path: root/mail/mail-ops.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* mail-ops.c: callbacks for the mail toolbar/menus */

/* 
 * Author : 
 *  Dan Winship <danw@helixcode.com>
 *  Peter Williams <peterw@helixcode.com>
 *
 * Copyright 2000 Helix Code, Inc. (http://www.helixcode.com)
 *
 * 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 <config.h>
#include <gnome.h>
#include <ctype.h>
#include "mail.h"
#include "mail-threads.h"
#include "mail-tools.h"
#include "mail-ops.h"
#include "composer/e-msg-composer.h"

/* ** FETCH MAIL ********************************************************** */

typedef struct fetch_mail_input_s
{
    gchar *source_url;
    gboolean keep_on_server;
    CamelFolder *destination;
    gpointer hook_func;
    gpointer hook_data;
}
fetch_mail_input_t;

typedef struct fetch_mail_data_s {
    gboolean empty;
} fetch_mail_data_t;

static gchar *describe_fetch_mail (gpointer in_data, gboolean gerund);
static void setup_fetch_mail (gpointer in_data, gpointer op_data,
                  CamelException *ex);
static void do_fetch_mail (gpointer in_data, gpointer op_data,
               CamelException *ex);
static void cleanup_fetch_mail (gpointer in_data, gpointer op_data,
                CamelException *ex);

static gchar *
describe_fetch_mail (gpointer in_data, gboolean gerund)
{
    fetch_mail_input_t *input = (fetch_mail_input_t *) in_data;
    char *name;

    /*source = camel_session_get_store (session, input->source_url, NULL);
     *if (source) {
     *  name = camel_service_get_name (CAMEL_SERVICE (source), FALSE);
     *  camel_object_unref (CAMEL_OBJECT (source));
     *} else
     */
        name = input->source_url;

    if (gerund)
        return g_strdup_printf (_("Fetching email from %s"), name);
    else
        return g_strdup_printf (_("Fetch email from %s"), name);
}

static void
setup_fetch_mail (gpointer in_data, gpointer op_data, CamelException *ex)
{
    fetch_mail_input_t *input = (fetch_mail_input_t *) in_data;
    fetch_mail_data_t *data = (fetch_mail_data_t *) op_data;

    if (!input->source_url) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     _("You have no remote mail source configured "
                     "to fetch mail from."));
        return;
    }

    if (input->destination == NULL)
        return;

    if (!CAMEL_IS_FOLDER (input->destination)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     _("Bad folder passed to fetch_mail"));
        return;
    }

    data->empty = FALSE;
    camel_object_ref (CAMEL_OBJECT (input->destination));
}

static void
do_fetch_mail (gpointer in_data, gpointer op_data, CamelException *ex)
{
    fetch_mail_input_t *input = (fetch_mail_input_t *) in_data;
    fetch_mail_data_t *data = (fetch_mail_data_t *) op_data;
    CamelFolder *folder = NULL;
    
    /* If using IMAP, don't do anything... */
    if (!strncmp (input->source_url, "imap:", 5)) {
        data->empty = FALSE;
        return;
    }
    
    if (input->destination == NULL) {
        input->destination = mail_tool_get_local_inbox (ex);
        
        if (input->destination == NULL)
            return;
    }
    
    if (!strncmp (input->source_url, "mbox:", 5))
        folder = mail_tool_do_movemail (input->source_url, ex);
    else
        folder = mail_tool_get_inbox (input->source_url, ex);
    
    if (folder == NULL) {
        /* This happens with an IMAP source and on error 
         * and on "no new mail"
         */
        camel_object_unref (CAMEL_OBJECT (input->destination));
        input->destination = NULL;
        data->empty = TRUE;
        return;
    }
    
    mail_tool_camel_lock_up ();
    if (camel_folder_get_message_count (folder) == 0) {
        data->empty = TRUE;
    } else {
        CamelUIDCache *cache = NULL;
        gchar *userrules;
        gchar *systemrules;
        FilterContext *fc;
        FilterDriver *filter;
        GPtrArray *uids, *new_uids;
        char *url, *p, *filename;
        int i;
        
        userrules = g_strdup_printf ("%s/filters.xml", evolution_dir);
        systemrules = g_strdup_printf ("%s/evolution/filtertypes.xml", EVOLUTION_DATADIR);
        fc = filter_context_new ();
        rule_context_load ((RuleContext *)fc, systemrules, userrules, NULL, NULL);
        g_free (userrules);
        g_free (systemrules);
        
        filter = filter_driver_new (fc, mail_tool_filter_get_folder_func, 0);
        
        if (input->hook_func)
            camel_object_hook_event (CAMEL_OBJECT (input->destination), "folder_changed",
                         input->hook_func, input->hook_data);
        
        camel_folder_freeze (input->destination);
        
        uids = camel_folder_get_uids (folder);
        
        if (!input->keep_on_server) {
            /* get the mail source's uid cache file */
            url = camel_url_to_string (CAMEL_SERVICE (folder->parent_store)->url, FALSE);
            for (p = url; *p; p++) {
                if (!isascii ((unsigned char)*p) || strchr (" /'\"`&();|<>${}!", *p))
                    *p = '_';
            }
            
            filename = g_strdup_printf ("%s/config/cache-%s", evolution_dir, url);
            g_free (url);
            
            cache = camel_uid_cache_new (filename);
            
            if (cache) {
                /* determine the new uids */
                new_uids = camel_uid_cache_get_new_uids (cache, uids);
                camel_folder_free_uids (folder, uids);
                uids = new_uids;
            }
        }
        
        /* get/filter the new messages */
        for (i = 0; i < uids->len; i++) {
            CamelMimeMessage *message;
            CamelMessageInfo *info;
            gboolean free_info;
            
            mail_op_set_message ("Retrieving message %d of %d", i + 1, uids->len);
            
            message = camel_folder_get_message (folder, uids->pdata[i], ex);
            if (camel_exception_is_set (ex))
                continue;
            
            if (camel_folder_has_summary_capability (folder)) {
                info = (CamelMessageInfo *) camel_folder_get_message_info (folder, uids->pdata[i]);
                free_info = FALSE;
            } else {
                info = g_new0 (CamelMessageInfo, 1);
                free_info = TRUE;
            }
            
            filter_driver_run (filter, message, info, input->destination,
                       FILTER_SOURCE_INCOMING, ex);
            
            if (free_info)
                camel_message_info_free (info);
            
            /* we don't care if it was filtered or not here because no matter
               what it's been copied to at least 1 folder - even if it's just
               the default (assuming we didn't get an exception) */
            if (!input->keep_on_server && !camel_exception_is_set (ex)) {
                guint32 flags;
                
                flags = camel_folder_get_message_flags (folder, uids->pdata[i]);
                camel_folder_set_message_flags (folder, uids->pdata[i],
                                CAMEL_MESSAGE_DELETED,
                                ~flags);
            }
            camel_object_unref (CAMEL_OBJECT (message));
        }
        
        gtk_object_unref (GTK_OBJECT (filter));
        
        camel_folder_sync (folder, FALSE, ex);
        
        camel_folder_thaw (input->destination);
        
        if (input->hook_func)
            camel_object_unhook_event (CAMEL_OBJECT (input->destination), "folder_changed", 
                           input->hook_func, input->hook_data);
        
        if (cache) {
            /* save the cache for the next time we fetch mail! */
            camel_uid_cache_free_uids (uids);
            
            if (!camel_exception_is_set (ex))
                camel_uid_cache_save (cache);
            camel_uid_cache_destroy (cache);
        } else
            camel_folder_free_uids (folder, uids);
        
        data->empty = FALSE;
    }
    mail_tool_camel_lock_down ();
    
    camel_object_unref (CAMEL_OBJECT (folder));
}

static void
cleanup_fetch_mail (gpointer in_data, gpointer op_data, CamelException *ex)
{
    fetch_mail_input_t *input = (fetch_mail_input_t *) in_data;
    fetch_mail_data_t *data = (fetch_mail_data_t *) op_data;

    if (data->empty && !camel_exception_is_set (ex)) {
        GtkWidget *dialog;
        gchar *str;

        str = g_strdup_printf (_("There is no new mail at %s."),
                       input->source_url);
        dialog = gnome_ok_dialog (str);
        g_free (str);
        gnome_dialog_run_and_close (GNOME_DIALOG (dialog));
    }

    g_free (input->source_url);
    if (input->destination)
        camel_object_unref (CAMEL_OBJECT (input->destination));
}

static const mail_operation_spec op_fetch_mail = {
    describe_fetch_mail,
    sizeof (fetch_mail_data_t),
    setup_fetch_mail,
    do_fetch_mail,
    cleanup_fetch_mail
};

void
mail_do_fetch_mail (const gchar *source_url, gboolean keep_on_server,
            CamelFolder *destination,
            gpointer hook_func, gpointer hook_data)
{
    fetch_mail_input_t *input;
    
    input = g_new (fetch_mail_input_t, 1);
    input->source_url = g_strdup (source_url);
    input->keep_on_server = keep_on_server;
    input->destination = destination;
    input->hook_func = hook_func;
    input->hook_data = hook_data;
    
    mail_operation_queue (&op_fetch_mail, input, TRUE);
}

/* ** FILTER ON DEMAND ********************************************************** */

typedef struct filter_ondemand_input_s
{
    FilterContext *context;
    CamelFolder *source;
    CamelFolder *destination;
} filter_ondemand_input_t;

typedef struct filter_ondemand_data_s {
    gboolean empty;
} filter_ondemand_data_t;

static gchar *describe_filter_ondemand (gpointer in_data, gboolean gerund);
static void setup_filter_ondemand (gpointer in_data, gpointer op_data,
                   CamelException *ex);
static void do_filter_ondemand (gpointer in_data, gpointer op_data,
                CamelException *ex);
static void cleanup_filter_ondemand (gpointer in_data, gpointer op_data,
                     CamelException *ex);

static gchar *
describe_filter_ondemand (gpointer in_data, gboolean gerund)
{
    /*filter_ondemand_input_t *input = (filter_ondemand_input_t *) in_data;*/
    
    if (gerund)
        return g_strdup_printf (_("Filtering email on demand"));
    else
        return g_strdup_printf (_("Filter email on demand"));
}

static void
setup_filter_ondemand (gpointer in_data, gpointer op_data, CamelException *ex)
{
    filter_ondemand_input_t *input = (filter_ondemand_input_t *) in_data;
    filter_ondemand_data_t *data = (filter_ondemand_data_t *) op_data;
    
    if (!IS_FILTER_CONTEXT (input->context)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     _("Bad filter context specified"));
        return;
    }
    
    if (input->source == NULL)
        return;
    
    if (!CAMEL_IS_FOLDER (input->source)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     _("Bad input source defined for filtering"));
        return;
    }
    
    if (input->destination == NULL)
        return;
    
    if (!CAMEL_IS_FOLDER (input->destination)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     _("Bad default destination folder"));
        return;
    }
    
    data->empty = FALSE;
    
    gtk_object_ref (GTK_OBJECT (input->context));
    camel_object_ref (CAMEL_OBJECT (input->source));
    camel_object_ref (CAMEL_OBJECT (input->destination));
}

static void
do_filter_ondemand (gpointer in_data, gpointer op_data, CamelException *ex)
{
    filter_ondemand_input_t *input = (filter_ondemand_input_t *) in_data;
    filter_ondemand_data_t *data = (filter_ondemand_data_t *) op_data;
    
    mail_tool_camel_lock_up ();
    if (camel_folder_get_message_count (input->source) == 0) {
        data->empty = TRUE;
    } else {
        FilterDriver *driver;
        GPtrArray *uids;
        int i;
        
        uids = camel_folder_get_uids (input->source);
        
        camel_folder_freeze (input->source);
        
        driver = filter_driver_new (input->context, mail_tool_filter_get_folder_func, NULL);
        
        for (i = 0; i < uids->len; i++) {
            CamelMimeMessage *message;
            CamelMessageInfo *info;
            gboolean filtered;
            gboolean free_info;
            
            message = camel_folder_get_message (input->source, uids->pdata[i], ex);
            if (camel_exception_is_set (ex))
                continue;
            
            if (camel_folder_has_summary_capability (input->source)) {
                info = (CamelMessageInfo *) camel_folder_get_message_info (input->source, uids->pdata[i]);
                free_info = FALSE;
            } else {
                info = g_new0 (CamelMessageInfo, 1);
                free_info = TRUE;
            }
            
            filtered = filter_driver_run (driver, message, info, NULL,
                              FILTER_SOURCE_DEMAND, ex);
            
            if (free_info)
                camel_message_info_free (info);
            
            if (filtered && !camel_exception_is_set (ex)) {
                /* we can delete this since it's been filtered */
                guint32 flags;
                
                flags = camel_folder_get_message_flags (input->source, uids->pdata[i]);
                camel_folder_set_message_flags (input->source, uids->pdata[i],
                                CAMEL_MESSAGE_DELETED,
                                ~flags);
            }
            
            camel_object_unref (CAMEL_OBJECT (message));
        }
        
        gtk_object_unref (GTK_OBJECT (driver));
        
        /* FIXME: when we hide deleted msgs, we may want to not expunge? */
        camel_folder_sync (input->source, TRUE, ex);
        
        camel_folder_thaw (input->source);
        
        camel_folder_free_uids (input->source, uids);
        
        data->empty = FALSE;
    }
    mail_tool_camel_lock_down ();
}

static void
cleanup_filter_ondemand (gpointer in_data, gpointer op_data, CamelException *ex)
{
    filter_ondemand_input_t *input = (filter_ondemand_input_t *) in_data;
    /*filter_ondemand_data_t *data = (filter_ondemand_data_t *) op_data;*/
    
    if (input->source)
        camel_object_unref (CAMEL_OBJECT (input->source));
    
    if (input->destination)
        camel_object_unref (CAMEL_OBJECT (input->destination));
    
    if (input->context)
        gtk_object_unref (GTK_OBJECT (input->context));
}

static const mail_operation_spec op_filter_ondemand = {
    describe_filter_ondemand,
    sizeof (filter_ondemand_data_t),
    setup_filter_ondemand,
    do_filter_ondemand,
    cleanup_filter_ondemand
};

void
mail_do_filter_ondemand (FilterContext *context, CamelFolder *source, CamelFolder *destination)
{
    filter_ondemand_input_t *input;
    
    input = g_new (filter_ondemand_input_t, 1);
    input->context = context;
    input->source = source;
    input->destination = destination;
    
    mail_operation_queue (&op_filter_ondemand, input, TRUE);
}

/* ** SEND MAIL *********************************************************** */

typedef struct send_mail_input_s
{
    gchar *xport_uri;
    CamelMimeMessage *message;

    /* If done_folder != NULL, will add done_flags to
     * the flags of the message done_uid in done_folder. */

    CamelFolder *done_folder;
    char *done_uid;
    guint32 done_flags;

    GtkWidget *composer;
}
send_mail_input_t;

static gchar *describe_send_mail (gpointer in_data, gboolean gerund);
static void setup_send_mail (gpointer in_data, gpointer op_data,
                 CamelException *ex);
static void do_send_mail (gpointer in_data, gpointer op_data,

              CamelException *ex);
static void cleanup_send_mail (gpointer in_data, gpointer op_data,
                   CamelException *ex);

static gchar *
describe_send_mail (gpointer in_data, gboolean gerund)
{
    send_mail_input_t *input = (send_mail_input_t *) in_data;

    if (gerund) {
        if (input->message->subject && input->message->subject[0])
            return g_strdup_printf (_("Sending \"%s\""),
                        input->message->subject);
        else
            return
                g_strdup
                (_("Sending a message without a subject"));
    } else {
        if (input->message->subject && input->message->subject[0])
            return g_strdup_printf (_("Send \"%s\""),
                        input->message->subject);
        else
            return g_strdup (_("Send a message without a subject"));
    }
}

static void
setup_send_mail (gpointer in_data, gpointer op_data, CamelException *ex)
{
    send_mail_input_t *input = (send_mail_input_t *) in_data;
    
    if (!input->xport_uri) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     /* doesn't really need i18n */
                     "No transport URI specified for send_mail operation.");
        return;
    }
    
    if (!CAMEL_IS_MIME_MESSAGE (input->message)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "No message specified for send_mail operation.");
        return;
    }
    
    /* NOTE THE EARLY EXIT!! */
    
    if (input->done_folder == NULL) {
        camel_object_ref (CAMEL_OBJECT (input->message));
        if (input->composer) {
            gtk_object_ref (GTK_OBJECT (input->composer));
            gtk_widget_hide (GTK_WIDGET (input->composer));
        }
        return;
    }
    
    if (!CAMEL_IS_FOLDER (input->done_folder)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "Bad done_folder specified for send_mail operation.");
        return;
    }
    
    if (input->done_uid == NULL) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "No done_uid specified for send_mail operation.");
        return;
    }
    
    camel_object_ref (CAMEL_OBJECT (input->message));
    camel_object_ref (CAMEL_OBJECT (input->done_folder));
    
    if (input->composer) {
        gtk_object_ref (GTK_OBJECT (input->composer));
        gtk_widget_hide (GTK_WIDGET (input->composer));
    }
}

static void
do_send_mail (gpointer in_data, gpointer op_data, CamelException *ex)
{
    send_mail_input_t *input = (send_mail_input_t *) in_data;
    extern CamelFolder *sent_folder;
    CamelTransport *xport;
    char *x_mailer;
    
    mail_tool_camel_lock_up ();
    x_mailer = g_strdup_printf ("Evolution %s (Developer Preview)",
                    VERSION);
    camel_medium_add_header (CAMEL_MEDIUM (input->message), "X-Mailer",
                 x_mailer);
    g_free (x_mailer);
    camel_mime_message_set_date (input->message,
                     CAMEL_MESSAGE_DATE_CURRENT, 0);
    
    xport = camel_session_get_transport (session, input->xport_uri, ex);
    mail_tool_camel_lock_down ();
    if (camel_exception_is_set (ex))
        return;
    
    mail_tool_send_via_transport (xport, CAMEL_MEDIUM (input->message), ex);
    camel_object_unref (CAMEL_OBJECT (xport));
    
    if (camel_exception_is_set (ex))
        return;
    
    /* if we replied to a message, mark the appropriate flags and stuff */
    if (input->done_folder) {
        guint32 set;
        
        mail_tool_camel_lock_up ();
        set = camel_folder_get_message_flags (input->done_folder,
                              input->done_uid);
        camel_folder_set_message_flags (input->done_folder,
                        input->done_uid,
                        input->done_flags, ~set);
        mail_tool_camel_lock_down ();
    }
    
    /* now to save the message in Sent */
    if (sent_folder) {
        CamelMessageInfo *info;
        
        mail_tool_camel_lock_up ();
        
        info = g_new0 (CamelMessageInfo, 1);
        info->flags = 0;
        camel_folder_append_message (sent_folder, input->message, info, ex);
        g_free (info);
        
        mail_tool_camel_lock_down ();
    }
}

static void
cleanup_send_mail (gpointer in_data, gpointer op_data, CamelException *ex)
{
    send_mail_input_t *input = (send_mail_input_t *) in_data;
    
    camel_object_unref (CAMEL_OBJECT (input->message));
    if (input->done_folder)
        camel_object_unref (CAMEL_OBJECT (input->done_folder));
    
    g_free (input->xport_uri);
    g_free (input->done_uid);
    
    if (input->composer) {
        if (!camel_exception_is_set (ex))
            gtk_widget_destroy (input->composer);
        else
            gtk_widget_show (input->composer);
    }
}

static const mail_operation_spec op_send_mail = {
    describe_send_mail,
    0,
    setup_send_mail,
    do_send_mail,
    cleanup_send_mail
};

void
mail_do_send_mail (const char *xport_uri,
           CamelMimeMessage *message,
           CamelFolder *done_folder,
           const char *done_uid,
           guint32 done_flags, GtkWidget *composer)
{
    send_mail_input_t *input;
    
    input = g_new (send_mail_input_t, 1);
    input->xport_uri = g_strdup (xport_uri);
    input->message = message;
    input->done_folder = done_folder;
    input->done_uid = g_strdup (done_uid);
    input->done_flags = done_flags;
    input->composer = composer;
    
    mail_operation_queue (&op_send_mail, input, TRUE);
}

/* ** SEND MAIL QUEUE ***************************************************** */

typedef struct send_queue_input_s
{
    CamelFolder *folder_queue;
    gchar *xport_uri;
}
send_queue_input_t;

static gchar *describe_send_queue (gpointer in_data, gboolean gerund);
static void setup_send_queue (gpointer in_data, gpointer op_data,
                  CamelException *ex);
static void do_send_queue (gpointer in_data, gpointer op_data,
               CamelException *ex);
static void cleanup_send_queue (gpointer in_data, gpointer op_data,
                CamelException *ex);

static gchar *
describe_send_queue (gpointer in_data, gboolean gerund)
{
    /*send_queue_input_t *input = (send_queue_input_t *) in_data;*/
    
    if (gerund) {
        return g_strdup_printf (_("Sending queue"));
    } else {
        return g_strdup_printf (_("Send queue"));
    }
}

static void
setup_send_queue (gpointer in_data, gpointer op_data, CamelException *ex)
{
    send_queue_input_t *input = (send_queue_input_t *) in_data;
    
    if (!input->xport_uri) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     /* doesn't really need i18n */
                     "No transport URI specified for send_queue operation.");
        return;
    }
    
    if (!CAMEL_IS_FOLDER (input->folder_queue)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "No queue specified for send_queue operation.");
        return;
    }
    
    camel_object_ref (CAMEL_OBJECT (input->folder_queue));
}

static void
do_send_queue (gpointer in_data, gpointer op_data, CamelException *ex)
{
    send_queue_input_t *input = (send_queue_input_t *) in_data;
    extern CamelFolder *sent_folder;
    CamelTransport *xport;
    GPtrArray *uids;
    char *x_mailer;
    guint32 set;
    int i;
    
    uids = camel_folder_get_uids (input->folder_queue);
    if (!uids)
        return;
    
    x_mailer = g_strdup_printf ("Evolution %s (Developer Preview)",
                    VERSION);
    
    for (i = 0; i < uids->len; i++) {
        CamelMimeMessage *message;
        
        mail_tool_camel_lock_up ();
        
        message = camel_folder_get_message (input->folder_queue, uids->pdata[i], ex);
        if (camel_exception_is_set (ex))
            break;
        
        camel_medium_add_header (CAMEL_MEDIUM (message), "X-Mailer", x_mailer);
        
        camel_mime_message_set_date (message, CAMEL_MESSAGE_DATE_CURRENT, 0);
        
        xport = camel_session_get_transport (session, input->xport_uri, ex);
        mail_tool_camel_lock_down ();
        if (camel_exception_is_set (ex))
            break;
        
        mail_tool_send_via_transport (xport, CAMEL_MEDIUM (message), ex);
        camel_object_unref (CAMEL_OBJECT (xport));
        
        if (camel_exception_is_set (ex))
            break;
        
        mail_tool_camel_lock_up ();
        set = camel_folder_get_message_flags (input->folder_queue,
                              uids->pdata[i]);
        camel_folder_set_message_flags (input->folder_queue,
                        uids->pdata[i],
                        CAMEL_MESSAGE_DELETED, ~set);
        mail_tool_camel_lock_down ();
        
        /* now to save the message in Sent */
        if (sent_folder) {
            CamelMessageInfo *info;
            
            mail_tool_camel_lock_up ();
            
            info = g_new0 (CamelMessageInfo, 1);
            info->flags = 0;
            camel_folder_append_message (sent_folder, message, info, ex);
            g_free (info);
            
            mail_tool_camel_lock_down ();
        }
    }
    
    g_free (x_mailer);
    
    for (i = 0; i < uids->len; i++)
        g_free (uids->pdata[i]);
    g_ptr_array_free (uids, TRUE);
}

static void
cleanup_send_queue (gpointer in_data, gpointer op_data, CamelException *ex)
{
    send_queue_input_t *input = (send_queue_input_t *) in_data;
    
    camel_object_unref (CAMEL_OBJECT (input->folder_queue));
    
    g_free (input->xport_uri);
}

static const mail_operation_spec op_send_queue = {
    describe_send_queue,
    0,
    setup_send_queue,
    do_send_queue,
    cleanup_send_queue
};

void
mail_do_send_queue (CamelFolder *folder_queue,
            const char *xport_uri)
{
    send_queue_input_t *input;
    
    input = g_new (send_queue_input_t, 1);
    input->xport_uri = g_strdup (xport_uri);
    input->folder_queue = folder_queue;
    
    mail_operation_queue (&op_send_queue, input, TRUE);
}


/* ** APPEND MESSAGE TO FOLDER ******************************************** */

typedef struct append_mail_input_s
{
        CamelFolder *folder;
    CamelMimeMessage *message;
        CamelMessageInfo *info;
}
append_mail_input_t;

static gchar *describe_append_mail (gpointer in_data, gboolean gerund);
static void setup_append_mail (gpointer in_data, gpointer op_data,
                   CamelException *ex);
static void do_append_mail (gpointer in_data, gpointer op_data,
                CamelException *ex);
static void cleanup_append_mail (gpointer in_data, gpointer op_data,
                 CamelException *ex);

static gchar *
describe_append_mail (gpointer in_data, gboolean gerund)
{
    append_mail_input_t *input = (append_mail_input_t *) in_data;
    
    if (gerund) {
        if (input->message->subject && input->message->subject[0])
            return g_strdup_printf (_("Appending \"%s\""),
                        input->message->subject);
        else
            return
                g_strdup (_("Appending a message without a subject"));
    } else {
        if (input->message->subject && input->message->subject[0])
            return g_strdup_printf (_("Appending \"%s\""),
                        input->message->subject);
        else
            return g_strdup (_("Appending a message without a subject"));
    }
}

static void
setup_append_mail (gpointer in_data, gpointer op_data, CamelException *ex)
{
    append_mail_input_t *input = (append_mail_input_t *) in_data;
    
    if (!CAMEL_IS_MIME_MESSAGE (input->message)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "No message specified for append_mail operation.");
        return;
    }
    
    if (!CAMEL_IS_FOLDER (input->folder)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "Bad done_folder specified for append_mail operation.");
        return;
    }
    
    camel_object_ref (CAMEL_OBJECT (input->message));
    camel_object_ref (CAMEL_OBJECT (input->folder));
}

static void
do_append_mail (gpointer in_data, gpointer op_data, CamelException *ex)
{
    append_mail_input_t *input = (append_mail_input_t *) in_data;
    
    camel_mime_message_set_date (input->message,
                     CAMEL_MESSAGE_DATE_CURRENT, 0);
    
        mail_tool_camel_lock_up ();
    
    /* now to save the message in the specified folder */
    camel_folder_append_message (input->folder, input->message, input->info, ex);
    
        mail_tool_camel_lock_down ();
}

static void
cleanup_append_mail (gpointer in_data, gpointer op_data, CamelException *ex)
{
    append_mail_input_t *input = (append_mail_input_t *) in_data;
    
    camel_object_unref (CAMEL_OBJECT (input->message));
        camel_object_unref (CAMEL_OBJECT (input->folder));
}

static const mail_operation_spec op_append_mail = {
    describe_append_mail,
    0,
    setup_append_mail,
    do_append_mail,
    cleanup_append_mail
};

void
mail_do_append_mail (CamelFolder *folder,
             CamelMimeMessage *message,
             CamelMessageInfo *info)
{
    append_mail_input_t *input;
    
    input = g_new (append_mail_input_t, 1);
    input->folder = folder;
    input->message = message;
    input->info = info;
    
    mail_operation_queue (&op_append_mail, input, TRUE);
}

/* ** EXPUNGE FOLDER ****************************************************** */

static gchar *describe_expunge_folder (gpointer in_data, gboolean gerund);
static void setup_expunge_folder (gpointer in_data, gpointer op_data,
                  CamelException *ex);
static void do_expunge_folder (gpointer in_data, gpointer op_data,
                   CamelException *ex);
static void cleanup_expunge_folder (gpointer in_data, gpointer op_data,
                    CamelException *ex);

static gchar *
describe_expunge_folder (gpointer in_data, gboolean gerund)
{
    CamelFolder *f = CAMEL_FOLDER (in_data);

    if (gerund)
        return g_strdup_printf (_("Expunging \"%s\""), mail_tool_get_folder_name (f));
    else
        return g_strdup_printf (_("Expunge \"%s\""), mail_tool_get_folder_name (f));
}

static void
setup_expunge_folder (gpointer in_data, gpointer op_data, CamelException *ex)
{
    if (!CAMEL_IS_FOLDER (in_data)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     /* doesn't need i18n */
                     "No folder is selected to be expunged");
        return;
    }

    camel_object_ref (CAMEL_OBJECT (in_data));
}

static void
do_expunge_folder (gpointer in_data, gpointer op_data, CamelException *ex)
{
    mail_tool_camel_lock_up ();
    camel_folder_expunge (CAMEL_FOLDER (in_data), ex);
    mail_tool_camel_lock_down ();
}

static void
cleanup_expunge_folder (gpointer in_data, gpointer op_data,
            CamelException *ex)
{
    camel_object_unref (CAMEL_OBJECT (in_data));
}

static const mail_operation_spec op_expunge_folder = {
    describe_expunge_folder,
    0,
    setup_expunge_folder,
    do_expunge_folder,
    cleanup_expunge_folder
};

void
mail_do_expunge_folder (CamelFolder *folder)
{
    mail_operation_queue (&op_expunge_folder, folder, FALSE);
}

/* ** TRANSFER MESSAGES **************************************************** */

typedef struct transfer_messages_input_s
{
    CamelFolder *source;
    GPtrArray *uids;
    gboolean delete_from_source;
    gchar *dest_uri;
}
transfer_messages_input_t;

static gchar *describe_transfer_messages (gpointer in_data, gboolean gerund);
static void setup_transfer_messages (gpointer in_data, gpointer op_data,
                   CamelException *ex);
static void do_transfer_messages (gpointer in_data, gpointer op_data,
                CamelException *ex);
static void cleanup_transfer_messages (gpointer in_data, gpointer op_data,
                     CamelException *ex);

static gchar *
describe_transfer_messages (gpointer in_data, gboolean gerund)
{
    transfer_messages_input_t *input = (transfer_messages_input_t *) in_data;
    char *format;
    
    if (gerund) {
        if (input->delete_from_source)
            format = _("Moving messages from \"%s\" into \"%s\"");
        else
            format = _("Copying messages from \"%s\" into \"%s\"");
    } else {
        if (input->delete_from_source)
            format = _("Move messages from \"%s\" into \"%s\"");
        else
            format = _("Copy messages from \"%s\" into \"%s\"");
    }

    return g_strdup_printf (format,
                mail_tool_get_folder_name (input->source), 
                input->dest_uri);
}

static void
setup_transfer_messages (gpointer in_data, gpointer op_data,
               CamelException *ex)
{
    transfer_messages_input_t *input = (transfer_messages_input_t *) in_data;
    char *verb;

    if (input->delete_from_source)
        /* don't need i18n */
        verb = "move";
    else
        verb = "copy";

    if (!CAMEL_IS_FOLDER (input->source)) {
        camel_exception_setv (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "No source folder to %s messages from specified.",
                      verb);
        return;
    }

    if (input->uids == NULL) {
        camel_exception_setv (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "No messages to %s have been specified.",
                     verb);
        return;
    }

    if (input->dest_uri == NULL) {
        camel_exception_setv (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "No URI to %s to has been specified.",
                     verb);
        return;
    }

    camel_object_ref (CAMEL_OBJECT (input->source));
}

static void
do_transfer_messages (gpointer in_data, gpointer op_data, CamelException *ex)
{
    transfer_messages_input_t *input = (transfer_messages_input_t *) in_data;
    CamelFolder *dest;
    gint i;
    gchar *desc;
    void (*func) (CamelFolder *, const char *, 
              CamelFolder *, 
              CamelException *);

    if (input->delete_from_source) {
        func = camel_folder_move_message_to;
        desc = _("Moving");
    } else {
        func = camel_folder_copy_message_to;
        desc = _("Copying");
    }

    dest = mail_tool_uri_to_folder (input->dest_uri, ex);
    if (camel_exception_is_set (ex))
        return;

    mail_tool_camel_lock_up ();
    camel_folder_freeze (input->source);
    camel_folder_freeze (dest);

    for (i = 0; i < input->uids->len; i++) {
        mail_op_set_message (_("%s message %d of %d (uid \"%s\")"), desc,
                     i + 1, input->uids->len, (char *) input->uids->pdata[i]);

        (func) (input->source,
            input->uids->pdata[i], dest,
            ex);
        g_free (input->uids->pdata[i]);
        if (camel_exception_is_set (ex))
            break;
    }

    camel_folder_thaw (input->source);
    camel_folder_thaw (dest);
    camel_object_unref (CAMEL_OBJECT (dest));
    mail_tool_camel_lock_down ();
}

static void
cleanup_transfer_messages (gpointer in_data, gpointer op_data,
             CamelException *ex)
{
    transfer_messages_input_t *input = (transfer_messages_input_t *) in_data;

    camel_object_unref (CAMEL_OBJECT (input->source));
    g_free (input->dest_uri);
    g_ptr_array_free (input->uids, TRUE);
}

static const mail_operation_spec op_transfer_messages = {
    describe_transfer_messages,
    0,
    setup_transfer_messages,
    do_transfer_messages,
    cleanup_transfer_messages
};

void
mail_do_transfer_messages (CamelFolder *source, GPtrArray *uids,
               gboolean delete_from_source,
               gchar *dest_uri)
{
    transfer_messages_input_t *input;

    input = g_new (transfer_messages_input_t, 1);
    input->source = source;
    input->uids = uids;
    input->delete_from_source = delete_from_source;
    input->dest_uri = g_strdup (dest_uri);

    mail_operation_queue (&op_transfer_messages, input, TRUE);
}

/* ** FLAG MESSAGES ******************************************************* */

typedef struct flag_messages_input_s
{
    CamelFolder *source;
    GPtrArray *uids;
    gboolean invert;
    guint32 mask;
    guint32 set;
    gboolean flag_all;
}
flag_messages_input_t;

static gchar *describe_flag_messages (gpointer in_data, gboolean gerund);
static void setup_flag_messages (gpointer in_data, gpointer op_data,
                 CamelException *ex);
static void do_flag_messages (gpointer in_data, gpointer op_data,
                  CamelException *ex);
static void cleanup_flag_messages (gpointer in_data, gpointer op_data,
                   CamelException *ex);

static gchar *
describe_flag_messages (gpointer in_data, gboolean gerund)
{
    flag_messages_input_t *input = (flag_messages_input_t *) in_data;

    /* FIXME: change based on flags being applied? */

    if (gerund)
        return g_strdup_printf (_("Marking messages in folder \"%s\""),
                    mail_tool_get_folder_name (input->source));
    else
        return g_strdup_printf (_("Mark messages in folder \"%s\""),
                    mail_tool_get_folder_name (input->source));
}

static void
setup_flag_messages (gpointer in_data, gpointer op_data, CamelException *ex)
{
    flag_messages_input_t *input = (flag_messages_input_t *) in_data;

    if (!CAMEL_IS_FOLDER (input->source)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     /* doesn't need i18n */
                     "No source folder to flag messages from specified.");
        return;
    }

    if (!input->flag_all && input->uids == NULL) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "No messages to flag have been specified.");
        return;
    }

    camel_object_ref (CAMEL_OBJECT (input->source));
}

static void
do_flag_messages (gpointer in_data, gpointer op_data, CamelException *ex)
{
    flag_messages_input_t *input = (flag_messages_input_t *) in_data;
    gint i;

    mail_tool_camel_lock_up ();
    camel_folder_freeze (input->source);
    if (input->uids == NULL) 
        input->uids = camel_folder_get_uids (input->source);
    mail_tool_camel_lock_down ();

    for (i = 0; i < input->uids->len; i++) {
        mail_op_set_message ("Marking message %d of %d", i + 1,
                     input->uids->len);

        if (input->invert) {
            const CamelMessageInfo *info;

            mail_tool_camel_lock_up ();
            info = camel_folder_get_message_info (input->source, input->uids->pdata[i]);
            camel_folder_set_message_flags (input->source, input->uids->pdata[i],
                            input->mask, ~info->flags);
            mail_tool_camel_lock_down ();
        } else {
            mail_tool_set_uid_flags (input->source, input->uids->pdata[i],
                         input->mask, input->set);
        }

        if (input->flag_all == FALSE)
            g_free (input->uids->pdata[i]);
    }

    mail_tool_camel_lock_up ();
    if (input->flag_all) {
        camel_folder_free_uids (input->source, input->uids);
        input->uids = NULL;
    }
    camel_folder_thaw (input->source);
    mail_tool_camel_lock_down ();
}

static void
cleanup_flag_messages (gpointer in_data, gpointer op_data,
               CamelException *ex)
{
    flag_messages_input_t *input = (flag_messages_input_t *) in_data;

    camel_object_unref (CAMEL_OBJECT (input->source));

    if (input->uids)
        g_ptr_array_free (input->uids, TRUE);
}

static const mail_operation_spec op_flag_messages = {
    describe_flag_messages,
    0,
    setup_flag_messages,
    do_flag_messages,
    cleanup_flag_messages
};

void
mail_do_flag_messages (CamelFolder *source, GPtrArray *uids,
               gboolean invert,
               guint32 mask, guint32 set)
{
    flag_messages_input_t *input;

    input = g_new (flag_messages_input_t, 1);
    input->source = source;
    input->uids = uids;
    input->invert = invert;
    input->mask = mask;
    input->set = set;
    input->flag_all = FALSE;

    mail_operation_queue (&op_flag_messages, input, TRUE);
}

void
mail_do_flag_all_messages (CamelFolder *source, gboolean invert,
               guint32 mask, guint32 set)
{
    flag_messages_input_t *input;

    input = g_new (flag_messages_input_t, 1);
    input->source = source;
    input->uids = NULL;
    input->invert = invert;
    input->mask = mask;
    input->set = set;
    input->flag_all = TRUE;

    mail_operation_queue (&op_flag_messages, input, TRUE);
}

/* ** SCAN SUBFOLDERS ***************************************************** */

typedef struct scan_subfolders_input_s
{
    gchar *source_uri;
    gboolean add_INBOX;
    EvolutionStorage *storage;
}
scan_subfolders_input_t;

typedef struct scan_subfolders_folderinfo_s
{
    char *path;
    char *uri;
}
scan_subfolders_folderinfo_t;

typedef struct scan_subfolders_op_s
{
    GPtrArray *new_folders;
}
scan_subfolders_op_t;

static gchar *describe_scan_subfolders (gpointer in_data, gboolean gerund);
static void setup_scan_subfolders (gpointer in_data, gpointer op_data,
                   CamelException *ex);
static void do_scan_subfolders (gpointer in_data, gpointer op_data,
                CamelException *ex);
static void cleanup_scan_subfolders (gpointer in_data, gpointer op_data,
                     CamelException *ex);

static gchar *
describe_scan_subfolders (gpointer in_data, gboolean gerund)
{
    scan_subfolders_input_t *input = (scan_subfolders_input_t *) in_data;

    if (gerund)
        return g_strdup_printf (_("Scanning folders in \"%s\""),
                    input->source_uri);
    else
        return g_strdup_printf (_("Scan folders in \"%s\""),
                    input->source_uri);
}

static void
setup_scan_subfolders (gpointer in_data, gpointer op_data,
               CamelException *ex)
{
    scan_subfolders_input_t *input = (scan_subfolders_input_t *) in_data;
    scan_subfolders_op_t *data = (scan_subfolders_op_t *) op_data;
    
    if (!input->source_uri) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     /* doesn't need i18n */
                     "No source uri to scan subfolders from was provided.");
        return;
    }
    
    if (!EVOLUTION_IS_STORAGE (input->storage)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "No storage to scan subfolders into was provided.");
        return;
    }
    
    gtk_object_ref (GTK_OBJECT (input->storage));
    data->new_folders = g_ptr_array_new ();
}

static void
do_scan_subfolders (gpointer in_data, gpointer op_data, CamelException *ex)
{
    scan_subfolders_input_t *input = (scan_subfolders_input_t *) in_data;
    scan_subfolders_op_t *data = (scan_subfolders_op_t *) op_data;
    scan_subfolders_folderinfo_t *info;
    GPtrArray *lsub;
    CamelFolder *folder;
    int i;
    char *splice;
    
    if (input->source_uri[strlen (input->source_uri) - 1] == '/')
        splice = "";
    else
        splice = "/";
    
    folder = mail_tool_get_root_of_store (input->source_uri, ex);
    if (camel_exception_is_set (ex))
        return;
    
    mail_tool_camel_lock_up ();
    
    lsub = camel_folder_get_subfolder_names (folder);
    
    mail_tool_camel_lock_down ();
    
    for (i = 0; i < lsub->len; i++) {
        mail_op_set_message (_("Found subfolder \"%s\""), (char *) lsub->pdata[i]);
        info = g_new (scan_subfolders_folderinfo_t, 1);
        info->path = g_strdup_printf ("/%s", (char *) lsub->pdata[i]);
        info->uri = g_strdup_printf ("%s%s%s", input->source_uri, splice,
                         (char *)lsub->pdata[i]);
        g_ptr_array_add (data->new_folders, info);
    }
    
    camel_folder_free_subfolder_names (folder, lsub);
    
    /* FIXME: We intentionally lose a reference to the store here
     * for the benefit of the IMAP provider. Undo this when the
     * namespace situation is fixed.
     */
    camel_object_ref (CAMEL_OBJECT (folder->parent_store));
    camel_object_unref (CAMEL_OBJECT (folder));
}

static void
cleanup_scan_subfolders (gpointer in_data, gpointer op_data,
             CamelException *ex)
{
    scan_subfolders_input_t *input = (scan_subfolders_input_t *) in_data;
    scan_subfolders_op_t *data = (scan_subfolders_op_t *) op_data;
    int i;
    
    for (i = 0; i < data->new_folders->len; i++) {
        scan_subfolders_folderinfo_t *info;
        
        info = data->new_folders->pdata[i];
        evolution_storage_new_folder (input->storage,
                          info->path,
                          g_basename (info->path),
                          "mail",
                          info->uri, _("(No description)"));
        g_free (info->path);
        g_free (info->uri);
        g_free (info);
    }
    
    g_ptr_array_free (data->new_folders, TRUE);
    gtk_object_unref (GTK_OBJECT (input->storage));
    g_free (input->source_uri);
}

static const mail_operation_spec op_scan_subfolders = {
    describe_scan_subfolders,
    sizeof (scan_subfolders_op_t),
    setup_scan_subfolders,
    do_scan_subfolders,
    cleanup_scan_subfolders
};

void
mail_do_scan_subfolders (const gchar *source_uri, EvolutionStorage *storage)
{
    scan_subfolders_input_t *input;
    
    input = g_new (scan_subfolders_input_t, 1);
    input->source_uri = g_strdup (source_uri);
    input->storage = storage;
    
    mail_operation_queue (&op_scan_subfolders, input, TRUE);
}

/* ** ATTACH MESSAGE ****************************************************** */

typedef struct attach_message_input_s
{
    EMsgComposer *composer;
    CamelFolder *folder;
    gchar *uid;
}
attach_message_input_t;

typedef struct attach_message_data_s
{
    CamelMimePart *part;
}
attach_message_data_t;

static gchar *describe_attach_message (gpointer in_data, gboolean gerund);
static void setup_attach_message (gpointer in_data, gpointer op_data,
                  CamelException *ex);
static void do_attach_message (gpointer in_data, gpointer op_data,
                   CamelException *ex);
static void cleanup_attach_message (gpointer in_data, gpointer op_data,
                    CamelException *ex);

static gchar *
describe_attach_message (gpointer in_data, gboolean gerund)
{
    attach_message_input_t *input = (attach_message_input_t *) in_data;

    if (gerund)
        return
            g_strdup_printf
            (_("Attaching messages from folder \"%s\""),
             mail_tool_get_folder_name (input->folder));
    else
        return g_strdup_printf (_("Attach messages from \"%s\""),
                    mail_tool_get_folder_name (input->folder));
}

static void
setup_attach_message (gpointer in_data, gpointer op_data, CamelException *ex)
{
    attach_message_input_t *input = (attach_message_input_t *) in_data;

    if (!input->uid) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     /* doesn't need i18n */
                     "No UID specified to attach.");
        return;
    }

    if (!CAMEL_IS_FOLDER (input->folder)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "No folder to fetch the message from specified.");
        return;
    }

    if (!E_IS_MSG_COMPOSER (input->composer)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "No message composer from specified.");
        return;
    }

    camel_object_ref (CAMEL_OBJECT (input->folder));
    gtk_object_ref (GTK_OBJECT (input->composer));
}

static void
do_attach_message (gpointer in_data, gpointer op_data, CamelException *ex)
{
    attach_message_input_t *input = (attach_message_input_t *) in_data;
    attach_message_data_t *data = (attach_message_data_t *) op_data;

    CamelMimeMessage *message;
    CamelMimePart *part;

    mail_tool_camel_lock_up ();
    message = camel_folder_get_message (input->folder, input->uid, ex);
    if (!message) {
        mail_tool_camel_lock_down ();
        return;
    }

    part = mail_tool_make_message_attachment (message);
    camel_object_unref (CAMEL_OBJECT (message));
    mail_tool_camel_lock_down ();
    if (!part)
        return;

    data->part = part;
}

static void
cleanup_attach_message (gpointer in_data, gpointer op_data,
            CamelException *ex)
{
    attach_message_input_t *input = (attach_message_input_t *) in_data;
    attach_message_data_t *data = (attach_message_data_t *) op_data;

    e_msg_composer_attach (input->composer, data->part);
    camel_object_unref (CAMEL_OBJECT (data->part));
    camel_object_unref (CAMEL_OBJECT (input->folder));
    gtk_object_unref (GTK_OBJECT (input->composer));
    g_free (input->uid);
}

static const mail_operation_spec op_attach_message = {
    describe_attach_message,
    sizeof (attach_message_data_t),
    setup_attach_message,
    do_attach_message,
    cleanup_attach_message
};

void
mail_do_attach_message (CamelFolder *folder, const char *uid,
            EMsgComposer *composer)
{
    attach_message_input_t *input;

    input = g_new (attach_message_input_t, 1);
    input->folder = folder;
    input->uid = g_strdup (uid);
    input->composer = composer;

    mail_operation_queue (&op_attach_message, input, TRUE);
}

/* ** FORWARD MESSAGES **************************************************** */

typedef struct forward_messages_input_s
{
    CamelMimeMessage *basis;
    CamelFolder *source;
    GPtrArray *uids;
    EMsgComposer *composer;
}
forward_messages_input_t;

typedef struct forward_messages_data_s
{
    gchar *subject;
    GPtrArray *parts;
}
forward_messages_data_t;

static gchar *describe_forward_messages (gpointer in_data, gboolean gerund);
static void setup_forward_messages (gpointer in_data, gpointer op_data,
                    CamelException *ex);
static void do_forward_messages (gpointer in_data, gpointer op_data,
                 CamelException *ex);
static void cleanup_forward_messages (gpointer in_data, gpointer op_data,
                      CamelException *ex);

static gchar *
describe_forward_messages (gpointer in_data, gboolean gerund)
{
    forward_messages_input_t *input = (forward_messages_input_t *) in_data;

    if (gerund) {
        if (input->basis->subject)
            return g_strdup_printf (_("Forwarding messages \"%s\""),
                        input->basis->subject);
        else
            return
                g_strdup_printf
                (_("Forwarding a message without a subject"));
    } else {
        if (input->basis->subject)
            return g_strdup_printf (_("Forward message \"%s\""),
                        input->basis->subject);
        else
            return
                g_strdup_printf
                (_("Forward a message without a subject"));
    }
}

static void
setup_forward_messages (gpointer in_data, gpointer op_data,
            CamelException *ex)
{
    forward_messages_input_t *input = (forward_messages_input_t *) in_data;

    if (!input->uids) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     /* doesn't need i18n */
                     "No UIDs specified to attach.");
        return;
    }

    if (!CAMEL_IS_MIME_MESSAGE (input->basis)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "No basic message to forward was specified.");
        return;
    }

    if (!CAMEL_IS_FOLDER (input->source)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "No folder to fetch the messages from specified.");
        return;
    }

    if (!E_IS_MSG_COMPOSER (input->composer)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "No message composer from specified.");
        return;
    }

    camel_object_ref (CAMEL_OBJECT (input->basis));
    camel_object_ref (CAMEL_OBJECT (input->source));
    gtk_object_ref (GTK_OBJECT (input->composer));
}

static void
do_forward_messages (gpointer in_data, gpointer op_data, CamelException *ex)
{
    forward_messages_input_t *input = (forward_messages_input_t *) in_data;
    forward_messages_data_t *data = (forward_messages_data_t *) op_data;

    CamelMimeMessage *message;
    CamelMimePart *part;
    int i;

    data->parts = g_ptr_array_new ();

    mail_tool_camel_lock_up ();
    for (i = 0; i < input->uids->len; i++) {
        mail_op_set_message (_("Retrieving message number %d of %d (uid \"%s\")"),
                     i + 1, input->uids->len, (char *) input->uids->pdata[i]);
        message =
            camel_folder_get_message (input->source,
                          input->uids->pdata[i], ex);
        g_free (input->uids->pdata[i]);
        if (!message) {
            mail_tool_camel_lock_down ();
            return;
        }
        part = mail_tool_make_message_attachment (message);
        if (!part) {
            camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM,
                         _("Failed to generate mime part from "
                         "message while generating forwarded message."));
            mail_tool_camel_lock_down ();
            return;
        }
        camel_object_unref (CAMEL_OBJECT (message));
        g_ptr_array_add (data->parts, part);
    }

    mail_tool_camel_lock_down ();

    data->subject = mail_tool_generate_forward_subject (input->basis);
}

static void
cleanup_forward_messages (gpointer in_data, gpointer op_data,
              CamelException *ex)
{
    forward_messages_input_t *input =

        (forward_messages_input_t *) in_data;
    forward_messages_data_t *data = (forward_messages_data_t *) op_data;

    int i;

    for (i = 0; i < data->parts->len; i++) {
        e_msg_composer_attach (input->composer,
                       data->parts->pdata[i]);
        camel_object_unref (CAMEL_OBJECT (data->parts->pdata[i]));
    }
    camel_object_unref (CAMEL_OBJECT (input->source));

    e_msg_composer_set_headers (input->composer, NULL, NULL, NULL,
                    data->subject);

    gtk_object_unref (GTK_OBJECT (input->composer));
    g_free (data->subject);
    g_ptr_array_free (data->parts, TRUE);
    g_ptr_array_free (input->uids, TRUE);
    gtk_widget_show (GTK_WIDGET (input->composer));
}

static const mail_operation_spec op_forward_messages = {
    describe_forward_messages,
    sizeof (forward_messages_data_t),
    setup_forward_messages,
    do_forward_messages,
    cleanup_forward_messages
};

void
mail_do_forward_message (CamelMimeMessage *basis,
             CamelFolder *source,
             GPtrArray *uids, EMsgComposer *composer)
{
    forward_messages_input_t *input;

    input = g_new (forward_messages_input_t, 1);
    input->basis = basis;
    input->source = source;
    input->uids = uids;
    input->composer = composer;

    mail_operation_queue (&op_forward_messages, input, TRUE);
}

/* ** LOAD FOLDER ********************************************************* */

typedef struct load_folder_input_s
{
    FolderBrowser *fb;
    gchar *url;
}
load_folder_input_t;

static gchar *describe_load_folder (gpointer in_data, gboolean gerund);
static void setup_load_folder (gpointer in_data, gpointer op_data,
                   CamelException *ex);
static void do_load_folder (gpointer in_data, gpointer op_data,
                CamelException *ex);
static void cleanup_load_folder (gpointer in_data, gpointer op_data,
                 CamelException *ex);

static gchar *
describe_load_folder (gpointer in_data, gboolean gerund)
{
    load_folder_input_t *input = (load_folder_input_t *) in_data;

    if (gerund) {
        return g_strdup_printf (_("Loading \"%s\""), input->url);
    } else {
        return g_strdup_printf (_("Load \"%s\""), input->url);
    }
}

static void
setup_load_folder (gpointer in_data, gpointer op_data, CamelException *ex)
{
    load_folder_input_t *input = (load_folder_input_t *) in_data;

    if (!IS_FOLDER_BROWSER (input->fb)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     /* doesn't need i18n */
                     "No folder browser specified to load into.");
        return;
    }

    if (!input->url) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "No URL to load was specified.");
        return;
    }

    gtk_object_ref (GTK_OBJECT (input->fb));

    if (input->fb->uri)
        g_free (input->fb->uri);

    input->fb->uri = input->url;
}

static void
do_load_folder (gpointer in_data, gpointer op_data, CamelException *ex)
{
    load_folder_input_t *input = (load_folder_input_t *) in_data;

    CamelFolder *folder;

    folder = mail_tool_uri_to_folder (input->url, ex);
    if (!folder)
        return;

    if (input->fb->folder) {
        mail_tool_camel_lock_up ();
        camel_object_unref (CAMEL_OBJECT (input->fb->folder));
        mail_tool_camel_lock_down ();
    }

    input->fb->folder = folder;
}

static void
cleanup_load_folder (gpointer in_data, gpointer op_data, CamelException *ex)
{
    load_folder_input_t *input = (load_folder_input_t *) in_data;

    if (input->fb->folder) {
        gtk_widget_set_sensitive (GTK_WIDGET (input->fb->search_entry),
                      camel_folder_has_search_capability (input->
                                          fb->
                                          folder));
        gtk_widget_set_sensitive (GTK_WIDGET (input->fb->search_menu),
                      camel_folder_has_search_capability (input->
                                          fb->
                                          folder));
        message_list_set_folder (input->fb->message_list, input->fb->folder);
    }

    /*g_free (input->url); = fb->uri now */
}

static const mail_operation_spec op_load_folder = {
    describe_load_folder,
    0,
    setup_load_folder,
    do_load_folder,
    cleanup_load_folder
};

void
mail_do_load_folder (FolderBrowser *fb, const char *url)
{
    load_folder_input_t *input;

    input = g_new (load_folder_input_t, 1);
    input->fb = fb;
    input->url = g_strdup (url);

    mail_operation_queue (&op_load_folder, input, TRUE);
}

/* ** CREATE FOLDER ******************************************************* */

typedef struct create_folder_input_s
{
    Evolution_ShellComponentListener listener;
    char *uri;
    char *type;
}
create_folder_input_t;

typedef struct create_folder_data_s
{
    Evolution_ShellComponentListener_Result result;
}
create_folder_data_t;

static gchar *describe_create_folder (gpointer in_data, gboolean gerund);
static void setup_create_folder (gpointer in_data, gpointer op_data,
                 CamelException *ex);
static void do_create_folder (gpointer in_data, gpointer op_data,
                  CamelException *ex);
static void cleanup_create_folder (gpointer in_data, gpointer op_data,
                   CamelException *ex);

static gchar *
describe_create_folder (gpointer in_data, gboolean gerund)
{
    create_folder_input_t *input = (create_folder_input_t *) in_data;

    if (gerund) {
        return g_strdup_printf (_("Creating \"%s\""), input->uri);
    } else {
        return g_strdup_printf (_("Create \"%s\""), input->uri);
    }
}

static void
setup_create_folder (gpointer in_data, gpointer op_data, CamelException *ex)
{
    create_folder_input_t *input = (create_folder_input_t *) in_data;

    if (input->listener == CORBA_OBJECT_NIL) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     /* doesn't need i18n */
                     "Invalid listener passed to create_folder");
        return;
    }

    if (input->uri == NULL) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "Invalid url passed to create_folder");
        return;
    }

    if (input->type == NULL) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "No type passed to create_folder");
        return;
    }
}

static void
do_create_folder (gpointer in_data, gpointer op_data, CamelException *ex)
{
    create_folder_input_t *input = (create_folder_input_t *) in_data;
    create_folder_data_t *data = (create_folder_data_t *) op_data;

    CamelFolder *folder;
    gchar *camel_url;

    if (strcmp (input->type, "mail") != 0)
        data->result =
            Evolution_ShellComponentListener_UNSUPPORTED_TYPE;
    else {
        camel_url = g_strdup_printf ("mbox://%s", input->uri);
        folder = mail_tool_get_folder_from_urlname (camel_url,
                                "mbox", TRUE, ex);
        g_free (camel_url);

        if (!camel_exception_is_set (ex)) {
            camel_object_unref (CAMEL_OBJECT (folder));
            data->result = Evolution_ShellComponentListener_OK;
        } else {
            data->result =
                Evolution_ShellComponentListener_INVALID_URI;
        }
    }
}

static void
cleanup_create_folder (gpointer in_data, gpointer op_data,
               CamelException *ex)
{
    create_folder_input_t *input = (create_folder_input_t *) in_data;
    create_folder_data_t *data = (create_folder_data_t *) op_data;

    CORBA_Environment ev;

    CORBA_exception_init (&ev);
    Evolution_ShellComponentListener_report_result (input->listener,
                            data->result, &ev);
    if (ev._major != CORBA_NO_EXCEPTION)
        camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM,
                     _("Exception while reporting result to shell "
                     "component listener."));
    CORBA_Object_release (input->listener, &ev);

    g_free (input->uri);
    g_free (input->type);

    CORBA_exception_free (&ev);
}

static const mail_operation_spec op_create_folder = {
    describe_create_folder,
    sizeof (create_folder_data_t),
    setup_create_folder,
    do_create_folder,
    cleanup_create_folder
};

void
mail_do_create_folder (const Evolution_ShellComponentListener listener,
               const char *uri, const char *type)
{
    CORBA_Environment ev;
    create_folder_input_t *input;

    CORBA_exception_init (&ev);

    input = g_new (create_folder_input_t, 1);
    input->listener = CORBA_Object_duplicate (listener, &ev);
    input->uri = g_strdup (uri);
    input->type = g_strdup (type);

    CORBA_exception_free (&ev);

    mail_operation_queue (&op_create_folder, input, FALSE);
}

/* ** SYNC FOLDER ********************************************************* */

static gchar *describe_sync_folder (gpointer in_data, gboolean gerund);
static void setup_sync_folder (gpointer in_data, gpointer op_data,
                   CamelException *ex);
static void do_sync_folder (gpointer in_data, gpointer op_data,
                CamelException *ex);
static void cleanup_sync_folder (gpointer in_data, gpointer op_data,
                 CamelException *ex);

static gchar *
describe_sync_folder (gpointer in_data, gboolean gerund)
{
    CamelFolder *f = CAMEL_FOLDER (in_data);

    if (gerund) {
        return g_strdup_printf (_("Synchronizing \"%s\""), mail_tool_get_folder_name (f));
    } else {
        return g_strdup_printf (_("Synchronize \"%s\""), mail_tool_get_folder_name (f));
    }
}

static void
setup_sync_folder (gpointer in_data, gpointer op_data, CamelException *ex)
{
    if (!CAMEL_IS_FOLDER (in_data)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     /* doesn't need i18n */
                     "No folder is selected to be synced");
        return;
    }

    camel_object_ref (CAMEL_OBJECT (in_data));
}

static void
do_sync_folder (gpointer in_data, gpointer op_data, CamelException *ex)
{
    mail_tool_camel_lock_up ();
    camel_folder_sync (CAMEL_FOLDER (in_data), FALSE, ex);
    mail_tool_camel_lock_down ();
}

static void
cleanup_sync_folder (gpointer in_data, gpointer op_data, CamelException *ex)
{
    camel_object_unref (CAMEL_OBJECT (in_data));
}

static const mail_operation_spec op_sync_folder = {
    describe_sync_folder,
    0,
    setup_sync_folder,
    do_sync_folder,
    cleanup_sync_folder
};

void
mail_do_sync_folder (CamelFolder *folder)
{
    mail_operation_queue (&op_sync_folder, folder, FALSE);
}

/* ** DISPLAY MESSAGE ***************************************************** */

typedef struct display_message_input_s
{
    MessageList *ml;
    gchar *uid;
    gint (*timeout) (gpointer);
}
display_message_input_t;

typedef struct display_message_data_s
{
    CamelMimeMessage *msg;
}
display_message_data_t;

static gchar *describe_display_message (gpointer in_data, gboolean gerund);
static void setup_display_message (gpointer in_data, gpointer op_data,
                   CamelException *ex);
static void do_display_message (gpointer in_data, gpointer op_data,
                CamelException *ex);
static void cleanup_display_message (gpointer in_data, gpointer op_data,
                     CamelException *ex);

static gchar *
describe_display_message (gpointer in_data, gboolean gerund)
{
    display_message_input_t *input = (display_message_input_t *) in_data;

    if (gerund) {
        if (input->uid)
            return g_strdup_printf (_("Displaying message UID \"%s\""),
                        input->uid);
        else
            return g_strdup (_("Clearing message display"));
    } else {
        if (input->uid)
            return g_strdup_printf (_("Display message UID \"%s\""),
                        input->uid);
        else
            return g_strdup (_("Clear message display"));
    }
}

static void
setup_display_message (gpointer in_data, gpointer op_data,
               CamelException *ex)
{
    display_message_input_t *input = (display_message_input_t *) in_data;
    display_message_data_t *data = (display_message_data_t *) op_data;

    if (!IS_MESSAGE_LIST (input->ml)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     /* doesn't need i18n */
                     "Invalid message list passed to display_message");
        return;
    }

    if (!input->timeout) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "No timeout callback passed to display_message");
        return;
    }

    data->msg = NULL;
    gtk_object_ref (GTK_OBJECT (input->ml));
}

static void
do_display_message (gpointer in_data, gpointer op_data, CamelException *ex)
{
    display_message_input_t *input = (display_message_input_t *) in_data;
    display_message_data_t *data = (display_message_data_t *) op_data;

    if (input->uid == NULL) {
        data->msg = NULL;
        return;
    }

    data->msg = camel_folder_get_message (input->ml->folder,
                          input->uid, ex);
}

static void
cleanup_display_message (gpointer in_data, gpointer op_data,
             CamelException *ex)
{
    display_message_input_t *input = (display_message_input_t *) in_data;
    display_message_data_t *data = (display_message_data_t *) op_data;

    MailDisplay *md = input->ml->parent_folder_browser->mail_display;

    if (data->msg == NULL) {
        mail_display_set_message (md, NULL);
    } else {
        gint timeout = mail_config_mark_as_seen_timeout ();

        if (input->ml->seen_id)
            gtk_timeout_remove (input->ml->seen_id);

        mail_display_set_message (md, CAMEL_MEDIUM (data->msg));
        camel_object_unref (CAMEL_OBJECT (data->msg));

        if (timeout > 0) {
            input->ml->seen_id = gtk_timeout_add (timeout, 
                                  input->timeout, 
                                  input->ml);
        } else {
            input->ml->seen_id = 0;
            input->timeout (input->ml);
        }
    }

    if (input->uid)
        g_free (input->uid);
    gtk_object_unref (GTK_OBJECT (input->ml));
}

static const mail_operation_spec op_display_message = {
    describe_display_message,
    sizeof (display_message_data_t),
    setup_display_message,
    do_display_message,
    cleanup_display_message
};

void
mail_do_display_message (MessageList *ml, const char *uid,
             gint (*timeout) (gpointer))
{
    display_message_input_t *input;

    input = g_new (display_message_input_t, 1);
    input->ml = ml;
    input->uid = g_strdup (uid);
    input->timeout = timeout;

    mail_operation_queue (&op_display_message, input, TRUE);
}

/* ** EDIT MESSAGES ******************************************************* */

typedef struct edit_messages_input_s {
    CamelFolder *folder;
    GPtrArray *uids;
    GtkSignalFunc signal;
} edit_messages_input_t;

typedef struct edit_messages_data_s {
    GPtrArray *messages;
} edit_messages_data_t;

static gchar *describe_edit_messages (gpointer in_data, gboolean gerund);
static void setup_edit_messages (gpointer in_data, gpointer op_data,
                 CamelException *ex);
static void do_edit_messages (gpointer in_data, gpointer op_data,
                  CamelException *ex);
static void cleanup_edit_messages (gpointer in_data, gpointer op_data,
                   CamelException *ex);

static gchar *
describe_edit_messages (gpointer in_data, gboolean gerund)
{
    edit_messages_input_t *input = (edit_messages_input_t *) in_data;

    if (gerund)
        return g_strdup_printf
            (_("Opening messages from folder \"%s\""),
             mail_tool_get_folder_name (input->folder));
    else
        return g_strdup_printf (_("Open messages from \"%s\""),
                    mail_tool_get_folder_name (input->folder));
}

static void
setup_edit_messages (gpointer in_data, gpointer op_data, CamelException *ex)
{
    edit_messages_input_t *input = (edit_messages_input_t *) in_data;
    
    if (!input->uids) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     /* doesn't need i18n */
                     "No UIDs specified to edit.");
        return;
    }
    
    if (!CAMEL_IS_FOLDER (input->folder)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "No folder to fetch the messages from specified.");
        return;
    }
    
    camel_object_ref (CAMEL_OBJECT (input->folder));
}

static void
do_edit_messages (gpointer in_data, gpointer op_data, CamelException *ex)
{
    edit_messages_input_t *input = (edit_messages_input_t *) in_data;
    edit_messages_data_t *data = (edit_messages_data_t *) op_data;
    
    int i;
    
    data->messages = g_ptr_array_new ();
    
    for (i = 0; i < input->uids->len; i++) {
        CamelMimeMessage *message;
        
        mail_tool_camel_lock_up ();
        message = camel_folder_get_message (input->folder, input->uids->pdata[i], ex);
        mail_tool_camel_lock_down ();
        
        if (message)
            g_ptr_array_add (data->messages, message);
        
        g_free (input->uids->pdata[i]);
    }
}

static void
cleanup_edit_messages (gpointer in_data, gpointer op_data,
            CamelException *ex)
{
    edit_messages_input_t *input = (edit_messages_input_t *) in_data;
    edit_messages_data_t *data = (edit_messages_data_t *) op_data;

    int i;

    for (i = 0; i < data->messages->len; i++) {
        GtkWidget *composer;

        composer = e_msg_composer_new_with_message (data->messages->pdata[i]);

        if (input->signal)
            gtk_signal_connect (GTK_OBJECT (composer), "send", 
                        input->signal, NULL);

        gtk_widget_show (composer);

        camel_object_unref (CAMEL_OBJECT (data->messages->pdata[i]));
    }

    g_ptr_array_free (input->uids, TRUE);
    g_ptr_array_free (data->messages, TRUE);
    camel_object_unref (CAMEL_OBJECT (input->folder));

}

static const mail_operation_spec op_edit_messages = {
    describe_edit_messages,
    sizeof (edit_messages_data_t),
    setup_edit_messages,
    do_edit_messages,
    cleanup_edit_messages
};

void
mail_do_edit_messages (CamelFolder *folder, GPtrArray *uids,
               GtkSignalFunc signal)
{
    edit_messages_input_t *input;

    input = g_new (edit_messages_input_t, 1);
    input->folder = folder;
    input->uids = uids;
    input->signal = signal;

    mail_operation_queue (&op_edit_messages, input, TRUE);
}

/* ** SETUP FOLDER ****************************************************** */

typedef struct setup_folder_input_s {
    gchar *name;
    CamelFolder **folder;
} setup_folder_input_t;

static gchar *describe_setup_folder (gpointer in_data, gboolean gerund);
static void setup_setup_folder (gpointer in_data, gpointer op_data,
                CamelException *ex);
static void do_setup_folder (gpointer in_data, gpointer op_data,
                 CamelException *ex);
static void cleanup_setup_folder (gpointer in_data, gpointer op_data,
                  CamelException *ex);

static gchar *
describe_setup_folder (gpointer in_data, gboolean gerund)
{
    setup_folder_input_t *input = (setup_folder_input_t *) in_data;

    if (gerund)
        return g_strdup_printf (_("Loading %s Folder"), input->name);
    else
        return g_strdup_printf (_("Load %s Folder"), input->name);
}

static void
setup_setup_folder (gpointer in_data, gpointer op_data, CamelException *ex)
{
}

static void
do_setup_folder (gpointer in_data, gpointer op_data, CamelException *ex)
{
    setup_folder_input_t *input = (setup_folder_input_t *) in_data;
    gchar *url;

    url = g_strdup_printf ("mbox://%s/local/%s", evolution_dir,
                   input->name);
    *(input->folder) = mail_tool_get_folder_from_urlname (url, "mbox",
                                  TRUE, ex);
    g_free (url);
}

static void
cleanup_setup_folder (gpointer in_data, gpointer op_data, CamelException *ex)
{
    setup_folder_input_t *input = (setup_folder_input_t *) in_data;

    g_free (input->name);
}

static const mail_operation_spec op_setup_folder = {
    describe_setup_folder,
    0,
    setup_setup_folder,
    do_setup_folder,
    cleanup_setup_folder
};

void
mail_do_setup_folder (const char *name, CamelFolder **folder)
{
    setup_folder_input_t *input;

    input = g_new (setup_folder_input_t, 1);
    input->name = g_strdup (name);
    input->folder = folder;
    mail_operation_queue (&op_setup_folder, input, TRUE);
}

/* ** VIEW MESSAGES ******************************************************* */

typedef struct view_messages_input_s {
    CamelFolder *folder;
    GPtrArray *uids;
    FolderBrowser *fb;
} view_messages_input_t;

typedef struct view_messages_data_s {
    GPtrArray *messages;
} view_messages_data_t;

static gchar *describe_view_messages (gpointer in_data, gboolean gerund);
static void setup_view_messages (gpointer in_data, gpointer op_data,
                  CamelException *ex);
static void do_view_messages (gpointer in_data, gpointer op_data,
                   CamelException *ex);
static void cleanup_view_messages (gpointer in_data, gpointer op_data,
                    CamelException *ex);

static gchar *
describe_view_messages (gpointer in_data, gboolean gerund)
{
    view_messages_input_t *input = (view_messages_input_t *) in_data;

    if (gerund)
        return g_strdup_printf
            (_("Viewing messages from folder \"%s\""),
             mail_tool_get_folder_name (input->folder));
    else
        return g_strdup_printf (_("View messages from \"%s\""),
                    mail_tool_get_folder_name (input->folder));
}

static void
setup_view_messages (gpointer in_data, gpointer op_data, CamelException *ex)
{
    view_messages_input_t *input = (view_messages_input_t *) in_data;

    if (!input->uids) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     /* doesn't need i18n */
                     "No UIDs specified to view.");
        return;
    }

    if (!CAMEL_IS_FOLDER (input->folder)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "No folder to fetch the messages from specified.");
        return;
    }

    if (!IS_FOLDER_BROWSER (input->fb)) {
        camel_exception_set (ex, CAMEL_EXCEPTION_INVALID_PARAM,
                     "No folder browser was specified.");
        return;
    }


    camel_object_ref (CAMEL_OBJECT (input->folder));
    gtk_object_ref (GTK_OBJECT (input->fb));
}

static void
do_view_messages (gpointer in_data, gpointer op_data, CamelException *ex)
{
    view_messages_input_t *input = (view_messages_input_t *) in_data;
    view_messages_data_t *data = (view_messages_data_t *) op_data;

    int i;

    data->messages = g_ptr_array_new ();

    for (i = 0; i < input->uids->len; i++) {
        CamelMimeMessage *message;

        mail_op_set_message (_("Retrieving message %d of %d (uid \"%s\")"),
                     i + 1, input->uids->len, (char *)input->uids->pdata[i]);

        mail_tool_camel_lock_up ();
        message = camel_folder_get_message (input->folder, input->uids->pdata[i], ex);
        mail_tool_camel_lock_down ();

        g_ptr_array_add (data->messages, message);
    }
}

static void
cleanup_view_messages (gpointer in_data, gpointer op_data,
               CamelException *ex)
{
    view_messages_input_t *input = (view_messages_input_t *) in_data;
    view_messages_data_t *data = (view_messages_data_t *) op_data;

    int i;

    for (i = 0; i < data->messages->len; i++) {
        CamelMimeMessage *msg;
        gchar *uid;
        GtkWidget *view;

        if (data->messages->pdata[i] == NULL)
            continue;

        msg = data->messages->pdata[i];
        uid = input->uids->pdata[i];

        view = mail_view_create (input->folder, uid, msg);
        gtk_widget_show (view);

        /*Owned by the mail_display now*/
        camel_object_unref (CAMEL_OBJECT (data->messages->pdata[i]));
        g_free (uid);
    }

    g_ptr_array_free (input->uids, TRUE);
    g_ptr_array_free (data->messages, TRUE);
    camel_object_unref (CAMEL_OBJECT (input->folder));
    gtk_object_unref (GTK_OBJECT (input->fb));
}

static const mail_operation_spec op_view_messages = {
    describe_view_messages,
    sizeof (view_messages_data_t),
    setup_view_messages,
    do_view_messages,
    cleanup_view_messages
};

void
mail_do_view_messages (CamelFolder *folder, GPtrArray *uids,
               FolderBrowser *fb)
{
    view_messages_input_t *input;

    input = g_new (view_messages_input_t, 1);
    input->folder = folder;
    input->uids = uids;
    input->fb = fb;

    mail_operation_queue (&op_view_messages, input, TRUE);
}