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import * as React from 'react';
import ReactDOM from 'react-dom';
import { Component, View } from 'reactxp';
import { LiftedConstraint, RelayLocation } from '../../shared/daemon-rpc-types';
import { messages } from '../../shared/gettext';
import { IRelayLocationRedux } from '../redux/settings/reducers';
import { LocationScope } from '../redux/userinterface/reducers';
import BridgeLocations, { SpecialBridgeLocationType } from './BridgeLocations';
import CustomScrollbars from './CustomScrollbars';
import ExitLocations from './ExitLocations';
import { Container, Layout } from './Layout';
import LocationList, { LocationSelection, LocationSelectionType } from './LocationList';
import {
CloseBarItem,
NavigationBar,
NavigationContainer,
NavigationItems,
NavigationScrollbars,
ScopeBar,
ScopeBarItem,
TitleBarItem,
} from './NavigationBar';
import styles from './SelectLocationStyles';
import { HeaderSubTitle } from './SettingsHeader';
interface IProps {
locationScope: LocationScope;
selectedExitLocation?: RelayLocation;
selectedBridgeLocation?: LiftedConstraint<RelayLocation>;
relayLocations: IRelayLocationRedux[];
bridgeLocations: IRelayLocationRedux[];
allowBridgeSelection: boolean;
onClose: () => void;
onChangeLocationScope: (location: LocationScope) => void;
onSelectExitLocation: (location: RelayLocation) => void;
onSelectBridgeLocation: (location: RelayLocation) => void;
onSelectClosestToExit: () => void;
}
interface ISelectLocationSnapshot {
scrollPosition: [number, number];
expandedLocations: RelayLocation[];
}
export default class SelectLocation extends Component<IProps> {
private scrollView = React.createRef<CustomScrollbars>();
private selectedExitLocationRef = React.createRef<React.ReactInstance>();
private selectedBridgeLocationRef = React.createRef<React.ReactInstance>();
private exitLocationList = React.createRef<LocationList<never>>();
private bridgeLocationList = React.createRef<LocationList<SpecialBridgeLocationType>>();
private snapshotByScope: { [index: number]: ISelectLocationSnapshot } = {};
public componentDidMount() {
this.scrollToSelectedCell();
}
public componentDidUpdate(prevProps: IProps, _prevState: {}, snapshot?: ISelectLocationSnapshot) {
if (this.props.locationScope !== prevProps.locationScope) {
this.restoreScrollPosition(this.props.locationScope);
if (snapshot) {
this.snapshotByScope[prevProps.locationScope] = snapshot;
}
}
}
public getSnapshotBeforeUpdate(prevProps: IProps): ISelectLocationSnapshot | undefined {
const scrollView = this.scrollView.current;
const locationList =
prevProps.locationScope === LocationScope.relay
? this.exitLocationList.current
: this.bridgeLocationList.current;
if (scrollView && locationList) {
return {
scrollPosition: scrollView.getScrollPosition(),
expandedLocations: locationList.getExpandedLocations(),
};
} else {
return undefined;
}
}
public render() {
return (
<Layout>
<Container>
<View style={styles.select_location}>
<NavigationContainer>
<NavigationBar alwaysDisplayBarTitle={true}>
<NavigationItems>
<CloseBarItem action={this.props.onClose} />
<TitleBarItem>
{// TRANSLATORS: Title label in navigation bar
messages.pgettext('select-location-nav', 'Select location')}
</TitleBarItem>
</NavigationItems>
<View style={styles.navigationBarAttachment}>
<HeaderSubTitle>
{this.props.allowBridgeSelection
? messages.pgettext(
'select-location-view',
'While connected, your traffic will be routed through two secure locations, the entry point (a bridge server) and the exit point (a VPN server).',
)
: messages.pgettext(
'select-location-view',
'While connected, your real location is masked with a private and secure location in the selected region.',
)}
</HeaderSubTitle>
{this.props.allowBridgeSelection && (
<ScopeBar
style={styles.scopeBar}
defaultSelectedIndex={this.props.locationScope}
onChange={this.props.onChangeLocationScope}>
<ScopeBarItem>
{messages.pgettext('select-location-nav', 'Entry')}
</ScopeBarItem>
<ScopeBarItem>
{messages.pgettext('select-location-nav', 'Exit')}
</ScopeBarItem>
</ScopeBar>
)}
</View>
</NavigationBar>
<View style={styles.container}>
<NavigationScrollbars ref={this.scrollView}>
<View style={styles.content}>
{this.props.locationScope === LocationScope.relay ? (
<ExitLocations
ref={this.exitLocationList}
source={this.props.relayLocations}
defaultExpandedLocations={this.getExpandedLocationsFromSnapshot()}
selectedValue={this.props.selectedExitLocation}
selectedElementRef={this.selectedExitLocationRef}
onSelect={this.onSelectExitLocation}
/>
) : (
<BridgeLocations
ref={this.bridgeLocationList}
source={this.props.bridgeLocations}
defaultExpandedLocations={this.getExpandedLocationsFromSnapshot()}
selectedValue={this.props.selectedBridgeLocation}
selectedElementRef={this.selectedBridgeLocationRef}
onSelect={this.onSelectBridgeLocation}
/>
)}
</View>
</NavigationScrollbars>
</View>
</NavigationContainer>
</View>
</Container>
</Layout>
);
}
public restoreScrollPosition(scope: LocationScope) {
const snapshot = this.snapshotByScope[scope];
if (snapshot) {
this.scrollToPosition(...snapshot.scrollPosition);
} else {
this.scrollToSelectedCell();
}
}
private getExpandedLocationsFromSnapshot(): RelayLocation[] | undefined {
const snapshot = this.snapshotByScope[this.props.locationScope];
if (snapshot) {
return snapshot.expandedLocations;
} else {
return undefined;
}
}
private scrollToPosition(x: number, y: number) {
const scrollView = this.scrollView.current;
if (scrollView) {
scrollView.scrollTo(x, y);
}
}
private scrollToSelectedCell() {
const ref =
this.props.locationScope === LocationScope.relay
? this.selectedExitLocationRef.current
: this.selectedBridgeLocationRef.current;
const scrollView = this.scrollView.current;
if (scrollView) {
if (ref) {
const cellDOMNode = ReactDOM.findDOMNode(ref);
if (cellDOMNode instanceof HTMLElement) {
scrollView.scrollToElement(cellDOMNode, 'middle');
}
} else {
scrollView.scrollToTop();
}
}
}
private onSelectExitLocation = (location: LocationSelection<never>) => {
if (location.type === LocationSelectionType.relay) {
this.props.onSelectExitLocation(location.value);
}
};
private onSelectBridgeLocation = (location: LocationSelection<SpecialBridgeLocationType>) => {
if (location.type === LocationSelectionType.relay) {
this.props.onSelectBridgeLocation(location.value);
} else if (
location.type === LocationSelectionType.special &&
location.value === SpecialBridgeLocationType.closestToExit
) {
this.props.onSelectClosestToExit();
}
};
}
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