src/Makefile

@@ -1,5 +1,6 @@
 CC = gcc
 CFLAGS = -Wall
+LDFLAGS = -luuid
 
 # List of all source files (assuming they're all in the same directory)
 SRC_FILES = $(wildcard *.c)
@@ -7,8 +8,9 @@ SRC_FILES = $(wildcard *.c)
 # Generate a list of object files by replacing the .c extension with .o
 OBJ_FILES = $(SRC_FILES:.c=.o)
 
+# linking
 ics_analyzer: $(OBJ_FILES)
-	gcc -Wall $(OBJ_FILES) -o ics_analyzer
+	gcc -Wall $(OBJ_FILES) -o ics_analyzer $(LDFLAGS)
 
 main.o: main.c
 	$(CC) $(CFLAGS) -c $<

src/insert_event.c

@@ -4,15 +4,27 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <uuid/uuid.h>
 
 void insert_event(char *file_name) {
 	int myfd = open(file_name, O_RDWR);
-
+	int all_day_event = 0;
 	char summary_buf[256] = "SUMMARY:";
-
 	char *input_buffer = &summary_buf[8];
+	uuid_t uuid;
+	char uuid_str[37] = "";
 
 	printf("Insert a new event\n");
+
+	printf("Is this an all day event? [y/n] ");
+	all_day_event = binary_user_choice();
+
+	if (all_day_event) {
+		printf("this will be an all day event\n");
+	} else {
+		printf("this will not be an all day event\n");
+	}
+
 	printf("SUMMARY: ");
 	fgets (input_buffer, (sizeof(summary_buf)-strlen(summary_buf)), stdin);
 
@@ -24,8 +36,15 @@ void insert_event(char *file_name) {
 	summary_buf[strlen(summary_buf)-1] = '\r';
 	summary_buf[strlen(summary_buf)] = '\n';
 
+	uuid_generate(uuid);
+	// parse uuid to a string
+	uuid_unparse(uuid, uuid_str);
+
 	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, summary_buf, strlen(summary_buf));
 	write(myfd, "END:VCALENDAR\r\n", strlen("END:VCALENDAR\r\n"));
 
@@ -55,3 +74,23 @@ void seek_cal_end(int fd) {
 		lseek(fd, -2, SEEK_CUR);
 	}
 }
+
+
+int binary_user_choice() {
+	char input_buffer[64] = "";
+	if (fgets (input_buffer, sizeof(input_buffer), stdin) == NULL) {
+		printf ("an fgets error occured\n");
+	}
+	if (! strchr(input_buffer, '\n')) {
+		printf ("Input buffer overflow!\n");
+		exit(1);
+	}
+	if (input_buffer[0] == 'n' || input_buffer[0] == 'N') {
+		return 0;
+	} else if (input_buffer[0] == 'y' || input_buffer[0] == 'Y') {
+		return 1;
+	} else {
+		printf ("Please enter a N/n or Y/y character!\n");
+		exit(1);
+	}
+}

src/insert_event.h

@@ -2,3 +2,4 @@
 
 void insert_event(char *file_name);
 void seek_cal_end(int fd);
+int binary_user_choice();