done uea

project.py

@@ -0,0 +1,140 @@
+import psycopg2
+
+class Database:
+    def __init__(self):
+        self.db_params = {
+            "dbname": "postgres",
+            "user": "myuser",
+            "password": "qwerty",
+            "host": "localhost"
+        }
+
+    def connect(self):
+        return psycopg2.connect(**self.db_params)
+
+    def close(self, conn, cur):
+        if cur:
+            cur.close()
+        if conn:
+            conn.close()
+
+class ServiceDepartment:
+    def __init__(self, departmentID, departmentName, database):
+        self.departmentID = departmentID
+        self.departmentName = departmentName
+        self.database = database
+        
+    def addToDatabase(self):
+        conn = None
+        cur = None
+        try:
+            conn = self.database.connect()
+            cur = conn.cursor()
+            cur.execute("INSERT INTO service_department (department_id, name) VALUES (%s, %s)", (self.departmentID, self.departmentName))
+            conn.commit()
+        finally:
+            self.database.close(conn, cur)
+
+    def handleInquires(self, application):
+        conn = None
+        cur = None
+        try:
+            conn = self.database.connect()
+            cur = conn.cursor()
+            cur.execute("UPDATE loan_applications SET status = %s WHERE application_id = %s", ('processed', application.applicationID))
+            conn.commit()
+        finally:
+            self.database.close(conn, cur)
+
+class LoanOfficer:
+    def __init__(self, officerID, name, database):
+        self.officerID = officerID
+        self.name = name
+        self.database = database
+
+    def addToDatabase(self):
+        conn = None
+        cur = None
+        try:
+            conn = self.database.connect()
+            cur = conn.cursor()
+            cur.execute("INSERT INTO loan_officer (officer_id, name) VALUES (%s, %s)", (self.officerID, self.name))
+            conn.commit()
+        finally:
+            self.database.close(conn, cur)
+    
+    def processLoanApplication(self, application):
+        conn = None
+        cur = None
+        try:
+            conn = self.database.connect()
+            cur = conn.cursor()
+            if (application.loanAmount <= 50000):
+                cur.execute("UPDATE loan_applications SET status = %s WHERE application_id = %s", ('approved', application.applicationID))
+            else:
+                cur.execute("UPDATE loan_applications SET status = %s WHERE application_id = %s", ('rejected', application.applicationID))  
+            conn.commit()
+        finally:
+            self.database.close(conn, cur)
+
+class Client:
+    def __init__(self, clientID, name, email, database):
+        self.clientID = clientID
+        self.name = name
+        self.email = email
+        self.database = database
+
+    def submitApplication(self):
+        conn = None
+        cur = None
+        try:
+            conn = self.database.connect()
+            cur = conn.cursor()
+            cur.execute("INSERT INTO client (client_id, name, email) VALUES (%s, %s, %s)", (self.clientID, self.name, self.email))
+            conn.commit()
+        finally:
+            self.database.close(conn, cur)
+
+class LoanApplication:
+    def __init__(self, applicationID, client, loanAmount, status, database):
+        self.applicationID = applicationID
+        self.client = client
+        self.loanAmount = loanAmount
+        self.status = status
+        self.database = database
+        
+    def addToDatabase(self):
+        conn = None
+        cur = None
+        try:
+            conn = self.database.connect()
+            cur = conn.cursor()
+            cur.execute("INSERT INTO loan_applications (client_id, loan_amount, status) VALUES (%s, %s, %s)", (self.client.clientID, self.loanAmount, self.status))
+            conn.commit()
+        finally:
+            self.database.close(conn, cur)
+            
+ 
+# Создание объектов
+database = Database()
+
+my_client = Client(clientID=1, name='Alice Smith', email='alice@example.com', database=database)
+my_client.submitApplication()
+
+# Подача заявки на кредит
+application = LoanApplication(applicationID=1, client=my_client, loanAmount=20000.00, status='waiting', database=database)
+application.addToDatabase()
+ 
+# Создание объектов
+service_dept = ServiceDepartment(departmentID=1, departmentName='Customer Service', database=database)
+service_dept.addToDatabase()
+
+# Обработка заявки на кредит
+service_dept.handleInquires(application)
+
+# Создание объектов
+loan_officer = LoanOfficer(officerID=1, name='John Doe', database=database)
+loan_officer.addToDatabase()
+
+# Вынесение решения по заявке на кредит
+loan_officer.processLoanApplication(application)