set up epc model and already installed model

backend/app/db/models/epc.py

@@ -0,0 +1,29 @@
+from sqlalchemy import (
+    Column,
+    Integer,
+    String,
+    JSON,
+    TIMESTAMP,
+    UniqueConstraint,
+)
+from sqlalchemy.orm import declarative_base
+
+Base = declarative_base()
+
+
+class EpcStore(Base):
+    """
+    Stores EPC data retrieved from the EPC API and EPC web pages.
+    """
+    __tablename__ = "epc_store"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    uprn = Column(Integer)
+    epc_api_created_at = Column(TIMESTAMP(timezone=False))
+    epc_api = Column(JSON, nullable=False)
+    epc_page_created_at = Column(TIMESTAMP(timezone=False))
+    epc_page = Column(String)
+    epc_page_rrn = Column(String)
+
+    def __repr__(self):
+        return f"<EpcStore(id={self.id}, uprn='{self.uprn}')>"

backend/app/db/models/portfolio.py

@@ -4,6 +4,7 @@ import datetime
 from sqlalchemy import Column, Integer, Text, Boolean, Float, DateTime, Enum, ForeignKey, CheckConstraint
 from sqlalchemy.ext.declarative import declarative_base
 from backend.app.db.models.users import UserModel  # noqa
+from backend.app.db.models.materials import MaterialType
 
 Base = declarative_base()
 
@@ -225,3 +226,18 @@ class PortfolioUsers(Base):
     role = Column(Text, nullable=False)
     created_at = Column(DateTime, nullable=False, default=datetime.datetime.now(pytz.utc))
     updated_at = Column(DateTime, nullable=False, default=datetime.datetime.now(pytz.utc))
+
+
+class PropertyInstalledMeasures(Base):
+    """
+    This model keeps a record of the installed measures for each property, at the UPRN level
+    """
+    __tablename__ = 'property_installed_measures'
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    uprn = Column(Integer, nullable=False)
+    measure_type = Column(
+        Enum(MaterialType, values_callable=lambda x: [e.value for e in x], create_constraint=False),
+        nullable=False
+    )
+    created_at = Column(DateTime, nullable=False, default=datetime.datetime.now(pytz.utc))
+    installed_at = Column(DateTime, nullable=False, default=datetime.datetime.now(pytz.utc))