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/*
 * e-mail-junk-hook.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/>
 *
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include "e-mail-junk-hook.h"

#include <glib/gi18n.h>
#include <camel/camel-junk-plugin.h>

#include "e-util/e-alert.h"
#include "shell/e-shell.h"

#include "mail/em-junk.h"
#include "mail/em-utils.h"
#include "mail/mail-session.h"

#define E_MAIL_JUNK_HOOK_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_MAIL_JUNK_HOOK, EMailJunkHookPrivate))

struct _EMailJunkHookPrivate {
    EMJunkInterface interface;
};

struct ErrorData {
    const gchar *error_message;
    GError *error;
};

static gpointer parent_class;
static GType mail_junk_hook_type;

static gboolean
mail_junk_hook_idle_cb (struct ErrorData *data)
{
    GtkWidget *widget;

    widget = e_alert_new_dialog_for_args (e_shell_get_active_window (NULL),
        data->error_message, data->error->message, NULL);
    em_utils_show_error_silent (widget);

    g_error_free (data->error);
    g_slice_free (struct ErrorData, data);

    return FALSE;
}

static void
mail_junk_hook_error (const gchar *error_message,
                      GError *error)
{
    struct ErrorData *data;

    g_return_if_fail (error != NULL);

    data = g_slice_new (struct ErrorData);
    data->error_message = error_message;
    data->error = error;

    g_idle_add ((GSourceFunc) mail_junk_hook_idle_cb, data);
}

static const gchar *
mail_junk_hook_get_name (CamelJunkPlugin *junk_plugin)
{
    EMJunkInterface *interface;

    interface = (EMJunkInterface *) junk_plugin;

    if (!interface->hook->plugin->enabled)
        return _("None");

    return interface->hook->plugin->name;
}

static void
mail_junk_hook_plugin_init (CamelJunkPlugin *junk_plugin)
{
    EMJunkInterface *interface;
    EPluginClass *class;

    interface = (EMJunkInterface *) junk_plugin;

    class = E_PLUGIN_GET_CLASS (interface->hook->plugin);
    g_return_if_fail (class->enable != NULL);

    class->enable (interface->hook->plugin, 1);
}

static gboolean
mail_junk_hook_check_junk (CamelJunkPlugin *junk_plugin,
                           CamelMimeMessage *mime_message)
{
    EMJunkTarget target = { mime_message, NULL };
    EMJunkInterface *interface;
    gpointer result;

    interface = (EMJunkInterface *) junk_plugin;

    if (!interface->hook->plugin->enabled)
        return FALSE;

    result = e_plugin_invoke (
        interface->hook->plugin,
        interface->check_junk, &target);

    if (target.error != NULL)
        mail_junk_hook_error ("mail:junk-check-error", target.error);

    return (result != NULL);
}

static void
mail_junk_hook_report_junk (CamelJunkPlugin *junk_plugin,
                            CamelMimeMessage *mime_message)
{
    EMJunkTarget target = { mime_message, NULL };
    EMJunkInterface *interface;

    interface = (EMJunkInterface *) junk_plugin;

    if (!interface->hook->plugin->enabled)
        return;

    e_plugin_invoke (
        interface->hook->plugin,
        interface->report_junk, &target);

    if (target.error != NULL)
        mail_junk_hook_error ("mail:junk-report-error", target.error);
}

static void
mail_junk_hook_report_notjunk (CamelJunkPlugin *junk_plugin,
                               CamelMimeMessage *mime_message)
{
    EMJunkTarget target = { mime_message, NULL };
    EMJunkInterface *interface;

    interface = (EMJunkInterface *) junk_plugin;

    if (!interface->hook->plugin->enabled)
        return;

    e_plugin_invoke (
        interface->hook->plugin,
        interface->report_notjunk, &target);

    if (target.error != NULL)
        mail_junk_hook_error (
            "mail:junk-not-report-error", target.error);
}

static void
mail_junk_hook_commit_reports (CamelJunkPlugin *junk_plugin)
{
    EMJunkInterface *interface;

    interface = (EMJunkInterface *) junk_plugin;

    if (!interface->hook->plugin->enabled)
        return;

    e_plugin_invoke (
        interface->hook->plugin,
        interface->commit_reports, NULL);
}

static void
mail_junk_hook_finalize (GObject *object)
{
    EMailJunkHookPrivate *priv;

    priv = E_MAIL_JUNK_HOOK_GET_PRIVATE (object);

    g_free (priv->interface.check_junk);
    g_free (priv->interface.report_junk);
    g_free (priv->interface.report_notjunk);
    g_free (priv->interface.commit_reports);
    g_free (priv->interface.validate_binary);
    g_free (priv->interface.plugin_name);

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

static gint
mail_junk_hook_construct (EPluginHook *hook,
                          EPlugin *plugin,
                          xmlNodePtr node)
{
    EMailJunkHookPrivate *priv;
    gchar *property;

    priv = E_MAIL_JUNK_HOOK_GET_PRIVATE (hook);

    /* Chain up to parent's construct() method. */
    if (E_PLUGIN_HOOK_CLASS (parent_class)->construct (hook, plugin, node) == -1)
        return -1;

    if (!plugin->enabled)
        return -1;

    node = xmlFirstElementChild (node);

    if (node == NULL)
        return -1;

    if (g_strcmp0 ((gchar *) node->name, "interface") != 0)
        return -1;

    property = e_plugin_xml_prop (node, "check_junk");
    priv->interface.check_junk = property;

    property = e_plugin_xml_prop (node, "report_junk");
    priv->interface.report_junk = property;

    property = e_plugin_xml_prop (node, "report_non_junk");
    priv->interface.report_notjunk = property;

    property = e_plugin_xml_prop (node, "commit_reports");
    priv->interface.commit_reports = property;

    property = e_plugin_xml_prop (node, "validate_binary");
    priv->interface.validate_binary = property;

    property = e_plugin_xml_prop (node, "name");
    priv->interface.plugin_name = property;

    if (priv->interface.check_junk == NULL)
        return -1;

    if (priv->interface.report_junk == NULL)
        return -1;

    if (priv->interface.report_notjunk == NULL)
        return -1;

    if (priv->interface.commit_reports == NULL)
        return -1;

    mail_session_add_junk_plugin (
        priv->interface.plugin_name, &priv->interface.camel);

    return 0;
}

static void
mail_junk_hook_class_init (EMailJunkHookClass *class)
{
    GObjectClass *object_class;
    EPluginHookClass *plugin_hook_class;

    parent_class = g_type_class_peek_parent (class);
    g_type_class_add_private (class, sizeof (EMailJunkHookPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->finalize = mail_junk_hook_finalize;

    plugin_hook_class = E_PLUGIN_HOOK_CLASS (class);
    plugin_hook_class->construct = mail_junk_hook_construct;
    plugin_hook_class->id = "org.gnome.evolution.mail.junk:1.0";
}

static void
mail_junk_hook_init (EMailJunkHook *mail_junk_hook)
{
    EMJunkInterface *interface;

    mail_junk_hook->priv = E_MAIL_JUNK_HOOK_GET_PRIVATE (mail_junk_hook);

    interface = &mail_junk_hook->priv->interface;
    interface->camel.get_name = mail_junk_hook_get_name;
    interface->camel.api_version = 1;
    interface->camel.check_junk = mail_junk_hook_check_junk;
    interface->camel.report_junk = mail_junk_hook_report_junk;
    interface->camel.report_notjunk = mail_junk_hook_report_notjunk;
    interface->camel.commit_reports = mail_junk_hook_commit_reports;
    interface->camel.init = mail_junk_hook_plugin_init;
    interface->hook = E_PLUGIN_HOOK (mail_junk_hook);
}

GType
e_mail_junk_hook_get_type (void)
{
    return mail_junk_hook_type;
}

void
e_mail_junk_hook_register_type (GTypeModule *type_module)
{
    const GTypeInfo type_info = {
        sizeof (EMailJunkHookClass),
        (GBaseInitFunc) NULL,
        (GBaseFinalizeFunc) NULL,
        (GClassInitFunc) mail_junk_hook_class_init,
        (GClassFinalizeFunc) NULL,
        NULL,  /* class_data */
        sizeof (EMailJunkHook),
        0,     /* n_preallocs */
        (GInstanceInitFunc) mail_junk_hook_init,
        NULL   /* value_table */
    };

    mail_junk_hook_type = g_type_module_register_type (
        type_module, E_TYPE_PLUGIN_HOOK,
        "EMailJunkHook", &type_info, 0);
}