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Show cached conversations list before getting list from the server

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This commit is contained in:
Pierre HUBERT
2019-04-24 15:03:36 +02:00
parent eb34ed5c3d
commit 4be5a1b5a8
5 changed files with 79 additions and 16 deletions
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62
lib/ui/screens/conversations_screen.dart
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@@ -33,23 +33,34 @@ class _ConversationScreenState extends State<ConversationsScreen> {
void setLoading(bool loading) => setState(() => _loading = loading);
/// Get the list of conversations, once from the cache, once from the server
Future<void> _loadConversations() async {
await _loadConversationsList(true);
await _loadConversationsList(false);
}
void _gotLoadingError() {
setLoading(false);
setError(_list == null ? LoadErrorLevel.MAJOR : LoadErrorLevel.MINOR);
}
/// Load the list of conversations
Future<void> _loadConversations() async {
Future<void> _loadConversationsList(bool cached) async {
setError(LoadErrorLevel.NONE);
setLoading(true);
//Process the list of conversations
final list = await _conversationsHelper.downloadList();
//Get the list of conversations
var list;
if(cached)
list = await _conversationsHelper.getCachedList();
else
list = await _conversationsHelper.downloadList();
if (list == null) return _gotLoadingError();
//Get information about the members of the conversations
list.users = await _usersHelper.getUsersInfo(list.allUsersID);
if(list.users == null) return _gotLoadingError();
if (list.users == null) return _gotLoadingError();
//Save list
setState(() {
@@ -65,7 +76,7 @@ class _ConversationScreenState extends State<ConversationsScreen> {
tr("Could not retrieve the list of conversations!"),
actions: <Widget>[
FlatButton(
onPressed: _loadConversations,
onPressed: () => _loadConversationsList(true),
child: Text(
tr("Retry").toUpperCase(),
style: TextStyle(
@@ -83,14 +94,39 @@ class _ConversationScreenState extends State<ConversationsScreen> {
if (_list == null) return buildCenteredProgressBar();
// Show the list of conversations
return ListView.builder(
itemBuilder: (context, index) {
return ConversationTile(
conversation: _list.elementAt(index),
usersList: _list.users,
);
},
itemCount: _list.length,
return Stack(
children: <Widget>[
Column(
children: <Widget>[
Container(
child: _error == LoadErrorLevel.MINOR ? _buildErrorCard() : null,
),
Expanded(
child: ListView.builder(
itemBuilder: (context, index) {
return ConversationTile(
conversation: _list.elementAt(index),
usersList: _list.users,
);
},
itemCount: _list.length,
),
),
],
),
Positioned(
top: 8.0,
left: 0.0,
right: 0.0,
child: Container(
child: !_loading
? null
: Center(
child: CircularProgressIndicator(),
),
),
)
],
);
}
}