Banking System

A comprehensive system designed to manage fundamental banking functionalities. This project supports three main user types: Clients, Bank Employees, and External Company Employees, each with a unique set of operations and commands.

Table of Contents

• Features
• User Types
  • Client
  • Bank Employee
  • Third Party Employee
• Common Commands
• System Requirements

Features

• Account Management: Open, close, and manage multiple bank accounts.
• Check Redemption: Redeem checks with a secure verification process.
• Inter-bank Transfers: Transfer accounts between different banks.
• Task Management for Employees: Efficiently handle client requests and manage workload.
• Persistent Data Storage: Save and reload data to ensure continuity.

User Types and Commands

Client

Clients can hold multiple accounts in different banks and perform various operations:

• check_avl [bank_name] [account_number] - Displays the balance of the specified account.
• open [bank_name] - Sends a request to open a new account in the specified bank.
• close [bank_name] [account_number] - Sends a request to close the specified account.
• redeem [bank_name] [account_number] [verification_code] - Redeems a check and transfers the amount to the specified account.
• change [new_bank_name] [current_bank_name] [account_number] - Requests to transfer the specified account to another bank.
• list [bank_name] - Lists all accounts the client holds in the specified bank.
• messages - Displays all messages in chronological order.

Bank Employee

Bank employees handle tasks generated by the bank based on client requests:

• tasks - Shows the tasks assigned to the employee.
• view [task_id] - Displays details of the specified task.
• approve [task_id] - Approves and completes the task.
• disapprove [task_id] [message] - Rejects and completes the task, sending a message to the client.
• validate [task_id] - Validates client data for inter-bank transfers.

Third Party Employee

Third-party employees are responsible for issuing checks to bank clients:

• send_check [sum] [verification_code] [egn] - Issues a check to the client with the specified EGN.

Common Commands

All users can use the following commands:

• exit - Logs out of the profile.
• whoami - Displays complete information about the current user.
• help - Shows the help menu with supported commands.

System Requirements

The system must support the following functionalities:

• login - Authenticates a user into the system.
• signup - Registers a new user in the system, allowing registration as any of the three user types.
• create_bank - Creates a new bank in the system. No account is needed to create a bank, but the bank must exist to create a bank employee.

The system should maintain state persistence, saving data upon shutdown and reloading it upon restart. Proper file handling should be used for storing and retrieving data.