feat : MessageSearchListView
Signed-off-by: xsahil03x <[email protected]>
This commit is contained in:
xsahil03x
@@ -0,0 +1,305 @@
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import 'dart:convert';
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import 'package:flutter/material.dart';
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import 'package:stream_chat/stream_chat.dart';
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import 'package:stream_chat_flutter/src/message_search_item.dart';
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import 'lazy_load_scroll_view.dart';
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import 'message_search_bloc.dart';
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class MessageSearchListView extends StatefulWidget {
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final String messageQuery;
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final Map<String, dynamic> filters;
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final List<SortOption> sortOptions;
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final PaginationParams paginationParams;
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final bool pullToRefresh;
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/// The builder used when the channel list is empty.
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final WidgetBuilder emptyBuilder;
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/// The builder that will be used in case of error
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final Widget Function(Error error) errorBuilder;
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/// Builder used to create a custom item separator
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final IndexedWidgetBuilder separatorBuilder;
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const MessageSearchListView({
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Key key,
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@required this.messageQuery,
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@required this.filters,
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this.sortOptions,
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this.paginationParams,
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this.emptyBuilder,
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this.errorBuilder,
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this.separatorBuilder,
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this.pullToRefresh = true,
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}) : super(key: key);
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@override
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_MessageSearchListViewState createState() => _MessageSearchListViewState();
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}
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class _MessageSearchListViewState extends State<MessageSearchListView> {
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@override
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void initState() {
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super.initState();
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final messageSearchBloc = MessageSearchBloc.of(context);
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messageSearchBloc.search(
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filter: widget.filters,
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sort: widget.sortOptions,
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query: widget.messageQuery,
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pagination: widget.paginationParams,
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);
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}
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@override
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Widget build(BuildContext context) {
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final messageSearchBloc = MessageSearchBloc.of(context);
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if (!widget.pullToRefresh) {
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return _buildListView(messageSearchBloc);
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}
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return RefreshIndicator(
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onRefresh: () async {
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return messageSearchBloc.search(
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filter: widget.filters,
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sort: widget.sortOptions,
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query: widget.messageQuery,
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pagination: widget.paginationParams,
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);
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},
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child: _buildListView(messageSearchBloc),
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);
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}
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Widget _separatorBuilder(BuildContext context, int index) {
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return Container(
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height: 1,
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color: Theme.of(context).brightness == Brightness.dark
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? Colors.white.withOpacity(0.1)
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: Colors.black.withOpacity(0.1),
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);
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}
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Widget _listItemBuilder(BuildContext context, Message message) {
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return MessageSearchItem(message: message);
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}
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Widget _buildQueryProgressIndicator(
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context, MessageSearchBlocState messageSearchBloc) {
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return StreamBuilder<bool>(
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stream: messageSearchBloc.queryMessagesLoading,
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initialData: false,
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builder: (context, snapshot) {
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if (snapshot.hasError) {
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return Container(
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color: Color(0xffd0021B).withAlpha(26),
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child: Padding(
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padding: const EdgeInsets.symmetric(vertical: 16.0),
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child: Center(
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child: Text('Error loading messages'),
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),
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),
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);
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}
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return Container(
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height: 100,
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padding: EdgeInsets.all(32),
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child: Center(
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child: snapshot.data ? CircularProgressIndicator() : Container(),
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),
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);
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});
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}
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Widget _buildListView(MessageSearchBlocState messageSearchBloc) {
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return StreamBuilder<List<Message>>(
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stream: messageSearchBloc.messagesStream,
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builder: (context, snapshot) {
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if (snapshot.hasError) {
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if (snapshot.error is Error) {
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print((snapshot.error as Error).stackTrace);
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}
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if (widget.errorBuilder != null) {
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return widget.errorBuilder(snapshot.error);
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}
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var message = snapshot.error.toString();
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if (snapshot.error is DioError) {
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final dioError = snapshot.error as DioError;
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if (dioError.type == DioErrorType.RESPONSE) {
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message = dioError.message;
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} else {
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message = 'Check your connection and retry';
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}
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}
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return Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: <Widget>[
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Text.rich(
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TextSpan(
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children: [
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WidgetSpan(
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child: Padding(
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padding: const EdgeInsets.only(
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right: 2.0,
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),
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child: Icon(Icons.error_outline),
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),
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),
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TextSpan(text: 'Error loading messages'),
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],
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),
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style: Theme.of(context).textTheme.headline6,
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),
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Padding(
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padding: const EdgeInsets.only(
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top: 16.0,
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),
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child: Text(message),
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),
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FlatButton(
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onPressed: () {
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messageSearchBloc.search(
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filter: widget.filters,
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sort: widget.sortOptions,
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query: widget.messageQuery,
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pagination: widget.paginationParams,
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);
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},
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child: Text('Retry'),
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),
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],
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),
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);
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}
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if (!snapshot.hasData) {
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return LayoutBuilder(
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builder: (context, viewportConstraints) {
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return SingleChildScrollView(
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physics: AlwaysScrollableScrollPhysics(),
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child: ConstrainedBox(
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constraints: BoxConstraints(
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minHeight: viewportConstraints.maxHeight,
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),
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child: Center(
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child: CircularProgressIndicator(),
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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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final items = snapshot.data;
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if (items.isEmpty && widget.emptyBuilder != null) {
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return widget.emptyBuilder(context);
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}
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if (items.isEmpty && widget.emptyBuilder == null) {
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return LayoutBuilder(
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builder: (context, viewportConstraints) {
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return SingleChildScrollView(
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physics: AlwaysScrollableScrollPhysics(),
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child: ConstrainedBox(
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constraints: BoxConstraints(
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minHeight: viewportConstraints.maxHeight,
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),
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child: Center(
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child: Text('There are no messages currently'),
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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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Widget child;
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child = LazyLoadScrollView(
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onEndOfPage: () => messageSearchBloc.search(
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filter: widget.filters,
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sort: widget.sortOptions,
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pagination: widget.paginationParams.copyWith(
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offset: messageSearchBloc.messages?.length ?? 0,
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),
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query: widget.messageQuery,
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),
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child: ListView.separated(
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physics: AlwaysScrollableScrollPhysics(),
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itemCount: items.isNotEmpty ? items.length + 1 : items.length,
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separatorBuilder: (_, index) {
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if (widget.separatorBuilder != null) {
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return widget.separatorBuilder(context, index);
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}
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return _separatorBuilder(context, index);
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},
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itemBuilder: (context, index) {
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if (index < items.length) {
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return _listItemBuilder(context, items[index]);
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}
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return _buildQueryProgressIndicator(context, messageSearchBloc);
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},
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),
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);
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if (true) {
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child = Column(
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children: [
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Container(
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width: double.maxFinite,
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decoration: BoxDecoration(
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gradient: LinearGradient(
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begin: Alignment.centerLeft,
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end: Alignment.centerRight,
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colors: [
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Colors.black.withOpacity(0.02),
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Colors.white.withOpacity(0.05),
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],
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stops: [0, 1],
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),
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),
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child: Padding(
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padding: const EdgeInsets.symmetric(
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vertical: 8,
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horizontal: 8,
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),
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child: Text(
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'${items.length} results',
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style: TextStyle(
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color: Colors.black.withOpacity(0.5),
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),
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),
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),
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),
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Expanded(child: child),
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],
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);
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}
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return child;
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},
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);
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}
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@override
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void didUpdateWidget(MessageSearchListView oldWidget) {
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super.didUpdateWidget(oldWidget);
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if (widget.filters?.toString() != oldWidget.filters?.toString() ||
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jsonEncode(widget.sortOptions) != jsonEncode(oldWidget.sortOptions) ||
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widget.paginationParams?.toJson()?.toString() !=
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oldWidget.paginationParams?.toJson()?.toString() ||
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widget.messageQuery?.toString() != oldWidget.messageQuery?.toString()) {
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final messageSearchBloc = MessageSearchBloc.of(context);
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messageSearchBloc.search(
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filter: widget.filters,
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sort: widget.sortOptions,
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query: widget.messageQuery,
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pagination: widget.paginationParams,
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);
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}
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}
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}
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