add author selection menu

frontend/lib/main.dart

@@ -2,7 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 import 'package:provider/provider.dart';
 
-import 'strings.dart';
+import 'values/strings.dart';
 import 'main_scaffold.dart';
 
 // providers

frontend/lib/main_scaffold.dart

@@ -1,6 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
-import 'strings.dart';
+import 'values/strings.dart';
 
 class MainScaffold extends StatelessWidget {
   final Widget child;

frontend/lib/pages/add.dart

@@ -2,6 +2,8 @@ import 'package:flutter/material.dart';
 import 'package:frontend/provider/quote_provider.dart';
 import 'package:frontend/model/quote.dart';
 
+import 'package:provider/provider.dart';
+
 import 'package:frontend/values/strings.dart';
 import 'package:frontend/values/constants.dart';
 
@@ -12,7 +14,7 @@ class AddPage extends StatelessWidget {
   Widget build(BuildContext context) {
     final bodyController = TextEditingController(text: '');
     final authorController = TextEditingController(text: '');
-    final provider = QuoteProvider();
+    final provider = Provider.of<QuoteProvider>(context);
     return Card(
       margin: const EdgeInsets.all(Constants.edgeInset),
       child: Padding(
@@ -40,11 +42,40 @@ class AddPage extends StatelessWidget {
             ),
 
             const SizedBox(height: 8),
-
             TextField(
               controller: authorController,
-              decoration: const InputDecoration(
+              decoration: InputDecoration(
                 labelText: Strings.author,
+                suffixIcon: IconButton(
+                  icon: Icon(Icons.arrow_drop_down),
+                  onPressed: () {
+                    showModalBottomSheet(
+                      context: context,
+                      builder: (context) {
+                        var authors = provider.authors.toList()..sort();
+
+                        return SizedBox(
+                          height: 300,
+                          child: ListView.builder(
+                            padding: const EdgeInsets.all(Constants.edgeInset),
+                            itemCount: authors.length,
+                            itemBuilder: (context, index) {
+                              final author = authors[index];
+
+                              return ListTile(
+                                title: Text(author),
+                                onTap: () {
+                                  authorController.text = author;
+                                  Navigator.pop(context);
+                                },
+                              );
+                            },
+                          ),
+                        );
+                      },
+                    );
+                  },
+                ),
               ),
             ),
 

frontend/lib/pages/list.dart

@@ -2,9 +2,11 @@ import 'package:flutter/material.dart';
 
 import 'package:frontend/provider/quote_provider.dart';
 import 'package:frontend/model/quote.dart';
-import 'package:frontend/strings.dart';
+import 'package:frontend/values/strings.dart';
 import 'package:provider/provider.dart';
 
+import 'package:frontend/values/constants.dart';
+
 class ListPage extends StatelessWidget {
   const ListPage({super.key});
 
@@ -30,12 +32,18 @@ class ListPage extends StatelessWidget {
 
     return
       ListView.builder(
+        padding: EdgeInsets.all(Constants.edgeInset),
         itemCount: provider.quotes.length,
         itemBuilder: (context, index) {
           final quote = provider.quotes[index];
       
           return
               ListTile(
+                contentPadding: EdgeInsets.only(
+                  bottom: Constants.edgeInset,
+                  left: Constants.edgeInset,
+                  right: Constants.edgeInset,
+                ),
                 title: Text(quote.body),
                 subtitle: Text("– ${quote.author}"),
                 trailing: PopupMenuButton<String>(
@@ -97,6 +105,39 @@ class ListPage extends StatelessWidget {
               ),
               TextField(
                 controller: authorController,
+                decoration: InputDecoration(
+                  label: Text(Strings.author),
+                  suffixIcon: IconButton(
+                    icon: Icon(Icons.arrow_drop_down),
+                    onPressed: () {
+                      showModalBottomSheet(
+                        context: context,
+                        builder: (context) {
+                          var authors = provider.authors.toList()..sort();
+
+                          return SizedBox(
+                            height: 300,
+                            child: ListView.builder(
+                              padding: const EdgeInsets.all(Constants.edgeInset),
+                              itemCount: authors.length,
+                              itemBuilder: (context, index) {
+                                final author = authors[index];
+
+                                return ListTile(
+                                  title: Text(author),
+                                  onTap: () {
+                                    authorController.text = author;
+                                    Navigator.pop(context);
+                                  },
+                                );
+                              },
+                            ),
+                          );
+                        },
+                      );
+                    },
+                  ),
+                ),
               ),
             ],
           ),

frontend/lib/provider/quote_provider.dart

@@ -7,10 +7,12 @@ import 'package:frontend/repository/quote_repository.dart';
 
 class QuoteProvider extends ChangeNotifier {
   List<Quote> _quotes = [];
+  Set<String> _authors = {};
   bool _loading = false;
   String? _error;
 
   List<Quote> get quotes => _quotes;
+  Set<String> get authors => _authors;
   bool get loading => _loading;
   String? get error => _error;
 
@@ -20,6 +22,13 @@ class QuoteProvider extends ChangeNotifier {
     readQuotes(); // auto-load on creation
   }
 
+  void populateAuthors() {
+    _authors = {};
+    for (var i = 0; i < quotes.length; i++) {
+      _authors.add(quotes[i].author);
+    }
+  }
+
   Future<void> readQuotes() async {
     _loading = true;
     _error = null;
@@ -31,6 +40,8 @@ class QuoteProvider extends ChangeNotifier {
       _error = e.toString();
     }
 
+    populateAuthors();
+
     _loading = false;
     notifyListeners();
   }
@@ -38,6 +49,7 @@ class QuoteProvider extends ChangeNotifier {
   Future<void> createQuote(Quote quote) async {
     final newQuote = await repo.createQuote(quote);
     _quotes.add(newQuote);
+    populateAuthors();
     notifyListeners();
   }
 
@@ -50,11 +62,20 @@ class QuoteProvider extends ChangeNotifier {
 
       final index = _quotes.indexWhere((q) => q.id == quote.id);
       if (index != -1) {
+        final oldAuthor = _quotes[index].author;
         final newList = List<Quote>.from(_quotes);
         newList[index] = updated;
         _quotes = newList;
+        Map<String, int> authorMap = {};
+        for (final q in quotes) {
+          authorMap[q.author] = (authorMap[q.author] ?? 0) + 1;
+        }
+        if (authorMap[oldAuthor] == 1) {
+          _authors.remove(oldAuthor);
+        }
+        _authors.add(updated.author);
       }
-    } finally {
+    } finally {      
       _loading = false;
       notifyListeners();
     }
@@ -64,6 +85,7 @@ class QuoteProvider extends ChangeNotifier {
     await repo.deleteQuote(quote);
 
     _quotes.removeWhere((q) => q.id == quote.id);
+    populateAuthors();
     notifyListeners();
   }
 }