Merge pull request 'unfolding-function' (#4) from unfolding-function into master

Reviewed-on: bjoernf/ics_analyzer#4

.gitignore

@@ -1,3 +1,4 @@
 icscli
 .gitconfig
 *.o
+tags

src/list_handling.c

@@ -52,7 +52,7 @@ void print_upcoming(struct event *head, char current_start_date[], int show_all_
 		if (strcmp(head->start_date, current_start_date) >= 0) {
 			pretty_print_date_time(head->start_date);
 			print_end_date(head->end_date, head->start_date);
-			printf("\n%s\n", head->summary);
+			printf("\nSUMMARY: %s\n", head->summary);
 
 			if (!show_all_events) {
 				i++;

src/main.c

@@ -19,6 +19,7 @@ int main(int argc, char **argv) {
 	get_cli_args(argc, argv, &ics_path, &show_all_events);
 
 	char my_event[8192] = "";
+	char unfolded_event[8192] = "";
 
 	int myfd = open(ics_path, O_RDONLY);
 	if (myfd == -1) {
@@ -39,7 +40,8 @@ int main(int argc, char **argv) {
 		if (strncmp(my_event, "BEGIN:VEVENT", 12) == 0) {
 			memset(my_event, '\0', sizeof(my_event));
 			read_until_string(myfd, my_event, "END:VEVENT");
-			parse_event(my_event, &head);
+			unfolding_string(my_event, unfolded_event);
+			parse_event(unfolded_event, &head);
 		}
 		memset(my_event, '\0', sizeof(my_event));
 	}

src/parse_ics.c

@@ -4,14 +4,14 @@
 #include <stdlib.h>
 #include <string.h>
 #include <assert.h>
+#include <ctype.h>
+#include <stdio.h>
 
 void parse_event(char event_string[], struct event **head) {
-	char *start_date = strstr(event_string, "\r\nDTSTART;");
-	char *end_date = strstr(event_string, "\r\nDTEND;");
-	char *sequence = strstr(event_string, "\r\nSEQUENCE:");
-	char *summary = strstr(event_string, "\r\nSUMMARY");
-	char *location = strstr(event_string, "\r\nLOCATION:");
-	char *transp = strstr(event_string, "\r\nTRANSP:");
+	char *start_date = strstr(event_string, "\nDTSTART");
+	char *end_date = strstr(event_string, "\nDTEND");
+	char *summary = strstr(event_string, "\nSUMMARY");
+	summary = strchr(summary, ':') + 1;
 
 	char *start_date_str = malloc(256);
 	char *end_date_str = malloc(256);
@@ -23,23 +23,14 @@ void parse_event(char event_string[], struct event **head) {
 
 	assert(start_date != NULL);
 	assert(end_date != NULL);
-	assert(sequence != NULL);
 	assert(summary != NULL);
-	assert(transp != NULL);
 
-	strncpy(start_date_str, start_date, end_date - start_date);
+	strncpy(start_date_str, start_date,
+		strchr(start_date + 1, '\n') - start_date);
 
-	strncpy(end_date_str, end_date, sequence - end_date);
+	strncpy(end_date_str, end_date, strchr(end_date + 1, '\n') - end_date);
 
-	if (location != NULL) {
-		strncpy(summary_str,\
-		summary + strlen("\r\nSUMMARY:"),\
-		location - summary - strlen("\r\nSUMMARY:"));
-	} else {
-		strncpy(summary_str,\
-		summary + strlen("\r\nSUMMARY:"),\
-		transp - summary - strlen("\r\nSUMMARY:"));
-	}
+	strncpy(summary_str, summary, strchr(summary + 1, '\n') - summary);
 
 	// parse dates
 	remove_whitespace(start_date_str);
@@ -47,7 +38,7 @@ void parse_event(char event_string[], struct event **head) {
 
 	remove_whitespace(end_date_str);
 	cut_string(end_date_str, ':', 1);
-	
+
 	sorted_insert(head, start_date_str, end_date_str, summary_str);
 
 	free(start_date_str);
@@ -55,3 +46,24 @@ void parse_event(char event_string[], struct event **head) {
 	free(summary_str);
 }
 
+// the unfolded string has a space
+// as a separator between what where previously separate lines
+void unfolding_string(char *folded_string, char *unfolded_string) {
+	int j = 0;
+	for (int i = 0; i < strlen(folded_string); i++) {
+		if (folded_string[i] == '\r' && folded_string[i + 1] == '\n'
+		    && isblank(folded_string[i + 2])) {
+			i += 3;
+			while (isblank(folded_string[i])) {
+				i++;
+			}
+			unfolded_string[j] = ' ';
+			j++;
+			unfolded_string[j] = folded_string[i];
+			j++;
+		} else {
+			unfolded_string[j] = folded_string[i];
+			j++;
+		}
+	}
+}

src/parse_ics.h

@@ -1,3 +1,4 @@
 #pragma once
 
 void parse_event(char event_string[], struct event **head);
+void unfolding_string(char* folded_string, char* unfolded_string);

tests/folded_with_spaces.ics

@@ -0,0 +1,27 @@
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//www.example.com//iCal 4.0.3//EN
+METHOD:PUBLISH
+CALSCALE:GREGORIAN
+BEGIN:VEVENT
+CREATED:20240102T105004
+UID:ical-19709628-example-com
+DTSTART;VALUE=DATE:20250622T000000
+DTEND;VALUE=DATE:20250711T000000
+TRANSP:TRANSPARENT
+SUMMARY:vacation
+ (approved)
+  (again)
+DESCRIPTION:vacation\n\n
+ status: approved\n
+  workdays: 13,0\n\n
+   entered by: John Doe\n
+    entry date: Tue, 2024-01-02, 10:09 AM\n
+     approved on: -\n\n\n\n
+      Powered by example.com\n
+DTSTAMP:20240102T105004
+CATEGORIES:example.com
+X-MICROSOFT-CDO-BUSYSTATUS:OOF
+SEQUENCE:8
+END:VEVENT
+END:VCALENDAR

tests/folded_with_tabs.ics

@@ -9,7 +9,9 @@ UID:ical-19709628-example-com
 DTSTART;VALUE=DATE:20250622T000000
 DTEND;VALUE=DATE:20250711T000000
 TRANSP:TRANSPARENT
-SUMMARY:vacation (approved)
+SUMMARY:vacation
+	(approved)
+		(again)
 DESCRIPTION:vacation\n\n
 	status: approved\n
 		workdays: 13,0\n\n