import 'dart:async'; import 'package:flutter/material.dart'; import 'package:animations/animations.dart'; import 'package:flutter_gen/gen_l10n/l10n.dart'; import 'package:matrix/matrix.dart'; import 'package:fluffychat/pages/chat_list/chat_list.dart'; import 'package:fluffychat/pages/chat_list/chat_list_item.dart'; import 'package:fluffychat/pages/chat_list/spaces_bottom_bar.dart'; import 'package:fluffychat/pages/chat_list/stories_header.dart'; import '../../utils/stream_extension.dart'; import '../../widgets/matrix.dart'; class ChatListViewBody extends StatefulWidget { final ChatListController controller; const ChatListViewBody(this.controller, {Key? key}) : super(key: key); @override State createState() => _ChatListViewBodyState(); } class _ChatListViewBodyState extends State { // the matrix sync stream late StreamSubscription _subscription; late StreamSubscription _clientSubscription; // used to check the animation direction String? _lastUserId; String? _lastSpaceId; @override void initState() { _subscription = Matrix.of(context) .client .onSync .stream .where((s) => s.hasRoomUpdate) .rateLimit(const Duration(seconds: 1)) .listen((d) => setState(() {})); _clientSubscription = widget.controller.clientStream.listen((d) => setState(() {})); super.initState(); } @override Widget build(BuildContext context) { final reversed = !_animationReversed(); Widget child; if (widget.controller.waitForFirstSync && Matrix.of(context).client.prevBatch != null) { final rooms = widget.controller.activeSpacesEntry.getRooms(context); if (rooms.isEmpty) { child = Column( key: const ValueKey(null), mainAxisAlignment: MainAxisAlignment.center, mainAxisSize: MainAxisSize.min, children: [ Image.asset( 'assets/private_chat_wallpaper.png', width: 160, height: 160, ), Center( child: Text( L10n.of(context)!.startYourFirstChat, textAlign: TextAlign.start, style: const TextStyle( color: Colors.grey, fontSize: 16, ), ), ), ], ); } else { final displayStoriesHeader = widget.controller.activeSpacesEntry .shouldShowStoriesHeader(context); child = ListView.builder( key: ValueKey(Matrix.of(context).client.userID.toString() + widget.controller.activeSpaceId.toString() + widget.controller.activeSpacesEntry.runtimeType.toString()), controller: widget.controller.scrollController, // add +1 space below in order to properly scroll below the spaces bar itemCount: rooms.length + (displayStoriesHeader ? 2 : 1), itemBuilder: (BuildContext context, int i) { if (displayStoriesHeader) { if (i == 0) { return const StoriesHeader(); } i--; } if (i >= rooms.length) { return const ListTile(); } return ChatListItem( rooms[i], selected: widget.controller.selectedRoomIds.contains(rooms[i].id), onTap: widget.controller.selectMode == SelectMode.select ? () => widget.controller.toggleSelection(rooms[i].id) : null, onLongPress: () => widget.controller.toggleSelection(rooms[i].id), activeChat: widget.controller.activeChat == rooms[i].id, ); }, ); } } else { const dummyChatCount = 5; final titleColor = Theme.of(context).textTheme.bodyText1!.color!.withAlpha(100); final subtitleColor = Theme.of(context).textTheme.bodyText1!.color!.withAlpha(50); child = ListView.builder( itemCount: dummyChatCount, itemBuilder: (context, i) => Opacity( opacity: (dummyChatCount - i) / dummyChatCount, child: ListTile( leading: CircleAvatar( backgroundColor: titleColor, child: CircularProgressIndicator( strokeWidth: 1, color: Theme.of(context).textTheme.bodyText1!.color, ), ), title: Row( children: [ Expanded( child: Container( height: 14, decoration: BoxDecoration( color: titleColor, borderRadius: BorderRadius.circular(3), ), ), ), const SizedBox(width: 36), Container( height: 14, width: 14, decoration: BoxDecoration( color: subtitleColor, borderRadius: BorderRadius.circular(14), ), ), const SizedBox(width: 12), Container( height: 14, width: 14, decoration: BoxDecoration( color: subtitleColor, borderRadius: BorderRadius.circular(14), ), ), ], ), subtitle: Container( decoration: BoxDecoration( color: subtitleColor, borderRadius: BorderRadius.circular(3), ), height: 12, margin: const EdgeInsets.only(right: 22), ), ), ), ); } return PageTransitionSwitcher( reverse: reversed, transitionBuilder: ( Widget child, Animation primaryAnimation, Animation secondaryAnimation, ) { return SharedAxisTransition( animation: primaryAnimation, secondaryAnimation: secondaryAnimation, transitionType: widget.controller.snappingSheetController.currentPosition == kSpacesBottomBarHeight ? SharedAxisTransitionType.horizontal : SharedAxisTransitionType.vertical, fillColor: Theme.of(context).scaffoldBackgroundColor, child: child, ); }, child: child, ); } @override void dispose() { _subscription.cancel(); _clientSubscription.cancel(); super.dispose(); } bool _animationReversed() { bool reversed; // in case the matrix id changes, check the indexOf the matrix id final newClient = Matrix.of(context).client; if (_lastUserId != newClient.userID) { reversed = Matrix.of(context) .currentBundle! .indexWhere((element) => element!.userID == _lastUserId) < Matrix.of(context) .currentBundle! .indexWhere((element) => element!.userID == newClient.userID); } // otherwise, the space changed... else { reversed = widget.controller.spaces .indexWhere((element) => element.id == _lastSpaceId) < widget.controller.spaces.indexWhere( (element) => element.id == widget.controller.activeSpaceId); } _lastUserId = newClient.userID; _lastSpaceId = widget.controller.activeSpaceId; return reversed; } }