mirror of
https://gitlab.com/veilid/veilidchat.git
synced 2024-12-15 02:54:18 -05:00
295 lines
12 KiB
Dart
295 lines
12 KiB
Dart
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import 'dart:math';
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import 'package:async_tools/async_tools.dart';
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import 'package:awesome_extensions/awesome_extensions.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter_bloc/flutter_bloc.dart';
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import 'package:flutter_chat_types/flutter_chat_types.dart' as types;
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import 'package:flutter_chat_ui/flutter_chat_ui.dart';
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import 'package:veilid_support/veilid_support.dart';
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import '../../account_manager/account_manager.dart';
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import '../../chat_list/chat_list.dart';
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import '../../theme/theme.dart';
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import '../chat.dart';
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const onEndReachedThreshold = 0.75;
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class ChatComponentWidget extends StatelessWidget {
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const ChatComponentWidget._({required super.key});
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// Builder wrapper function that takes care of state management requirements
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static Widget builder(
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{required TypedKey localConversationRecordKey, Key? key}) =>
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Builder(builder: (context) {
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// Get all watched dependendies
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final activeAccountInfo = context.watch<ActiveAccountInfo>();
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final accountRecordInfo =
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context.watch<AccountRecordCubit>().state.asData?.value;
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if (accountRecordInfo == null) {
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return debugPage('should always have an account record here');
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}
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final avconversation = context.select<ActiveConversationsBlocMapCubit,
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AsyncValue<ActiveConversationState>?>(
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(x) => x.state[localConversationRecordKey]);
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if (avconversation == null) {
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return waitingPage();
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}
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final activeConversationState = avconversation.asData?.value;
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if (activeConversationState == null) {
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return avconversation.buildNotData();
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}
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// Get the messages cubit
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final messagesCubit = context.select<
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ActiveSingleContactChatBlocMapCubit,
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SingleContactMessagesCubit?>(
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(x) => x.tryOperate(localConversationRecordKey,
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closure: (cubit) => cubit));
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if (messagesCubit == null) {
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return waitingPage();
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}
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// Make chat component state
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return BlocProvider(
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create: (context) => ChatComponentCubit.singleContact(
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activeAccountInfo: activeAccountInfo,
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accountRecordInfo: accountRecordInfo,
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activeConversationState: activeConversationState,
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messagesCubit: messagesCubit,
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),
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child: ChatComponentWidget._(key: key));
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});
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/////////////////////////////////////////////////////////////////////
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void _handleSendPressed(
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ChatComponentCubit chatComponentCubit, types.PartialText message) {
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final text = message.text;
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if (text.startsWith('/')) {
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chatComponentCubit.runCommand(text);
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return;
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}
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chatComponentCubit.sendMessage(message);
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}
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// void _handleAttachmentPressed() async {
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// //
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// }
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Future<void> _handlePageForward(
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ChatComponentCubit chatComponentCubit,
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WindowState<types.Message> messageWindow,
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ScrollNotification notification) async {
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print(
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'_handlePageForward: messagesState.length=${messageWindow.length} messagesState.windowTail=${messageWindow.windowTail} messagesState.windowCount=${messageWindow.windowCount} ScrollNotification=$notification');
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// Go forward a page
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final tail = min(messageWindow.length,
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messageWindow.windowTail + (messageWindow.windowCount ~/ 4)) %
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messageWindow.length;
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// Set follow
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final follow = messageWindow.length == 0 ||
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tail == 0; // xxx incorporate scroll position
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// final scrollOffset = (notification.metrics.maxScrollExtent -
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// notification.metrics.minScrollExtent) *
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// (1.0 - onEndReachedThreshold);
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// chatComponentCubit.scrollOffset = scrollOffset;
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await chatComponentCubit.setWindow(
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tail: tail, count: messageWindow.windowCount, follow: follow);
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// chatComponentCubit.state.scrollController.position.jumpTo(
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// chatComponentCubit.state.scrollController.offset + scrollOffset);
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//chatComponentCubit.scrollOffset = 0;
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}
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Future<void> _handlePageBackward(
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ChatComponentCubit chatComponentCubit,
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WindowState<types.Message> messageWindow,
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ScrollNotification notification,
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) async {
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print(
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'_handlePageBackward: messagesState.length=${messageWindow.length} messagesState.windowTail=${messageWindow.windowTail} messagesState.windowCount=${messageWindow.windowCount} ScrollNotification=$notification');
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// Go back a page
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final tail = max(
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messageWindow.windowCount,
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(messageWindow.windowTail - (messageWindow.windowCount ~/ 4)) %
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messageWindow.length);
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// Set follow
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final follow = messageWindow.length == 0 ||
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tail == 0; // xxx incorporate scroll position
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// final scrollOffset = -(notification.metrics.maxScrollExtent -
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// notification.metrics.minScrollExtent) *
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// (1.0 - onEndReachedThreshold);
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// chatComponentCubit.scrollOffset = scrollOffset;
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await chatComponentCubit.setWindow(
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tail: tail, count: messageWindow.windowCount, follow: follow);
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// chatComponentCubit.scrollOffset = scrollOffset;
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// chatComponentCubit.state.scrollController.position.jumpTo(
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// chatComponentCubit.state.scrollController.offset + scrollOffset);
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//chatComponentCubit.scrollOffset = 0;
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}
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@override
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Widget build(BuildContext context) {
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final theme = Theme.of(context);
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final scale = theme.extension<ScaleScheme>()!;
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final textTheme = Theme.of(context).textTheme;
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final chatTheme = makeChatTheme(scale, textTheme);
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// Get the enclosing chat component cubit that contains our state
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// (created by ChatComponentWidget.builder())
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final chatComponentCubit = context.watch<ChatComponentCubit>();
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final chatComponentState = chatComponentCubit.state;
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final messageWindow = chatComponentState.messageWindow.asData?.value;
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if (messageWindow == null) {
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return chatComponentState.messageWindow.buildNotData();
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}
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final isLastPage = messageWindow.windowStart == 0;
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final isFirstPage = messageWindow.windowEnd == messageWindow.length - 1;
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final title = chatComponentState.title;
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if (chatComponentCubit.scrollOffset != 0) {
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chatComponentState.scrollController.position.correctPixels(
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chatComponentState.scrollController.position.pixels +
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chatComponentCubit.scrollOffset);
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chatComponentCubit.scrollOffset = 0;
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}
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return DefaultTextStyle(
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style: textTheme.bodySmall!,
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child: Align(
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alignment: AlignmentDirectional.centerEnd,
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child: Stack(
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children: [
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Column(
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children: [
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Container(
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height: 48,
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decoration: BoxDecoration(
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color: scale.primaryScale.subtleBorder,
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),
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child: Row(children: [
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Align(
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alignment: AlignmentDirectional.centerStart,
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child: Padding(
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padding: const EdgeInsetsDirectional.fromSTEB(
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16, 0, 16, 0),
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child: Text(title,
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textAlign: TextAlign.start,
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style: textTheme.titleMedium!.copyWith(
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color: scale.primaryScale.borderText)),
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)),
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const Spacer(),
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IconButton(
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icon: Icon(Icons.close,
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color: scale.primaryScale.borderText),
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onPressed: () async {
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context.read<ActiveChatCubit>().setActiveChat(null);
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}).paddingLTRB(16, 0, 16, 0)
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]),
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),
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Expanded(
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child: DecoratedBox(
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decoration: const BoxDecoration(),
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child: NotificationListener<ScrollNotification>(
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onNotification: (notification) {
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if (chatComponentCubit.scrollOffset != 0) {
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return false;
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}
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if (!isFirstPage &&
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notification.metrics.pixels <=
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((notification.metrics.maxScrollExtent -
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notification
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.metrics.minScrollExtent) *
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(1.0 - onEndReachedThreshold) +
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notification.metrics.minScrollExtent)) {
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//
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final scrollOffset = (notification
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.metrics.maxScrollExtent -
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notification.metrics.minScrollExtent) *
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(1.0 - onEndReachedThreshold);
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chatComponentCubit.scrollOffset = scrollOffset;
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//
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singleFuture(chatComponentState.chatKey,
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() async {
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await _handlePageForward(chatComponentCubit,
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messageWindow, notification);
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});
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} else if (!isLastPage &&
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notification.metrics.pixels >=
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((notification.metrics.maxScrollExtent -
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notification
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.metrics.minScrollExtent) *
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onEndReachedThreshold +
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notification.metrics.minScrollExtent)) {
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//
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final scrollOffset = -(notification
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.metrics.maxScrollExtent -
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notification.metrics.minScrollExtent) *
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(1.0 - onEndReachedThreshold);
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chatComponentCubit.scrollOffset = scrollOffset;
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//
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singleFuture(chatComponentState.chatKey,
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() async {
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await _handlePageBackward(chatComponentCubit,
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messageWindow, notification);
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});
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}
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return false;
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},
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child: Chat(
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key: chatComponentState.chatKey,
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theme: chatTheme,
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messages: messageWindow.window.toList(),
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scrollToBottomOnSend: isFirstPage,
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scrollController:
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chatComponentState.scrollController,
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// isLastPage: isLastPage,
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// onEndReached: () async {
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// await _handlePageBackward(
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// chatComponentCubit, messageWindow);
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// },
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//onEndReachedThreshold: onEndReachedThreshold,
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//onAttachmentPressed: _handleAttachmentPressed,
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//onMessageTap: _handleMessageTap,
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//onPreviewDataFetched: _handlePreviewDataFetched,
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onSendPressed: (pt) =>
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_handleSendPressed(chatComponentCubit, pt),
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//showUserAvatars: false,
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//showUserNames: true,
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user: chatComponentState.localUser,
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emptyState: const EmptyChatWidget())),
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),
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),
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],
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),
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],
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),
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));
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}
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}
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