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/*
 * e-mail-shell-module.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/>  
 *
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include <glib/gi18n.h>
#include <camel/camel-disco-store.h>
#include <camel/camel-offline-store.h>
#include <camel/camel-session.h>
#include <camel/camel-url.h>

#include "e-util/e-account-utils.h"
#include "e-util/e-binding.h"
#include "e-util/e-import.h"
#include "e-util/e-util.h"
#include "shell/e-shell.h"
#include "shell/e-shell-window.h"
#include "composer/e-msg-composer.h"
#include "widgets/misc/e-preferences-window.h"

#include "e-mail-shell-view.h"
#include "e-mail-shell-module.h"
#include "e-mail-shell-module-migrate.h"
#include "e-mail-shell-module-settings.h"

#include "e-mail-browser.h"
#include "e-mail-reader.h"
#include "em-account-prefs.h"
#include "em-composer-prefs.h"
#include "em-composer-utils.h"
#include "em-config.h"
#include "em-event.h"
#include "em-folder-tree-model.h"
#include "em-folder-utils.h"
#include "em-format-hook.h"
#include "em-format-html-display.h"
#include "em-junk-hook.h"
#include "em-mailer-prefs.h"
#include "em-network-prefs.h"
#include "em-utils.h"
#include "mail-config.h"
#include "mail-folder-cache.h"
#include "mail-mt.h"
#include "mail-ops.h"
#include "mail-send-recv.h"
#include "mail-session.h"
#include "mail-vfolder.h"
#include "importers/mail-importer.h"

#define MODULE_NAME     "mail"
#define MODULE_ALIASES      ""
#define MODULE_SCHEMES      "mailto:email"
#define MODULE_SORT_ORDER   200

typedef struct _StoreInfo StoreInfo;

/* XXX Temporary */
CamelStore *vfolder_store;

struct _StoreInfo {
    CamelStore *store;
    gint ref_count;
    gchar *name;

    /* Keep a reference to these so they remain around for the session. */
    CamelFolder *vtrash;
    CamelFolder *vjunk;

    /* Initialization callback. */
    void (*done) (CamelStore *store,
                  CamelFolderInfo *info,
                  gpointer user_data);
    gpointer done_user_data;

    guint removed : 1;
};

/* Module Entry Point */
void e_shell_module_init (GTypeModule *type_module);

/* The array elements correspond to EMailFolderType. */
static struct {
    gchar *name;
    gchar *uri;
    CamelFolder *folder;
} default_local_folders[] = {
    { N_("Inbox") },
    { N_("Drafts") },
    { N_("Outbox") },
    { N_("Sent") },
    { N_("Templates") },
    { "Inbox" }  /* "always local" inbox */
};

/* XXX So many things need the shell module that it's
 *     just easier to make it globally available. */ 
EShellModule *mail_shell_module = NULL;

static GHashTable *store_hash;
static MailAsyncEvent *async_event;
static EMFolderTreeModel *folder_tree_model;
static CamelStore *local_store;

static gint mail_sync_in_progress;
static guint mail_sync_timeout_source_id;

extern gint camel_application_is_exiting;

static StoreInfo *
store_info_new (CamelStore *store,
                const gchar *name)
{
    CamelService *service;
    StoreInfo *si;

    g_return_val_if_fail (CAMEL_IS_STORE (store), NULL);

    service = CAMEL_SERVICE (store);

    si = g_slice_new0 (StoreInfo);
    si->ref_count = 1;

    if (name == NULL)
        si->name = camel_service_get_name (service, TRUE);
    else
        si->name = g_strdup (name);

    si->store = store;
    camel_object_ref (store);

    /* If these are vfolders then they need to be opened now,
     * otherwise they won't keep track of all folders. */
    if (store->flags & CAMEL_STORE_VTRASH)
        si->vtrash = camel_store_get_trash (store, NULL);
    if (store->flags & CAMEL_STORE_VJUNK)
        si->vjunk = camel_store_get_junk (store, NULL);

    return si;
}

static StoreInfo *
store_info_ref (StoreInfo *si)
{
    g_return_val_if_fail (si != NULL, si);
    g_return_val_if_fail (si->ref_count > 0, si);

    g_atomic_int_add (&si->ref_count, 1);

    return si;
}

static void
store_info_unref (StoreInfo *si)
{
    g_return_if_fail (si != NULL);
    g_return_if_fail (si->ref_count > 0);

    if (g_atomic_int_exchange_and_add (&si->ref_count, -1) > 1)
        return;

    if (si->vtrash != NULL)
        camel_object_unref (si->vtrash);
    if (si->vjunk != NULL)
        camel_object_unref (si->vjunk);
    camel_object_unref (si->store);
    g_free (si->name);

    g_slice_free (StoreInfo, si);
}

static void
store_hash_free (StoreInfo *si)
{
    si->removed = 1;
    store_info_unref (si);
}

static gboolean
mail_shell_module_add_store_done (CamelStore *store,
                                  CamelFolderInfo *info,
                                  gpointer user_data)
{
    StoreInfo *si = user_data;

    if (si->done != NULL)
        si->done (store, info, si);

    if (!si->removed) {
        /* Let the counters know about the already-opened
         * junk and trash folders. */
        if (si->vtrash != NULL)
            mail_note_folder (si->vtrash);
        if (si->vjunk != NULL)
            mail_note_folder (si->vjunk);
    }

    store_info_unref (si);

    return TRUE;
}

static void
mail_shell_module_add_store (EShellModule *shell_module,
                             CamelStore *store,
                             const gchar *name,
                             void (*done) (CamelStore *store,
                                           CamelFolderInfo *info,
                                           gpointer user_data))
{
    StoreInfo *si;

    si = store_info_new (store, name);
    si->done = done;
    g_hash_table_insert (store_hash, store, si);

    em_folder_tree_model_add_store (folder_tree_model, store, si->name);

    mail_note_store (
        shell_module, store, NULL,
        mail_shell_module_add_store_done, store_info_ref (si));
}

static void
mail_shell_module_add_local_store_done (CamelStore *store,
                                        CamelFolderInfo *info,
                                        gpointer unused)
{
    gint ii;

    for (ii = 0; ii < G_N_ELEMENTS (default_local_folders); ii++) {
        if (default_local_folders[ii].folder != NULL)
            mail_note_folder (default_local_folders[ii].folder);
    }
}

static void
mail_shell_module_add_local_store (EShellModule *shell_module,
                                   CamelStore *local_store,
                                   const gchar *name)
{
    mail_shell_module_add_store (
        shell_module, local_store, name,
        mail_shell_module_add_local_store_done);
}

static void
mail_shell_module_init_hooks (void)
{
    e_plugin_hook_register_type (em_config_hook_get_type ());
    e_plugin_hook_register_type (em_event_hook_get_type ());
    e_plugin_hook_register_type (em_junk_hook_get_type ());

    /* EMFormat classes must be registered before EMFormatHook. */
    em_format_hook_register_type (em_format_get_type ());
    em_format_hook_register_type (em_format_html_get_type ());
    em_format_hook_register_type (em_format_html_display_get_type ());
    e_plugin_hook_register_type (em_format_hook_get_type ());

    em_junk_hook_register_type (emj_get_type ());
}

static void
mail_shell_module_init_importers (void)
{
    EImportClass *import_class;
    EImportImporter *importer;

    import_class = g_type_class_ref (e_import_get_type ());

    importer = mbox_importer_peek ();
    e_import_class_add_importer (import_class, importer, NULL, NULL);

    importer = elm_importer_peek ();
    e_import_class_add_importer (import_class, importer, NULL, NULL);

    importer = pine_importer_peek ();
    e_import_class_add_importer (import_class, importer, NULL, NULL);
}

static void
mail_shell_module_init_local_store (EShellModule *shell_module)
{
    CamelException ex;
    CamelService *service;
    CamelURL *url;
    const gchar *data_dir;
    gchar *temp;
    gint ii;

    camel_exception_init (&ex);

    url = camel_url_new ("mbox:", NULL);
    data_dir = e_shell_module_get_data_dir (shell_module);
    temp = g_build_filename (data_dir, "local", NULL);
    camel_url_set_path (url, temp);
    g_free (temp);

    temp = camel_url_to_string (url, 0);
    service = camel_session_get_service (
        session, temp, CAMEL_PROVIDER_STORE, &ex);
    g_free (temp);

    if (service == NULL)
        goto fail;

    for (ii = 0; ii < G_N_ELEMENTS (default_local_folders); ii++) {
        /* FIXME Should this URI be account relative? */
        camel_url_set_fragment (url, default_local_folders[ii].name);
        default_local_folders[ii].uri = camel_url_to_string (url, 0);
        default_local_folders[ii].folder = camel_store_get_folder (
            CAMEL_STORE (service), default_local_folders[ii].name,
            CAMEL_STORE_FOLDER_CREATE, &ex);
        camel_exception_clear (&ex);
    }

    camel_url_free (url);

    camel_object_ref (service);
    g_object_ref (shell_module);

    mail_async_event_emit (
        async_event, MAIL_ASYNC_GUI,
        (MailAsyncFunc) mail_shell_module_add_local_store,
        shell_module, service, _("On This Computer"));

    local_store = CAMEL_STORE (service);

    return;

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

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

static void
mail_shell_module_load_accounts (EShellModule *shell_module)
{
    EAccountList *account_list;
    EIterator *iter;

    account_list = e_get_account_list ();

    for (iter = e_list_get_iterator ((EList *) account_list);
        e_iterator_is_valid (iter); e_iterator_next (iter)) {

        EAccountService *service;
        EAccount *account;
        const gchar *name;
        const gchar *url;

        account = (EAccount *) e_iterator_get (iter);
        service = account->source;
        name = account->name;
        url = service->url;

        if (!account->enabled)
            continue;

        if (url == NULL || *url == '\0')
            continue;

        /* HACK: mbox URL's are handled by the local store setup
         *       above.  Any that come through as account sources
         *       are really movemail sources! */
        if (g_str_has_prefix (url, "mbox:"))
            continue;

        e_mail_shell_module_load_store_by_uri (
            shell_module, url, name);
    }

    g_object_unref (iter);
}

static void
mail_shell_module_mail_icon_cb (EShellWindow *shell_window,
                                const gchar *icon_name)
{
    GtkAction *action;

    action = e_shell_window_get_shell_view_action (
        shell_window, MODULE_NAME);
    g_object_set (action, "icon-name", icon_name, NULL);
}

static void
action_mail_folder_new_cb (GtkAction *action,
                           EShellWindow *shell_window)
{
    EMFolderTree *folder_tree = NULL;
    EMailShellSidebar *mail_shell_sidebar;
    EShellSidebar *shell_sidebar;
    EShellView *shell_view;
    const gchar *view_name;

    /* Take care not to unnecessarily load the mail shell view. */
    view_name = e_shell_window_get_active_view (shell_window);
    if (g_strcmp0 (view_name, MODULE_NAME) != 0)
        goto exit;

    shell_view = e_shell_window_get_shell_view (shell_window, view_name);
    shell_sidebar = e_shell_view_get_shell_sidebar (shell_view);

    mail_shell_sidebar = E_MAIL_SHELL_SIDEBAR (shell_sidebar);
    folder_tree = e_mail_shell_sidebar_get_folder_tree (mail_shell_sidebar);

exit:
    em_folder_utils_create_folder (NULL, folder_tree);
}

static void
action_mail_message_new_cb (GtkAction *action,
                            EShellWindow *shell_window)
{
    GtkWindow *window = GTK_WINDOW (shell_window);
    EMailShellSidebar *mail_shell_sidebar;
    EShellSidebar *shell_sidebar;
    EShellView *shell_view;
    EMFolderTree *folder_tree;
    const gchar *view_name;
    gchar *uri = NULL;

    if (!em_utils_check_user_can_send_mail (window))
        return;

    /* Take care not to unnecessarily load the mail shell view. */
    view_name = e_shell_window_get_active_view (shell_window);
    if (g_strcmp0 (view_name, MODULE_NAME) != 0)
        goto exit;

    shell_view = e_shell_window_get_shell_view (shell_window, view_name);
    shell_sidebar = e_shell_view_get_shell_sidebar (shell_view);

    mail_shell_sidebar = E_MAIL_SHELL_SIDEBAR (shell_sidebar);
    folder_tree = e_mail_shell_sidebar_get_folder_tree (mail_shell_sidebar);
    uri = em_folder_tree_get_selected_uri (folder_tree);

exit:
    em_utils_compose_new_message (uri);

    g_free (uri);
}

static GtkActionEntry item_entries[] = {

    { "mail-message-new",
      "mail-message-new",
      NC_("New", "_Mail Message"),
      "<Shift><Control>m",
      N_("Compose a new mail message"),
      G_CALLBACK (action_mail_message_new_cb) }
};

static GtkActionEntry source_entries[] = {

    { "mail-folder-new",
      "folder-new",
      NC_("New", "Mail _Folder"),
      NULL,
      N_("Create a new mail folder"),
      G_CALLBACK (action_mail_folder_new_cb) }
};

static void
mail_shell_module_init_preferences (EShell *shell)
{
    GtkWidget *preferences_window;

    preferences_window = e_shell_get_preferences_window (shell);

    e_preferences_window_add_page (
        E_PREFERENCES_WINDOW (preferences_window),
        "mail-accounts",
        "preferences-mail-accounts",
        _("Mail Accounts"),
        em_account_prefs_new (),
        100);

    e_preferences_window_add_page (
        E_PREFERENCES_WINDOW (preferences_window),
        "mail",
        "preferences-mail",
        _("Mail Preferences"),
        em_mailer_prefs_new (shell),
        300);

    e_preferences_window_add_page (
        E_PREFERENCES_WINDOW (preferences_window),
        "composer",
        "preferences-composer",
        _("Composer Preferences"),
        em_composer_prefs_new (shell),
        400);

    e_preferences_window_add_page (
        E_PREFERENCES_WINDOW (preferences_window),
        "system-network-proxy",
        "preferences-system-network-proxy",
        _("Network Preferences"),
        em_network_prefs_new (),
        500);
}

static void
mail_shell_module_sync_store_done_cb (CamelStore *store,
                                      gpointer user_data)
{
    mail_sync_in_progress--;
}

static void
mail_shell_module_sync_store_cb (CamelStore *store)
{
    if (!camel_application_is_exiting) {
        mail_sync_in_progress++;
        mail_sync_store (
            store, FALSE,
            mail_shell_module_sync_store_done_cb, NULL);
    }
}

static gboolean
mail_shell_module_mail_sync (EShellModule *shell_module)
{
    if (camel_application_is_exiting)
        return FALSE;

    if (mail_sync_in_progress)
        goto exit;

    if (session == NULL || !camel_session_is_online (session))
        goto exit;

    e_mail_shell_module_stores_foreach (
        shell_module, (GHFunc)
        mail_shell_module_sync_store_cb, NULL);

exit:
    return !camel_application_is_exiting;
}

static void
mail_shell_module_notify_online_cb (EShell *shell,
                                    GParamSpec *pspec,
                                    EShellModule *shell_module)
{
    gboolean online;

    online = e_shell_get_online (shell);
    camel_session_set_online (session, online);
}

static void
mail_shell_module_handle_email_uri_cb (gchar *folder_uri,
                                       CamelFolder *folder,
                                       gpointer user_data)
{
    CamelURL *url = user_data;
    const gchar *forward;
    const gchar *reply;
    const gchar *uid;

    if (folder == NULL) {
        g_warning ("Could not open folder '%s'", folder_uri);
        goto exit;
    }

    forward = camel_url_get_param (url, "forward");
    reply = camel_url_get_param (url, "reply");
    uid = camel_url_get_param (url, "uid");

    if (reply != NULL) {
        gint mode;

        if (g_strcmp0 (reply, "all") == 0)
            mode = REPLY_MODE_ALL;
        else if (g_strcmp0 (reply, "list") == 0)
            mode = REPLY_MODE_LIST;
        else
            mode = REPLY_MODE_SENDER;

        em_utils_reply_to_message (folder, uid, NULL, mode, NULL);

    } else if (forward != NULL) {
        GPtrArray *uids;

        uids = g_ptr_array_new ();
        g_ptr_array_add (uids, g_strdup (uid));

        if (g_strcmp0 (forward, "attached") == 0)
            em_utils_forward_attached (folder, uids, folder_uri);
        else if (g_strcmp0 (forward, "inline") == 0)
            em_utils_forward_inline (folder, uids, folder_uri);
        else if (g_strcmp0 (forward, "quoted") == 0)
            em_utils_forward_quoted (folder, uids, folder_uri);
        else
            em_utils_forward_messages (folder, uids, folder_uri);

    } else {
        GtkWidget *browser;

        /* FIXME Should pass in the shell module. */
        browser = e_mail_browser_new (mail_shell_module);
        e_mail_reader_set_folder (
            E_MAIL_READER (browser), folder, folder_uri);
        e_mail_reader_set_message (
            E_MAIL_READER (browser), uid, FALSE);
        gtk_widget_show (browser);
    }

exit:
    camel_url_free (url);
}

static gboolean
mail_shell_module_handle_uri_cb (EShell *shell,
                                 const gchar *uri,
                                 EShellModule *shell_module)
{
    gboolean handled = TRUE;

    if (g_str_has_prefix (uri, "mailto:")) {
        if (em_utils_check_user_can_send_mail (NULL))
            em_utils_compose_new_message_with_mailto (uri, NULL);

    } else if (g_str_has_prefix (uri, "email:")) {
        CamelURL *url;

        url = camel_url_new (uri, NULL);
        if (camel_url_get_param (url, "uid") != NULL) {
            gchar *curi = em_uri_to_camel (uri);

            mail_get_folder (
                curi, 0,
                mail_shell_module_handle_email_uri_cb,
                url, mail_msg_unordered_push);
            g_free (curi);

        } else {
            g_warning ("Email URI's must include a uid parameter");
            camel_url_free (url);
        }
    } else
        handled = FALSE;

    return TRUE;
}

/* Helper for mail_shell_module_prepare_for_[off|on]line_cb() */
static void
mail_shell_store_line_transition_done_cb (CamelStore *store,
                                          gpointer user_data)
{
    EActivity *activity = user_data;

    g_object_unref (activity);
}

/* Helper for mail_shell_module_prepare_for_offline_cb() */
static void
mail_shell_store_prepare_for_offline_cb (CamelService *service,
                                         gpointer unused,
                                         EActivity *activity)
{
    if (CAMEL_IS_DISCO_STORE (service) || CAMEL_IS_OFFLINE_STORE (service))
        mail_store_set_offline (
            CAMEL_STORE (service), TRUE,
            mail_shell_store_line_transition_done_cb,
            g_object_ref (activity));
}

static void
mail_shell_module_prepare_for_offline_cb (EShell *shell,
                                          EActivity *activity,
                                          EShellModule *shell_module)
{
    GList *watched_windows;
    GtkWidget *parent = NULL;
    gboolean synchronize = FALSE;

    watched_windows = e_shell_get_watched_windows (shell);
    if (watched_windows != NULL)
        parent = GTK_WIDGET (watched_windows->data);

    if (e_shell_get_network_available (shell))
        synchronize = em_utils_prompt_user (
            GTK_WINDOW (parent),
            "/apps/evolution/mail/prompts/quick_offline",
            "mail:ask-quick-offline", NULL);

    if (!synchronize) {
        mail_cancel_all ();
        camel_session_set_network_state (session, FALSE);
    }

    e_mail_shell_module_stores_foreach (
        shell_module, (GHFunc)
        mail_shell_store_prepare_for_offline_cb, activity);
}

/* Helper for mail_shell_module_prepare_for_online_cb() */
static void
mail_shell_store_prepare_for_online_cb (CamelService *service,
                                        gpointer unused,
                                        EActivity *activity)
{
    if (CAMEL_IS_DISCO_STORE (service) || CAMEL_IS_OFFLINE_STORE (service))
        mail_store_set_offline (
            CAMEL_STORE (service), FALSE,
            mail_shell_store_line_transition_done_cb,
            g_object_ref (activity));
}

static void
mail_shell_module_prepare_for_online_cb (EShell *shell,
                                         EActivity *activity,
                                         EShellModule *shell_module)
{
    camel_session_set_online (session, TRUE);

    e_mail_shell_module_stores_foreach (
        shell_module, (GHFunc)
        mail_shell_store_prepare_for_online_cb, activity);
}

static void
mail_shell_module_send_receive_cb (EShell *shell,
                                   GtkWindow *parent,
                                   EShellModule *shell_module)
{
    em_utils_clear_get_password_canceled_accounts_flag ();
    mail_send_receive (parent);
}

static void
mail_shell_module_window_weak_notify_cb (EShell *shell,
                                         GObject *where_the_object_was)
{
    g_signal_handlers_disconnect_by_func (
        shell, mail_shell_module_mail_icon_cb,
        where_the_object_was);
}

static void
mail_shell_module_window_created_cb (EShell *shell,
                                     GtkWindow *window,
                                     EShellModule *shell_module)
{
    EShellSettings *shell_settings;
    static gboolean first_time = TRUE;
    const gchar *module_name;

    shell_settings = e_shell_get_shell_settings (shell);

    /* This applies to both the composer and signature editor. */
    if (GTKHTML_IS_EDITOR (window)) {
        GList *spell_languages;

        e_binding_new (
            G_OBJECT (shell_settings), "composer-inline-spelling",
            G_OBJECT (window), "inline-spelling");

        e_binding_new (
            G_OBJECT (shell_settings), "composer-magic-links",
            G_OBJECT (window), "magic-links");

        e_binding_new (
            G_OBJECT (shell_settings), "composer-magic-smileys",
            G_OBJECT (window), "magic-smileys");

        spell_languages = e_load_spell_languages ();
        gtkhtml_editor_set_spell_languages (
            GTKHTML_EDITOR (window), spell_languages);
        g_list_free (spell_languages);
    }

    if (E_IS_MSG_COMPOSER (window)) {
        /* Integrate the new composer into the mail module. */
        em_configure_new_composer (E_MSG_COMPOSER (window));
        return;
    }

    if (!E_IS_SHELL_WINDOW (window))
        return;

    module_name = G_TYPE_MODULE (shell_module)->name;

    e_shell_window_register_new_item_actions (
        E_SHELL_WINDOW (window), module_name,
        item_entries, G_N_ELEMENTS (item_entries));

    e_shell_window_register_new_source_actions (
        E_SHELL_WINDOW (window), module_name,
        source_entries, G_N_ELEMENTS (source_entries));

    g_signal_connect_swapped (
        shell, "event::mail-icon",
        G_CALLBACK (mail_shell_module_mail_icon_cb), window);

    g_object_weak_ref (
        G_OBJECT (window), (GWeakNotify)
        mail_shell_module_window_weak_notify_cb, shell);

    if (first_time) {
        g_signal_connect (
            window, "map-event",
            G_CALLBACK (e_msg_composer_check_autosave), NULL);
        first_time = FALSE;
    }
}

static EShellModuleInfo module_info = {

    MODULE_NAME,
    MODULE_ALIASES,
    MODULE_SCHEMES,
    MODULE_SORT_ORDER,

    /* is_busy */ NULL,
    /* shutdown */ NULL,
    e_mail_shell_module_migrate
};

void
e_shell_module_init (GTypeModule *type_module)
{
    EShell *shell;
    EShellModule *shell_module;
    EShellSettings *shell_settings;
    gboolean enable_search_folders;

    shell_module = E_SHELL_MODULE (type_module);
    shell = e_shell_module_get_shell (shell_module);
    shell_settings = e_shell_get_shell_settings (shell);

    e_shell_module_set_info (
        shell_module, &module_info,
        e_mail_shell_view_get_type (type_module));

    /* This also initializes Camel, so it needs to happen early. */
    mail_session_init (shell_module);

    mail_shell_module_init_hooks ();
    mail_shell_module_init_importers ();

    /* XXX This never gets unreffed. */
    mail_shell_module = g_object_ref (shell_module);

    store_hash = g_hash_table_new_full (
        g_direct_hash, g_direct_equal,
        (GDestroyNotify) NULL,
        (GDestroyNotify) store_hash_free);

    async_event = mail_async_event_new ();

    folder_tree_model = em_folder_tree_model_new (shell_module);

    g_signal_connect (
        shell, "notify::online",
        G_CALLBACK (mail_shell_module_notify_online_cb),
        shell_module);

    g_signal_connect (
        shell, "handle-uri",
        G_CALLBACK (mail_shell_module_handle_uri_cb),
        shell_module);

    g_signal_connect (
        shell, "prepare-for-offline",
        G_CALLBACK (mail_shell_module_prepare_for_offline_cb),
        shell_module);

    g_signal_connect (
        shell, "prepare-for-online",
        G_CALLBACK (mail_shell_module_prepare_for_online_cb),
        shell_module);

    g_signal_connect (
        shell, "send-receive",
        G_CALLBACK (mail_shell_module_send_receive_cb),
        shell_module);

    g_signal_connect (
        shell, "window-created",
        G_CALLBACK (mail_shell_module_window_created_cb),
        shell_module);

    mail_config_init ();
    mail_msg_init ();

    mail_shell_module_init_local_store (shell_module);
    mail_shell_module_load_accounts (shell_module);

    /* Initialize settings before initializing preferences,
     * since the preferences bind to the shell settings. */
    e_mail_shell_module_init_settings (shell);
    mail_shell_module_init_preferences (shell);

    enable_search_folders = e_shell_settings_get_boolean (
        shell_settings, "mail-enable-search-folders");
    if (enable_search_folders)
        vfolder_load_storage ();

    mail_autoreceive_init (session);

    if (g_getenv ("CAMEL_FLUSH_CHANGES") != NULL)
        mail_sync_timeout_source_id = g_timeout_add_seconds (
            mail_config_get_sync_timeout (),
            (GSourceFunc) mail_shell_module_mail_sync,
            shell_module);
}

/******************************** Public API *********************************/

CamelFolder *
e_mail_shell_module_get_folder (EShellModule *shell_module,
                                EMailFolderType folder_type)
{
    g_return_val_if_fail (E_IS_SHELL_MODULE (shell_module), NULL);

    return default_local_folders[folder_type].folder;
}

const gchar *
e_mail_shell_module_get_folder_uri (EShellModule *shell_module,
                                    EMailFolderType folder_type)
{
    g_return_val_if_fail (E_IS_SHELL_MODULE (shell_module), NULL);

    return default_local_folders[folder_type].uri;
}

EMFolderTreeModel *
e_mail_shell_module_get_folder_tree_model (EShellModule *shell_module)
{
    /* Require a shell module in case we need it in the future. */
    g_return_val_if_fail (E_IS_SHELL_MODULE (shell_module), NULL);

    return folder_tree_model;
}

void
e_mail_shell_module_add_store (EShellModule *shell_module,
                               CamelStore *store,
                               const gchar *name)
{
    g_return_if_fail (E_IS_SHELL_MODULE (shell_module));
    g_return_if_fail (CAMEL_IS_STORE (store));
    g_return_if_fail (name != NULL);

    mail_shell_module_add_store (shell_module, store, name, NULL);
}

CamelStore *
e_mail_shell_module_get_local_store (EShellModule *shell_module)
{
    g_return_val_if_fail (E_IS_SHELL_MODULE (shell_module), NULL);
    g_return_val_if_fail (local_store != NULL, NULL);

    return local_store;
}

CamelStore *
e_mail_shell_module_load_store_by_uri (EShellModule *shell_module,
                                       const gchar *uri,
                                       const gchar *name)
{
    CamelStore *store;
    CamelProvider *provider;
    CamelException ex;

    g_return_val_if_fail (E_IS_SHELL_MODULE (shell_module), NULL);
    g_return_val_if_fail (uri != NULL, NULL);
    g_return_val_if_fail (name != NULL, NULL);

    camel_exception_init (&ex);

    /* Load the service, but don't connect.  Check its provider,
     * and if this belongs in the shell's folder list, add it. */

    provider = camel_provider_get (uri, &ex);
    if (provider == NULL)
        goto fail;

    if (!(provider->flags & CAMEL_PROVIDER_IS_STORAGE))
        return NULL;

    store = (CamelStore *) camel_session_get_service (
        session, uri, CAMEL_PROVIDER_STORE, &ex);
    if (store == NULL)
        goto fail;

    e_mail_shell_module_add_store (shell_module, store, name);

    camel_object_unref (store);

    return store;

fail:
    /* FIXME: Show an error dialog. */
    g_warning (
        "Couldn't get service: %s: %s", uri,
        camel_exception_get_description (&ex));
    camel_exception_clear (&ex);

    return NULL;
}

/* Helper for e_mail_shell_module_remove_store() */
static void
mail_shell_module_remove_store_cb (CamelStore *store,
                                   gpointer event_data,
                                   gpointer user_data)
{
    camel_service_disconnect (CAMEL_SERVICE (store), TRUE, NULL);
    camel_object_unref (store);
}

void
e_mail_shell_module_remove_store (EShellModule *shell_module,
                                  CamelStore *store)
{
    g_return_if_fail (E_IS_SHELL_MODULE (shell_module));
    g_return_if_fail (CAMEL_IS_STORE (store));

    /* 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 (g_hash_table_lookup (store_hash, store) == NULL)
        return;

    camel_object_ref (store);
    g_hash_table_remove (store_hash, store);
    mail_note_store_remove (store);
    em_folder_tree_model_remove_store (folder_tree_model, store);

    mail_async_event_emit (
        async_event, MAIL_ASYNC_THREAD,
        (MailAsyncFunc) mail_shell_module_remove_store_cb,
        store, NULL, NULL);
}

void
e_mail_shell_module_remove_store_by_uri (EShellModule *shell_module,
                                         const gchar *uri)
{
    CamelStore *store;
    CamelProvider *provider;

    g_return_if_fail (E_IS_SHELL_MODULE (shell_module));
    g_return_if_fail (uri != NULL);

    provider = camel_provider_get (uri, NULL);
    if (provider == NULL)
        return;

    if (!(provider->flags & CAMEL_PROVIDER_IS_STORAGE))
        return;

    store = (CamelStore *) camel_session_get_service (
        session, uri, CAMEL_PROVIDER_STORE, NULL);
    if (store != NULL) {
        e_mail_shell_module_remove_store (shell_module, store);
        camel_object_unref (store);
    }
}

void
e_mail_shell_module_stores_foreach (EShellModule *shell_module,
                                    GHFunc func,
                                    gpointer user_data)
{
    GHashTableIter iter;
    gpointer key, value;

    g_return_if_fail (E_IS_SHELL_MODULE (shell_module));
    g_return_if_fail (func != NULL);

    g_hash_table_iter_init (&iter, store_hash);

    while (g_hash_table_iter_next (&iter, &key, &value))
        func (key, ((StoreInfo *) value)->name, user_data);
}