(Objective-C) IMAP Delete Old Email (before a specified date)

Demonstrates how to delete email older than a particular date.

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#import <CkoImap.h>
#import <CkoMessageSet.h>
#import <CkoEmail.h>

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

CkoImap *imap = [[CkoImap alloc] init];

// Connect to an IMAP server.
// Use TLS
imap.Ssl = YES;
imap.Port = [NSNumber numberWithInt:993];
// Use your IMAP server domain.  This example 
BOOL success = [imap Connect: @"my-imap-server-domain.com"];
if (success != YES) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

// Login
success = [imap Login: @"myLogin" password: @"myPassword"];
if (success != YES) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

// Select an IMAP mailbox
success = [imap SelectMailbox: @"Inbox"];
if (success != YES) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

// Get message ID's for emails older than 1/1/2018
CkoMessageSet *messageSet = 0;
BOOL fetchUids = YES;
messageSet = [imap Search: @"SENTBEFORE 01-Jan-2018" bUid: fetchUids];
if (imap.LastMethodSuccess == NO) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

// If desired, we can examine the Subject of each email to be deleted..
int i = 0;
int count = [messageSet.Count intValue];
while (i < count) {
    CkoEmail *email = [imap FetchSingleHeader: [messageSet GetId: [NSNumber numberWithInt: i]] bUid: YES];
    if (imap.LastMethodSuccess == YES) {
        NSLog(@"%@",email.Subject);

    }

    i = i + 1;
}

// Set the Deleted flag for each message:
success = [imap SetFlags: messageSet flagName: @"Deleted" value: [NSNumber numberWithInt: 1]];
if (success != YES) {
    NSLog(@"%@",imap.LastErrorText);

    return;
}

// Expunge and close the mailbox.
success = [imap ExpungeAndClose];
if (success != YES) {
    NSLog(@"%@",imap.LastErrorText);

    return;
}

// Disconnect from the IMAP server.
success = [imap Disconnect];