path: root/my-evolution/e-summary-weather.c

/*
 * e-summary-weather.c
 *
 * Copyright (C) 2001  Ximian, Inc.
 *
 * Authors:  Iain Holmes  <iain@ximian.com>
 */

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

#include <glib.h>
#include <gtk/gtkctree.h>
#include <gtk/gtkmain.h>

#include <libgnome/gnome-defs.h>
#include <libgnome/gnome-i18n.h>
#include <libgnome/gnome-config.h>

#include <gal/widgets/e-unicode.h>

#include <libgnomevfs/gnome-vfs.h>
#include "e-summary.h"
#include "e-summary-weather.h"
#include "weather.h"
#include "metar.h"

struct _ESummaryWeather {
    ESummaryConnection *connection;
    GList *weathers;

    char *html;
    guint32 timeout;

    gboolean online;
    gboolean errorshown;
};

static GHashTable *locations_hash = NULL;

char *
e_summary_weather_get_html (ESummary *summary)
{
    GList *weathers;
    GString *string;
    char *html;
    char *s;

    if (summary->weather == NULL) {
        return NULL;
    }

    string = g_string_new ("<dl><img src=\"ico-weather.png\" align=\"middle\" "
                           "alt=\"\" width=\"48\" height=\"48\"><b>"
                           "<a href=\"http://www.metoffice.gov.uk\">");
    s = e_utf8_from_locale_string (_("My Weather"));
    g_string_append (string, s);
    g_free (s);
    g_string_append (string, "</a></b>");
    for (weathers = summary->weather->weathers; weathers; weathers = weathers->next) {
        if (((Weather *)weathers->data)->html == NULL) {
            continue;
        }

        g_string_append (string, ((Weather *)weathers->data)->html);
    }

    g_string_append (string, "</dl>");

    html = string->str;
    g_string_free (string, FALSE);

    return html;
}

static char *
make_url (const char *code)
{
    return g_strdup_printf ("http://weather.noaa.gov/cgi-bin/mgetmetar.pl?cccc=%s", code);
}

static char *
make_anchor (const char *name, const char *code)
{
    char *url, *anchor;

    url = make_url (code);
    anchor = g_strdup_printf ("<a href=\"%s\">%s</a>", url, name);
    g_free (url);

    return anchor;
}

static void
weather_make_html (Weather *w)
{
    GString *string;
    ESummaryWeatherLocation *location;
    char *sky, *temp, *cond, *url, *s;
    const char *icon_name;

    icon_name = icon_from_weather (w);
    string = g_string_new ("");
    g_string_sprintf (string, "<dd><img align=\"middle\" "
              "src=\"%s\">&#160;<b>", icon_name);
    location = g_hash_table_lookup (locations_hash, w->location);
    if (location == NULL) {
        url = make_anchor (w->location, w->location);
    } else {
        url = make_anchor (location->name, w->location);
    }

    g_string_append (string, url);
    g_free (url);

    g_string_append (string, "</b>:<blockquote><font size=\"-1\">");
    sky = (char *) weather_sky_string (w);
    temp = weather_temp_string (w);
    cond = (char *) weather_conditions_string (w);

    s = e_utf8_from_locale_string (sky);
    g_string_append (string, s);
    g_free (s);
    g_string_append_c (string, ' ');
    s = e_utf8_from_locale_string (cond);
    g_string_append (string, s);
    g_free (s);
    g_string_append_c (string, ' ');
    s = e_utf8_from_locale_string (temp);
    g_string_append (string, s);
    g_free (s);
    g_free (temp);

#if 0
    g_string_append (string, "<font size=\"-1\">");
    
    uri = g_strdup_printf ("<a href=\"weather://%p\">", w);
    g_string_append (string, uri);
    g_free (uri);
    g_string_append (string, "(More)</a></font></font></blockquote></dd>");
#else
    g_string_append (string, "</font></blockquote></dd>");
#endif
    if (w->html != NULL) {
        g_free (w->html);
    }
    w->html = string->str;
    g_string_free (string, FALSE);

    e_summary_draw (w->summary);
}

static ESummaryWeatherLocation *
weather_location_new (char **locdata)
{
    ESummaryWeatherLocation *location;

    location = g_new (ESummaryWeatherLocation, 1);
    location->name = g_strdup (locdata[0]);
    location->code = g_strdup (locdata[1]);
    location->zone = g_strdup (locdata[2]);
    location->radar = g_strdup (locdata[3]);

    return location;
}

static void
parse_metar_token (const char *token,
           gboolean in_comment,
           Weather *w)
{
    if (in_comment == FALSE) {
        if (metar_tok_time ((char *) token, w)) {
            return;
        } else if (metar_tok_wind ((char *) token, w)) {
            return;
        } else if (metar_tok_vis ((char *) token, w)) {
            return;
        } else if (metar_tok_cloud ((char *) token, w)) {
            return;
        } else if (metar_tok_temp ((char *) token, w)) {
            return;
        } else if (metar_tok_pres ((char *) token, w)) {
            return;
        } else if (metar_tok_cond ((char *) token, w)) {
            return;
        }
    }
}

static void
parse_metar (const char *metar,
         Weather *w)
{
    char *metar_dup;
    char **toks;
    gint ntoks;
    gint i;
    gboolean in_remark = FALSE;

    metar_dup = g_strdup (metar + 6);

    metar_init_re ();

    toks = g_strsplit (metar, " ", 0);

    for (ntoks = 0; toks[ntoks]; ntoks++) {
        if (strcmp (toks[ntoks], "RMK") == 0) {
            in_remark = TRUE;
        }
    }

    for (i = ntoks - 1; i >= 0; i--) {
        if (*toks[i] != '\0') {
            if (strcmp (toks[i], "RMK") == 0) {
                in_remark = FALSE;
            } else {
                parse_metar_token (toks[i], in_remark, w);
            }
        }
    }

    g_strfreev (toks);
    g_free (metar_dup);
    weather_make_html (w);
}

static void
close_callback (GnomeVFSAsyncHandle *handle,
        GnomeVFSResult result,
        Weather *w)
{
    ESummary *summary;
    char *html, *metar, *end;
    char *search_str;

    summary = w->summary;
    if (summary->weather->connection->callback) {
        ESummaryConnection *connection = summary->weather->connection;
        connection->callback (summary, connection->callback_closure);
    }

    if (w->handle == NULL) {
        g_free (w->buffer);
        w->buffer = NULL;
        g_string_free (w->string, TRUE);
        w->string = NULL;
        return;
    }

    w->handle = NULL;
    g_free (w->buffer);
    w->buffer = NULL;
    html = w->string->str;
    g_string_free (w->string, FALSE);
    w->string = NULL;

    /* Find the metar data */
    search_str = g_strdup_printf ("\n%s", w->location);
    metar = strstr (html, search_str);
    if (metar == NULL) {
        g_free (search_str);
        g_free (html);
        return;
    }

    metar++;
    end = strchr (metar, '\n');
    if (end == NULL) {
        g_free (search_str);
        g_free (html);
        return;
    }
    *end = '\0';

    parse_metar (metar, w);
    g_free (html);
    g_free (search_str);
    return;
}

static void
read_callback (GnomeVFSAsyncHandle *handle,
           GnomeVFSResult result,
           gpointer buffer,
           GnomeVFSFileSize bytes_requested,
           GnomeVFSFileSize bytes_read,
           Weather *w)
{
    if (result != GNOME_VFS_OK && result != GNOME_VFS_ERROR_EOF) {
        if (w->summary->weather->errorshown == FALSE) {
            w->html = g_strdup ("<dd><b>An error occurred while downloading weather data</b></dd>");
            w->summary->weather->errorshown = TRUE;
        } else {
            w->html = g_strdup ("<dd> </dd>");
        }

        e_summary_draw (w->summary);
        w->handle = NULL;
        gnome_vfs_async_close (handle, 
                       (GnomeVFSAsyncCloseCallback) close_callback, w);
        return;
    }

    if (bytes_read == 0) {
        gnome_vfs_async_close (handle,
                       (GnomeVFSAsyncCloseCallback) close_callback, w);
    } else {
        *((char *) buffer + bytes_read) = 0;
        g_string_append (w->string, (const char *) buffer);
        gnome_vfs_async_read (handle, buffer, 4095,
                      (GnomeVFSAsyncReadCallback) read_callback, w);
    }
}

static void
open_callback (GnomeVFSAsyncHandle *handle,
           GnomeVFSResult result,
           Weather *w)
{
    if (result != GNOME_VFS_OK) {
        if (w->summary->weather->errorshown == FALSE) {
            w->html = e_utf8_from_locale_string (_("<dd><b>The weather server could not be contacted</b></dd>"));

            w->summary->weather->errorshown = TRUE;
        } else {
            w->html = g_strdup ("<dd> </dd>");
        }

        e_summary_draw (w->summary);
        return;
    }

    w->string = g_string_new ("");
    w->buffer = g_new (char, 4096);

    gnome_vfs_async_read (handle, w->buffer, 4095,
                  (GnomeVFSAsyncReadCallback) read_callback, w);
}

static void
e_summary_weather_update (ESummary *summary)
{
    GList *w;

    summary->weather->errorshown = FALSE;
    for (w = summary->weather->weathers; w; w = w->next) {
        char *uri;
        Weather *weather = w->data;

        uri = g_strdup_printf ("http://weather.noaa.gov/cgi-bin/mgetmetar.pl?cccc=%s", weather->location);

        gnome_vfs_async_open (&weather->handle, uri, GNOME_VFS_OPEN_READ,
                      (GnomeVFSAsyncOpenCallback) open_callback, weather);
        g_free (uri);
    }
}

static void
weather_free (Weather *w)
{
    g_return_if_fail (w != NULL);

    if (w->handle != NULL) {
        gnome_vfs_async_cancel (w->handle);
    }
    if (w->string) {
        g_string_free (w->string, TRUE);
    }
    if (w->buffer) {
        g_free (w->buffer);
    }

    g_free (w->location);
    g_free (w->html);
    g_free (w);
}

static void
e_summary_weather_add_location (ESummary *summary,
                const char *location)
{
    Weather *w;

    w = g_new0 (Weather, 1);
    w->summary = summary;
    w->location = g_strdup (location);
    summary->weather->weathers = g_list_prepend (summary->weather->weathers, w);
}

static gboolean
e_summary_weather_init_locations (void) 
{
    char *key, *path;
    int nregions, iregions;
    char **regions;

    if (locations_hash != NULL) {
        return TRUE;
    }

    locations_hash = g_hash_table_new (g_str_hash, g_str_equal);
    path = g_strdup (EVOLUTION_DATADIR "/evolution/Locations");

    key = g_strdup_printf ("=%s=/", path);
    g_free (path);

    gnome_config_push_prefix (key);
    g_free (key);

    gnome_config_get_vector ("Main/regions", &nregions, &regions);
    for (iregions = nregions - 1; iregions >= 0; iregions--) {
        int nstates, istates;
        char **states;
        char *region_name;
        char *region_name_key;
        char *states_key;

        region_name_key = g_strconcat (regions[iregions], "/name", NULL);
        states_key = g_strconcat (regions[iregions], "/states", NULL);
        region_name = gnome_config_get_string (region_name_key);

        gnome_config_get_vector (states_key, &nstates, &states);

        for (istates = nstates - 1; istates >= 0; istates--) {
            void *iter;
            char *iter_key, *iter_val;
            char *state_path, *state_name_key, *state_name;

            state_path = g_strconcat (regions[iregions], "_", states[istates], "/", NULL);
            state_name_key = g_strconcat (state_path, "name", NULL);
            state_name = gnome_config_get_string (state_name_key);

            iter = gnome_config_init_iterator (state_path);

            while ((iter = gnome_config_iterator_next (iter, &iter_key, &iter_val)) != NULL) {
                if (strstr (iter_key, "loc") != NULL) {
                    char **locdata;
                    int nlocdata;
                    ESummaryWeatherLocation *location;

                    gnome_config_make_vector (iter_val,
                                  &nlocdata,
                                  &locdata);
                    g_return_val_if_fail (nlocdata == 4, FALSE);

                    location = weather_location_new (locdata);
                    g_hash_table_insert (locations_hash,
                                 g_strdup (locdata[1]),
                                 location);
                    
                    g_strfreev (locdata);
                }
                
                g_free (iter_key);
                g_free (iter_val);
            }
            
            g_free (state_name);
            g_free (state_path);
            g_free (state_name_key);
        }

        g_strfreev (states);
        g_free (region_name);
        g_free (region_name_key);
        g_free (states_key);
    }

    g_strfreev (regions);
    gnome_config_pop_prefix ();

    return TRUE;
}

static void
e_summary_weather_protocol (ESummary *summary,
                const char *uri,
                void *closure)
{

}

static int
e_summary_weather_count (ESummary *summary,
             void *data)
{
    ESummaryWeather *weather;
    GList *p;
    int count = 0;

    weather = summary->weather;
    for (p = weather->weathers; p; p = p->next) {
        Weather *w = p->data;

        if (w->handle != NULL) {
            count++;
        }
    }

    return count;
}

static ESummaryConnectionData *
make_connection (Weather *w)
{
    ESummaryConnectionData *data;

    data = g_new (ESummaryConnectionData, 1);
    data->hostname = make_url (w->location);
    data->type = g_strdup (_("Weather"));

    return data;
}

static GList *
e_summary_weather_add (ESummary *summary,
               void *data)
{
    ESummaryWeather *weather;
    GList *p, *connections = NULL;

    weather = summary->weather;
    for (p = weather->weathers; p; p = p->next) {
        Weather *w = p->data;

        if (w->handle != NULL) {
            ESummaryConnectionData *d;

            d = make_connection (w);
            connections = g_list_prepend (connections, d);
        }
    }

    return connections;
}

static void
e_summary_weather_set_online (ESummary *summary,
                  GNOME_Evolution_OfflineProgressListener listener,
                  gboolean online,
                  void *data)
{
    ESummaryWeather *weather;

    weather = summary->weather;
    if (weather->online == online) {
        return;
    }

    if (online == TRUE) {
        e_summary_weather_update (summary);
        weather->timeout = gtk_timeout_add (summary->preferences->weather_refresh_time * 1000,
                            (GtkFunction) e_summary_weather_update,
                            summary);
    } else {
        gtk_timeout_remove (weather->timeout);
        weather->timeout = 0;
    }

    weather->online = online;
}

void
e_summary_weather_init (ESummary *summary)
{
    ESummaryPrefs *prefs;
    ESummaryWeather *weather;
    ESummaryConnection *connection;
    int timeout;

    g_return_if_fail (summary != NULL);
    g_return_if_fail (IS_E_SUMMARY (summary));

    if (e_summary_weather_init_locations () == FALSE) {
        return;
    }

    prefs = summary->preferences;
    weather = g_new0 (ESummaryWeather, 1);
    weather->online = TRUE;
    summary->weather = weather;

    connection = g_new (ESummaryConnection, 1);
    connection->count = e_summary_weather_count;
    connection->add = e_summary_weather_add;
    connection->set_online = e_summary_weather_set_online;
    connection->closure = NULL;
    connection->callback = NULL;
    connection->callback_closure = NULL;

    weather->connection = connection;
    e_summary_add_online_connection (summary, connection);

    e_summary_add_protocol_listener (summary, "weather", e_summary_weather_protocol, weather);

    if (prefs == NULL) {
        /* translators: Put here a list of codes for locations you want to
           see in My Evolution by default. You can find the list of all
           stations and their codes in Evolution sources
           (evolution/my-evolution/Locations) */
        char *default_stations = _("KBOS:ZSAM:EGAA"), **stations_v, **p;

        stations_v = g_strsplit (default_stations, ":", 0);
        g_assert (stations_v != NULL);
        for (p = stations_v; *p != NULL; p++) {
            e_summary_weather_add_location (summary, *p);
        }
        g_strfreev (stations_v);
        timeout = 600;
    } else {
        GList *p;

        for (p = prefs->stations; p; p = p->next) {
            e_summary_weather_add_location (summary, p->data);
        }
        timeout = prefs->weather_refresh_time;
    }

    e_summary_weather_update (summary);
    
    weather->timeout = gtk_timeout_add (timeout * 1000, 
                        (GtkFunction) e_summary_weather_update,
                        summary);
    return;
}

const char *
e_summary_weather_code_to_name (const char *code)
{
    ESummaryWeatherLocation *location;

    if (locations_hash == NULL) {
        if (e_summary_weather_init_locations () == FALSE) {
            return code;
        }
    }

    location = g_hash_table_lookup (locations_hash, code);
    if (location == NULL) {
        return code;
    } else {
        return location->name;
    }
}

void
e_summary_weather_ctree_fill (GtkCTree *tree)
{
    GtkCTreeNode *region, *state, *location, *pref_loc_root;
    char *key, *path;
    int nregions, iregions;
    char **regions, *pp[1];

    path = g_strdup (EVOLUTION_DATADIR "/evolution/Locations");

    key = g_strdup_printf ("=%s=/", path);
    g_free (path);

    gnome_config_push_prefix (key);
    g_free (key);

    pp[0] = _("Regions");
    pref_loc_root = gtk_ctree_insert_node (tree, NULL, NULL, pp, 0,
                           NULL, NULL, NULL, NULL,
                           FALSE, TRUE);

    gnome_config_get_vector ("Main/regions", &nregions, &regions);
    region = NULL;
    for (iregions = nregions - 1; iregions >= 0; iregions--) {
        int nstates, istates;
        char **states;
        char *region_name;
        char *region_name_key;
        char *states_key;

        region_name_key = g_strconcat (regions[iregions], "/name", NULL);
        states_key = g_strconcat (regions[iregions], "/states", NULL);
        region_name = gnome_config_get_string (region_name_key);

        pp[0] = region_name;
        region = gtk_ctree_insert_node (tree, pref_loc_root,
                        region, pp, 0, NULL,
                        NULL, NULL, NULL, 
                        FALSE, FALSE);
                            
        gnome_config_get_vector (states_key, &nstates, &states);

        state = NULL;
        for (istates = nstates - 1; istates >= 0; istates--) {
            void *iter;
            char *iter_key, *iter_val;
            char *state_path, *state_name_key, *state_name;

            state_path = g_strconcat (regions[iregions], "_", states[istates], "/", NULL);
            state_name_key = g_strconcat (state_path, "name", NULL);
            state_name = gnome_config_get_string (state_name_key);

            pp[0] = state_name;
            state = gtk_ctree_insert_node (tree, region,
                               state, pp, 0,
                               NULL, NULL,
                               NULL, NULL,
                               FALSE, FALSE);

            location = NULL;
            iter = gnome_config_init_iterator (state_path);

            while ((iter = gnome_config_iterator_next (iter, &iter_key, &iter_val)) != NULL) {
                if (strstr (iter_key, "loc") != NULL) {
                    char **locdata;
                    int nlocdata;
                    ESummaryWeatherLocation *w_location;

                    gnome_config_make_vector (iter_val,
                                  &nlocdata,
                                  &locdata);
                    g_return_if_fail (nlocdata == 4);

                    pp[0] = locdata[0];
                    location = gtk_ctree_insert_node (tree, state, location, pp, 0,
                                      NULL, NULL, NULL, NULL, FALSE, TRUE);
                    w_location = g_hash_table_lookup (locations_hash, locdata[1]);
                    gtk_ctree_node_set_row_data (tree, location, w_location);
                    g_strfreev (locdata);
                }

                g_free (iter_key);
                g_free (iter_val);
            }

            g_free (state_name);
            g_free (state_path);
            g_free (state_name_key);
        }

        g_strfreev (states);
        g_free (region_name);
        g_free (region_name_key);
        g_free (states_key);
    }

    g_strfreev (regions);
    gnome_config_pop_prefix ();

    return;
}

void
e_summary_weather_reconfigure (ESummary *summary)
{
    ESummaryWeather *weather;
    GList *old, *p;

    g_return_if_fail (summary != NULL);
    g_return_if_fail (IS_E_SUMMARY (summary));

    weather = summary->weather;

    /* Stop timeout so it doesn't occur while we're changing stuff*/
    gtk_timeout_remove (weather->timeout);

    for (old = weather->weathers; old; old = old->next) {
        Weather *w;

        w = old->data;
        weather_free (w);
    }
    g_list_free (weather->weathers);
    weather->weathers = NULL;
    for (p = summary->preferences->stations; p; p = p->next) {
        e_summary_weather_add_location (summary, p->data);
    }

    weather->timeout = gtk_timeout_add (summary->preferences->weather_refresh_time * 1000, 
                        (GtkFunction) e_summary_weather_update, summary);
    e_summary_weather_update (summary);
}

void
e_summary_weather_free (ESummary *summary)
{
    ESummaryWeather *weather;
    GList *p;

    g_return_if_fail (summary != NULL);
    g_return_if_fail (IS_E_SUMMARY (summary));

    weather = summary->weather;

    if (weather->timeout != 0) {
        gtk_timeout_remove (weather->timeout);
    }
    for (p = weather->weathers; p; p = p->next) {
        Weather *w = p->data;

        weather_free (w);
    }
    g_list_free (weather->weathers);
    g_free (weather->html);

    e_summary_remove_online_connection (summary, weather->connection);
    g_free (weather->connection);

    g_free (weather);
    summary->weather = NULL;
}