/*
 * MailCore
 *
 * Copyright (C) 2007 - Matt Ronge
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the MailCore project nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#import <libetpan/libetpan.h>
#import "CTCoreMessage.h"
#import "CTCoreFolder.h"
#import "MailCoreTypes.h"
#import "CTCoreAddress.h"
#import "CTMIMEFactory.h"
#import "CTMIME_MessagePart.h"
#import "CTMIME_TextPart.h"
#import "CTMIME_MultiPart.h"
#import "CTMIME_SinglePart.h"
#import "CTBareAttachment.h"
#import "CTMIME_HtmlPart.h"
#import "MailCoreUtilities.h"

@interface CTCoreMessage ()
- (CTCoreAddress *)_addressFromMailbox:(struct mailimf_mailbox *)mailbox;
- (NSSet *)_addressListFromMailboxList:(struct mailimf_mailbox_list *)mailboxList;
- (struct mailimf_mailbox_list *)_mailboxListFromAddressList:(NSSet *)addresses;
- (NSSet *)_addressListFromIMFAddressList:(struct mailimf_address_list *)imfList;
- (struct mailimf_address_list *)_IMFAddressListFromAddresssList:(NSSet *)addresses;
- (void)_buildUpBodyText:(CTMIME *)mime result:(NSMutableString *)result;
- (void)_buildUpHtmlBodyText:(CTMIME *)mime result:(NSMutableString *)result;
@end

@implementation CTCoreMessage
@synthesize mime=myParsedMIME, lastError;

- (id)init {
    [super init];
    if (self) {
        struct mailimf_fields *fields = mailimf_fields_new_empty();
        myFields = mailimf_single_fields_new(fields);
        mailimf_fields_free(fields);
    }
    return self;
}


- (id)initWithMessageStruct:(struct mailmessage *)message {
    self = [super init];
    if (self) {
        assert(message != NULL);
        myMessage = message;
        myFields = mailimf_single_fields_new(message->msg_fields);
    }
    return self;
}

- (id)initWithFileAtPath:(NSString *)path {
    return [self initWithString:[NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:NULL]];
}

- (id)initWithString:(NSString *)msgData {
    struct mailmessage *msg = data_message_init((char *)[msgData cStringUsingEncoding:NSUTF8StringEncoding],
                                    [msgData lengthOfBytesUsingEncoding:NSUTF8StringEncoding]);
    int err;
    struct mailmime *dummyMime;
    /* mailmessage_get_bodystructure will fill the mailmessage struct for us */
    err = mailmessage_get_bodystructure(msg, &dummyMime);
    if (err != MAIL_NO_ERROR) {
        return nil;
    }
    return [self initWithMessageStruct:msg];
}


- (void)dealloc {
    if (myMessage != NULL) {
        mailmessage_flush(myMessage);
        mailmessage_free(myMessage);
    }
    if (myFields != NULL) {
        mailimf_single_fields_free(myFields);
    }
    self.lastError = nil;
    [myParsedMIME release];
    [super dealloc];
}

- (NSError *)lastError {
    return lastError;
}

- (BOOL)fetchBodyStructure {
    if (myMessage == NULL) {
        return NO;
    }

    int err;
    struct mailmime *dummyMime;
    //Retrieve message mime and message field
    err = mailmessage_get_bodystructure(myMessage, &dummyMime);
    if (err != MAIL_NO_ERROR) {
        self.lastError = MailCoreCreateErrorFromCode(err);
        return NO;
    }
    myParsedMIME = [[CTMIMEFactory createMIMEWithMIMEStruct:[self messageStruct]->msg_mime
                        forMessage:[self messageStruct]] retain];

    return YES;
}

- (void)setBodyStructure:(struct mailmime *)mime {
    myMessage->msg_mime = mime;
    myParsedMIME = [[CTMIMEFactory createMIMEWithMIMEStruct:[self messageStruct]->msg_mime
                                                 forMessage:[self messageStruct]] retain];
}

- (void)setFields:(struct mailimf_fields *)fields {
    if (myFields != NULL)
        mailimf_single_fields_free(myFields);
    myFields = mailimf_single_fields_new(fields);
}

- (NSString *)body {
    if (myFields == NULL || myParsedMIME == nil) {
        [self fetchBodyStructure];
    }
    NSMutableString *result = [NSMutableString string];
    [self _buildUpBodyText:myParsedMIME result:result];
    return result;
}

- (BOOL)hasHtmlBody:(CTMIME *)mime {
    if ([mime isKindOfClass:[CTMIME_MessagePart class]]) {
        return [self hasHtmlBody:[mime content]];
    }
    else if ([mime isKindOfClass:[CTMIME_TextPart class]]) {
        if ([[mime.contentType lowercaseString] rangeOfString:@"text/html"].location != NSNotFound) {
            return YES;
        }
    }
    else if ([mime isKindOfClass:[CTMIME_MultiPart class]]) {
        return YES;
    }

    return NO;
}

- (BOOL)hasHtmlBody {
    CTMIME* mime = myParsedMIME;
    return [self hasHtmlBody:mime];
}

- (NSString *)htmlBody {
    NSMutableString *result = [NSMutableString string];
    [self _buildUpHtmlBodyText:myParsedMIME result:result];
    return result;
}

- (NSString *)bodyPreferringPlainText {
    NSString *body = [self body];
    if ([body length] == 0) {
        body = [self htmlBody];
    }
    return body;
}


- (void)_buildUpBodyText:(CTMIME *)mime result:(NSMutableString *)result {
    if (mime == nil)
        return;

    if ([mime isKindOfClass:[CTMIME_MessagePart class]]) {
        [self _buildUpBodyText:[mime content] result:result];
    }
    else if ([mime isKindOfClass:[CTMIME_TextPart class]]) {
        if ([[mime.contentType lowercaseString] rangeOfString:@"text/plain"].location != NSNotFound) {
            [(CTMIME_TextPart *)mime fetchPart];
            NSString* y = [mime content];
            if(y != nil) {
                [result appendString:y];
            }
        }
    }
    else if ([mime isKindOfClass:[CTMIME_MultiPart class]]) {
        //TODO need to take into account the different kinds of multipart
        NSEnumerator *enumer = [[mime content] objectEnumerator];
        CTMIME *subpart;
        while ((subpart = [enumer nextObject])) {
            [self _buildUpBodyText:subpart result:result];
        }
    }
}

- (void)_buildUpHtmlBodyText:(CTMIME *)mime result:(NSMutableString *)result {
    if (mime == nil)
        return;

    if ([mime isKindOfClass:[CTMIME_MessagePart class]]) {
        [self _buildUpHtmlBodyText:[mime content] result:result];
    }
    else if ([mime isKindOfClass:[CTMIME_TextPart class]]) {
        if ([[mime.contentType lowercaseString] rangeOfString:@"text/html"].location != NSNotFound) {
            [(CTMIME_TextPart *)mime fetchPart];
            NSString* y = [mime content];
            if(y != nil) {
                [result appendString:y];
            }
        }
    }
    else if ([mime isKindOfClass:[CTMIME_MultiPart class]]) {
        //TODO need to take into account the different kinds of multipart
        NSEnumerator *enumer = [[mime content] objectEnumerator];
        CTMIME *subpart;
        while ((subpart = [enumer nextObject])) {
            [self _buildUpHtmlBodyText:subpart result:result];
        }
    }
}


- (void)setBody:(NSString *)body {
    CTMIME *oldMIME = myParsedMIME;
    CTMIME_TextPart *text = [CTMIME_TextPart mimeTextPartWithString:body];

    // If myParsedMIME is already a multi-part mime, just add it. otherwise replace it.
    //TODO: If setBody is called multiple times it will add text parts multiple times. Instead
    // it should find the existing text part (if there is one) and replace it
    if ([myParsedMIME isKindOfClass:[CTMIME_MultiPart class]]) {
        [(CTMIME_MultiPart *)myParsedMIME addMIMEPart:text];
    } else {
        CTMIME_MessagePart *messagePart = [CTMIME_MessagePart mimeMessagePartWithContent:text];
        myParsedMIME = [messagePart retain];
        [oldMIME release];
    }
}

- (void)setHTMLBody:(NSString *)body{
    CTMIME *oldMIME = myParsedMIME;
    CTMIME_HtmlPart *text = [CTMIME_HtmlPart mimeTextPartWithString:body];
    CTMIME_MessagePart *messagePart = [CTMIME_MessagePart mimeMessagePartWithContent:text];
    myParsedMIME = [messagePart retain];
    [oldMIME release];	
}

- (NSArray *)attachments {
    NSMutableArray *attachments = [NSMutableArray array];

    CTMIME_Enumerator *enumerator = [myParsedMIME mimeEnumerator];
    CTMIME *mime;
    while ((mime = [enumerator nextObject])) {
        if ([mime isKindOfClass:[CTMIME_SinglePart class]]) {
            CTMIME_SinglePart *singlePart = (CTMIME_SinglePart *)mime;
            if (singlePart.attached) {
                CTBareAttachment *attach = [[CTBareAttachment alloc]
                                                initWithMIMESinglePart:singlePart];
                [attachments addObject:attach];
                [attach release];
            }
        }
    }
    return attachments;
}

- (void)addAttachment:(CTCoreAttachment *)attachment {
    CTMIME_MultiPart *multi;
    CTMIME_MessagePart *msg;

    if ([myParsedMIME isKindOfClass:[CTMIME_MessagePart class]]) {
        msg = (CTMIME_MessagePart *)myParsedMIME;
        CTMIME *sub = [msg content];


        // Creat new multimime part if needed
        if ([sub isKindOfClass:[CTMIME_MultiPart class]]) {
            multi = (CTMIME_MultiPart *)sub;
        } else {
            multi = [CTMIME_MultiPart mimeMultiPart];
            [multi addMIMEPart:sub];
            [msg setContent:multi];
        }

        // add new SinglePart which encodes the attachment in base64
        CTMIME_SinglePart *attpart = [CTMIME_SinglePart mimeSinglePartWithData:[attachment data]];
        attpart.contentType = [attachment contentType];
        attpart.filename = [attachment filename];

        [multi addMIMEPart:attpart];
    }
}

- (NSString *)subject {
    if (myFields->fld_subject == NULL)
        return nil;
    NSString *decodedSubject = MailCoreDecodeMIMEPhrase(myFields->fld_subject->sbj_value);
    if (decodedSubject == nil)
        return nil;
    return decodedSubject;
}

- (void)setSubject:(NSString *)subject {
    struct mailimf_subject *subjectStruct;

    subjectStruct = mailimf_subject_new(strdup([subject cStringUsingEncoding:NSUTF8StringEncoding]));
    if (myFields->fld_subject != NULL)
        mailimf_subject_free(myFields->fld_subject);
    myFields->fld_subject = subjectStruct;
}

- (struct mailimf_date_time*)libetpanDateTime {    
    if(!myFields || !myFields->fld_orig_date || !myFields->fld_orig_date->dt_date_time)
        return NULL;

    return myFields->fld_orig_date->dt_date_time;
}

- (NSTimeZone*)senderTimeZone {
    struct mailimf_date_time *d;

    if((d = [self libetpanDateTime]) == NULL)
        return nil;

    NSInteger timezoneOffsetInSeconds = 3600*d->dt_zone/100;

    return [NSTimeZone timeZoneForSecondsFromGMT:timezoneOffsetInSeconds];
}

- (NSDate *)senderDate {
    if ( myFields->fld_orig_date == NULL) {
        return [NSDate distantPast];
    } else {
        struct mailimf_date_time *d;

        if ((d = [self libetpanDateTime]) == NULL)
            return nil;

        NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
        NSDateComponents *comps = [[NSDateComponents alloc] init];

        [comps setYear:d->dt_year];
        [comps setMonth:d->dt_month];
        [comps setDay:d->dt_day];
        [comps setHour:d->dt_hour];
        [comps setMinute:d->dt_min];
        [comps setSecond:d->dt_sec];

        NSDate *messageDateNoTimezone = [calendar dateFromComponents:comps];

        [comps release];
        [calendar release];

        // no timezone applied
        return messageDateNoTimezone;
    }
}

- (NSDate *)sentDateGMT {
    struct mailimf_date_time *d;

    if((d = [self libetpanDateTime]) == NULL)
        return nil;

    NSInteger timezoneOffsetInSeconds = 3600*d->dt_zone/100;

    NSDate *date = [self senderDate];

    return [date dateByAddingTimeInterval:timezoneOffsetInSeconds * -1];
}

- (NSDate*)sentDateLocalTimeZone {
    return [[self sentDateGMT] dateByAddingTimeInterval:[[NSTimeZone localTimeZone] secondsFromGMT]];
}

- (BOOL)isUnread {
    struct mail_flags *flags = myMessage->msg_flags;
    if (flags != NULL) {
        BOOL flag_seen = (flags->fl_flags & MAIL_FLAG_SEEN);
        return !flag_seen;
    }
    return NO;
}

- (BOOL)isStarred {
    struct mail_flags *flags = myMessage->msg_flags;
    if (flags != NULL) {
        BOOL flag_starred = (flags->fl_flags & MAIL_FLAG_FLAGGED);
        return flag_starred;
    }
    return NO;
}

- (BOOL)isNew {
    struct mail_flags *flags = myMessage->msg_flags;
    if (flags != NULL) {
        BOOL flag_seen = (flags->fl_flags & MAIL_FLAG_SEEN);
        BOOL flag_new = (flags->fl_flags & MAIL_FLAG_NEW);
        return !flag_seen && flag_new;
    }
    return NO;
}

- (NSString *)messageId {
    if (myFields->fld_message_id != NULL) {
        char *value = myFields->fld_message_id->mid_value;
        return [NSString stringWithCString:value encoding:NSUTF8StringEncoding];
    }
    return nil;
}

- (NSUInteger)uid {
    if (myMessage->msg_uid) {
        NSString *uidString = [[NSString alloc] initWithCString:myMessage->msg_uid encoding:NSASCIIStringEncoding];
        NSUInteger uid = (NSUInteger)[[[uidString componentsSeparatedByString:@"-"] objectAtIndex:1] intValue];
        [uidString release];
        return uid;
    }
    return 0;
}

- (NSUInteger)messageSize {
    return [self messageStruct]->msg_size;
}

- (NSUInteger)flags {
    if (myMessage != NULL && myMessage->msg_flags != NULL) {
        return myMessage->msg_flags->fl_flags;
    }
    return 0;
}

- (NSUInteger)sequenceNumber {
    return mySequenceNumber;
}

- (void)setSequenceNumber:(NSUInteger)sequenceNumber {
    mySequenceNumber = sequenceNumber;
}


- (NSSet *)from {
    if (myFields->fld_from == NULL)
        return nil;

    return [self _addressListFromMailboxList:myFields->fld_from->frm_mb_list];
}


- (void)setFrom:(NSSet *)addresses {
    struct mailimf_mailbox_list *imf = [self _mailboxListFromAddressList:addresses];
    if (myFields->fld_from != NULL)
        mailimf_from_free(myFields->fld_from);
    myFields->fld_from = mailimf_from_new(imf);
}


- (CTCoreAddress *)sender {
    if (myFields->fld_sender == NULL)
        return nil;

    return [self _addressFromMailbox:myFields->fld_sender->snd_mb];
}


- (NSSet *)to {
    if (myFields->fld_to == NULL)
        return nil;
    else
        return [self _addressListFromIMFAddressList:myFields->fld_to->to_addr_list];
}


- (void)setTo:(NSSet *)addresses {
    struct mailimf_address_list *imf = [self _IMFAddressListFromAddresssList:addresses];

    if (myFields->fld_to != NULL) {
        mailimf_address_list_free(myFields->fld_to->to_addr_list);
        myFields->fld_to->to_addr_list = imf;
    }
    else
        myFields->fld_to = mailimf_to_new(imf);
}


- (NSSet *)cc {
    if (myFields->fld_cc == NULL)
        return nil;
    else
        return [self _addressListFromIMFAddressList:myFields->fld_cc->cc_addr_list];
}


- (void)setCc:(NSSet *)addresses {
    struct mailimf_address_list *imf = [self _IMFAddressListFromAddresssList:addresses];
    if (myFields->fld_cc != NULL) {
        mailimf_address_list_free(myFields->fld_cc->cc_addr_list);
        myFields->fld_cc->cc_addr_list = imf;
    }
    else
        myFields->fld_cc = mailimf_cc_new(imf);
}


- (NSSet *)bcc {
    if (myFields->fld_bcc == NULL)
        return nil;
    else
        return [self _addressListFromIMFAddressList:myFields->fld_bcc->bcc_addr_list];
}


- (void)setBcc:(NSSet *)addresses {
    struct mailimf_address_list *imf = [self _IMFAddressListFromAddresssList:addresses];
    if (myFields->fld_bcc != NULL) {
        mailimf_address_list_free(myFields->fld_bcc->bcc_addr_list);
        myFields->fld_bcc->bcc_addr_list = imf;
    }
    else
        myFields->fld_bcc = mailimf_bcc_new(imf);
}


- (NSSet *)replyTo {
    if (myFields->fld_reply_to == NULL)
        return nil;
    else
        return [self _addressListFromIMFAddressList:myFields->fld_reply_to->rt_addr_list];
}


- (void)setReplyTo:(NSSet *)addresses {
    struct mailimf_address_list *imf = [self _IMFAddressListFromAddresssList:addresses];
    if (myFields->fld_reply_to != NULL) {
        mailimf_address_list_free(myFields->fld_reply_to->rt_addr_list);
        myFields->fld_reply_to->rt_addr_list = imf;
    }
    else
        myFields->fld_reply_to = mailimf_reply_to_new(imf);
}


- (NSString *)render {
    CTMIME *msgPart = myParsedMIME;

    if ([myParsedMIME isKindOfClass:[CTMIME_MessagePart class]]) {
        /* It's a message part, so let's set it's fields */
        struct mailimf_fields *fields;
        struct mailimf_mailbox *sender = (myFields->fld_sender != NULL) ? (myFields->fld_sender->snd_mb) : NULL;
        struct mailimf_mailbox_list *from = (myFields->fld_from != NULL) ? (myFields->fld_from->frm_mb_list) : NULL;
        struct mailimf_address_list *replyTo = (myFields->fld_reply_to != NULL) ? (myFields->fld_reply_to->rt_addr_list) : NULL;
        struct mailimf_address_list *to = (myFields->fld_to != NULL) ? (myFields->fld_to->to_addr_list) : NULL;
        struct mailimf_address_list *cc = (myFields->fld_cc != NULL) ? (myFields->fld_cc->cc_addr_list) : NULL;
        struct mailimf_address_list *bcc = (myFields->fld_bcc != NULL) ? (myFields->fld_bcc->bcc_addr_list) : NULL;
        clist *inReplyTo = (myFields->fld_in_reply_to != NULL) ? (myFields->fld_in_reply_to->mid_list) : NULL;
        clist *references = (myFields->fld_references != NULL) ? (myFields->fld_references->mid_list) : NULL;
        char *subject = (myFields->fld_subject != NULL) ? (myFields->fld_subject->sbj_value) : NULL;

        //TODO uh oh, when this get freed it frees stuff in the CTCoreMessage
        //TODO Need to make sure that fields gets freed somewhere
        fields = mailimf_fields_new_with_data(from, sender, replyTo, to, cc, bcc, inReplyTo, references, subject);
        [(CTMIME_MessagePart *)msgPart setIMFFields:fields];
    }
    return [myParsedMIME render];
}

- (NSData *)messageAsEmlx {
    NSString *msgContent = [[self rfc822] stringByReplacingOccurrencesOfString:@"\r\n" withString:@"\n"];
    NSData *msgContentAsData = [msgContent dataUsingEncoding:NSUTF8StringEncoding];
    NSMutableData *emlx = [NSMutableData data];
    [emlx appendData:[[NSString stringWithFormat:@"%-10d\n", msgContentAsData.length] dataUsingEncoding:NSUTF8StringEncoding]];
    [emlx appendData:msgContentAsData];


    struct mail_flags *flagsStruct = myMessage->msg_flags;
    uint64_t flags = 0;
    if (flagsStruct != NULL) {
        BOOL seen = (flagsStruct->fl_flags & CTFlagSeen) > 0;
        flags |= seen << 0;
        BOOL answered = (flagsStruct->fl_flags & CTFlagAnswered) > 0;
        flags |= answered << 2;
        BOOL flagged = (flagsStruct->fl_flags & CTFlagFlagged) > 0;
        flags |= flagged << 4;
        BOOL forwarded = (flagsStruct->fl_flags & CTFlagForwarded) > 0;
        flags |= forwarded << 8;
    }

    NSMutableDictionary *dictionary = [NSMutableDictionary dictionary];
    [dictionary setValue:[NSNumber numberWithDouble:[[self senderDate] timeIntervalSince1970]] forKey:@"date-sent"];
    [dictionary setValue:[NSNumber numberWithUnsignedLongLong:flags] forKey:@"flags"];
    [dictionary setValue:[self subject] forKey:@"subject"];

    NSError *error;
    NSData *propertyList = [NSPropertyListSerialization dataWithPropertyList:dictionary
                                                                      format:NSPropertyListXMLFormat_v1_0
                                                                     options:0
                                                                       error:&error];
    [emlx appendData:propertyList];
    return emlx;
}

- (NSString *)rfc822 {
    char *result = NULL;
    NSString *nsresult;
    int r = mailimap_fetch_rfc822([self imapSession], [self sequenceNumber], &result);
    if (r == MAIL_NO_ERROR) {
        nsresult = [[NSString alloc] initWithCString:result encoding:NSUTF8StringEncoding];
    } else {
        self.lastError = MailCoreCreateErrorFromCode(r);
        return nil;
    }
    mailimap_msg_att_rfc822_free(result);
    return [nsresult autorelease];
}


- (struct mailmessage *)messageStruct {
    return myMessage;
}

- (mailimap *)imapSession; {
    struct imap_cached_session_state_data * cached_data;
    struct imap_session_state_data * data;
    mailsession *session = [self messageStruct]->msg_session;

    if (strcasecmp(session->sess_driver->sess_name, "imap-cached") == 0) {
        cached_data = session->sess_data;
        session = cached_data->imap_ancestor;
    }

    data = session->sess_data;
    return data->imap_session;
}

/*********************************** myprivates ***********************************/
- (CTCoreAddress *)_addressFromMailbox:(struct mailimf_mailbox *)mailbox; {
    CTCoreAddress *address = [CTCoreAddress address];
    if (mailbox == NULL) {
        return address;
    }
    if (mailbox->mb_display_name != NULL) {
        NSString *decodedName = MailCoreDecodeMIMEPhrase(mailbox->mb_display_name);
        if (decodedName == nil) {
            decodedName = @"";
        }
        [address setName:decodedName];
    }
    if (mailbox->mb_addr_spec != NULL) {
        [address setEmail:[NSString stringWithCString:mailbox->mb_addr_spec encoding:NSUTF8StringEncoding]];
    }
    return address;
}


- (NSSet *)_addressListFromMailboxList:(struct mailimf_mailbox_list *)mailboxList; {
    clist *list;
    clistiter * iter;
    struct mailimf_mailbox *address;
    NSMutableSet *addressSet = [NSMutableSet set];

    if (mailboxList == NULL)
        return addressSet;

    list = mailboxList->mb_list;
    for(iter = clist_begin(list); iter != NULL; iter = clist_next(iter)) {
        address = clist_content(iter);
        [addressSet addObject:[self _addressFromMailbox:address]];
    }
    return addressSet;
}


- (struct mailimf_mailbox_list *)_mailboxListFromAddressList:(NSSet *)addresses {
    struct mailimf_mailbox_list *imfList = mailimf_mailbox_list_new_empty();
    NSEnumerator *objEnum = [addresses objectEnumerator];
    CTCoreAddress *address;
    int err;
    const char *addressName;
    const char *addressEmail;

    while((address = [objEnum nextObject])) {
        addressName = [[address name] cStringUsingEncoding:NSUTF8StringEncoding];
        addressEmail = [[address email] cStringUsingEncoding:NSUTF8StringEncoding];
        err =  mailimf_mailbox_list_add_mb(imfList, strdup(addressName), strdup(addressEmail));
        assert(err == 0);
    }
    return imfList;
}


- (NSSet *)_addressListFromIMFAddressList:(struct mailimf_address_list *)imfList {
    clist *list;
    clistiter * iter;
    struct mailimf_address *address;
    NSMutableSet *addressSet = [NSMutableSet set];

    if (imfList == NULL)
        return addressSet;

    list = imfList->ad_list;
    for(iter = clist_begin(list); iter != NULL; iter = clist_next(iter)) {
        address = clist_content(iter);
        /* Check to see if it's a solo address a group */
        if (address->ad_type == MAILIMF_ADDRESS_MAILBOX) {
            [addressSet addObject:[self _addressFromMailbox:address->ad_data.ad_mailbox]];
        }
        else {
            if (address->ad_data.ad_group->grp_mb_list != NULL)
                [addressSet unionSet:[self _addressListFromMailboxList:address->ad_data.ad_group->grp_mb_list]];
        }
    }
    return addressSet;
}


- (struct mailimf_address_list *)_IMFAddressListFromAddresssList:(NSSet *)addresses {
    struct mailimf_address_list *imfList = mailimf_address_list_new_empty();

    NSEnumerator *objEnum = [addresses objectEnumerator];
    CTCoreAddress *address;
    int err;
    const char *addressName;
    const char *addressEmail;

    while((address = [objEnum nextObject])) {
        addressName = [[address name] cStringUsingEncoding:NSUTF8StringEncoding];
        addressEmail = [[address email] cStringUsingEncoding:NSUTF8StringEncoding];
        err =  mailimf_address_list_add_mb(imfList, strdup(addressName), strdup(addressEmail));
        assert(err == 0);
    }
    return imfList;
}

@end