Fix #38 - Unread indicator when new content appears above the fold

app/assets/javascripts/components/actions/notifications.jsx

@@ -15,6 +15,7 @@ export const NOTIFICATIONS_EXPAND_SUCCESS = 'NOTIFICATIONS_EXPAND_SUCCESS';
 export const NOTIFICATIONS_EXPAND_FAIL    = 'NOTIFICATIONS_EXPAND_FAIL';
 
 export const NOTIFICATIONS_CLEAR      = 'NOTIFICATIONS_CLEAR';
+export const NOTIFICATIONS_SCROLL_TOP = 'NOTIFICATIONS_SCROLL_TOP';
 
 const fetchRelatedRelationships = (dispatch, notifications) => {
   const accountIds = notifications.filter(item => item.type === 'follow').map(item => item.account.id);
@@ -151,3 +152,10 @@ export function clearNotifications() {
     api(getState).post('/api/v1/notifications/clear');
   };
 };
+
+export function scrollTopNotifications(top) {
+  return {
+    type: NOTIFICATIONS_SCROLL_TOP,
+    top
+  };
+};

app/assets/javascripts/components/components/status_list.jsx

@@ -14,6 +14,7 @@ const StatusList = React.createClass({
     onScroll: React.PropTypes.func,
     trackScroll: React.PropTypes.bool,
     isLoading: React.PropTypes.bool,
+    isUnread: React.PropTypes.bool,
     prepend: React.PropTypes.node,
     emptyMessage: React.PropTypes.node
   },
@@ -72,18 +73,25 @@ const StatusList = React.createClass({
   },
 
   render () {
-    const { statusIds, onScrollToBottom, trackScroll, isLoading, prepend, emptyMessage } = this.props;
+    const { statusIds, onScrollToBottom, trackScroll, isLoading, isUnread, prepend, emptyMessage } = this.props;
 
     let loadMore       = '';
     let scrollableArea = '';
+    let unread         = '';
 
     if (!isLoading && statusIds.size > 0) {
       loadMore = <LoadMore onClick={this.handleLoadMore} />;
     }
 
+    if (isUnread) {
+      unread = <div className='status-list__unread-indicator' />;
+    }
+
     if (isLoading || statusIds.size > 0 || !emptyMessage) {
       scrollableArea = (
         <div className='scrollable' ref={this.setRef}>
+          {unread}
+
           <div>
             {prepend}
 

app/assets/javascripts/components/features/account/components/header.jsx

@@ -14,7 +14,7 @@ const messages = defineMessages({
 const Header = React.createClass({
 
   propTypes: {
-    account: ImmutablePropTypes.map.isRequired,
+    account: ImmutablePropTypes.map,
     me: React.PropTypes.number.isRequired,
     onFollow: React.PropTypes.func.isRequired,
     intl: React.PropTypes.object.isRequired
@@ -25,6 +25,10 @@ const Header = React.createClass({
   render () {
     const { account, me, intl } = this.props;
 
+    if (!account) {
+      return null;
+    }
+
     let displayName = account.get('display_name');
     let info        = '';
     let actionBtn   = '';

app/assets/javascripts/components/features/notifications/index.jsx

@@ -2,7 +2,7 @@ import { connect } from 'react-redux';
 import PureRenderMixin from 'react-addons-pure-render-mixin';
 import ImmutablePropTypes from 'react-immutable-proptypes';
 import Column from '../ui/components/column';
-import { expandNotifications, clearNotifications } from '../../actions/notifications';
+import { expandNotifications, clearNotifications, scrollTopNotifications } from '../../actions/notifications';
 import NotificationContainer from './containers/notification_container';
 import { ScrollContainer } from 'react-router-scroll';
 import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
@@ -23,7 +23,8 @@ const getNotifications = createSelector([
 
 const mapStateToProps = state => ({
   notifications: getNotifications(state),
-  isLoading: state.getIn(['notifications', 'isLoading'], true)
+  isLoading: state.getIn(['notifications', 'isLoading'], true),
+  isUnread: state.getIn(['notifications', 'unread']) > 0
 });
 
 const Notifications = React.createClass({
@@ -33,7 +34,8 @@ const Notifications = React.createClass({
     dispatch: React.PropTypes.func.isRequired,
     trackScroll: React.PropTypes.bool,
     intl: React.PropTypes.object.isRequired,
-    isLoading: React.PropTypes.bool
+    isLoading: React.PropTypes.bool,
+    isUnread: React.PropTypes.bool
   },
 
   getDefaultProps () {
@@ -51,6 +53,10 @@ const Notifications = React.createClass({
 
     if (250 > offset && !this.props.isLoading) {
       this.props.dispatch(expandNotifications());
+    } else if (scrollTop < 100) {
+      this.props.dispatch(scrollTopNotifications(true));
+    } else {
+      this.props.dispatch(scrollTopNotifications(false));
     }
   },
 
@@ -74,18 +80,25 @@ const Notifications = React.createClass({
   },
 
   render () {
-    const { intl, notifications, trackScroll, isLoading } = this.props;
+    const { intl, notifications, trackScroll, isLoading, isUnread } = this.props;
 
     let loadMore       = '';
     let scrollableArea = '';
+    let unread         = '';
 
     if (!isLoading && notifications.size > 0) {
       loadMore = <LoadMore onClick={this.handleLoadMore} />;
     }
 
+    if (isUnread) {
+      unread = <div className='notifications__unread-indicator' />;
+    }
+
     if (isLoading || notifications.size > 0) {
       scrollableArea = (
         <div className='scrollable' onScroll={this.handleScroll} ref={this.setRef}>
+          {unread}
+
           <div>
             {notifications.map(item => <NotificationContainer key={item.get('id')} notification={item} accountId={item.get('account')} />)}
             {loadMore}
@@ -102,7 +115,7 @@ const Notifications = React.createClass({
 
     if (trackScroll) {
       return (
-        <Column icon='bell' heading={intl.formatMessage(messages.title)}>
+        <Column icon='bell' active={isUnread} heading={intl.formatMessage(messages.title)}>
           <ColumnSettingsContainer />
           <ClearColumnButton onClick={this.handleClear} />
           <ScrollContainer scrollKey='notifications'>
@@ -112,7 +125,7 @@ const Notifications = React.createClass({
       );
     } else {
       return (
-        <Column icon='bell' heading={intl.formatMessage(messages.title)}>
+        <Column icon='bell' active={isUnread} heading={intl.formatMessage(messages.title)}>
           <ColumnSettingsContainer />
           <ClearColumnButton onClick={this.handleClear} />
           {scrollableArea}

app/assets/javascripts/components/features/ui/components/column.jsx

@@ -34,7 +34,8 @@ const Column = React.createClass({
   propTypes: {
     heading: React.PropTypes.string,
     icon: React.PropTypes.string,
-    children: React.PropTypes.node
+    children: React.PropTypes.node,
+    active: React.PropTypes.bool
   },
 
   mixins: [PureRenderMixin],
@@ -51,12 +52,12 @@ const Column = React.createClass({
   },
 
   render () {
-    const { heading, icon, children } = this.props;
+    const { heading, icon, children, active } = this.props;
 
     let header = '';
 
     if (heading) {
-      header = <ColumnHeader icon={icon} type={heading} onClick={this.handleHeaderClick} />;
+      header = <ColumnHeader icon={icon} active={active} type={heading} onClick={this.handleHeaderClick} />;
     }
 
     return (

app/assets/javascripts/components/features/ui/components/column_header.jsx

@@ -5,6 +5,7 @@ const ColumnHeader = React.createClass({
   propTypes: {
     icon: React.PropTypes.string,
     type: React.PropTypes.string,
+    active: React.PropTypes.bool,
     onClick: React.PropTypes.func
   },
 
@@ -15,6 +16,8 @@ const ColumnHeader = React.createClass({
   },
 
   render () {
+    const { type, active } = this.props;
+
     let icon = '';
 
     if (this.props.icon) {
@@ -22,9 +25,9 @@ const ColumnHeader = React.createClass({
     }
 
     return (
-      <div className='column-header' onClick={this.handleClick}>
+      <div className={`column-header ${active ? 'active' : ''}`} onClick={this.handleClick}>
         {icon}
-        {this.props.type}
+        {type}
       </div>
     );
   }

app/assets/javascripts/components/features/ui/containers/status_list_container.jsx

@@ -5,7 +5,7 @@ import Immutable from 'immutable';
 import { createSelector } from 'reselect';
 import { debounce } from 'react-decoration';
 
-const getStatusIds = createSelector([
+const makeGetStatusIds = () => createSelector([
   (state, { type }) => state.getIn(['settings', type], Immutable.Map()),
   (state, { type }) => state.getIn(['timelines', type, 'items'], Immutable.List()),
   (state)           => state.get('statuses'),
@@ -34,10 +34,17 @@ const getStatusIds = createSelector([
   return showStatus;
 }));
 
-const mapStateToProps = (state, props) => ({
+const makeMapStateToProps = () => {
+  const getStatusIds = makeGetStatusIds();
+
+  const mapStateToProps = (state, props) => ({
     statusIds: getStatusIds(state, props),
-  isLoading: state.getIn(['timelines', props.type, 'isLoading'], true)
+    isLoading: state.getIn(['timelines', props.type, 'isLoading'], true),
-});
+    isUnread: state.getIn(['timelines', props.type, 'unread']) > 0
+  });
+
+  return mapStateToProps;
+};
 
 const mapDispatchToProps = (dispatch, { type, id }) => ({
 
@@ -59,4 +66,4 @@ const mapDispatchToProps = (dispatch, { type, id }) => ({
 
 });
 
-export default connect(mapStateToProps, mapDispatchToProps)(StatusList);
+export default connect(makeMapStateToProps, mapDispatchToProps)(StatusList);

app/assets/javascripts/components/reducers/notifications.jsx

@@ -6,7 +6,8 @@ import {
   NOTIFICATIONS_EXPAND_REQUEST,
   NOTIFICATIONS_REFRESH_FAIL,
   NOTIFICATIONS_EXPAND_FAIL,
-  NOTIFICATIONS_CLEAR
+  NOTIFICATIONS_CLEAR,
+  NOTIFICATIONS_SCROLL_TOP
 } from '../actions/notifications';
 import { ACCOUNT_BLOCK_SUCCESS } from '../actions/accounts';
 import Immutable from 'immutable';
@@ -14,6 +15,8 @@ import Immutable from 'immutable';
 const initialState = Immutable.Map({
   items: Immutable.List(),
   next: null,
+  top: true,
+  unread: 0,
   loaded: false,
   isLoading: true
 });
@@ -26,6 +29,10 @@ const notificationToMap = notification => Immutable.Map({
 });
 
 const normalizeNotification = (state, notification) => {
+  if (!state.get('top')) {
+    state = state.update('unread', unread => unread + 1);
+  }
+
   return state.update('items', list => list.unshift(notificationToMap(notification)));
 };
 
@@ -64,6 +71,14 @@ const filterNotifications = (state, relationship) => {
   return state.update('items', list => list.filterNot(item => item.get('account') === relationship.id));
 };
 
+const updateTop = (state, top) => {
+  if (top) {
+    state = state.set('unread', 0);
+  }
+
+  return state.set('top', top);
+};
+
 export default function notifications(state = initialState, action) {
   switch(action.type) {
   case NOTIFICATIONS_REFRESH_REQUEST:
@@ -71,6 +86,8 @@ export default function notifications(state = initialState, action) {
   case NOTIFICATIONS_REFRESH_FAIL:
   case NOTIFICATIONS_EXPAND_FAIL:
     return state.set('isLoading', true);
+  case NOTIFICATIONS_SCROLL_TOP:
+    return updateTop(state, action.top);
   case NOTIFICATIONS_UPDATE:
     return normalizeNotification(state, action.notification);
   case NOTIFICATIONS_REFRESH_SUCCESS:

app/assets/javascripts/components/reducers/timelines.jsx

@@ -36,6 +36,7 @@ const initialState = Immutable.Map({
     isLoading: false,
     loaded: false,
     top: true,
+    unread: 0,
     items: Immutable.List()
   }),
 
@@ -45,6 +46,7 @@ const initialState = Immutable.Map({
     isLoading: false,
     loaded: false,
     top: true,
+    unread: 0,
     items: Immutable.List()
   }),
 
@@ -55,6 +57,7 @@ const initialState = Immutable.Map({
     isLoading: false,
     loaded: false,
     top: true,
+    unread: 0,
     items: Immutable.List()
   }),
 
@@ -65,6 +68,7 @@ const initialState = Immutable.Map({
     id: null,
     loaded: false,
     top: true,
+    unread: 0,
     items: Immutable.List()
   }),
 
@@ -155,6 +159,10 @@ const updateTimeline = (state, timeline, status, references) => {
 
   state = normalizeStatus(state, status);
 
+  if (!top) {
+    state = state.updateIn([timeline, 'unread'], unread => unread + 1);
+  }
+
   state = state.updateIn([timeline, 'items'], Immutable.List(), list => {
     if (top && list.size > 40) {
       list = list.take(20);
@@ -249,6 +257,14 @@ const resetTimeline = (state, timeline, id) => {
   return state;
 };
 
+const updateTop = (state, timeline, top) => {
+  if (top) {
+    state = state.setIn([timeline, 'unread'], 0);
+  }
+
+  return state.setIn([timeline, 'top'], top);
+};
+
 export default function timelines(state = initialState, action) {
   switch(action.type) {
   case TIMELINE_REFRESH_REQUEST:
@@ -280,7 +296,7 @@ export default function timelines(state = initialState, action) {
   case ACCOUNT_BLOCK_SUCCESS:
     return filterTimelines(state, action.relationship, action.statuses);
   case TIMELINE_SCROLL_TOP:
-    return state.setIn([action.timeline, 'top'], action.top);
+    return updateTop(state, action.timeline, action.top);
   default:
     return state;
   }

app/assets/stylesheets/components.scss

@@ -1079,6 +1079,11 @@ button.active i.fa-retweet {
   background: lighten($color1, 4%);
   flex: 0 0 auto;
   cursor: pointer;
+
+  &.active {
+    color: $color4;
+    text-shadow: 0 0 10px rgba($color4, 0.4);
+  }
 }
 
 .search {
@@ -1201,3 +1206,14 @@ button.active i.fa-retweet {
     }
   }
 }
+
+.status-list__unread-indicator, .notifications__unread-indicator {
+  position: absolute;
+  top: 48px;
+  left: 0;
+  width: 100%;
+  pointer-events: none;
+  height: 30px;
+  z-index: 2;
+  background: linear-gradient(to bottom, rgba($color4, 0.3) 0%, rgba($color4, 0) 60%);
+}