ics_cli/src/main.c

#include "date_time_handling.h"
#include "list_handling.h"
#include "cut_string.h"
#include "move_lines.h"
#include "read_until_nl.h"
#include "read_until_string.h"
#include "seek_string_a.h"
#include "remove_whitespace.h"
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
#include <limits.h>

int main() {
	//const char ICS_PATH[] = "tests/calendar.ics";
	char *ICS_PATH;
	char *HOME = getenv("HOME");

	if (HOME != NULL) {
		ICS_PATH = strcat(HOME, "/.local/share/evolution/calendar/system/calendar.ics");
	} else {
		printf ("Environment variable HOME is not set.\n");
		return 1;
	}

	char my_line[4096] = "";

	int myfd = open(ICS_PATH, O_RDONLY);
	if (myfd == -1) {
		perror ("Error opening file");
		return 1;
	}

	// initialize linked list
	struct event *head = NULL;

	static char current_date[] = "xxxxxxxxTxxxxxx";
	get_date(current_date);
	printf ("Current date and time: %s\n\n", current_date);

	char date[256] = "";
	char summary[256] = "";

	while(read_until_nl(myfd, my_line)) {
		if (strncmp(my_line, "BEGIN:VEVENT", 12) == 0) {
			memset(my_line, '\0', sizeof(my_line));
			// go to DTSTART, but dont write to a variable
			seek_string_a(myfd, "DTSTART");
			read_until_string(myfd, my_line, "DTEND");
			remove_whitespace(my_line);
			cut_string(my_line, ':', 1);
			strcpy(date, my_line);

			memset(my_line, '\0', sizeof(my_line));

			seek_string_a(myfd, "SUMMARY:");
			read_until_string(myfd, my_line, "TRANSP:");
			remove_nl_and_cr(my_line);
			strcpy(summary, my_line);
			memset(my_line, '\0', sizeof(my_line));

			sorted_insert(&head, date, summary);
			memset(date, '\0', sizeof(date));
			memset(summary, '\0', sizeof(summary));
		}
		memset(my_line, '\0', sizeof(my_line));
	}

	//print_list(head);
	print_upcoming(head, current_date);

	free_list(head);

	return 0;
}