Hotel Manager

This is a hotel manager , implemented in CPP. Some of the available commands and their schemas

Signup

signup <username to be checked >

Login

login <username> <password>

Logout

9

Book Room

book_room <room_id> <bed_count> <start_date> <end_date>

Cancel Room

cancel <room_id> <bed_count>

Build with

make

Clean with

make clean

Run Client with

./Client.exe

Run server with

./Server.exe

810199395 Pouriya Tajmehrabi

810199392 Mohammad Amin Pourzare

Simple Client Server architecture

JSON encoded and serialized data transfer

Request Type determines corresponding server response method instead of url regex matchijng

A Wrapper around UNIX sockets manages the connection with the server and vice versa .

The connector class in the client ------> image1.png

Utility methods contain serialization and dumping , Printing the server response happens on each server receipt.

How the server handles multiple clients, The server handles multiple clients using cpp threads, when the server accepts a client, it creates and stores the designated FDS and uses them for later , Handle-client function is used for this affair

Call back functions

Server.h Gives basic communication utility with the client , deserializes and serializes the messages in between with it’s functions .

Mutex locks are used for maintaining thread safety with the json files that are altered , JSON storage is updated after each insertion, functions that need to be thread safe because of race conditions handle races by acquring mutex locks

JSON utilities enabled with nlohmann library and hand written Date utility for working with dates

Hotel managment logic :

1- Overlap occupations finds out the capacity of each room for a potential reservation

2- Authenticate checks the credential user password for entry

3- Invalid date utility is an interface that recognizes faults

4- update_reserves_with_time() , updates the reserves on each call back execution

5- Is User admin checks if the user is admin

A sample of a call back function that creates response ( each executing thread for the client calls this function )

Outputs :

Run server :

Run client :

successful login :

Login failed :

Logout :

View‬‬ ‫‪user‬‬ ‫‪information :

‫‪‬‬ View‬‬ ‫‪all‬‬ ‫‪users :

View‬‬ ‫‪Rooms‬‬ ‫‪Information :

Leaving‬‬ ‫‪room :

Successful signup :

Error 403 :

Error 503:

Successful ‫‪Booking‬‬ :

Add Room :

Modify Room :

Remove Room :

Edit‬‬ ‫‪information :

Canceling :

Error 451 :

Error 101 :

Error 108 :

Error 111 :

Error 102 :

Error 231 :

Error 109 :

Error 311 :

View Empty room information :

Error 102 (leaving room):