languages

A collection of programs made with different programming languages.
git clone git://evanalba.com/languages
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collection_page.dart (3575B)

      1 import 'package:flutter/material.dart';
      2 import 'package:cloud_firestore/cloud_firestore.dart';
      3 import 'package:firebase_auth/firebase_auth.dart';
      4 import 'package:penny/pages/camera_page.dart';
      5 
      6 class CollectionScreen extends StatefulWidget {
      7   const CollectionScreen({super.key});
      8 
      9   @override
     10   State<CollectionScreen> createState() => _CollectionScreenState();
     11 }
     12 
     13 class _CollectionScreenState extends State<CollectionScreen> {
     14   final FirebaseFirestore _firestore = FirebaseFirestore.instance;
     15   final FirebaseAuth _auth = FirebaseAuth.instance;
     16   List<Map<String, dynamic>> collectedMachines = [];
     17   List<Map<String, dynamic>> displayedMachines = [];
     18   String searchText = '';
     19 
     20   @override
     21   void initState() {
     22     super.initState();
     23     _fetchCollectedMachines();
     24   }
     25 
     26   Future<void> _fetchCollectedMachines() async {
     27     final userEmail = await _getUserEmail();
     28     if (userEmail == null) return;
     29 
     30     final snapshot = await _firestore
     31         .collection('collected')
     32         .where('user_email', isEqualTo: userEmail)
     33         .get();
     34 
     35     collectedMachines = snapshot.docs.map((doc) => doc.data()).toList();
     36     displayedMachines = collectedMachines;
     37     setState(() {});
     38   }
     39 
     40   Future<String?> _getUserEmail() async {
     41     final user = _auth.currentUser;
     42     return user?.email;
     43   }
     44 
     45   void _onSearchTextChanged(String text) {
     46     setState(() {
     47       searchText = text;
     48       displayedMachines = collectedMachines
     49           .where((machine) =>
     50               machine['machine_id']
     51                   .toString()
     52                   .toLowerCase()
     53                   .contains(text.toLowerCase()) ||
     54               (machine['name']?.toString().toLowerCase() ?? '')
     55                   .contains(text.toLowerCase()))
     56           .toList();
     57     });
     58   }
     59 
     60   @override
     61   Widget build(BuildContext context) {
     62     return Scaffold(
     63       body: SafeArea(
     64         child: Column(
     65           children: [
     66             Padding(
     67               padding: const EdgeInsets.all(8.0),
     68               child: TextField(
     69                 decoration: const InputDecoration(
     70                   hintText: 'Search Machines...',
     71                   enabledBorder: UnderlineInputBorder(
     72                     borderSide: BorderSide(color: Colors.black),
     73                   ),
     74                   focusedBorder: UnderlineInputBorder(
     75                     borderSide: BorderSide(color: Colors.black),
     76                   ),
     77                   border: UnderlineInputBorder(
     78                     borderSide: BorderSide(color: Colors.black),
     79                   ),
     80                 ),
     81                 onChanged: _onSearchTextChanged,
     82               ),
     83             ),
     84             Expanded(
     85               child: displayedMachines.isEmpty
     86                   ? const Center(child: Text('No collected machines yet'))
     87                   : ListView.builder(
     88                       itemCount: displayedMachines.length,
     89                       itemBuilder: (context, index) {
     90                         final machine = displayedMachines[index];
     91                         return ListTile(
     92                           title:
     93                               Text(machine['machine_id'] ?? 'Unknown machine'),
     94                           onTap: () => Navigator.push(
     95                             context,
     96                             MaterialPageRoute(
     97                               builder: (context) =>
     98                                   CameraScreen(machine: machine),
     99                             ),
    100                           ),
    101                         );
    102                       },
    103                     ),
    104             ),
    105           ],
    106         ),
    107       ),
    108     );
    109   }
    110 }