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ParseLiveList: option to turn off lazy loading #407

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Merged
merged 1 commit into from
Aug 5, 2020
Merged

ParseLiveList: option to turn off lazy loading #407

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49 changes: 33 additions & 16 deletions lib/src/utils/parse_live_list.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -6,19 +6,23 @@ import '../../parse_server_sdk.dart';

// ignore_for_file: invalid_use_of_protected_member
class ParseLiveList<T extends ParseObject> {
ParseLiveList._(this._query, this._listeningIncludes);
ParseLiveList._(this._query, this._listeningIncludes, this._lazyLoading) {
_debug = isDebugEnabled();
}

static Future<ParseLiveList<T>> create<T extends ParseObject>(
QueryBuilder<T> _query,
{bool listenOnAllSubItems,
List<String> listeningIncludes}) {
List<String> listeningIncludes,
bool lazyLoading = true}) {
final ParseLiveList<T> parseLiveList = ParseLiveList<T>._(
_query,
listenOnAllSubItems == true
? _toIncludeMap(
_query.limiters['include']?.toString()?.split(',') ??
<String>[])
: _toIncludeMap(listeningIncludes ?? <String>[]));
: _toIncludeMap(listeningIncludes ?? <String>[]),
lazyLoading);

return parseLiveList._init().then((_) {
return parseLiveList;
Expand All @@ -28,6 +32,7 @@ class ParseLiveList<T extends ParseObject> {
List<ParseLiveListElement<T>> _list = List<ParseLiveListElement<T>>();
StreamController<ParseLiveListEvent<T>> _eventStreamController;
int _nextID = 0;
bool _debug;

/// is object1 listed after object2?
/// can return null
Expand Down Expand Up @@ -89,6 +94,8 @@ class ParseLiveList<T extends ParseObject> {
//The included Items, where LiveList should look for updates.
final Map<String, dynamic> _listeningIncludes;

final bool _lazyLoading;

int get size {
return _list.length;
}
Expand Down Expand Up @@ -122,18 +129,21 @@ class ParseLiveList<T extends ParseObject> {

Future<ParseResponse> _runQuery() async {
final QueryBuilder<T> query = QueryBuilder<T>.copy(_query);
if (query.limiters.containsKey('order')) {
query.keysToReturn(
query.limiters['order'].toString().split(',').map((String string) {
if (string.startsWith('-')) {
return string.substring(1);
}
return string;
}).toList());
} else {
query.keysToReturn(List<String>());
if (_debug)
print('ParseLiveList: lazyLoading is ${_lazyLoading ? 'on' : 'off'}');
if (_lazyLoading) {
if (query.limiters.containsKey('order')) {
query.keysToReturn(
query.limiters['order'].toString().split(',').map((String string) {
if (string.startsWith('-')) {
return string.substring(1);
}
return string;
}).toList());
} else {
query.keysToReturn(List<String>());
}
}

return await query.query<T>();
}

Expand All @@ -145,7 +155,8 @@ class ParseLiveList<T extends ParseObject> {
_list = parseResponse.results
?.map<ParseLiveListElement<T>>((dynamic element) =>
ParseLiveListElement<T>(element,
updatedSubItems: _listeningIncludes))
updatedSubItems: _listeningIncludes,
loaded: !_lazyLoading))
?.toList() ??
List<ParseLiveListElement<T>>();
}
Expand Down Expand Up @@ -748,6 +759,7 @@ class ParseLiveListWidget<T extends ParseObject> extends StatefulWidget {
this.removedItemBuilder,
this.listenOnAllSubItems,
this.listeningIncludes,
this.lazyLoading = true,
}) : super(key: key);

final QueryBuilder<T> query;
Expand All @@ -768,12 +780,15 @@ class ParseLiveListWidget<T extends ParseObject> extends StatefulWidget {
final bool listenOnAllSubItems;
final List<String> listeningIncludes;

final bool lazyLoading;

@override
_ParseLiveListWidgetState<T> createState() => _ParseLiveListWidgetState<T>(
query: query,
removedItemBuilder: removedItemBuilder,
listenOnAllSubItems: listenOnAllSubItems,
listeningIncludes: listeningIncludes,
lazyLoading: lazyLoading,
);

static Widget defaultChildBuilder<T extends ParseObject>(
Expand Down Expand Up @@ -802,11 +817,13 @@ class _ParseLiveListWidgetState<T extends ParseObject>
{@required this.query,
@required this.removedItemBuilder,
bool listenOnAllSubItems,
List<String> listeningIncludes}) {
List<String> listeningIncludes,
bool lazyLoading = true}) {
ParseLiveList.create(
query,
listenOnAllSubItems: listenOnAllSubItems,
listeningIncludes: listeningIncludes,
lazyLoading: lazyLoading,
).then((ParseLiveList<T> value) {
setState(() {
_liveList = value;
Expand Down