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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* camelMimeMessage.c : class for a mime_message */


/* 
 *
 * Copyright (C) 1999 Bertrand Guiheneuf <Bertrand.Guiheneuf@inria.fr> .
 *
 * This program is free software; you can redistribute it and/or 
 * modify it under the terms of the GNU General Public License as 
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */

#include "camel-mime-message.h"
#include <stdio.h>
#include "gmime-content-field.h"
#include "gstring-util.h"



static CamelMimePartClass *parent_class=NULL;

static GString *received_date_str;
static GString *sent_date_str;
static GString *reply_to_str;
static GString *subject_str;
static GString *from_str;

static void _set_received_date (CamelMimeMessage *mime_message, GString *received_date);
static GString *_get_received_date (CamelMimeMessage *mime_message);
static GString *_get_sent_date (CamelMimeMessage *mime_message);
static void _set_reply_to (CamelMimeMessage *mime_message, GString *reply_to);
static GString *_get_reply_to (CamelMimeMessage *mime_message);
static void _set_subject (CamelMimeMessage *mime_message, GString *subject);
static GString *_get_subject (CamelMimeMessage *mime_message);
static void _set_from (CamelMimeMessage *mime_message, GString *from);
static GString *_get_from (CamelMimeMessage *mime_message);

static void _add_recipient (CamelMimeMessage *mime_message, GString *recipient_type, GString *recipient); 
static void _remove_recipient (CamelMimeMessage *mime_message, GString *recipient_type, GString *recipient);
static GList *_get_recipients (CamelMimeMessage *mime_message, GString *recipient_type);

static void _set_flag (CamelMimeMessage *mime_message, GString *flag, gboolean value);
static gboolean _get_flag (CamelMimeMessage *mime_message, GString *flag);

static void _set_message_number (CamelMimeMessage *mime_message, guint number);
static guint _get_message_number (CamelMimeMessage *mime_message);

static void _write_to_file(CamelDataWrapper *data_wrapper, FILE *file);

/* Returns the class for a CamelMimeMessage */
#define CMM_CLASS(so) CAMEL_MIME_MESSAGE_CLASS (GTK_OBJECT(so)->klass)
#define CDW_CLASS(so) CAMEL_DATA_WRAPPER_CLASS (GTK_OBJECT(so)->klass)



static void
camel_mime_message_class_init (CamelMimeMessageClass *camel_mime_message_class)
{
    CamelDataWrapperClass *camel_data_wrapper_class = CAMEL_DATA_WRAPPER_CLASS (camel_mime_message_class);
    CamelMimePartClass *camel_mime_part_class = CAMEL_MIME_PART_CLASS (camel_mime_message_class);

    parent_class = gtk_type_class (camel_mime_part_get_type ());

    received_date_str = g_string_new("");
    sent_date_str = g_string_new("");
    reply_to_str = g_string_new("Reply-To");
    subject_str = g_string_new("Subject");
    from_str = g_string_new("From");
    
    /* virtual method definition */
    camel_mime_message_class->set_received_date = _set_received_date;
    camel_mime_message_class->get_received_date = _get_received_date;
    camel_mime_message_class->get_sent_date = _get_sent_date;
    camel_mime_message_class->set_reply_to = _set_reply_to;
    camel_mime_message_class->get_reply_to = _get_reply_to;
    camel_mime_message_class->set_subject = _set_subject;
    camel_mime_message_class->get_subject = _get_subject;
    camel_mime_message_class->set_from = _set_from;
    camel_mime_message_class->get_from = _get_from;
    camel_mime_message_class->add_recipient = _add_recipient; 
    camel_mime_message_class->remove_recipient = _remove_recipient;
    camel_mime_message_class->get_recipients = _get_recipients;
    camel_mime_message_class->set_flag = _set_flag;
    camel_mime_message_class->get_flag = _get_flag;
    camel_mime_message_class->set_message_number = _set_message_number;
    camel_mime_message_class->get_message_number = _get_message_number;
    
    /* virtual method overload */
    camel_data_wrapper_class->write_to_file = _write_to_file;
}




static void
camel_mime_message_init (gpointer   object,  gpointer   klass)
{
    CamelMimeMessage *camel_mime_message = CAMEL_MIME_MESSAGE (object);

    camel_mime_message->recipients =  g_hash_table_new(g_string_hash, g_string_equal_for_hash);
    camel_mime_message->flags = g_hash_table_new(g_string_hash, g_string_equal_for_hash);
    
}





GtkType
camel_mime_message_get_type (void)
{
    static GtkType camel_mime_message_type = 0;
    
    if (!camel_mime_message_type)   {
        GtkTypeInfo camel_mime_message_info =   
        {
            "CamelMimeMessage",
            sizeof (CamelMimeMessage),
            sizeof (CamelMimeMessageClass),
            (GtkClassInitFunc) camel_mime_message_class_init,
            (GtkObjectInitFunc) camel_mime_message_init,
                /* reserved_1 */ NULL,
                /* reserved_2 */ NULL,
            (GtkClassInitFunc) NULL,
        };
        
        camel_mime_message_type = gtk_type_unique (camel_mime_part_get_type (), &camel_mime_message_info);
    }
    
    return camel_mime_message_type;
}



CamelMimeMessage *
camel_mime_message_new_with_session (CamelSession *session) 
{
    CamelMimeMessage *mime_message;
    mime_message = gtk_type_new (CAMEL_MIME_MESSAGE_TYPE);
    mime_message->session = session;
    return mime_message;
}




/* two utils func */

static void
_set_field (CamelMimeMessage *mime_message, GString *name, GString *value, GString **variable)
{
    if (variable) {
        if (*variable) g_string_free (*variable, FALSE);
        *variable = value;
    }
}

static GString *
_get_field (CamelMimeMessage *mime_message, GString *name, GString *variable)
{
    return variable;
}





static void
_set_received_date (CamelMimeMessage *mime_message, GString *received_date)
{
    _set_field (mime_message, received_date_str, received_date, &(mime_message->received_date));
}

void
camel_mime_message_set_received_date (CamelMimeMessage *mime_message, GString *received_date)
{
     CMM_CLASS (mime_message)->set_received_date (mime_message, received_date);
}


static GString *
_get_received_date (CamelMimeMessage *mime_message)
{
    return _get_field (mime_message, received_date_str, mime_message->received_date);
}

GString *
camel_mime_message_get_received_date (CamelMimeMessage *mime_message)
{
     return CMM_CLASS (mime_message)->get_received_date (mime_message);
}






static GString *
_get_sent_date (CamelMimeMessage *mime_message)
{
    return _get_field (mime_message, sent_date_str, mime_message->sent_date);
}

GString *
camel_mime_message_get_sent_date (CamelMimeMessage *mime_message)
{
     return CMM_CLASS (mime_message)->get_sent_date (mime_message);
}





static void
_set_reply_to (CamelMimeMessage *mime_message, GString *reply_to)
{
    _set_field (mime_message, reply_to_str, reply_to, &(mime_message->reply_to));
}

void
camel_mime_message_set_reply_to (CamelMimeMessage *mime_message, GString *reply_to)
{
     CMM_CLASS (mime_message)->set_reply_to (mime_message, reply_to);
}


static GString *
_get_reply_to (CamelMimeMessage *mime_message)
{
    return _get_field (mime_message, reply_to_str, mime_message->reply_to);
}

GString *
camel_mime_message_get_reply_to (CamelMimeMessage *mime_message)
{
     return CMM_CLASS (mime_message)->get_reply_to (mime_message);
}




static void
_set_subject (CamelMimeMessage *mime_message, GString *subject)
{
    _set_field (mime_message, subject_str, subject, &(mime_message->subject));
}

void
camel_mime_message_set_subject (CamelMimeMessage *mime_message, GString *subject)
{
     CMM_CLASS (mime_message)->set_subject (mime_message, subject);
}


static GString *
_get_subject (CamelMimeMessage *mime_message)
{
    return _get_field (mime_message, subject_str, mime_message->subject);
}

GString *
camel_mime_message_get_subject (CamelMimeMessage *mime_message)
{
     return CMM_CLASS (mime_message)->get_subject (mime_message);
}




static void
_set_from (CamelMimeMessage *mime_message, GString *from)
{
    _set_field (mime_message, from_str, from, &(mime_message->from));
}

void
camel_mime_message_set_from (CamelMimeMessage *mime_message, GString *from)
{
     CMM_CLASS (mime_message)->set_from (mime_message, from);
}


static GString *
_get_from (CamelMimeMessage *mime_message)
{
    return _get_field (mime_message, from_str, mime_message->from);
}

GString *
camel_mime_message_get_from (CamelMimeMessage *mime_message)
{
     return CMM_CLASS (mime_message)->get_from (mime_message);
}






static void
_add_recipient (CamelMimeMessage *mime_message, GString *recipient_type, GString *recipient) 
{
    /* be careful, recipient_type and recipient may be freed within this func */
    GList *recipients_list;
    GList *existent_list;

    /* see if there is already a list for this recipient type */
    existent_list = (GList *)g_hash_table_lookup (mime_message->recipients, recipient_type);

    /* if the recipient is already in this list, do nothing */
    if ( existent_list && g_list_find_custom (existent_list, (gpointer)recipient, g_string_equal_for_glist) ) {
        g_string_free (recipient_type, FALSE);
        g_string_free (recipient, FALSE);
        return;
    }
    /* append the new recipient to the recipient list
       if the existent_list is NULL, then a new GList is
       automagically created */ 
    recipients_list = g_list_append (existent_list, (gpointer)recipient);

    if (!existent_list) /* if there was no recipient of this type create the section */
        g_hash_table_insert (mime_message->recipients, recipient_type, recipients_list);
    else 
        g_string_free (recipient_type, FALSE);
}


/**
 * add_recipient:
 * @mime_message: 
 * @recipient_type: 
 * @recipient: 
 * 
 * Have to write the doc. IMPORTANT : @recipient_type and 
 * @recipient may be freed within this func
 **/
void
camel_mime_message_add_recipient (CamelMimeMessage *mime_message, GString *recipient_type, GString *recipient) 
{
     CMM_CLASS (mime_message)->add_recipient (mime_message, recipient_type, recipient);
}


/**
 * _remove_recipient: remove a recipient from the list of recipients
 * @mime_message: the message
 * @recipient_type: recipient type from which the recipient should be removed
 * @recipient: recipient to remove
 * 
 * Be careful, recipient and recipient_type are not freed. 
 * calling programns must free them themselves. They can free
 * them just after remove_recipient returns.
 **/
static void
_remove_recipient (CamelMimeMessage *mime_message, GString *recipient_type, GString *recipient) 
{
    GList *recipients_list;
    GList *new_recipients_list;
    GList *old_element;
    GString *old_recipient_type;
    
    /* if the recipient type section does not exist, do nothing */
    if (! g_hash_table_lookup_extended (mime_message->recipients, 
                        recipient_type, 
                        (gpointer)&(old_recipient_type),
                        (gpointer)&(recipients_list)) 
        ) return;
    
    /* look for the recipient to remove */
    old_element = g_list_find_custom (recipients_list, recipient, g_string_equal_for_hash);
    if (old_element) {
        /* if recipient exists, remove it */
        new_recipients_list =  g_list_remove_link (recipients_list, old_element);

        /* if glist head has changed, fix up hash table */
        if (new_recipients_list != recipients_list)
            g_hash_table_insert (mime_message->recipients, old_recipient_type, new_recipients_list);

        g_string_free( (GString *)(old_element->data), FALSE);
        g_list_free_1(old_element);
    }
}


void
camel_mime_message_remove_recipient (CamelMimeMessage *mime_message, GString *recipient_type, GString *recipient) 
{
     CMM_CLASS (mime_message)->remove_recipient (mime_message, recipient_type, recipient);
}




static GList *
_get_recipients (CamelMimeMessage *mime_message, GString *recipient_type)
{
    return (GList *)g_hash_table_lookup (mime_message->recipients, recipient_type);
}

GList *
camel_mime_message_get_recipients (CamelMimeMessage *mime_message, GString *recipient_type)
{
    return CMM_CLASS (mime_message)->get_recipients (mime_message, recipient_type);
}




static void
_set_flag (CamelMimeMessage *mime_message, GString *flag, gboolean value)
{
    GString old_flags;
    gboolean *ptr_value;
    if (! g_hash_table_lookup_extended (mime_message->flags, 
                        flag, 
                        (gpointer)&(old_flags),
                        (gpointer)&(ptr_value)) ) {
        
        ptr_value = g_new (gboolean, 1);
        g_hash_table_insert (mime_message->flags, flag, ptr_value);
    } else {
        g_string_free (flag, FALSE);
    }
    *ptr_value = value;
        
}

void
camel_mime_message_set_flag (CamelMimeMessage *mime_message, GString *flag, gboolean value)
{
    CMM_CLASS (mime_message)->set_flag (mime_message, flag, value);
}



static gboolean 
_get_flag (CamelMimeMessage *mime_message, GString *flag)
{
    gboolean *value;
    value = (gboolean *)g_hash_table_lookup (mime_message->flags, flag);
    return ( (value) && (*value));
}

gboolean 
camel_mime_message_get_flag (CamelMimeMessage *mime_message, GString *flag)
{
    return CMM_CLASS (mime_message)->get_flag (mime_message, flag);
}




static void 
_set_message_number (CamelMimeMessage *mime_message, guint number)
{
    mime_message->message_number = number;
}

static guint 
_get_message_number (CamelMimeMessage *mime_message)
{
    return mime_message->message_number;
}



guint
camel_mime_message_get_message_number (CamelMimeMessage *mime_message)
{
    return CMM_CLASS (mime_message)->get_message_number (mime_message);
}




#ifdef WHPTF
#warning : WHPTF is already defined !!!!!!
#endif
#define WHPTF gmime_write_header_pair_to_file

static void
_write_one_recipient_to_file (gpointer key, gpointer value, gpointer user_data)
{
    GString *recipient_type = (GString *)key;
    GList *recipients = (GList *)value;
    GString *current;
    FILE *file = (FILE *)user_data;

    if ( (recipient_type) && (recipient_type->str) && 
         (recipients) )
        {
            gboolean first;

            fprintf(file, "%s: ", recipient_type->str);
            first = TRUE;
            while (recipients) {
                current = (GString *)recipients->data;
                if ( (current) && (current->str) ) {
                    if (!first) fprintf(file, ", ");
                    else first = FALSE;
                    fprintf(file, "%s", current->str);
                }
                recipients = g_list_next(recipients);
                
            }
            fprintf(file, "\n");
        }
}

static void
_write_recipients_to_file (CamelMimeMessage *mime_message, FILE *file)
{
    g_hash_table_foreach (mime_message->recipients, _write_one_recipient_to_file, (gpointer)file);
}

static void
_write_to_file (CamelDataWrapper *data_wrapper, FILE *file)
{
    CamelMimeMessage *mm = CAMEL_MIME_MESSAGE (data_wrapper);
    
    WHPTF (file, "From", mm->from);
    WHPTF (file, "Reply-To", mm->reply_to);
    _write_recipients_to_file (mm, file);
    WHPTF (file, "Date", mm->received_date);
    WHPTF (file, "Subject", mm->subject);
    CAMEL_DATA_WRAPPER_CLASS (parent_class)->write_to_file (data_wrapper, file);
    
}