chore: move backend to separate dir

backend/db.py

@@ -0,0 +1,58 @@
+from dto import Device, SimCard, SmsMessage, QueuedSmsMessage
+
+
+def get_all_devices(cur) -> list[Device]:
+    res = cur.execute("SELECT access_key, type, name FROM devices")
+    devices_from_db = res.fetchall()
+
+    devices = []
+    for item in devices_from_db:
+        devices.append(Device.convert(item))
+    return devices
+
+
+def get_sim_cards_by_device(cur, access_key: str) -> list[SimCard]:
+    if access_key is None or not access_key:
+        return []
+
+    sim_cards_from_db = cur.execute("SELECT phone_number, device_access_key FROM sim_cards WHERE device_access_key = ?", (access_key,)).fetchall()
+    sim_cards = []
+    for item in sim_cards_from_db:
+        sim_cards.append(SimCard.convert(item))
+    return sim_cards
+
+
+def get_sms_messages_by_local_phone_number(cur, local_phone_number: str) -> list[SmsMessage]:
+    if local_phone_number is None or not local_phone_number:
+        return []
+
+    msgs_from_db = cur.execute("SELECT * FROM messages WHERE local_phone_number = ?", (local_phone_number,)).fetchall()
+    msgs = []
+    for item in msgs_from_db:
+        msgs.append(SmsMessage.convert(item))
+    return msgs
+
+
+def send_sms_message(cur, content: str, sender_access_key: str, local_phone_number: str, remote_phone_number: str) -> bool:
+    if content is None or not content \
+            or sender_access_key is None or not sender_access_key \
+            or local_phone_number is None or not local_phone_number \
+            or remote_phone_number is None or not remote_phone_number:
+        return False
+
+    cur.execute("INSERT INTO message_queue VALUES (?, ?, ?, ?)", \
+            (content, sender_access_key, local_phone_number, remote_phone_number))
+    cur.commit()
+    return True
+
+
+def get_queued_sms_messages(cur, local_phone_number) -> list[QueuedSmsMessage]:
+    if local_phone_number is None or not local_phone_number:
+        return []
+
+    msgs_from_db = cur.execute("DELETE FROM message_queue WHERE local_phone_number = ? RETURNING *", (local_phone_number,)).fetchall()
+    cur.commit()
+    msgs = []
+    for item in msgs_from_db:
+        msgs.append(QueuedSmsMessage.convert(item))
+    return msgs