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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:
 *      Not Zed <notzed@lostzed.mmc.com.au>
 *      Jeffrey Stedfast <fejj@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

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

#include <string.h>
#include <shell/e-shell.h>
#include "mail/em-utils.h"
#include "em-vfolder-editor-context.h"
#include "em-vfolder-editor-rule.h"
#include "filter/e-filter-option.h"
#include "filter/e-filter-int.h"

#include "em-filter-editor-folder-element.h"

#define EM_VFOLDER_EDITOR_CONTEXT_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), EM_TYPE_VFOLDER_EDITOR_CONTEXT, EMVFolderEditorContextPrivate))

struct _EMVFolderEditorContextPrivate {
    EMailSession *session;
};

enum {
    PROP_0,
    PROP_SESSION
};

G_DEFINE_TYPE (
    EMVFolderEditorContext,
    em_vfolder_editor_context,
    EM_TYPE_VFOLDER_CONTEXT)

static void
vfolder_editor_context_set_session (EMVFolderEditorContext *context,
                             EMailSession *session)
{
    if (session == NULL) {
        EShell *shell;
        EShellBackend *shell_backend;
        EMailBackend *backend;

        shell = e_shell_get_default ();
        shell_backend = e_shell_get_backend_by_name (shell, "mail");

        backend = E_MAIL_BACKEND (shell_backend);
        session = e_mail_backend_get_session (backend);
    }

    g_return_if_fail (E_IS_MAIL_SESSION (session));
    g_return_if_fail (context->priv->session == NULL);

    context->priv->session = g_object_ref (session);
}

static void
vfolder_editor_context_set_property (GObject *object,
                              guint property_id,
                              const GValue *value,
                              GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_SESSION:
            vfolder_editor_context_set_session (
                EM_VFOLDER_EDITOR_CONTEXT (object),
                g_value_get_object (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
vfolder_editor_context_get_property (GObject *object,
                              guint property_id,
                              GValue *value,
                              GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_SESSION:
            g_value_set_object (
                value,
                em_vfolder_editor_context_get_session (
                EM_VFOLDER_EDITOR_CONTEXT (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
vfolder_editor_context_dispose (GObject *object)
{
    EMVFolderEditorContextPrivate *priv;

    priv = EM_VFOLDER_EDITOR_CONTEXT_GET_PRIVATE (object);
    if (priv->session != NULL) {
        g_object_unref (priv->session);
        priv->session = NULL;
    }

    /* Chain up to parent's dispose() method. */
    G_OBJECT_CLASS (em_vfolder_editor_context_parent_class)->dispose (object);
}

static EFilterElement *
vfolder_editor_context_new_element (ERuleContext *context,
                             const gchar *type)
{
    EMVFolderEditorContextPrivate *priv;

    priv = EM_VFOLDER_EDITOR_CONTEXT_GET_PRIVATE (context);

    if (strcmp (type, "system-flag") == 0)
        return e_filter_option_new ();

    if (strcmp (type, "score") == 0)
        return e_filter_int_new_type("score", -3, 3);

    if (strcmp (type, "folder") == 0)
        return em_filter_editor_folder_element_new (priv->session);

    /* XXX Legacy type name.  Same as "folder" now. */
    if (strcmp (type, "folder-curi") == 0)
        return em_filter_editor_folder_element_new (priv->session);

    return E_RULE_CONTEXT_CLASS (em_vfolder_editor_context_parent_class)->
        new_element (context, type);
}

static void
em_vfolder_editor_context_class_init (EMVFolderEditorContextClass *class)
{
    GObjectClass *object_class;
    ERuleContextClass *rule_context_class;

    g_type_class_add_private (class, sizeof (EMVFolderEditorContextPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = vfolder_editor_context_set_property;
    object_class->get_property = vfolder_editor_context_get_property;
    object_class->dispose = vfolder_editor_context_dispose;

    rule_context_class = E_RULE_CONTEXT_CLASS (class);
    rule_context_class->new_element = vfolder_editor_context_new_element;

    g_object_class_install_property (
        object_class,
        PROP_SESSION,
        g_param_spec_object (
            "session",
            NULL,
            NULL,
            E_TYPE_MAIL_SESSION,
            G_PARAM_READWRITE |
            G_PARAM_CONSTRUCT_ONLY));
}

static void
em_vfolder_editor_context_init (EMVFolderEditorContext *context)
{
    context->priv = EM_VFOLDER_EDITOR_CONTEXT_GET_PRIVATE (context);

    e_rule_context_add_part_set (
        E_RULE_CONTEXT (context), "partset", E_TYPE_FILTER_PART,
        (ERuleContextPartFunc) e_rule_context_add_part,
        (ERuleContextNextPartFunc) e_rule_context_next_part);

    e_rule_context_add_rule_set (
        E_RULE_CONTEXT (context), "ruleset", EM_TYPE_VFOLDER_EDITOR_RULE,
        (ERuleContextRuleFunc) e_rule_context_add_rule,
        (ERuleContextNextRuleFunc) e_rule_context_next_rule);

    E_RULE_CONTEXT (context)->flags =
        E_RULE_CONTEXT_THREADING | E_RULE_CONTEXT_GROUPING;
}

EMVFolderEditorContext *
em_vfolder_editor_context_new (EMailSession *session)
{
    g_return_val_if_fail (E_IS_MAIL_SESSION (session), NULL);

    return g_object_new (
        EM_TYPE_VFOLDER_EDITOR_CONTEXT, "session", session, NULL);
}

EMailSession *
em_vfolder_editor_context_get_session (EMVFolderEditorContext *context)
{
    g_return_val_if_fail (EM_IS_VFOLDER_EDITOR_CONTEXT (context), NULL);

    return context->priv->session;
}