admin_manager.c File Reference

Admin manager source file. More...

#include "../include/admin_manager.h"
#include "../include/misc.h"

Go to the source code of this file.

Functions
saveAdminCredentials
Save admin credentials to file This function saves the linkedlist data from adminHead to the file resources/db/admin_credentials.dat. .dat is used to store credentials in binary format for surface level security. Note The file path 'resources/db' is relative to the project root directory. Make sure that the folder exists also to run the program from the root directory. Postcondition The linkedlist data is saved to the file. Exceptions fopen() - If the file cannot be opened, an error message is displayed. fwrite() - If the file cannot be written, an error message is displayed.
void	saveAdminCredentials (void)
loadAdminCredentials
Load admin credentials from file This function loads the admin credentials from the file resources/db/admin_credentials.dat and stores it in the adminHead linkedlist. If file is not found, it creates a new admin with default credentials and stores it in the file. Note The file path 'resources/db' is relative to the project root directory. Make sure that the folder exists also to run the program from the root directory. Postcondition If the file is not found, a new admin is created with default credentials and stored in the file. If the file is found, the admin credentials are loaded from the file and stored in the adminHead linkedlist. Exceptions fopen() - If the file cannot be opened, an error message is displayed. malloc() - If memory allocation fails, an error message is displayed.
void	loadAdminCredentials (void)
adminExists
Check if admin exists This function traverses the adminHead linkedlist and checks if the username exists in the list. Parameters [in] username Admin username Returns True if admin exists, False otherwise Precondition username is not empty and valid Postcondition If the username is found in the linkedlist, the function returns true, otherwise false. Exceptions If the username is empty, an error message is displayed. If the username is invalid, an error message is displayed.
bool	adminExists (const char *username)
validateAdmin
Validate admin credentials This function traverses the adminHead linkedlist and checks if the pair of username and password match. Parameters [in] username Admin username [in] password Admin password Returns True if credentials are valid, False otherwise Precondition username and password are not empty and valid Postcondition If the pair of username and password are found in the linkedlist, the function returns true, otherwise false. Exceptions If the username or password is empty, an error message is displayed. If the username is invalid, an error message is displayed.
bool	validateAdmin (const char *username, const char *password)
addAdmin
Add admin This function adds a new admin to the adminHead linkedlist and saves the updated linkedlist to the file resources/db/admin_credentials.dat. Parameters [in] username Admin username [in] password Admin password [in] currentAdminUsername Current admin username [in] currentAdminPassword Current admin password Returns True if admin is added, False otherwise Note The file path 'resources/db' is relative to the project root directory. Make sure that the folder exists also to run the program from the root directory. Precondition username and password are not empty currentAdminUsername and currentAdminPassword are not empty username and currentAdminUsername are valid Postcondition If the username and password are not found in the linkedlist, the function adds the new admin to the linkedlist and saves the updated linkedlist to the file. Exceptions If the username or password is empty, an error message is displayed. If the username or currentAdminUsername is invalid, an error message is displayed. If the pair of currentAdminUsername and currentAdminPassword is invalid, means that the current admin credentials are not valid, an error message is displayed. If the username already exists, an error message is displayed. malloc() - If memory allocation fails, an error message is displayed.
bool	addAdmin (const char *username, const char *password, const char *currentAdminUsername, const char *currentAdminPassword)
deleteAdmin
Delete admin This function deletes an admin from the adminHead linkedlist and saves the updated linkedlist. Parameters [in] username Admin username [in] currentAdminUsername Current admin username [in] currentAdminPassword Current admin password Returns True if admin is deleted, False otherwise Precondition username is not empty currentAdminUsername and currentAdminPassword are not empty username and currentAdminUsername are valid Postcondition If the username is found in the linkedlist, the function deletes the admin from the linkedlist and saves the updated linkedlist to the file. Exceptions If the pair of currentAdminUsername and currentAdminPassword is invalid, means that the current admin credentials are not valid, an error message is displayed. If the username does not exist, an error message is displayed. If the username is the same as the current admin username, an error message is displayed. If the username or currentAdminUsername is invalid, an error message is displayed.
bool	deleteAdmin (const char *username, const char *currentAdminUsername, const char *currentAdminPassword)
changeAdminPassword
Change admin password This function changes the password of an admin in the adminHead linkedlist and saves the updated linkedlist. Parameters [in] username Admin username [in] oldPassword Old password [in] newPassword New password Returns True if password is changed, False otherwise Precondition username and oldPassword are not empty username is valid newPassword is not empty Postcondition If the pair of username and oldPassword are found in the linkedlist, the function changes the password of the admin and saves the updated linkedlist. Exceptions If the username or oldPassword is empty, an error message is displayed. If the pair of username and oldPassword is not found in the linkedlist, an error message is displayed. If the username is invalid, an error message is displayed.
bool	changeAdminPassword (const char *username, const char *oldPassword, const char *newPassword)
displayAdmin
Display all admins This function displays all admins in the adminHead linkedlist. Postcondition If the adminHead linkedlist is not empty, the function displays all admins in the linkedlist.
void	displayAdmin (void)
freeAdmin
Free admin list This function frees the memory allocated for the adminHead linkedlist. Postcondition The memory allocated for the adminHead linkedlist is freed.
void	freeAdmin (void)

Variables
Admin *	adminHead = NULL
	Admin head pointer.

Detailed Description

Admin manager source file.

This file contains the implementation of the admin manager module.

Author

CrimsonCare Team

Date

2025-01-18

Copyright

Copyright (c) 2025 CrimsonCare Team

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Definition in file admin_manager.c.

Function Documentation

addAdmin()

bool addAdmin	(	const char *	username,
		const char *	password,
		const char *	currentAdminUsername,
		const char *	currentAdminPassword )

Definition at line 240 of file admin_manager.c.

adminExists()

bool adminExists

(

const char *

username

)

Definition at line 151 of file admin_manager.c.

changeAdminPassword()

bool changeAdminPassword	(	const char *	username,
		const char *	oldPassword,
		const char *	newPassword )

Definition at line 380 of file admin_manager.c.

deleteAdmin()

bool deleteAdmin	(	const char *	username,
		const char *	currentAdminUsername,
		const char *	currentAdminPassword )

Definition at line 306 of file admin_manager.c.

displayAdmin()

void displayAdmin

(

void

)

Definition at line 422 of file admin_manager.c.

freeAdmin()

void freeAdmin

(

void

)

Definition at line 441 of file admin_manager.c.

loadAdminCredentials()

void loadAdminCredentials

(

void

)

Definition at line 96 of file admin_manager.c.

saveAdminCredentials()

void saveAdminCredentials

(

void

)

Definition at line 54 of file admin_manager.c.

validateAdmin()

bool validateAdmin	(	const char *	username,
		const char *	password )

Definition at line 190 of file admin_manager.c.

Variable Documentation

adminHead

Admin* adminHead = NULL

Admin head pointer.

This pointer is used to track admin linkedlist on runtime.

Definition at line 37 of file admin_manager.c.