path: root/plugins/calendar-weather/calendar-weather.c

/*
 * Authors: David Trowbridge <trowbrds@cs.colorado.edu>
 *
 * Copyright (C) 1999-2008 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.
 *
 */

#include <gtk/gtk.h>
#include <e-util/e-config.h>
#include <e-util/e-icon-factory.h>
#include <e-util/e-plugin-util.h>
#include <calendar/gui/e-cal-config.h>
#include <calendar/gui/e-cal-event.h>
#include <libedataserver/e-source.h>
#include <libedataserver/e-categories.h>
#include <glib/gi18n.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <string.h>

#define GWEATHER_I_KNOW_THIS_IS_UNSTABLE
#include <libgweather/weather.h>
#include <libgweather/gweather-xml.h>
#undef GWEATHER_I_KNOW_THIS_IS_UNSTABLE

GtkWidget *e_calendar_weather_location (EPlugin *epl, EConfigHookItemFactoryData *data);
GtkWidget *e_calendar_weather_refresh (EPlugin *epl, EConfigHookItemFactoryData *data);
GtkWidget *e_calendar_weather_units (EPlugin *epl, EConfigHookItemFactoryData *data);
gboolean   e_calendar_weather_check (EPlugin *epl, EConfigHookPageCheckData *data);
void       e_calendar_weather_migrate (EPlugin *epl, ECalEventTargetBackend *data);
gint        e_plugin_lib_enable (EPlugin *epl, gint enable);

#define WEATHER_BASE_URI "weather://"

gint
e_plugin_lib_enable (EPlugin *epl, gint enable)
{
    GList *l;
    const gchar *tmp;
    gint ii;

    static struct {
        const gchar *description;
        const gchar *icon_name;
    } categories[] = {
        { N_("Weather: Fog"),       "weather-fog" },
        { N_("Weather: Cloudy"),    "weather-few-clouds" },
        { N_("Weather: Cloudy Night"),  "weather-few-clouds-night" },
        { N_("Weather: Overcast"),  "weather-overcast" },
        { N_("Weather: Showers"),   "weather-showers" },
        { N_("Weather: Snow"),      "weather-snow" },
        { N_("Weather: Sunny"), "weather-clear" },
        { N_("Weather: Clear Night"),   "weather-clear-night" },
        { N_("Weather: Thunderstorms"), "weather-storm" },
        { NULL,             NULL }
    };

    tmp = _(categories[0].description);

    /* Add the categories icons if we don't have them. */
    for (l = e_categories_get_list (); l; l = g_list_next (l)) {
        if (!strcmp ((const gchar *)l->data, tmp))
            goto exit;
    }

    for (ii = 0; categories[ii].description; ii++) {
        gchar *filename;

        filename = e_icon_factory_get_icon_filename (
            categories[ii].icon_name, GTK_ICON_SIZE_MENU);
        e_categories_add (
            _(categories[ii].description), NULL, filename, FALSE);
        g_free (filename);
    }

exit:
    return 0;
}

void
e_calendar_weather_migrate (EPlugin *epl, ECalEventTargetBackend *data)
{
    /* Perform a migration step here. This allows us to keep the weather calendar completely
     * separate from evolution. If the plugin isn't built, the weather source group won't
     * show up in the user's evolution. If it is, this will create it if it doesn't exist */
    ESourceGroup *group;
    GSList *groups;
    ESourceGroup *weather = NULL;

    groups = e_source_list_peek_groups (data->source_list);
    if (groups) {
        /* groups are already there, we need to search */
        GSList *g;

        for (g = groups; g; g = g_slist_next (g)) {
            group = E_SOURCE_GROUP (g->data);
            if (!weather && !strcmp (WEATHER_BASE_URI, e_source_group_peek_base_uri (group)))
                weather = g_object_ref (group);
        }
    }

    if (!weather) {
        group = e_source_group_new (_("Weather"), WEATHER_BASE_URI);
        e_source_list_add_group (data->source_list, group, -1);

        weather = group;
    }

    if (weather)
        g_object_unref (weather);

    e_source_list_sync (data->source_list, NULL);
}

static void
selection_changed (GtkTreeSelection *selection, GtkDialog *dialog)
{
    GtkTreeModel *model;
    GtkTreeIter iter;

    if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
        WeatherLocation *loc = NULL;
        gtk_tree_model_get (model, &iter, GWEATHER_XML_COL_POINTER, &loc, -1);
        gtk_dialog_set_response_sensitive (GTK_DIALOG (dialog), GTK_RESPONSE_OK, loc != NULL);
    } else {
        gtk_dialog_set_response_sensitive (GTK_DIALOG (dialog), GTK_RESPONSE_OK, FALSE);
    }
}

static struct
{
    gboolean is_old;
    gchar **ids;
    GtkTreeIter *result;
} find_data;

static gboolean
find_location_func (GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *node, gpointer data)
{
    WeatherLocation *wl = NULL;

    gtk_tree_model_get (model, node, GWEATHER_XML_COL_POINTER, &wl, -1);
    if (!wl || !wl->name || !wl->code)
        return FALSE;
    if (((!strcmp (wl->code, find_data.ids[0])) || (find_data.is_old && !strcmp (wl->code + 1, find_data.ids[0]))) &&
         (!strcmp (wl->name, find_data.ids[1]))) {
        find_data.result = gtk_tree_iter_copy (node);
        return TRUE;
    }
    return FALSE;
}

static GtkTreeIter *
find_location (GtkTreeModel *model, gchar *relative_url)
{
    /* old URL uses type/code/name, but new uses only code/name */
    if (strncmp (relative_url, "ccf/", 4) == 0) {
        relative_url = relative_url + 4;
        find_data.is_old = TRUE;
    } else
        find_data.is_old = FALSE;

    find_data.ids = g_strsplit (relative_url, "/", -1);
    find_data.result = NULL;
    gtk_tree_model_foreach (model, (GtkTreeModelForeachFunc) find_location_func, NULL);

    g_strfreev (find_data.ids);
    return find_data.result;
}

static gboolean
treeview_clicked (GtkTreeView *treeview, GdkEventButton *event, GtkDialog *dialog)
{
    if (event->type == GDK_2BUTTON_PRESS) {
        GtkTreeSelection *selection = gtk_tree_view_get_selection (treeview);
        GtkTreeModel *model;
        GtkTreeIter iter;

        if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
            WeatherLocation *wl = NULL;
            gtk_tree_model_get (model, &iter, GWEATHER_XML_COL_POINTER, &wl, -1);
            if (wl != NULL && wl->code != NULL && wl->name != NULL) {
                gtk_dialog_response (dialog, GTK_RESPONSE_OK);
                return TRUE;
            }
        }
    }
    return FALSE;
}

static GtkTreeModel *store = NULL;

static GtkDialog *
create_source_selector (ESource *source)
{
    GtkWidget *dialog, *treeview, *scrolledwindow;
    GtkWidget *content_area;
    GtkCellRenderer *text;
    GtkTreeSelection *selection;
    gchar *uri_text;
    SoupURI *suri;

    /* FIXME - should show an error here if it fails*/
    if (store == NULL)
        return NULL;

    dialog = gtk_dialog_new_with_buttons (
        _("Select a location"),
        NULL, GTK_DIALOG_MODAL,
        GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
        GTK_STOCK_OK, GTK_RESPONSE_OK,
        NULL);
    gtk_container_set_border_width (GTK_CONTAINER (dialog), 6);

    scrolledwindow = gtk_scrolled_window_new (NULL, NULL);
    gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolledwindow), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
    gtk_widget_show (scrolledwindow);
    treeview = gtk_tree_view_new_with_model (store);
    gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (treeview), FALSE);
    gtk_widget_show (treeview);
    gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW (scrolledwindow), treeview);
    gtk_widget_add_events (treeview, GDK_BUTTON_PRESS);
    g_signal_connect (G_OBJECT (treeview), "button-press-event", G_CALLBACK (treeview_clicked), dialog);
    selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (treeview));
    gtk_tree_selection_set_mode (selection, GTK_SELECTION_BROWSE);

    uri_text = e_source_get_uri (source);
    suri = soup_uri_new (uri_text);
    if (suri && suri->path && *suri->path) {
        GtkTreeIter *iter = find_location (store, uri_text + 10);
        GtkTreePath *path = gtk_tree_model_get_path (GTK_TREE_MODEL (store), iter);
        gtk_tree_view_expand_to_path (GTK_TREE_VIEW (treeview), path);
        gtk_tree_selection_select_path (selection, path);
        gtk_tree_path_free (path);
    }
    g_free (uri_text);
    if (suri)
        soup_uri_free (suri);

    g_signal_connect (G_OBJECT (selection), "changed", G_CALLBACK (selection_changed), dialog);
    g_object_set_data (G_OBJECT (dialog), "treeview", treeview);

    text = gtk_cell_renderer_text_new ();
    gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (treeview), -1, "location", text, "text", 0, NULL);

    content_area = gtk_dialog_get_content_area (GTK_DIALOG (dialog));
    gtk_container_add (GTK_CONTAINER (content_area), scrolledwindow);
    gtk_container_set_border_width (GTK_CONTAINER (scrolledwindow), 6);
    gtk_box_set_spacing (GTK_BOX (content_area), 6);

    gtk_dialog_set_response_sensitive (GTK_DIALOG (dialog), GTK_RESPONSE_OK, FALSE);
    gtk_window_set_default_size (GTK_WINDOW (dialog), 420, 340);

    return GTK_DIALOG (dialog);
}

static gchar *
build_location_path (GtkTreeIter *iter)
{
    GtkTreeIter parent;
    gchar *path, *temp1, *temp2;

    gtk_tree_model_get (GTK_TREE_MODEL (store), iter, GWEATHER_XML_COL_LOC, &temp1, -1);
    path = g_strdup (temp1);

    while (gtk_tree_model_iter_parent (GTK_TREE_MODEL (store), &parent, iter)) {
        gtk_tree_model_get (GTK_TREE_MODEL (store), &parent, GWEATHER_XML_COL_LOC, &temp1, -1);
        temp2 = g_strdup_printf ("%s : %s", temp1, path);
        g_free (path);
        path = temp2;
        iter = gtk_tree_iter_copy (&parent);
    }
    return path;
}

static void
location_clicked (GtkButton *button, ESource *source)
{
    GtkDialog *dialog = create_source_selector (source);
    gint response;

    if (dialog == NULL)
        return;

    response = gtk_dialog_run (dialog);

    if (response == GTK_RESPONSE_OK) {
        GtkTreeView *view = GTK_TREE_VIEW (g_object_get_data (G_OBJECT (dialog), "treeview"));
        GtkTreeSelection *selection = gtk_tree_view_get_selection (view);
        GtkTreeModel *model;
        GtkTreeIter iter;
        GtkWidget *label;
        WeatherLocation *wl = NULL;
        gchar *path, *uri;

        gtk_tree_selection_get_selected (selection, &model, &iter);
        gtk_tree_model_get (model, &iter, GWEATHER_XML_COL_POINTER, &wl, -1);
        path = build_location_path (&iter);

        label = gtk_bin_get_child (GTK_BIN (button));
        gtk_label_set_text (GTK_LABEL (label), path);

        uri = g_strdup_printf ("%s/%s", wl->code, wl->name);
        /* FIXME - url_encode (&uri); */
        e_source_set_relative_uri (source, uri);
        g_free (uri);
    } else {
        GtkWidget *label;
        const gchar *text;

        label = GTK_WIDGET (gtk_bin_get_child (GTK_BIN (button)));
        text = gtk_label_get_text (GTK_LABEL (label));
        /* Translators: "None" location for a weather calendar */
        if (strcmp ((const gchar *)text, C_("weather-cal-location", "None")) == 0)
            e_source_set_relative_uri (source, "");
    }

    gtk_widget_destroy (GTK_WIDGET (dialog));
}

GtkWidget *
e_calendar_weather_location (EPlugin *epl, EConfigHookItemFactoryData *data)
{
    GtkWidget *button, *parent, *text, *label;
    guint row;
    ECalConfigTargetSource *t = (ECalConfigTargetSource *) data->target;
    ESource *source = t->source;
    SoupURI *suri;
    gchar *uri_text;

    if (!e_plugin_util_is_source_proto (t->source, "weather"))
        return NULL;

    if (store == NULL)
        store = gweather_xml_load_locations ();

    uri_text = e_source_get_uri (t->source);
    suri = soup_uri_new (uri_text);

    parent = data->parent;

    g_object_get (parent, "n-rows", &row, NULL);

    label = gtk_label_new_with_mnemonic (_("_Location:"));
    gtk_widget_show (label);
    gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
    gtk_table_attach (GTK_TABLE (parent), label, 0, 1, row, row+1, GTK_FILL, 0, 0, 0);

    button = gtk_button_new ();
    g_signal_connect (G_OBJECT (button), "clicked", G_CALLBACK (location_clicked), source);
    gtk_widget_show (button);

    if (suri && suri->path && *suri->path) {
        GtkTreeIter *iter = find_location (store, uri_text + 10);
        gchar *location = build_location_path (iter);
        text = gtk_label_new (location);
        g_free (location);
    } else {
        text = gtk_label_new (C_("weather-cal-location", "None"));
    }
    gtk_widget_show (text);
    gtk_label_set_ellipsize (GTK_LABEL (text), PANGO_ELLIPSIZE_START);
    gtk_container_add (GTK_CONTAINER (button), text);
    if (suri)
        soup_uri_free (suri);
    g_free (uri_text);

    gtk_table_attach (GTK_TABLE (parent), button, 1, 2, row, row+1, GTK_EXPAND | GTK_FILL, 0, 0, 0);

    return button;
}

GtkWidget *
e_calendar_weather_refresh (EPlugin *epl, EConfigHookItemFactoryData *data)
{
    ECalConfigTargetSource *t = (ECalConfigTargetSource *) data->target;

    if (!e_plugin_util_is_source_proto (t->source, "weather"))
        return NULL;

    return e_plugin_util_add_refresh (data->parent, _("Re_fresh:"), t->source, "refresh");
}

static void
set_units (ESource *source, GtkWidget *combobox)
{
    const gchar *format = e_source_get_property (source, "units");
    if (format == NULL) {
        format = e_source_get_property (source, "temperature");
        if (format == NULL) {
            e_source_set_property (source, "units", "metric");
            gtk_combo_box_set_active (GTK_COMBO_BOX (combobox), 0);
        } else if (strcmp ((const gchar *)format, "fahrenheit") == 0) {
            /* old format, convert */
            e_source_set_property (source, "units", "imperial");
            gtk_combo_box_set_active (GTK_COMBO_BOX (combobox), 1);
        } else {
            e_source_set_property (source, "units", "metric");
            gtk_combo_box_set_active (GTK_COMBO_BOX (combobox), 0);
        }
    } else {
        if (strcmp ((const gchar *)format, "metric") == 0)
            gtk_combo_box_set_active (GTK_COMBO_BOX (combobox), 0);
        else
            gtk_combo_box_set_active (GTK_COMBO_BOX (combobox), 1);
    }
}

static void
units_changed (GtkComboBox *combobox, ECalConfigTargetSource *t)
{
    gint choice = gtk_combo_box_get_active (GTK_COMBO_BOX (combobox));
    if (choice == 0)
        e_source_set_property (t->source, "units", "metric");
    else
        e_source_set_property (t->source, "units", "imperial");
}

GtkWidget *
e_calendar_weather_units (EPlugin *epl, EConfigHookItemFactoryData *data)
{
    GtkWidget *combobox, *parent, *label;
    guint row;
    ECalConfigTargetSource *t = (ECalConfigTargetSource *) data->target;
    ESource *source = t->source;

    if (!e_plugin_util_is_source_proto (t->source, "weather"))
        return NULL;

    parent = data->parent;

    g_object_get (parent, "n-rows", &row, NULL);

    label = gtk_label_new_with_mnemonic (_("_Units:"));
    gtk_widget_show (label);
    gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
    gtk_table_attach (GTK_TABLE (parent), label, 0, 1, row, row+1, GTK_FILL, 0, 0, 0);

    combobox = gtk_combo_box_new_text ();
    gtk_widget_show (combobox);
    gtk_combo_box_append_text (GTK_COMBO_BOX (combobox), _("Metric (Celsius, cm, etc)"));
    gtk_combo_box_append_text (GTK_COMBO_BOX (combobox), _("Imperial (Fahrenheit, inches, etc)"));
    set_units (source, combobox);
    gtk_label_set_mnemonic_widget (GTK_LABEL (label), combobox);
    g_signal_connect (G_OBJECT (combobox), "changed", G_CALLBACK (units_changed), t);
    gtk_table_attach (GTK_TABLE (parent), combobox, 1, 2, row, row+1, GTK_FILL, 0, 0, 0);

    return combobox;
}

gboolean
e_calendar_weather_check (EPlugin *epl, EConfigHookPageCheckData *data)
{
    /* FIXME - check pageid */
    ECalConfigTargetSource *t = (ECalConfigTargetSource *) data->target;
    SoupURI *suri;
    gboolean ok = FALSE;

    /* always return TRUE if this isn't a weather source */
    if (!e_plugin_util_is_group_proto (e_source_peek_group (t->source), "weather"))
        return TRUE;

    suri = soup_uri_new (e_source_get_uri (t->source));
    /* make sure that the protocol is weather:// and that the path isn't empty */
    ok = suri && suri->path && *suri->path;
    if (suri)
        soup_uri_free (suri);

    return ok;
}