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add pagination

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This commit is contained in:
Valentin CZERYBA 2025-03-24 22:47:49 +01:00
parent 52580c6568
commit 510e366216
2 changed files with 118 additions and 6 deletions
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62
covas_mobile/lib/pages/ListItemByOrganizers.dart
View File

@ -42,17 +42,62 @@ class ListItemOrganizers extends StatefulWidget {
// homepage state
class _MyHomePageState extends State<ListItemOrganizers> {
int _fetchCount = 0;
bool _isLoading = false;
late ScrollController _scrollController;
final AuthService _authService = AuthService();
void _incrementFetchCount() {
setState(() {
_fetchCount++;
});
}
void _decrementFetchCount() {
setState(() {
if (_fetchCount > 0) {
_fetchCount--;
}
});
}
void _scrollListener() {
if (_scrollController.position.pixels ==
_scrollController.position.maxScrollExtent) {
_incrementFetchCount();
} else if (_scrollController.position.pixels ==
_scrollController.position.minScrollExtent) {
_decrementFetchCount();
}
_fetchData();
}
Future<void> _fetchData() async {
print("Counter : ${_fetchCount}");
if (_isLoading) return;
setState(() {
_isLoading = true;
});
await Future.delayed(Duration(seconds: 2));
getPosts(widget.organizer, count: _fetchCount);
setState(() {
_isLoading = false;
});
}
// variable to call and store future list of posts
// function to fetch data from api and return future list of posts
static Future<List<Events>> getPosts(organizer) async {
static Future<List<Events>> getPosts(organizer, {count = 0}) async {
SharedPreferences prefs = await SharedPreferences.getInstance();
var accessToken = prefs.getString("access_token") ?? "";
final List<Events> body = [];
if (accessToken.isNotEmpty) {
var url = Uri.parse("${globals.api}/events?organizers=${organizer}");
var url = Uri.parse(
"${globals.api}/events?organizers=${organizer}&skip=${count}");
final response = await http.get(url, headers: {
"Content-Type": "application/json",
HttpHeaders.cookieHeader: "access_token=${accessToken}"
@ -67,6 +112,14 @@ class _MyHomePageState extends State<ListItemOrganizers> {
void initState() {
super.initState();
_authService.checkTokenStatus(context);
_scrollController = ScrollController();
_scrollController.addListener(_scrollListener);
}
@override
void dispose() {
_scrollController.dispose();
super.dispose();
}
// build function
@ -109,7 +162,10 @@ class _MyHomePageState extends State<ListItemOrganizers> {
foregroundColor: Colors.white,
),
body: ListView.separated(
itemCount: posts.length,
controller: _scrollController,
itemCount: posts.isNotEmpty
? posts.length + (_isLoading ? 1 : 0) // Add 1 only if loading
: 0,
itemBuilder: (context, index) {
final post = posts[index];
final startDate = DateTime.parse(post.startDate!);

62
covas_mobile/lib/pages/ListItemByTags.dart
View File

@ -44,15 +44,59 @@ class ListItemTags extends StatefulWidget {
class _MyHomePageState extends State<ListItemTags> {
// variable to call and store future list of posts
int _fetchCount = 0;
bool _isLoading = false;
late ScrollController _scrollController;
final AuthService _authService = AuthService();
void _incrementFetchCount() {
setState(() {
_fetchCount++;
});
}
void _decrementFetchCount() {
setState(() {
if (_fetchCount > 0) {
_fetchCount--;
}
});
}
void _scrollListener() {
if (_scrollController.position.pixels ==
_scrollController.position.maxScrollExtent) {
_incrementFetchCount();
} else if (_scrollController.position.pixels ==
_scrollController.position.minScrollExtent) {
_decrementFetchCount();
}
_fetchData();
}
Future<void> _fetchData() async {
print("Counter : ${_fetchCount}");
if (_isLoading) return;
setState(() {
_isLoading = true;
});
await Future.delayed(Duration(seconds: 2));
getPosts(widget.tags, count: _fetchCount);
setState(() {
_isLoading = false;
});
}
// function to fetch data from api and return future list of posts
static Future<List<Events>> getPosts(tags) async {
static Future<List<Events>> getPosts(tags, {count = 0}) async {
SharedPreferences prefs = await SharedPreferences.getInstance();
var accessToken = prefs.getString("access_token") ?? "";
final List<Events> body = [];
if (accessToken.isNotEmpty) {
var url = Uri.parse("${globals.api}/events?tags=${tags}");
var url = Uri.parse("${globals.api}/events?tags=${tags}&skip=${count}");
final response = await http.get(url, headers: {
"Content-Type": "application/json",
HttpHeaders.cookieHeader: "access_token=${accessToken}"
@ -67,6 +111,15 @@ class _MyHomePageState extends State<ListItemTags> {
void initState() {
super.initState();
_authService.checkTokenStatus(context);
_authService.checkTokenStatus(context);
_scrollController = ScrollController();
_scrollController.addListener(_scrollListener);
}
@override
void dispose() {
_scrollController.dispose();
super.dispose();
}
// build function
@ -108,7 +161,10 @@ class _MyHomePageState extends State<ListItemTags> {
foregroundColor: Colors.white,
),
body: ListView.separated(
itemCount: posts.length,
controller: _scrollController,
itemCount: posts.isNotEmpty
? posts.length + (_isLoading ? 1 : 0) // Add 1 only if loading
: 0,
itemBuilder: (context, index) {
final post = posts[index];
final startDate = DateTime.parse(post.startDate!);