admin_manager.h

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#ifndef ADMIN_MANAGER_H
#define ADMIN_MANAGER_H
 
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>

#define MAX_USERNAME_LENGTH 20

#define MAX_PASSWORD_LENGTH 20

typedef struct Admin {
    char username[MAX_USERNAME_LENGTH]; 
    char password[MAX_PASSWORD_LENGTH]; 
    struct Admin* next; 
} Admin;

void saveAdminCredentials(void);

void loadAdminCredentials(void);

bool adminExists(const char* username);

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

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

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

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

void displayAdmin(void);

void freeAdmin(void);
 
#endif