path: root/calendar/gui/migration.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* calendar-component.c
 *
 * Copyright (C) 2003  Ximian, Inc
 *
 * 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.
 *
 * Author: Rodrigo Moya <rodrigo@ximian.com>
 */

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

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

#include <bonobo/bonobo-i18n.h>
#include <libgnomevfs/gnome-vfs-uri.h>
#include <libgnomevfs/gnome-vfs-xfer.h>
#include <gtk/gtkwidget.h>
#include <gtk/gtkvbox.h>
#include <gtk/gtkmain.h>
#include <gtk/gtklabel.h>
#include <gtk/gtkprogressbar.h>
#include <libecal/e-cal.h>
#include <e-util/e-bconf-map.h>
#include <e-util/e-folder-map.h>
#include <libedataserver/e-dbhash.h>
#include <libedataserver/e-xml-hash-utils.h>
#include "calendar-config.h"
#include "calendar-config-keys.h"
#include "e-cal-event.h"
#include "migration.h"

static e_gconf_map_t calendar_display_map[] = {
    /* /Calendar/Display */
    { "Timezone", "calendar/display/timezone", E_GCONF_MAP_STRING },
    { "Use24HourFormat", "calendar/display/use_24hour_format", E_GCONF_MAP_BOOL },
    { "WeekStartDay", "calendar/display/week_start_day", E_GCONF_MAP_INT },
    { "DayStartHour", "calendar/display/day_start_hour", E_GCONF_MAP_INT },
    { "DayStartMinute", "calendar/display/day_start_minute", E_GCONF_MAP_INT },
    { "DayEndHour", "calendar/display/day_end_hour", E_GCONF_MAP_INT },
    { "DayEndMinute", "calendar/display/day_end_minute", E_GCONF_MAP_INT },
    { "TimeDivisions", "calendar/display/time_divisions", E_GCONF_MAP_INT },
    { "View", "calendar/display/default_view", E_GCONF_MAP_INT },
    { "HPanePosition", "calendar/display/hpane_position", E_GCONF_MAP_FLOAT },
    { "VPanePosition", "calendar/display/vpane_position", E_GCONF_MAP_FLOAT },
    { "MonthHPanePosition", "calendar/display/month_hpane_position", E_GCONF_MAP_FLOAT },
    { "MonthVPanePosition", "calendar/display/month_vpane_position", E_GCONF_MAP_FLOAT },
    { "CompressWeekend", "calendar/display/compress_weekend", E_GCONF_MAP_BOOL },
    { "ShowEventEndTime", "calendar/display/show_event_end", E_GCONF_MAP_BOOL },
    { "WorkingDays", "calendar/display/working_days", E_GCONF_MAP_INT },
    { 0 },
};

static e_gconf_map_t calendar_tasks_map[] = {
    /* /Calendar/Tasks */
    { "HideCompletedTasks", "calendar/tasks/hide_completed", E_GCONF_MAP_BOOL },
    { "HideCompletedTasksUnits", "calendar/tasks/hide_completed_units", E_GCONF_MAP_STRING },
    { "HideCompletedTasksValue", "calendar/tasks/hide_completed_value", E_GCONF_MAP_INT },
    { 0 },
};

static e_gconf_map_t calendar_tasks_colours_map[] = {
    /* /Calendar/Tasks/Colors */
    { "TasksDueToday", "calendar/tasks/colors/due_today", E_GCONF_MAP_STRING },
    { "TasksOverDue", "calendar/tasks/colors/overdue", E_GCONF_MAP_STRING },
    { "TasksDueToday", "calendar/tasks/colors/due_today", E_GCONF_MAP_STRING },
    { 0 },
};

static e_gconf_map_t calendar_other_map[] = {
    /* /Calendar/Other */
    { "ConfirmDelete", "calendar/prompts/confirm_delete", E_GCONF_MAP_BOOL },
    { "ConfirmExpunge", "calendar/prompts/confirm_expunge", E_GCONF_MAP_BOOL },
    { "UseDefaultReminder", "calendar/other/use_default_reminder", E_GCONF_MAP_BOOL },
    { "DefaultReminderInterval", "calendar/other/default_reminder_interval", E_GCONF_MAP_INT },
    { "DefaultReminderUnits", "calendar/other/default_reminder_units", E_GCONF_MAP_STRING },
    { 0 },
};

static e_gconf_map_t calendar_datenavigator_map[] = {
    /* /Calendar/DateNavigator */
    { "ShowWeekNumbers", "calendar/date_navigator/show_week_numbers", E_GCONF_MAP_BOOL },
    { 0 },
};

static e_gconf_map_t calendar_alarmnotify_map[] = {
    /* /Calendar/AlarmNotify */
    { "LastNotificationTime", "calendar/notify/last_notification_time", E_GCONF_MAP_INT },
    { "CalendarToLoad%i", "calendar/notify/calendars", E_GCONF_MAP_STRING|E_GCONF_MAP_LIST },
    { "BlessedProgram%i", "calendar/notify/programs", E_GCONF_MAP_STRING|E_GCONF_MAP_LIST },
    { 0 },
};

e_gconf_map_list_t calendar_remap_list[] = {

    { "/Calendar/Display", calendar_display_map },
    { "/Calendar/Other/Map", calendar_other_map },
    { "/Calendar/DateNavigator", calendar_datenavigator_map },
    { "/Calendar/AlarmNotify", calendar_alarmnotify_map },

    { 0 },
};

e_gconf_map_list_t task_remap_list[] = {

    { "/Calendar/Tasks", calendar_tasks_map },
    { "/Calendar/Tasks/Colors", calendar_tasks_colours_map },

    { 0 },
};

static GtkWidget *window;
static GtkLabel *label;
static GtkProgressBar *progress;

static void
setup_progress_dialog (gboolean tasks)
{
    GtkWidget *vbox, *hbox, *w;
    
    window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title ((GtkWindow *) window, _("Migrating..."));
    gtk_window_set_modal ((GtkWindow *) window, TRUE);
    gtk_container_set_border_width ((GtkContainer *) window, 6);
    
    vbox = gtk_vbox_new (FALSE, 6);
    gtk_widget_show (vbox);
    gtk_container_add ((GtkContainer *) window, vbox);
    
    if (tasks)
        w = gtk_label_new (_("The location and hierarchy of the Evolution task "
                     "folders has changed since Evolution 1.x.\n\nPlease be "
                     "patient while Evolution migrates your folders..."));
    else
        w = gtk_label_new (_("The location and hierarchy of the Evolution calendar "
                     "folders has changed since Evolution 1.x.\n\nPlease be "
                     "patient while Evolution migrates your folders..."));

    gtk_label_set_line_wrap ((GtkLabel *) w, TRUE);
    gtk_widget_show (w);
    gtk_box_pack_start_defaults ((GtkBox *) vbox, w);
    
    hbox = gtk_hbox_new (FALSE, 6);
    gtk_widget_show (hbox);
    gtk_box_pack_start_defaults ((GtkBox *) vbox, hbox);
    
    label = (GtkLabel *) gtk_label_new ("");
    gtk_widget_show ((GtkWidget *) label);
    gtk_box_pack_start_defaults ((GtkBox *) hbox, (GtkWidget *) label);
    
    progress = (GtkProgressBar *) gtk_progress_bar_new ();
    gtk_widget_show ((GtkWidget *) progress);
    gtk_box_pack_start_defaults ((GtkBox *) hbox, (GtkWidget *) progress);
    
    gtk_widget_show (window);
}

static void
dialog_close (void)
{
    gtk_widget_destroy ((GtkWidget *) window);
}

static void
dialog_set_folder_name (const char *folder_name)
{
    char *text;
    
    text = g_strdup_printf (_("Migrating `%s':"), folder_name);
    gtk_label_set_text (label, text);
    g_free (text);
    
    gtk_progress_bar_set_fraction (progress, 0.0);
    
    while (gtk_events_pending ())
        gtk_main_iteration ();
}

static void
dialog_set_progress (double percent)
{
    char text[5];
    
    snprintf (text, sizeof (text), "%d%%", (int) (percent * 100.0f));
    
    gtk_progress_bar_set_fraction (progress, percent);
    gtk_progress_bar_set_text (progress, text);
    
    while (gtk_events_pending ())
        gtk_main_iteration ();
}

static gboolean
check_for_conflict (ESourceGroup *group, char *name)
{
    GSList *sources;
    GSList *s;

    sources = e_source_group_peek_sources (group);

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

        if (!strcmp (e_source_peek_name (source), name))
            return TRUE;
    }

    return FALSE;
}

static char *
get_source_name (ESourceGroup *group, const char *path)
{
    char **p = g_strsplit (path, "/", 0);
    int i, j, starting_index;
    int num_elements;
    gboolean conflict;
    GString *s = g_string_new ("");

    for (i = 0; p[i]; i ++) ;

    num_elements = i;
    i--;

    /* p[i] is now the last path element */

    /* check if it conflicts */
    starting_index = i;
    do {
        g_string_assign (s, "");
        for (j = starting_index; j < num_elements; j += 2) {
            if (j != starting_index)
                g_string_append_c (s, '_');
            g_string_append (s, p[j]);
        }

        conflict = check_for_conflict (group, s->str);


        /* if there was a conflict back up 2 levels (skipping the /subfolder/ element) */
        if (conflict)
            starting_index -= 2;

        /* we always break out if we can't go any further,
           regardless of whether or not we conflict. */
        if (starting_index < 0)
            break;

    } while (conflict);

    return g_string_free (s, FALSE);
}

static gboolean
migrate_ical (ECal *old_ecal, ECal *new_ecal)
{
    GList *l, *objects;
    int num_added = 0;
    int num_objects;
    gboolean retval = TRUE;
    
    /* both ecals are loaded, start the actual migration */
    if (!e_cal_get_object_list (old_ecal, "#t", &objects, NULL))
        return FALSE;

    num_objects = g_list_length (objects);
    for (l = objects; l; l = l->next) {
        icalcomponent *ical_comp = l->data;
        GError *error = NULL;

        if (!e_cal_create_object (new_ecal, ical_comp, NULL, &error)) {
            g_warning ("Migration of object failed: %s", error->message);
            retval = FALSE;
        }
        
        g_clear_error (&error);

        num_added ++;
        dialog_set_progress ((double)num_added / num_objects);
    }

    return retval;
}

static gboolean
migrate_ical_folder_to_source (char *old_path, ESource *new_source, ECalSourceType type)
{
    ECal *old_ecal = NULL, *new_ecal = NULL;
    ESource *old_source;
    ESourceGroup *group;
    char *old_uri = g_strdup_printf ("file://%s", old_path);
    GError *error = NULL;
    gboolean retval = FALSE;
    
    group = e_source_group_new ("", old_uri);
    old_source = e_source_new ("", "");
    e_source_group_add_source (group, old_source, -1);

    dialog_set_folder_name (e_source_peek_name (new_source));

    old_ecal = e_cal_new (old_source, type);
    if (!e_cal_open (old_ecal, TRUE, &error)) {
        g_warning ("failed to load source ecal for migration: '%s' (%s)", error->message,
               e_source_get_uri (old_source));
        goto finish;
    }

    new_ecal = e_cal_new (new_source, type);
    if (!e_cal_open (new_ecal, FALSE, &error)) {
        g_warning ("failed to load destination ecal for migration: '%s' (%s)", error->message,
               e_source_get_uri (new_source));
        goto finish;
    }

    retval = migrate_ical (old_ecal, new_ecal);

finish:
    g_clear_error (&error);
    g_object_unref (old_ecal);
    g_object_unref (group);
    if (new_ecal)
        g_object_unref (new_ecal);
    g_free (old_uri);

    return retval;  
}

static gboolean
migrate_ical_folder (char *old_path, ESourceGroup *dest_group, char *source_name, ECalSourceType type)
{
    ESource *new_source;
    gboolean retval;
    
    new_source = e_source_new (source_name, source_name);
    e_source_set_relative_uri (new_source, e_source_peek_uid (new_source));
    e_source_group_add_source (dest_group, new_source, -1);

    retval = migrate_ical_folder_to_source (old_path, new_source, type);

    g_object_unref (new_source);

    return retval;
}


#define WEBCAL_BASE_URI "webcal://"
#define CONTACTS_BASE_URI "contacts://"
#define BAD_CONTACTS_BASE_URI "contact://"
#define PERSONAL_RELATIVE_URI "system"

static ESourceGroup *
create_calendar_contact_source (ESourceList *source_list)
{
    ESourceGroup *group;
    ESource *source;
    
    /* Create the contacts group */
    group = e_source_group_new (_("Contacts"), CONTACTS_BASE_URI);
    e_source_list_add_group (source_list, group, -1);

    source = e_source_new (_("Birthdays & Anniversaries"), "/");
    e_source_group_add_source (group, source, -1);
    g_object_unref (source);

    e_source_set_color (source, 0xFED4D3);
    e_source_group_set_readonly (group, TRUE);

    return group;
}

static void
create_calendar_sources (CalendarComponent *component,
             ESourceList   *source_list,
             ESourceGroup **on_this_computer,
             ESource **personal_source,
             ESourceGroup **on_the_web,
             ESourceGroup **contacts)
{
    GSList *groups;
    ESourceGroup *group;
    char *base_uri, *base_uri_proto;

    *on_this_computer = NULL;
    *on_the_web = NULL;
    *contacts = NULL;
    *personal_source = NULL;

    base_uri = g_build_filename (calendar_component_peek_base_directory (component),
                     "/calendar/local/",
                     NULL);

    base_uri_proto = g_strconcat ("file://", base_uri, NULL);

    groups = e_source_list_peek_groups (source_list);
    if (groups) {
        /* groups are already there, we need to search for things... */
        GSList *g;

        for (g = groups; g; g = g->next) {

            group = E_SOURCE_GROUP (g->data);

            if (!strcmp (BAD_CONTACTS_BASE_URI, e_source_group_peek_base_uri (group)))
                e_source_group_set_base_uri (group, CONTACTS_BASE_URI);

            if (!strcmp (base_uri, e_source_group_peek_base_uri (group)))
                e_source_group_set_base_uri (group, base_uri_proto);

            if (!*on_this_computer && !strcmp (base_uri_proto, e_source_group_peek_base_uri (group)))
                *on_this_computer = g_object_ref (group);
            else if (!*on_the_web && !strcmp (WEBCAL_BASE_URI, e_source_group_peek_base_uri (group)))
                *on_the_web = g_object_ref (group);
            else if (!*contacts && !strcmp (CONTACTS_BASE_URI, e_source_group_peek_base_uri (group)))
                *contacts = g_object_ref (group);
        }
    }

    if (*on_this_computer) {
        /* make sure "Personal" shows up as a source under
           this group */
        GSList *sources = e_source_group_peek_sources (*on_this_computer);
        GSList *s;
        for (s = sources; s; s = s->next) {
            ESource *source = E_SOURCE (s->data);
            if (!strcmp (PERSONAL_RELATIVE_URI, e_source_peek_relative_uri (source))) {
                *personal_source = g_object_ref (source);
                break;
            }
        }
    } else {
        /* create the local source group */
        group = e_source_group_new (_("On This Computer"), base_uri_proto);
        e_source_list_add_group (source_list, group, -1);

        *on_this_computer = group;
    }

    if (!*personal_source) {
        /* Create the default Person calendar */
        ESource *source = e_source_new (_("Personal"), PERSONAL_RELATIVE_URI);
        e_source_group_add_source (*on_this_computer, source, -1);
        
        if (!calendar_config_get_primary_calendar () && !calendar_config_get_calendars_selected ()) {
            GSList selected;

            calendar_config_set_primary_calendar (e_source_peek_uid (source));

            selected.data = (gpointer)e_source_peek_uid (source);
            selected.next = NULL;
            calendar_config_set_calendars_selected (&selected);
        }
        
        e_source_set_color (source, 0xBECEDD);
        *personal_source = source;
    }

    if (!*on_the_web) {
        /* Create the Webcal source group */
        group = e_source_group_new (_("On The Web"), WEBCAL_BASE_URI);
        e_source_list_add_group (source_list, group, -1);

        *on_the_web = group;
    }

    if (!*contacts) {
        group = create_calendar_contact_source (source_list);

        *contacts = group;
    }
    
    g_free (base_uri_proto);
    g_free (base_uri);
}

static void
create_task_sources (TasksComponent *component,
             ESourceList   *source_list,
             ESourceGroup **on_this_computer,
             ESourceGroup **on_the_web,
             ESource **personal_source)
{
    GSList *groups;
    ESourceGroup *group;
    char *base_uri, *base_uri_proto;

    *on_this_computer = NULL;
    *on_the_web = NULL;
    *personal_source = NULL;
    
    base_uri = g_build_filename (tasks_component_peek_base_directory (component),
                     "tasks", "local", NULL);

    base_uri_proto = g_strconcat ("file://", base_uri, NULL);

    groups = e_source_list_peek_groups (source_list);
    if (groups) {
        /* groups are already there, we need to search for things... */
        GSList *g;

        for (g = groups; g; g = g->next) {

            group = E_SOURCE_GROUP (g->data);

            if (!*on_this_computer && !strcmp (base_uri_proto, e_source_group_peek_base_uri (group)))
                *on_this_computer = g_object_ref (group);
            else if (!*on_the_web && !strcmp (WEBCAL_BASE_URI, e_source_group_peek_base_uri (group)))
                *on_the_web = g_object_ref (group);
        }
    }

    if (*on_this_computer) {
        /* make sure "Personal" shows up as a source under
           this group */
        GSList *sources = e_source_group_peek_sources (*on_this_computer);
        GSList *s;
        for (s = sources; s; s = s->next) {
            ESource *source = E_SOURCE (s->data);
            if (!strcmp (PERSONAL_RELATIVE_URI, e_source_peek_relative_uri (source))) {
                *personal_source = g_object_ref (source);
                break;
            }
        }
    } else {
        /* create the local source group */
        group = e_source_group_new (_("On This Computer"), base_uri_proto);
        e_source_list_add_group (source_list, group, -1);

        *on_this_computer = group;
    }

    if (!*personal_source) {
        /* Create the default Person task list */
        ESource *source = e_source_new (_("Personal"), PERSONAL_RELATIVE_URI);
        e_source_group_add_source (*on_this_computer, source, -1);

        if (!calendar_config_get_primary_tasks () && !calendar_config_get_tasks_selected ()) {
            GSList selected;

            calendar_config_set_primary_tasks (e_source_peek_uid (source));

            selected.data = (gpointer)e_source_peek_uid (source);
            selected.next = NULL;
            calendar_config_set_tasks_selected (&selected);
        }

        e_source_set_color (source, 0xBECEDD);
        *personal_source = source;
    }

    if (!*on_the_web) {
        /* Create the Webcal source group */
        group = e_source_group_new (_("On The Web"), WEBCAL_BASE_URI);
        e_source_list_add_group (source_list, group, -1);

        *on_the_web = group;
    }

    g_free (base_uri_proto);
    g_free (base_uri);
}

static void
migrate_pilot_db_key (const char *key, gpointer user_data)
{
    EXmlHash *xmlhash = user_data;
    
    e_xmlhash_add (xmlhash, key, "");
}

static void
migrate_pilot_data (const char *component, const char *conduit, const char *old_path, const char *new_path)
{
    char *changelog, *map;
    struct dirent *dent;
    const char *ext;
    char *filename;
    DIR *dir;
    
    if (!(dir = opendir (old_path)))
        return;
    
    map = g_alloca (12 + strlen (conduit));
    sprintf (map, "pilot-map-%s-", conduit);
    
    changelog = g_alloca (24 + strlen (conduit));
    sprintf (changelog, "pilot-sync-evolution-%s-", conduit);
    
    while ((dent = readdir (dir))) {
        if (!strncmp (dent->d_name, map, strlen (map)) &&
            ((ext = strrchr (dent->d_name, '.')) && !strcmp (ext, ".xml"))) {
            /* pilot map file - src and dest file formats are identical */
            unsigned char inbuf[4096];
            size_t nread, nwritten;
            int fd0, fd1;
            ssize_t n;
            
            filename = g_build_filename (old_path, dent->d_name, NULL);
            if ((fd0 = open (filename, O_RDONLY)) == -1) {
                g_free (filename);
                continue;
            }
            
            g_free (filename);
            filename = g_build_filename (new_path, dent->d_name, NULL);
            if ((fd1 = open (filename, O_WRONLY | O_CREAT | O_TRUNC, 0666)) == -1) {
                g_free (filename);
                close (fd0);
                continue;
            }
            
            do {
                do {
                    n = read (fd0, inbuf, sizeof (inbuf));
                } while (n == -1 && errno == EINTR);
                
                if (n < 1)
                    break;
                
                nread = n;
                nwritten = 0;
                do {
                    do {
                        n = write (fd1, inbuf + nwritten, nread - nwritten);
                    } while (n == -1 && errno == EINTR);
                    
                    if (n > 0)
                        nwritten += n;
                } while (nwritten < nread && n != -1);
                
                if (n == -1)
                    break;
            } while (1);
            
            if (n != -1)
                n = fsync (fd1);
            
            if (n == -1) {
                g_warning ("Failed to migrate %s: %s", dent->d_name, strerror (errno));
                unlink (filename);
            }
            
            close (fd0);
            close (fd1);
            g_free (filename);
        } else if (!strncmp (dent->d_name, changelog, strlen (changelog)) &&
               ((ext = strrchr (dent->d_name, '.')) && !strcmp (ext, ".db"))) {
            /* src and dest formats differ, src format is db3 while dest format is xml */
            EXmlHash *xmlhash;
            EDbHash *dbhash;
            struct stat st;
            
            filename = g_build_filename (old_path, dent->d_name, NULL);
            if (stat (filename, &st) == -1) {
                g_free (filename);
                continue;
            }
            
            dbhash = e_dbhash_new (filename);
            g_free (filename);
            
            filename = g_strdup_printf ("%s/%s.ics-%s", new_path, component, dent->d_name);
            if (stat (filename, &st) != -1)
                unlink (filename);
            xmlhash = e_xmlhash_new (filename);
            g_free (filename);
            
            e_dbhash_foreach_key (dbhash, migrate_pilot_db_key, xmlhash);
            
            e_dbhash_destroy (dbhash);
            
            e_xmlhash_write (xmlhash);
            e_xmlhash_destroy (xmlhash);
        }
    }
    
    closedir (dir);
}

gboolean
migrate_calendars (CalendarComponent *component, int major, int minor, int revision, GError **err)
{
    ESourceGroup *on_this_computer = NULL, *on_the_web = NULL, *contacts = NULL;
    ESource *personal_source = NULL;
    ECalEvent *ece;
    ECalEventTargetComponent *target;
    gboolean retval = FALSE;

    /* we call this unconditionally now - create_groups either
       creates the groups/sources or it finds the necessary
       groups/sources. */
    create_calendar_sources (component, calendar_component_peek_source_list (component), &on_this_computer, &personal_source, &on_the_web, &contacts);

    if (major == 1) {
        xmlDocPtr config_doc = NULL;
        char *conf_file;
        struct stat st;

        conf_file = g_build_filename (g_get_home_dir (), "evolution", "config.xmldb", NULL);
        if (lstat (conf_file, &st) == 0 && S_ISREG (st.st_mode)) 
            config_doc = xmlParseFile (conf_file);
        g_free (conf_file);
        
        if (config_doc && minor <= 2) {
            GConfClient *gconf; 
            int res = 0;
            
            /* move bonobo config to gconf */
            gconf = gconf_client_get_default ();
            
            res = e_bconf_import (gconf, config_doc, calendar_remap_list);
            
            g_object_unref (gconf);
            
            xmlFreeDoc(config_doc);

            if (res != 0) {
                /* FIXME: set proper domain/code */
                g_set_error(err, 0, 0, _("Unable to migrate old settings from evolution/config.xmldb"));
                goto fail;
            }
        }

        if (minor <= 4) {
            GSList *migration_dirs, *l;
            char *path, *local_cal_folder;

            setup_progress_dialog (FALSE);

            path = g_build_filename (g_get_home_dir (), "evolution", "local", NULL);
            migration_dirs = e_folder_map_local_folders (path, "calendar");
            local_cal_folder = g_build_filename (path, "Calendar", NULL);
            g_free (path);

            if (personal_source)
                migrate_ical_folder_to_source (local_cal_folder, personal_source, E_CAL_SOURCE_TYPE_EVENT);

            for (l = migration_dirs; l; l = l->next) {
                char *source_name;
            
                if (personal_source && !strcmp ((char*)l->data, local_cal_folder))
                    continue;

                source_name = get_source_name (on_this_computer, (char*)l->data);

                if (!migrate_ical_folder (l->data, on_this_computer, source_name, E_CAL_SOURCE_TYPE_EVENT)) {
                    /* FIXME: domain/code */
                    g_set_error(err, 0, 0, _("Unable to migrate calendar `%s'"), source_name);
                    g_free(source_name);
                    goto fail;
                }
                
                g_free (source_name);
            }
            
            g_free (local_cal_folder);

            dialog_close ();
        }

        if (minor <= 4 || (minor == 5 && revision < 5)) {
            GConfClient *gconf; 
            GConfValue *gconf_val;
            int i;
            const char *keys[] = {
                CALENDAR_CONFIG_HPANE_POS,
                CALENDAR_CONFIG_VPANE_POS,
                CALENDAR_CONFIG_MONTH_HPANE_POS,
                CALENDAR_CONFIG_MONTH_VPANE_POS,
                NULL
            };
            
            gconf = gconf_client_get_default ();
            
            for (i = 0; keys[i]; i++) {
                gconf_val = gconf_client_get (gconf, keys[i], NULL);
                if (gconf_val) {
                    if (gconf_val->type != GCONF_VALUE_INT)
                        gconf_client_unset (gconf, keys[i], NULL);
                    gconf_value_free (gconf_val);
                }
            }
            
            g_object_unref (gconf);
        }
        
        if (minor < 5 || (minor == 5 && revision <= 10)) {
            char *old_path, *new_path;
            
            old_path = g_build_filename (g_get_home_dir (), "evolution", "local", "Calendar", NULL);
            new_path = g_build_filename (calendar_component_peek_base_directory (component),
                             "calendar", "local", "system", NULL);
            migrate_pilot_data ("calendar", "calendar", old_path, new_path);
            g_free (new_path);
            g_free (old_path);
        }

        /* we only need to do this next step if people ran
           older versions of 1.5.  We need to clear out the
           absolute URI's that were assigned to ESources
           during one phase of development, as they take
           precedent over relative uris (but aren't updated
           when editing an ESource). */
        if (minor == 5 && revision <= 11) {
            GSList *g;
            for (g = e_source_list_peek_groups (calendar_component_peek_source_list (component)); g; g = g->next) {
                ESourceGroup *group = g->data;
                GSList *s;

                for (s = e_source_group_peek_sources (group); s; s = s->next) {
                    ESource *source = s->data;
                    e_source_set_absolute_uri (source, NULL);
                }
            }
        }

    }

    e_source_list_sync (calendar_component_peek_source_list (component), NULL);

    /** @Event: component.migration
     * @Title: Migration step in component initialization
     * @Target: ECalEventTargetComponent
     * 
     * component.migration is emitted during the calendar component
     * initialization process. This allows new calendar backend types
     * to be distributed as an e-d-s backend and a plugin without
     * reaching their grubby little fingers into migration.c
     */
    /* Fire off migration event */
    ece = e_cal_event_peek ();
    target = e_cal_event_target_new_component (ece, calendar_component_peek (), 0);
    e_event_emit ((EEvent *) ece, "component.migration", (EEventTarget *) target);

    retval = TRUE;
fail:
    if (on_this_computer)
        g_object_unref (on_this_computer);
    if (on_the_web)
        g_object_unref (on_the_web);
    if (contacts)
        g_object_unref (contacts);
    if (personal_source)
        g_object_unref (personal_source);

    return retval;
}

gboolean
migrate_tasks (TasksComponent *component, int major, int minor, int revision, GError **err)
{
    ESourceGroup *on_this_computer = NULL;
    ESourceGroup *on_the_web = NULL;
    ESource *personal_source = NULL;
    gboolean retval = FALSE;

    /* we call this unconditionally now - create_groups either
       creates the groups/sources or it finds the necessary
       groups/sources. */
    create_task_sources (component, tasks_component_peek_source_list (component), &on_this_computer, &on_the_web, &personal_source);
    
    if (major == 1) {
        xmlDocPtr config_doc = NULL;
        char *conf_file;
        struct stat st;

        conf_file = g_build_filename (g_get_home_dir (), "evolution", "config.xmldb", NULL);
        if (lstat (conf_file, &st) == 0 && S_ISREG (st.st_mode)) 
            config_doc = xmlParseFile (conf_file);
        g_free (conf_file);
        
        if (config_doc && minor <= 2) {
            GConfClient *gconf; 
            int res = 0;
            
            /* move bonobo config to gconf */
            gconf = gconf_client_get_default ();
            
            res = e_bconf_import (gconf, config_doc, task_remap_list);
            
            g_object_unref (gconf);
            
            xmlFreeDoc(config_doc);

            if (res != 0) {
                g_set_error(err, 0, 0, _("Unable to migrate old settings from evolution/config.xmldb"));
                goto fail;
            }
        }

        if (minor <= 4) {
            GSList *migration_dirs, *l;
            char *path, *local_task_folder;
            
            setup_progress_dialog (TRUE);
            
            path = g_build_filename (g_get_home_dir (), "evolution", "local", NULL);
            migration_dirs = e_folder_map_local_folders (path, "tasks");
            local_task_folder = g_build_filename (path, "Tasks", NULL);
            g_free (path);

            if (personal_source)
                migrate_ical_folder_to_source (local_task_folder, personal_source, E_CAL_SOURCE_TYPE_TODO);

            for (l = migration_dirs; l; l = l->next) {
                char *source_name;
            
                if (personal_source && !strcmp ((char*)l->data, local_task_folder))
                    continue;

                source_name = get_source_name (on_this_computer, (char*)l->data);

                if (!migrate_ical_folder (l->data, on_this_computer, source_name, E_CAL_SOURCE_TYPE_TODO)) {
                    /* FIXME: domain/code */
                    g_set_error(err, 0, 0, _("Unable to migrate tasks `%s'"), source_name);
                    g_free(source_name);
                    goto fail;
                }
                
                g_free (source_name);
            }
            
            g_free (local_task_folder);

            dialog_close ();
        }
        
        if (minor < 5 || (minor == 5 && revision <= 10)) {
            char *old_path, *new_path;
            
            old_path = g_build_filename (g_get_home_dir (), "evolution", "local", "Tasks", NULL);
            new_path = g_build_filename (tasks_component_peek_base_directory (component),
                             "tasks", "local", "system", NULL);
            migrate_pilot_data ("tasks", "todo", old_path, new_path);
            g_free (new_path);
            g_free (old_path);
        }

        /* we only need to do this next step if people ran
           older versions of 1.5.  We need to clear out the
           absolute URI's that were assigned to ESources
           during one phase of development, as they take
           precedent over relative uris (but aren't updated
           when editing an ESource). */
        if (minor == 5 && revision <= 11) {
            GSList *g;
            for (g = e_source_list_peek_groups (tasks_component_peek_source_list (component)); g; g = g->next) {
                ESourceGroup *group = g->data;
                GSList *s;

                for (s = e_source_group_peek_sources (group); s; s = s->next) {
                    ESource *source = s->data;
                    e_source_set_absolute_uri (source, NULL);
                }
            }
        }
    }

    e_source_list_sync (tasks_component_peek_source_list (component), NULL);
    retval = TRUE;
fail:
    if (on_this_computer)
        g_object_unref (on_this_computer);
    if (on_the_web)
        g_object_unref (on_the_web);
    if (personal_source)
        g_object_unref (personal_source);
    
        return retval;
}