DataBaseMain.c

#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "Books.h"
#include "Attributes.h"


/*
* @author - Patrick Quinlan
* SID - 575275
* Last Edit - 4/3/24
* 
* Main file where the database application for handling the book database
* of a library. Books can be grouped by:
* topic/genre, name, publication year, author, type, availability
* 
* Likely best implamented as a linked list of linked lists or an array of linked lists so when searching
* for a specific book its easy to enter a narrowing field in an array and then to traverse the list to find
* book
* 
* This would also be benificial for adding new books as adding to a linked list is much easier than adding
* to an array and narrowing topics ect are much more rarely added compared to books. Other Positives is
* searching an array has O(1) as we can go straight to the location as long as we know where it is.
*/

int main(int argc, char* argv)
{
	FILE* data;
	data = fopen("Books.txt","r");
	//book_list_tests(); // hard coded test for the book lists methods
	//attribute_table_test(); //hard coded test for hash table
	String buffer[99];
	String* book_data = malloc(4 * sizeof(buffer));
	String token = malloc((4 * strlen(buffer) + 5) * sizeof(char));
	int year;

	String data_string = malloc((4 * strlen(buffer) + 4) * sizeof(char));
	int i = 0;

	AttributeTable library_database = create_hashtable(552);
	printf("\nFill Database");

	fgets(data_string, strlen(buffer) * 4 + 4, data);
	
	clock_t start = clock();

	//add books
	while (!feof(data))
	{
		i = 0;
		token = strtok(data_string, ":");
		while (token != NULL && i < 4) {
			book_data[i] = malloc((strlen(buffer) + 1) * sizeof(char));
			strcpy(book_data[i], token);
			token = strtok(NULL, ":");
			i++;
		}

		BookNodePtr book = create_book(book_data[0], book_data[1], book_data[2], atoi(book_data[3]));
		insert_book_to_table(&library_database, book);
		free(book);
		fgets(data_string, strlen(buffer) * 4 + 4, data);
	}
	fclose(data);
	clock_t diff = clock() - start;
	long msec = diff * 1000 / CLOCKS_PER_SEC;
	printf("Operation took %d milliseconds\n\n", msec);

	//print_table(&library_database); //Test to check how data from text file was being inserted
	// Clear the input buffer

	printf("\n\nLIBRARY BOOK DATABASE\n\n");
	int choice;
	int search_by = 0;
	String search = malloc(sizeof(buffer));
	int quit = 0;
	while (quit == 0)
	{
		String title = malloc((strlen(buffer) + 1) * sizeof(char));
		String author = malloc((strlen(buffer) + 1) * sizeof(char));
		String genre = malloc((strlen(buffer) + 1) * sizeof(char));
		printf("\nMenu\n");
		printf("0. Quit\n1. Search for book\n2. Add Book\n3. Delete Book\n");
		scanf("%d", &choice);
		switch (choice)
		{
		case(1):
			printf("\nSearch by:\n0. Year(1800-2200)\n1. Title\n2. Author\n3. Genre\n");
			scanf("%d", &search_by);
			printf("SEARCH: ");
			int c;
			while ((c = getchar()) != '\n' && c != EOF) {}
			fgets(search, strlen(buffer),stdin);
			search[strcspn(search, "\n")] = '\0';
			find_book_in_table(&library_database,search,search_by);
			break;
		case(2):
			printf("\nEnter Title: ");
			while (getchar() != '\n'); // Stops the skipping of the fgets line by removing the termination character is it isnt read in
			fgets(title, strlen(buffer), stdin);
			printf("\nEnter Author: ");
			fgets(author, strlen(buffer), stdin);
			printf("\nEnter Genre: ");
			fgets(genre, strlen(buffer), stdin);
			printf("\nEnter Year(1800-2200): ");
			scanf("%d", &year);
			author[strcspn(author, "\n")] = '\0';
			title[strcspn(title, "\n")] = '\0';
			genre[strcspn(genre, "\n")] = '\0';
			BookNodePtr inserted_book = create_book(title, author, genre, year);
			insert_book_to_table(&library_database, inserted_book);
			free(inserted_book);
			printf("\nYour book; %s by %s %s %d, was added to the database\n\n", title, author, genre, year);
			break;
		case(3):
			printf("\nEnter Title of book to remove: ");
			while (getchar() != '\n');
			fgets(title, strlen(buffer), stdin);
			printf("\nEnter Author of book to remove: ");
			fgets(author, strlen(buffer), stdin);
			printf("\nEnter Genre of book to remove: ");
			fgets(genre, strlen(buffer), stdin);
			printf("\nEnter Year of book to remove: ");
			scanf("%d", &year);
			author[strcspn(author, "\n")] = '\0';
			title[strcspn(title, "\n")] = '\0';
			genre[strcspn(genre, "\n")] = '\0';
			BookNodePtr deleted_book = create_book(title, author, genre, year);
			remove_book_from_table(&library_database, deleted_book);
			printf("\nThe book; %s by %s, was removed from the database\n\n", title, author);
			free(deleted_book);
			break;
		default:
			printf("Quitting LIBRARY BOOK DATABASE");
			quit = 1;
			break;
		}
		
	}
	free(&library_database);
}