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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 <libebook/e-book.h>
#include <libebook/e-destination.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 _pine_import_msg {
    MailMsg base;

    EImport *import;
    EImportTarget *target;

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

static gboolean
pine_supported(EImport *ei, EImportTarget *target, EImportImporter *im)
{
    EImportTargetHome *s;
    gchar *maildir, *addrfile;
    gboolean md_exists, addr_exists;

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

    s = (EImportTargetHome *)target;

    maildir = g_build_filename(s->homedir, "mail", NULL);
    md_exists = g_file_test(maildir, G_FILE_TEST_IS_DIR);
    g_free(maildir);

    addrfile = g_build_filename(s->homedir, ".addressbook", NULL);
    addr_exists = g_file_test(addrfile, G_FILE_TEST_IS_REGULAR);
    g_free (addrfile);

    return md_exists || addr_exists;
}

/*
See: http://www.washington.edu/pine/tech-notes/low-level.html

addressbook line is:
     <nickname>TAB<fullname>TAB<address>TAB<fcc>TAB<comments>
lists, address is:
     "(" <address>, <address>, <address>, ... ")"

<address> is rfc822 address, or alias address.
if rfc822 address includes a phrase, then that overrides <fullname>

FIXME: we dont handle aliases in lists.
*/

static void
import_contact(EBook *book, gchar *line)
{
    gchar **strings, *addr, **addrs;
    gint i;
    GList *list;
    /*EContactName *name;*/
    EContact *card;
    size_t len;

    card = e_contact_new();
    strings = g_strsplit(line, "\t", 5);
    if (strings[0] && strings[1] && strings[2]) {
        e_contact_set(card, E_CONTACT_NICKNAME, strings[0]);
        e_contact_set(card, E_CONTACT_FULL_NAME, strings[1]);

        addr = strings[2];
        len = strlen(addr);
        if (addr[0] == '(' && addr[len-1] == ')') {
            addr[0] = 0;
            addr[len-1] = 0;
            addrs = g_strsplit(addr+1, ",", 0);
            list = NULL;
            /* So ... this api is just insane ... we set plain strings as the contact email if it
               is a normal contact, but need to do this xml crap for mailing lists */
            for (i=0;addrs[i];i++) {
                EDestination *d;
                EVCardAttribute *attr;

                d = e_destination_new();
                e_destination_set_email(d, addrs[i]);

                attr = e_vcard_attribute_new (NULL, EVC_EMAIL);
                e_destination_export_to_vcard_attribute (d, attr);
                list = g_list_append(list, attr);
                g_object_unref(d);
            }
            e_contact_set_attributes(card, E_CONTACT_EMAIL, list);
            g_list_foreach(list, (GFunc)e_vcard_attribute_free, NULL);
            g_list_free(list);
            g_strfreev(addrs);
            e_contact_set(card, E_CONTACT_IS_LIST, GINT_TO_POINTER(TRUE));
        } else {
            e_contact_set(card, E_CONTACT_EMAIL_1, strings[2]);
        }

        /*name = e_contact_name_from_string(strings[1]);*/

        if (strings[3] && strings[4])
            e_contact_set(card, E_CONTACT_NOTE, strings[4]);

        /* FIXME Error checking */
        e_book_add_contact(book, card, NULL);
        g_object_unref(card);
    }
    g_strfreev (strings);
}

static void
import_contacts(void)
{
    ESource *primary;
    ESourceList *source_list;
    EBook *book;
    gchar *name;
    GString *line;
    FILE *fp;
    size_t offset;

    printf("importing pine addressbook\n");

    if (!e_book_get_addressbooks(&source_list, NULL))
        return;

    name = g_build_filename(g_get_home_dir(), ".addressbook", NULL);
    fp = fopen(name, "r");
    g_free(name);
    if (fp == NULL)
        return;

    primary = e_source_list_peek_source_any(source_list);
    /* FIXME Better error handling */
    if ((book = e_book_new(primary,NULL)) == NULL) {
        fclose(fp);
        g_warning ("Could not create EBook.");
        return;
    }

    e_book_open(book, TRUE, NULL);
    g_object_unref(primary);
    g_object_unref(source_list);

    line = g_string_new("");
    g_string_set_size(line, 256);
    offset = 0;
    while (fgets(line->str+offset, 256, fp)) {
        size_t len;

        len = strlen(line->str+offset)+offset;
        if (line->str[len-1] == '\n')
            g_string_truncate(line, len-1);
        else if (!feof(fp)) {
            offset = len;
            g_string_set_size(line, len+256);
            continue;
        } else {
            g_string_truncate(line, len);
        }

        import_contact(book, line->str);
        offset = 0;
    }

    g_string_free(line, TRUE);
    fclose(fp);
    g_object_unref(book);
}

static gchar *
pine_import_desc (struct _pine_import_msg *m)
{
    return g_strdup (_("Importing Pine data"));
}

static MailImporterSpecial pine_special_folders[] = {
    { "sent-mail", "Sent" }, /* pine */
    { "saved-messages", "Drafts" }, /* pine */
    { NULL },
};

static void
pine_import_exec(struct _pine_import_msg *m)
{
    if (GPOINTER_TO_INT(g_datalist_get_data(&m->target->data, "pine-do-addr")))
        import_contacts();

    if (GPOINTER_TO_INT(g_datalist_get_data(&m->target->data, "pine-do-mail"))) {
        gchar *path;

        path = g_build_filename(g_get_home_dir(), "mail", NULL);
        mail_importer_import_folders_sync(path, pine_special_folders, 0, m->status);
        g_free(path);
    }
}

static void
pine_import_done(struct _pine_import_msg *m)
{
    printf("importing complete\n");

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

        gconf = gconf_client_get_default();
        if (GPOINTER_TO_INT(g_datalist_get_data(&m->target->data, "pine-do-addr")))
            gconf_client_set_bool(gconf, "/apps/evolution/importer/pine/addr", TRUE, NULL);
        if (GPOINTER_TO_INT(g_datalist_get_data(&m->target->data, "pine-do-mail")))
            gconf_client_set_bool(gconf, "/apps/evolution/importer/pine/mail", TRUE, NULL);
        g_object_unref(gconf);
    }

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

static void
pine_import_free(struct _pine_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
pine_status(CamelOperation *op, const gchar *what, gint pc, gpointer data)
{
    struct _pine_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
pine_status_timeout(gpointer data)
{
    struct _pine_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 pine_import_info = {
    sizeof (struct _pine_import_msg),
    (MailMsgDescFunc) pine_import_desc,
    (MailMsgExecFunc) pine_import_exec,
    (MailMsgDoneFunc) pine_import_done,
    (MailMsgFreeFunc) pine_import_free
};

static int
mail_importer_pine_import(EImport *ei, EImportTarget *target)
{
    struct _pine_import_msg *m;
    gint id;

    m = mail_msg_new(&pine_import_info);
    g_datalist_set_data(&target->data, "pine-msg", m);
    m->import = ei;
    g_object_ref(m->import);
    m->target = target;
    m->status_timeout_id = g_timeout_add(100, pine_status_timeout, m);
    m->status_lock = g_mutex_new();
    m->status = camel_operation_new(pine_status, m);

    id = m->base.seq;

    mail_msg_fast_ordered_push (m);

    return id;
}

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

static void
checkbox_addr_toggle_cb(GtkToggleButton *tb, EImportTarget *target)
{
    g_datalist_set_data(&target->data, "pine-do-addr", GINT_TO_POINTER(gtk_toggle_button_get_active(tb)));
}

static GtkWidget *
pine_getwidget(EImport *ei, EImportTarget *target, EImportImporter *im)
{
    GtkWidget *box, *w;
    GConfClient *gconf;
    gboolean done_mail, done_addr;

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

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

    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_mail_toggle_cb), target);
    gtk_box_pack_start((GtkBox *)box, w, FALSE, FALSE, 0);

    w = gtk_check_button_new_with_label(_("Address Book"));
    gtk_toggle_button_set_active((GtkToggleButton *)w, !done_addr);
    g_signal_connect(w, "toggled", G_CALLBACK(checkbox_addr_toggle_cb), target);
    gtk_box_pack_start((GtkBox *)box, w, FALSE, FALSE, 0);

    gtk_widget_show_all(box);

    return box;
}

static void
pine_import(EImport *ei, EImportTarget *target, EImportImporter *im)
{
    if (GPOINTER_TO_INT(g_datalist_get_data(&target->data, "pine-do-mail"))
        || GPOINTER_TO_INT(g_datalist_get_data(&target->data, "pine-do-addr")))
        mail_importer_pine_import(ei, target);
    else
        e_import_complete(ei, target);
}

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

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

static EImportImporter pine_importer = {
    E_IMPORT_TARGET_HOME,
    0,
    pine_supported,
    pine_getwidget,
    pine_import,
    pine_cancel,
};

EImportImporter *
pine_importer_peek(void)
{
    pine_importer.name = _("Evolution Pine importer");
    pine_importer.description = _("Import mail from Pine.");

    return &pine_importer;
}