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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 <gtk/gtk.h>
#include <glib/gi18n.h>

#include "em-vfolder-context.h"
#include "em-vfolder-rule.h"
#include "mail/e-mail-store.h"
#include "mail/em-utils.h"
#include "mail/em-folder-tree.h"
#include "mail/em-folder-selector.h"

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

#define d(x)

static gint validate (EFilterRule *, EAlert **alert);
static gint vfolder_eq (EFilterRule *fr, EFilterRule *cm);
static xmlNodePtr xml_encode (EFilterRule *);
static gint xml_decode (EFilterRule *, xmlNodePtr, ERuleContext *f);
static void rule_copy (EFilterRule *dest, EFilterRule *src);
/*static void build_code(EFilterRule *, GString *out);*/
static GtkWidget *get_widget (EFilterRule *fr, ERuleContext *f);

static void em_vfolder_rule_class_init (EMVFolderRuleClass *klass);
static void em_vfolder_rule_init (EMVFolderRule *vr);
static void em_vfolder_rule_finalise (GObject *obj);

/* DO NOT internationalise these strings */
static const gchar *with_names[] = {
    "specific",
    "local_remote_active",
    "remote_active",
    "local"
};

static EFilterRuleClass *parent_class = NULL;

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

    if (!type) {
        static const GTypeInfo info = {
            sizeof (EMVFolderRuleClass),
            NULL, /* base_class_init */
            NULL, /* base_class_finalize */
            (GClassInitFunc)em_vfolder_rule_class_init,
            NULL, /* class_finalize */
            NULL, /* class_data */
            sizeof (EMVFolderRule),
            0,    /* n_preallocs */
            (GInstanceInitFunc)em_vfolder_rule_init,
        };

        type = g_type_register_static(E_TYPE_FILTER_RULE, "EMVFolderRule", &info, 0);
    }

    return type;
}

static void
em_vfolder_rule_class_init (EMVFolderRuleClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);
    EFilterRuleClass *fr_class =(EFilterRuleClass *)klass;

    parent_class = g_type_class_ref (E_TYPE_FILTER_RULE);

    object_class->finalize = em_vfolder_rule_finalise;

    /* override methods */
    fr_class->validate = validate;
    fr_class->eq = vfolder_eq;
    fr_class->xml_encode = xml_encode;
    fr_class->xml_decode = xml_decode;
    fr_class->copy = rule_copy;
    /*fr_class->build_code = build_code;*/
    fr_class->get_widget = get_widget;
}

static void
em_vfolder_rule_init (EMVFolderRule *vr)
{
    vr->with = EM_VFOLDER_RULE_WITH_SPECIFIC;
    vr->rule.source = g_strdup("incoming");
}

static void
em_vfolder_rule_finalise (GObject *obj)
{
    EMVFolderRule *vr =(EMVFolderRule *)obj;

    g_list_foreach (vr->sources, (GFunc)g_free, NULL);
    g_list_free (vr->sources);

        G_OBJECT_CLASS (parent_class)->finalize (obj);
}

/**
 * em_vfolder_rule_new:
 *
 * Create a new EMVFolderRule object.
 *
 * Return value: A new #EMVFolderRule object.
 **/
EMVFolderRule *
em_vfolder_rule_new (void)
{
    return (EMVFolderRule *)g_object_new (em_vfolder_rule_get_type (), NULL, NULL);
}

void
em_vfolder_rule_add_source (EMVFolderRule *vr, const gchar *uri)
{
    g_return_if_fail (EM_IS_VFOLDER_RULE (vr));
    g_return_if_fail (uri);

    vr->sources = g_list_append (vr->sources, g_strdup (uri));

    e_filter_rule_emit_changed ((EFilterRule *)vr);
}

const gchar *
em_vfolder_rule_find_source (EMVFolderRule *vr, const gchar *uri)
{
    GList *l;

    g_return_val_if_fail (EM_IS_VFOLDER_RULE (vr), NULL);

    /* only does a simple string or address comparison, should
       probably do a decoded url comparison */
    l = vr->sources;
    while (l) {
        if (l->data == uri || !strcmp (l->data, uri))
            return l->data;
        l = l->next;
    }

    return NULL;
}

void
em_vfolder_rule_remove_source (EMVFolderRule *vr, const gchar *uri)
{
    gchar *found;

    g_return_if_fail (EM_IS_VFOLDER_RULE (vr));

    found =(gchar *)em_vfolder_rule_find_source (vr, uri);
    if (found) {
        vr->sources = g_list_remove (vr->sources, found);
        g_free (found);
        e_filter_rule_emit_changed ((EFilterRule *)vr);
    }
}

const gchar *
em_vfolder_rule_next_source (EMVFolderRule *vr, const gchar *last)
{
    GList *node;

    if (last == NULL) {
        node = vr->sources;
    } else {
        node = g_list_find (vr->sources, (gchar *)last);
        if (node == NULL)
            node = vr->sources;
        else
            node = g_list_next (node);
    }

    if (node)
        return (const gchar *)node->data;

    return NULL;
}

static gint
validate (EFilterRule *fr, EAlert **alert)
{
    g_return_val_if_fail (fr != NULL, 0);
    g_warn_if_fail (alert == NULL || *alert == NULL);

    if (!fr->name || !*fr->name) {
        if (alert)
            *alert = e_alert_new ("mail:no-name-vfolder", NULL);
        return 0;
    }

    /* We have to have at least one source set in the "specific" case.
       Do not translate this string! */
    if (((EMVFolderRule *)fr)->with == EM_VFOLDER_RULE_WITH_SPECIFIC &&
        ((EMVFolderRule *)fr)->sources == NULL) {
        if (alert)
            *alert = e_alert_new ("mail:vfolder-no-source", NULL);
        return 0;
    }

    return E_FILTER_RULE_CLASS (parent_class)->validate (fr, alert);
}

static gint
list_eq (GList *al, GList *bl)
{
    gint truth = TRUE;

    while (truth && al && bl) {
        gchar *a = al->data, *b = bl->data;

        truth = strcmp (a, b)== 0;
        al = al->next;
        bl = bl->next;
    }

    return truth && al == NULL && bl == NULL;
}

static gint
vfolder_eq (EFilterRule *fr, EFilterRule *cm)
{
        return E_FILTER_RULE_CLASS (parent_class)->eq (fr, cm)
        && list_eq (((EMVFolderRule *)fr)->sources, ((EMVFolderRule *)cm)->sources);
}

static xmlNodePtr
xml_encode (EFilterRule *fr)
{
    EMVFolderRule *vr =(EMVFolderRule *)fr;
    xmlNodePtr node, set, work;
    GList *l;

        node = E_FILTER_RULE_CLASS (parent_class)->xml_encode (fr);
    g_return_val_if_fail (node != NULL, NULL);
    g_return_val_if_fail (vr->with < G_N_ELEMENTS (with_names), NULL);

    set = xmlNewNode(NULL, (const guchar *)"sources");
    xmlAddChild (node, set);
    xmlSetProp(set, (const guchar *)"with", (guchar *)with_names[vr->with]);
    l = vr->sources;
    while (l) {
        work = xmlNewNode(NULL, (const guchar *)"folder");
        xmlSetProp(work, (const guchar *)"uri", (guchar *)l->data);
        xmlAddChild (set, work);
        l = l->next;
    }

    return node;
}

static void
set_with (EMVFolderRule *vr, const gchar *name)
{
    gint i;

    for (i = 0; i < G_N_ELEMENTS (with_names); i++) {
        if (!strcmp (name, with_names[i])) {
            vr->with = i;
            return;
        }
    }

    vr->with = 0;
}

static gint
xml_decode (EFilterRule *fr, xmlNodePtr node, struct _ERuleContext *f)
{
    xmlNodePtr set, work;
    gint result;
    EMVFolderRule *vr =(EMVFolderRule *)fr;
    gchar *tmp;

        result = E_FILTER_RULE_CLASS (parent_class)->xml_decode (fr, node, f);
    if (result != 0)
        return result;

    /* handle old format file, vfolder source is in filterrule */
    if (strcmp(fr->source, "incoming")!= 0) {
        set_with (vr, fr->source);
        g_free (fr->source);
        fr->source = g_strdup("incoming");
    }

    set = node->children;
    while (set) {
        if (!strcmp((gchar *)set->name, "sources")) {
            tmp = (gchar *)xmlGetProp(set, (const guchar *)"with");
            if (tmp) {
                set_with (vr, tmp);
                xmlFree (tmp);
            }
            work = set->children;
            while (work) {
                if (!strcmp((gchar *)work->name, "folder")) {
                    tmp = (gchar *)xmlGetProp(work, (const guchar *)"uri");
                    if (tmp) {
                        vr->sources = g_list_append (vr->sources, g_strdup (tmp));
                        xmlFree (tmp);
                    }
                }
                work = work->next;
            }
        }
        set = set->next;
    }
    return 0;
}

static void
rule_copy (EFilterRule *dest, EFilterRule *src)
{
    EMVFolderRule *vdest, *vsrc;
    GList *node;

    vdest =(EMVFolderRule *)dest;
    vsrc =(EMVFolderRule *)src;

    if (vdest->sources) {
        g_list_foreach (vdest->sources, (GFunc)g_free, NULL);
        g_list_free (vdest->sources);
        vdest->sources = NULL;
    }

    node = vsrc->sources;
    while (node) {
        gchar *uri = node->data;

        vdest->sources = g_list_append (vdest->sources, g_strdup (uri));
        node = node->next;
    }

    vdest->with = vsrc->with;

    E_FILTER_RULE_CLASS (parent_class)->copy (dest, src);
}

enum {
    BUTTON_ADD,
    BUTTON_REMOVE,
    BUTTON_LAST
};

struct _source_data {
    ERuleContext *rc;
    EMVFolderRule *vr;
    const gchar *current;
    GtkListStore *model;
    GtkTreeView *list;
    GtkWidget *source_selector;
    GtkButton *buttons[BUTTON_LAST];
};

static void source_add (GtkWidget *widget, struct _source_data *data);
static void source_remove (GtkWidget *widget, struct _source_data *data);

static struct {
    const gchar *name;
    GCallback func;
} edit_buttons[] = {
    { "source_add",    G_CALLBACK(source_add)   },
    { "source_remove", G_CALLBACK(source_remove)},
};

static void
set_sensitive (struct _source_data *data)
{
    gtk_widget_set_sensitive (
        GTK_WIDGET (data->buttons[BUTTON_ADD]), TRUE);
    gtk_widget_set_sensitive (
        GTK_WIDGET (data->buttons[BUTTON_REMOVE]),
        data->current != NULL);
}

static void
select_source (GtkWidget *list, struct _source_data *data)
{
    GtkTreeViewColumn *column;
    GtkTreePath *path;
    GtkTreeIter iter;

    gtk_tree_view_get_cursor (data->list, &path, &column);
    gtk_tree_model_get_iter (GTK_TREE_MODEL (data->model), &iter, path);
    gtk_tree_path_free (path);

    gtk_tree_model_get (GTK_TREE_MODEL (data->model), &iter, 0, &data->current, -1);

    set_sensitive (data);
}

static void
select_source_with_changed (GtkWidget *widget, struct _source_data *data)
{
    em_vfolder_rule_with_t with = 0;
    GSList *group = NULL;
    gint i = 0;

    if (!gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (widget)))
        return;

    group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (widget));

    for (i=0; i< g_slist_length (group); i++) {
        if (g_slist_nth_data (group, with = i) == widget)
            break;
    }

    if (with > EM_VFOLDER_RULE_WITH_LOCAL )
        with = 0;

    gtk_widget_set_sensitive (data->source_selector, !with );

    data->vr->with = with;
}

/* attempt to make a 'nice' folder name out of the raw uri */
static gchar *format_source (const gchar *euri)
{
    CamelURL *url;
    GString *out;
    gchar *res, *uri;

    /* This should really probably base it on the account name? */
    uri = em_uri_to_camel (euri);
    url = camel_url_new (uri, NULL);

    /* bad uri */
    if (url == NULL)
        return uri;

    g_free (uri);

    out = g_string_new (url->protocol);
    g_string_append_c (out, ':');
    if (url->user && url->host) {
        g_string_append_printf(out, "%s@%s", url->user, url->host);
        if (url->port)
            g_string_append_printf(out, ":%d", url->port);
    }
    if (url->fragment)
        g_string_append (out, url->fragment);
    else if (url->path)
        g_string_append (out, url->path);

    res = out->str;
    g_string_free (out, FALSE);

    return res;
}

static void
vfr_folder_response (GtkWidget *dialog, gint button, struct _source_data *data)
{
    const gchar *uri = em_folder_selector_get_selected_uri ((EMFolderSelector *)dialog);

    if (button == GTK_RESPONSE_OK && uri != NULL) {
        gchar *urinice, *euri;
        GtkTreeSelection *selection;
        GtkTreeIter iter;

        euri = em_uri_from_camel (uri);

        data->vr->sources = g_list_append (data->vr->sources, euri);

        gtk_list_store_append (data->model, &iter);
        urinice = format_source (euri);
        gtk_list_store_set (data->model, &iter, 0, urinice, 1, euri, -1);
        g_free (urinice);
        selection = gtk_tree_view_get_selection (data->list);
        gtk_tree_selection_select_iter (selection, &iter);
        data->current = euri;

        set_sensitive (data);
    }

    gtk_widget_destroy (dialog);
}

static void
source_add (GtkWidget *widget, struct _source_data *data)
{
    EMFolderTree *emft;
    GtkWidget *dialog;
    gpointer parent;

    parent = gtk_widget_get_toplevel (widget);
    parent = gtk_widget_is_toplevel (parent) ? parent : NULL;

    emft =(EMFolderTree *) em_folder_tree_new ();
    emu_restore_folder_tree_state (emft);
    em_folder_tree_set_excluded (emft, EMFT_EXCLUDE_NOSELECT);

    dialog = em_folder_selector_new (
        parent, emft, EM_FOLDER_SELECTOR_CAN_CREATE,
        _("Add Folder"), NULL, _("_Add"));
    g_signal_connect(dialog, "response", G_CALLBACK(vfr_folder_response), data);
    gtk_widget_show (dialog);
}

static void
source_remove (GtkWidget *widget, struct _source_data *data)
{
    GtkTreeSelection *selection;
    const gchar *source;
    GtkTreePath *path;
    GtkTreeIter iter;
    gint index = 0;
    gint n;

    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (data->list));

    source = NULL;
    while ((source = em_vfolder_rule_next_source (data->vr, source))) {
        path = gtk_tree_path_new ();
        gtk_tree_path_append_index (path, index);

        if (gtk_tree_selection_path_is_selected (selection, path)) {
            gtk_tree_model_get_iter (GTK_TREE_MODEL (data->model), &iter, path);

            em_vfolder_rule_remove_source (data->vr, source);
            gtk_list_store_remove (data->model, &iter);
            gtk_tree_path_free (path);

            /* now select the next rule */
            n = gtk_tree_model_iter_n_children (GTK_TREE_MODEL (data->model), NULL);
            index = index >= n ? n - 1 : index;

            if (index >= 0) {
                path = gtk_tree_path_new ();
                gtk_tree_path_append_index (path, index);
                gtk_tree_model_get_iter (GTK_TREE_MODEL (data->model), &iter, path);
                gtk_tree_path_free (path);

                gtk_tree_selection_select_iter (selection, &iter);
                gtk_tree_model_get (GTK_TREE_MODEL (data->model), &iter, 0, &data->current, -1);
            } else {
                data->current = NULL;
            }

            break;
        }

        index++;
        gtk_tree_path_free (path);
    }

    set_sensitive (data);
}

static GtkWidget *
get_widget (EFilterRule *fr, ERuleContext *rc)
{
    EMVFolderRule *vr =(EMVFolderRule *)fr;
    GtkWidget *widget, *frame;
    struct _source_data *data;
    GtkRadioButton *rb;
    const gchar *source;
    GtkTreeIter iter;
    GtkBuilder *builder;
    GObject *object;
    gint i;

        widget = E_FILTER_RULE_CLASS (parent_class)->get_widget (fr, rc);

    data = g_malloc0 (sizeof (*data));
    data->rc = rc;
    data->vr = vr;

    builder = gtk_builder_new ();
    e_load_ui_builder_definition (builder, "mail-dialogs.ui");

        frame = e_builder_get_widget(builder, "vfolder_source_frame");

    g_object_set_data_full((GObject *)frame, "data", data, g_free);

    for (i = 0; i < BUTTON_LAST; i++) {
        data->buttons[i] =(GtkButton *)e_builder_get_widget (builder, edit_buttons[i].name);
        g_signal_connect(data->buttons[i], "clicked", edit_buttons[i].func, data);
    }

    object = gtk_builder_get_object (builder, "source_list");
    data->list = GTK_TREE_VIEW (object);
    object = gtk_builder_get_object (builder, "source_model");
    data->model = GTK_LIST_STORE (object);

    source = NULL;
    while ((source = em_vfolder_rule_next_source (vr, source))) {
        gchar *nice = format_source (source);

        gtk_list_store_append (data->model, &iter);
        gtk_list_store_set (data->model, &iter, 0, nice, 1, source, -1);
        g_free (nice);
    }

    g_signal_connect(data->list, "cursor-changed", G_CALLBACK(select_source), data);

    rb = (GtkRadioButton *)e_builder_get_widget (builder, "local_rb");
    g_signal_connect (
        rb, "toggled",
        G_CALLBACK (select_source_with_changed), data);

    rb = (GtkRadioButton *)e_builder_get_widget (builder, "remote_rb");
    g_signal_connect (
        rb, "toggled",
        G_CALLBACK (select_source_with_changed), data);

    rb = (GtkRadioButton *)e_builder_get_widget (builder, "local_and_remote_rb");
    g_signal_connect (
        rb, "toggled",
        G_CALLBACK (select_source_with_changed), data);

    rb = (GtkRadioButton *) e_builder_get_widget (builder, "specific_rb");
    g_signal_connect (
        rb, "toggled",
        G_CALLBACK (select_source_with_changed), data);

    data->source_selector = (GtkWidget *)
        e_builder_get_widget (builder, "source_selector");

    rb = g_slist_nth_data (gtk_radio_button_get_group (rb), vr->with);
    gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (rb), TRUE);
    g_signal_emit_by_name (rb, "toggled");

    set_sensitive (data);

    gtk_box_pack_start (GTK_BOX (widget), frame, TRUE, TRUE, 3);

    g_object_unref (builder);

    return widget;
}