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reduzierung des codes und optimierung der UserDefinedList.dart

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Nizz05
2023-05-08 19:30:36 +02:00
parent 2b217f8f6a
commit 3786df22cc
5 changed files with 39 additions and 227 deletions
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lib/UserDefinedList.dart
+31 -211
View File
@@ -1,6 +1,7 @@
import 'package:cached_network_image/cached_network_image.dart';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_storage/firebase_storage.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'DetailPage.dart';
import 'package:intl/intl.dart';
@@ -52,7 +53,7 @@ class UserDefinedItem extends StatelessWidget {
child: CircularProgressIndicator(),
),
),
errorWidget: (context, url, error) => Icon(Icons.error),
errorWidget: (context, url, error) => const Icon(Icons.error),
),
),
Flexible(
@@ -103,20 +104,16 @@ class UserDefinedItem extends StatelessWidget {
}
}
// ...
// Ändern Sie die Verwendung von Image.network in UserDefinedItem-Widgets in Ihren ListView.builder-Aufrufen:
class NewsList extends StatefulWidget {
const NewsList({Key? key}) : super(key: key);
class GenericList extends StatefulWidget {
final String collectionName;
const GenericList({Key? key, required this.collectionName}) : super(key: key);
@override
_NewsListState createState() => _NewsListState();
_GenericListState createState() => _GenericListState();
}
class _NewsListState extends State<NewsList> {
class _GenericListState extends State<GenericList> {
final FirebaseFirestore firestore = FirebaseFirestore.instance;
late Stream<QuerySnapshot> newsStream;
@override
void initState() {
@@ -127,32 +124,35 @@ class _NewsListState extends State<NewsList> {
// Enable network
firestore.settings =
Settings(cacheSizeBytes: Settings.CACHE_SIZE_UNLIMITED);
const Settings(cacheSizeBytes: Settings.CACHE_SIZE_UNLIMITED);
}
// Configure the stream to use the cache first and then the server
newsStream = firestore
.collection('News')
Stream<QuerySnapshot> getDocumentStream() {
return firestore
.collection(widget.collectionName)
.orderBy('createdDate', descending: true)
.snapshots(includeMetadataChanges: true);
}
Future<void> _deleteNews(String newsId, String? imageUrl) async {
Future<void> _deleteDocument(String documentId, String? imageUrl) async {
try {
if (imageUrl != null) {
// Löschen Sie das Bild vom Firebase Storage
await FirebaseStorage.instance.refFromURL(imageUrl).delete();
}
// Löschen Sie das Dokument von der Firestore-Kollektion
await firestore.collection('News').doc(newsId).delete();
await firestore.collection(widget.collectionName).doc(documentId).delete();
} catch (e) {
print('Error deleting news: $e');
if (kDebugMode) {
print('Error deleting document: $e');
}
}
}
@override
Widget build(BuildContext context) {
return StreamBuilder<QuerySnapshot>(
stream: newsStream,
stream: getDocumentStream(),
builder: (BuildContext context, AsyncSnapshot<QuerySnapshot> snapshot) {
if (snapshot.hasError) {
return Text('Error: ${snapshot.error}');
@@ -166,207 +166,27 @@ class _NewsListState extends State<NewsList> {
itemCount: documents.length,
itemBuilder: (BuildContext context, int index) {
final Map<String, dynamic> data =
documents[index].data()! as Map<String, dynamic>;
final String newsId = documents[index].id;
final DateTime createdDate = data['createdDate'].toDate();
final formattedDate =
DateFormat('dd.MM.yyyy').format(createdDate);
return Dismissible(
key: UniqueKey(),
direction: DismissDirection.endToStart,
onDismissed: (direction) {
_deleteNews(newsId, data['imageUrl']);
},
background: Container(
color: Colors.red,
child: const Align(
alignment: Alignment.centerRight,
child: Padding(
padding: EdgeInsets.only(right: 16),
child: Icon(Icons.delete, color: Colors.white),
),
),
),
child: UserDefinedItem(
title: data['title'] ?? '',
datum: formattedDate,
description: data['description'] ?? '',
imageUrl: data['imageUrl'] ?? '',
),
);
},
);
}
},
);
}
}
class IssueList extends StatefulWidget {
const IssueList({Key? key}) : super(key: key);
@override
_IssueListState createState() => _IssueListState();
}
class _IssueListState extends State<IssueList> {
final FirebaseFirestore firestore = FirebaseFirestore.instance;
late Stream<QuerySnapshot> issueStream;
@override
void initState() {
super.initState();
// Enable persistence
firestore.enablePersistence();
// Enable network
firestore.settings =
Settings(cacheSizeBytes: Settings.CACHE_SIZE_UNLIMITED);
// Configure the stream to use the cache first and then the server
issueStream = firestore
.collection('Issues')
.orderBy('createdDate', descending: true)
.snapshots(includeMetadataChanges: true);
}
Future<void> _deleteIssue(String issueId, String imageUrl) async {
try {
final Reference ref = FirebaseStorage.instance.refFromURL(imageUrl);
await ref.delete();
await firestore.collection('Issues').doc(issueId).delete();
} catch (e) {
print('Error deleting issue: $e');
}
}
@override
Widget build(BuildContext context) {
return StreamBuilder<QuerySnapshot>(
stream: issueStream,
builder: (BuildContext context, AsyncSnapshot<QuerySnapshot> snapshot) {
if (snapshot.hasError) {
return Text('Error: ${snapshot.error}');
}
switch (snapshot.connectionState) {
case ConnectionState.waiting:
return const Text('Loading...');
default:
final List<QueryDocumentSnapshot> documents = snapshot.data!.docs;
return ListView.builder(
itemCount: documents.length,
itemBuilder: (BuildContext context, int index) {
final Map<String, dynamic> data =
documents[index].data()! as Map<String, dynamic>;
final String issueId = documents[index].id;
final DateTime createdDate = data['createdDate'].toDate();
final formattedDate =
DateFormat('dd.MM.yyyy').format(createdDate);
return Dismissible(
key: UniqueKey(),
direction: DismissDirection.endToStart,
onDismissed: (direction) {
_deleteIssue(issueId, data['imageUrl']);
},
background: Container(
color: Colors.red,
child: const Align(
alignment: Alignment.centerRight,
child: Padding(
padding: EdgeInsets.only(right: 16),
child: Icon(Icons.delete, color: Colors.white),
),
),
),
child: UserDefinedItem(
title: data['title'] ?? '',
datum: formattedDate,
description: data['description'] ?? '',
imageUrl: data['imageUrl'] ?? '',
),
);
},
);
}
},
);
}
}
class CitizensForum extends StatefulWidget {
const CitizensForum({Key? key}) : super(key: key);
@override
_CitizensForumState createState() => _CitizensForumState();
}
class _CitizensForumState extends State<CitizensForum> {
final FirebaseFirestore firestore = FirebaseFirestore.instance;
late Stream<QuerySnapshot<Map<String, dynamic>>> citizenStream;
@override
void initState() {
super.initState();
// Enable persistence
firestore.enablePersistence();
// Enable network
firestore.settings =
Settings(cacheSizeBytes: Settings.CACHE_SIZE_UNLIMITED);
// Configure the stream to use the cache first and then the server
citizenStream = firestore
.collection('CitizensForum')
.orderBy('createdDate', descending: true)
.snapshots(includeMetadataChanges: true);
}
Future<void> deleteDocument(String documentId, String? imageUrl) async {
// Delete document
await firestore.collection('CitizensForum').doc(documentId).delete();
// Delete image file
if (imageUrl != null) {
await FirebaseStorage.instance.refFromURL(imageUrl).delete();
}
}
@override
Widget build(BuildContext context) {
return StreamBuilder<QuerySnapshot<Map<String, dynamic>>>(
stream: citizenStream,
builder: (BuildContext context,
AsyncSnapshot<QuerySnapshot<Map<String, dynamic>>> snapshot) {
if (snapshot.hasError) {
return Text('Error: ${snapshot.error}');
}
switch (snapshot.connectionState) {
case ConnectionState.waiting:
return const Text('Loading...');
default:
final List<QueryDocumentSnapshot<Map<String, dynamic>>> documents =
snapshot.data!.docs;
return ListView.builder(
itemCount: documents.length,
itemBuilder: (BuildContext context, int index) {
final Map<String, dynamic> data = documents[index].data();
documents[index].data()! as Map<String, dynamic>;
final String documentId = documents[index].id;
final DateTime createdDate = data['createdDate'].toDate();
final formattedDate =
DateFormat('dd.MM.yyyy').format(createdDate);
DateFormat('dd.MM.yyyy').format(createdDate);
return Dismissible(
key: Key(documentId),
key: UniqueKey(),
direction: DismissDirection.endToStart,
onDismissed: (direction) {
_deleteDocument(documentId, data['imageUrl']);
},
background: Container(
alignment: Alignment.centerRight,
padding: const EdgeInsets.only(right: 16.0),
color: Colors.red,
child: const Icon(Icons.delete, color: Colors.white),
child: const Align(
alignment: Alignment.centerRight,
child: Padding(
padding: EdgeInsets.only(right: 16),
child: Icon(Icons.delete, color: Colors.white),
),
),
),
onDismissed: (_) =>
deleteDocument(documentId, data['imageUrl']),
child: UserDefinedItem(
title: data['title'] ?? '',
datum: formattedDate,