path: root/mail/importers/elm-importer.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/>
 *
 *
 * Authors:
 *      Iain Holmes  <iain@ximian.com>
 *      Michael Zucchi <notzed@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#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 <string.h>

#include <gtk/gtk.h>
#include <glib/gi18n.h>

#include "mail-importer.h"

#include "libemail-utils/mail-mt.h"
#include "mail/e-mail-backend.h"
#include "e-util/e-import.h"
#include "shell/e-shell.h"

#define d(x)

struct _elm_import_msg {
    MailMsg base;

    EImport *import;
    EImportTargetHome *target;

    GMutex status_lock;
    gchar *status_what;
    gint status_pc;
    gint status_timeout_id;
    GCancellable *status;
};

static GHashTable *
parse_elm_rc (const gchar *elmrc)
{
    gchar line[4096];
    FILE *handle;
    GHashTable *prefs;

    prefs = g_hash_table_new_full (
        g_str_hash, g_str_equal,
        (GDestroyNotify) g_free,
        (GDestroyNotify) g_free);

    if (!g_file_test (elmrc, G_FILE_TEST_IS_REGULAR))
        return prefs;

    handle = fopen (elmrc, "r");
    if (handle == NULL)
        return prefs;

    while (fgets (line, 4096, handle) != NULL) {
        gchar *linestart, *end;
        gchar *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 (prefs, key, value);
    }

    fclose (handle);

    return prefs;
}

static gchar *
elm_get_rc (EImport *ei,
            const gchar *name)
{
    GHashTable *prefs;
    gchar *elmrc;

    prefs = g_object_get_data ((GObject *) ei, "elm-rc");
    if (prefs == NULL) {
        elmrc = g_build_filename (g_get_home_dir (), ".elm/elmrc", NULL);
        prefs = parse_elm_rc (elmrc);
        g_free (elmrc);
        g_object_set_data ((GObject *) ei, "elm-rc", prefs);
    }

    if (prefs == NULL)
        return NULL;
    else
        return g_hash_table_lookup (prefs, name);
}

static gboolean
elm_supported (EImport *ei,
               EImportTarget *target,
               EImportImporter *im)
{
    const gchar *maildir;
    gchar *elmdir;
    gboolean mailexists, exists;

    if (target->type != E_IMPORT_TARGET_HOME)
        return FALSE;

    elmdir = g_build_filename (g_get_home_dir (), ".elm", NULL);
    exists = g_file_test (elmdir, G_FILE_TEST_IS_DIR);
    g_free (elmdir);
    if (!exists)
        return FALSE;

    maildir = elm_get_rc (ei, "maildir");
    if (maildir == NULL)
        maildir = "Mail";

    if (!g_path_is_absolute (maildir))
        elmdir = g_build_filename (g_get_home_dir (), maildir, NULL);
    else
        elmdir = g_strdup (maildir);

    mailexists = g_file_test (elmdir, G_FILE_TEST_IS_DIR);
    g_free (elmdir);

    return mailexists;
}

static gchar *
elm_import_desc (struct _elm_import_msg *m)
{
    return g_strdup (_("Importing Elm data"));
}

static MailImporterSpecial elm_special_folders[] = {
    { "received", "Inbox" },
    { NULL },
};

static void
elm_import_exec (struct _elm_import_msg *m,
                 GCancellable *cancellable,
                 GError **error)
{
    EShell *shell;
    EShellBackend *shell_backend;
    EMailSession *session;
    const gchar *maildir;
    gchar *elmdir;

    /* XXX Dig up the EMailSession from the default EShell.
     *     Since the EImport framework doesn't allow for user
     *     data, I don't see how else to get to it. */
    shell = e_shell_get_default ();
    shell_backend = e_shell_get_backend_by_name (shell, "mail");
    session = e_mail_backend_get_session (E_MAIL_BACKEND (shell_backend));

    maildir = elm_get_rc (m->import, "maildir");
    if (maildir == NULL)
        maildir = "Mail";

    if (!g_path_is_absolute (maildir))
        elmdir = g_build_filename (g_get_home_dir (), maildir, NULL);
    else
        elmdir = g_strdup (maildir);

    mail_importer_import_folders_sync (
        session, elmdir, elm_special_folders, 0, m->status);
    g_free (elmdir);
}

static void
elm_import_done (struct _elm_import_msg *m)
{
    e_import_complete (m->import, (EImportTarget *) m->target);
}

static void
elm_import_free (struct _elm_import_msg *m)
{
    g_object_unref (m->status);

    g_free (m->status_what);
    g_mutex_clear (&m->status_lock);

    g_source_remove (m->status_timeout_id);
    m->status_timeout_id = 0;

    g_object_unref (m->import);
}

static void
elm_status (CamelOperation *op,
            const gchar *what,
            gint pc,
            gpointer data)
{
    struct _elm_import_msg *importer = data;

    g_mutex_lock (&importer->status_lock);
    g_free (importer->status_what);
    importer->status_what = g_strdup (what);
    importer->status_pc = pc;
    g_mutex_unlock (&importer->status_lock);
}

static gboolean
elm_status_timeout (gpointer data)
{
    struct _elm_import_msg *importer = data;
    gint pc;
    gchar *what;

    if (importer->status_what) {
        g_mutex_lock (&importer->status_lock);
        what = importer->status_what;
        importer->status_what = NULL;
        pc = importer->status_pc;
        g_mutex_unlock (&importer->status_lock);

        e_import_status (
            importer->import, (EImportTarget *)
            importer->target, what, pc);
    }

    return TRUE;
}

static MailMsgInfo elm_import_info = {
    sizeof (struct _elm_import_msg),
    (MailMsgDescFunc) elm_import_desc,
    (MailMsgExecFunc) elm_import_exec,
    (MailMsgDoneFunc) elm_import_done,
    (MailMsgFreeFunc) elm_import_free
};

static gint
mail_importer_elm_import (EImport *ei,
                          EImportTarget *target)
{
    struct _elm_import_msg *m;
    gint id;

    m = mail_msg_new (&elm_import_info);
    g_datalist_set_data (&target->data, "elm-msg", m);
    m->import = ei;
    g_object_ref (m->import);
    m->target = (EImportTargetHome *) target;
    m->status_timeout_id = g_timeout_add (100, elm_status_timeout, m);
    g_mutex_init (&m->status_lock);
    m->status = camel_operation_new ();

    g_signal_connect (
        m->status, "status",
        G_CALLBACK (elm_status), m);

    id = m->base.seq;

    mail_msg_fast_ordered_push (m);

    return id;
}

static void
checkbox_toggle_cb (GtkToggleButton *tb,
                    EImportTarget *target)
{
    g_datalist_set_data (
        &target->data, "elm-do-mail",
        GINT_TO_POINTER (gtk_toggle_button_get_active (tb)));
}

static GtkWidget *
elm_getwidget (EImport *ei,
               EImportTarget *target,
               EImportImporter *im)
{
    GtkWidget *box, *w;

    g_datalist_set_data (
        &target->data, "elm-do-mail", GINT_TO_POINTER (TRUE));

    box = gtk_vbox_new (FALSE, 2);

    w = gtk_check_button_new_with_label (_("Mail"));
    gtk_toggle_button_set_active ((GtkToggleButton *) w, TRUE);
    g_signal_connect (
        w, "toggled",
        G_CALLBACK (checkbox_toggle_cb), target);

    gtk_box_pack_start ((GtkBox *) box, w, FALSE, FALSE, 0);
    gtk_widget_show_all (box);

    return box;
}

static void
elm_import (EImport *ei,
            EImportTarget *target,
            EImportImporter *im)
{
    if (GPOINTER_TO_INT (g_datalist_get_data (&target->data, "elm-do-mail")))
        mail_importer_elm_import (ei, target);
    else
        e_import_complete (ei, target);
}

static void
elm_cancel (EImport *ei,
            EImportTarget *target,
            EImportImporter *im)
{
    struct _elm_import_msg *m = g_datalist_get_data (&target->data, "elm-msg");

    if (m)
        g_cancellable_cancel (m->status);
}

static EImportImporter elm_importer = {
    E_IMPORT_TARGET_HOME,
    0,
    elm_supported,
    elm_getwidget,
    elm_import,
    elm_cancel,
    NULL, /* get_preview */
};

EImportImporter *
elm_importer_peek (void)
{
    elm_importer.name = _("Evolution Elm importer");
    elm_importer.description = _("Import mail from Elm.");

    return &elm_importer;
}