path: root/plugins/backup-restore/backup.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)
 *
 */
 
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/wait.h>

#include <glib/gi18n.h>
#include <gtk/gtk.h>
#include <libgnome/gnome-util.h>

#include <libebook/e-book.h>
#include <libecal/e-cal.h>
#include <libedataserver/e-account.h>
#include <libedataserver/e-account-list.h>
#include "e-util/e-util.h"

#define EVOLUTION "evolution"
#define EVOLUTION_DIR "$HOME/.evolution/"
#define EVOLUTION_DIR_BACKUP "$HOME/.evolution-old/"
#define GCONF_DUMP_FILE "backup-restore-gconf.xml"
#define GCONF_DUMP_PATH EVOLUTION_DIR GCONF_DUMP_FILE
#define GCONF_DIR "/apps/evolution"
#define ARCHIVE_NAME "evolution-backup.tar.gz"

static gboolean backup_op = FALSE;
static char *bk_file = NULL;
static gboolean restore_op = FALSE;
static char *res_file = NULL;
static gboolean check_op = FALSE;
static char *chk_file = NULL;
static gboolean restart_arg = FALSE;
static gboolean gui_arg = FALSE;
static gchar **opt_remaining = NULL;
static int result=0;
static GtkWidget *progress_dialog;
static GtkWidget *pbar;
static char *txt = NULL;
gboolean complete = FALSE;

static const GOptionEntry options[] = {
    { "backup", '\0', 0, G_OPTION_ARG_NONE, &backup_op,
      N_("Backup Evolution directory"), NULL },
    { "restore", '\0', 0, G_OPTION_ARG_NONE, &restore_op,
      N_("Restore Evolution directory"), NULL },
    { "check", '\0', 0, G_OPTION_ARG_NONE, &check_op,
      N_("Check Evolution Backup"), NULL },
    { "restart", '\0', 0, G_OPTION_ARG_NONE, &restart_arg,
      N_("Restart Evolution"), NULL },
    { "gui", '\0', 0, G_OPTION_ARG_NONE, &gui_arg,
      N_("With Graphical User Interface"), NULL },
    { G_OPTION_REMAINING, '\0', 0,
      G_OPTION_ARG_STRING_ARRAY, &opt_remaining },
    { NULL }
};

#define d(x) x

#define rc(x) G_STMT_START { g_message (x); system (x); } G_STMT_END

#define CANCEL(x) if (x) return;

static void
s (const char *cmd)
{
    if (!cmd)
        return;

    if (strstr (cmd, "$HOME") != NULL) {
        /* read the doc for g_get_home_dir to know why replacing it here */
        const char *home = g_get_home_dir ();
        const char *p, *next;
        GString *str = g_string_new ("");

        p = cmd;
        while (next = strstr (p, "$HOME"), next) {
            if (p + 1 < next)
                g_string_append_len (str, p, next - p);
            g_string_append (str, home);

            p = next + 5;
        }

        g_string_append (str, p);

        rc (str->str);
        g_string_free (str, TRUE);
    } else
        rc (cmd);
}

static void
backup (const char *filename)
{
    char *command;
    char *quotedfname;

    g_return_if_fail (filename && *filename);
    quotedfname = g_shell_quote(filename);
    
    CANCEL (complete);
    txt = _("Shutting down Evolution");
    /* FIXME Will the versioned setting always work? */
    s (EVOLUTION " --force-shutdown");

    s ("rm $HOME/.evolution/.running");

    CANCEL (complete);
    txt = _("Backing Evolution accounts and settings");
    s ("gconftool-2 --dump " GCONF_DIR " > " GCONF_DUMP_PATH);

    CANCEL (complete);
    txt = _("Backing Evolution data (Mails, Contacts, Calendar, Tasks, Memos)");

    /* FIXME stay on this file system ,other options?" */
    /* FIXME compression type?" */
    /* FIXME date/time stamp?" */
    /* FIXME backup location?" */
    command = g_strdup_printf ("cd $HOME && tar chf - .evolution .camel_certs | gzip > %s", quotedfname);
    s (command);
    g_free (command);
    g_free (quotedfname);

    txt = _("Backup complete");

    if (restart_arg) {

        CANCEL (complete);
        txt = _("Restarting Evolution");
        complete=TRUE;

        s (EVOLUTION);
    }

}

static void
ensure_locals (ESourceList *source_list, const char *base_dir)
{
    GSList *groups, *sources;

    if (!source_list)
        return;

    for (groups = e_source_list_peek_groups (source_list); groups; groups = groups->next) {
        char *base_filename, *base_uri;
        ESourceGroup *group = E_SOURCE_GROUP (groups->data);

        if (!group || !e_source_group_peek_base_uri (group) || !g_str_has_prefix (e_source_group_peek_base_uri (group), "file://"))
            continue;

        base_filename = g_build_filename (base_dir, "local", NULL);
        base_uri = g_filename_to_uri (base_filename, NULL, NULL);

        if (base_uri && !g_str_equal (base_uri, e_source_group_peek_base_uri (group))) {
            /* groups base_uri differs from the new one, maybe users imports
               to the account with different user name, thus fixing this */
            e_source_group_set_base_uri (group, base_uri);
        }

        for (sources = e_source_group_peek_sources (group); sources; sources = sources->next) {
            ESource *source = E_SOURCE (sources->data);

            if (!source || !e_source_peek_absolute_uri (source))
                continue;

            if (!g_str_has_prefix (e_source_peek_absolute_uri (source), base_uri)) {
                char *abs_uri = e_source_build_absolute_uri (source);

                e_source_set_absolute_uri (source, abs_uri);
                g_free (abs_uri);
            }
        }

        g_free (base_filename);
        g_free (base_uri);
    }
}

/* returns whether changed the item */
static gboolean
fix_account_folder_uri (EAccount *account, e_account_item_t item, const char *base_dir)
{
    gboolean changed = FALSE;
    const char *uri;

    /* the base_dir should always contain that part, so just a sanity check */
    if (!account || !base_dir || strstr (base_dir, "/.evolution/mail/local") == NULL)
        return FALSE;

    uri = e_account_get_string (account, item);
    if (uri && strstr (uri, "/.evolution/mail/local") != NULL) {
        const char *path = strchr (uri, ':') + 1;

        if (!g_str_has_prefix (path, base_dir)) {
            GString *new_uri = g_string_new ("");

            /* prefix, like "mbox:" */
            g_string_append_len (new_uri, uri, path - uri);
            /* middle, changing old patch with new path  */
            g_string_append_len (new_uri, base_dir, strstr (base_dir, "/.evolution/mail/local") - base_dir);
            /* sufix, the rest beginning with "/.evolution/..." */
            g_string_append (new_uri, strstr (uri, "/.evolution/mail/local"));

            changed = TRUE;
            e_account_set_string (account, item, new_uri->str);
            g_string_free (new_uri, TRUE);
        }
    }

    return changed;
}

static void
restore (const char *filename)
{
    struct _calendars { ECalSourceType type; const char *dir; } 
        calendars[] = {
            { E_CAL_SOURCE_TYPE_EVENT,   "calendar"},
            { E_CAL_SOURCE_TYPE_TODO,    "tasks"},
            { E_CAL_SOURCE_TYPE_JOURNAL, "memos"},
            { E_CAL_SOURCE_TYPE_LAST,    NULL} };
    int i;
    char *command;
    char *quotedfname;
    ESourceList *sources = NULL;
    EAccountList *accounts;
    GConfClient *gconf;
    
    g_return_if_fail (filename && *filename);
    quotedfname = g_shell_quote(filename);
    
    /* FIXME Will the versioned setting always work? */
    CANCEL (complete);
    txt = _("Shutting down Evolution");
    s (EVOLUTION " --force-shutdown");

    CANCEL (complete);
    txt = _("Backup current Evolution data");
    s ("mv " EVOLUTION_DIR " " EVOLUTION_DIR_BACKUP);
    s ("mv $HOME/.camel_certs ~/.camel_certs_old");

    CANCEL (complete);
    txt = _("Extracting files from backup");
    command = g_strdup_printf ("cd $HOME && gzip -cd %s| tar xf -", quotedfname);
    s (command);
    g_free (command);
    g_free (quotedfname);

    CANCEL (complete);
    txt = _("Loading Evolution settings");
    s ("gconftool-2 --load " GCONF_DUMP_PATH);

    CANCEL (complete);
    txt = _("Removing temporary backup files");
    s ("rm -rf " GCONF_DUMP_PATH);
    s ("rm -rf " EVOLUTION_DIR_BACKUP);
    s ("rm -rf $HOME/.camel_certs_old");
    s ("rm $HOME/.evolution/.running");

    CANCEL (complete);
    txt = _("Ensuring local sources");

    if (e_book_get_addressbooks (&sources, NULL)) {
        char *base_dir = g_build_filename (e_get_user_data_dir (), "addressbook", NULL);

        ensure_locals (sources, base_dir);
        g_object_unref (sources);
        sources = NULL;

        g_free (base_dir);
    }

    for (i = 0; calendars[i].dir; i++) {
        if (e_cal_get_sources (&sources, calendars [i].type, NULL)) {
            char *base_dir = g_build_filename (e_get_user_data_dir (), calendars [i].dir, NULL);

            ensure_locals (sources, base_dir);
            g_object_unref (sources);
            sources = NULL;

            g_free (base_dir);
        }
    }

    gconf = gconf_client_get_default ();
    accounts = e_account_list_new (gconf);

    if (accounts) {
        gboolean changed = FALSE;
        char *base_dir = g_build_filename (e_get_user_data_dir (), "mail", "local", NULL);
        EIterator *it;

        for (it = e_list_get_iterator (E_LIST (accounts)); e_iterator_is_valid (it); e_iterator_next (it)) {
            /* why does this return a 'const' object?!? */
            EAccount *account = (EAccount *) e_iterator_get (it);

            if (account) {
                changed = fix_account_folder_uri (account, E_ACCOUNT_DRAFTS_FOLDER_URI, base_dir) || changed;
                changed = fix_account_folder_uri (account, E_ACCOUNT_SENT_FOLDER_URI, base_dir) || changed;
            }
        }

        if (changed)
            e_account_list_save (accounts);

        g_object_unref (it);
        g_object_unref (accounts);
        g_free (base_dir);
    }

    g_object_unref (gconf);

    if (restart_arg) {
        CANCEL (complete);
        txt = _("Restarting Evolution");
        complete=TRUE;
        s (EVOLUTION);
    }

}

static void
check (const char *filename)
{
    char *command;
    char *quotedfname;

    g_return_if_fail (filename && *filename);
    quotedfname = g_shell_quote(filename);
    
    command = g_strdup_printf ("tar ztf %s | grep -e \"^\\.evolution/$\"", quotedfname);
    result = system (command);
    g_free (command);

    g_message ("First result %d", result);
    if (result)
        exit (result);

    command = g_strdup_printf ("tar ztf %s | grep -e \"^\\.evolution/%s$\"", quotedfname, GCONF_DUMP_FILE);
    result = system (command);
    g_free (command);
    g_free (quotedfname);
    
    g_message ("Second result %d", result);

}

static gboolean
pbar_update()
{
    if (!complete) {
         gtk_progress_bar_pulse ((GtkProgressBar *)pbar);
         gtk_progress_bar_set_text ((GtkProgressBar *)pbar, txt);
        return TRUE;
    }

    gtk_main_quit ();
    return FALSE;
}

static gpointer
thread_start (gpointer data)
{
    if (backup_op)
        backup (bk_file);
    else if (restore_op)
        restore (res_file);
    else if (check_op)
        check (chk_file);

    complete = TRUE;

    return GINT_TO_POINTER(result);
}

static gboolean
idle_cb(gpointer data)
{
    GThread *t;

    if (gui_arg) {
        /* Show progress dialog */
         gtk_progress_bar_pulse ((GtkProgressBar *)pbar);
        g_timeout_add (50, pbar_update, NULL);
    }

    t = g_thread_create (thread_start, NULL, FALSE, NULL);

    return FALSE;
}

static void
dlg_response (GtkWidget *dlg, gint response, gpointer data)
{
    /* We will cancel only backup/restore operations and not the check operation */
    complete = TRUE;

    /* If the response is not of delete_event then destroy the event */
    if (response != GTK_RESPONSE_NONE)
        gtk_widget_destroy (dlg);

    /* We will kill just the tar operation. Rest of the them will be just a second of microseconds.*/
    s ("pkill tar");

    gtk_main_quit ();
}

int
main (int argc, char **argv)
{
    GnomeProgram *program;
    GOptionContext *context;
    char *file = NULL, *oper = NULL;
    gint i;

    gtk_init (&argc, &argv);
    bindtextdomain (GETTEXT_PACKAGE, EVOLUTION_LOCALEDIR);
    bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
    textdomain (GETTEXT_PACKAGE);

    context = g_option_context_new (NULL);
    g_option_context_add_main_entries (context, options, GETTEXT_PACKAGE);
    program = gnome_program_init (PACKAGE, VERSION, LIBGNOME_MODULE, argc, argv,
                      GNOME_PROGRAM_STANDARD_PROPERTIES,
                      GNOME_PARAM_GOPTION_CONTEXT, context,
                      GNOME_PARAM_NONE);

    if (opt_remaining) {
        for (i = 0; i < g_strv_length (opt_remaining); i++) {
            if (backup_op) {
                oper = _("Backing up to the folder %s");
                d(g_message ("Backing up to the folder %s", (char *) opt_remaining[i]));
                bk_file = g_strdup ((char *) opt_remaining[i]);
                file = bk_file;
            } else if (restore_op) {
                oper = _("Restoring from the folder %s");
                d(g_message ("Restoring from the folder %s", (char *) opt_remaining[i]));
                res_file = g_strdup ((char *) opt_remaining[i]);
                file = res_file;
            } else if (check_op) {
                d(g_message ("Checking %s", (char *) opt_remaining[i]));
                chk_file = g_strdup ((char *) opt_remaining[i]);
            }
        }
    }

    if (gui_arg && !check_op) {
        GtkWidget *widget, *container;
        char *str = NULL, *txt;
        const char *txt2;

        gtk_window_set_default_icon_name ("evolution");

        /* Backup / Restore only can have GUI. We should restrict the rest */
        progress_dialog = gtk_dialog_new_with_buttons (backup_op ? _("Evolution Backup"): _("Evolution Restore"),
                                                      NULL,
                                                      GTK_DIALOG_MODAL,
                                                      GTK_STOCK_CANCEL,
                                                      GTK_RESPONSE_REJECT,
                                                      NULL);

        gtk_dialog_set_has_separator (GTK_DIALOG (progress_dialog), FALSE);
        gtk_container_set_border_width (GTK_CONTAINER (progress_dialog), 12);

        /* Override GtkDialog defaults */
        widget = GTK_DIALOG (progress_dialog)->vbox;
        gtk_box_set_spacing (GTK_BOX (widget), 12);
        gtk_container_set_border_width (GTK_CONTAINER (widget), 0);
        widget = GTK_DIALOG (progress_dialog)->action_area;
        gtk_box_set_spacing (GTK_BOX (widget), 12);
        gtk_container_set_border_width (GTK_CONTAINER (widget), 0);

        if (oper && file)
            str = g_strdup_printf(oper, file);

        container = gtk_table_new (2, 3, FALSE);
        gtk_table_set_col_spacings (GTK_TABLE (container), 12);
        gtk_table_set_row_spacings (GTK_TABLE (container), 12);
        gtk_widget_show (container);

        gtk_box_pack_start (GTK_BOX (GTK_DIALOG (progress_dialog)->vbox), container, FALSE, TRUE, 0);

        widget = gtk_image_new_from_stock (GTK_STOCK_COPY, GTK_ICON_SIZE_DIALOG);
        gtk_misc_set_alignment (GTK_MISC (widget), 0.0, 0.0);
        gtk_widget_show (widget);

        gtk_table_attach (GTK_TABLE (container), widget, 0, 1, 0, 3, GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);

        if (backup_op) {
            txt = _("Backing up Evolution Data");
            txt2 = _("Please wait while Evolution is backing up your data.");
        } else if (restore_op) {
            txt = _("Restoring Evolution Data");
            txt2 = _("Please wait while Evolution is restoring your data.");
        } else {
            /* do not translate these two, it's just a fallback when something goes wrong,
               we should never get here anyway. */
            txt = "Oops, doing nothing...";
            txt2 = "Should not be here now, really...";
        }

        txt = g_strconcat ("<b><big>", txt, "</big></b>", NULL);
        widget = gtk_label_new (NULL);
        gtk_label_set_line_wrap (GTK_LABEL (widget), FALSE);
        gtk_label_set_markup (GTK_LABEL (widget), txt);
        gtk_misc_set_alignment (GTK_MISC (widget), 0.0, 0.0);
        gtk_widget_show (widget);
        g_free (txt);

        gtk_table_attach (GTK_TABLE (container), widget, 1, 2, 0, 1, GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);

        txt = g_strconcat (txt2, " ", _("This may take a while depending on the amount of data in your account."), NULL);
        widget = gtk_label_new (NULL);
        gtk_label_set_line_wrap (GTK_LABEL (widget), TRUE);
        gtk_label_set_markup (GTK_LABEL (widget), txt);
        gtk_misc_set_alignment (GTK_MISC (widget), 0.0, 0.5);
        gtk_widget_show (widget);
        g_free (txt);

        gtk_table_attach (GTK_TABLE (container), widget, 1, 2, 1, 2, GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);

        pbar = gtk_progress_bar_new ();

        if (str) {
            txt = g_strconcat ("<i>", str, "</i>", NULL);
            widget = gtk_label_new (NULL);
            gtk_label_set_markup (GTK_LABEL (widget), txt);
            gtk_misc_set_alignment (GTK_MISC (widget), 0.0, 0.5);
            g_free (txt);
            g_free (str);
            gtk_table_attach (GTK_TABLE (container), widget, 1, 2, 2, 3, GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);
            gtk_table_set_row_spacing (GTK_TABLE (container), 2, 6);

            gtk_table_attach (GTK_TABLE (container), pbar, 1, 2, 3, 4, GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);
        } else
            gtk_table_attach (GTK_TABLE (container), pbar, 1, 2, 2, 3, GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);

        gtk_window_set_default_size ((GtkWindow *) progress_dialog, 450, 120);
        g_signal_connect (progress_dialog, "response", G_CALLBACK(dlg_response), NULL);
        gtk_widget_show_all (progress_dialog);
    } else if (check_op) {
         /* For sanity we don't need gui */
         check (chk_file);
         exit (result);
    }

    g_idle_add (idle_cb, NULL);
    gtk_main ();

    return result;
}