[add]: Database connection and migrations

app/models/__init__.py

@@ -0,0 +1,6 @@
+from .customer import Customer
+from .account import Account
+from .loan import Loan
+from .transaction import Transaction
+
+__all__ = ['Customer', 'Account', 'Loan', 'Transaction']

app/models/account.py

@@ -0,0 +1,15 @@
+from datetime import datetime
+from app import db
+
+class Account(db.Model):
+    id = db.Column(db.String(50), primary_key=True)  
+    customer_id = db.Column(db.String(50), db.ForeignKey('customer.id'), 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.utcnow)
+    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+
+    def __repr__(self):
+        return f'<Account {self.id}>'
+    

app/models/customer.py

@@ -0,0 +1,12 @@
+from datetime import datetime
+from app import db
+
+class Customer(db.Model):
+    id = db.Column(db.String(50), primary_key=True) 
+    msisdn = db.Column(db.String(20), unique=True, nullable=False)
+    country_code = db.Column(db.String(3), nullable=False)
+    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+
+    def __repr__(self):
+        return f'<Customer {self.id}>'

app/models/loan.py

@@ -0,0 +1,16 @@
+from datetime import datetime
+from app import db
+
+
+class Loan(db.Model):
+    id = db.Column(db.String(50), primary_key=True) 
+    customer_id = db.Column(db.String(50), db.ForeignKey('customer.id'), nullable=False)
+    account_id = db.Column(db.String(50), db.ForeignKey('account.id'), nullable=False)
+    product_id = db.Column(db.String(20), nullable=False)
+    principal_amount = db.Column(db.Float, nullable=False)
+    status = db.Column(db.String(20), default='pending')
+    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+
+    def __repr__(self):
+        return f'<Loan {self.id}>'

app/models/offer.py

@@ -0,0 +1,12 @@
+from datetime import datetime
+from app import db
+
+class Offer(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    amount = db.Column(db.Float, nullable=False)
+    interest_rate = db.Column(db.Float, nullable=False)
+    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+
+    def __repr__(self):
+        return f'<LoanOffer {self.id}>'

app/models/transaction.py

@@ -0,0 +1,14 @@
+from datetime import datetime
+from app import db
+
+class Transaction(db.Model):
+    id = db.Column(db.String(50), primary_key=True)
+    account_id = db.Column(db.String(50), db.ForeignKey('account.id'), nullable=False)
+    type = db.Column(db.String(50), nullable=False)
+    amount = db.Column(db.Float, nullable=False)
+    status = db.Column(db.String(20), default='pending')
+    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+
+    def __repr__(self):
+        return f'<Transaction {self.id}>'