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/*
 * em-account-prefs.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)
 *
 */

/* XXX EAccountManager handles all the user interface stuff.  This subclass
 *     applies policies using mailer resources that EAccountManager does not
 *     have access to.  The desire is to someday move account management
 *     completely out of the mailer, perhaps to evolution-data-server. */

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

#include "em-account-prefs.h"

#include <glib/gi18n.h>

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

#include "e-mail-backend.h"
#include "e-mail-local.h"
#include "e-mail-store.h"
#include "em-config.h"
#include "em-account-editor.h"
#include "em-utils.h"
#include "mail-vfolder.h"
#include "shell/e-shell.h"
#include "capplet/settings/mail-capplet-shell.h"

struct _EMAccountPrefsPrivate {
    EMailBackend *backend;
    gpointer assistant; /* weak pointer */
    gpointer editor;    /* weak pointer */
};

enum {
    PROP_0,
    PROP_BACKEND
};

G_DEFINE_TYPE (
    EMAccountPrefs,
    em_account_prefs,
    E_TYPE_ACCOUNT_MANAGER)

static gboolean
account_prefs_toggle_enable_special (EMAccountPrefs *prefs,
                                     EAccountTreeViewSelectedType type,
                                     gboolean enabled)
{
    const gchar *prop = NULL;
    EShell *shell;
    EShellSettings *shell_settings;

    g_return_val_if_fail (prefs != NULL, FALSE);
    g_return_val_if_fail (prefs->priv != NULL, FALSE);

    if (type == E_ACCOUNT_TREE_VIEW_SELECTED_LOCAL)
        prop = "mail-enable-local-folders";
    else if (type == E_ACCOUNT_TREE_VIEW_SELECTED_VFOLDER)
        prop = "mail-enable-search-folders";

    if (!prop)
        return FALSE;

    shell = e_shell_backend_get_shell (E_SHELL_BACKEND (prefs->priv->backend));
    shell_settings = e_shell_get_shell_settings (shell);

    e_shell_settings_set_boolean (shell_settings, prop, enabled);

    /* make sure "Search Folders" are loaded when enabled */
    if (enabled && type == E_ACCOUNT_TREE_VIEW_SELECTED_VFOLDER)
        vfolder_load_storage (prefs->priv->backend);

    return TRUE;
}

static void
account_prefs_enable_account_cb (EAccountTreeView *tree_view,
                                 EMAccountPrefs *prefs)
{
    EAccount *account;
    EMailSession *session;

    account = e_account_tree_view_get_selected (tree_view);
    if (!account) {
        if (account_prefs_toggle_enable_special (prefs, e_account_tree_view_get_selected_type (tree_view), TRUE))
            return;
    }

    g_return_if_fail (account != NULL);

    session = e_mail_backend_get_session (prefs->priv->backend);
    e_mail_store_add_by_account (session, account);
}

static void
account_prefs_disable_account_cb (EAccountTreeView *tree_view,
                                  EMAccountPrefs *prefs)
{
    EAccountList *account_list;
    EAccount *account;
    EMailSession *session;
    gpointer parent;
    gint response;

    account = e_account_tree_view_get_selected (tree_view);
    if (!account) {
        if (account_prefs_toggle_enable_special (prefs, e_account_tree_view_get_selected_type (tree_view), FALSE))
            return;
    }

    g_return_if_fail (account != NULL);

    session = e_mail_backend_get_session (prefs->priv->backend);

    account_list = e_account_tree_view_get_account_list (tree_view);
    g_return_if_fail (account_list != NULL);

    if (!e_account_list_account_has_proxies (account_list, account)) {
        e_mail_store_remove_by_account (session, account);
        return;
    }

    parent = gtk_widget_get_toplevel (GTK_WIDGET (tree_view));
    parent = gtk_widget_is_toplevel (parent) ? parent : NULL;

    response = e_alert_run_dialog_for_args (
        parent, "mail:ask-delete-proxy-accounts", NULL);

    if (response != GTK_RESPONSE_YES) {
        g_signal_stop_emission_by_name (tree_view, "disable-account");
        return;
    }

    e_account_list_remove_account_proxies (account_list, account);

    e_mail_store_remove_by_account (session, account);
}

static void
account_prefs_set_backend (EMAccountPrefs *prefs,
                           EMailBackend *backend)
{
    g_return_if_fail (E_IS_MAIL_BACKEND (backend));
    g_return_if_fail (prefs->priv->backend == NULL);

    prefs->priv->backend = g_object_ref (backend);
}

static void
account_prefs_set_property (GObject *object,
                            guint property_id,
                            const GValue *value,
                            GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_BACKEND:
            account_prefs_set_backend (
                EM_ACCOUNT_PREFS (object),
                g_value_get_object (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
account_prefs_get_property (GObject *object,
                            guint property_id,
                            GValue *value,
                            GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_BACKEND:
            g_value_set_object (
                value,
                em_account_prefs_get_backend (
                EM_ACCOUNT_PREFS (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
account_prefs_dispose (GObject *object)
{
    EMAccountPrefsPrivate *priv;

    priv = EM_ACCOUNT_PREFS (object)->priv;

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

    if (priv->assistant != NULL) {
        g_object_remove_weak_pointer (
            G_OBJECT (priv->assistant), &priv->assistant);
        priv->assistant = NULL;
    }

    if (priv->editor != NULL) {
        g_object_remove_weak_pointer (
            G_OBJECT (priv->editor), &priv->editor);
        priv->editor = NULL;
    }

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

static void
account_prefs_add_account (EAccountManager *manager)
{
    EMAccountPrefsPrivate *priv;
    EMAccountEditor *emae;
    gpointer parent;

    priv = EM_ACCOUNT_PREFS (manager)->priv;

    if (priv->assistant != NULL) {
        gtk_window_present (GTK_WINDOW (priv->assistant));
        return;
    }

    parent = gtk_widget_get_toplevel (GTK_WIDGET (manager));
    parent = gtk_widget_is_toplevel (parent) ? parent : NULL;

    if (!e_shell_get_express_mode (e_shell_get_default ())) {
        /** @HookPoint-EMConfig: New Mail Account Assistant
         * @Id: org.gnome.evolution.mail.config.accountAssistant
         * @Type: E_CONFIG_ASSISTANT
         * @Class: org.gnome.evolution.mail.config:1.0
         * @Target: EMConfigTargetAccount
         *
         * The new mail account assistant.
         */
        emae = em_account_editor_new (
            NULL, EMAE_ASSISTANT, priv->backend,
            "org.gnome.evolution.mail.config.accountAssistant");
        e_config_create_window (
            E_CONFIG (emae->config), NULL,
            _("Evolution Account Assistant"));
        priv->assistant = E_CONFIG (emae->config)->window;
        g_object_set_data_full (
            G_OBJECT (priv->assistant), "AccountEditor",
            emae, (GDestroyNotify) g_object_unref);
    } else {
        priv->assistant = mail_capplet_shell_new (0, TRUE, FALSE);
    }

    g_object_add_weak_pointer (G_OBJECT (priv->assistant), &priv->assistant);
    gtk_window_set_transient_for (GTK_WINDOW (priv->assistant), parent);
    gtk_widget_show (priv->assistant);
}

static void
account_prefs_edit_account (EAccountManager *manager)
{
    EMAccountPrefsPrivate *priv;
    EMAccountEditor *emae;
    EAccountTreeView *tree_view;
    EAccount *account;
    gpointer parent;

    priv = EM_ACCOUNT_PREFS (manager)->priv;

    if (priv->editor != NULL) {
        gtk_window_present (GTK_WINDOW (priv->editor));
        return;
    }

    tree_view = e_account_manager_get_tree_view (manager);
    account = e_account_tree_view_get_selected (tree_view);
    g_return_if_fail (account != NULL);

    parent = gtk_widget_get_toplevel (GTK_WIDGET (manager));
    parent = gtk_widget_is_toplevel (parent) ? parent : NULL;

    /** @HookPoint-EMConfig: Mail Account Editor
     * @Id: org.gnome.evolution.mail.config.accountEditor
     * @Type: E_CONFIG_BOOK
     * @Class: org.gnome.evolution.mail.config:1.0
     * @Target: EMConfigTargetAccount
     *
     * The account editor window.
     */
    emae = em_account_editor_new (
        account, EMAE_NOTEBOOK, priv->backend,
        "org.gnome.evolution.mail.config.accountEditor");
    e_config_create_window (
        E_CONFIG (emae->config), parent, _("Account Editor"));
    priv->editor = E_CONFIG (emae->config)->window;
    g_object_set_data_full (
        G_OBJECT (priv->editor), "AccountEditor",
        emae, (GDestroyNotify) g_object_unref);

    g_object_add_weak_pointer (G_OBJECT (priv->editor), &priv->editor);
    gtk_widget_show (priv->editor);
}

static void
account_prefs_delete_account (EAccountManager *manager)
{
    EMAccountPrefsPrivate *priv;
    EAccountTreeView *tree_view;
    EAccountList *account_list;
    EAccount *account;
    EMailSession *session;
    gboolean has_proxies;
    gpointer parent;
    gint response;

    priv = EM_ACCOUNT_PREFS (manager)->priv;
    session = e_mail_backend_get_session (priv->backend);

    account_list = e_account_manager_get_account_list (manager);
    tree_view = e_account_manager_get_tree_view (manager);
    account = e_account_tree_view_get_selected (tree_view);
    g_return_if_fail (account != NULL);

    /* Make sure we aren't editing anything... */
    if (priv->editor != NULL)
        return;

    parent = gtk_widget_get_toplevel (GTK_WIDGET (manager));
    parent = gtk_widget_is_toplevel (parent) ? parent : NULL;

    has_proxies =
        e_account_list_account_has_proxies (account_list, account);

    response = e_alert_run_dialog_for_args (
        parent, has_proxies ?
        "mail:ask-delete-account-with-proxies" :
        "mail:ask-delete-account", NULL);

    if (response != GTK_RESPONSE_YES) {
        g_signal_stop_emission_by_name (manager, "delete-account");
        return;
    }

    /* Remove the account from the folder tree. */
    if (account->enabled)
        e_mail_store_remove_by_account (session, account);

    /* Remove all the proxies the account has created. */
    if (has_proxies)
        e_account_list_remove_account_proxies (account_list, account);

    /* Remove it from the config file. */
    e_account_list_remove (account_list, account);

    e_account_list_save (account_list);
}

static void
em_account_prefs_class_init (EMAccountPrefsClass *class)
{
    GObjectClass *object_class;
    EAccountManagerClass *account_manager_class;

    g_type_class_add_private (class, sizeof (EMAccountPrefsPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = account_prefs_set_property;
    object_class->get_property = account_prefs_get_property;
    object_class->dispose = account_prefs_dispose;

    account_manager_class = E_ACCOUNT_MANAGER_CLASS (class);
    account_manager_class->add_account = account_prefs_add_account;
    account_manager_class->edit_account = account_prefs_edit_account;
    account_manager_class->delete_account = account_prefs_delete_account;

    g_object_class_install_property (
        object_class,
        PROP_BACKEND,
        g_param_spec_object (
            "backend",
            NULL,
            NULL,
            E_TYPE_MAIL_BACKEND,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT_ONLY));
}

static void
em_account_prefs_init (EMAccountPrefs *prefs)
{
    EAccountManager *manager;
    EAccountTreeView *tree_view;

    prefs->priv = G_TYPE_INSTANCE_GET_PRIVATE (
        prefs, EM_TYPE_ACCOUNT_PREFS, EMAccountPrefsPrivate);

    manager = E_ACCOUNT_MANAGER (prefs);
    tree_view = e_account_manager_get_tree_view (manager);

    g_signal_connect (
        tree_view, "enable-account",
        G_CALLBACK (account_prefs_enable_account_cb), prefs);

    g_signal_connect (
        tree_view, "disable-account",
        G_CALLBACK (account_prefs_disable_account_cb), prefs);
}

static void
account_tree_view_sort_order_changed_cb (EAccountTreeView *tree_view,
                                         EMailBackend *backend)
{
    GSList *account_uids;

    g_return_if_fail (tree_view != NULL);
    g_return_if_fail (backend != NULL);

    account_uids = e_account_tree_view_get_sort_order (tree_view);
    if (!account_uids)
        return;

    em_utils_save_accounts_sort_order (backend, account_uids);

    g_slist_foreach (account_uids, (GFunc) g_free, NULL);
    g_slist_free (account_uids);
}

GtkWidget *
em_account_prefs_new (EPreferencesWindow *window)
{
    EShell *shell;
    EShellBackend *shell_backend;
    EAccountList *account_list;
    EAccountTreeView *tree_view;
    EMailSession *session;
    const gchar *data_dir;
    GtkWidget *res;
    GSList *account_uids;

    account_list = e_get_account_list ();
    g_return_val_if_fail (E_IS_ACCOUNT_LIST (account_list), NULL);

    /* XXX Figure out a better way to get the mail backend. */
    shell = e_preferences_window_get_shell (window);
    shell_backend = e_shell_get_backend_by_name (shell, "mail");

    session = e_mail_backend_get_session (E_MAIL_BACKEND (shell_backend));
    data_dir = e_shell_backend_get_data_dir (shell_backend);

    /* Make sure the e-mail-local is initialized. */
    e_mail_local_init (session, data_dir);

    res = g_object_new (
        EM_TYPE_ACCOUNT_PREFS,
        "account-list", account_list,
        "backend", shell_backend, NULL);

    tree_view = e_account_manager_get_tree_view (E_ACCOUNT_MANAGER (res));
    e_account_tree_view_set_express_mode (tree_view, e_shell_get_express_mode (shell));

    g_object_bind_property (
        e_shell_get_shell_settings (shell), "mail-sort-accounts-alpha",
        tree_view, "sort-alpha",
        G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);

    g_object_bind_property (
        e_shell_get_shell_settings (shell), "mail-enable-local-folders",
        tree_view, "enable-local-folders",
        G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);

    g_object_bind_property (
        e_shell_get_shell_settings (shell), "mail-enable-search-folders",
        tree_view, "enable-search-folders",
        G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);

    account_uids = em_utils_load_accounts_sort_order (E_MAIL_BACKEND (shell_backend));
    if (account_uids) {
        e_account_tree_view_set_sort_order (tree_view, account_uids);
        g_slist_foreach (account_uids, (GFunc) g_free, NULL);
        g_slist_free (account_uids);
    }

    g_signal_connect (tree_view, "sort-order-changed",
        G_CALLBACK (account_tree_view_sort_order_changed_cb), shell_backend);

    return res;
}

EMailBackend *
em_account_prefs_get_backend (EMAccountPrefs *prefs)
{
    g_return_val_if_fail (EM_IS_ACCOUNT_PREFS (prefs), NULL);

    return prefs->priv->backend;
}