Добавлены каркас приложения, база данных, счета, категории и операции

app/database.py

@@ -0,0 +1,81 @@
+import sqlite3
+from typing import Iterable
+from app.config import DB_NAME
+
+def get_connection() -> sqlite3.Connection:
+    connection = sqlite3.connect(DB_NAME)
+    connection.row_factory = sqlite3.Row
+    connection.execute("PRAGMA foreign_keys = ON")
+    return connection
+
+DEFAULT_CATEGORIES: Iterable[tuple[str, str]] = [
+    ("Продукты", "Расход"),
+    ("Транспорт", "Расход"),
+    ("Кафе", "Расход"),
+    ("Жильё", "Расход"),
+    ("Здоровье", "Расход"),
+    ("Развлечения", "Расход"),
+    ("Одежда", "Расход"),
+    ("Образование", "Расход"),
+    ("Зарплата", "Доход"),
+    ("Фриланс", "Доход"),
+    ("Подарки", "Доход"),
+    ("Возврат", "Доход"),
+]
+
+def init_database() -> None:
+    with get_connection() as connection:
+        cursor = connection.cursor()
+        cursor.executescript(
+            """
+            CREATE TABLE IF NOT EXISTS accounts (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                name TEXT NOT NULL,
+                account_type TEXT NOT NULL,
+                balance REAL NOT NULL DEFAULT 0
+            );
+
+            CREATE TABLE IF NOT EXISTS categories (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                name TEXT NOT NULL,
+                category_type TEXT NOT NULL,
+                UNIQUE(name, category_type)
+            );
+
+            CREATE TABLE IF NOT EXISTS transactions (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                title TEXT NOT NULL,
+                amount REAL NOT NULL,
+                transaction_type TEXT NOT NULL,
+                account_id INTEGER NOT NULL,
+                category_id INTEGER NOT NULL,
+                created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                FOREIGN KEY (account_id) REFERENCES accounts(id) ON DELETE RESTRICT,
+                FOREIGN KEY (category_id) REFERENCES categories(id) ON DELETE RESTRICT
+            );
+
+            CREATE TABLE IF NOT EXISTS subscriptions (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                name TEXT NOT NULL,
+                amount REAL NOT NULL,
+                billing_day INTEGER NOT NULL,
+                period TEXT NOT NULL,
+                status TEXT NOT NULL DEFAULT 'Активна'
+            );
+
+            CREATE TABLE IF NOT EXISTS budgets (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                category_id INTEGER NOT NULL UNIQUE,
+                limit_amount REAL NOT NULL,
+                FOREIGN KEY (category_id) REFERENCES categories(id) ON DELETE RESTRICT
+            );
+            """
+        )
+        cursor.executemany(
+            """
+            INSERT OR IGNORE INTO categories (name, category_type)
+            VALUES (?, ?)
+            """,
+            DEFAULT_CATEGORIES,
+        )
+        connection.commit()