path: root/mail/e-mail-session.c

/*
 * e-mail-session.c
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *   Jonathon Jongsma <jonathon.jongsma@collabora.co.uk>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 * Copyright (C) 2009 Intel Corporation
 *
 */

/* mail-session.c: handles the session information and resource manipulation */

#include <config.h>

#include <errno.h>
#include <stdlib.h>
#include <string.h>

#include <glib.h>
#include <glib/gi18n.h>
#include <glib/gstdio.h>

#include <gtk/gtk.h>

#include <gconf/gconf-client.h>

#ifdef HAVE_CANBERRA
#include <canberra-gtk.h>
#endif

#include <libedataserverui/e-passwords.h>
#include <libedataserver/e-flag.h>

#include "e-util/e-util.h"
#include "e-util/e-account-utils.h"
#include "e-util/e-alert-dialog.h"
#include "e-util/e-util-private.h"

#include "e-mail-folder-utils.h"
#include "e-mail-local.h"
#include "e-mail-session.h"
#include "em-composer-utils.h"
#include "em-filter-context.h"
#include "em-filter-rule.h"
#include "em-utils.h"
#include "mail-config.h"
#include "mail-mt.h"
#include "mail-ops.h"
#include "mail-send-recv.h"
#include "mail-tools.h"

static guint session_check_junk_notify_id;
static guint session_gconf_proxy_id;

typedef struct _AsyncContext AsyncContext;

struct _EMailSessionPrivate {
    MailFolderCache *folder_cache;

    FILE *filter_logfile;
    GList *junk_plugins;
};

struct _AsyncContext {
    /* arguments */
    CamelStoreGetFolderFlags flags;
    gchar *uid;
    gchar *uri;

    /* results */
    CamelFolder *folder;
};

enum {
    PROP_0,
    PROP_FOLDER_CACHE
};

static gchar *mail_data_dir;
static gchar *mail_config_dir;

#if 0
static MailMsgInfo ms_thread_info_dummy = { sizeof (MailMsg) };
#endif

G_DEFINE_TYPE (
    EMailSession,
    e_mail_session,
    CAMEL_TYPE_SESSION)

/* Support for CamelSession.alert_user() *************************************/

static gpointer user_message_dialog;
static GQueue user_message_queue = { NULL, NULL, 0 };

struct _user_message_msg {
    MailMsg base;

    CamelSessionAlertType type;
    gchar *prompt;
    EFlag *done;

    guint allow_cancel:1;
    guint result:1;
    guint ismain:1;
};

static void user_message_exec (struct _user_message_msg *m,
                               GCancellable *cancellable,
                               GError **error);

static void
user_message_response_free (GtkDialog *dialog,
                            gint button,
                            struct _user_message_msg *m)
{
    gtk_widget_destroy ((GtkWidget *) dialog);

    user_message_dialog = NULL;

    /* check for pendings */
    if (!g_queue_is_empty (&user_message_queue)) {
        GCancellable *cancellable;

        m = g_queue_pop_head (&user_message_queue);
        cancellable = e_activity_get_cancellable (m->base.activity);
        user_message_exec (m, cancellable, &m->base.error);
        mail_msg_unref (m);
    }
}

/* clicked, send back the reply */
static void
user_message_response (GtkDialog *dialog,
                       gint button,
                       struct _user_message_msg *m)
{
    /* if !allow_cancel, then we've already replied */
    if (m->allow_cancel) {
        m->result = button == GTK_RESPONSE_OK;
        e_flag_set (m->done);
    }

    user_message_response_free (dialog, button, m);
}

static void
user_message_exec (struct _user_message_msg *m,
                   GCancellable *cancellable,
                   GError **error)
{
    GtkWindow *parent;
    const gchar *error_type;

    if (!m->ismain && user_message_dialog != NULL) {
        g_queue_push_tail (&user_message_queue, mail_msg_ref (m));
        return;
    }

    switch (m->type) {
        case CAMEL_SESSION_ALERT_INFO:
            error_type = m->allow_cancel ?
                "mail:session-message-info-cancel" :
                "mail:session-message-info";
            break;
        case CAMEL_SESSION_ALERT_WARNING:
            error_type = m->allow_cancel ?
                "mail:session-message-warning-cancel" :
                "mail:session-message-warning";
            break;
        case CAMEL_SESSION_ALERT_ERROR:
            error_type = m->allow_cancel ?
                "mail:session-message-error-cancel" :
                "mail:session-message-error";
            break;
        default:
            error_type = NULL;
            g_return_if_reached ();
    }

    /* Pull in the active window from the shell to get a parent window */
    parent = e_shell_get_active_window (e_shell_get_default ());
    user_message_dialog = e_alert_dialog_new_for_args (
        parent, error_type, m->prompt, NULL);
    g_object_set (user_message_dialog, "resizable", TRUE, NULL);

    /* XXX This is a case where we need to be able to construct
     *     custom EAlerts without a predefined XML definition. */
    if (m->ismain) {
        gint response;

        response = gtk_dialog_run (user_message_dialog);
        user_message_response (
            user_message_dialog, response, m);
    } else {
        g_signal_connect (
            user_message_dialog, "response",
            G_CALLBACK (user_message_response), m);
        gtk_widget_show (user_message_dialog);
    }
}

static void
user_message_free (struct _user_message_msg *m)
{
    g_free (m->prompt);
    e_flag_free (m->done);
}

static MailMsgInfo user_message_info = {
    sizeof (struct _user_message_msg),
    (MailMsgDescFunc) NULL,
    (MailMsgExecFunc) user_message_exec,
    (MailMsgDoneFunc) NULL,
    (MailMsgFreeFunc) user_message_free
};

/* Support for CamelSession.get_filter_driver () *****************************/

static CamelFolder *
get_folder (CamelFilterDriver *d,
            const gchar *uri,
            gpointer user_data,
            GError **error)
{
    EMailSession *session = E_MAIL_SESSION (user_data);

    /* FIXME Not passing a GCancellable here. */
    /* FIXME Need a camel_filter_driver_get_session(). */
    return e_mail_session_uri_to_folder_sync (
        session, uri, 0, NULL, error);
}

static gboolean
session_play_sound_cb (const gchar *filename)
{
#ifdef HAVE_CANBERRA
    if (filename != NULL && *filename != '\0')
        ca_context_play (
            ca_gtk_context_get (), 0,
            CA_PROP_MEDIA_FILENAME, filename,
            NULL);
    else
#endif
        gdk_beep ();

    return FALSE;
}

static void
session_play_sound (CamelFilterDriver *driver,
                    const gchar *filename,
                    gpointer user_data)
{
    g_idle_add_full (
        G_PRIORITY_DEFAULT_IDLE,
        (GSourceFunc) session_play_sound_cb,
        g_strdup (filename), (GDestroyNotify) g_free);
}

static void
session_system_beep (CamelFilterDriver *driver,
                     gpointer user_data)
{
    g_idle_add ((GSourceFunc) session_play_sound_cb, NULL);
}

static CamelFilterDriver *
main_get_filter_driver (CamelSession *session,
                        const gchar *type,
                        GError **error)
{
    EMailSession *ms = E_MAIL_SESSION (session);
    CamelFilterDriver *driver;
    EFilterRule *rule = NULL;
    const gchar *config_dir;
    gchar *user, *system;
    GConfClient *client;
    ERuleContext *fc;

    client = gconf_client_get_default ();

    config_dir = mail_session_get_config_dir ();
    user = g_build_filename (config_dir, "filters.xml", NULL);
    system = g_build_filename (EVOLUTION_PRIVDATADIR, "filtertypes.xml", NULL);
    fc = (ERuleContext *) em_filter_context_new (ms);
    e_rule_context_load (fc, system, user);
    g_free (system);
    g_free (user);

    driver = camel_filter_driver_new (session);
    camel_filter_driver_set_folder_func (driver, get_folder, session);

    if (gconf_client_get_bool (client, "/apps/evolution/mail/filters/log", NULL)) {
        if (ms->priv->filter_logfile == NULL) {
            gchar *filename;

            filename = gconf_client_get_string (
                client, "/apps/evolution/mail/filters/logfile", NULL);
            if (filename) {
                ms->priv->filter_logfile = g_fopen (filename, "a+");
                g_free (filename);
            }
        }

        if (ms->priv->filter_logfile)
            camel_filter_driver_set_logfile (driver, ms->priv->filter_logfile);
    }

    camel_filter_driver_set_shell_func (driver, mail_execute_shell_command, NULL);
    camel_filter_driver_set_play_sound_func (driver, session_play_sound, NULL);
    camel_filter_driver_set_system_beep_func (driver, session_system_beep, NULL);

    if ((!strcmp (type, E_FILTER_SOURCE_INCOMING) ||
        !strcmp (type, E_FILTER_SOURCE_JUNKTEST))
        && camel_session_get_check_junk (session)) {

        /* implicit junk check as 1st rule */
        camel_filter_driver_add_rule (
            driver, "Junk check", "(junk-test)",
            "(begin (set-system-flag \"junk\"))");
    }

    if (strcmp (type, E_FILTER_SOURCE_JUNKTEST) != 0) {
        GString *fsearch, *faction;

        fsearch = g_string_new ("");
        faction = g_string_new ("");

        if (!strcmp (type, E_FILTER_SOURCE_DEMAND))
            type = E_FILTER_SOURCE_INCOMING;

        /* add the user-defined rules next */
        while ((rule = e_rule_context_next_rule (fc, rule, type))) {
            g_string_truncate (fsearch, 0);
            g_string_truncate (faction, 0);

            /* skip disabled rules */
            if (!rule->enabled)
                continue;

            e_filter_rule_build_code (rule, fsearch);
            em_filter_rule_build_action ((EMFilterRule *) rule, faction);
            camel_filter_driver_add_rule (driver, rule->name, fsearch->str, faction->str);
        }

        g_string_free (fsearch, TRUE);
        g_string_free (faction, TRUE);
    }

    g_object_unref (fc);

    g_object_unref (client);

    return driver;
}

/* Support for CamelSession.forward_to () ************************************/

static guint preparing_flush = 0;

static gboolean
forward_to_flush_outbox_cb (EMailSession *session)
{
    g_return_val_if_fail (preparing_flush != 0, FALSE);

    preparing_flush = 0;
    mail_send (session);

    return FALSE;
}

static void
ms_forward_to_cb (CamelFolder *folder,
                  GAsyncResult *result,
                  EMailSession *session)
{
    GConfClient *client;

    /* FIXME Poor error handling. */
    if (!e_mail_folder_append_message_finish (folder, result, NULL, NULL))
        return;

    client = gconf_client_get_default ();

    /* do not call mail send immediately, just pile them all in the outbox */
    if (preparing_flush || gconf_client_get_bool (
        client, "/apps/evolution/mail/filters/flush-outbox", NULL)) {
        if (preparing_flush)
            g_source_remove (preparing_flush);

        preparing_flush = g_timeout_add_seconds (
            60, (GSourceFunc)
            forward_to_flush_outbox_cb, session);
    }

    g_object_unref (client);
}

/* Support for SOCKS proxy ***************************************************/

#define DIR_PROXY "/system/proxy"
#define MODE_PROXY "/system/proxy/mode"
#define KEY_SOCKS_HOST "/system/proxy/socks_host"
#define KEY_SOCKS_PORT "/system/proxy/socks_port"

static void
set_socks_proxy_from_gconf (CamelSession *session)
{
    GConfClient *client;
    gchar *mode, *host;
    gint port;

    client = gconf_client_get_default ();

    mode = gconf_client_get_string (client, MODE_PROXY, NULL);
    if (!g_strcmp0(mode, "manual")) {
        host = gconf_client_get_string (client, KEY_SOCKS_HOST, NULL); /* NULL-GError */
        port = gconf_client_get_int (client, KEY_SOCKS_PORT, NULL); /* NULL-GError */
        camel_session_set_socks_proxy (session, host, port);
        g_free (host);
    }
    g_free (mode);

    g_object_unref (client);
}

static void
proxy_gconf_notify_cb (GConfClient* client,
                       guint cnxn_id,
                       GConfEntry *entry,
                       gpointer user_data)
{
    CamelSession *session = CAMEL_SESSION (user_data);

    if (strcmp (entry->key, KEY_SOCKS_HOST) == 0
        || strcmp (entry->key, KEY_SOCKS_PORT) == 0)
        set_socks_proxy_from_gconf (session);
}

static void
set_socks_proxy_gconf_watch (CamelSession *session)
{
    GConfClient *client;

    client = gconf_client_get_default ();

    gconf_client_add_dir (
        client, DIR_PROXY,
        GCONF_CLIENT_PRELOAD_ONELEVEL, NULL); /* NULL-GError */
    session_gconf_proxy_id = gconf_client_notify_add (
        client, DIR_PROXY, proxy_gconf_notify_cb,
        session, NULL, NULL); /* NULL-GError */

    g_object_unref (client);
}

static void
init_socks_proxy (CamelSession *session)
{
    g_return_if_fail (CAMEL_IS_SESSION (session));

    set_socks_proxy_gconf_watch (session);
    set_socks_proxy_from_gconf (session);
}

/*****************************************************************************/

static void
async_context_free (AsyncContext *context)
{
    if (context->folder != NULL)
        g_object_unref (context->folder);

    g_free (context->uid);
    g_free (context->uri);

    g_slice_free (AsyncContext, context);
}

static gchar *
mail_session_make_key (CamelService *service,
                       const gchar *item)
{
    gchar *key;

    if (service != NULL)
        key = camel_url_to_string (
            camel_service_get_camel_url (service),
            CAMEL_URL_HIDE_PASSWORD | CAMEL_URL_HIDE_PARAMS);
    else
        key = g_strdup (item);

    return key;
}

static void
mail_session_check_junk_notify (GConfClient *gconf,
                                guint id,
                                GConfEntry *entry,
                                CamelSession *session)
{
    gchar *key;

    g_return_if_fail (gconf_entry_get_key (entry) != NULL);
    g_return_if_fail (gconf_entry_get_value (entry) != NULL);

    key = strrchr (gconf_entry_get_key (entry), '/');
    if (key) {
        key++;
        if (strcmp (key, "check_incoming") == 0)
            camel_session_set_check_junk (
                session, gconf_value_get_bool (
                gconf_entry_get_value (entry)));
    }
}

static void
mail_session_get_property (GObject *object,
                           guint property_id,
                           GValue *value,
                           GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_FOLDER_CACHE:
            g_value_set_object (
                value,
                e_mail_session_get_folder_cache (
                E_MAIL_SESSION (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
mail_session_dispose (GObject *object)
{
    EMailSessionPrivate *priv;

    priv = E_MAIL_SESSION (object)->priv;

    if (priv->folder_cache != NULL) {
        g_object_unref (priv->folder_cache);
        priv->folder_cache = NULL;
    }

    /* Chain up to parent's dispose() method. */
    G_OBJECT_CLASS (e_mail_session_parent_class)->dispose (object);
}

static void
mail_session_finalize (GObject *object)
{
    GConfClient *client;

    client = gconf_client_get_default ();

    if (session_check_junk_notify_id != 0) {
        gconf_client_notify_remove (client, session_check_junk_notify_id);
        session_check_junk_notify_id = 0;
    }

    if (session_gconf_proxy_id != 0) {
        gconf_client_notify_remove (client, session_gconf_proxy_id);
        session_gconf_proxy_id = 0;
    }

    g_object_unref (client);

    g_free (mail_data_dir);
    g_free (mail_config_dir);

    /* Chain up to parent's finalize() method. */
    G_OBJECT_CLASS (e_mail_session_parent_class)->finalize (object);
}

static gchar *
mail_session_get_password (CamelSession *session,
                           CamelService *service,
                           const gchar *domain,
                           const gchar *prompt,
                           const gchar *item,
                           guint32 flags,
                           GError **error)
{
    gchar *url = NULL;
    gchar *ret = NULL;
    EAccount *account = NULL;

    if (service != NULL) {
        CamelURL *service_url;

        service_url = camel_service_get_camel_url (service);
        url = camel_url_to_string (service_url, CAMEL_URL_HIDE_ALL);
    }

    if (!strcmp(item, "popb4smtp_uid")) {
        /* not 100% mt safe, but should be ok */
        if (url
            && (account = e_get_account_by_transport_url (url)))
            ret = g_strdup (account->source->url);
        else
            ret = g_strdup (url);
    } else {
        gchar *key = mail_session_make_key (service, item);
        EAccountService *config_service = NULL;

        if (domain == NULL)
            domain = "Mail";

        ret = e_passwords_get_password (domain, key);
        if (ret == NULL || (flags & CAMEL_SESSION_PASSWORD_REPROMPT)) {
            gboolean remember;

            g_free (ret);
            ret = NULL;

            if (url) {
                if  ((account = e_get_account_by_source_url (url)))
                    config_service = account->source;
                else if ((account = e_get_account_by_transport_url (url)))
                    config_service = account->transport;
            }

            remember = config_service?config_service->save_passwd:FALSE;

            if (!config_service || (config_service && !config_service->get_password_canceled)) {
                guint32 eflags;
                gchar *title;

                if (flags & CAMEL_SESSION_PASSPHRASE) {
                    if (account)
                        title = g_strdup_printf (_("Enter Passphrase for %s"), account->name);
                    else
                        title = g_strdup (_("Enter Passphrase"));
                } else {
                    if (account)
                        title = g_strdup_printf (_("Enter Password for %s"), account->name);
                    else
                        title = g_strdup (_("Enter Password"));
                }
                if ((flags & CAMEL_SESSION_PASSWORD_STATIC) != 0)
                    eflags = E_PASSWORDS_REMEMBER_NEVER;
                else if (config_service == NULL)
                    eflags = E_PASSWORDS_REMEMBER_SESSION;
                else
                    eflags = E_PASSWORDS_REMEMBER_FOREVER;

                if (flags & CAMEL_SESSION_PASSWORD_REPROMPT)
                    eflags |= E_PASSWORDS_REPROMPT;

                if (flags & CAMEL_SESSION_PASSWORD_SECRET)
                    eflags |= E_PASSWORDS_SECRET;

                if (flags & CAMEL_SESSION_PASSPHRASE)
                    eflags |= E_PASSWORDS_PASSPHRASE;

                /* HACK: breaks abstraction ...
                 * e_account_writable() doesn't use the
                 * EAccount, it also uses the same writable
                 * key for source and transport. */
                if (!e_account_writable (NULL, E_ACCOUNT_SOURCE_SAVE_PASSWD))
                    eflags |= E_PASSWORDS_DISABLE_REMEMBER;

                ret = e_passwords_ask_password (
                    title, domain, key, prompt,
                    eflags, &remember, NULL);

                if (!ret)
                    e_passwords_forget_password (domain, key);

                g_free (title);

                if (ret && config_service) {
                    config_service->save_passwd = remember;
                    e_account_list_save (e_get_account_list ());
                }

                if (config_service)
                    config_service->get_password_canceled = ret == NULL;
            }
        }

        g_free (key);
    }

    g_free (url);

    if (ret == NULL)
        g_set_error (
            error, G_IO_ERROR,
            G_IO_ERROR_CANCELLED,
            _("User canceled operation."));

    return ret;
}

static gboolean
mail_session_forget_password (CamelSession *session,
                              CamelService *service,
                              const gchar *domain,
                              const gchar *item,
                              GError **error)
{
    gchar *key;

    domain = (domain != NULL) ? domain : "Mail";
    key = mail_session_make_key (service, item);

    e_passwords_forget_password (domain, key);

    g_free (key);

    return TRUE;
}

static gboolean
mail_session_alert_user (CamelSession *session,
                         CamelSessionAlertType type,
                         const gchar *prompt,
                         gboolean cancel)
{
    struct _user_message_msg *m;
    GCancellable *cancellable;
    gboolean result = TRUE;

    m = mail_msg_new (&user_message_info);
    m->ismain = mail_in_main_thread ();
    m->type = type;
    m->prompt = g_strdup (prompt);
    m->done = e_flag_new ();
    m->allow_cancel = cancel;

    if (cancel)
        mail_msg_ref (m);

    cancellable = e_activity_get_cancellable (m->base.activity);

    if (m->ismain)
        user_message_exec (m, cancellable, &m->base.error);
    else
        mail_msg_main_loop_push (m);

    if (cancel) {
        e_flag_wait (m->done);
        result = m->result;
        mail_msg_unref (m);
    } else if (m->ismain)
        mail_msg_unref (m);

    return result;
}

static CamelFilterDriver *
mail_session_get_filter_driver (CamelSession *session,
                                const gchar *type,
                                GError **error)
{
    return (CamelFilterDriver *) mail_call_main (
        MAIL_CALL_p_ppp, (MailMainFunc) main_get_filter_driver,
        session, type, error);
}

static gboolean
mail_session_lookup_addressbook (CamelSession *session,
                                 const gchar *name)
{
    CamelInternetAddress *addr;
    gboolean ret;

    if (!mail_config_get_lookup_book ())
        return FALSE;

    addr = camel_internet_address_new ();
    camel_address_decode ((CamelAddress *)addr, name);
    ret = em_utils_in_addressbook (
        addr, mail_config_get_lookup_book_local_only ());
    g_object_unref (addr);

    return ret;
}

static gpointer
mail_session_thread_msg_new (CamelSession *session,
                             CamelSessionThreadOps *ops,
                             guint size)
{
    CamelSessionThreadMsg *msg;
    CamelSessionClass *session_class;

    /* TODO This is very temporary, until we have a better way to do
     *      the progress reporting, we just borrow a dummy mail-mt
     *      thread message and hook it onto out camel thread message. */

    /* Chain up to parent's thread_msg_new() method. */
    session_class = CAMEL_SESSION_CLASS (e_mail_session_parent_class);
    msg = session_class->thread_msg_new (session, ops, size);

#if 0
    /* We create a dummy mail_msg, and then copy its cancellation
     * port over to ours, so we get cancellation and progress in
     * common with hte existing mail code, for free. */
    if (msg) {
        MailMsg *m = mail_msg_new (&ms_thread_info_dummy);

        msg->data = m;
        e_activity_set_cancellable (
            m->activity, msg->cancellable);
    }
#endif

    return msg;
}

static void
mail_session_thread_msg_free (CamelSession *session,
                              CamelSessionThreadMsg *msg)
{
    CamelSessionClass *session_class;

#if 0
    mail_msg_unref (msg->data);
#endif

    /* Chain up to parent's thread_msg_free() method. */
    session_class = CAMEL_SESSION_CLASS (e_mail_session_parent_class);
    session_class->thread_msg_free (session, msg);
}

static void
mail_session_thread_status (CamelSession *session,
                            CamelSessionThreadMsg *msg,
                            const gchar *text,
                            gint pc)
{
}

static gboolean
mail_session_forward_to (CamelSession *session,
                         CamelFolder *folder,
                         CamelMimeMessage *message,
                         const gchar *address,
                         GError **error)
{
    EAccount *account;
    CamelMimeMessage *forward;
    CamelStream *mem;
    CamelInternetAddress *addr;
    CamelFolder *out_folder;
    CamelMessageInfo *info;
    CamelMedium *medium;
    const gchar *header_name;
    struct _camel_header_raw *xev;
    gchar *subject;

    g_return_val_if_fail (folder != NULL, FALSE);
    g_return_val_if_fail (message != NULL, FALSE);
    g_return_val_if_fail (address != NULL, FALSE);

    if (!*address) {
        g_set_error (
            error, CAMEL_ERROR, CAMEL_ERROR_GENERIC,
            _("No destination address provided, forward "
              "of the message has been cancelled."));
        return FALSE;
    }

    account = em_utils_guess_account_with_recipients (message, folder);
    if (!account) {
        g_set_error (
            error, CAMEL_ERROR, CAMEL_ERROR_GENERIC,
            _("No account found to use, forward of the "
              "message has been cancelled."));
        return FALSE;
    }

    forward = camel_mime_message_new ();

    /* make copy of the message, because we are going to modify it */
    mem = camel_stream_mem_new ();
    camel_data_wrapper_write_to_stream_sync (
        CAMEL_DATA_WRAPPER (message), mem, NULL, NULL);
    g_seekable_seek (G_SEEKABLE (mem), 0, G_SEEK_SET, NULL, NULL);
    camel_data_wrapper_construct_from_stream_sync (
        CAMEL_DATA_WRAPPER (forward), mem, NULL, NULL);
    g_object_unref (mem);

    /* clear previous recipients */
    camel_mime_message_set_recipients (
        forward, CAMEL_RECIPIENT_TYPE_TO, NULL);
    camel_mime_message_set_recipients (
        forward, CAMEL_RECIPIENT_TYPE_CC, NULL);
    camel_mime_message_set_recipients (
        forward, CAMEL_RECIPIENT_TYPE_BCC, NULL);
    camel_mime_message_set_recipients (
        forward, CAMEL_RECIPIENT_TYPE_RESENT_TO, NULL);
    camel_mime_message_set_recipients (
        forward, CAMEL_RECIPIENT_TYPE_RESENT_CC, NULL);
    camel_mime_message_set_recipients (
        forward, CAMEL_RECIPIENT_TYPE_RESENT_BCC, NULL);

    medium = CAMEL_MEDIUM (forward);

    /* remove all delivery and notification headers */
    header_name = "Disposition-Notification-To";
    while (camel_medium_get_header (medium, header_name))
        camel_medium_remove_header (medium, header_name);

    header_name = "Delivered-To";
    while (camel_medium_get_header (medium, header_name))
        camel_medium_remove_header (medium, header_name);

    /* remove any X-Evolution-* headers that may have been set */
    xev = mail_tool_remove_xevolution_headers (forward);
    camel_header_raw_clear (&xev);

    /* from */
    addr = camel_internet_address_new ();
    camel_internet_address_add (
        addr, account->id->name, account->id->address);
    camel_mime_message_set_from (forward, addr);
    g_object_unref (addr);

    /* to */
    addr = camel_internet_address_new ();
    camel_address_decode (CAMEL_ADDRESS (addr), address);
    camel_mime_message_set_recipients (
        forward, CAMEL_RECIPIENT_TYPE_TO, addr);
    g_object_unref (addr);

    /* subject */
    subject = mail_tool_generate_forward_subject (message);
    camel_mime_message_set_subject (forward, subject);
    g_free (subject);

    /* and send it */
    info = camel_message_info_new (NULL);
    out_folder = e_mail_local_get_folder (E_MAIL_LOCAL_FOLDER_OUTBOX);
    camel_message_info_set_flags (
        info, CAMEL_MESSAGE_SEEN, CAMEL_MESSAGE_SEEN);

    /* FIXME Pass a GCancellable. */
    e_mail_folder_append_message (
        out_folder, forward, info, G_PRIORITY_DEFAULT, NULL,
        (GAsyncReadyCallback) ms_forward_to_cb, session);

    camel_message_info_free (info);

    return TRUE;
}

static void
e_mail_session_class_init (EMailSessionClass *class)
{
    GObjectClass *object_class;
    CamelSessionClass *session_class;

    g_type_class_add_private (class, sizeof (EMailSessionPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->get_property = mail_session_get_property;
    object_class->dispose = mail_session_dispose;
    object_class->finalize = mail_session_finalize;

    session_class = CAMEL_SESSION_CLASS (class);
    session_class->get_password = mail_session_get_password;
    session_class->forget_password = mail_session_forget_password;
    session_class->alert_user = mail_session_alert_user;
    session_class->get_filter_driver = mail_session_get_filter_driver;
    session_class->lookup_addressbook = mail_session_lookup_addressbook;
    session_class->thread_msg_new = mail_session_thread_msg_new;
    session_class->thread_msg_free = mail_session_thread_msg_free;
    session_class->thread_status = mail_session_thread_status;
    session_class->forward_to = mail_session_forward_to;

    g_object_class_install_property (
        object_class,
        PROP_FOLDER_CACHE,
        g_param_spec_object (
            "folder-cache",
            NULL,
            NULL,
            MAIL_TYPE_FOLDER_CACHE,
            G_PARAM_READABLE));
}

static void
e_mail_session_init (EMailSession *session)
{
    GConfClient *client;

    session->priv = G_TYPE_INSTANCE_GET_PRIVATE (
        session, E_TYPE_MAIL_SESSION, EMailSessionPrivate);
    session->priv->folder_cache = mail_folder_cache_new ();

    /* Initialize the EAccount setup. */
    e_account_writable (NULL, E_ACCOUNT_SOURCE_SAVE_PASSWD);

    client = gconf_client_get_default ();

    gconf_client_add_dir (
        client, "/apps/evolution/mail/junk",
        GCONF_CLIENT_PRELOAD_ONELEVEL, NULL);
    camel_session_set_check_junk (
        CAMEL_SESSION (session), gconf_client_get_bool (
        client, "/apps/evolution/mail/junk/check_incoming", NULL));
    session_check_junk_notify_id = gconf_client_notify_add (
        client, "/apps/evolution/mail/junk",
        (GConfClientNotifyFunc) mail_session_check_junk_notify,
        session, NULL, NULL);
    CAMEL_SESSION (session)->junk_plugin = NULL;

    mail_config_reload_junk_headers (session);

    init_socks_proxy (CAMEL_SESSION (session));

    g_object_unref (client);
}

EMailSession *
e_mail_session_new (void)
{
    const gchar *user_data_dir;

    user_data_dir = mail_session_get_data_dir ();

    return g_object_new (
        E_TYPE_MAIL_SESSION,
        "user-data-dir", user_data_dir, NULL);
}

MailFolderCache *
e_mail_session_get_folder_cache (EMailSession *session)
{
    g_return_val_if_fail (E_IS_MAIL_SESSION (session), NULL);

    return session->priv->folder_cache;
}

static void
mail_session_get_inbox_thread (GSimpleAsyncResult *simple,
                               EMailSession *session,
                               GCancellable *cancellable)
{
    AsyncContext *context;
    GError *error = NULL;

    context = g_simple_async_result_get_op_res_gpointer (simple);

    context->folder = e_mail_session_get_inbox_sync (
        session, context->uid, cancellable, &error);

    if (error != NULL) {
        g_simple_async_result_set_from_error (simple, error);
        g_error_free (error);
    }
}

CamelFolder *
e_mail_session_get_inbox_sync (EMailSession *session,
                               const gchar *service_uid,
                               GCancellable *cancellable,
                               GError **error)
{
    CamelService *service;

    g_return_val_if_fail (E_IS_MAIL_SESSION (session), NULL);
    g_return_val_if_fail (service_uid != NULL, NULL);

    service = camel_session_get_service (
        CAMEL_SESSION (session), service_uid);

    if (!CAMEL_IS_STORE (service))
        return NULL;

    if (!camel_service_connect_sync (service, error))
        return NULL;

    return camel_store_get_inbox_folder_sync (
        CAMEL_STORE (service), cancellable, error);
}

void
e_mail_session_get_inbox (EMailSession *session,
                          const gchar *service_uid,
                          gint io_priority,
                          GCancellable *cancellable,
                          GAsyncReadyCallback callback,
                          gpointer user_data)
{
    GSimpleAsyncResult *simple;
    AsyncContext *context;

    g_return_if_fail (E_IS_MAIL_SESSION (session));
    g_return_if_fail (service_uid != NULL);

    context = g_slice_new0 (AsyncContext);
    context->uid = g_strdup (service_uid);

    simple = g_simple_async_result_new (
        G_OBJECT (session), callback,
        user_data, e_mail_session_get_inbox);

    g_simple_async_result_set_op_res_gpointer (
        simple, context, (GDestroyNotify) async_context_free);

    g_simple_async_result_run_in_thread (
        simple, (GSimpleAsyncThreadFunc)
        mail_session_get_inbox_thread,
        io_priority, cancellable);

    g_object_unref (simple);
}

CamelFolder *
e_mail_session_get_inbox_finish (EMailSession *session,
                                 GAsyncResult *result,
                                 GError **error)
{
    GSimpleAsyncResult *simple;
    AsyncContext *context;

    g_return_val_if_fail (
        g_simple_async_result_is_valid (
        result, G_OBJECT (session),
        e_mail_session_get_inbox), NULL);

    simple = G_SIMPLE_ASYNC_RESULT (result);
    context = g_simple_async_result_get_op_res_gpointer (simple);

    if (g_simple_async_result_propagate_error (simple, error))
        return NULL;

    g_return_val_if_fail (CAMEL_IS_FOLDER (context->folder), NULL);

    return g_object_ref (context->folder);
}

static void
mail_session_get_trash_thread (GSimpleAsyncResult *simple,
                               EMailSession *session,
                               GCancellable *cancellable)
{
    AsyncContext *context;
    GError *error = NULL;

    context = g_simple_async_result_get_op_res_gpointer (simple);

    context->folder = e_mail_session_get_trash_sync (
        session, context->uid, cancellable, &error);

    if (error != NULL) {
        g_simple_async_result_set_from_error (simple, error);
        g_error_free (error);
    }
}

CamelFolder *
e_mail_session_get_trash_sync (EMailSession *session,
                               const gchar *service_uid,
                               GCancellable *cancellable,
                               GError **error)
{
    CamelService *service;

    g_return_val_if_fail (E_IS_MAIL_SESSION (session), NULL);
    g_return_val_if_fail (service_uid != NULL, NULL);

    service = camel_session_get_service (
        CAMEL_SESSION (session), service_uid);

    if (!CAMEL_IS_STORE (service))
        return NULL;

    if (!camel_service_connect_sync (service, error))
        return NULL;

    return camel_store_get_trash_folder_sync (
        CAMEL_STORE (service), cancellable, error);
}

void
e_mail_session_get_trash (EMailSession *session,
                          const gchar *service_uid,
                          gint io_priority,
                          GCancellable *cancellable,
                          GAsyncReadyCallback callback,
                          gpointer user_data)
{
    GSimpleAsyncResult *simple;
    AsyncContext *context;

    g_return_if_fail (E_IS_MAIL_SESSION (session));
    g_return_if_fail (service_uid != NULL);

    context = g_slice_new0 (AsyncContext);
    context->uid = g_strdup (service_uid);

    simple = g_simple_async_result_new (
        G_OBJECT (session), callback,
        user_data, e_mail_session_get_trash);

    g_simple_async_result_set_op_res_gpointer (
        simple, context, (GDestroyNotify) async_context_free);

    g_simple_async_result_run_in_thread (
        simple, (GSimpleAsyncThreadFunc)
        mail_session_get_trash_thread,
        io_priority, cancellable);

    g_object_unref (simple);
}

CamelFolder *
e_mail_session_get_trash_finish (EMailSession *session,
                                 GAsyncResult *result,
                                 GError **error)
{
    GSimpleAsyncResult *simple;
    AsyncContext *context;

    g_return_val_if_fail (
        g_simple_async_result_is_valid (
        result, G_OBJECT (session),
        e_mail_session_get_trash), NULL);

    simple = G_SIMPLE_ASYNC_RESULT (result);
    context = g_simple_async_result_get_op_res_gpointer (simple);

    if (g_simple_async_result_propagate_error (simple, error))
        return NULL;

    g_return_val_if_fail (CAMEL_IS_FOLDER (context->folder), NULL);

    return g_object_ref (context->folder);
}

static void
mail_session_uri_to_folder_thread (GSimpleAsyncResult *simple,
                                   EMailSession *session,
                                   GCancellable *cancellable)
{
    AsyncContext *context;
    GError *error = NULL;

    context = g_simple_async_result_get_op_res_gpointer (simple);

    context->folder = e_mail_session_uri_to_folder_sync (
        session, context->uri, context->flags,
        cancellable, &error);

    if (error != NULL) {
        g_simple_async_result_set_from_error (simple, error);
        g_error_free (error);
    }
}

CamelFolder *
e_mail_session_uri_to_folder_sync (EMailSession *session,
                                   const gchar *folder_uri,
                                   CamelStoreGetFolderFlags flags,
                                   GCancellable *cancellable,
                                   GError **error)
{
    CamelURL *url;
    CamelService *service;
    CamelFolder *folder = NULL;
    gchar *camel_uri = NULL;
    gboolean vtrash = FALSE;
    gboolean vjunk = FALSE;

    g_return_val_if_fail (E_IS_MAIL_SESSION (session), NULL);
    g_return_val_if_fail (folder_uri != NULL, NULL);

    url = camel_url_new (folder_uri, NULL);
    g_return_val_if_fail (url, NULL);

    /* url->path[1] skips the leading "/" */
    camel_operation_push_message (
        cancellable, _("Opening folder '%s'"), &url->path[1]);

    /* FIXME vtrash and vjunk are no longer used for these URI's. */
    if (g_str_has_prefix (folder_uri, "vtrash:")) {
        folder_uri += 7;
        vtrash = TRUE;
    } else if (g_str_has_prefix (folder_uri, "vjunk:")) {
        folder_uri += 6;
        vjunk = TRUE;
    } else if (g_str_has_prefix (folder_uri, "email:")) {
        /* FIXME Shouldn't the filter:get_folder
         *       callback do this itself? */
        camel_uri = em_uri_to_camel (folder_uri);
        if (camel_uri == NULL) {
            g_set_error (
                error, CAMEL_ERROR, CAMEL_ERROR_GENERIC,
                _("Invalid folder: %s"), &url->path[1]);
            goto exit;
        }
        folder_uri = camel_uri;
    }
    camel_url_free (url);

    url = camel_url_new (folder_uri, error);

    if (url == NULL) {
        g_free (camel_uri);
        goto exit;
    }

    service = camel_session_get_service_by_url (
        CAMEL_SESSION (session), url);

    if (CAMEL_IS_STORE (service)) {
        const gchar *name = "";

        /* If we have a fragment, then the path is actually
         * used by the store, so the fragment is the path to
         * the folder instead. */
        if (url->fragment != NULL)
            name = url->fragment;
        else if (url->path != NULL && *url->path != '\0')
            name = url->path + 1;

        if (vtrash)
            folder = camel_store_get_trash_folder_sync (
                CAMEL_STORE (service), cancellable, error);
        else if (vjunk)
            folder = camel_store_get_junk_folder_sync (
                CAMEL_STORE (service), cancellable, error);
        else
            folder = camel_store_get_folder_sync (
                CAMEL_STORE (service), name,
                flags, cancellable, error);
    }

    if (folder != NULL) {
        MailFolderCache *folder_cache;

        folder_cache = e_mail_session_get_folder_cache (session);
        mail_folder_cache_note_folder (folder_cache, folder);
    }

    camel_url_free (url);
    g_free (camel_uri);

exit:
    camel_operation_pop_message (cancellable);

    return folder;
}

void
e_mail_session_uri_to_folder (EMailSession *session,
                              const gchar *folder_uri,
                              CamelStoreGetFolderFlags flags,
                              gint io_priority,
                              GCancellable *cancellable,
                              GAsyncReadyCallback callback,
                              gpointer user_data)
{
    GSimpleAsyncResult *simple;
    AsyncContext *context;

    g_return_if_fail (E_IS_MAIL_SESSION (session));
    g_return_if_fail (folder_uri != NULL);

    context = g_slice_new0 (AsyncContext);
    context->uri = g_strdup (folder_uri);
    context->flags = flags;

    simple = g_simple_async_result_new (
        G_OBJECT (session), callback,
        user_data, e_mail_session_uri_to_folder);

    g_simple_async_result_set_op_res_gpointer (
        simple, context, (GDestroyNotify) async_context_free);

    g_simple_async_result_run_in_thread (
        simple, (GSimpleAsyncThreadFunc)
        mail_session_uri_to_folder_thread,
        io_priority, cancellable);

    g_object_unref (simple);
}

CamelFolder *
e_mail_session_uri_to_folder_finish (EMailSession *session,
                                     GAsyncResult *result,
                                     GError **error)
{
    GSimpleAsyncResult *simple;
    AsyncContext *context;

    g_return_val_if_fail (
        g_simple_async_result_is_valid (
        result, G_OBJECT (session),
        e_mail_session_uri_to_folder), NULL);

    simple = G_SIMPLE_ASYNC_RESULT (result);
    context = g_simple_async_result_get_op_res_gpointer (simple);

    if (g_simple_async_result_propagate_error (simple, error))
        return NULL;

    g_return_val_if_fail (CAMEL_IS_FOLDER (context->folder), NULL);

    return g_object_ref (context->folder);
}

/******************************** Legacy API *********************************/

void
mail_session_flush_filter_log (EMailSession *session)
{
    g_return_if_fail (E_IS_MAIL_SESSION (session));

    if (session->priv->filter_logfile)
        fflush (session->priv->filter_logfile);
}

void
mail_session_add_junk_plugin (EMailSession *session,
                              const gchar *plugin_name,
                              CamelJunkPlugin *junk_plugin)
{
    GConfClient *client;
    gchar *def_plugin;
    const gchar *key;

    g_return_if_fail (E_IS_MAIL_SESSION (session));

    client = gconf_client_get_default ();
    key = "/apps/evolution/mail/junk/default_plugin";
    def_plugin = gconf_client_get_string (client, key, NULL);
    g_object_unref (client);

    session->priv->junk_plugins = g_list_append (
        session->priv->junk_plugins, junk_plugin);
    if (def_plugin && plugin_name) {
        if (!strcmp (def_plugin, plugin_name)) {
            CAMEL_SESSION (session)->junk_plugin = junk_plugin;
            camel_junk_plugin_init (junk_plugin);
        }
    }

    g_free (def_plugin);
}

const GList *
mail_session_get_junk_plugins (EMailSession *session)
{
    g_return_val_if_fail (E_IS_MAIL_SESSION (session), NULL);

    return session->priv->junk_plugins;
}

const gchar *
mail_session_get_data_dir (void)
{
    if (G_UNLIKELY (mail_data_dir == NULL))
        mail_data_dir = g_build_filename (
            e_get_user_data_dir (), "mail", NULL);

    return mail_data_dir;
}

const gchar *
mail_session_get_config_dir (void)
{
    if (G_UNLIKELY (mail_config_dir == NULL))
        mail_config_dir = g_build_filename (
            e_get_user_config_dir (), "mail", NULL);

    return mail_config_dir;
}