path: root/mail/mail-component.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* mail-component.c
 *
 * Copyright (C) 2003  Ximian Inc.
 *
 * Authors: Ettore Perazzoli <ettore@ximian.com>
 *      Michael Zucchi <notzed@ximian.com>
 *      Jeffrey Stedfast <fejj@ximian.com>
 *
 * This  program is free  software; you  can redistribute  it and/or
 * modify it under the terms of version 2  of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * 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.
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>

#include "em-popup.h"
#include "em-utils.h"
#include "em-format.h"
#include "em-folder-tree.h"
#include "em-folder-browser.h"
#include "em-folder-selector.h"
#include "em-folder-selection.h"
#include "em-migrate.h"

#include "widgets/misc/e-info-label.h"

#include "filter/rule-context.h"
#include "mail-config.h"
#include "mail-component.h"
#include "mail-folder-cache.h"
#include "mail-vfolder.h"
#include "mail-mt.h"
#include "mail-ops.h"
#include "mail-tools.h"
#include "mail-send-recv.h"
#include "mail-session.h"
#include "mail-offline-handler.h"

#include "e-activity-handler.h"

#include "composer/e-msg-composer.h"

#include "e-task-bar.h"

#include <gtk/gtklabel.h>

#include <e-util/e-mktemp.h>
#include <e-util/e-dialog-utils.h>

#include <gal/e-table/e-tree.h>
#include <gal/e-table/e-tree-memory.h>

#include <camel/camel.h>
#include <camel/camel-file-utils.h>

#include <bonobo/bonobo-control.h>
#include <bonobo/bonobo-widget.h>

#define d(x) 

#define MAIL_COMPONENT_DEFAULT(mc) if (mc == NULL) mc = mail_component_peek();

#define PARENT_TYPE bonobo_object_get_type ()
static BonoboObjectClass *parent_class = NULL;

struct _store_info {    
    CamelStore *store;
    char *name;

    /* we keep a reference to these so they remain around for the session */
    CamelFolder *vtrash;
    CamelFolder *vjunk;
};

struct _MailComponentPrivate {
    GMutex *lock;

    /* states/data used during shutdown */
    enum { MC_QUIT_START, MC_QUIT_SYNC } quit_state;
    int quit_count;

    char *base_directory;
    
    EMFolderTreeModel *model;

    EActivityHandler *activity_handler;
    
    MailAsyncEvent *async_event;
    GHashTable *store_hash; /* stores store_info objects by store */
    
    RuleContext *search_context;
    
    char *context_path; /* current path for right-click menu */
    
    CamelStore *local_store;
};

/* indexed by _mail_component_folder_t */
static struct {
    char *name;
    char *uri;
    CamelFolder *folder;
} mc_default_folders[] = {
    { "Inbox", },
    { "Drafts", },
    { "Outbox", },
    { "Sent", },
    { "Inbox", },       /* 'always local' inbox */
};

static struct _store_info *
store_info_new(CamelStore *store, const char *name)
{
    struct _store_info *si;

    si = g_malloc0(sizeof(*si));
    if (name == NULL)
        si->name = camel_service_get_name((CamelService *)store, TRUE);
    else
        si->name = g_strdup(name);
    si->store = store;
    camel_object_ref(store);
    si->vtrash = camel_store_get_trash(store, NULL);
    si->vjunk = camel_store_get_junk(store, NULL);

    return si;
}

static void
store_info_free(struct _store_info *si)
{
    if (si->vtrash)
        camel_object_unref(si->vtrash);
    if (si->vjunk)
        camel_object_unref(si->vjunk);
    camel_object_unref(si->store);
    g_free(si->name);
    g_free(si);
}

/* Utility functions.  */
static void
mc_add_store(MailComponent *component, CamelStore *store, const char *name, void (*done)(CamelStore *store, CamelFolderInfo *info, void *data))
{
    struct _store_info *si;

    MAIL_COMPONENT_DEFAULT(component);

    si = store_info_new(store, name);
    g_hash_table_insert(component->priv->store_hash, store, si);
    em_folder_tree_model_add_store(component->priv->model, store, si->name);
    mail_note_store(store, NULL, done, component);
}

static void
mc_add_local_store_done(CamelStore *store, CamelFolderInfo *info, void *data)
{
    /*MailComponent *mc = data;*/
    int i;

    for (i=0;i<sizeof(mc_default_folders)/sizeof(mc_default_folders[0]);i++) {
        if (mc_default_folders[i].folder)
            mail_note_folder(mc_default_folders[i].folder);
    }
}

static void
mc_add_local_store(CamelStore *store, const char *name, MailComponent *mc)
{
    mc_add_store(mc, store, name, mc_add_local_store_done);
    camel_object_unref(store);
    g_object_unref(mc);
}

static void
mc_setup_local_store(MailComponent *mc)
{
    MailComponentPrivate *p = mc->priv;
    CamelURL *url;
    char *tmp;
    CamelException ex;
    int i;

    g_mutex_lock(p->lock);
    if (p->local_store != NULL) {
        g_mutex_unlock(p->lock);
        return;
    }

    camel_exception_init(&ex);

    url = camel_url_new("mbox:", NULL);
    tmp = g_strdup_printf("%s/mail/local", p->base_directory);
    camel_url_set_path(url, tmp);
    g_free(tmp);
    tmp = camel_url_to_string(url, 0);
    p->local_store = (CamelStore *)camel_session_get_service(session, tmp, CAMEL_PROVIDER_STORE, &ex);
    g_free(tmp);
    if (p->local_store == NULL)
        goto fail;

    for (i=0;i<sizeof(mc_default_folders)/sizeof(mc_default_folders[0]);i++) {
        /* FIXME: should this uri be account relative? */
        camel_url_set_fragment(url, mc_default_folders[i].name);
        mc_default_folders[i].uri = camel_url_to_string(url, 0);
        mc_default_folders[i].folder = camel_store_get_folder(p->local_store, mc_default_folders[i].name,
                                      CAMEL_STORE_FOLDER_CREATE, &ex);
        camel_exception_clear(&ex);
    }

    camel_url_free(url);
    g_mutex_unlock(p->lock);

    g_object_ref(mc);
    camel_object_ref(p->local_store);
    mail_async_event_emit(p->async_event, MAIL_ASYNC_GUI, (MailAsyncFunc)mc_add_local_store, p->local_store, _("On This Computer"), mc);

    return;
fail:
    g_mutex_unlock(p->lock);

    g_warning("Could not setup local store/folder: %s", ex.desc);

    camel_url_free(url);
    camel_exception_clear(&ex);
}

static void
load_accounts (MailComponent *component, EAccountList *accounts)
{
    EIterator *iter;

    /* Load each service (don't connect!). Check its provider and
     * see if this belongs in the shell's folder list. If so, add
     * it.
     */
    
    iter = e_list_get_iterator ((EList *) accounts);
    while (e_iterator_is_valid (iter)) {
        EAccountService *service;
        EAccount *account;
        const char *name;
        
        account = (EAccount *) e_iterator_get (iter);
        service = account->source;
        name = account->name;

        /* HACK: mbox url's are handled by the local store setup above,
           any that come through as account sources are really movemail sources! */
        if (account->enabled
            && service->url != NULL
            && strncmp(service->url, "mbox:", 5) != 0)
            mail_component_load_store_by_uri (component, service->url, name);
        
        e_iterator_next (iter);
    }
    
    g_object_unref (iter);
}

static void
setup_search_context (MailComponent *component)
{
    MailComponentPrivate *priv = component->priv;

    if (priv->search_context == NULL) {
        char *user = g_build_filename(component->priv->base_directory, "mail/searches.xml", NULL);
        char *system = g_strdup (EVOLUTION_PRIVDATADIR "/searchtypes.xml");
    
        priv->search_context = rule_context_new ();
        g_object_set_data_full (G_OBJECT (priv->search_context), "user", user, g_free);
        g_object_set_data_full (G_OBJECT (priv->search_context), "system", system, g_free);
    
        rule_context_add_part_set (priv->search_context, "partset", filter_part_get_type (),
                       rule_context_add_part, rule_context_next_part);
        
        rule_context_add_rule_set (priv->search_context, "ruleset", filter_rule_get_type (),
                       rule_context_add_rule, rule_context_next_rule);
        
        rule_context_load (priv->search_context, system, user);
    }
}

static void
mc_startup(MailComponent *mc)
{
    static int started = 0;

    if (started)
        return;
    started = 1;

    mc_setup_local_store(mc);
    load_accounts(mc, mail_config_get_accounts());
    vfolder_load_storage();
}

static void
folder_selected_cb (EMFolderTree *emft, const char *path, const char *uri, EMFolderView *view)
{
    if (!path || !strcmp (path, "/"))
        em_folder_view_set_folder (view, NULL, NULL);
    else
        em_folder_view_set_folder_uri (view, uri);
}

#define PROPERTY_FOLDER_URI          "folder_uri"
#define PROPERTY_FOLDER_URI_IDX      1

static void
set_prop(BonoboPropertyBag *bag, const BonoboArg *arg, guint arg_id, CORBA_Environment *ev, gpointer user_data)
{
    EMFolderView *view  = (EMFolderView *)bonobo_control_get_widget (user_data);

    switch (arg_id) {
    case PROPERTY_FOLDER_URI_IDX:
        em_folder_view_set_folder_uri (view, BONOBO_ARG_GET_STRING (arg));
        break;
    default:
        g_warning ("Unhandled arg %d\n", arg_id);
        break;
    }
}

static void
get_prop(BonoboPropertyBag *bag, BonoboArg *arg, guint arg_id, CORBA_Environment *ev, gpointer user_data)
{
    GtkWidget *widget = bonobo_control_get_widget (user_data);
    EMFolderView *view = (EMFolderView *)widget;

    switch (arg_id) {
    case PROPERTY_FOLDER_URI_IDX:
        if (view->folder_uri)
            BONOBO_ARG_SET_STRING (arg, view->folder_uri);
        else 
            BONOBO_ARG_SET_STRING (arg, "");
        break;
    default:
        g_warning ("Unhandled arg %d\n", arg_id);
    }
}

static void
view_control_activate_cb (BonoboControl *control, gboolean activate, EMFolderView *view)
{
    BonoboUIComponent *uic;
    
    uic = bonobo_control_get_ui_component (control);
    g_assert (uic != NULL);
    
    if (activate) {
        Bonobo_UIContainer container;
        
        container = bonobo_control_get_remote_ui_container (control, NULL);
        bonobo_ui_component_set_container (uic, container, NULL);
        bonobo_object_release_unref (container, NULL);
        
        g_assert (container == bonobo_ui_component_get_container(uic));
        g_return_if_fail (container != CORBA_OBJECT_NIL);
        
        em_folder_view_activate (view, uic, activate);
    } else {
        em_folder_view_activate (view, uic, activate);
        bonobo_ui_component_unset_container (uic, NULL);
    }
}

/* GObject methods.  */

static void
impl_dispose (GObject *object)
{
    MailComponentPrivate *priv = MAIL_COMPONENT (object)->priv;

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

    if (priv->search_context != NULL) {
        g_object_unref (priv->search_context);
        priv->search_context = NULL;
    }
    
    if (priv->local_store != NULL) {
        camel_object_unref (priv->local_store);
        priv->local_store = NULL;
    }
    
    (* G_OBJECT_CLASS (parent_class)->dispose) (object);
}

static void
store_hash_free (CamelStore *store, struct _store_info *si, void *data)
{
    store_info_free(si);
}

static void
impl_finalize (GObject *object)
{
    MailComponentPrivate *priv = MAIL_COMPONENT (object)->priv;

    g_free (priv->base_directory);
    
    mail_async_event_destroy (priv->async_event);
    
    g_hash_table_foreach (priv->store_hash, (GHFunc)store_hash_free, NULL);
    g_hash_table_destroy (priv->store_hash);
    
    if (mail_async_event_destroy (priv->async_event) == -1) {
        g_warning("Cannot destroy async event: would deadlock");
        g_warning(" system may be unstable at exit");
    }
    
    g_free (priv->context_path);
    g_mutex_free(priv->lock);
    g_free (priv);
    
    (* G_OBJECT_CLASS (parent_class)->finalize) (object);
}

static void
view_on_url (GObject *emitter, const char *url, const char *nice_url, MailComponent *mail_component)
{
    MailComponentPrivate *priv = mail_component->priv;
    
    e_activity_handler_set_message (priv->activity_handler, nice_url);
}

static void
view_changed_cb(EMFolderView *emfv, EInfoLabel *el)
{
    if (emfv->folder) {
        char *tmp, *name;
        guint32 total, unread;

        camel_object_get(emfv->folder, NULL, CAMEL_FOLDER_NAME, &name, CAMEL_FOLDER_TOTAL, &total, CAMEL_FOLDER_UNREAD, &unread, NULL);
        /* Format of text for component information area */
        tmp = g_strdup_printf(_("%d total, %d unread"), total, unread);
        e_info_label_set_info(el, name, tmp);
        g_free(tmp);
        camel_object_free(emfv->folder, CAMEL_FOLDER_NAME, name);
    } else {
        e_info_label_set_info(el, _("Mail"), "");
    }
}

/* Evolution::Component CORBA methods.  */

static void
impl_createControls (PortableServer_Servant servant,
             Bonobo_Control *corba_tree_control,
             Bonobo_Control *corba_view_control,
             Bonobo_Control *corba_statusbar_control,
             CORBA_Environment *ev)
{
    MailComponent *mail_component = MAIL_COMPONENT (bonobo_object_from_servant (servant));
    MailComponentPrivate *priv = mail_component->priv;
    BonoboControl *tree_control;
    BonoboControl *view_control;
    BonoboControl *statusbar_control;
    GtkWidget *tree_widget, *vbox, *info;
    GtkWidget *view_widget;
    GtkWidget *statusbar_widget;

    mail_session_set_interactive(TRUE);
    mc_startup(mail_component);

    view_widget = em_folder_browser_new ();
    tree_widget = (GtkWidget *) em_folder_tree_new_with_model (priv->model);
    em_folder_tree_set_excluded((EMFolderTree *)tree_widget, EMFT_EXCLUDE_NOSELECT);
    em_folder_tree_enable_drag_and_drop ((EMFolderTree *) tree_widget);
    em_format_set_session ((EMFormat *) ((EMFolderView *) view_widget)->preview, session);

    g_signal_connect (view_widget, "on-url", G_CALLBACK (view_on_url), mail_component);
    em_folder_view_set_statusbar ((EMFolderView*)view_widget, FALSE);
    
    statusbar_widget = e_task_bar_new ();
    e_activity_handler_attach_task_bar (priv->activity_handler, E_TASK_BAR (statusbar_widget));

    gtk_widget_show (tree_widget);
    gtk_widget_show (view_widget);
    gtk_widget_show (statusbar_widget);

    printf("setting up info area\n");

    vbox = gtk_vbox_new(FALSE, 0);
    info = e_info_label_new("evolution-inbox-mini.png");
    e_info_label_set_info((EInfoLabel *)info, _("Mail"), "");
    gtk_box_pack_start((GtkBox *)vbox, info, FALSE, TRUE, 0);
    gtk_box_pack_start((GtkBox *)vbox, tree_widget, TRUE, TRUE, 0);

    gtk_widget_show(info);
    gtk_widget_show(vbox);

    tree_control = bonobo_control_new (vbox);
    view_control = bonobo_control_new (view_widget);
    statusbar_control = bonobo_control_new (statusbar_widget);
    
    *corba_tree_control = CORBA_Object_duplicate (BONOBO_OBJREF (tree_control), ev);
    *corba_view_control = CORBA_Object_duplicate (BONOBO_OBJREF (view_control), ev);
    *corba_statusbar_control = CORBA_Object_duplicate (BONOBO_OBJREF (statusbar_control), ev);
    
    g_signal_connect (view_control, "activate", G_CALLBACK (view_control_activate_cb), view_widget);
    g_signal_connect (tree_widget, "folder-selected", G_CALLBACK (folder_selected_cb), view_widget);

    g_signal_connect(view_widget, "changed", G_CALLBACK(view_changed_cb), info);
    g_signal_connect(view_widget, "loaded", G_CALLBACK(view_changed_cb), info);
}

static CORBA_boolean
impl_requestQuit(PortableServer_Servant servant, CORBA_Environment *ev)
{
    /*MailComponent *mc = MAIL_COMPONENT(bonobo_object_from_servant(servant));*/
    CamelFolder *folder;

    if (!e_msg_composer_request_close_all())
        return FALSE;
    
    folder = mc_default_folders[MAIL_COMPONENT_FOLDER_OUTBOX].folder;
    if (folder != NULL
        && camel_folder_get_message_count(folder) != 0
        && camel_session_is_online(session)) {
        GtkWidget *dialog;
        guint resp;

        /* FIXME: HIG? */
        dialog = gtk_message_dialog_new(NULL, 0, GTK_MESSAGE_INFO, GTK_BUTTONS_YES_NO,
                        _("You have unsent messages, do you wish to quit anyway?"));
        gtk_dialog_set_default_response((GtkDialog *)dialog, GTK_RESPONSE_NO);
        resp = gtk_dialog_run((GtkDialog *)dialog);
        gtk_widget_destroy(dialog);

        if (resp != GTK_RESPONSE_YES)
            return FALSE;
    }

    return TRUE;
}

static void
mc_quit_sync_done(CamelStore *store, void *data)
{
    MailComponent *mc = data;

    mc->priv->quit_count--;
}

static void
mc_quit_sync(CamelStore *store, struct _store_info *si, MailComponent *mc)
{
    GConfClient *gconf = mail_config_get_gconf_client();
    gboolean expunge;
    int now = time(NULL)/60/60/24, days;

    expunge = gconf_client_get_bool(gconf, "/apps/evolution/mail/trash/empty_on_exit", NULL)
        && ((days = gconf_client_get_int(gconf, "/apps/evolution/mail/trash/empty_on_exit_days", NULL)) == 0
             || (days + gconf_client_get_int(gconf, "/apps/evolution/mail/trash/empty_date", NULL)) <= now);

    mc->priv->quit_count++;
    mail_sync_store(store, expunge, mc_quit_sync_done, mc);

    if (expunge)
        gconf_client_set_int(gconf, "/apps/evolution/mail/trash/empty_date", now, NULL);
}

static CORBA_boolean
impl_quit(PortableServer_Servant servant, CORBA_Environment *ev)
{
    MailComponent *mc = MAIL_COMPONENT(bonobo_object_from_servant(servant));

    switch (mc->priv->quit_state) {
    case MC_QUIT_START:
        g_hash_table_foreach(mc->priv->store_hash, (GHFunc)mc_quit_sync, mc);
        mc->priv->quit_state = MC_QUIT_SYNC;
        /* Falls through */
    case MC_QUIT_SYNC:
        return mc->priv->quit_count == 0;
        /* What else do we need to do at quit time? */
    }

    return TRUE;
}

static GNOME_Evolution_CreatableItemTypeList *
impl__get_userCreatableItems (PortableServer_Servant servant, CORBA_Environment *ev)
{
    GNOME_Evolution_CreatableItemTypeList *list = GNOME_Evolution_CreatableItemTypeList__alloc ();

    list->_length  = 2;
    list->_maximum = list->_length;
    list->_buffer  = GNOME_Evolution_CreatableItemTypeList_allocbuf (list->_length);

    CORBA_sequence_set_release (list, FALSE);

    list->_buffer[0].id = "message";
    list->_buffer[0].description = _("New Mail Message");
    list->_buffer[0].menuDescription = _("_Mail Message");
    list->_buffer[0].tooltip = _("Compose a new mail message");
    list->_buffer[0].menuShortcut = 'm';
    list->_buffer[0].iconName = "new-message.xpm";
    list->_buffer[0].type = GNOME_Evolution_CREATABLE_OBJECT;

    list->_buffer[1].id = "folder";
    list->_buffer[1].description = _("New Mail Folder");
    list->_buffer[1].menuDescription = _("Mail _Folder");
    list->_buffer[1].tooltip = _("Create a new mail folder");
    list->_buffer[1].menuShortcut = 'f';
    list->_buffer[1].iconName = "folder-mini.png";
    list->_buffer[1].type = GNOME_Evolution_CREATABLE_FOLDER;

    return list;
}

static void
emc_new_folder_response(EMFolderSelector *emfs, int response, MailComponent *mc)
{
    const char *uri, *path;
    
    if (response != GTK_RESPONSE_OK) {
        gtk_widget_destroy((GtkWidget *)emfs);
        return;
    }
    
    uri = em_folder_selector_get_selected_uri(emfs);
    path = em_folder_selector_get_selected_path(emfs);
    
    if (em_folder_tree_create_folder(emfs->emft, path, uri))
        gtk_widget_destroy((GtkWidget *)emfs);
}

static void
impl_requestCreateItem (PortableServer_Servant servant,
            const CORBA_char *item_type_name,
            CORBA_Environment *ev)
{
    MailComponent *mc = MAIL_COMPONENT(bonobo_object_from_servant(servant));

    if (strcmp(item_type_name, "message") == 0) {
        if (!em_utils_check_user_can_send_mail(NULL))
            return;
    
        em_utils_compose_new_message ();
    } else if (strcmp(item_type_name, "folder") == 0) {
        /* This api is fucked up, too tightly integrated with the tree view */
        EMFolderTree *folder_tree;
        GtkWidget *dialog;
        
        folder_tree = (EMFolderTree *) em_folder_tree_new_with_model(mc->priv->model);
        dialog = em_folder_selector_create_new (folder_tree, 0, _("Create folder"), _("Specify where to create the folder:"));
        /* We need to get this from the currently activated component?
          em_folder_selector_set_selected ((EMFolderSelector *) dialog, emft->priv->selected_uri);*/
        g_signal_connect (dialog, "response", G_CALLBACK(emc_new_folder_response), mc);
        gtk_widget_show(dialog);
    } else {
        CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                     ex_GNOME_Evolution_Component_UnknownType, NULL);
        return;
    }
}

static void
impl_handleURI (PortableServer_Servant servant, const char *uri, CORBA_Environment *ev)
{
    if (!strncmp (uri, "mailto:", 7)) {
        if (!em_utils_check_user_can_send_mail(NULL))
            return;

        em_utils_compose_new_message_with_mailto (uri);
    }
}

static void
impl_sendAndReceive (PortableServer_Servant servant, CORBA_Environment *ev)
{
    mail_send_receive ();
}

static CORBA_boolean
impl_upgradeFromVersion (PortableServer_Servant servant, const short major, const short minor, const short revision, CORBA_Environment *ev)
{
    MailComponent *component;
    CamelException ex;
    int ok;

    component = mail_component_peek ();
    
    camel_exception_init (&ex);
    ok = em_migrate (component->priv->base_directory, major, minor, revision, &ex) != -1;

    /* FIXME: report errors? */
    camel_exception_clear (&ex);

    return ok;
}

/* Initialization.  */

static void
mail_component_class_init (MailComponentClass *class)
{
    POA_GNOME_Evolution_Component__epv *epv = &class->epv;
    GObjectClass *object_class = G_OBJECT_CLASS (class);
    
    parent_class = g_type_class_peek_parent (class);
    
    object_class->dispose  = impl_dispose;
    object_class->finalize = impl_finalize;
    
    epv->createControls          = impl_createControls;
    epv->requestQuit = impl_requestQuit;
    epv->quit = impl_quit;
    epv->_get_userCreatableItems = impl__get_userCreatableItems;
    epv->requestCreateItem       = impl_requestCreateItem;
    epv->handleURI               = impl_handleURI;
    epv->sendAndReceive          = impl_sendAndReceive;
    epv->upgradeFromVersion      = impl_upgradeFromVersion;
}

static void
mail_component_init (MailComponent *component)
{
    MailComponentPrivate *priv;
    MailOfflineHandler *offline;
    
    priv = g_new0 (MailComponentPrivate, 1);
    component->priv = priv;
    
    priv->lock = g_mutex_new();

    priv->base_directory = g_build_filename (g_get_home_dir (), ".evolution", NULL);
    if (camel_mkdir (priv->base_directory, 0777) == -1 && errno != EEXIST)
        abort ();
    
    priv->model = em_folder_tree_model_new (priv->base_directory);
    
    priv->activity_handler = e_activity_handler_new ();
    
    mail_session_init (priv->base_directory);
    
    priv->async_event = mail_async_event_new();
    priv->store_hash = g_hash_table_new (NULL, NULL);
    
    mail_autoreceive_setup();
    
    offline = mail_offline_handler_new();
    bonobo_object_add_interface((BonoboObject *)component, (BonoboObject *)offline);
}

/* Public API.  */
BonoboControl *
mail_control_new (void) 
{
    BonoboControl *view_control;
    GtkWidget *view_widget;
    BonoboPropertyBag *pbag;

    view_widget = em_folder_browser_new ();
    em_folder_view_set_statusbar ((EMFolderView *) view_widget, FALSE);
    gtk_widget_show (view_widget);
    
    view_control = bonobo_control_new (view_widget);
    pbag = bonobo_property_bag_new (get_prop, set_prop, view_control);
  
    bonobo_property_bag_add (pbag,
                 PROPERTY_FOLDER_URI, 
                 PROPERTY_FOLDER_URI_IDX,
                 BONOBO_ARG_STRING,
                 NULL,
                 _("URI of the mail source that the view will display"),
                 0);
    
    bonobo_control_set_properties (view_control,
                       bonobo_object_corba_objref (BONOBO_OBJECT (pbag)),
                       NULL);
    bonobo_object_unref (BONOBO_OBJECT (pbag));
    
    g_signal_connect (view_control, "activate", G_CALLBACK (view_control_activate_cb), view_widget);
    
    return view_control;
}

MailComponent *
mail_component_peek (void)
{
    static MailComponent *component = NULL;

    if (component == NULL)
        component = g_object_new(mail_component_get_type(), NULL);

    return component;
}

const char *
mail_component_peek_base_directory (MailComponent *component)
{
    MAIL_COMPONENT_DEFAULT(component);

    return component->priv->base_directory;
}

RuleContext *
mail_component_peek_search_context (MailComponent *component)
{
    MAIL_COMPONENT_DEFAULT(component);

    setup_search_context(component);

    return component->priv->search_context;
}

EActivityHandler *
mail_component_peek_activity_handler (MailComponent *component)
{
    MAIL_COMPONENT_DEFAULT(component);

    return component->priv->activity_handler;
}

void
mail_component_add_store (MailComponent *component, CamelStore *store, const char *name)
{
    mc_add_store(component, store, name, NULL);
}

/**
 * mail_component_load_store_by_uri:
 * @component: mail component
 * @uri: uri of store
 * @name: name of store (used for display purposes)
 * 
 * Return value: Pointer to the newly added CamelStore.  The caller is supposed
 * to ref the object if it wants to store it.
 **/
CamelStore *
mail_component_load_store_by_uri (MailComponent *component, const char *uri, const char *name)
{
    CamelException ex;
    CamelStore *store;
    CamelProvider *prov;

    MAIL_COMPONENT_DEFAULT(component);
    
    camel_exception_init (&ex);
    
    /* Load the service (don't connect!). Check its provider and
     * see if this belongs in the shell's folder list. If so, add
     * it.
     */
    
    prov = camel_provider_get(uri, &ex);
    if (prov == NULL) {
        /* EPFIXME: real error dialog */
        g_warning ("couldn't get service %s: %s\n", uri,
               camel_exception_get_description (&ex));
        camel_exception_clear (&ex);
        return NULL;
    }
    
    if (!(prov->flags & CAMEL_PROVIDER_IS_STORAGE))
        return NULL;
    
    store = (CamelStore *) camel_session_get_service (session, uri, CAMEL_PROVIDER_STORE, &ex);
    if (store == NULL) {
        /* EPFIXME: real error dialog */
        g_warning ("couldn't get service %s: %s\n", uri,
               camel_exception_get_description (&ex));
        camel_exception_clear (&ex);
        return NULL;
    }

    mail_component_add_store(component, store, name);
    camel_object_unref (store);
    
    return store;
}

static void
store_disconnect (CamelStore *store, void *event_data, void *user_data)
{
    camel_service_disconnect (CAMEL_SERVICE (store), TRUE, NULL);
    camel_object_unref (store);
}

void
mail_component_remove_store (MailComponent *component, CamelStore *store)
{
    MailComponentPrivate *priv;
    struct _store_info *si;

    MAIL_COMPONENT_DEFAULT(component);

    priv = component->priv;

    /* Because the store_hash holds a reference to each store
     * used as a key in it, none of them will ever be gc'ed, meaning
     * any call to camel_session_get_{service,store} with the same
     * URL will always return the same object. So this works.
     */
    
    if (!(si = g_hash_table_lookup (priv->store_hash, store)))
        return;
    
    g_hash_table_remove (priv->store_hash, store);
    store_info_free(si);
    
    /* so i guess potentially we could have a race, add a store while one
       being removed.  ?? */
    mail_note_store_remove (store);
    
    em_folder_tree_model_remove_store (priv->model, store);

    camel_object_ref(store);
    mail_async_event_emit (priv->async_event, MAIL_ASYNC_THREAD, (MailAsyncFunc) store_disconnect, store, NULL, NULL);
}

void
mail_component_remove_store_by_uri (MailComponent *component, const char *uri)
{
    CamelProvider *prov;
    CamelStore *store;

    MAIL_COMPONENT_DEFAULT(component);
    
    if (!(prov = camel_provider_get(uri, NULL)))
        return;
    
    if (!(prov->flags & CAMEL_PROVIDER_IS_STORAGE))
        return;
    
    store = (CamelStore *) camel_session_get_service (session, uri, CAMEL_PROVIDER_STORE, NULL);
    if (store != NULL) {
        mail_component_remove_store (component, store);
        camel_object_unref (store);
    }
}

int
mail_component_get_store_count (MailComponent *component)
{
    MAIL_COMPONENT_DEFAULT(component);

    return g_hash_table_size (component->priv->store_hash);
}

/* need to map from internal struct to external api */
struct _store_foreach_data {
    GHFunc func;
    void *data;
};

static void
mc_stores_foreach(CamelStore *store, struct _store_info *si, struct _store_foreach_data *data)
{
    data->func((void *)store, (void *)si->name, data->data);
}

void
mail_component_stores_foreach (MailComponent *component, GHFunc func, void *user_data)
{
    struct _store_foreach_data data = { func, user_data };

    MAIL_COMPONENT_DEFAULT(component);

    g_hash_table_foreach (component->priv->store_hash, (GHFunc)mc_stores_foreach, &data);
}

void
mail_component_remove_folder (MailComponent *component, CamelStore *store, const char *path)
{
    MAIL_COMPONENT_DEFAULT(component);

    /* FIXME: implement me. but first, am I really even needed? */
}

EMFolderTreeModel *
mail_component_peek_tree_model (MailComponent *component)
{
    MAIL_COMPONENT_DEFAULT(component);

    return component->priv->model;
}

CamelStore *
mail_component_peek_local_store (MailComponent *mc)
{
    MAIL_COMPONENT_DEFAULT (mc);
    mc_setup_local_store (mc);
    
    return mc->priv->local_store;
}

/**
 * mail_component_get_folder:
 * @mc: 
 * @id: 
 * 
 * Get a standard/default folder by id.  This call is thread-safe.
 * 
 * Return value: 
 **/
struct _CamelFolder *
mail_component_get_folder(MailComponent *mc, enum _mail_component_folder_t id)
{
    g_assert(id <= MAIL_COMPONENT_FOLDER_LOCAL_INBOX);

    MAIL_COMPONENT_DEFAULT(mc);
    mc_setup_local_store(mc);

    return mc_default_folders[id].folder;
}

/**
 * mail_component_get_folder_uri:
 * @mc: 
 * @id: 
 * 
 * Get a standard/default folder's uri.  This call is thread-safe.
 * 
 * Return value: 
 **/
const char *
mail_component_get_folder_uri(MailComponent *mc, enum _mail_component_folder_t id)
{
    g_assert(id <= MAIL_COMPONENT_FOLDER_LOCAL_INBOX);

    MAIL_COMPONENT_DEFAULT(mc);
    mc_setup_local_store(mc);

    return mc_default_folders[id].uri;
}

BONOBO_TYPE_FUNC_FULL (MailComponent, GNOME_Evolution_Component, PARENT_TYPE, mail_component)