path: root/mail/importers/elm-importer.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* elm-importer.c
 * 
 * Authors: 
 *    Iain Holmes  <iain@ximian.com>
 *
 * Copyright 2001 Ximian, Inc. (www.ximian.com)
 *
 * 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
 */

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

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

#include <glib.h>
#include <gnome.h>

#include <gconf/gconf.h>
#include <gconf/gconf-client.h>

#include <bonobo/bonobo-object.h>
#include <bonobo/bonobo-control.h>
#include <bonobo/bonobo-context.h>
#include <bonobo/bonobo-generic-factory.h>
#include <bonobo/bonobo-main.h>
#include <bonobo/bonobo-exception.h>
#include <bonobo/bonobo-moniker-util.h>

#include <bonobo-activation/bonobo-activation.h>

#include <importer/evolution-intelligent-importer.h>
#include <importer/evolution-importer-client.h>
#include <importer/GNOME_Evolution_Importer.h>

#include "mail/mail-importer.h"

#define ELM_INTELLIGENT_IMPORTER_IID "OAFIID:GNOME_Evolution_Mail_Elm_Intelligent_Importer_Factory"
#define MBOX_IMPORTER_IID "OAFIID:GNOME_Evolution_Mail_Mbox_Importer"
#define KEY "elm-mail-imported"

/*#define SUPER_IMPORTER_DEBUG*/
#ifdef SUPER_IMPORTER_DEBUG
#define d(x) x
#else
#define d(x)
#endif

typedef struct {
    EvolutionIntelligentImporter *ii;

    GList *dir_list;

    int progress_count;
    int more;
    EvolutionImporterResult result;

    GNOME_Evolution_Importer importer;
    EvolutionImporterListener *listener;
    
    GtkWidget *mail;
    gboolean do_mail;

    GtkWidget *dialog;
    GtkWidget *label;
    GtkWidget *progressbar;
} ElmImporter;

typedef struct {
    char *parent;
    char *foldername;
    char *path;
} ElmFolder;

static GHashTable *elm_prefs = NULL;

void mail_importer_module_init (void);

static void import_next (ElmImporter *importer);

static GtkWidget *
create_importer_gui (ElmImporter *importer)
{
    GtkWidget *dialog;

    dialog = gnome_message_box_new (_("Evolution is importing your old Elm mail"), GNOME_MESSAGE_BOX_INFO, NULL);
    gtk_window_set_title (GTK_WINDOW (dialog), _("Importing..."));

    importer->label = gtk_label_new (_("Please wait"));
    importer->progressbar = gtk_progress_bar_new ();
    gtk_progress_set_activity_mode (GTK_PROGRESS (importer->progressbar), TRUE);
    gtk_box_pack_start (GTK_BOX (GNOME_DIALOG (dialog)->vbox), importer->label, FALSE, FALSE, 0);
    gtk_box_pack_start (GTK_BOX (GNOME_DIALOG (dialog)->vbox), importer->progressbar, FALSE, FALSE, 0);

    return dialog;
}

static void
elm_store_settings (ElmImporter *importer)
{
    GConfClient *gconf;

    gconf = gconf_client_get_default ();
    gconf_client_set_bool (gconf, "/apps/evolution/importer/elm/mail", importer->do_mail, NULL);
}

static void
elm_restore_settings (ElmImporter *importer)
{
    GConfClient *gconf = gconf_client_get_default ();

    importer->do_mail = gconf_client_get_bool (gconf, "/apps/evolution/importer/elm/mail", NULL);
}

static void
importer_cb (EvolutionImporterListener *listener,
         EvolutionImporterResult result,
         gboolean more_items,
         void *data)
{
    ElmImporter *importer = (ElmImporter *) data;

    importer->result = result;
    importer->more = more_items;
}

static gboolean
elm_import_file (ElmImporter *importer,
         const char *path,
         const char *folderpath)
{
    CORBA_boolean result;
    CORBA_Environment ev;
    CORBA_Object objref;
    char *str, *uri;
    struct stat st;

    str = g_strdup_printf (_("Importing %s as %s"), path, folderpath);
    gtk_label_set_text (GTK_LABEL (importer->label), str);
    g_free (str);
    while (g_main_context_iteration(NULL, FALSE))
        ;

    uri = mail_importer_make_local_folder(folderpath);
    if (!uri)
        return FALSE;

    /* if its a dir, we just create it, but dont add anything */
    if (lstat(path, &st) == 0 && S_ISDIR(st.st_mode)) {
        g_free(uri);
        /* this is ok, we return false to say we haven't launched an async task */
        return FALSE;
    }

    CORBA_exception_init(&ev);

    result = GNOME_Evolution_Importer_loadFile (importer->importer, path, uri, "", &ev);
    g_free(uri);
    if (ev._major != CORBA_NO_EXCEPTION || result == FALSE) {
        g_warning ("Exception here: %s", CORBA_exception_id (&ev));
        CORBA_exception_free (&ev);
        return FALSE;
    }

    /* process all items in a direct loop */
    importer->listener = evolution_importer_listener_new (importer_cb, importer);
    objref = bonobo_object_corba_objref (BONOBO_OBJECT (importer->listener));
    do {
        importer->progress_count++;
        if ((importer->progress_count & 0xf) == 0)
            gtk_progress_bar_pulse(GTK_PROGRESS_BAR(importer->progressbar));

        importer->result = -1;
        GNOME_Evolution_Importer_processItem (importer->importer, objref, &ev);
        if (ev._major != CORBA_NO_EXCEPTION) {
            g_warning ("Exception: %s", CORBA_exception_id (&ev));
            break;
        }

        while (importer->result == -1 || g_main_context_pending(NULL))
            g_main_context_iteration(NULL, TRUE);
    } while (importer->more);

    bonobo_object_unref((BonoboObject *)importer->listener);

    CORBA_exception_free (&ev);

    return FALSE;
}

static void
parse_elm_rc (const char *elmrc)
{
    static gboolean parsed = FALSE;
    char line[4096];
    FILE *handle;
    gboolean exists;

    if (parsed == TRUE)
        return;

    elm_prefs = g_hash_table_new (g_str_hash, g_str_equal);

    exists = g_file_exists (elmrc);
    if (exists == FALSE) {
        parsed = TRUE;
        return;
    }

    handle = fopen (elmrc, "r");
    if (handle == NULL) {
        parsed = TRUE;
        return;
    }

    while (fgets (line, 4096, handle) != NULL) {
        char *linestart, *end;
        char *key, *value;
        if (*line == '#' &&
            (line[1] != '#' && line[2] != '#')) {
            continue;
        } else if (*line == '\n') {
            continue;
        } else if (*line == '#' && line[1] == '#' && line[2] == '#') {
            linestart = line + 4;
        } else {
            linestart = line;
        }

        end = strstr (linestart, " = ");
        if (end == NULL) {
            g_warning ("Broken line");
            continue;
        }

        *end = 0;
        key = g_strdup (linestart);

        linestart = end + 3;
        end = strchr (linestart, '\n');
        if (end == NULL) {
            g_warning ("Broken line");
            g_free (key);
            continue;
        }

        *end = 0;
        value = g_strdup (linestart);

        g_hash_table_insert (elm_prefs, key, value);
    }

    parsed = TRUE;
    fclose (handle);
}

static char *
elm_get_rc_value (const char *value)
{
    if (elm_prefs == NULL)
        return NULL;

    return g_hash_table_lookup (elm_prefs, value);
}

static gboolean
elm_can_import (EvolutionIntelligentImporter *ii,
        void *closure)
{
    ElmImporter *importer = closure;
    char *elmdir, *maildir, *aliasfile;
    char *elmrc;
    gboolean exists, mailexists, aliasexists;
    gboolean mail;
    struct stat st;
    GConfClient *gconf = gconf_client_get_default();

    mail = gconf_client_get_bool(gconf, "/apps/evolution/importer/elm/mail-imported", NULL);
    if (mail)
        return FALSE;
    
    importer->do_mail = !mail;
    gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (importer->mail),
                      importer->do_mail);
    
    elmdir = gnome_util_prepend_user_home (".elm");
    exists = lstat(elmdir, &st) == 0 && S_ISDIR(st.st_mode);
    
    g_free (elmdir);
    if (exists == FALSE)
        return FALSE;

    elmrc = gnome_util_prepend_user_home (".elm/elmrc");
    parse_elm_rc (elmrc);

    maildir = elm_get_rc_value ("maildir");
    if (maildir == NULL) {
        maildir = g_strdup ("Mail");
    } else {
        maildir = g_strdup (maildir);
    }

    if (!g_path_is_absolute (maildir)) {
        elmdir = gnome_util_prepend_user_home (maildir);
    } else {
        elmdir = g_strdup (maildir);
    }

    g_free (maildir);

    mailexists = lstat(elmdir, &st) == 0 && S_ISDIR(st.st_mode);
    g_free (elmdir);

    aliasfile = gnome_util_prepend_user_home (".elm/aliases");
    aliasexists = lstat(aliasfile, &st) == 0 && S_ISREG(st.st_mode);
    g_free (aliasfile);

    exists = (aliasexists || mailexists);

    return exists;
}

static void
import_next (ElmImporter *importer)
{
    ElmFolder *data;

trynext:
    if (importer->dir_list) {
        char *folder;
        GList *l;
        int ok;

        l = importer->dir_list;
        data = l->data;

        folder = g_concat_dir_and_file (data->parent, data->foldername);

        importer->dir_list = l->next;
        g_list_free_1(l);
        
        ok = elm_import_file (importer, data->path, folder);
        g_free (folder);
        g_free (data->parent);
        g_free (data->path);
        g_free (data->foldername);
        g_free (data);
        /* its ugly, but so is everything else in this file */
        if (!ok)
            goto trynext;
    } else {
        bonobo_object_unref((BonoboObject *)importer->ii);
    }
}

static void
scan_dir (ElmImporter *importer,
      const char *orig_parent,
      const char *dirname)
{
    DIR *maildir;
    struct stat buf;
    struct dirent *current;
    char *str;

    maildir = opendir (dirname);
    if (maildir == NULL) {
        g_warning ("Could not open %s\nopendir returned: %s",
               dirname, g_strerror (errno));
        return;
    }
    
    str = g_strdup_printf (_("Scanning %s"), dirname);
    gtk_label_set_text (GTK_LABEL (importer->label), str);
    g_free (str);

    while (gtk_events_pending ()) {
        gtk_main_iteration ();
    }

    current = readdir (maildir);
    while (current) {
        ElmFolder *pf;
        char *fullname;
        
        /* Ignore . and .. */
        if (current->d_name[0] == '.') {
            if (current->d_name[1] == '\0' ||
                (current->d_name[1] == '.' && current->d_name[2] == '\0')) {
                current = readdir (maildir);
                continue;
            }
        }
        
        fullname = g_concat_dir_and_file (dirname, current->d_name);
        if (stat (fullname, &buf) == -1) {
            g_warning ("Could not stat %s\nstat returned: %s",
                   fullname, g_strerror (errno));
            current = readdir (maildir);
            g_free (fullname);
            continue;
        }
        
        if (S_ISREG (buf.st_mode)) {
            pf = g_new (ElmFolder, 1);
            pf->path = g_strdup (fullname);
            pf->parent = g_strdup (orig_parent);
            pf->foldername = g_strdup (current->d_name);
            importer->dir_list = g_list_append (importer->dir_list, pf);
        } else if (S_ISDIR (buf.st_mode)) {
            char *subdir;

            pf = g_new (ElmFolder, 1);
            pf->path = NULL;
            pf->parent = g_strdup (orig_parent);
            pf->foldername = g_strdup (current->d_name);
            importer->dir_list = g_list_append (importer->dir_list, pf);

            subdir = g_concat_dir_and_file (orig_parent, current->d_name);
            scan_dir (importer, subdir, fullname);
            g_free (subdir);
        }
        
        g_free (fullname);
        current = readdir (maildir);
    }
}

static void
elm_create_structure (EvolutionIntelligentImporter *ii,
              void *closure)
{
    ElmImporter *importer = closure;
    char *maildir;

    /* Reference our object so when the shell release_unrefs us
       we will still exist and not go byebye */
    bonobo_object_ref (BONOBO_OBJECT (ii));

    elm_store_settings (importer);

    if (importer->do_mail == TRUE) {
        char *elmdir;
        GConfClient *gconf = gconf_client_get_default();

        importer->dialog = create_importer_gui (importer);
        gtk_widget_show_all (importer->dialog);
        while (gtk_events_pending ()) {
            gtk_main_iteration ();
        }

        gconf_client_set_bool(gconf, "/apps/evolution/importer/elm/mail-imported", TRUE, NULL);
        
        maildir = elm_get_rc_value ("maildir");
        if (maildir == NULL) {
            maildir = g_strdup ("Mail");
        } else {
            maildir = g_strdup (maildir);
        }
        
        if (!g_path_is_absolute (maildir)) {
            elmdir = gnome_util_prepend_user_home (maildir);
        } else {
            elmdir = g_strdup (maildir);
        }
        
        g_free (maildir);
        
        scan_dir (importer, "/", elmdir);
        g_free (elmdir);
        
        /* Import them */
        import_next (importer);
    }

    bonobo_object_unref (BONOBO_OBJECT (ii));
}

static void
elm_destroy_cb (ElmImporter *importer, GtkObject *object)
{
    elm_store_settings (importer);

    if (importer->dialog)
        gtk_widget_destroy(importer->dialog);

    bonobo_object_release_unref (importer->importer, NULL);
}

/* Fun initialisation stuff */
/* Fun control stuff */
static void
checkbox_toggle_cb (GtkToggleButton *tb,
            gboolean *do_item)
{
    *do_item = gtk_toggle_button_get_active (tb);
}

static BonoboControl *
create_checkboxes_control (ElmImporter *importer)
{
    GtkWidget *hbox;
    BonoboControl *control;

    hbox = gtk_vbox_new (FALSE, 2);

    importer->mail = gtk_check_button_new_with_label (_("Mail"));
    gtk_signal_connect (GTK_OBJECT (importer->mail), "toggled",
                GTK_SIGNAL_FUNC (checkbox_toggle_cb),
                &importer->do_mail);

    gtk_box_pack_start (GTK_BOX (hbox), importer->mail, FALSE, FALSE, 0);

    gtk_widget_show_all (hbox);
    control = bonobo_control_new (hbox);
    return control;
}

static BonoboObject *
elm_factory_fn (BonoboGenericFactory *_factory,
        const char *id,
        void *closure)
{
    EvolutionIntelligentImporter *importer;
    BonoboControl *control;
    ElmImporter *elm;
    CORBA_Environment ev;
    char *message = N_("Evolution has found Elm mail files\n"
               "Would you like to import them into Evolution?");

    elm = g_new0 (ElmImporter, 1);

    CORBA_exception_init (&ev);

    elm_restore_settings (elm);

    elm->importer = bonobo_activation_activate_from_id (MBOX_IMPORTER_IID, 0, NULL, &ev);
    if (ev._major != CORBA_NO_EXCEPTION) {
        g_free (elm);
        g_warning ("Could not start MBox importer\n%s", 
               CORBA_exception_id (&ev));
        CORBA_exception_free (&ev);
        return NULL;
    }
    CORBA_exception_free (&ev);

    importer = evolution_intelligent_importer_new (elm_can_import,
                               elm_create_structure,
                               _("Elm"),
                               _(message), elm);
    g_object_weak_ref(G_OBJECT (importer), (GWeakNotify)elm_destroy_cb, elm);
    elm->ii = importer;

    control = create_checkboxes_control (elm);
    bonobo_object_add_interface (BONOBO_OBJECT (importer),
                     BONOBO_OBJECT (control));
    return BONOBO_OBJECT (importer);
}

void
mail_importer_module_init (void)
{
    static gboolean initialised = FALSE;
    BonoboGenericFactory *factory;

    if (initialised == TRUE)
        return;

    factory = bonobo_generic_factory_new (ELM_INTELLIGENT_IMPORTER_IID,
                          elm_factory_fn, NULL);
    if (factory == NULL)
        g_warning ("Could not initialise Elm Intelligent Mail Importer.");
    initialised = TRUE;
}