src/date_time_handling.c

@@ -4,12 +4,18 @@
 #include <time.h>
 #include <string.h>
 
+// buffer needs to contain this string: "xxxxxxxxTxxxxxx"
+// or "YYYYmmddTHHMMSSZ"
 void get_date(char buffer[]) {
 	// add 1 because strlen does not include the null character
 	size_t buffer_size = strlen(buffer) + 1;
 	time_t my_unix_ts = time(NULL);
 	struct tm* my_tm_local = localtime(&my_unix_ts);
+	if (strlen(buffer) == 15) {
 		strftime(buffer, buffer_size, "%Y%m%dT%H%M%S", my_tm_local);
+	} else if (strlen(buffer) == 16) {
+		strftime(buffer, buffer_size, "%Y%m%dT%H%M%SZ", my_tm_local);
+	}
 }
 
 // 20230823T194138 -> 2023-08-23 19:41:38

src/insert_event.c

@@ -1,4 +1,5 @@
 #include "insert_event.h"
+#include "date_time_handling.h"
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -13,6 +14,7 @@ void insert_event(char *file_name) {
 	char *input_buffer = &summary_buf[8];
 	uuid_t uuid;
 	char uuid_str[37] = "";
+	char dtstamp[] = "YYYYmmddTHHMMSSZ";
 
 	printf("Insert a new event\n");
 
@@ -40,11 +42,16 @@ void insert_event(char *file_name) {
 	// parse uuid to a string
 	uuid_unparse(uuid, uuid_str);
 
+	get_date(dtstamp);
+
 	seek_cal_end(myfd);
 	write(myfd, "BEGIN:VEVENT\r\n", strlen("BEGIN:VEVENT\r\n"));
 	write(myfd, "UID:", strlen("UID:"));
 	write(myfd, uuid_str, strlen(uuid_str));
 	write(myfd, "\r\n", strlen("\r\n"));
+	write(myfd, "DTSTAMP:", strlen("DTSTAMP:"));
+	write(myfd, dtstamp, strlen(dtstamp));
+	write(myfd, "\r\n", strlen("\r\n"));
 	write(myfd, summary_buf, strlen(summary_buf));
 	write(myfd, "END:VCALENDAR\r\n", strlen("END:VCALENDAR\r\n"));
 
@@ -75,7 +82,6 @@ void seek_cal_end(int fd) {
 	}
 }
 
-
 int binary_user_choice() {
 	char input_buffer[64] = "";
 	if (fgets (input_buffer, sizeof(input_buffer), stdin) == NULL) {