init database object

.gitignore

@@ -3,3 +3,6 @@
 
 # Python
 /.venv
+
+# Database
+users_subscribes.db

database_interaction.py

@@ -0,0 +1,36 @@
+import sqlite3
+class Database():
+    __instance = None
+
+    def __new__(cls, *args, **kwargs):
+        if cls.__instance is None:
+            cls.__instance = super().__new__(cls)
+
+        return cls.__instance    
+
+    def __init__(self):
+        self.conn = sqlite3.connect('users_subscribes.db')
+        self.cur = self.conn.cursor()
+        self.cur.execute('CREATE TABLE users (id INTEGER, telegram_id NUMERIC, PRIMARY KEY(id))')
+        self.cur.execute('CREATE TABLE feeds (id INTEGER, link TEXT, PRIMARY KEY(id))')
+        self.cur.execute('CREATE TABLE subscribes (user_id INTEGER, feed_id INTEGER, FOREIGN KEY(user_id) REFERENCES users(id), FOREIGN KEY(feed_id) REFERENCES feeds(id))')
+        self.cur.execute('CREATE TABLE feeds_last_items (feed_id INTEGER, link TEXT, title TEXT, description TEXT, date NUMERIC, FOREIGN KEY(feed_id) REFERENCES feeds(id))')    
+
+    def add_rss_feed():
+        pass
+    
+    def delete_rss_feed():
+        pass
+
+    def get_feeds():
+        pass
+
+    def get_users_subscribes():
+        pass
+
+    def get_feed_items():
+        pass
+
+    def storing_feed_content():
+        pass
+