https and ssl integration on the backend, frontend and started integration of logistics app as a separate frontend

backend/app/models.py

@@ -73,13 +73,13 @@ class Dewar(Base):
     shipping_date = Column(Date, nullable=True)
     arrival_date = Column(Date, nullable=True)
     returning_date = Column(Date, nullable=True)
-    unique_id = Column(String(36), default=lambda: str(uuid.uuid4()), unique=True, index=True, nullable=True)
-    qrcode = Column(String, nullable=True)
+    unique_id = Column(String, unique=True, index=True, nullable=True)
     shipment_id = Column(Integer, ForeignKey("shipments.id"))
     return_address_id = Column(Integer, ForeignKey("addresses.id"))
     contact_person_id = Column(Integer, ForeignKey("contact_persons.id"))
 
     shipment = relationship("Shipment", back_populates="dewars")
+    events = relationship("LogisticsEvent", back_populates="dewar")
     return_address = relationship("Address")
     contact_person = relationship("ContactPerson")
     pucks = relationship("Puck", back_populates="dewar")
@@ -132,22 +132,30 @@ class Sample(Base):
     puck_id = Column(Integer, ForeignKey('pucks.id'))
     puck = relationship("Puck", back_populates="samples")
 
+
 class Slot(Base):
     __tablename__ = "slots"
+
     id = Column(String, primary_key=True, index=True)
+    qr_code = Column(String, unique=True, index=True)
+    label = Column(String)
+    qr_base = Column(String, nullable=True)
     occupied = Column(Boolean, default=False)
     needs_refill = Column(Boolean, default=False)
-    time_until_refill = Column(Interval, nullable=True)
     last_refill = Column(DateTime, default=datetime.utcnow)
+    time_until_refill = Column(Integer)  # store as total seconds
 
+    @property
+    def calculate_time_until_refill(self):
+        if self.last_refill and self.time_until_refill:
+            return self.last_refill + self.time_until_refill - datetime.utcnow()
+        return None
 
 class LogisticsEvent(Base):
-    __tablename__ = "logistics_events"
+    __tablename__ = 'logistics_events'
     id = Column(Integer, primary_key=True, index=True, autoincrement=True)
     dewar_id = Column(Integer, ForeignKey('dewars.id'), nullable=False)
-    slot_id = Column(String, ForeignKey('slots.id'), nullable=True)
     event_type = Column(String, nullable=False)
     timestamp = Column(DateTime, default=datetime.utcnow)
 
-    dewar = relationship("Dewar")
-    slot = relationship("Slot")
+    dewar = relationship("Dewar", back_populates="events")