(Objective-C) Fetch Inbox Email Headers

Downloads the headers of all emails in the Inbox and shows some information about each, such as From, Subject, and whether the email has been seen (already read) or not.

Chilkat Objective-C Library Downloads MAC OS X (Cocoa) Libs iOS Libs

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

// This example requires 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];
BOOL success = [imap Connect: @"imap.someMailServer.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;
}

// Normally, when an email is downloaded, its "Seen" flag is automatically set.
// We don't want our program to be interfering with the "Seen" flags.
// To do this, set the PeekMode to YES.
imap.PeekMode = YES;

// After selecting the mailbox, the NumMessages property
// will contain the number of emails in the mailbox.
// When sequence numbers (not UIDs) are used to reference emails,
// they range from 1 to N, where N is the number of messages in the mailbox.
// This example will download the headers by sequence numbers.
CkoEmailBundle *bundle = [imap FetchSequenceHeaders: [NSNumber numberWithInt: 1] numMessages: imap.NumMessages];
if (imap.LastMethodSuccess != YES) {
    NSLog(@"%@",imap.LastErrorText);
    return;
}

if ([bundle.MessageCount intValue] == 0) {
    NSLog(@"%@",@"No messages in Inbox.");

    return;
}

// Loop over the email headers.  
int i;
for (i = 0; i <= [bundle.MessageCount intValue] - 1; i++) {
    CkoEmail *emailHeader = [bundle GetEmail: [NSNumber numberWithInt: i]];
    NSLog(@"%@",emailHeader.From);
    NSLog(@"%@",emailHeader.Subject);

    // Get the "Seen" flag.
    // When an email is fetched from the IMAP server, the email flags are stored
    // within the email in the "ckx-imap-flags" header.
    // The call to GetMailFlag is simply getting the information from the email header.
    // (it is not communicating with the IMAP server to get this information, because
    // the information was obtained when downloading the headers)
    int seenFlag = [[imap GetMailFlag: emailHeader flagName: @"Seen"] intValue];
    if (seenFlag == 1) {
        NSLog(@"%@",@"This email has been read (already seen)");
    }
    else {
        NSLog(@"%@",@"This email has not yet been read (it is not yet seen)");
    }

    // We can also look directly at the "ckx-imap-flags" header:
    NSLog(@"%@%@",@"ckx-imap-flags: ",[emailHeader GetHeaderField: @"ckx-imap-flags"]);

    NSLog(@"%@",@"--");

}

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