From c656f41b3547273b10e0989a304c55329a549e7f Mon Sep 17 00:00:00 2001
From: KMY <tt@kmycode.net>
Date: Thu, 6 Jul 2023 15:34:09 +0900
Subject: [PATCH] Add status references list page

---
 .../referred_by_statuses_controller.rb        | 67 +++++++++++++
 .../mastodon/actions/interactions.js          | 41 +++++++-
 .../notifications/components/filter_bar.jsx   |  2 +-
 .../notifications/components/notification.jsx |  4 +-
 .../status/components/detailed_status.jsx     | 23 ++++-
 .../features/status_references/index.jsx      | 95 +++++++++++++++++++
 app/javascript/mastodon/features/ui/index.jsx |  3 +
 .../features/ui/util/async-components.js      |  4 +
 .../mastodon/reducers/user_lists.js           |  4 +
 config/routes/api.rb                          |  1 +
 10 files changed, 239 insertions(+), 5 deletions(-)
 create mode 100644 app/controllers/api/v1/statuses/referred_by_statuses_controller.rb
 create mode 100644 app/javascript/mastodon/features/status_references/index.jsx

diff --git a/app/controllers/api/v1/statuses/referred_by_statuses_controller.rb b/app/controllers/api/v1/statuses/referred_by_statuses_controller.rb
new file mode 100644
index 0000000000..7f3392c260
--- /dev/null
+++ b/app/controllers/api/v1/statuses/referred_by_statuses_controller.rb
@@ -0,0 +1,67 @@
+# frozen_string_literal: true
+
+class Api::V1::Statuses::ReferredByStatusesController < Api::BaseController
+  include Authorization
+
+  before_action -> { authorize_if_got_token! :read, :'read:accounts' }
+  before_action :set_status
+  after_action :insert_pagination_headers
+
+  def index
+    @statuses = load_statuses
+    render json: @statuses, each_serializer: REST::StatusSerializer, relationships: StatusRelationshipsPresenter.new(@statuses, current_user&.account_id)
+  end
+
+  private
+
+  def load_statuses
+    cached_references
+  end
+
+  def cached_references
+    cache_collection(results, Status)
+  end
+
+  def results
+    @results ||= Status.where(id: @status.referenced_by_status_objects.select(:status_id)).paginate_by_max_id(
+      limit_param(DEFAULT_STATUSES_LIMIT),
+      params[:max_id],
+      params[:since_id]
+    )
+  end
+
+  def insert_pagination_headers
+    set_pagination_headers(next_path, prev_path)
+  end
+
+  def next_path
+    api_v1_status_referred_by_index_url pagination_params(max_id: pagination_max_id) if records_continue?
+  end
+
+  def prev_path
+    api_v1_status_referred_by_index_url pagination_params(min_id: pagination_since_id) unless results.empty?
+  end
+
+  def pagination_max_id
+    results.last.id
+  end
+
+  def pagination_since_id
+    results.first.id
+  end
+
+  def records_continue?
+    results.size == limit_param(DEFAULT_STATUSES_LIMIT)
+  end
+
+  def set_status
+    @status = Status.find(params[:status_id])
+    authorize @status, :show?
+  rescue Mastodon::NotPermittedError
+    not_found
+  end
+
+  def pagination_params(core_params)
+    params.slice(:limit).permit(:limit).merge(core_params)
+  end
+end
diff --git a/app/javascript/mastodon/actions/interactions.js b/app/javascript/mastodon/actions/interactions.js
index ee27c7e0d5..e7841e178a 100644
--- a/app/javascript/mastodon/actions/interactions.js
+++ b/app/javascript/mastodon/actions/interactions.js
@@ -1,6 +1,6 @@
 import api from '../api';
 
-import { importFetchedAccounts, importFetchedStatus } from './importer';
+import { importFetchedAccounts, importFetchedStatus, importFetchedStatuses } from './importer';
 
 export const REBLOG_REQUEST = 'REBLOG_REQUEST';
 export const REBLOG_SUCCESS = 'REBLOG_SUCCESS';
@@ -34,6 +34,10 @@ export const FAVOURITES_FETCH_REQUEST = 'FAVOURITES_FETCH_REQUEST';
 export const FAVOURITES_FETCH_SUCCESS = 'FAVOURITES_FETCH_SUCCESS';
 export const FAVOURITES_FETCH_FAIL    = 'FAVOURITES_FETCH_FAIL';
 
+export const STATUS_REFERENCES_FETCH_REQUEST = 'STATUS_REFERENCES_FETCH_REQUEST';
+export const STATUS_REFERENCES_FETCH_SUCCESS = 'STATUS_REFERENCES_FETCH_SUCCESS';
+export const STATUS_REFERENCES_FETCH_FAIL    = 'STATUS_REFERENCES_FETCH_FAIL';
+
 export const EMOJI_REACTIONS_FETCH_REQUEST = 'EMOJI_REACTIONS_FETCH_REQUEST';
 export const EMOJI_REACTIONS_FETCH_SUCCESS = 'EMOJI_REACTIONS_FETCH_SUCCESS';
 export const EMOJI_REACTIONS_FETCH_FAIL    = 'EMOJI_REACTIONS_FETCH_FAIL';
@@ -470,6 +474,41 @@ export function fetchEmojiReactionsFail(id, error) {
   };
 }
 
+export function fetchStatusReferences(id) {
+  return (dispatch, getState) => {
+    dispatch(fetchStatusReferencesRequest(id));
+
+    api(getState).get(`/api/v1/statuses/${id}/referred_by`).then(response => {
+      dispatch(importFetchedStatuses(response.data));
+      dispatch(fetchStatusReferencesSuccess(id, response.data));
+    }).catch(error => {
+      dispatch(fetchStatusReferencesFail(id, error));
+    });
+  };
+}
+
+export function fetchStatusReferencesRequest(id) {
+  return {
+    type: STATUS_REFERENCES_FETCH_REQUEST,
+    id,
+  };
+}
+
+export function fetchStatusReferencesSuccess(id, statuses) {
+  return {
+    type: STATUS_REFERENCES_FETCH_SUCCESS,
+    id,
+    statuses,
+  };
+}
+
+export function fetchStatusReferencesFail(id, error) {
+  return {
+    type: STATUS_REFERENCES_FETCH_FAIL,
+    error,
+  };
+}
+
 export function pin(status) {
   return (dispatch, getState) => {
     dispatch(pinRequest(status));
diff --git a/app/javascript/mastodon/features/notifications/components/filter_bar.jsx b/app/javascript/mastodon/features/notifications/components/filter_bar.jsx
index 7fcd63e110..2c0431d3fd 100644
--- a/app/javascript/mastodon/features/notifications/components/filter_bar.jsx
+++ b/app/javascript/mastodon/features/notifications/components/filter_bar.jsx
@@ -96,7 +96,7 @@ class FilterBar extends PureComponent {
           onClick={this.onClick('status_reference')}
           title={intl.formatMessage(tooltips.status_references)}
         >
-          <Icon id='retweet' fixedWidth />
+          <Icon id='link' fixedWidth />
         </button>
         <button
           className={selectedFilter === 'poll' ? 'active' : ''}
diff --git a/app/javascript/mastodon/features/notifications/components/notification.jsx b/app/javascript/mastodon/features/notifications/components/notification.jsx
index 8f1c88558f..c19997e8f5 100644
--- a/app/javascript/mastodon/features/notifications/components/notification.jsx
+++ b/app/javascript/mastodon/features/notifications/components/notification.jsx
@@ -294,10 +294,10 @@ class Notification extends ImmutablePureComponent {
 
     return (
       <HotKeys handlers={this.getHandlers()}>
-        <div className={classNames('notification notification-reblog focusable', { unread })} tabIndex={0} aria-label={notificationForScreenReader(intl, intl.formatMessage(messages.reblog, { name: notification.getIn(['account', 'acct']) }), notification.get('created_at'))}>
+        <div className={classNames('notification notification-status_reference focusable', { unread })} tabIndex={0} aria-label={notificationForScreenReader(intl, intl.formatMessage(messages.statusReference, { name: notification.getIn(['account', 'acct']) }), notification.get('created_at'))}>
           <div className='notification__message'>
             <div className='notification__favourite-icon-wrapper'>
-              <Icon id='retweet' fixedWidth />
+              <Icon id='link' fixedWidth />
             </div>
 
             <span title={notification.get('created_at')}>
diff --git a/app/javascript/mastodon/features/status/components/detailed_status.jsx b/app/javascript/mastodon/features/status/components/detailed_status.jsx
index 2f097ba57e..6bd016332b 100644
--- a/app/javascript/mastodon/features/status/components/detailed_status.jsx
+++ b/app/javascript/mastodon/features/status/components/detailed_status.jsx
@@ -137,6 +137,7 @@ class DetailedStatus extends ImmutablePureComponent {
     let reblogIcon = 'retweet';
     let favouriteLink = '';
     let emojiReactionsLink = '';
+    let statusReferencesLink = '';
     let edited = '';
 
     if (this.props.measureHeight) {
@@ -310,6 +311,26 @@ class DetailedStatus extends ImmutablePureComponent {
       );
     }
 
+    if (this.context.router) {
+      statusReferencesLink = (
+        <Link to={`/@${status.getIn(['account', 'acct'])}/${status.get('id')}/references`} className='detailed-status__link'>
+          <Icon id='link' />
+          <span className='detailed-status__favorites'>
+            <AnimatedNumber value={status.get('status_referred_by_count')} />
+          </span>
+        </Link>
+      );
+    } else {
+      statusReferencesLink = (
+        <a href={`/interact/${status.get('id')}?type=references`} className='detailed-status__link' onClick={this.handleModalLink}>
+          <Icon id='link' />
+          <span className='detailed-status__favorites'>
+            <AnimatedNumber value={status.get('status_referred_by_count')} />
+          </span>
+        </a>
+      );
+    }
+
     if (status.get('edited_at')) {
       edited = (
         <>
@@ -347,7 +368,7 @@ class DetailedStatus extends ImmutablePureComponent {
           <div className='detailed-status__meta'>
             <a className='detailed-status__datetime' href={`/@${status.getIn(['account', 'acct'])}/${status.get('id')}`} target='_blank' rel='noopener noreferrer'>
               <FormattedDate value={new Date(status.get('created_at'))} hour12={false} year='numeric' month='short' day='2-digit' hour='2-digit' minute='2-digit' />
-            </a>{edited}{visibilityLink}{searchabilityLink}{applicationLink}{reblogLink} · {favouriteLink} · {emojiReactionsLink}
+            </a>{edited}{visibilityLink}{searchabilityLink}{applicationLink}{reblogLink} · {favouriteLink} · {emojiReactionsLink} - {statusReferencesLink}
           </div>
         </div>
       </div>
diff --git a/app/javascript/mastodon/features/status_references/index.jsx b/app/javascript/mastodon/features/status_references/index.jsx
new file mode 100644
index 0000000000..00e200f42e
--- /dev/null
+++ b/app/javascript/mastodon/features/status_references/index.jsx
@@ -0,0 +1,95 @@
+import PropTypes from 'prop-types';
+
+import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
+
+import { Helmet } from 'react-helmet';
+
+import ImmutablePropTypes from 'react-immutable-proptypes';
+import ImmutablePureComponent from 'react-immutable-pure-component';
+import { connect } from 'react-redux';
+
+import { fetchStatusReferences } from 'mastodon/actions/interactions';
+import ColumnHeader from 'mastodon/components/column_header';
+import { Icon }  from 'mastodon/components/icon';
+import LoadingIndicator from 'mastodon/components/loading_indicator';
+import ScrollableList from 'mastodon/components/scrollable_list';
+import StatusContainer from 'mastodon/containers/status_container';
+import Column from 'mastodon/features/ui/components/column';
+
+const messages = defineMessages({
+  refresh: { id: 'refresh', defaultMessage: 'Refresh' },
+});
+
+const mapStateToProps = (state, props) => ({
+  accountIds: state.getIn(['user_lists', 'referred_by', props.params.statusId]),
+});
+
+class StatusReferences extends ImmutablePureComponent {
+
+  static propTypes = {
+    params: PropTypes.object.isRequired,
+    dispatch: PropTypes.func.isRequired,
+    accountIds: ImmutablePropTypes.list,
+    multiColumn: PropTypes.bool,
+    intl: PropTypes.object.isRequired,
+  };
+
+  UNSAFE_componentWillMount () {
+    if (!this.props.accountIds) {
+      this.props.dispatch(fetchStatusReferences(this.props.params.statusId));
+    }
+  }
+
+  UNSAFE_componentWillReceiveProps (nextProps) {
+    if (nextProps.params.statusId !== this.props.params.statusId && nextProps.params.statusId) {
+      this.props.dispatch(fetchStatusReferences(nextProps.params.statusId));
+    }
+  }
+
+  handleRefresh = () => {
+    this.props.dispatch(fetchStatusReferences(this.props.params.statusId));
+  };
+
+  render () {
+    const { intl, accountIds, multiColumn } = this.props;
+
+    if (!accountIds) {
+      return (
+        <Column>
+          <LoadingIndicator />
+        </Column>
+      );
+    }
+
+    const emptyMessage = <FormattedMessage id='empty_column.status_references' defaultMessage='No one has referred this post yet. When someone does, they will show up here.' />;
+
+    return (
+      <Column bindToDocument={!multiColumn}>
+        <ColumnHeader
+          showBackButton
+          multiColumn={multiColumn}
+          extraButton={(
+            <button type='button' className='column-header__button' title={intl.formatMessage(messages.refresh)} aria-label={intl.formatMessage(messages.refresh)} onClick={this.handleRefresh}><Icon id='refresh' /></button>
+          )}
+        />
+
+        <ScrollableList
+          scrollKey='references'
+          emptyMessage={emptyMessage}
+          bindToDocument={!multiColumn}
+        >
+          {accountIds.map(id =>
+            <StatusContainer key={id} id={id} withNote={false} />,
+          )}
+        </ScrollableList>
+
+        <Helmet>
+          <meta name='robots' content='noindex' />
+        </Helmet>
+      </Column>
+    );
+  }
+
+}
+
+export default connect(mapStateToProps)(injectIntl(StatusReferences));
diff --git a/app/javascript/mastodon/features/ui/index.jsx b/app/javascript/mastodon/features/ui/index.jsx
index b765ee568b..73ba5c1a42 100644
--- a/app/javascript/mastodon/features/ui/index.jsx
+++ b/app/javascript/mastodon/features/ui/index.jsx
@@ -46,6 +46,7 @@ import {
   Reblogs,
   Favourites,
   EmojiReactions,
+  StatusReferences,
   DirectTimeline,
   HashtagTimeline,
   Notifications,
@@ -221,6 +222,7 @@ class SwitchingColumnsArea extends PureComponent {
           <WrappedRoute path='/@:acct/:statusId/reblogs' component={Reblogs} content={children} />
           <WrappedRoute path='/@:acct/:statusId/favourites' component={Favourites} content={children} />
           <WrappedRoute path='/@:acct/:statusId/emoji_reactions' component={EmojiReactions} content={children} />
+          <WrappedRoute path='/@:acct/:statusId/references' component={StatusReferences} content={children} />
 
           {/* Legacy routes, cannot be easily factored with other routes because they share a param name */}
           <WrappedRoute path='/timelines/tag/:id' component={HashtagTimeline} content={children} />
@@ -229,6 +231,7 @@ class SwitchingColumnsArea extends PureComponent {
           <WrappedRoute path='/statuses/:statusId/reblogs' component={Reblogs} content={children} />
           <WrappedRoute path='/statuses/:statusId/favourites' component={Favourites} content={children} />
           <WrappedRoute path='/statuses/:statusId/emoji_reactions' component={EmojiReactions} content={children} />
+          <WrappedRoute path='/statuses/:statusId/references' component={StatusReferences} content={children} />
 
           <WrappedRoute path='/follow_requests' component={FollowRequests} content={children} />
           <WrappedRoute path='/blocks' component={Blocks} content={children} />
diff --git a/app/javascript/mastodon/features/ui/util/async-components.js b/app/javascript/mastodon/features/ui/util/async-components.js
index a10991026a..be6027464c 100644
--- a/app/javascript/mastodon/features/ui/util/async-components.js
+++ b/app/javascript/mastodon/features/ui/util/async-components.js
@@ -82,6 +82,10 @@ export function EmojiReactions () {
   return import(/* webpackChunkName: "features/emoji_reactions" */'../../emoji_reactions');
 }
 
+export function StatusReferences () {
+  return import(/* webpackChunkName: "features/status_references" */'../../status_references');
+}
+
 export function FollowRequests () {
   return import(/* webpackChunkName: "features/follow_requests" */'../../follow_requests');
 }
diff --git a/app/javascript/mastodon/reducers/user_lists.js b/app/javascript/mastodon/reducers/user_lists.js
index e731b619c0..99d91dbc77 100644
--- a/app/javascript/mastodon/reducers/user_lists.js
+++ b/app/javascript/mastodon/reducers/user_lists.js
@@ -48,6 +48,7 @@ import {
   REBLOGS_FETCH_SUCCESS,
   FAVOURITES_FETCH_SUCCESS,
   EMOJI_REACTIONS_FETCH_SUCCESS,
+  STATUS_REFERENCES_FETCH_SUCCESS,
 } from '../actions/interactions';
 import {
   MUTES_FETCH_REQUEST,
@@ -75,6 +76,7 @@ const initialState = ImmutableMap({
   reblogged_by: initialListState,
   favourited_by: initialListState,
   emoji_reactioned_by: initialListState,
+  referred_by: initialListState,
   follow_requests: initialListState,
   blocks: initialListState,
   mutes: initialListState,
@@ -141,6 +143,8 @@ export default function userLists(state = initialState, action) {
     return state.setIn(['favourited_by', action.id], ImmutableList(action.accounts.map(item => item.id)));
   case EMOJI_REACTIONS_FETCH_SUCCESS:
     return state.setIn(['emoji_reactioned_by', action.id], ImmutableList(action.accounts));
+  case STATUS_REFERENCES_FETCH_SUCCESS:
+    return state.setIn(['referred_by', action.id], ImmutableList(action.statuses.map(item => item.id)));
   case NOTIFICATIONS_UPDATE:
     return action.notification.type === 'follow_request' ? normalizeFollowRequest(state, action.notification) : state;
   case FOLLOW_REQUESTS_FETCH_SUCCESS:
diff --git a/config/routes/api.rb b/config/routes/api.rb
index 57543be8fb..9f01253d8c 100644
--- a/config/routes/api.rb
+++ b/config/routes/api.rb
@@ -12,6 +12,7 @@ namespace :api, format: false do
         resources :favourited_by, controller: :favourited_by_accounts, only: :index
         resources :emoji_reactioned_by, controller: :emoji_reactioned_by_accounts, only: :index
         resources :emoji_reactioned_by_slim, controller: :emoji_reactioned_by_accounts_slim, only: :index
+        resources :referred_by, controller: :referred_by_statuses, only: :index
         resource :reblog, only: :create
         post :unreblog, to: 'reblogs#destroy'