Added new marker Badge for Report unread messages

src/languages/en.js

@@ -135,6 +135,9 @@ export default {
     reportActionsView: {
         beFirstPersonToComment: 'Be the first person to comment',
     },
+    reportActionsViewMarkerBadge: {
+        newMsg: ({count}) => `${count} new message${count > 1 ? 's' : ''}`,
+    },
     reportTypingIndicator: {
         isTyping: 'is typing...',
         areTyping: 'are typing...',

src/languages/es.js

@@ -135,6 +135,9 @@ export default {
     reportActionsView: {
         beFirstPersonToComment: 'Sé el primero en comentar',
     },
+    reportActionsViewMarkerBadge: {
+        newMsg: ({count}) => `${count} nuevo${count > 1 ? 's' : ''} mensaje${count > 1 ? 's' : ''}`,
+    },
     reportTypingIndicator: {
         isTyping: 'está escribiendo...',
         areTyping: 'están escribiendo...',

src/pages/home/ReportScreen.js

@@ -132,7 +132,10 @@ class ReportScreen extends React.Component {
                     onNavigationMenuButtonClicked={() => Navigation.navigate(ROUTES.HOME)}
                 />
 
-                <View nativeID={CONST.REPORT.DROP_NATIVE_ID} style={[styles.flex1, styles.justifyContentEnd]}>
+                <View
+                    nativeID={CONST.REPORT.DROP_NATIVE_ID}
+                    style={[styles.flex1, styles.justifyContentEnd, styles.overflowHidden]}
+                >
                     <FullScreenLoadingIndicator visible={this.shouldShowLoader()} />
                     {!this.shouldShowLoader() && <ReportActionsView reportID={reportID} />}
                     {this.props.session.shouldShowComposeInput && (

src/pages/home/report/MarkerBadge.js

@@ -0,0 +1,125 @@
+import React, {PureComponent} from 'react';
+import {Animated, Text, View} from 'react-native';
+import PropTypes from 'prop-types';
+import styles from '../../../styles/styles';
+import Button from '../../../components/Button';
+import Icon from '../../../components/Icon';
+import {Close, DownArrow} from '../../../components/Icon/Expensicons';
+import themeColors from '../../../styles/themes/default';
+import withLocalize, {withLocalizePropTypes} from '../../../components/withLocalize';
+
+const MARKER_NOT_ACTIVE_TRANSLATE_Y = -30;
+const MARKER_ACTIVE_TRANSLATE_Y = 10;
+const propTypes = {
+    /** Count of new messages to show in the badge */
+    count: PropTypes.number,
+
+    /** Whether the marker is active */
+    active: PropTypes.bool,
+
+    /** Callback to be called when user closes the badge */
+    onClose: PropTypes.func,
+
+    /** Callback to be called when user clicks the marker */
+    onClick: PropTypes.func,
+
+    ...withLocalizePropTypes,
+};
+const defaultProps = {
+    count: 0,
+    active: false,
+    onClose: () => {},
+    onClick: () => {},
+};
+class MarkerBadge extends PureComponent {
+    constructor(props) {
+        super(props);
+        this.translateY = new Animated.Value(MARKER_NOT_ACTIVE_TRANSLATE_Y);
+        this.show = this.show.bind(this);
+        this.hide = this.hide.bind(this);
+    }
+
+    componentDidUpdate() {
+        if (this.props.active && this.props.count > 0) {
+            this.show();
+        } else {
+            this.hide();
+        }
+    }
+
+    show() {
+        Animated.spring(this.translateY, {
+            toValue: MARKER_ACTIVE_TRANSLATE_Y,
+            duration: 80,
+            useNativeDriver: true,
+        }).start();
+    }
+
+    hide() {
+        Animated.spring(this.translateY, {
+            toValue: MARKER_NOT_ACTIVE_TRANSLATE_Y,
+            duration: 80,
+            useNativeDriver: true,
+        }).start();
+    }
+
+    render() {
+        return (
+            <View style={styles.reportMarkerBadgeWrapper}>
+                <Animated.View style={[
+                    styles.reportMarkerBadge,
+                    styles.reportMarkerBadgeTransformation(this.translateY),
+                ]}
+                >
+                    <View style={[
+                        styles.flexRow,
+                        styles.justifyContentBetween,
+                        styles.alignItemsCenter,
+                    ]}
+                    >
+                        <Button
+                            success
+                            small
+                            onPress={this.props.onClick}
+                            ContentComponent={() => (
+                                <View style={[styles.flexRow]}>
+                                    <Icon small src={DownArrow} fill={themeColors.textReversed} />
+                                    <Text
+                                        selectable={false}
+                                        style={[
+                                            styles.ml2,
+                                            styles.buttonSmallText,
+                                            styles.textWhite,
+                                        ]}
+                                    >
+                                        {this.props.translate(
+                                            'reportActionsViewMarkerBadge.newMsg',
+                                            {count: this.props.count},
+                                        )}
+                                    </Text>
+                                </View>
+                            )}
+                            shouldRemoveRightBorderRadius
+                        />
+                        <Button
+                            success
+                            small
+                            style={[styles.buttonDropdown]}
+                            onPress={this.props.onClose}
+                            shouldRemoveLeftBorderRadius
+                            ContentComponent={() => (
+                                <Icon small src={Close} fill={themeColors.textReversed} />
+                            )}
+                        />
+                    </View>
+                </Animated.View>
+            </View>
+        );
+    }
+}
+
+MarkerBadge.propTypes = propTypes;
+MarkerBadge.defaultProps = defaultProps;
+MarkerBadge.displayName = 'MarkerBadge';
+
+export default withLocalize(MarkerBadge);

src/pages/home/report/ReportActionsView.js

@@ -37,6 +37,7 @@ import ReportActionComposeFocusManager from '../../../libs/ReportActionComposeFo
 import {contextMenuRef} from './ContextMenu/ReportActionContextMenu';
 import PopoverReportActionContextMenu from './ContextMenu/PopoverReportActionContextMenu';
 import variables from '../../../styles/variables';
+import MarkerBadge from './MarkerBadge';
 
 const propTypes = {
     /** The ID of the report actions will be created for */
@@ -99,11 +100,17 @@ class ReportActionsView extends React.Component {
 
         this.state = {
             isLoadingMoreChats: false,
+            isMarkerActive: false,
         };
 
+        this.currentScrollOffset = 0;
         this.updateSortedReportActions(props.reportActions);
         this.updateMostRecentIOUReportActionNumber(props.reportActions);
         this.keyExtractor = this.keyExtractor.bind(this);
+        this.trackScroll = this.trackScroll.bind(this);
+        this.showMarker = this.showMarker.bind(this);
+        this.hideMarker = this.hideMarker.bind(this);
+        this.toggleMarker = this.toggleMarker.bind(this);
     }
 
     componentDidMount() {
@@ -152,6 +159,10 @@ class ReportActionsView extends React.Component {
             return true;
         }
 
+        if (nextState.isMarkerActive !== this.state.isMarkerActive) {
+            return true;
+        }
+
         if (this.props.isSmallScreenWidth !== nextProps.isSmallScreenWidth) {
             return true;
         }
@@ -189,6 +200,9 @@ class ReportActionsView extends React.Component {
             if (shouldRecordMaxAction) {
                 updateLastReadActionID(this.props.reportID);
             }
+
+            // show new MarkerBadge when there is a new Message
+            this.toggleMarker();
         }
 
         // We want to mark the unread comments when user resize the screen to desktop
@@ -346,6 +360,43 @@ class ReportActionsView extends React.Component {
         updateLastReadActionID(this.props.reportID);
     }
 
+    /**
+     * Show/hide the new MarkerBadge when user is scrolling back/forth in the history of messages.
+     */
+    toggleMarker() {
+        if (this.currentScrollOffset < -200 && !this.state.isMarkerActive) {
+            this.showMarker();
+        }
+
+        if (this.currentScrollOffset > -200 && this.state.isMarkerActive) {
+            this.hideMarker();
+        }
+    }
+
+    /**
+     * Show the new MarkerBadge
+     */
+    showMarker() {
+        this.setState({isMarkerActive: true});
+    }
+
+    /**
+     * Hide the new MarkerBadge
+     */
+    hideMarker() {
+        this.setState({isMarkerActive: false});
+    }
+
+    /**
+     * keeps track of the Scroll offset of the main messages list
+     *
+     * @param {Object} {nativeEvent}
+     */
+    trackScroll({nativeEvent}) {
+        this.currentScrollOffset = -nativeEvent.contentOffset.y;
+        this.toggleMarker();
+    }
+
     /**
      * Runs when the FlatList finishes laying out
      */
@@ -427,6 +478,12 @@ class ReportActionsView extends React.Component {
 
         return (
             <>
+                <MarkerBadge
+                    active={this.state.isMarkerActive}
+                    count={this.props.report.unreadActionCount}
+                    onClick={scrollToBottom}
+                    onClose={this.hideMarker}
+                />
                 <InvertedFlatList
                     ref={flatListRef}
                     data={this.sortedReportActions}
@@ -443,6 +500,7 @@ class ReportActionsView extends React.Component {
                         : null}
                     keyboardShouldPersistTaps="handled"
                     onLayout={this.recordTimeToMeasureItemLayout}
+                    onScroll={this.trackScroll}
                 />
                 <PopoverReportActionContextMenu ref={contextMenuRef} />
             </>

src/styles/styles.js

@@ -15,6 +15,7 @@ import textInputAlignSelf from './utilities/textInputAlignSelf';
 import CONST from '../CONST';
 import positioning from './utilities/positioning';
 import codeStyles from './codeStyles';
+import visibility from './utilities/visibility';
 
 const expensiPicker = {
     backgroundColor: 'transparent',
@@ -249,7 +250,8 @@ const styles = {
     },
 
     buttonDropdown: {
-        marginLeft: 1,
+        borderLeftWidth: 1,
+        borderColor: themeColors.textReversed,
     },
 
     noRightBorderRadius: {
@@ -1984,6 +1986,25 @@ const styles = {
     communicationsLinkHeight: {
         height: 20,
     },
+
+    reportMarkerBadgeWrapper: {
+        position: 'absolute',
+        left: '50%',
+        top: 0,
+        zIndex: 100,
+        ...visibility('hidden'),
+    },
+
+    reportMarkerBadge: {
+        left: '-50%',
+        ...visibility('visible'),
+    },
+
+    reportMarkerBadgeTransformation: translateY => ({
+        transform: [
+            {translateY},
+        ],
+    }),
 };
 
 const baseCodeTagStyles = {

src/styles/utilities/visibility/index.js

@@ -0,0 +1 @@
+export default visibility => ({visibility});

src/styles/utilities/visibility/index.native.js

@@ -0,0 +1 @@
+export default () => ({});