/app/models/identity.rb
@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+# == Schema Information
+#
+# Table name: identities
+#
+#  id         :integer          not null, primary key
+#  user_id    :integer
+#  provider   :string           default(""), not null
+#  uid        :string           default(""), not null
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#
+
+class Identity < ApplicationRecord
+  belongs_to :user, dependent: :destroy
+  validates :uid, presence: true, uniqueness: { scope: :provider }
+  validates :provider, presence: true
+
+  def self.find_for_oauth(auth)
+    find_or_create_by(uid: auth.uid, provider: auth.provider)
+  end
+end
diff --git a/app/models/user.rb b/app/models/user.rb
index 6ef6db915..d495fc390 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -39,6 +39,7 @@
 
 class User < ApplicationRecord
   include Settings::Extend
+  include Omniauthable
 
   ACTIVE_DURATION = 14.days
 
@@ -51,7 +52,8 @@ class User < ApplicationRecord
   devise :registerable, :recoverable, :rememberable, :trackable, :validatable,
          :confirmable
 
-  devise :pam_authenticatable
+  devise :pam_authenticatable if Devise.pam_authentication
+  devise :omniauthable
 
   belongs_to :account, inverse_of: :user
   belongs_to :invite, counter_cache: :uses, optional: true
diff --git a/app/validators/status_length_validator.rb b/app/validators/status_length_validator.rb
index 79d17742a..2db9b29f6 100644
--- a/app/validators/status_length_validator.rb
+++ b/app/validators/status_length_validator.rb
@@ -23,6 +23,8 @@ class StatusLengthValidator < ActiveModel::Validator
   end
 
   def countable_text(status)
+    return '' if status.text.nil?
+
     status.text.dup.tap do |new_text|
       new_text.gsub!(FetchLinkCardService::URL_PATTERN, 'x' * 23)
       new_text.gsub!(Account::MENTION_RE, '@\2')
diff --git a/app/views/admin/settings/edit.html.haml b/app/views/admin/settings/edit.html.haml
index 4f9115ed2..73fd5642e 100644
--- a/app/views/admin/settings/edit.html.haml
+++ b/app/views/admin/settings/edit.html.haml
@@ -19,6 +19,9 @@
     = f.input :timeline_preview, as: :boolean, wrapper: :with_label, label: t('admin.settings.timeline_preview.title'), hint: t('admin.settings.timeline_preview.desc_html')
 
   .fields-group
+    = f.input :show_known_fediverse_at_about_page, as: :boolean, wrapper: :with_label, label: t('admin.settings.show_known_fediverse_at_about_page.title'), hint: t('admin.settings.show_known_fediverse_at_about_page.desc_html')
+
+  .fields-group
     = f.input :show_staff_badge, as: :boolean, wrapper: :with_label, label: t('admin.settings.show_staff_badge.title'), hint: t('admin.settings.show_staff_badge.desc_html')
 
   .fields-group
diff --git a/app/views/auth/confirmations/finish_signup.html.haml b/app/views/auth/confirmations/finish_signup.html.haml
new file mode 100644
index 000000000..4b5161d6b
--- /dev/null
+++ b/app/views/auth/confirmations/finish_signup.html.haml
@@ -0,0 +1,14 @@
+- content_for :page_title do
+  = t('auth.confirm_email')
+
+= simple_form_for(current_user, as: 'user', url: finish_signup_path, html: { role: 'form'}) do |f|
+  - if @show_errors && current_user.errors.any?
+    #error_explanation
+      - current_user.errors.full_messages.each do |msg|
+        = msg
+        %br
+
+  = f.input :email
+
+  .actions
+    = f.submit t('auth.confirm_email'), class: 'button'
diff --git a/app/views/auth/sessions/new.html.haml b/app/views/auth/sessions/new.html.haml
index 3edb0d2d4..1c3a0b6b4 100644
--- a/app/views/auth/sessions/new.html.haml
+++ b/app/views/auth/sessions/new.html.haml
@@ -14,4 +14,13 @@
   .actions
     = f.button :button, t('auth.login'), type: :submit
 
+- if devise_mapping.omniauthable? and resource_class.omniauth_providers.any?
+  .simple_form.alternative-login
+    %h4= t('auth.or_log_in_with')
+
+    .actions
+      - resource_class.omniauth_providers.each do |provider|
+        = link_to omniauth_authorize_path(resource_name, provider), class: "button button-#{provider}" do
+          = t("auth.providers.#{provider}", default: provider.to_s.chomp("_oauth2").capitalize)
+
 .form-footer= render 'auth/shared/links'