Добавил скроллбар в представление айтемов

Feat 8.frontend development

backend/backend/admin.py

@@ -1,6 +1,6 @@
 from django.contrib import admin
 
-from .models import ToDoList
+from .models import ToDoList, ToDoItem
 
 
 class ToDoListAdmin(admin.ModelAdmin):
@@ -9,4 +9,11 @@ class ToDoListAdmin(admin.ModelAdmin):
     list_editable = ["title"]
 
 
+class ToDoItemAdmin(admin.ModelAdmin):
+    model = ToDoItem
+    list_display = ["parent", "finished", "text", "created_at"]
+    list_editable = ["finished", "text"]
+
+
 admin.site.register(ToDoList, ToDoListAdmin)
+admin.site.register(ToDoItem, ToDoItemAdmin)

backend/backend/api.py

@@ -1,20 +1,62 @@
 from rest_framework import viewsets, serializers, permissions
 from rest_framework import routers
+from django_filters.rest_framework import DjangoFilterBackend
 
-from .models import ToDoList
+from .models import ToDoList, ToDoItem
+
+
+class ToDoListField(serializers.PrimaryKeyRelatedField):
+    def get_queryset(self):
+        user = self.context["request"].user
+        return ToDoList.objects.filter(user=user)
+
+
+class ToDoItemSerializer(serializers.HyperlinkedModelSerializer):
+    parent = ToDoListField(many=False, read_only=False, help_text="ID родительского списка")
+
+    class Meta:
+        model = ToDoItem
+        fields = ["id", "text", "finished", "created_at", "parent"]
+
+
+class ToDoItemViewSet(viewsets.ModelViewSet):
+    serializer_class = ToDoItemSerializer
+    permission_classes = [permissions.IsAuthenticated]
+    filter_backends = [DjangoFilterBackend]
+    filterset_fields = ["parent", "finished"]
+
+    def get_queryset(self):
+        user = self.request.user
+        if not user.is_authenticated:
+            # ветка только для генерации схемы
+            return ToDoItem.objects.all()
+        return ToDoItem.objects.filter(parent__user=user)
 
 
 class ToDoListSerializer(serializers.HyperlinkedModelSerializer):
     class Meta:
         model = ToDoList
-        fields = ["title", "created_at"]
+        fields = ["id", "title", "created_at"]
+
+    def create(self, validated_data):
+        todo_list = ToDoList.objects.create(
+            user=self.context["request"].user, title=validated_data["title"]
+        )
+        return todo_list
 
 
 class ToDoListViewSet(viewsets.ModelViewSet):
-    queryset = ToDoList.objects.all()
     serializer_class = ToDoListSerializer
     permission_classes = [permissions.IsAuthenticated]
 
+    def get_queryset(self):
+        user = self.request.user
+        if not user.is_authenticated:
+            # ветка только для генерации схемы
+            return ToDoList.objects.all()
+        return ToDoList.objects.filter(user=user)
+
 
 router = routers.DefaultRouter()
-router.register(r"lists", ToDoListViewSet)
+router.register(r"lists", ToDoListViewSet, basename="ToDoLists")
+router.register(r"todo_items", ToDoItemViewSet, basename="ToDoItems")

backend/backend/migrations/0002_todoitem_finished.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.2 on 2021-04-17 11:15
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("backend", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="todoitem",
+            name="finished",
+            field=models.BooleanField(default=False),
+        ),
+    ]

backend/backend/migrations/0003_auto_20210417_1157.py

@@ -0,0 +1,28 @@
+# Generated by Django 3.2 on 2021-04-17 11:57
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("backend", "0002_todoitem_finished"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="todoitem",
+            name="created_at",
+            field=models.DateTimeField(auto_now_add=True, db_index=True),
+        ),
+        migrations.AlterField(
+            model_name="todoitem",
+            name="finished",
+            field=models.BooleanField(db_index=True, default=False),
+        ),
+        migrations.AlterField(
+            model_name="todolist",
+            name="created_at",
+            field=models.DateTimeField(auto_now_add=True, db_index=True),
+        ),
+    ]

backend/backend/models.py

@@ -5,10 +5,11 @@ from django.contrib.auth.models import User
 class ToDoList(models.Model):
     user = models.ForeignKey(User, on_delete=models.CASCADE, null=False, default=None)
     title = models.CharField(max_length=250)
-    created_at = models.DateTimeField(auto_now_add=True)
+    created_at = models.DateTimeField(auto_now_add=True, db_index=True)
 
 
 class ToDoItem(models.Model):
     parent = models.ForeignKey(ToDoList, on_delete=models.CASCADE, null=False, default=None)
     text = models.TextField()
-    created_at = models.DateTimeField(auto_now_add=True)
+    finished = models.BooleanField(default=False, null=False, db_index=True)
+    created_at = models.DateTimeField(auto_now_add=True, db_index=True)

backend/backend/settings.py

@@ -27,7 +27,8 @@ SECRET_KEY = "django-insecure-toz+*lt(ejm!l*)92w2ciqoh^1kz#a(abbpcn54-dbw(nxoy&7
 DEBUG = True
 
 ALLOWED_HOSTS = []
-
+if DEBUG:
+    ALLOWED_HOSTS = ["0.0.0.0", "localhost", "127.0.0.1"]
 
 # Application definition
 
@@ -40,8 +41,13 @@ INSTALLED_APPS = [
     "django.contrib.messages",
     "django.contrib.staticfiles",
     "rest_framework",
+    "drf_yasg",
 ]
 
+SWAGGER_SETTINGS = {
+    "SECURITY_DEFINITIONS": {"Bearer": {"type": "apiKey", "name": "Authorization", "in": "header"}}
+}
+
 MIDDLEWARE = [
     "django.middleware.security.SecurityMiddleware",
     "django.contrib.sessions.middleware.SessionMiddleware",
@@ -118,7 +124,12 @@ SIMPLE_JWT = {
 }
 
 REST_FRAMEWORK = {
-    "DEFAULT_AUTHENTICATION_CLASSES": ("rest_framework_simplejwt.authentication.JWTAuthentication",)
+    "DEFAULT_AUTHENTICATION_CLASSES": (
+        "rest_framework_simplejwt.authentication.JWTAuthentication",
+    ),
+    "DEFAULT_FILTER_BACKENDS": ["django_filters.rest_framework.DjangoFilterBackend"],
+    "DEFAULT_PAGINATION_CLASS": "rest_framework.pagination.LimitOffsetPagination",
+    "PAGE_SIZE": 100,
 }
 
 

backend/backend/urls.py

@@ -6,8 +6,21 @@ from rest_framework_simplejwt.views import (
     TokenRefreshView,
 )
 
+from rest_framework import permissions
+from drf_yasg.views import get_schema_view
+from drf_yasg import openapi
+
 from .api import router
 
+schema_view = get_schema_view(
+    openapi.Info(
+        title="ToDo List",
+        default_version="v1",
+        description="Swagger Interface for ToDo List",
+    ),
+    public=True,
+    permission_classes=(permissions.AllowAny,),
+)
 
 urlpatterns = [
     path("admin/", admin.site.urls),
@@ -15,4 +28,5 @@ urlpatterns = [
     path("api/token/refresh/", TokenRefreshView.as_view(), name="token_refresh"),
     path("api/", include(router.urls)),
     path("api-auth/", include("rest_framework.urls", namespace="rest_framework")),
+    path("swagger/", schema_view.with_ui("swagger", cache_timeout=0), name="schema-swagger-ui"),
 ]

backend/requirements.txt

@@ -1,4 +1,5 @@
 djangorestframework==3.12.4
+django-filter==2.4.0
 markdown==3.3.4
 appdirs==1.4.4
 asgiref==3.3.4
@@ -21,3 +22,4 @@ toml==0.10.2
 urllib3==1.26.4
 djangorestframework-simplejwt==4.6.0
 psycopg2-binary>=2.8
+drf-yasg==1.20.0

frontend/api.py

@@ -0,0 +1,333 @@
+from types import SimpleNamespace
+import urllib
+import requests
+
+DEFAULT_URL = "http://127.0.0.1:8000"
+
+API_TODO_ITEMS_LIST = "api/todo_items/"
+API_TODO_ITEMS_CREATE = "api/todo_items/"
+API_TODO_ITEMS_READ = "api/todo_items/{0}/"
+API_TODO_ITEMS_UPDATE = "api/todo_items/{0}/"
+API_TODO_ITEMS_PARTIAL_UPDATE = "api/todo_items/{0}/"
+API_TODO_ITEMS_DELETE = "api/todo_items/{0}/"
+
+API_LISTS_LIST = "api/lists/"
+API_LISTS_CREATE = "api/lists/"
+API_LISTS_READ = "api/lists/{0}/"
+API_LISTS_UPDATE = "api/lists/{0}/"
+API_LISTS_PARTIAL_UPDATE = "api/lists/{0}/"
+API_LISTS_DELETE = "api/lists/{0}/"
+
+API_TOKEN_CREATE = "api/token/"
+API_TOKEN_REFRESH = "api/token/refresh/"
+
+
+class UserApi(object):
+    def __init__(self, url=DEFAULT_URL, token=None):
+        """
+        Constructor
+
+        Parameters
+        ----------
+        url : str, optional
+            Server url. The default is DEFAULT_URL.
+        token : dict, optional
+            Existing user tokens to bypass authorization.
+            The default is None.
+
+        Returns
+        -------
+        None.
+
+        """
+        self.token = token
+        self.get_api = lambda x: urllib.parse.urljoin(url, x)
+
+    # ToDo - store tokens in config
+    def auth(self, user, passwd):
+        """
+        Authosization
+
+        Parameters
+        ----------
+        user : str
+            Login.
+        passwd : str
+            Password.
+
+        Returns
+        -------
+        dict
+            Generated auth token.
+
+        """
+        token = UserApi._raise_or_return_(
+            requests.post(
+                url=self.get_api(API_TOKEN_CREATE), json={"username": user, "password": passwd}
+            )
+        )
+        self.token = SimpleNamespace(**token)
+        return self.token
+
+    def refresh(self):
+        """
+        Refresh existing token
+        """
+        token = UserApi._raise_or_return_(
+            requests.post(url=self.get_api(API_TOKEN_REFRESH), json={"refresh": self.token.refresh})
+        )
+        self.token.access = token["access"]
+        return self.token
+
+    def lists_list(self, **argv):
+        """
+        List all the exsiting to-do lists.
+        Auth required
+
+        Returns
+        -------
+        list
+            to-do lists.
+
+        """
+        return UserApi._raise_or_return_(
+            requests.get(
+                url=self.get_api(API_LISTS_LIST), headers=self._access_token_(), params=argv
+            )
+        )
+
+    def lists_create(self, title="Untitled"):
+        """
+        Create a new to-do list
+        Auth required
+
+        Parameters
+        ----------
+        title : str, optional
+            New list name. The default is "Untitled".
+
+        """
+        return UserApi._raise_or_return_(
+            requests.post(
+                url=self.get_api(API_LISTS_CREATE),
+                json={"title": title},
+                headers=self._access_token_(),
+            )
+        )
+
+    def lists_delete(self, id):
+        """
+        Auth required
+
+        Deletes a to-do list by id
+
+        Parameters
+        ----------
+        id: to-do list id to delete
+        """
+        return UserApi._raise_or_return_(
+            requests.delete(
+                url=self.get_api(API_LISTS_DELETE.format(id)),
+                headers=self._access_token_(),
+            )
+        )
+
+    def lists_update(self, title, id):
+        """
+        Rename a new to-do list
+        Auth required
+
+        Parameters
+        ----------
+        title : str
+            New name for a list.
+        id : int
+
+        """
+        return UserApi._raise_or_return_(
+            requests.put(
+                url=self.get_api(API_LISTS_UPDATE.format(id)),
+                json={"title": title},
+                headers=self._access_token_(),
+            )
+        )
+
+    def todo_items_list(self, **argv):
+        """
+        List all the exsiting to-do items.
+        Auth required
+
+        Returns
+        -------
+        list
+            to-do items.
+
+        """
+        return UserApi._raise_or_return_(
+            requests.get(
+                url=self.get_api(API_TODO_ITEMS_LIST), headers=self._access_token_(), params=argv
+            )
+        )
+
+    def todo_items_create(self, parent, text="Note"):
+        """
+        Create a new to-do item
+        Auth required
+
+        Parameters
+        ----------
+        parent : id of parent list
+        text : str, optional
+            New note. The default is "Note".
+
+        """
+        return UserApi._raise_or_return_(
+            requests.post(
+                url=self.get_api(API_TODO_ITEMS_CREATE),
+                json={"text": text, "parent": parent, "finished": False},
+                headers=self._access_token_(),
+            )
+        )
+
+    def todo_items_delete(self, id):
+        """
+        Auth required
+
+        Deletes a to-do item by id
+
+        Parameters
+        ----------
+        id: to-do item id to delete
+        """
+        return UserApi._raise_or_return_(
+            requests.delete(
+                url=self.get_api(API_TODO_ITEMS_DELETE.format(id)),
+                headers=self._access_token_(),
+            )
+        )
+
+    def todo_items_update(self, id, text, finished, parent):
+        """
+        Rename a new to-do list
+        Auth required
+
+        Parameters
+        ----------
+        id : int
+            Note id
+        text : str
+            New note for the item.
+        finished : bool
+            New state for the item
+        parent : int
+            Parent list id
+        """
+        return UserApi._raise_or_return_(
+            requests.put(
+                url=self.get_api(API_TODO_ITEMS_UPDATE.format(id)),
+                json={"text": text, "finished": finished, "parent": parent},
+                headers=self._access_token_(),
+            )
+        )
+
+    # def create(self, title="Untitled"):
+    # """
+    # Create a new to-do list
+    # Auth required
+
+    # Parameters
+    # ----------
+    # title : str, optional
+    # New list name. The default is "Untitled".
+
+    # """
+    # response = requests.post(
+    # url=self.get_api(API_LISTS_CREATE), json={"title": title}, headers=self._access_token_()
+    # url=self.get_api(API_TODO_ITEMS_CREATE), json={"title": title}, headers=self._access_token_()
+    # )
+    # response.raise_for_status()
+    # return response.json()
+
+    # def read(self, id):
+    # """
+    # Read a to-do list contents
+
+    # Parameters
+    # ----------
+    # id : int
+    # List id.
+
+    # Returns
+    # -------
+    # list
+    # Requested contents
+
+    # """
+    # response = requests.post(
+    # url=self.get_api(API_LISTS_READ).format(id), headers=self._access_token_()
+    # )
+    # response.raise_for_status()
+    # return response.json()
+
+    # def update(self, id, title="Untitled"):
+    # """
+    # Add a to-do item to the list
+
+    # Parameters
+    # ----------
+    # id : int
+    # List id.
+    # title : str, optional
+    # To-do item title. The default is "Untitled".
+
+    # """
+    # response = requests.put(
+    # json={"title": title},
+    # url=self.get_api(API_LISTS_UPDATE).format(id),
+    # headers=self._access_token_(),
+    # )
+    # response.raise_for_status()
+    # return response.json()
+
+    # def partial_update(self, id, title="Untitled"):
+    # """
+    # Update list item - untrusted
+
+    # """
+    # response = requests.patch(
+    # json={"title": title},
+    # url=self.get_api(API_LISTS_PARTIAL_UPDATE).format(id),
+    # headers=self._access_token_(),
+    # )
+    # response.raise_for_status()
+    # return response.json()
+
+    # def delete(self, id):
+    # """
+    # Delete list
+
+    # Parameters
+    # ----------
+    # id : int
+    # List id to delete.
+
+    # """
+    # response = requests.delete(
+    # url=self.get_api(API_LISTS_DELETE).format(id), headers=self._access_token_()
+    # )
+    # response.raise_for_status()
+    # return response.json()
+
+    def _access_token_(self):
+        if self.token is None:
+            raise RuntimeError("Authosization required for requested operation!")
+        return {"Authorization": f"Bearer {self.token.access}"}
+
+    @staticmethod
+    def _raise_or_return_(response):
+        response.raise_for_status()
+        try:
+            return response.json()
+        except Exception as e:
+            print(e)
+            return response.content

frontend/api_demo.py

@@ -0,0 +1,50 @@
+import random
+from user import User
+
+
+def print_lists(lists):
+    for item in lists:
+        print(
+            f"List: '{item.title}'", f"Id: {item.id}", "|", "|".join([str(x) for x in item.items_])
+        )
+
+
+DEFAULT_URL = "http://127.0.0.1:8000"
+
+user = User(url=DEFAULT_URL)
+user.auth("root", "root")
+user.refresh()
+
+# Fetch existing lists:
+print_lists(user.fetchUserLists())
+
+# Append a new list to user:
+print("Appending list...")
+scroll = user.appendUserList(title="a new list!")
+print_lists(user.fetchUserLists())
+
+# Modify list 0:
+print("Modifyng list...")
+user.lists_[0].modify(title=f"A new title №{random.random()}")
+print_lists(user.fetchUserLists())
+
+# Append item to list:
+print("Appending item to last list...")
+item = user.lists_[-1].append(text="this is an item")
+print_lists(user.fetchUserLists())
+
+# Modifying item
+print("Modifyng appended item...")
+item.modify(finished=True, text="this is an updated item")
+print_lists(user.fetchUserLists())
+
+# Removing item at from last list
+print("Removing the last item from the last list...")
+user.lists_[-1].remove(-1)
+print_lists(user.fetchUserLists())
+
+# Remove user list by id:
+i = user.lists_[0].id
+print(f"Removing {i}...")
+user.removeUserList(i)
+print_lists(user.fetchUserLists())

frontend/login.py

@@ -0,0 +1,88 @@
+import tkinter as tk
+from user import User
+import message
+
+
+class LoginFrame(tk.Frame):
+
+    loggedIn = False
+
+    def __init__(self, master=None, url=None) -> None:
+        """
+        Функция инициаизации класса
+        """
+        super().__init__(master)
+
+        # Иницализируем параметры окна
+        self.master = master
+        self.pack(fill=tk.BOTH, expand=1)
+
+        # self.grid(row=0, column=0, sticky=tk.N + tk.S + tk.E + tk.W)
+        # tk.Grid.rowconfigure(master, 0, weight=1)
+        # tk.Grid.columnconfigure(master, 0, weight=1)
+
+        # Иницализируем параметры пользователя
+        self.user = User(url=url)
+
+        # Настраиваем размеры и включаем иницализацию
+        self.initAUTH()
+
+    def login_clicked(self) -> None:
+        """
+        Функция авторизации
+        """
+        try:
+            self.user.auth(self.login.get(), self.password.get())
+            self.loggedIn = True
+        except Exception as ex:
+            print(ex)
+            message.invalid_login()
+
+    # Если захочется реализовать в логине
+    """
+    @property
+    def remember(self):
+        return self.rbtn_var.get()
+    """
+
+    def initAUTH(self) -> None:
+        """
+        Создает окно авторизации программы
+        """
+        # Конфигурируем сетку
+        for rows in range(25):
+            tk.Grid.rowconfigure(self, rows, weight=1)
+
+        for columns in range(25):
+            tk.Grid.columnconfigure(self, columns, weight=1)
+
+        # Подпись и поле ввода для логина
+        login_label = tk.Label(self, text="Введите логин")
+        login_label.grid(row=9, column=12, columnspan=3, rowspan=1, sticky="nsew")
+
+        self.login = tk.Entry(self)
+        self.login.grid(row=10, column=12, columnspan=3, rowspan=1, sticky="nsew")
+
+        # Подпись и поле ввода для пароля
+        password_label = tk.Label(self, text="Введите пароль")
+        password_label.grid(row=11, column=12, columnspan=3, rowspan=1, sticky="nsew")
+
+        self.password = tk.Entry(self, show="*")
+        self.password.grid(row=12, column=12, columnspan=3, rowspan=1, sticky="nsew")
+
+        # Кнопка авториазции
+        btn = tk.Button(self, text="Войти", command=self.login_clicked)
+        btn.grid(row=14, column=12, columnspan=3, rowspan=1, sticky="nsew")
+
+        # Если захочется реализовать в логине
+        """
+        # Запомнить пользователя
+        self.rbtn_var = tk.IntVar(value=0)
+        rbtn = tk.Checkbutton(
+            self,
+            text="Запомнить меня",
+            variable=self.rbtn_var,
+            command=None
+        )
+        rbtn.grid(row=15, column=12, columnspan=3, rowspan=1, sticky="nsew")
+        """

frontend/message.py

@@ -0,0 +1,20 @@
+from tkinter import messagebox as mb
+
+TITLE_INFO_BOX = "Сообщение!"
+MESSAGE_INVALID_LOGIN = "Неправильный логин или пароль"
+MESSAGE_EMPTY = "Сдесь могло быть ваше сообщение"
+
+
+def infobox(msg: str = None) -> None:
+    """
+    Показывает передаваемое сообщение в messagebox
+
+    :param msg: передаваемое сообщение
+    """
+    if msg is None:
+        msg = MESSAGE_EMPTY
+    mb.showinfo(TITLE_INFO_BOX, msg)
+
+
+def invalid_login():
+    infobox(MESSAGE_INVALID_LOGIN)

frontend/todo_tk.py

@@ -1,14 +1,67 @@
 #!/usr/bin/env python3
 
+import sys
 import tkinter as tk
+from login import LoginFrame
+from workspace import WorkSpaceFrame
+from user import User
+
+if "win" in sys.platform.lower():
+    DEFAULT_URL = "http://localhost:8000"
+else:
+    DEFAULT_URL = "http://0.0.0.0:8000"
+
+BASE_W = 600
+BASE_H = 400
+
+TITLE_APP = "ToDo Application"
 
 
-class Application(tk.Frame):
-    def __init__(self, master=None):
-        super().__init__(master)
+class Application(tk.Tk):
+    def __init__(self):
+        super().__init__()
+        self.center_window()
+        self.title(TITLE_APP)
+
+    def login(self):
+        """Возвращает пользователя - его можно потом сериализовать"""
+        # Пользователь сохранен! Авторизация не нужна!
+        try:
+            user = User.load()
+            if user is not None:
+                return user
+        except Exception as e:
+            print("Failed to restore login:", e)
+        # Не удалось - нужен логин
+        self.frame = LoginFrame(master=self, url=DEFAULT_URL)
+        while not self.frame.loggedIn:
+            self.update_idletasks()
+            self.update()
+        self.frame.destroy()
+        # Нужно запомнить пользователя
+        # if self.frame.remember:
+        #    self.frame.user.save()
+        return self.frame.user
+
+    def main(self, user):
+        self.frame = WorkSpaceFrame(master=self, user=user)
+        self.mainloop()
+
+    def center_window(self, width: str = BASE_W, heigh: str = BASE_H) -> None:
+        """
+        Центрирует приложение по центру экрана
+
+        :param width: ширина окна
+        :param heigh: высота окна
+        """
+        sw = self.winfo_screenwidth()
+        sh = self.winfo_screenheight()
+
+        x = (sw - width) / 2
+        y = (sh - heigh) / 2
+        self.geometry("%dx%d+%d+%d" % (width, heigh, x, y))
 
 
 if __name__ == "__main__":
     app = Application()
-    app.master.title("ToDo")
-    app.mainloop()
+    app.main(app.login())

frontend/user.py

@@ -0,0 +1,252 @@
+import os
+import random
+from datetime import datetime
+from types import SimpleNamespace
+
+from pathlib import Path
+
+import json
+
+from api import UserApi
+
+LIST_UPDATEBLE = ["title"]
+TODO_ITEM_UPDATEBLE = ["text", "finished"]
+UPDATE_ERROR = "Failed to update property: {0}"
+
+DATETIME_STR = "%Y-%m-%dT%H:%M:%S.%fZ"
+
+USER_TOKEN_PATH = os.path.join(Path.home(), ".todo_config.json")
+
+
+def bad_arguments(x, d):
+    return list((set(x) - set(d)))
+
+
+def date_or_str(inpt):
+    if type(inpt) is datetime:
+        return inpt
+    elif type(inpt) is str:
+        return datetime.strptime(inpt, DATETIME_STR)
+    else:
+        return datetime.now()
+
+
+class ToDoList(object):
+    def __init__(self, id, title, created_at=None, items=None, parent=None, user=None):
+        self.id = id
+        self.title = title
+        self.items_ = [] if items is None else items
+        self.created_at = date_or_str(created_at)
+        self.user = user
+
+    def __iter__(self):
+        for item in self.items_:
+            yield item
+
+    def __getitem__(self, index):
+        return self.items_[index]
+
+    def __len__(self):
+        return len(self.items_)
+
+    def __str__(self):
+        return f"[{self.id}] {self.title}"
+
+    def index(self, value):
+        return self.items_.index(value)
+
+    def remove(self, index):
+        """
+        Remove item AT INDEX from db
+        """
+        item = self.items_[index]
+        self.items_.remove(item)
+        item.dispose()
+
+    def append(self, text):
+        """
+        Add a new item to db
+        """
+        if "DEBUG" in os.environ:
+            created_item = ToDoItem(id=random.randint(100, 1000), text=text, user=self.user)
+        else:
+            created_item = self.user.todo_items_create(parent=self.id, text=text)
+            created_item = ToDoItem(**created_item, user=self.user)
+        self.items_.append(created_item)
+        return created_item
+
+    def modify(self, **argv):
+        bad = bad_arguments(argv.keys(), LIST_UPDATEBLE)
+        if len(bad) > 0:
+            raise RuntimeError(UPDATE_ERROR.format(bad[0]))
+        for key, value in argv.items():
+            setattr(self, key, value)
+        self.sync()
+
+    def dispose(self):
+        print(f"To-do list id '{self.id}' is being disposed of...")
+        for item in self.items_:
+            item.dispose()
+        if "DEBUG" in os.environ:
+            return
+        self.user.lists_delete(self.id)
+
+    def sync(self):
+        print(f"Item '{self}' is being synchronized...")
+        if "DEBUG" in os.environ:
+            return
+        self.user.lists_update(title=self.title, id=self.id)
+
+
+class ToDoItem(object):
+    def __init__(self, id, text, finished=False, created_at=None, parent=None, user=None):
+        self.id = id
+        self.text = text
+        self.finished = finished
+        self.created_at = date_or_str(created_at)
+        self.parent = parent
+        self.user = user
+
+    def __str__(self):
+        return f"[{self.id}] {self.text}"
+
+    def modify(self, **argv):
+        bad = bad_arguments(argv.keys(), TODO_ITEM_UPDATEBLE)
+        if len(bad) > 0:
+            raise RuntimeError(UPDATE_ERROR.format(bad[0]))
+        for key, value in argv.items():
+            setattr(self, key, value)
+        self.sync()
+
+    def dispose(self):
+        print(f"To-do item id '{self.id}' is being disposed of...")
+        if "DEBUG" in os.environ:
+            return
+        self.user.todo_items_delete(self.id)
+
+    def sync(self):
+        print(f"Item '{self}' is being synchronized...")
+        if "DEBUG" in os.environ:
+            return
+        self.user.todo_items_update(
+            id=self.id, text=self.text, finished=self.finished, parent=self.parent
+        )
+
+
+def make_debug_lists():
+    return [
+        ToDoList(
+            id=i,
+            title=f"List {i}",
+            created_at=datetime.now(),
+            items=[
+                ToDoItem(id=i * 10 + j, text=f"Item {i*10+j}", created_at=datetime.now())
+                for j in range(10)
+            ],
+        )
+        for i in range(10)
+    ]
+
+
+class User(UserApi):
+    def auth(self, user, passwd):
+        """
+        Basic authentification
+        """
+        if "DEBUG" in os.environ:
+            return
+        return UserApi.auth(self, user, passwd)
+
+    def remove(self):
+        """
+        Remove the login file from homedir
+        """
+        if "DEBUG" in os.environ:
+            print("Debug mode is on - no login storing")
+            return
+        if not os.path.exists(USER_TOKEN_PATH):
+            return
+        try:
+            os.remove(USER_TOKEN_PATH)
+        except Exception as e:
+            raise RuntimeError("Failed to remove tokens:", e)
+
+    def save(self):
+        """
+        Store user token in homedir
+        """
+        if "DEBUG" in os.environ:
+            print("Debug mode is on - no login storing")
+            return
+        try:
+            with open(USER_TOKEN_PATH, "w") as handler:
+                json.dump(self.token.__dict__, handler)
+        except Exception as e:
+            raise RuntimeError("Failed to store tokens:", e)
+
+    @staticmethod
+    def load():
+        """
+        Restore user token from the file in homedir
+        """
+        if "DEBUG" in os.environ:
+            raise RuntimeError("Debug mode is on - no login storing")
+        if os.path.exists(USER_TOKEN_PATH):
+            try:
+                with open(USER_TOKEN_PATH, "r") as handler:
+                    user = User(token=SimpleNamespace(**json.load(handler)))
+                    user.refresh()
+                    return user
+            except Exception as e:
+                raise RuntimeError("Failed to restore tokens:", e)
+        return None
+
+    # Storing lists - mostly for debug purposes
+    lists_ = make_debug_lists()
+
+    def fetchUserLists(self):
+        """
+        Fetch existing user lists from the server
+        returns: fetched list of ToDoList sorted by creation datetime
+        """
+        print("Fetching lists...")
+        if "DEBUG" in os.environ:
+            return self.lists_
+        user_lists = self.lists_list()["results"]
+        user_items = self.todo_items_list()["results"]
+        todo_lists = {x["id"]: ToDoList(**x, user=self) for x in user_lists}
+        todo_items = [ToDoItem(**x, user=self) for x in user_items]
+        for todo_item in todo_items:
+            # Catching stray items
+            # if not hasattr(toDoItem, "parent"):
+            #    toDoItem.dispose()
+            #    continue
+            todo_lists[todo_item.parent].items_.append(todo_item)
+        for todo_list in todo_lists.values():
+            todo_list.items_ = sorted(todo_list.items_, key=lambda x: x.created_at)
+        self.lists_ = sorted(todo_lists.values(), key=lambda x: x.created_at)
+        return self.lists_
+
+    def removeUserList(self, id):
+        """
+        Remove existing user to-do list BY ID from the serverreturns:
+        """
+        to_remove = [item for item in self.lists_ if item.id == id][0]
+        self.lists_.remove(to_remove)
+        # if not ("DEBUG" in os.environ):
+        to_remove.dispose()
+        return self.lists_
+
+    def appendUserList(self, title):
+        """
+        Create a new user list
+        title: title of list to create
+        returns: created item
+        """
+        if "DEBUG" in os.environ:
+            item = ToDoList(id=random.randint(100, 1000), title=title, created_at=datetime.now())
+            self.lists_.append(item)
+            return item
+        created_list = self.lists_create(title=title)
+        created_list = ToDoList(**created_list)
+        return created_list

frontend/workspace.py

@@ -0,0 +1,219 @@
+import tkinter as tk
+
+
+def str_time(time):
+    return time.strftime("%Y-%m-%d %H:%M:%S")
+
+
+TODO_ITEM_TABLE_TEXT_WIDTH = 15
+TODO_ITEM_TABLE_FINISHED_WIDTH = 8
+TODO_ITEM_TABLE_CREATED_AT_WIDTH = 15
+
+
+def placeholder():
+    print("Не реализовано")
+
+
+class ToDoItemWidget(tk.Frame):
+    @staticmethod
+    def header(parent):
+        body = tk.Frame(parent)
+
+        text = tk.Label(body, text="Текст", width=TODO_ITEM_TABLE_TEXT_WIDTH)
+        text.pack(side="left")
+
+        text = tk.Label(body, text="Выполнено", width=TODO_ITEM_TABLE_FINISHED_WIDTH)
+        text.pack(side="left")
+
+        text = tk.Label(body, text="Создано", width=TODO_ITEM_TABLE_CREATED_AT_WIDTH)
+        text.pack(side="left")
+
+        return body
+
+    def __init__(self, *args, item, **argv):
+        super().__init__(*args, **argv)
+
+        self.parent = self.master
+        self.item = item
+
+        self.noteLabel = tk.Label(self, text=item.text, width=TODO_ITEM_TABLE_TEXT_WIDTH)
+        self.noteLabel.pack(side="left")
+
+        self.finished = tk.IntVar(value=int(item.finished))
+        self.finishedButton = tk.Checkbutton(
+            self,
+            variable=self.finished,
+            command=self.finishedButton_command,
+            width=TODO_ITEM_TABLE_FINISHED_WIDTH,
+        )
+        self.finishedButton.pack(side="left")
+
+        self.createdAt = tk.Label(
+            self, text=str_time(item.created_at), width=TODO_ITEM_TABLE_CREATED_AT_WIDTH
+        )
+        self.createdAt.pack(side="left")
+
+        self.remove = tk.Button(self, text="Удалить", command=lambda: self.parent.remove(self.item))
+        self.remove.pack(side="left")
+
+    def finishedButton_command(self):
+        self.item.modify(finished=self.finished.get() > 0)
+
+
+class ToDoListWidget(tk.Frame):
+    def __init__(self, *args, delete_list, **argv):
+        super().__init__(*args, **argv)
+        self.delete_list = delete_list
+
+    def fill(self, itemList):
+
+        header = ToDoItemWidget.header(self)
+        header.pack(side="left")
+        header.pack(side="top", fill="y")
+
+        self.itemList = itemList
+
+        for item in itemList:
+            item = ToDoItemWidget(self, item=item)
+            item.pack(side="top", fill="y")
+
+        self.itemToAdd = tk.Text(self, width=15, height=1)
+        self.itemToAdd.pack(side="top")
+
+        add = tk.Button(self, text="Добавить заметку", command=self.add_command)
+        add.pack(side="top")
+
+        delete = tk.Button(self, text="Удалить лист", command=self.delete_list)
+        delete.pack(side="top")
+
+    def update(self, itemList=None):
+        self.clear()
+        if itemList is None:
+            self.fill(self.itemList)
+        else:
+            self.fill(itemList)
+
+    def add_command(self):
+        self.itemList.append(self.itemToAdd.get(1.0, "end"))
+        self.update()
+
+    def remove(self, item):
+        self.itemList.remove(self.itemList.index(item))
+        self.update()
+
+    def clear(self):
+        for widget in self.winfo_children():
+            widget.destroy()
+
+
+class WorkSpaceFrame(tk.Frame):
+    def delete_list(self, *args):
+        selection = self.listBox.curselection()
+        cur = selection[0]
+        self.user.removeUserList(self.lists[cur].id)
+        self.lists = self.user.fetchUserLists()
+        self.update_lists()
+        if len(self.lists) > 1:
+            self.listBox.selection_set(first=cur - 1)
+        elif len(self.lists) > 0:
+            self.listBox.selection_set(first=0)
+
+    def __init__(self, user, master=None, url=None) -> None:
+        """
+        Функция инициаизации класса
+        """
+        super().__init__(master)
+
+        self.master = master
+        self.user = user
+
+        self.pack(fill=tk.BOTH, expand=1)
+        self.initLayout(user)
+
+    def destroy(self):
+        tk.Tk.destroy(self)
+        if self.rbtn_var.get() > 0:
+            self.user.save()
+        else:
+            self.user.remove()
+
+    def initLayout(self, user):
+
+        # Запомнить пользователя
+        self.rbtn_var = tk.IntVar(value=1)
+        rbtn = tk.Checkbutton(self, text="Запомнить меня", variable=self.rbtn_var, command=None)
+        rbtn.pack(anchor="n")
+
+        # data
+        self.lists = user.fetchUserLists()
+
+        self.add_list_text = tk.Text(self, width=15, height=1)
+        self.add_list_text.pack(anchor="sw")
+
+        add = tk.Button(self, text="Добавить лист", command=self.add_list)
+        add.pack(anchor="sw")
+
+        # select list box
+        self.listBox = tk.Listbox(self, width=30, selectmode=tk.SINGLE)
+        self.listBox.pack(side="left", fill="y")
+        self.listBox.bind("<<ListboxSelect>>", self.listBox_selected)
+
+        # scroll bar
+        scrollbar = tk.Scrollbar(self, orient="vertical")
+        scrollbar.config(command=self.listBox.yview)
+        scrollbar.pack(side="left", fill="y")
+
+        # add scroll bar to list box
+        self.listBox.config(yscrollcommand=scrollbar.set)
+
+        # init list view
+        self.update_lists()
+
+        # canvas for todo lists
+        canvas = tk.Canvas(self)
+        canvas.pack(side="left", fill="both", expand=1)
+        scrollbar = tk.Scrollbar(self, orient="vertical")
+        scrollbar.config(command=canvas.yview)
+        scrollbar.pack(side="left", fill="y")
+        canvas.configure(yscrollcommand=scrollbar.set)
+
+        # todo lists
+        self.toDoList = ToDoListWidget(self, delete_list=self.delete_list)
+        self.toDoList.grid_propagate(True)
+        # self.toDoList = ToDoListWidget(canvas)
+        self.toDoList.pack(side="left", fill="y")
+        canvas.bind("<Configure>", lambda *argv: canvas.configure(scrollregion=canvas.bbox("all")))
+        canvas.create_window((0, 0), window=self.toDoList, anchor="nw")
+
+        # select list!
+        if len(self.lists) > 0:
+            self.listBox.selection_set(first=0)
+            self.listBox_selected()
+
+    def update_lists(self):
+        self.listBox.delete(0, "end")
+        for item in self.lists:
+            s = f"{str(item)}: {item.created_at.strftime('%Y-%m-%d %H:%M:%S')}"
+            self.listBox.insert(tk.END, s)
+        self.listBox.pack()
+        return len(self.lists)
+
+    def add_list(self, *args):
+        text = self.add_list_text.get(1.0, "end").strip()
+        if len(text) == 0:
+            print("empty name! Not adding!")
+            return
+        self.user.appendUserList(title=text)
+        self.lists = self.user.fetchUserLists()
+
+        # fill list box
+        self.update_lists()
+        len(self.lists) > 0 and self.listBox.selection_set(first=len(self.lists) - 1)
+
+    def listBox_selected(self, *args):
+        self.toDoList.clear()
+
+        selection = self.listBox.curselection()
+        cur = selection[0]
+
+        self.toDoList.fill(self.lists[cur])