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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-setup.c
 *
 * Copyright (C) 2000, 2001 Ximian, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * 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.
 *
 */

/* This needs to be a lot better.  */

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

#include <errno.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <dirent.h>
#include <stdio.h> /* rename() */
#include <string.h> /* strlen() */

#include <gtk/gtklabel.h>
#include <libgnome/gnome-defs.h>
#include <libgnome/gnome-i18n.h>
#include <libgnome/gnome-util.h>
#include <libgnomeui/gnome-stock.h>
#include <gal/widgets/e-gui-utils.h>

#include "e-setup.h"


static GList *
check_dir_recur (const char *evolution_directory,
         const char *current_directory)
{
    DIR *def;
    GList *newfiles = NULL;
    struct dirent *current;

    def = opendir (current_directory);
    if (def == NULL)
        return NULL;

    current = readdir (def);
    while (current != NULL) {
        struct stat buf;
        char *fullname, *fulldefaultname;

        if (current->d_name[0] == '.' &&
            (current->d_name[1] == '\0' ||
             (current->d_name[1] == '.' && current->d_name[2] == '\0'))) {
            current = readdir (def);
            continue;
        }

        fullname = g_concat_dir_and_file (evolution_directory,
                          current->d_name);
        fulldefaultname = g_concat_dir_and_file (current_directory,
                             current->d_name);

        if (stat (fullname, &buf) == -1) {
            char *name;

            name = g_strdup (fulldefaultname);
            newfiles = g_list_append (newfiles, name);
        } else {
            if (S_ISDIR (buf.st_mode)) {
                newfiles = g_list_concat (newfiles,
                              check_dir_recur (fullname,
                                       fulldefaultname));
            }
        }

        g_free (fulldefaultname);
        g_free (fullname);
        current = readdir (def);
    }

    closedir (def);
    return newfiles;
}

static gboolean
check_evolution_directory (const char *evolution_directory)
{
    GtkWidget *dialog;
    GtkWidget *label1, *label2;
    gboolean retval;
    GList *newfiles, *l;
    char *defaultdir;
    int result;

    defaultdir = g_strdup (EVOLUTION_DATADIR "/evolution/default_user");
    newfiles = g_list_concat (NULL, check_dir_recur (evolution_directory,
                             defaultdir));

    if (newfiles == NULL) {
        retval = TRUE;
        goto out;
    }

    dialog = gnome_dialog_new (_("Evolution installation"),
                   GNOME_STOCK_BUTTON_OK, GNOME_STOCK_BUTTON_CANCEL,
                   NULL);

    label1 = gtk_label_new (_("This new version of Evolution needs to install additional files\ninto your personal Evolution directory"));
    label2 = gtk_label_new (_("Please click \"OK\" to install the files, or \"Cancel\" to exit."));

    gtk_box_pack_start (GTK_BOX (GNOME_DIALOG (dialog)->vbox), label1, TRUE, TRUE, 0);
    gtk_box_pack_start (GTK_BOX (GNOME_DIALOG (dialog)->vbox), label2, TRUE, TRUE, 0);

    gtk_widget_show (label1);
    gtk_widget_show (label2);

    gtk_window_set_policy (GTK_WINDOW (dialog), FALSE, TRUE, FALSE);

    result = gnome_dialog_run_and_close (GNOME_DIALOG (dialog));

    if (result != 0) {
        retval = FALSE;
        goto out;
    }

    retval = TRUE;
    for (l = newfiles; l; l = l->next) {
        char *command;
        char *shortpath;

        shortpath = l->data + strlen (EVOLUTION_DATADIR "/evolution/default_user/");
        command = g_strconcat ("cp -r ",
                       l->data, " ",
                       evolution_directory, "/",
                       shortpath,
                       NULL);

        if (system (command) != 0) {
            retval = FALSE;
        } else {
            retval = (retval && TRUE);
        }

        g_free (command);
    }

    if (retval == FALSE)
        e_notice (NULL, GNOME_MESSAGE_BOX_ERROR,
              _("Could not update files correctly"));
    else
        e_notice (NULL, GNOME_MESSAGE_BOX_INFO,
              _("Evolution files successfully installed."));

 out:

    for (l = newfiles; l; l = l->next)
        g_free (l->data);

    g_list_free (newfiles);
    g_free (defaultdir);

    return retval;
}


static gboolean
copy_default_stuff (const char *evolution_directory)
{
    GtkWidget *dialog;
    GtkWidget *label1;
    GtkWidget *label2;
    GtkWidget *label3;
    gboolean retval;
    char *command;
    int result;

    dialog = gnome_dialog_new (_("Evolution installation"),
                   GNOME_STOCK_BUTTON_OK, GNOME_STOCK_BUTTON_CANCEL,
                   NULL);

    label1 = gtk_label_new (_("This seems to be the first time you are running Evolution."));
    label2 = gtk_label_new (_("Please click \"OK\" to install the Evolution user files under"));
    label3 = gtk_label_new (evolution_directory);

    gtk_box_pack_start (GTK_BOX (GNOME_DIALOG (dialog)->vbox), label1, TRUE, TRUE, 0);
    gtk_box_pack_start (GTK_BOX (GNOME_DIALOG (dialog)->vbox), label2, TRUE, TRUE, 0);
    gtk_box_pack_start (GTK_BOX (GNOME_DIALOG (dialog)->vbox), label3, TRUE, TRUE, 0);

    gtk_widget_show (label1);
    gtk_widget_show (label2);
    gtk_widget_show (label3);

    gtk_window_set_policy (GTK_WINDOW (dialog), FALSE, TRUE, FALSE);

    result = gnome_dialog_run_and_close (GNOME_DIALOG (dialog));
    if (result != 0)
        return FALSE;

    if (mkdir (evolution_directory, 0700)) {
        e_notice (NULL, GNOME_MESSAGE_BOX_ERROR,
              _("Cannot create the directory\n%s\nError: %s"),
              evolution_directory,
              g_strerror (errno));
        return FALSE;
    }

    command = g_strconcat ("cp -r ",
                   EVOLUTION_DATADIR,
                   "/evolution/default_user/* ",
                   evolution_directory,
                   NULL);

    if (system (command) != 0) {
        /* FIXME: Give more help.  */
        e_notice (NULL, GNOME_MESSAGE_BOX_ERROR,
              _("Cannot copy files into\n`%s'."), evolution_directory);
        retval = FALSE;
    } else {
        e_notice (NULL, GNOME_MESSAGE_BOX_INFO,
              _("Evolution files successfully installed."));
        retval = TRUE;
    }

    g_free (command);

    return retval;
}


gboolean
e_setup (const char *evolution_directory)
{
    struct stat statinfo;
    char *file;

    if (stat (evolution_directory, &statinfo) != 0)
        return copy_default_stuff (evolution_directory);

    if (! S_ISDIR (statinfo.st_mode)) {
        e_notice (NULL, GNOME_MESSAGE_BOX_ERROR,
              _("The file `%s' is not a directory.\n"
                "Please move it in order to allow installation\n"
                "of the Evolution user files."));
        return FALSE;
    }

    /* Make sure this is really our directory, not an Evolution
     * build tree or something like that.
     */
    file = g_strdup_printf ("%s/shortcuts.xml", evolution_directory);
    if (stat (file, &statinfo) != 0) {
        e_notice (NULL, GNOME_MESSAGE_BOX_ERROR,
              _("The directory `%s' exists but is not the\n"
                "Evolution directory.  Please move it in order\n"
                "to allow installation of the Evolution user "
                "files."), evolution_directory);
        g_free (file);
        return FALSE;
    }
    g_free (file);

    /* If the user has an old-style config file, replace it with
     * the new-style config directory. FIXME: This should be
     * temporary.
     */
    file = g_strdup_printf ("%s/config", evolution_directory);
    if (stat (file, &statinfo) == 0 && ! S_ISDIR (statinfo.st_mode)) {
        char *old = g_strdup_printf ("%s.old", file);
        rename (file, old);
        mkdir (file, 0700);
        g_free (old);
    }
    g_free (file);

    /* User has evolution directory...
       Check if it is up to date. */
    return check_evolution_directory (evolution_directory);
}