commit 3c2137da2b82fa3aeb11d13ec8b20a454eaf26cc
Author: helldh <danya3utckin@yandex.ru>
Date:   Thu Dec 25 21:44:30 2025 +0300

    initial

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..129c041
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+.venv
+__pycache__
+*\.pyc
diff --git a/composer.py b/composer.py
new file mode 100644
index 0000000..e88f7e1
--- /dev/null
+++ b/composer.py
@@ -0,0 +1,72 @@
+from src.windows import LoginWindow, AdminWindow, ClientWindow
+from src.objects import User, Rights
+from src.db import DB_AUTH_HARDCODED as config
+
+from PyQt6.QtWidgets import QApplication
+from PyQt6.QtCore import QObject, pyqtSlot, pyqtSignal
+from PyQt6.QtSql import QSqlDatabase
+
+class Composer(QObject):
+    render_request = pyqtSignal(User)
+
+    def __init__(self):
+        super().__init__()
+        self._current = None
+        self._app = QApplication([])
+        self._init_db()
+        self.render_request.connect(self._render)
+
+    def _init_db(self):
+        self._db = QSqlDatabase("QPSQL")
+        self._db.setDatabaseName(config['dbname'])
+        self._db.setPort(config['port'])
+        self._db.setHostName(config['host'])
+        self._db.setUserName(config['user'])
+        self._db.setPassword(config['password'])
+        self._db.open()
+
+    @pyqtSlot(User)
+    def _render(self, user: User):
+        match user.rights:
+            case Rights.ADMIN:
+                self._admin_fabric()
+            case Rights.MANAGER:
+                pass
+            case Rights.CLIENT:
+                self._client_fabric(user)
+
+    def _login_fabric(self):
+        self.wlogin = LoginWindow(self, self._db)
+
+        if self._current:
+            self._current.close()
+
+        self.wlogin.show()
+
+        self._current = self.wlogin
+
+    def _admin_fabric(self):
+        self.wadmin = AdminWindow(self, self._db)
+
+        if self._current:
+            self._current.close()
+
+        self.wadmin.show()
+
+        self._current = self.wadmin
+
+    def _client_fabric(self, user: User):
+        self.wclient = ClientWindow(self, self._db, user)
+
+        if self._current:
+            self._current.close()
+
+        self.wclient.show()
+
+        self._current = self.wclient
+
+    def run(self):
+        import sys
+        self._login_fabric()
+        self._current.show()
+        sys.exit(self._app.exec())
\ No newline at end of file
diff --git a/main.py b/main.py
new file mode 100644
index 0000000..a7ddfea
--- /dev/null
+++ b/main.py
@@ -0,0 +1,8 @@
+from composer import Composer
+
+def main():
+    composer = Composer()
+    composer.run()
+
+if __name__ == "__main__":
+    main()
\ No newline at end of file
diff --git a/scrapper.sh b/scrapper.sh
new file mode 100755
index 0000000..7c70281
--- /dev/null
+++ b/scrapper.sh
@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+
+OUTPUT="all_code.txt"
+ROOT="."
+
+> "$OUTPUT"
+
+find "$ROOT" \
+  -type d -name "__pycache__" -prune -o \
+  -type f -name "*.py" ! -name "*.pyc" \
+  -print | sort | while read -r file; do
+    echo "########################################" >> "$OUTPUT"
+    echo "# FILE: $file" >> "$OUTPUT"
+    echo "########################################" >> "$OUTPUT"
+    echo >> "$OUTPUT"
+    cat "$file" >> "$OUTPUT"
+    echo -e "\n\n" >> "$OUTPUT"
+done
diff --git a/src/__init__.py b/src/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/db.py b/src/db.py
new file mode 100644
index 0000000..150b108
--- /dev/null
+++ b/src/db.py
@@ -0,0 +1,153 @@
+import psycopg2 as pg
+
+from .objects import User, Rights
+
+DB_AUTH_HARDCODED = {
+    "host": "127.0.0.1",
+    "port": 5432,
+    "dbname": "examdb",
+    "user": "postgres",
+    "password": "213k2010###"
+}
+
+def get_connection():
+    return pg.connect(**DB_AUTH_HARDCODED)
+
+def do_request(autocommit=False):
+    def upper_wrapper(func):
+        def wrapper(*args, **kwargs):
+            conn = get_connection()
+            cursor = conn.cursor()
+
+            try:
+                kwargs['cursor'] = cursor
+
+                result = func(*args, **kwargs)
+
+                if autocommit:
+                    conn.commit()
+
+                return result
+
+            except Exception as e:
+                print(f"Error: Can't request query to DB: {e}")
+                return None
+
+            finally:
+                cursor.close()
+                conn.close()
+
+        return  wrapper
+
+    return upper_wrapper
+
+@do_request()
+def auth(login: str, password: str, *, cursor) -> User | None:
+    cursor.execute("""
+        SELECT id, name, rights
+        FROM users
+        WHERE name = %s
+        AND password = %s;
+    """, (login, password))
+
+    user = cursor.fetchone()
+
+    if not user:
+        print("Warning: Login Forbidden: Can't find such user!")
+        return None
+
+    rights = None
+
+    match user[2]:
+        case "admin":
+            rights = Rights.ADMIN
+        case "customer":
+            rights = Rights.CLIENT
+        case "manager":
+            rights = Rights.MANAGER
+        case _:
+            return None
+
+    return User(
+        id=user[0],
+        name=user[1],
+        rights=rights
+    )
+
+@do_request()
+def get_free_numbers(*, cursor):
+    cursor.execute("""
+        SELECT *
+        FROM rooms
+        WHERE status = 'free';
+    """)
+
+    free = cursor.fetchall()
+
+    if not free:
+        return None
+
+    return free
+
+@do_request(autocommit=True)
+def update_number_status(number: str, checkin: str,
+                         checkout: str, user: User,
+                         *, cursor):
+    cursor.execute("""
+        SELECT password
+        FROM users
+        WHERE id = %s
+    """, (user.id,))
+
+    password = cursor.fetchone()
+
+    if not password:
+        return False
+
+    cursor.execute("""
+        SELECT id
+        FROM guests
+        WHERE name = %s
+        AND PHONE = %s
+    """, (user.name, password[0]))
+
+    guest = cursor.fetchone()
+
+    if not guest:
+        return False
+
+    cursor.execute("""
+        SELECT id
+        FROM rooms
+        WHERE number = %s;
+    """, (number,))
+
+    number_id = cursor.fetchone()
+
+    if not number_id:
+        return False
+
+    cursor.execute("""
+        SELECT guest, room
+        FROM bookings
+        WHERE guest = %s
+        AND room = %s;
+    """, (guest[0], number_id[0]))
+
+    request_exists = cursor.fetchone()
+
+    if request_exists:
+        return False
+
+    cursor.execute("""
+        INSERT INTO bookings(guest, room, checkin, checkout, status)
+        VALUES (%s, %s, %s, %s, 'active');
+    """, (guest[0], number_id[0], checkin, checkout))
+
+    cursor.execute("""
+        UPDATE rooms
+        SET status = 'booked'
+        WHERE number = %s;
+    """, (number,))
+
+    return True
\ No newline at end of file
diff --git a/src/objects.py b/src/objects.py
new file mode 100644
index 0000000..ad11e58
--- /dev/null
+++ b/src/objects.py
@@ -0,0 +1,17 @@
+from enum import Enum, auto
+from dataclasses import dataclass
+
+class SignalCode(Enum):
+    SIGFALSE = auto()
+    SIGERR = auto()
+
+class Rights(Enum):
+    ADMIN = auto()
+    CLIENT = auto()
+    MANAGER = auto()
+
+@dataclass
+class User:
+    id: int
+    name: str
+    rights: Rights
\ No newline at end of file
diff --git a/src/utils.py b/src/utils.py
new file mode 100644
index 0000000..b1d81e7
--- /dev/null
+++ b/src/utils.py
@@ -0,0 +1,70 @@
+from PyQt6.QtWidgets import (
+    QWidget,
+    QTableView,
+    QHBoxLayout,
+    QVBoxLayout,
+    QDateEdit,
+    QPushButton,
+    QLabel
+)
+from PyQt6.QtSql import QSqlTableModel
+
+class TabWidgetCustom(QWidget):
+    def __init__(self, name: str, db):
+        super().__init__()
+        self._name = name
+        self._db = db
+        self._setup()
+
+    def _setup(self):
+        self.root = QVBoxLayout(self)
+
+        if self._name in ("bookings", "payments"):
+            self.header = QHBoxLayout()
+
+            self.from_date = QDateEdit()
+            self.from_date.setCalendarPopup(True)
+
+            self.to_date = QDateEdit()
+            self.to_date.setCalendarPopup(True)
+
+            self.button_filter = QPushButton("Фильтровать")
+            self.button_all = QPushButton("Показать всё")
+
+            self.header.addWidget(QLabel("С:"))
+            self.header.addWidget(self.from_date)
+            self.header.addWidget(QLabel("По:"))
+            self.header.addWidget(self.to_date)
+            self.header.addWidget(self.button_filter)
+            self.header.addWidget(self.button_all)
+
+            self.root.addLayout(self.header)
+
+        self.view = QTableView()
+
+        self.btoolbar = QHBoxLayout()
+
+        self.button_add = QPushButton("+ Добавить")
+        self.button_del = QPushButton("- Удалить")
+        self.button_ok = QPushButton("\\_/ Применить")
+        self.button_deny = QPushButton("-- Отменить")
+        self.button_csv = QPushButton("Выгрузить отчёт в CSV")
+
+        self.btoolbar.addWidget(self.button_add)
+        self.btoolbar.addWidget(self.button_del)
+        self.btoolbar.addWidget(self.button_ok)
+        self.btoolbar.addWidget(self.button_deny)
+        self.btoolbar.addWidget(self.button_csv)
+
+        self.root.addWidget(self.view)
+        self.root.addLayout(self.btoolbar)
+
+        self._setup_db()
+
+    def _setup_db(self):
+        self.model = QSqlTableModel(db=self._db)
+        self.model.setTable(self._name)
+        self.model.setEditStrategy(QSqlTableModel.EditStrategy.OnManualSubmit)
+        self.model.select()
+
+        self.view.setModel(self.model)
\ No newline at end of file
diff --git a/src/windows.py b/src/windows.py
new file mode 100644
index 0000000..f168f19
--- /dev/null
+++ b/src/windows.py
@@ -0,0 +1,396 @@
+import csv
+from .db import auth, get_free_numbers, update_number_status
+from .objects import User, SignalCode
+from .utils import TabWidgetCustom
+from PyQt6.QtWidgets import (
+    QWidget,
+    QLineEdit,
+    QPushButton,
+    QGroupBox,
+    QFormLayout,
+    QVBoxLayout,
+    QMessageBox,
+    QTabWidget,
+    QMainWindow,
+    QComboBox,
+    QDateEdit,
+    QTableView
+)
+from PyQt6.QtGui import QStandardItemModel, QStandardItem
+from PyQt6.QtSql import QSqlTableModel
+from PyQt6.QtCore import Qt, pyqtSignal, pyqtSlot, QDate
+
+FIW = 160 # Fixed Input Width
+NO_NUMBERS_CONST = "Нет свободных номеров"
+
+class BaseWindow(QMainWindow):
+    def __init__(self, composer, db, user=None):
+        super().__init__()
+        self._composer = composer
+        self._db = db
+        self._user = user
+        self._define_widgets()
+        self._tune_layouts()
+        self._connect_slots()
+        self._apply_window_settings()
+
+    def _define_widgets(self):
+        pass
+
+    def _tune_layouts(self):
+        pass
+
+    def _connect_slots(self):
+        pass
+
+    def _apply_window_settings(self):
+        pass
+
+class LoginWindow(BaseWindow):
+    login_success = pyqtSignal(User)
+    login_forbidden = pyqtSignal(SignalCode)
+
+    def _define_widgets(self):
+        self.root = QWidget()
+
+        self.auth_form = QGroupBox("Логин")
+        self.auth_form.setAlignment(Qt.AlignmentFlag.AlignHCenter |
+                                    Qt.AlignmentFlag.AlignVCenter)
+
+        self.login_line = QLineEdit()
+        self.login_line.setFixedWidth(FIW)
+
+        self.password_line = QLineEdit()
+        self.password_line.setFixedWidth(FIW)
+        self.password_line.setEchoMode(QLineEdit.EchoMode.Password)
+
+        self.auth_button = QPushButton("Авторизоваться")
+
+    def _tune_layouts(self):
+        self.root_l = QVBoxLayout()
+
+        self.form = QFormLayout()
+        self.form.addRow("Логин:", self.login_line)
+        self.form.addRow("Пароль:", self.password_line)
+
+        self.auth_form.setLayout(self.form)
+
+        self.root_l.addWidget(self.auth_form)
+        self.root_l.addWidget(self.auth_button)
+
+        self.root.setLayout(self.root_l)
+
+        self.setCentralWidget(self.root)
+
+    def _connect_slots(self):
+        self.auth_button.clicked.connect(self._on_auth_button_clicked)
+        self.login_success.connect(self._on_login_success)
+        self.login_forbidden.connect(self._on_login_forbidden)
+
+    def _on_auth_button_clicked(self):
+        login = self.login_line.text()
+        password = self.password_line.text()
+
+        if not login or not password:
+            self.login_forbidden.emit(SignalCode.SIGERR)
+            return
+
+        user = auth(login, password)
+
+        if not user:
+            self.login_forbidden.emit(SignalCode.SIGFALSE)
+            return
+
+        print(f"Login OK: {user.name} {user.rights}")
+
+        self.login_success.emit(user)
+
+    @pyqtSlot(User)
+    def _on_login_success(self, user: User):
+        self._composer.render_request.emit(user)
+
+    @pyqtSlot(SignalCode)
+    def _on_login_forbidden(self, code: SignalCode):
+        match code:
+            case SignalCode.SIGFALSE:
+                QMessageBox().information(self,
+                                          "Предупреждение!",
+                                          "Вы ввели некорректные данные")
+            case SignalCode.SIGERR:
+                QMessageBox().information(self,
+                                          "Ошибка!",
+                                          "Вы ввели неприемлемые данные")
+
+    def _apply_window_settings(self):
+        self.setWindowTitle("Авторизация")
+        self.setFixedSize(260,180)
+
+class AdminWindow(BaseWindow):
+    def _define_widgets(self):
+        self.root = QWidget()
+
+        self.tabs = QTabWidget()
+
+        self.users_tab = TabWidgetCustom("users", self._db)
+        self.guests_tab = TabWidgetCustom("guests", self._db)
+        self.rooms_tab = TabWidgetCustom("rooms", self._db)
+        self.bookings_tab = TabWidgetCustom("bookings", self._db)
+        self.staff_tab = TabWidgetCustom("staff", self._db)
+        self.payments_tab = TabWidgetCustom("payments", self._db)
+
+        self.tabs.addTab(self.users_tab, "Пользователи")
+        self.tabs.addTab(self.guests_tab, "Постояльцы")
+        self.tabs.addTab(self.rooms_tab, "Номера")
+        self.tabs.addTab(self.bookings_tab, "Бронирования")
+        self.tabs.addTab(self.staff_tab, "Персонал")
+        self.tabs.addTab(self.payments_tab, "Платежи")
+
+    def _tune_layouts(self):
+        self.root_l = QVBoxLayout()
+        self.root_l.addWidget(self.tabs)
+        self.root.setLayout(self.root_l)
+        self.setCentralWidget(self.root)
+
+    def _connect_slots(self):
+        for i in range(self.tabs.count()):
+            tab = self.tabs.widget(i)
+
+            try:
+                tab.button_all.clicked.connect(lambda _, t=tab: self._select_all(t))
+                tab.button_filter.clicked.connect(lambda _, t=tab: self._select_filter(t))
+            except Exception as e:
+                pass
+
+            tab.button_add.clicked.connect(lambda _, t=tab: self._add_row(t))
+            tab.button_del.clicked.connect(lambda _, t=tab: self._del_row(t))
+            tab.button_csv.clicked.connect(lambda _, t=tab: self._csv_row(t))
+            tab.button_ok.clicked.connect(lambda _, t=tab: self._apply_changes(t))
+            tab.button_deny.clicked.connect(lambda _, t=tab: self._revert_changes(t))
+
+    def _select_all(self, tab):
+        tab.model.setFilter("")
+        tab.model.select()
+
+    def _select_filter(self, tab):
+        date_from = tab.from_date.date().toString("yyyy-MM-dd")
+        date_to = tab.to_date.date().toString("yyyy-MM-dd")
+
+        if tab._name == "bookings":
+            tab.model.setFilter(f"DATE(checkin) >= \'{date_from}\' AND DATE(checkout) <= \'{date_to}\'")
+            tab.model.select()
+        elif tab._name == "payments":
+            tab.model.setFilter(f"date <= \'{date_from}\' AND date <= \'{date_to}\'")
+            tab.model.select()
+
+    def _add_row(self, tab):
+        row = tab.model.rowCount()
+        tab.model.insertRow(row)
+        tab.view.selectRow(row)
+        tab.view.edit(tab.model.index(row, 0))
+
+    def _del_row(self, tab):
+        idx = tab.view.currentIndex()
+
+        if not idx.isValid():
+            print("Error: Fatal: row index is not valid!")
+            return
+
+        msg = QMessageBox.question(self, "Подтверждение",
+                                   "Вы уверены что хотите удалить выбранную строку ?"
+                                   "Изменения будут необратимы")
+
+        if msg == QMessageBox.StandardButton.Yes:
+            tab.model.removeRow(idx.row())
+            tab.model.submitAll()
+
+    def _apply_changes(self, tab):
+        if not tab.model.isDirty():
+            return
+
+        msg = QMessageBox.question(self, "Подтверждение",
+                                   "Применить изменения ?")
+
+        if msg == QMessageBox.StandardButton.Yes:
+            if not tab.model.submitAll():
+                QMessageBox.critical(self, "Ошибка БД",
+                                     "Не получилось применить изменения,"
+                                     f"\n{tab.model.lastError().text()}")
+                tab.model.revertAll()
+
+    def _revert_changes(self, tab):
+        if not tab.model.isDirty():
+            return
+
+        tab.model.revertAll()
+
+    def _csv_row(self, tab):
+        path = f"{tab._name}.csv"
+
+        with open(path, "w", newline="", encoding="utf-8") as f:
+            writer = csv.writer(f)
+            header = [tab.model.headerData(i, Qt.Orientation.Horizontal) for i in range(tab.model.columnCount())]
+
+            writer.writerow(header)
+
+            for row in range(tab.model.rowCount()):
+                row_data = []
+                for col in range(tab.model.columnCount()):
+                    value = tab.model.data(tab.model.index(row, col))
+
+                    if hasattr(value, "toString"):
+                        value = value.toString()
+
+                    row_data.append(value)
+
+                writer.writerow(row_data)
+
+            QMessageBox.information(self, "Информация",
+                                    "Отчёт был сохранён в корневую директорию приложения")
+
+    def _apply_window_settings(self):
+        self.setWindowTitle("Панель Администратора")
+        self.setFixedSize(1200,800)
+
+class ClientWindow(BaseWindow):
+    def _define_widgets(self):
+        self.root = QTabWidget()
+
+        self._define_request_box()
+        self._define_free_rooms()
+        self._define_client_bookings()
+
+    def _tune_layouts(self):
+        self.root_l = QVBoxLayout()
+
+        self._tune_request_box()
+        self._tune_free_rooms()
+        self._tune_client_bookings()
+
+        self.root.addTab(self.rb_widget, "Окно заявки")
+        self.root.addTab(self.fr_widget, "Свободные номера")
+        self.root.addTab(self.cl_widget, "Ваши заявки")
+
+        self.root.setLayout(self.root_l)
+
+        self.setCentralWidget(self.root)
+
+    def _define_request_box(self):
+        self.rb_widget = QWidget()
+        self.req_box = QGroupBox("Создание заявки")
+        self.req_box.setAlignment(Qt.AlignmentFlag.AlignVCenter |
+                                  Qt.AlignmentFlag.AlignHCenter)
+
+        self.room_combo = QComboBox()
+
+        free_rooms = get_free_numbers()
+
+        if free_rooms:
+            for room in free_rooms:
+                number = room[1]
+                self.room_combo.addItem(str(number))
+        else:
+            self.room_combo.addItem(NO_NUMBERS_CONST)
+
+        self.checkin = QDateEdit()
+        self.checkin.setCalendarPopup(True)
+
+        self.checkout = QDateEdit()
+        self.checkout.setCalendarPopup(True)
+
+        self.book_button = QPushButton("Забронировать")
+
+    def _tune_request_box(self):
+        self.req_l = QVBoxLayout()
+        self.form_l = QFormLayout()
+
+        self.form_l.addRow("Комната:", self.room_combo)
+        self.form_l.addRow("Заезд:", self.checkin)
+        self.form_l.addRow("Выезд:", self.checkout)
+
+        self.req_box.setLayout(self.form_l)
+
+        self.req_l.addWidget(self.req_box)
+        self.req_l.addWidget(self.book_button)
+
+        self.rb_widget.setLayout(self.req_l)
+
+    def _define_free_rooms(self):
+        self.fr_widget = QWidget()
+        self.fr_table = QTableView()
+
+        free_rooms = get_free_numbers()
+
+        self.fr_model = QStandardItemModel()
+        self.fr_model.setHorizontalHeaderLabels(["Номер Комнаты"])
+
+        if free_rooms:
+            for room in free_rooms:
+                item = room[1]
+                self.fr_model.appendRow(QStandardItem(str(item)))
+
+        self.fr_table.setModel(self.fr_model)
+
+    def _tune_free_rooms(self):
+        self.f_rooms_l = QVBoxLayout()
+        self.f_rooms_l.addWidget(self.fr_table)
+
+        self.fr_widget.setLayout(self.f_rooms_l)
+
+    def _define_client_bookings(self):
+        self.cl_widget = QWidget()
+        self.cl_table = QTableView()
+
+        self.cl_model = QSqlTableModel(db=self._db)
+        self.cl_model.setTable("bookings")
+        self.cl_model.select()
+
+        self.cl_table.setModel(self.cl_model)
+
+    def _tune_client_bookings(self):
+        self.c_bookings_l = QVBoxLayout()
+        self.c_bookings_l.addWidget(self.cl_table)
+
+        self.cl_widget.setLayout(self.c_bookings_l)
+
+    def _connect_slots(self):
+        self.book_button.clicked.connect(self._book_button_handler)
+
+    def _book_button_handler(self):
+        room = self.room_combo.currentText()
+        checkin = self.checkin.date().toString("yyyy-MM-dd")
+        checkout = self.checkout.date().toString("yyyy-MM-dd")
+
+        if room == NO_NUMBERS_CONST:
+            QMessageBox.information(self, "Информация",
+                                    "На данный момент у нас нет свободных номеров,"
+                                    "приносим свои извинения за доставленные неудобства")
+            return
+
+        if not checkin or not checkout:
+            QMessageBox.critical(self, "Информация",
+                                    "Пожалуйста, введите корректную дату прибытия и отбытия")
+            return
+
+        current_date = QDate.currentDate()
+
+        if self.checkin.date() < current_date or self.checkout.date() < current_date:
+            QMessageBox.critical(self, "Предупреждение",
+                                 "Вы не можете выбрать прошедшую дату!")
+            return
+
+        status = update_number_status(room, checkin, checkout, self._user)
+
+        if not status:
+            QMessageBox.critical(self, "Ошибка!",
+                                 "Не получилось забронировать ваш номер, попробуйте позже")
+            return
+        else:
+            QMessageBox.information(self, "Успешно!",
+                                    f"Вы забронировали номер {room} на даты"
+                                    f"\nС {checkin} по {checkout}, будем рады вас видеть!")
+
+        self.cl_model.select()
+
+    def _apply_window_settings(self):
+        self.setWindowTitle("Панель Пользователя")
+        self.setFixedSize(800,400)
\ No newline at end of file