--- /dev/null
+/*
+ Copyright (C) 2004 SKYRIX Software AG
+
+ This file is part of OpenGroupware.org.
+
+ OGo is free software; you can redistribute it and/or modify it under
+ the terms of the GNU Lesser General Public License as published by the
+ Free Software Foundation; either version 2, or (at your option) any
+ later version.
+
+ OGo is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+ License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with OGo; see the file COPYING. If not, write to the
+ Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA.
+*/
+
+#include "iCalRenderer.h"
+#include "iCalEvent.h"
+#include "iCalPerson.h"
+#include "common.h"
+
+@interface NSDate(UsedPrivates)
+- (NSString *)icalString; // declared in NGiCal
+@end
+
+@implementation iCalRenderer
+
+static iCalRenderer *renderer = nil;
+
+/* assume length of 1K - reasonable ? */
+static unsigned DefaultICalStringCapacity = 1024;
+
++ (id)sharedICalendarRenderer {
+ if (renderer == nil)
+ renderer = [[self alloc] init];
+ return renderer;
+}
+
+/* renderer */
+
+- (void)addPreambleForAppointment:(iCalEvent *)_apt
+ toString:(NSMutableString *)s
+{
+ [s appendString:@"BEGIN:VCALENDAR\r\nMETHOD:REQUEST\r\n"];
+ [s appendString:@"PRODID:NGiCal/4.3\r\n"];
+ [s appendString:@"VERSION:2.0\r\n"];
+}
+- (void)addPostambleForAppointment:(iCalEvent *)_apt
+ toString:(NSMutableString *)s
+{
+ [s appendString:@"END:VCALENDAR\r\n"];
+}
+
+- (void)addOrganizer:(iCalPerson *)p toString:(NSMutableString *)s {
+ NSString *x;
+
+ if (![p isNotNull]) return;
+
+ [s appendString:@"ORGANIZER;CN=\""];
+ if ((x = [p cn]))
+ [s appendString:[x iCalDQUOTESafeString]];
+
+ [s appendString:@"\""];
+ if ((x = [p email])) {
+ [s appendString:@":"]; /* sic! */
+ [s appendString:[x iCalSafeString]];
+ }
+ [s appendString:@"\r\n"];
+}
+
+- (void)addAttendees:(NSArray *)persons toString:(NSMutableString *)s {
+ unsigned i, count;
+ iCalPerson *p;
+
+ count = [persons count];
+ for (i = 0; i < count; i++) {
+ NSString *x;
+
+ p = [persons objectAtIndex:i];
+ [s appendString:@"ATTENDEE;"];
+
+ if ((x = [p role])) {
+ [s appendString:@"ROLE="];
+ [s appendString:[x iCalSafeString]];
+ [s appendString:@";"];
+ }
+
+ [s appendString:@"CN=\""];
+ if ((x = [p cn])) {
+ [s appendString:[x iCalDQUOTESafeString]];
+ }
+ [s appendString:@"\""];
+ if ([(x = [p email]) isNotNull]) {
+ [s appendString:@":"]; /* sic! */
+ [s appendString:[x iCalSafeString]];
+ }
+ [s appendString:@"\r\n"];
+ }
+}
+
+- (void)addVEventForAppointment:(iCalEvent *)event
+ toString:(NSMutableString *)s
+{
+ [s appendString:@"BEGIN:VEVENT\r\n"];
+
+ [s appendString:@"SUMMARY:"];
+ [s appendString:[[event summary] iCalSafeString]];
+ [s appendString:@"\r\n"];
+ if ([[event location] length] > 0) {
+ [s appendString:@"LOCATION:"];
+ [s appendString:[[event location] iCalSafeString]];
+ [s appendString:@"\r\n"];
+ }
+ [s appendString:@"UID:"];
+ [s appendString:[event uid]];
+ [s appendString:@"\r\n"];
+
+ [s appendString:@"DTSTART:"];
+ [s appendString:[[event startDate] icalString]];
+ [s appendString:@"\r\n"];
+
+ if ([event hasEndDate]) {
+ [s appendString:@"DTEND:"];
+ [s appendString:[[event endDate] icalString]];
+ [s appendString:@"\r\n"];
+ }
+ if ([event hasDuration]) {
+ [s appendString:@"DURATION:"];
+ [s appendString:[event duration]];
+ [s appendString:@"\r\n"];
+ }
+ if ([[event priority] length] > 0) {
+ [s appendString:@"PRIORITY:"];
+ [s appendString:[event priority]];
+ [s appendString:@"\r\n"];
+ }
+ if ([[event categories] length] > 0) {
+ NSString *catString;
+
+ catString = [event categories];
+ [s appendString:@"CATEGORIES:"];
+ [s appendString:catString];
+ [s appendString:@"\r\n"];
+ }
+ if ([[event comment] length] > 0) {
+ [s appendString:@"DESCRIPTION:"]; /* this is what iCal.app does */
+ [s appendString:[[event comment] iCalSafeString]];
+ [s appendString:@"\r\n"];
+ }
+
+ [s appendString:@"STATUS:"];
+ [s appendString:[event status]];
+ [s appendString:@"\r\n"];
+
+
+ /* what's all this? */
+ [s appendString:@"TRANSP:OPAQUE\r\n"]; /* transparency */
+ [s appendString:@"CLASS:PRIVATE\r\n"]; /* classification [like 'top secret'] */
+
+ [self addOrganizer:[event organizer] toString:s];
+ [self addAttendees:[event attendees] toString:s];
+
+ /* postamble */
+ [s appendString:@"END:VEVENT\r\n"];
+}
+
+- (BOOL)isValidAppointment:(iCalEvent *)_apt {
+ if (![_apt isNotNull])
+ return NO;
+
+ if ([[_apt uid] length] == 0) {
+ [self logWithFormat:
+ @"WARNING: got apt without uid, rejecting iCal generation: %@",
+ _apt];
+ return NO;
+ }
+ if ([[[_apt startDate] icalString] length] == 0) {
+ [self logWithFormat:
+ @"WARNING: got apt without start date, "
+ @"rejecting iCal generation: %@",
+ _apt];
+ return NO;
+ }
+
+ return YES;
+}
+
+- (NSString *)vEventStringForEvent:(iCalEvent *)_apt {
+ NSMutableString *s;
+
+ if (![self isValidAppointment:_apt])
+ return nil;
+
+ s = [NSMutableString stringWithCapacity:DefaultICalStringCapacity];
+ [self addVEventForAppointment:_apt toString:s];
+ return s;
+}
+
+- (NSString *)iCalendarStringForEvent:(iCalEvent *)_apt {
+ NSMutableString *s;
+
+ if (![self isValidAppointment:_apt])
+ return nil;
+
+ s = [NSMutableString stringWithCapacity:DefaultICalStringCapacity];
+ [self addPreambleForAppointment:_apt toString:s];
+ [self addVEventForAppointment:_apt toString:s];
+ [self addPostambleForAppointment:_apt toString:s];
+ return s;
+}
+
+@end /* iCalRenderer */
+
+@interface NSString (SOGoiCal_Private)
+- (NSString *)iCalCleanString;
+@end
+
+@interface SOGoICalStringEscaper : NSObject <NGStringEscaping>
+{
+}
++ (id)sharedEscaper;
+@end
+
+@implementation SOGoICalStringEscaper
++ (id)sharedEscaper {
+ static id sharedInstance = nil;
+ if (!sharedInstance) {
+ sharedInstance = [[self alloc] init];
+ }
+ return sharedInstance;
+}
+
+- (NSString *)stringByEscapingString:(NSString *)_s {
+ unichar c;
+
+ if (!_s || [_s length] == 0)
+ return nil;
+
+ c = [_s characterAtIndex:0];
+ if (c == '\n') {
+ return @"\\n";
+ }
+ else if (c == '\r') {
+ return nil; /* effectively remove char */
+ }
+ return [NSString stringWithFormat:@"\\%@", _s];
+}
+
+@end
+
+@implementation NSString (SOGoiCal)
+
+#if 0
+- (NSString *)iCalFoldedString {
+ /* RFC2445, 4.1 Content Lines
+
+ The iCalendar object is organized into individual lines of text,
+ called content lines. Content lines are delimited by a line break,
+ which is a CRLF sequence (US-ASCII decimal 13, followed by US-ASCII
+ decimal 10).
+ Lines of text SHOULD NOT be longer than 75 octets, excluding the line
+ break. Long content lines SHOULD be split into a multiple line
+ representations using a line "folding" technique. That is, a long
+ line can be split between any two characters by inserting a CRLF
+ immediately followed by a single linear white space character (i.e.,
+ SPACE, US-ASCII decimal 32 or HTAB, US-ASCII decimal 9).
+ Any sequence of CRLF followed immediately by a single linear white space
+ character is ignored (i.e., removed) when processing the content type.
+ */
+}
+#endif
+
+/* strip off any characters from string which are not allowed in iCal */
+- (NSString *)iCalCleanString {
+ static NSCharacterSet *replaceSet = nil;
+
+ if (replaceSet == nil) {
+ replaceSet = [NSCharacterSet characterSetWithCharactersInString:@"\r"];
+ [replaceSet retain];
+ }
+
+ return [self stringByEscapingCharactersFromSet:replaceSet
+ usingStringEscaping:[SOGoICalStringEscaper sharedEscaper]];
+}
+
+- (NSString *)iCalDQUOTESafeString {
+ static NSCharacterSet *escapeSet = nil;
+
+ if (escapeSet == nil) {
+ escapeSet = [NSCharacterSet characterSetWithCharactersInString:@"\\\""];
+ [escapeSet retain];
+ }
+ return [self iCalEscapedStringWithEscapeSet:escapeSet];
+}
+
+- (NSString *)iCalSafeString {
+ static NSCharacterSet *escapeSet = nil;
+
+ if (escapeSet == nil) {
+ escapeSet =
+ [[NSCharacterSet characterSetWithCharactersInString:@"\n,;\\\""] retain];
+ }
+ return [self iCalEscapedStringWithEscapeSet:escapeSet];
+}
+
+/* Escape unsafe characters */
+- (NSString *)iCalEscapedStringWithEscapeSet:(NSCharacterSet *)_es {
+ NSString *s;
+
+ s = [self iCalCleanString];
+ return [s stringByEscapingCharactersFromSet:_es
+ usingStringEscaping:[SOGoICalStringEscaper sharedEscaper]];
+}
+
+@end /* NSString (SOGoiCal) */
projects / sope / commitdiff