main.c

#include <stdio.h>
#include <time.h>
#include <string.h>
#define MAX_YR  2050
#define MIN_YR  1950
#define MAX_SIZE_USER_NAME 20
#define MAX_SIZE_PASSWORD  20
#define FILE_NAME  "A7 Lib.bin"
#define MAX_BOOK_NAME   50
#define MAX_AUTHOR_NAME 50
#define MAX_STUDENT_NAME 50
#define FILE_HEADER_SIZE  sizeof(sFileHeader)
//structure to store date
typedef struct
{
    int yyyy;
    int mm;
    int dd;
} Date;
typedef struct
{
    char username[MAX_SIZE_USER_NAME];
    char password[MAX_SIZE_PASSWORD];
} sFileHeader;
typedef struct// to call in program
{
    int books_id; // declare the integer data type
    char bookName[MAX_BOOK_NAME];// declare the character data type
    char authorName[MAX_AUTHOR_NAME];// declare the character data type
    char studentName[MAX_STUDENT_NAME];// declare the character data type
    Date bookIssueDate;// declare the integer data type
} s_BooksInfo;
void printMessageCenter(char* message)
{
    //print message
    printf("\t\t\t\t\t\t\t%s",message);
}
void headMessage(char *message)
{
    system("cls");
    printf("\t\t\t###########################################################################");
    printf("\n\t\t\t############                                                   ############");
    printf("\n\t\t\t############             LIBARARY MANAGMENT SYSTEM             ############");
    printf("\n\t\t\t############                                                   ############");
    printf("\n\t\t\t###########################################################################");
    printf("\n\t\t\t---------------------------------------------------------------------------\n");
    printMessageCenter(message);
    printf("\n\t\t\t----------------------------------------------------------------------------");
}

int isNameValid(char *name)
{
    int validName = 1;
    int len = 0;
    int index = 0;
    len = strlen(name);
    for(index =0; index <len ; ++index)
    {
        if(!(isalpha(name[index])) && (name[index] != '\n') && (name[index] != ' '))
        {
            validName = 0;
            break;
        }
    }
    return validName;
}
// Function to check leap year.
//Function returns 1 if leap year
int  IsLeapYear(int year)
{
    return (year % 4 == 0);
}
// returns 1 if given date is valid.
int isValidDate(Date *validDate)
{
    //check range of year,month and day
    if (validDate->yyyy > MAX_YR || validDate->yyyy < MIN_YR)
        return 0;
    if (validDate->mm < 1 || validDate->mm > 12)
        return 0;
    if (validDate->dd < 1 || validDate->dd > 31)
        return 0;
    //Handle feb days in leap year
    if (validDate->mm == 2)
    {
        if (IsLeapYear(validDate->yyyy))
            return (validDate->dd <= 29);
        else
            return (validDate->dd <= 28);
    }
    //handle months which has only 30 days
    if (validDate->mm == 4 || validDate->mm == 6 ||
            validDate->mm == 9 || validDate->mm == 11)
        return (validDate->dd <= 30);
    return 1;
}
// Add books in list
void addBookInDataBase()
{
    int days;
    s_BooksInfo addBookInfoInDataBase = {0};
    FILE *fp = NULL;
    int status = 0;
    fp = fopen(FILE_NAME,"ab+");
    if(fp == NULL)
    {
        printf("File is not opened\n");
        exit(1);
    }
    headMessage("ADD NEW BOOKS");
    printf("\n\n\t\t\tENTER YOUR DETAILS BELOW:");
    printf("\n\t\t\t---------------------------------------------------------------------------\n");
    printf("\n\t\t\tBook ID NO  = ");
    fflush(stdin);
    scanf("%d",&addBookInfoInDataBase.books_id);
    do
    {
        printf("\n\t\t\tBook Name  = ");
        fflush(stdin);
        fgets(addBookInfoInDataBase.bookName,MAX_BOOK_NAME,stdin);
        status = isNameValid(addBookInfoInDataBase.bookName);
        if (!status)
        {
            printf("\n\t\t\tName contain invalid character. Please enter again.");
        }
    }
    while(!status);
    do
    {
        printf("\n\t\t\tAuthor Name  = ");
        fflush(stdin);
        fgets(addBookInfoInDataBase.authorName,MAX_AUTHOR_NAME,stdin);
        status = isNameValid(addBookInfoInDataBase.authorName);
        if (!status)
        {
            printf("\n\t\t\tName contain invalid character. Please enter again.");
        }
    }
    while(!status);
    do
    {
        printf("\n\t\t\tStudent Name  = ");
        fflush(stdin);
        fgets(addBookInfoInDataBase.studentName,MAX_STUDENT_NAME,stdin);
        status = isNameValid(addBookInfoInDataBase.studentName);
        if (!status)
        {
            printf("\n\t\t\tName contain invalid character. Please enter again.");
        }
    }
    while(!status);
    do
    {
        //get date year,month and day from user
        printf("\n\t\t\tEnter date in format (day/month/year): ");
        scanf("%d/%d/%d",&addBookInfoInDataBase.bookIssueDate.dd,&addBookInfoInDataBase.bookIssueDate.mm,
              &addBookInfoInDataBase.bookIssueDate.yyyy);
        //check date validity
        status = isValidDate(&addBookInfoInDataBase.bookIssueDate);
        if (!status)
        {
            printf("\n\t\t\tPlease enter a valid date.\n");
        }
    }
    while(!status);
    fwrite(&addBookInfoInDataBase,sizeof(addBookInfoInDataBase), 1, fp);
    fclose(fp);
}
// search books
void searchBooks()
{
    int found = 0;
    char bookName[MAX_BOOK_NAME] = {0};
    s_BooksInfo addBookInfoInDataBase = {0};
    FILE *fp = NULL;
    int status = 0;
    fp = fopen(FILE_NAME,"rb");
    if(fp == NULL)
    {
        printf("\n\t\t\tFile is not opened\n");
        exit(1);
    }
    headMessage("SEARCH BOOKS");
    //put the control on books detail
    if (fseek(fp,FILE_HEADER_SIZE,SEEK_SET) != 0)
{
        fclose(fp);
        printf("\n\t\t\tFacing issue while reading file\n");
        exit(1);
    }
    printf("\n\n\t\t\tEnter Book Name to search:");
    fflush(stdin);
    fgets(bookName,MAX_BOOK_NAME,stdin);
    while (fread (&addBookInfoInDataBase, sizeof(addBookInfoInDataBase), 1, fp))
    {
        if(!strcmp(addBookInfoInDataBase.bookName, bookName))
        {
            found = 1;
            break;
        }
    }
    if(found)
    {
        printf("\n\t\t\tBook id = %d\n",addBookInfoInDataBase.books_id);
        printf("\t\t\tBook name = %s",addBookInfoInDataBase.bookName);
        printf("\t\t\tBook authorName = %s",addBookInfoInDataBase.authorName);
        printf("\t\t\tStudent Name = %s",addBookInfoInDataBase.studentName);
        printf("\t\t\tBook issue date(day/month/year) =  (%d/%d/%d)",addBookInfoInDataBase.bookIssueDate.dd,
               addBookInfoInDataBase.bookIssueDate.mm, addBookInfoInDataBase.bookIssueDate.yyyy);
    }
    else{
        printf("\n\t\t\tNo Record");
    }
    fclose(fp);
    printf("\n\n\n\t\t\tPress any key to go to main menu.....");
    getch();
}
// v books function
void viewBooks(){
    int found = 0;
    char bookName[MAX_BOOK_NAME] = {0};
    s_BooksInfo addBookInfoInDataBase = {0};
    FILE *fp = NULL;
    int status = 0;
    int countBook = 1;
    headMessage("VIEW BOOKS DETAILS");
    fp = fopen(FILE_NAME,"rb");
    if(fp == NULL)
    {
        printf("\n\n\n\t\t\t\t\t\t\tFile is not opened\n\n\n");
        exit(1);
    }
    if (fseek(fp,FILE_HEADER_SIZE,SEEK_SET) != 0)
    {
        fclose(fp);
        printf("Facing issue while reading file\n");
        exit(1);
    }
    while (fread (&addBookInfoInDataBase, sizeof(addBookInfoInDataBase), 1, fp))
    {
        printf("\n\t\t\tBook Count = %d\n\n",countBook);
        printf("\t\t\tBook id = %d",addBookInfoInDataBase.books_id);
        printf("\n\t\t\tBook name = %s",addBookInfoInDataBase.bookName);
        printf("\t\t\tBook authorName = %s",addBookInfoInDataBase.authorName);
        printf("\t\t\tStudent Name = %s",addBookInfoInDataBase.studentName);
        printf("\t\t\tBook issue date(day/month/year) =  (%d/%d/%d)\n\n",addBookInfoInDataBase.bookIssueDate.dd,
               addBookInfoInDataBase.bookIssueDate.mm, addBookInfoInDataBase.bookIssueDate.yyyy);
        found = 1;
        ++countBook;
    }
    fclose(fp);
    if(!found)
    {
        printf("\n\t\t\tNo Record");
    }
    printf("\n\n\t\t\tPress any key to go to main menu.....");
    fflush(stdin);
    getch();
}
// delete function
void deleteBooks()
{
    int found = 0;
    int bookDelete = 0;
    sFileHeader fileHeaderInfo = {0};
    char bookName[MAX_BOOK_NAME] = {0};
    s_BooksInfo addBookInfoInDataBase = {0};
    FILE *fp = NULL;
    FILE *tmpFp = NULL;
    int status = 0;
    headMessage("Delete Books Details");
    fp = fopen(FILE_NAME,"rb");
    if(fp == NULL)
    {
        printf("\n\n\n\t\t\t\t\t\t\tFile is not opened\n\n\n");
        exit(1);
    }
    tmpFp = fopen("tmp.bin","wb");
    if(tmpFp == NULL)
    {
        fclose(fp);
        printf("\n\n\n\t\t\t\t\t\t\tFile is not opened\n\n\n");
        exit(1);
    }
    fread (&fileHeaderInfo,FILE_HEADER_SIZE, 1, fp);
    fwrite(&fileHeaderInfo,FILE_HEADER_SIZE, 1, tmpFp);
    printf("\n\t\t\tEnter Book ID NO. for delete:");
    scanf("%d",&bookDelete);
    while (fread (&addBookInfoInDataBase, sizeof(addBookInfoInDataBase), 1, fp))
    {
        if(addBookInfoInDataBase.books_id != bookDelete)
        {
            fwrite(&addBookInfoInDataBase,sizeof(addBookInfoInDataBase), 1, tmpFp);
        }
        else
        {
            found = 1;
        }
    }
    (found)? printf("\n\t\t\tRecord deleted successfully....."):printf("\n\t\t\tRecord not found");
    getch();
    fclose(fp);
    fclose(tmpFp);
    remove(FILE_NAME);
    rename("tmp.bin",FILE_NAME);
}
void updateCredential()
{
    sFileHeader fileHeaderInfo = {0};
    FILE *fp = NULL;
    char userName[MAX_SIZE_USER_NAME] = {0};
    char password[MAX_SIZE_PASSWORD] = {0};
    headMessage("Update Credential");
    fp = fopen(FILE_NAME,"rb+");
    if(fp == NULL)
    {
        printf("File is not opened\n");
        exit(1);
    }
    printf("\n\n\t\t\tNew Username:");
    fflush(stdin);
    fgets(userName,MAX_SIZE_USER_NAME,stdin);
    printf("\n\n\t\t\tNew Password:");
    fflush(stdin);
    fgets(password,MAX_SIZE_PASSWORD,stdin);
    strncpy(fileHeaderInfo.username,userName,sizeof(userName));
    strncpy(fileHeaderInfo.password,password,sizeof(password));
    fwrite(&fileHeaderInfo,FILE_HEADER_SIZE, 1, fp);
    fclose(fp);
    printf("\n\t\t\tYour Password has been changed successfully");
    printf("\n\t\t\t\tPress Enter to Login Again:");
    getch();
    login();
}
void about()
{
            headMessage("About");
            printf("\n\n\n\t\t\t\t\t--------------------------------\n");
            printf("\t\t\t\t\t\t   MABE BY \n\n");
            printf("\t\t\t\t\t\tRAKSHIT GUPTA \n");;
            printf("\t\t\t\t\t\t  2021a1r050 \n");;
            printf("\t\t\t\t\t--------------------------------\n\n\n");
            printf("Press Enter to Return to Main Menu.......");
            getch();
            menu();
}
void menu()
{
    int choice = 0;
    do
    {
        headMessage("MAIN MENU");
        printf("\n\n\n\t\t\t1.Add Books");
        printf("\n\t\t\t2.Search Books");
        printf("\n\t\t\t3.View Books");
        printf("\n\t\t\t4.Delete Book");
        printf("\n\t\t\t5.Update Password");
        printf("\n\t\t\t6.About");
        printf("\n\t\t\t7.Exit");
        printf("\n\n\n\t\t\tEnter choice => ");
        scanf("%d",&choice);
        switch(choice)
        {
        case 1:
            addBookInDataBase();
            break;
        case 2:
            searchBooks();
            break;
        case 3:
            viewBooks();
            break;
        case 4:
            deleteBooks();
            break;
        case 5:
            updateCredential();
            break;
        case 6:
            about();
            exit(1);
            break;
        case 7:
            printf("\n\n\n\t\t\t\t| Thank you!!! |\n\n\n\n\n");
            exit(1);
            break;
        default:
            printf("\n\n\n\t\t\tINVALID INPUT!!! Try again...");
        }                                            //Switch Ended
    }
    while(choice!=0);                                        //Loop Ended
}
//login password
void login()
{
    char userName[MAX_SIZE_USER_NAME] = {0};
    char password[MAX_SIZE_PASSWORD] = {0};
    int L=0,j;
    sFileHeader fileHeaderInfo = {0};
    FILE *fp = NULL;
    headMessage("Login");
    fp = fopen(FILE_NAME,"rb");
    if(fp == NULL)
    {
        printf("File is not opened\n");
        exit(1);
    }
    fread (&fileHeaderInfo,FILE_HEADER_SIZE, 1, fp);
    fclose(fp);
    do
    {
        printf("\n\n\n\t\t\t\tUsername:");
        fgets(userName,MAX_SIZE_USER_NAME,stdin);
        printf("\n\t\t\t\tPassword:");
        fgets(password,MAX_SIZE_PASSWORD,stdin);
        if((!strcmp(userName,fileHeaderInfo.username)) && (!strcmp(password,fileHeaderInfo.password)))
        {
            menu();
        }
        else
        {
            printf("\t\t\t\tLogin Failed Enter Again Username & Password\n\n");
            L++;
        }
    }
    while(L<=3);
    if(L>3)
    {
        headMessage("Login Failed");
        printf("\t\t\t\tSorry,Unknown User.");
        getch();
    }
}
int isFileExists(char *path)
{
    // Try to open file
    FILE *fp = fopen(path, "rb");
    int status = 0;
    // If file does not exists
    if (fp != NULL)
    {
        status = 1;
        // File exists hence close file
        fclose(fp);
    }
    return status;
}
void init()
{
    FILE *fp = NULL;
    int status = 0;
    char defaultUsername[] ="a7\n";
    char defaultPassword[] ="a7\n";
    sFileHeader fileHeaderInfo = {0};
    status = isFileExists(FILE_NAME);
    if(!status)
    {
        //create the binary file
        fp = fopen(FILE_NAME,"wb");
        if(fp != NULL)
        {
            //Copy default password
            strncpy(fileHeaderInfo.password,defaultPassword,sizeof(defaultPassword));
            strncpy(fileHeaderInfo.username,defaultUsername,sizeof(defaultUsername));
            fwrite(&fileHeaderInfo,FILE_HEADER_SIZE, 1, fp);
            fclose(fp);
        }
    }
}
int main()
{
    init();
    login();
    return 0;
}