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/*
 * 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 <gconf/gconf-client.h>

#include <camel/camel-operation.h>

#include "mail-importer.h"

#include "mail/mail-mt.h"
#include "e-util/e-import.h"
#include "e-util/e-error.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;
    CamelOperation *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)
{
    EImportTargetHome *s;
    const gchar *maildir;
    gchar *elmdir;
    gboolean mailexists, exists;

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

    s = (EImportTargetHome *)target;

    elmdir = g_build_filename(s->homedir, ".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(s->homedir, 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)
{
    const gchar *maildir;
    gchar *elmdir;

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

    if (!g_path_is_absolute(maildir))
        elmdir = g_build_filename(m->target->homedir, maildir, NULL);
    else
        elmdir = g_strdup(maildir);

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

static void
elm_import_done(struct _elm_import_msg *m)
{
    printf("importing complete\n");

    if (!camel_exception_is_set(&m->base.ex)) {
        GConfClient *gconf;

        gconf = gconf_client_get_default();
        gconf_client_set_bool(gconf, "/apps/evolution/importer/elm/mail", TRUE, NULL);
        g_object_unref(gconf);
    }

    e_import_complete(m->import, (EImportTarget *)m->target);
}

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

    g_free(m->status_what);
    g_mutex_free(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;

    if (pc == CAMEL_OPERATION_START)
        pc = 0;
    else if (pc == CAMEL_OPERATION_END)
        pc = 100;

    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);
    m->status_lock = g_mutex_new();
    m->status = camel_operation_new(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;
    GConfClient *gconf;
    gboolean done_mail;

    gconf = gconf_client_get_default ();
    done_mail = gconf_client_get_bool (gconf, "/apps/evolution/importer/elm/mail", NULL);
    g_object_unref(gconf);

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

    box = gtk_vbox_new(FALSE, 2);

    w = gtk_check_button_new_with_label(_("Mail"));
    gtk_toggle_button_set_active((GtkToggleButton *)w, !done_mail);
    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)
        camel_operation_cancel(m->status);
}

static EImportImporter elm_importer = {
    E_IMPORT_TARGET_HOME,
    0,
    elm_supported,
    elm_getwidget,
    elm_import,
    elm_cancel,
};

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

    return &elm_importer;
}