(Objective-C) How to Copy IMAP Mail to another IMAP Server

Demonstrates how to copy the entire contents of an IMAP mailbox to another IMAP server.

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#import <CkoImap.h>
#import <CkoStringArray.h>

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

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

// Connect to our source IMAP server.
BOOL success = [imapSrc Connect: @"imap.someMailServer.com"];
if (success != YES) {
    NSLog(@"%@",imapSrc.LastErrorText);
    return;
}

// Login to the source IMAP server
success = [imapSrc Login: @"admin@chilkatsoft.com" password: @"myPassword"];
if (success != YES) {
    NSLog(@"%@",imapSrc.LastErrorText);
    return;
}

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

// Connect to our destination IMAP server.
success = [imapDest Connect: @"mail.example-code.com"];
if (success != YES) {
    NSLog(@"%@",imapDest.LastErrorText);
    return;
}

// Login to the destination IMAP server
success = [imapDest Login: @"myLogin" password: @"myPassword"];
if (success != YES) {
    NSLog(@"%@",imapDest.LastErrorText);
    return;
}

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

// After selecting a mailbox, the NumMessages property will
// be updated to reflect the total number of emails in the mailbox:
NSLog(@"%d",[imapSrc.NumMessages intValue]);

// The emails in the mailbox will always have sequence numbers
// ranging from 1 to NumMessages.

// This example will copy the first 10 messages.
// We'll leave it up to you to write code to copy
// the entire sequence range in reasonable size chunks.
int startSeqNum = 1;
int msgCount = 10;

CkoStringArray *sa = 0;
sa = [imapSrc FetchSequenceAsMime: [NSNumber numberWithInt: startSeqNum] count: [NSNumber numberWithInt: msgCount]];
if (imapSrc.LastMethodSuccess != YES) {
    NSLog(@"%@",imapSrc.LastErrorText);
    return;
}

int i;
for (i = 0; i <= [sa.Count intValue] - 1; i++) {
    success = [imapDest AppendMime: @"Inbox" mimeText: [sa GetString: [NSNumber numberWithInt: i]]];
    if (success != YES) {
        NSLog(@"%@",imapDest.LastErrorText);
        return;
    }

}

// Disconnect from the IMAP servers.
success = [imapSrc Disconnect];
success = [imapDest Disconnect];