Project Description

The DVD rental system Updated!

1. Open a DVD stock file - instructs the system to open a particular stock file.
2. Add a new customer to the rental system -- self explanitory.
3. Add a DVD to a customer's queue of DVDs not yet rented.
4. Return a DVD -- Adds the DVD to the "in-stock" list of DVDs. If possible rents a new DVD to the customer.
5. Print a list of all DVDs -- DVD information is printed for all "in-stock" DVDs
6. Print a list of customers -- Customer information and list of rented DVDs is printed
7. Print the queue for a particular customer

Customers

DVDs

Program Requirements

Class Requirements

You will implement three C++ classes to model the following entities:

• the DVD rental system
• a Customer
• a DVD

Command File Requirements

Your program is required to print the command as read from the command file and then execute it appropriately.

Commands

Valid commands for the system are as follows:

• OPEN <filename>
  Opens a DVD stock file
  <filename> is the absolute or relative path to a stock file
  
  
• CUSTOMER <first name > <last name > <username> <card number>
  <address>
  <city> <state> <zip code>
  Adds a customer to the system. Note that the address is on the SECOND line of the command and the city, state and zip are on the THIRD - obviously, your program won't know that there is a second line or third line until it looks at the first one.
  <first name > and <last name > are words with no spaces and any punctuation is valid
  <username> is a word with no spaces and only letters, digits, and the underscore are permitted
  <card number> is a 16-digit number with no spaces
  <address> a collection of words of printable characters
  <city> a collection of words of printable characters
  <state> one of the 2-letter state abbreviations, no spaces
  <zip code> is a 5-digit number with no spaces, between 01000 and 99999 (CHANGED from Project 1)
  
  
• RETURN <dvd number> <number of discs> <title> <username>
  Updated! Returns the specified DVD for the customer. Adds the DVD to the "in-stock" list. If possible, rents the customer a DVD and prints a receipt. The DVD need not exist in the current system.
  <dvd number> valid as above
  <number of discs> 1-3 digit number with no spaces
  <title> a collection of words of printable characters
  <username> valid as above
  
  
• QUEUE <dvd number> <username>
  Updated! Adds the specified DVD to the customer's queue of DVDs to be rented. If the customer's maximum capacity of rentals is not yet met, the DVD is shipped immediately and a receipt is printed. The DVD need not exist in the current system.
  <dvd number> valid as above
  <username> valid as above
  
  
• PRINT <items>
  Updated! Prints either DVD or Customer data. If DVD: print all the DVD's in-stock. If CUSTOMER: print rental history and customer info (not queue). If username - print the customer's queue. Any DVD information that is unknown can be left blank.
  <items> is "DVD", "CUSTOMER", or an username
  
  

Command File Error Checking

• If the command file cannot be found, the system shall display an error message and exit.
• If the stock file cannot be found, the system shall display an error message and exit.
• If the stock file is empty, command processing shall continue, there are no DVDs available (until someone returns one).
• If a command is incorrect in any way (format or content), it shall be discarded and processing of the command file shall continue. Must include an error message.
• If a command cannot be executed (like queueing a DVD for a non-existant customer), a message shall be printed and processing of the command file shall continue.
• Updated! You must validate all data including numbers. We will not promise that things like the zip code will have 5 characters or that the characters will be digits. We also do not promise that all data will be included on a single line of a command. For example, the username may be left off. You CAN assume that each command will include the appropriate NUMBER of lines (1 for all but CUSTOMER which has 3). Hint: Use getline.
• Names, addresses, and other "word" based items, unless specifically limited - they may contain any printable character.
• Printable characters are defined as any character that can be typed on the keyboard. You need not validate these characters at all.
• Updated! When a customer returns a DVD, the first available DVD on their queue shall be rented to them and removed from their queue. Customers may have a DVD on their queue any number of times. Available DVDs are DVDs that are "in-stock".
• If (from a queue or return command) the customer cannot be rented a DVD, the system shall display an error and continue processing the command file. The next time that customer returns or queues a DVD, their quota shall be filled (again, only if possible).

Sample Command File

Stock File

Stock File Error Checking

NEW! Multiple copies of DVDs are acceptable in the stock file. You may assume that the number of discs and title will be identical for duplicate DVDs - therefore need only store the first copy of that data. Duplicate DVDs will of course have the same DVD Number. If there are multiple copies of a DVD, multiple customers can rent that DVD.

Sample Stock File

General Requirements

• In keeping with course standards, main( ) will be implemented in a file named Proj2.cpp.
• Prototypes for any helper functions called from main will be located in Proj2Aux.h and the functions themselves implemented in Proj2Aux.cpp.
• Each class will be defined in a separate header (e.g. Customer.h) file and implemented in a similarly named .cpp file (e.g. Customer.cpp).
• You must provide a makefile for this project which compiles and links all files when the grader types
  make Proj2.
• Your executable must be named Proj2.

Note that not all of the programming details have been spelled out for you. For example, the rental system must keep track of which DVD is rented by whom, but there's no indication about how that should be done. This is intentional....you are required to give the project design serious thought before writing code. Remember to think ahead to what might be assigned in future projects and design your classes so that they are easily modifiable.

Program Output

1. Customer credit card numbers must be displayed in the form 1234-5678-9012-3456.
2. All monetary values must be displayed with 2 decimal places.
3. When displaying a list of DVDs or customers, data must be aligned in columns.
4. Lists of DVDs/customers shall be displayed in the order DVDs/customers are added to the rental system.
5. As the stock file is processed, messages informing the user of each DVD that is being added shall be displayed

1. The renter's first and last name total no more than 20 characters.
2. The renter's username totals no more than 20 characters.

Sample Output

Free Advice and Information

1. You may find it handy to review the material on string streams for this assignment - they can be particularly handy in ripping apart lengthy commands! You may also consider using them to generalize your command-parsing algorithm - remember, if there were to be 100s of commands, would you want to write a function to handle each one???
2. There are some functions like isalpha() and isdigit() that you might find helpful for this assignment...look them up.
3. Hopefully you figured out in the last assignment that setfill() and setw() can be helpful - you will have need of them again.
4. Carefully consider your class design. In general, a minimal class interface is best. Consider how best to reuse code. Plan for the future reuse of code you write in this project.
5. Functions called from main that are not part of any class are permitted. If you create new functions, their prototypes must be found in Proj2Aux.h and they must be implemented in Proj2Aux.cpp; you must modify the makefile provided to account for these new files.
6. Your program must provide adequate error checking as described above.
7. Think carefully about the proper use of const for parameters and member functions. Doing const correctly from the beginning can save lots of effort and frustration later.
8. Review the class notes on the different methods of passing parameters. Each is best for a different situation.
9. Be sure your function header comments list the pre- and post-conditions and handle each pre-condition that is not met.
10. Your program will be tested with a variety of conditions.
11. Use incremental development. Add ~5 lines, save, compile, test. Use function/method stubs to develop a class incrementally.
12. Expect to use/modify code from this project in project 3. Design and code accordingly.
13. This project is approximately 450 lines of code (many of which can be copied from proj 1), not including file header comments or function header comments.... don't procrastinate.

Project Design Assignment