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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Authors: Vivek Jain <jvivek@novell.com>
 *
 *  Copyright 2005 Novell, Inc. (www.novell.com)
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

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

#include <string.h>
#include <stdlib.h>
#include <glib.h>
#include "em-junk-hook.h"
#include "mail-session.h"
#include <e-util/e-icon-factory.h>
#include "e-util/e-error.h"
#include "em-utils.h"
#include <camel/camel-junk-plugin.h>
#include <glib/gi18n.h>

static GHashTable *emjh_types;
static GObjectClass *parent_class = NULL;

static void *emjh_parent_class;
static GObjectClass *emj_parent;
#define emjh ((EMJunkHook *)eph)

#define d(x)

static const EPluginHookTargetKey emjh_flag_map[] = {
    { NULL }
};

/* ********************************************************************** */

/* Mail junk plugin */

/*
  <hook class="org.gnome.evolution.mail.junk:1.0">
  <group id="EMJunk">
     <item check_junk="sa_check_junk"
           report_junk="sa_report_junk"
       report_non_junk="sa_report_non_junk"
       commit_reports = "sa_commit_reports"/>
  </group>
  </hook>

*/

static void manage_error (const char *msg, GError *error);

GQuark
em_junk_error_quark (void)
{
    return g_quark_from_static_string ("em-junk-error-quark");
}

static const char *
em_junk_get_name (CamelJunkPlugin *csp);

static void
em_junk_init(CamelJunkPlugin *csp)
{
    struct _EMJunkHookItem *item = (EMJunkHookItem *)csp;

    ((EPluginClass *)G_OBJECT_GET_CLASS(item->hook->hook.plugin))->enable(item->hook->hook.plugin, 1);
}

static const char *
em_junk_get_name (CamelJunkPlugin *csp)
{
    struct _EMJunkHookItem *item = (EMJunkHookItem *)csp;

    if (item->hook && item->hook->hook.plugin->enabled) {
        return (item->hook->hook.plugin->name);
    } else
        return  _("None");

}

static gboolean
em_junk_check_junk(CamelJunkPlugin *csp, CamelMimeMessage *m)
{
    struct _EMJunkHookItem *item = (EMJunkHookItem *)csp;

    if (item->hook && item->hook->hook.plugin->enabled) {
        gboolean res;
        EMJunkHookTarget target = {
            m,
            NULL
        };

        res = e_plugin_invoke(item->hook->hook.plugin, item->check_junk, &target) != NULL;

        manage_error ("mail:junk-check-error", target.error);

        return res;
    }

    return FALSE;
}

static void
em_junk_report_junk(CamelJunkPlugin *csp, CamelMimeMessage *m)
{
    struct _EMJunkHookItem *item = (EMJunkHookItem *)csp;

    if (item->hook && item->hook->hook.plugin->enabled) {
        EMJunkHookTarget target = {
            m,
            NULL
        };

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

        manage_error ("mail:junk-report-error", target.error);
    }
}

static void
em_junk_report_non_junk(CamelJunkPlugin *csp, CamelMimeMessage *m)
{
    struct _EMJunkHookItem *item = (EMJunkHookItem *)csp;

    if (item->hook && item->hook->hook.plugin->enabled) {
        EMJunkHookTarget target = {
            m,
            NULL
        };
        e_plugin_invoke(item->hook->hook.plugin, item->report_non_junk, &target);
        manage_error ("mail:junk-not-report-error", target.error);
    }
}

static void
em_junk_commit_reports(CamelJunkPlugin *csp)
{
    struct _EMJunkHookItem *item = (EMJunkHookItem *)csp;

    if (item->hook && item->hook->hook.plugin->enabled)
        e_plugin_invoke(item->hook->hook.plugin, item->commit_reports, NULL);

}

static void
emj_dispose (GObject *object)
{
    if (parent_class->dispose)
        parent_class->dispose (object);
}

static void
emj_finalize (GObject *object)
{
    if (parent_class->finalize)
        parent_class->finalize (object);
}

static void
emjh_free_item(EMJunkHookItem *item)
{
    g_free (item->check_junk);
    g_free (item->report_junk);
    g_free (item->report_non_junk);
    g_free (item->commit_reports);
    g_free(item);
}

static void
emjh_free_group(EMJunkHookGroup *group)
{
    g_slist_foreach(group->items, (GFunc)emjh_free_item, NULL);
    g_slist_free(group->items);

    g_free(group->id);
    g_free(group);
}

static struct _EMJunkHookItem *
emjh_construct_item(EPluginHook *eph, EMJunkHookGroup *group, xmlNodePtr root)
{
    struct _EMJunkHookItem *item;
    CamelJunkPlugin junk_plugin = {
        em_junk_get_name,
        1,
        em_junk_check_junk,
        em_junk_report_junk,
        em_junk_report_non_junk,
        em_junk_commit_reports,
        em_junk_init,
    };

    d(printf("  loading group item\n"));
    item = g_malloc0(sizeof(*item));
    item->csp =  junk_plugin;
    item->check_junk = e_plugin_xml_prop(root, "check_junk");
    item->report_junk = e_plugin_xml_prop(root, "report_junk");
    item->report_non_junk = e_plugin_xml_prop(root, "report_non_junk");
    item->commit_reports = e_plugin_xml_prop(root, "commit_reports");
    item->validate_binary = e_plugin_xml_prop(root, "validate_binary");

    item->plugin_name = e_plugin_xml_prop(root, "name");
    item->hook = emjh;

    if (item->check_junk == NULL || item->report_junk == NULL || item->report_non_junk == NULL || item->commit_reports == NULL)
        goto error;

    /* Add the plugin to the session plugin list*/
    mail_session_add_junk_plugin (item->plugin_name, CAMEL_JUNK_PLUGIN (&(item->csp)));

    return item;
error:
    printf ("ERROR");
    emjh_free_item (item);
    return NULL;
}

static struct _EMJunkHookGroup *
emjh_construct_group(EPluginHook *eph, xmlNodePtr root)
{
    struct _EMJunkHookGroup *group;
    xmlNodePtr node;

    d(printf(" loading group\n"));
    group = g_malloc0(sizeof(*group));

    group->id = e_plugin_xml_prop(root, "id");
    if (group->id == NULL)
        goto error;

    node = root->children;

    /* We'll processs only  the first item from xml file*/
    while (node) {
        if (0 == strcmp((char *)node->name, "item")) {
            struct _EMJunkHookItem *item;

            item = emjh_construct_item(eph, group, node);
            if (item)
                group->items = g_slist_append(group->items, item);
            break;
        }

        node = node->next;
    }

    return group;
error:
    emjh_free_group(group);

    return NULL;
}

static int
emjh_construct(EPluginHook *eph, EPlugin *ep, xmlNodePtr root)
{
    xmlNodePtr node;

    d(printf("loading junk hook\n"));

    if (((EPluginHookClass *)emjh_parent_class)->construct(eph, ep, root) == -1)
        return -1;

    if (!ep->enabled) {
        g_warning ("ignored this junk plugin: not enabled");
        return -1;
    }

    node = root->children;
    while (node) {
        if (strcmp((char *)node->name, "group") == 0) {
            struct _EMJunkHookGroup *group;

            group = emjh_construct_group(eph, node);
            if (group) {
                emjh->groups = g_slist_append(emjh->groups, group);
            }
        }
        node = node->next;
    }

    eph->plugin = ep;

    return 0;
}

static void
manage_error (const char *msg, GError *error)
{
    GtkWidget *w;

    if (!error)
        return;

    w = e_error_new (NULL, msg, error->message, NULL);
    em_utils_show_error_silent (w);

    g_error_free (error);
}

/*XXX: don't think we need here*/
static void
emjh_enable(EPluginHook *eph, int state)
{
    GSList *g;

    g = emjh->groups;
    if (emjh_types == NULL)
        return;

}

static void
emjh_finalise(GObject *o)
{
    EPluginHook *eph = (EPluginHook *)o;

    g_slist_foreach(emjh->groups, (GFunc)emjh_free_group, NULL);
    g_slist_free(emjh->groups);

    ((GObjectClass *)emjh_parent_class)->finalize(o);
}

static void
emjh_class_init(EPluginHookClass *klass)
{
    ((GObjectClass *)klass)->finalize = emjh_finalise;
    klass->construct = emjh_construct;
    klass->enable = emjh_enable;
    klass->id = "org.gnome.evolution.mail.junk:1.0";
}

GType
em_junk_hook_get_type(void)
{
    static GType type = 0;

    if (!type) {
        static const GTypeInfo info = {
            sizeof(EMJunkHookClass), NULL, NULL, (GClassInitFunc) emjh_class_init, NULL, NULL,
            sizeof(EMJunkHook), 0, (GInstanceInitFunc) NULL,
        };

        emjh_parent_class = g_type_class_ref(e_plugin_hook_get_type());
        type = g_type_register_static(e_plugin_hook_get_type(), "EMJunkHook", &info, 0);
    }

    return type;
}

static void
emj_class_init (EMJunkClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);
    parent_class = g_type_class_peek_parent (klass);
    object_class->dispose = emj_dispose;
    object_class->finalize = emj_finalize;
}

GType
emj_get_type(void)
{
    static GType type = 0;

    if (!type) {
        static const GTypeInfo info = {
            sizeof(EMJunkClass), NULL, NULL, (GClassInitFunc) emj_class_init, NULL, NULL,
            sizeof(EMJunk), 0, (GInstanceInitFunc) NULL,
        };

        emj_parent = g_type_class_ref(G_TYPE_OBJECT);
        type = g_type_register_static(G_TYPE_OBJECT, "EMJunk", &info, 0);
    }

    return type;
}

void
em_junk_hook_register_type(GType type)
{
    EMJunk *klass;

    if (emjh_types == NULL)
        emjh_types = g_hash_table_new(g_str_hash, g_str_equal);

    d(printf("registering junk plugin type '%s'\n", g_type_name(type)));

    klass = g_type_class_ref(type);
    g_hash_table_insert(emjh_types, (void *)g_type_name(type), klass);
}