update

app/models/account.py

@@ -0,0 +1,49 @@
+from datetime import datetime, timezone
+from sqlalchemy.orm import relationship
+from app.extensions import db
+from sqlalchemy.exc import IntegrityError
+
+class Account(db.Model):
+    __tablename__ = 'accounts'
+
+    id = db.Column(db.String(50), primary_key=True)  
+    customer_id = db.Column(db.String(50), nullable=False)
+    account_type = db.Column(db.String(50))
+    status = db.Column(db.String(20), default='active')
+    lien_amount = db.Column(db.Float, default=0.0)
+    created_at = db.Column(db.DateTime, default=datetime.now(timezone.utc))
+    updated_at = db.Column(db.DateTime, default=datetime.now(timezone.utc), onupdate=datetime.now(timezone.utc))
+
+    customer = relationship(
+        "Customer",
+        primaryjoin="Customer.id == Account.customer_id",
+        foreign_keys=[customer_id],
+        back_populates="accounts",
+    )
+
+    @classmethod
+    def create_account(cls, id, customer_id, account_type, status='active'):
+        account = cls(
+            id=id,
+            customer_id=customer_id,
+            account_type=account_type
+        )
+
+        try:
+            db.session.add(account)
+        except IntegrityError as err:
+            raise ValueError(f"Database integrity error: {err}")
+        return account
+
+    @classmethod
+    def is_valid_account(cls, account_id, customer_id):
+        account = cls.query.filter_by(id=account_id, customer_id=customer_id).first()
+        if not account:
+            return False
+        if account.lien_amount > 0:
+            return False
+        return True
+
+    def __repr__(self):
+        return f'<Account {self.id}>'
+    

app/models/offer.py

@@ -0,0 +1,16 @@
+from datetime import datetime, timezone
+from app.extensions import db
+
+class Offer(db.Model):
+    __tablename__ = 'offers'
+
+    id = db.Column(db.Integer, primary_key=True)
+    product_id = db.Column(db.String, nullable=False)
+    min_amount = db.Column(db.Float, nullable=False)
+    max_amount = db.Column(db.Float, nullable=False)
+    tenor = db.Column(db.Integer, nullable=False)
+    created_at = db.Column(db.DateTime, default=datetime.now(timezone.utc))
+    updated_at = db.Column(db.DateTime, default=datetime.now(timezone.utc), onupdate=datetime.now(timezone.utc))
+
+    def __repr__(self):
+        return f'<LoanOffer {self.id}>'

app/models/repayment.py

@@ -0,0 +1,53 @@
+from datetime import datetime, timezone
+from app.api.enums.loan_status import LoanStatus
+from app.extensions import db
+from app.models.customer import Customer
+from app.models.loan import Loan
+from sqlalchemy.exc import IntegrityError
+
+
+class Repayment(db.Model):
+    __tablename__ = 'repayments'
+
+    id = db.Column(
+        db.Integer,
+        primary_key=True,
+        autoincrement=True,
+    )
+    loan_id = db.Column(db.String(50), nullable=False)
+    customer_id = db.Column(db.String(50), nullable=False)
+    product_id = db.Column(db.String(20), nullable=True)
+    created_at = db.Column(db.DateTime, default=datetime.now(timezone.utc))
+    updated_at = db.Column(db.DateTime, default=datetime.now(timezone.utc), onupdate=datetime.now(timezone.utc))
+
+    @classmethod
+    def create_repayment(cls, customer_id, loan_id, product_id):
+
+
+        # Check customer exists
+        if not Customer.is_valid_customer(customer_id):
+            raise ValueError("Invalid customer")
+
+        # Check loan exists
+        loan = Loan.get_customer_loan(loan_id = loan_id, customer_id = customer_id)
+        
+        # Check that the loan is active
+        if loan.status != LoanStatus.ACTIVE:
+            raise ValueError(f"Repayment cannot be processed. Loan status: ({loan.status})")
+        
+
+        repayment = cls(
+            customer_id=customer_id,
+            loan_id=loan_id,
+            product_id=product_id,
+        )
+
+        try:
+            db.session.add(repayment)
+        except IntegrityError as err:
+            raise ValueError(f"Database integrity error: {err}")
+
+        return repayment
+
+    def __repr__(self):
+        return f'<Repayment {self.id}>'