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implemented backward pagination for chat history with on-scroll prefetching

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This commit is contained in:
Elias Müller
2026-07-17 20:14:47 +02:00
parent 101e7c909c
commit f3cd7896d9
7 changed files with 270 additions and 40 deletions
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lib/state/app/modules/chat/bloc/chat_state.freezed.dart
+26 -20
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@@ -15,7 +15,7 @@ T _$identity<T>(T value) => value;
/// @nodoc
mixin _$ChatState {
String get currentToken; GetChatResponse? get chatResponse; int? get referenceMessageId;
String get currentToken; GetChatResponse? get chatResponse; int? get referenceMessageId; bool get hasMoreOld; bool get isLoadingOlder;
/// Create a copy of ChatState
/// with the given fields replaced by the non-null parameter values.
@JsonKey(includeFromJson: false, includeToJson: false)
@@ -28,16 +28,16 @@ $ChatStateCopyWith<ChatState> get copyWith => _$ChatStateCopyWithImpl<ChatState>
@override
bool operator ==(Object other) {
return identical(this, other) || (other.runtimeType == runtimeType&&other is ChatState&&(identical(other.currentToken, currentToken) || other.currentToken == currentToken)&&(identical(other.chatResponse, chatResponse) || other.chatResponse == chatResponse)&&(identical(other.referenceMessageId, referenceMessageId) || other.referenceMessageId == referenceMessageId));
return identical(this, other) || (other.runtimeType == runtimeType&&other is ChatState&&(identical(other.currentToken, currentToken) || other.currentToken == currentToken)&&(identical(other.chatResponse, chatResponse) || other.chatResponse == chatResponse)&&(identical(other.referenceMessageId, referenceMessageId) || other.referenceMessageId == referenceMessageId)&&(identical(other.hasMoreOld, hasMoreOld) || other.hasMoreOld == hasMoreOld)&&(identical(other.isLoadingOlder, isLoadingOlder) || other.isLoadingOlder == isLoadingOlder));
}
@JsonKey(includeFromJson: false, includeToJson: false)
@override
int get hashCode => Object.hash(runtimeType,currentToken,chatResponse,referenceMessageId);
int get hashCode => Object.hash(runtimeType,currentToken,chatResponse,referenceMessageId,hasMoreOld,isLoadingOlder);
@override
String toString() {
return 'ChatState(currentToken: $currentToken, chatResponse: $chatResponse, referenceMessageId: $referenceMessageId)';
return 'ChatState(currentToken: $currentToken, chatResponse: $chatResponse, referenceMessageId: $referenceMessageId, hasMoreOld: $hasMoreOld, isLoadingOlder: $isLoadingOlder)';
}
@@ -48,7 +48,7 @@ abstract mixin class $ChatStateCopyWith<$Res> {
factory $ChatStateCopyWith(ChatState value, $Res Function(ChatState) _then) = _$ChatStateCopyWithImpl;
@useResult
$Res call({
String currentToken, GetChatResponse? chatResponse, int? referenceMessageId
String currentToken, GetChatResponse? chatResponse, int? referenceMessageId, bool hasMoreOld, bool isLoadingOlder
});
@@ -65,12 +65,14 @@ class _$ChatStateCopyWithImpl<$Res>
/// Create a copy of ChatState
/// with the given fields replaced by the non-null parameter values.
@pragma('vm:prefer-inline') @override $Res call({Object? currentToken = null,Object? chatResponse = freezed,Object? referenceMessageId = freezed,}) {
@pragma('vm:prefer-inline') @override $Res call({Object? currentToken = null,Object? chatResponse = freezed,Object? referenceMessageId = freezed,Object? hasMoreOld = null,Object? isLoadingOlder = null,}) {
return _then(_self.copyWith(
currentToken: null == currentToken ? _self.currentToken : currentToken // ignore: cast_nullable_to_non_nullable
as String,chatResponse: freezed == chatResponse ? _self.chatResponse : chatResponse // ignore: cast_nullable_to_non_nullable
as GetChatResponse?,referenceMessageId: freezed == referenceMessageId ? _self.referenceMessageId : referenceMessageId // ignore: cast_nullable_to_non_nullable
as int?,
as int?,hasMoreOld: null == hasMoreOld ? _self.hasMoreOld : hasMoreOld // ignore: cast_nullable_to_non_nullable
as bool,isLoadingOlder: null == isLoadingOlder ? _self.isLoadingOlder : isLoadingOlder // ignore: cast_nullable_to_non_nullable
as bool,
));
}
@@ -155,10 +157,10 @@ return $default(_that);case _:
/// }
/// ```
@optionalTypeArgs TResult maybeWhen<TResult extends Object?>(TResult Function( String currentToken, GetChatResponse? chatResponse, int? referenceMessageId)? $default,{required TResult orElse(),}) {final _that = this;
@optionalTypeArgs TResult maybeWhen<TResult extends Object?>(TResult Function( String currentToken, GetChatResponse? chatResponse, int? referenceMessageId, bool hasMoreOld, bool isLoadingOlder)? $default,{required TResult orElse(),}) {final _that = this;
switch (_that) {
case _ChatState() when $default != null:
return $default(_that.currentToken,_that.chatResponse,_that.referenceMessageId);case _:
return $default(_that.currentToken,_that.chatResponse,_that.referenceMessageId,_that.hasMoreOld,_that.isLoadingOlder);case _:
return orElse();
}
@@ -176,10 +178,10 @@ return $default(_that.currentToken,_that.chatResponse,_that.referenceMessageId);
/// }
/// ```
@optionalTypeArgs TResult when<TResult extends Object?>(TResult Function( String currentToken, GetChatResponse? chatResponse, int? referenceMessageId) $default,) {final _that = this;
@optionalTypeArgs TResult when<TResult extends Object?>(TResult Function( String currentToken, GetChatResponse? chatResponse, int? referenceMessageId, bool hasMoreOld, bool isLoadingOlder) $default,) {final _that = this;
switch (_that) {
case _ChatState():
return $default(_that.currentToken,_that.chatResponse,_that.referenceMessageId);case _:
return $default(_that.currentToken,_that.chatResponse,_that.referenceMessageId,_that.hasMoreOld,_that.isLoadingOlder);case _:
throw StateError('Unexpected subclass');
}
@@ -196,10 +198,10 @@ return $default(_that.currentToken,_that.chatResponse,_that.referenceMessageId);
/// }
/// ```
@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? Function( String currentToken, GetChatResponse? chatResponse, int? referenceMessageId)? $default,) {final _that = this;
@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? Function( String currentToken, GetChatResponse? chatResponse, int? referenceMessageId, bool hasMoreOld, bool isLoadingOlder)? $default,) {final _that = this;
switch (_that) {
case _ChatState() when $default != null:
return $default(_that.currentToken,_that.chatResponse,_that.referenceMessageId);case _:
return $default(_that.currentToken,_that.chatResponse,_that.referenceMessageId,_that.hasMoreOld,_that.isLoadingOlder);case _:
return null;
}
@@ -211,12 +213,14 @@ return $default(_that.currentToken,_that.chatResponse,_that.referenceMessageId);
@JsonSerializable()
class _ChatState implements ChatState {
const _ChatState({this.currentToken = '', this.chatResponse, this.referenceMessageId});
const _ChatState({this.currentToken = '', this.chatResponse, this.referenceMessageId, this.hasMoreOld = true, this.isLoadingOlder = false});
factory _ChatState.fromJson(Map<String, dynamic> json) => _$ChatStateFromJson(json);
@override@JsonKey() final String currentToken;
@override final GetChatResponse? chatResponse;
@override final int? referenceMessageId;
@override@JsonKey() final bool hasMoreOld;
@override@JsonKey() final bool isLoadingOlder;
/// Create a copy of ChatState
/// with the given fields replaced by the non-null parameter values.
@@ -231,16 +235,16 @@ Map<String, dynamic> toJson() {
@override
bool operator ==(Object other) {
return identical(this, other) || (other.runtimeType == runtimeType&&other is _ChatState&&(identical(other.currentToken, currentToken) || other.currentToken == currentToken)&&(identical(other.chatResponse, chatResponse) || other.chatResponse == chatResponse)&&(identical(other.referenceMessageId, referenceMessageId) || other.referenceMessageId == referenceMessageId));
return identical(this, other) || (other.runtimeType == runtimeType&&other is _ChatState&&(identical(other.currentToken, currentToken) || other.currentToken == currentToken)&&(identical(other.chatResponse, chatResponse) || other.chatResponse == chatResponse)&&(identical(other.referenceMessageId, referenceMessageId) || other.referenceMessageId == referenceMessageId)&&(identical(other.hasMoreOld, hasMoreOld) || other.hasMoreOld == hasMoreOld)&&(identical(other.isLoadingOlder, isLoadingOlder) || other.isLoadingOlder == isLoadingOlder));
}
@JsonKey(includeFromJson: false, includeToJson: false)
@override
int get hashCode => Object.hash(runtimeType,currentToken,chatResponse,referenceMessageId);
int get hashCode => Object.hash(runtimeType,currentToken,chatResponse,referenceMessageId,hasMoreOld,isLoadingOlder);
@override
String toString() {
return 'ChatState(currentToken: $currentToken, chatResponse: $chatResponse, referenceMessageId: $referenceMessageId)';
return 'ChatState(currentToken: $currentToken, chatResponse: $chatResponse, referenceMessageId: $referenceMessageId, hasMoreOld: $hasMoreOld, isLoadingOlder: $isLoadingOlder)';
}
@@ -251,7 +255,7 @@ abstract mixin class _$ChatStateCopyWith<$Res> implements $ChatStateCopyWith<$Re
factory _$ChatStateCopyWith(_ChatState value, $Res Function(_ChatState) _then) = __$ChatStateCopyWithImpl;
@override @useResult
$Res call({
String currentToken, GetChatResponse? chatResponse, int? referenceMessageId
String currentToken, GetChatResponse? chatResponse, int? referenceMessageId, bool hasMoreOld, bool isLoadingOlder
});
@@ -268,12 +272,14 @@ class __$ChatStateCopyWithImpl<$Res>
/// Create a copy of ChatState
/// with the given fields replaced by the non-null parameter values.
@override @pragma('vm:prefer-inline') $Res call({Object? currentToken = null,Object? chatResponse = freezed,Object? referenceMessageId = freezed,}) {
@override @pragma('vm:prefer-inline') $Res call({Object? currentToken = null,Object? chatResponse = freezed,Object? referenceMessageId = freezed,Object? hasMoreOld = null,Object? isLoadingOlder = null,}) {
return _then(_ChatState(
currentToken: null == currentToken ? _self.currentToken : currentToken // ignore: cast_nullable_to_non_nullable
as String,chatResponse: freezed == chatResponse ? _self.chatResponse : chatResponse // ignore: cast_nullable_to_non_nullable
as GetChatResponse?,referenceMessageId: freezed == referenceMessageId ? _self.referenceMessageId : referenceMessageId // ignore: cast_nullable_to_non_nullable
as int?,
as int?,hasMoreOld: null == hasMoreOld ? _self.hasMoreOld : hasMoreOld // ignore: cast_nullable_to_non_nullable
as bool,isLoadingOlder: null == isLoadingOlder ? _self.isLoadingOlder : isLoadingOlder // ignore: cast_nullable_to_non_nullable
as bool,
));
}