Initial commit

lib/providers/todoprovider.dart

@@ -0,0 +1,141 @@
+import 'dart:io';
+
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import 'package:todoapp/elems/filehandler.dart';
+import 'package:todoapp/elems/todo.dart';
+import 'package:todoapp/elems/todolist.dart';
+import 'package:todoapp/modules/todolistwidget.dart';
+import 'package:todoapp/modules/todowidget.dart';
+
+class TodoProvider extends ChangeNotifier {
+  TodoProvider() {}
+  
+  Future<void> readListsFromDisk() async {
+    Map js = await FileHandler.fileContent;
+    
+    for (String key in js.keys) {
+      todoLists[key] = TodoList(title: key, widget: buildTodoListWidget(key), todos: []);
+
+      for (String key2 in js[key].keys) {
+        todoLists[key]!.todos.add(Todo(title: key2, widget: buildTodoWidget(key2, js[key][key2]), checked: js[key][key2]));
+      }
+    }
+
+    todos = todoLists[selectedList]!.todos;
+
+    notifyListeners();
+  }
+
+  Map<String, TodoList> todoLists = {};
+  List<Todo> todos = [];
+  String selectedList = "Personal";
+
+  void renameList(String oldTitle, String newTitle) async {
+    TodoList tempList = todoLists[oldTitle]!;
+    tempList.title = newTitle;
+    tempList.widget = buildTodoListWidget(newTitle);
+    todoLists.remove(oldTitle);
+    todoLists[newTitle] = tempList;
+    selectedList = newTitle;
+    todos = todoLists[newTitle]!.todos;
+
+    await FileHandler.renameList(oldTitle, newTitle);
+
+    notifyListeners();
+  }
+
+  void removeList(String title) async {
+    todoLists.remove(title);
+    selectedList = "Personal";
+    todos = todoLists["Personal"]!.todos;
+
+    await FileHandler.removeList(title);
+
+    notifyListeners();
+  }
+
+  void addList(String title) async {
+    TodoList list =
+        TodoList(title: title, widget: buildTodoListWidget(title), todos: []);
+    todoLists[title] = list;
+
+    await FileHandler.addList(title);
+
+    notifyListeners();
+  }
+
+  void changeList(String title) {
+    if (!todoLists.containsKey(title)) {
+      return;
+    }
+
+    selectedList = title;
+    todos = todoLists[title]!.todos;
+    notifyListeners();
+  }
+
+  Future<void> writeTodoChanges() async {
+    Map js = {};
+
+    for (Todo t in todos) {
+      js[t.title] = t.checked;
+    }
+
+    print(js);
+
+    await FileHandler.saveList(js, selectedList);
+  }
+
+  void addTodo(String title) async {
+    todos.add(Todo(
+        title: title, checked: false, widget: buildTodoWidget(title, false)));
+
+    await writeTodoChanges();
+    notifyListeners();
+  }
+
+  void removeTodo(String title) async {
+    Todo todo = todoByTitle(title);
+    todos.remove(todo);
+
+    await writeTodoChanges();
+    notifyListeners();
+  }
+
+  void updateTodo(String oldTitle, String newTitle) async {
+    Todo todo = todoByTitle(oldTitle);
+    todo.title = newTitle;
+    todo.widget = buildTodoWidget(newTitle, todo.checked);
+
+    await writeTodoChanges();
+    notifyListeners();
+  }
+
+  void setTodoState(String title, bool checked) async {
+    Todo todo = todoByTitle(title);
+
+    todo.checked = checked;
+    todo.widget = buildTodoWidget(title, checked);
+
+    await writeTodoChanges();
+    notifyListeners();
+  }
+
+  TodoListWidget buildTodoListWidget(String title) {
+    return TodoListWidget(title: title);
+  }
+
+  TodoWidget buildTodoWidget(String title, bool checked) {
+    return TodoWidget(checked: checked, title: title);
+  }
+
+  Todo todoByTitle(String title) {
+    for (Todo t in todos) {
+      if (t.title == title) {
+        return t;
+      }
+    }
+    return Todo(title: "None", widget: const SizedBox(), checked: false);
+  }
+}