chore: move backend to separate dir

backend/dto.py

@@ -0,0 +1,80 @@
+from dataclasses import dataclass
+
+@dataclass
+class Device:
+    access_key: str
+    device_type: str
+    name: str
+
+
+    def to_dict(self):
+        return {
+                'access_key': self.access_key,
+                'type': self.device_type,
+                'name': self.name
+               }
+
+
+    def convert(device_from_db) -> Device:
+        return Device(*device_from_db)
+
+
+@dataclass
+class SimCard:
+    phone_number: str
+    device_access_key: str
+
+
+    def to_dict(self):
+        return {
+                'phone_number': self.phone_number,
+                'device_access_key': self.device_access_key
+               }
+
+
+    def convert(sim_from_db) -> SimCard:
+        return SimCard(*sim_from_db)
+
+
+@dataclass
+class SmsMessage:
+    content: str
+    ts_received: int
+    ts_sent: int
+    msg_type: str
+    local_phone_number: str
+    remote_phone_number: str
+
+    def to_dict(self):
+        return {
+                'content': self.content,
+                'ts_received': self.ts_received,
+                'ts_sent': self.ts_sent,
+                'msg_type': self.msg_type,
+                'local_phone_number': self.local_phone_number,
+                'remote_phone_number': self.remote_phone_number
+               }
+
+
+    def convert(sms_from_db) -> SmsMessage:
+        return SmsMessage(*sms_from_db)
+
+
+@dataclass
+class QueuedSmsMessage:
+    content: str
+    sender_access_key: str
+    local_phone_number: str
+    remote_phone_number: str
+
+    def to_dict(self):
+        return {
+                'content': self.content,
+                'sender_access_key': self.sender_access_key,
+                'local_phone_number': self.local_phone_number,
+                'remote_phone_number': self.remote_phone_number
+               }
+
+
+    def convert(sms_from_db) -> QueuedSmsMessage:
+        return QueuedSmsMessage(*sms_from_db)