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

#include "camel/camel-url.h"
#include "em-vfolder-context.h"
#include "em-vfolder-rule.h"
#include "mail/em-utils.h"
#include "mail/em-folder-tree.h"
#include "mail/em-folder-selector.h"
#include "mail/mail-component.h"
#include "e-util/e-error.h"
#include "e-util/e-util-private.h"

#define d(x)

static gint validate(FilterRule *);
static gint vfolder_eq(FilterRule *fr, FilterRule *cm);
static xmlNodePtr xml_encode(FilterRule *);
static gint xml_decode(FilterRule *, xmlNodePtr, RuleContext *f);
static void rule_copy(FilterRule *dest, FilterRule *src);
/*static void build_code(FilterRule *, GString *out);*/
static GtkWidget *get_widget(FilterRule *fr, RuleContext *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 FilterRuleClass *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(FILTER_TYPE_RULE, "EMVFolderRule", &info, 0);
    }

    return type;
}

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

    parent_class = g_type_class_ref(FILTER_TYPE_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));

    filter_rule_emit_changed((FilterRule *)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);
        filter_rule_emit_changed((FilterRule *)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(FilterRule *fr)
{
    g_return_val_if_fail(fr != NULL, 0);

    if (!fr->name || !*fr->name) {
        /* FIXME: set a parent window? */
        e_error_run(NULL, "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) {
        /* FIXME: set a parent window? */
        e_error_run(NULL, "mail:vfolder-no-source", NULL);
        return 0;
    }

    return FILTER_RULE_CLASS(parent_class)->validate(fr);
}

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(FilterRule *fr, FilterRule *cm)
{
        return FILTER_RULE_CLASS(parent_class)->eq(fr, cm)
        && list_eq(((EMVFolderRule *)fr)->sources, ((EMVFolderRule *)cm)->sources);
}

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

        node = FILTER_RULE_CLASS(parent_class)->xml_encode(fr);
    g_return_val_if_fail (node != NULL, NULL);
    g_return_val_if_fail (vr->with < sizeof(with_names)/sizeof(with_names[0]), 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<sizeof(with_names)/sizeof(with_names[0]);i++) {
        if (!strcmp(name, with_names[i])) {
            vr->with = i;
            return;
        }
    }

    vr->with = 0;
}

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

        result = 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(FilterRule *dest, FilterRule *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;

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

enum {
    BUTTON_ADD,
    BUTTON_REMOVE,
    BUTTON_LAST
};

struct _source_data {
    RuleContext *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((GtkWidget *)data->buttons[BUTTON_ADD], TRUE);
    gtk_widget_set_sensitive((GtkWidget *)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;

    emft =(EMFolderTree *)em_folder_tree_new_with_model(mail_component_peek_tree_model(mail_component_peek()));
    em_folder_tree_set_excluded(emft, EMFT_EXCLUDE_NOSELECT);

    dialog = em_folder_selector_new(emft, EM_FOLDER_SELECTOR_CAN_CREATE, _("Select Folder"), NULL, _("_Add"));
    gtk_window_set_transient_for((GtkWindow *)dialog, (GtkWindow *)gtk_widget_get_toplevel(widget));
    gtk_window_set_modal((GtkWindow *)dialog, TRUE);
    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);
}

GtkWidget *em_vfolder_editor_sourcelist_new(gchar *widget_name, gchar *string1, gchar *string2,
                      gint int1, gint int2);

GtkWidget *
em_vfolder_editor_sourcelist_new(gchar *widget_name, gchar *string1, gchar *string2, gint int1, gint int2)
{
    GtkWidget *table, *scrolled;
    GtkTreeSelection *selection;
    GtkCellRenderer *renderer;
    GtkListStore *model;

    scrolled = gtk_scrolled_window_new(NULL, NULL);
    gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(scrolled), GTK_SHADOW_IN);
    gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolled),
                    GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);

    model = gtk_list_store_new(2, G_TYPE_STRING, G_TYPE_POINTER);
    table = gtk_tree_view_new_with_model((GtkTreeModel *)model);
    gtk_tree_view_set_headers_visible((GtkTreeView *)table, FALSE);

    renderer = gtk_cell_renderer_text_new();
    gtk_tree_view_insert_column_with_attributes((GtkTreeView *)table, -1,
                             _("Search Folder source"), renderer,
                             "text", 0, NULL);

    selection = gtk_tree_view_get_selection((GtkTreeView *)table);
    gtk_tree_selection_set_mode(selection, GTK_SELECTION_SINGLE);

    gtk_container_add(GTK_CONTAINER(scrolled), table);

    g_object_set_data((GObject *)scrolled, "table", table);
    g_object_set_data((GObject *)scrolled, "model", model);

    gtk_widget_show(scrolled);
    gtk_widget_show(table);

    g_object_unref (model);

    return scrolled;
}

static GtkWidget *
get_widget(FilterRule *fr, RuleContext *rc)
{
    EMVFolderRule *vr =(EMVFolderRule *)fr;
    GtkWidget *widget, *frame, *list;
    struct _source_data *data;
    GtkRadioButton *rb;
    const gchar *source;
    GtkTreeIter iter;
    GladeXML *gui;
    gint i;
    gchar *gladefile;

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

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

    gladefile = g_build_filename (EVOLUTION_GLADEDIR,
                      "mail-dialogs.glade",
                      NULL);
    gui = glade_xml_new(gladefile, "vfolder_source_frame", NULL);
    g_free (gladefile);

        frame = glade_xml_get_widget(gui, "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 *)glade_xml_get_widget(gui, edit_buttons[i].name);
        g_signal_connect(data->buttons[i], "clicked", edit_buttons[i].func, data);
    }

    list = glade_xml_get_widget(gui, "source_list");
    data->list =(GtkTreeView *)g_object_get_data((GObject *)list, "table");
    data->model =(GtkListStore *)g_object_get_data((GObject *)list, "model");

    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 *)glade_xml_get_widget (gui, "local_rb");
    g_signal_connect (GTK_WIDGET(rb), "toggled", G_CALLBACK(select_source_with_changed), data);

    rb = (GtkRadioButton *)glade_xml_get_widget (gui, "remote_rb");
    g_signal_connect (GTK_WIDGET(rb), "toggled", G_CALLBACK(select_source_with_changed), data);

    rb = (GtkRadioButton *)glade_xml_get_widget (gui, "local_and_remote_rb");
    g_signal_connect (GTK_WIDGET(rb), "toggled", G_CALLBACK(select_source_with_changed), data);

    rb = (GtkRadioButton *)glade_xml_get_widget (gui, "specific_rb");
    g_signal_connect (GTK_WIDGET(rb), "toggled", G_CALLBACK(select_source_with_changed), data);

    data->source_selector = (GtkWidget *)glade_xml_get_widget (gui, "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);

    g_object_unref(gui);

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

    return widget;
}