path: root/calendar/gui/itip-utils.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Authors:
 *  JP Rosevear <jpr@ximian.com>
 *
 * Copyright 2001, Ximian, Inc.
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */

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

#include <bonobo/bonobo-exception.h>
#include <bonobo/bonobo-object.h>
#include <bonobo/bonobo-object-client.h>
#include <bonobo/bonobo-moniker-util.h>
#include <bonobo-conf/bonobo-config-database.h>
#include <libgnome/gnome-defs.h>
#include <libgnome/gnome-i18n.h>
#include <libgnomeui/gnome-dialog.h>
#include <libgnomeui/gnome-dialog-util.h>
#include <gtk/gtkwidget.h>
#include <gal/util/e-util.h>
#include <e-util/e-unicode-i18n.h>
#include <ical.h>
#include <Evolution-Composer.h>
#include <e-util/e-time-utils.h>
#include <cal-util/timeutil.h>
#include <cal-util/cal-util.h>
#include "calendar-config.h"
#include "itip-utils.h"

#define GNOME_EVOLUTION_COMPOSER_OAFIID "OAFIID:GNOME_Evolution_Mail_Composer"

static gchar *itip_methods[] = {
    "PUBLISH",
    "REQUEST",
    "REPLY",
    "ADD",
    "CANCEL",
    "RERESH",
    "COUNTER",
    "DECLINECOUNTER"
};

static icalproperty_method itip_methods_enum[] = {
    ICAL_METHOD_PUBLISH,
    ICAL_METHOD_REQUEST,
    ICAL_METHOD_REPLY,
    ICAL_METHOD_ADD,
    ICAL_METHOD_CANCEL,
    ICAL_METHOD_REFRESH,
    ICAL_METHOD_COUNTER,
    ICAL_METHOD_DECLINECOUNTER,
};

static void
error_dialog (gchar *str) 
{
    GtkWidget *dlg;
    
    dlg = gnome_error_dialog (str);
    gnome_dialog_run_and_close (GNOME_DIALOG (dlg));
}

GList *
itip_addresses_get (void)
{
    static Bonobo_ConfigDatabase db = NULL;
    CORBA_Environment ev;
    GList *addresses = NULL;
    glong len, def, i;

    if (db == NULL) {
        CORBA_exception_init (&ev);
 
        db = bonobo_get_object ("wombat:", 
                    "Bonobo/ConfigDatabase", 
                    &ev);
    
        if (BONOBO_EX (&ev) || db == CORBA_OBJECT_NIL) {
            CORBA_exception_free (&ev);
            return NULL;
        }
        
        CORBA_exception_free (&ev);
    }
    
    len = bonobo_config_get_long_with_default (db, "/Mail/Accounts/num", 0, NULL);
    def = bonobo_config_get_long_with_default (db, "/Mail/Accounts/default_account", 0, NULL);

    for (i = 0; i < len; i++) {
        ItipAddress *a;
        gchar *path;
        
        a = g_new0 (ItipAddress, 1);

        /* get the identity info */
        path = g_strdup_printf ("/Mail/Accounts/identity_name_%ld", i);
        a->name = bonobo_config_get_string (db, path, NULL);
        g_free (path);

        path = g_strdup_printf ("/Mail/Accounts/identity_address_%ld", i);
        a->address = bonobo_config_get_string (db, path, NULL);
        g_free (path);

        if (i == def)
            a->default_address = TRUE;

        a->full = g_strdup_printf ("%s <%s>", a->name, a->address);
        addresses = g_list_append (addresses, a);
    }

    return addresses;
}

void
itip_addresses_free (GList *addresses)
{
    GList *l;
    
    for (l = addresses; l != NULL; l = l->next) {
        ItipAddress *a = l->data;

        g_free (a->name);
        g_free (a->address);
        g_free (a->full);
        g_free (a);
    }
    g_list_free (addresses);
}

const gchar *
itip_strip_mailto (const gchar *address) 
{
    const gchar *text;
    
    if (address == NULL)
        return NULL;
    
    text = e_strstrcase (address, "mailto:");
    if (text != NULL && strlen (address) > 7)
        address += 7;

    return address;
}

static char *
get_label (struct icaltimetype *tt)
{
    char buffer[1000];
    struct tm tmp_tm = { 0 };
    
    tmp_tm.tm_year = tt->year - 1900;
    tmp_tm.tm_mon = tt->month - 1;
    tmp_tm.tm_mday = tt->day;
    tmp_tm.tm_hour = tt->hour;
    tmp_tm.tm_min = tt->minute;
    tmp_tm.tm_sec = tt->second;
    tmp_tm.tm_isdst = -1;

    tmp_tm.tm_wday = time_day_of_week (tt->day, tt->month - 1, tt->year);

    e_time_format_date_and_time (&tmp_tm,
                     calendar_config_get_24_hour_format (), 
                     FALSE, FALSE,
                     buffer, 1000);
    
    return g_strdup (buffer);
}

typedef struct {
    GHashTable *tzids;
    icalcomponent *icomp;   
} ItipUtilTZData;

static void
foreach_tzid_callback (icalparameter *param, gpointer data)
{
    ItipUtilTZData *tz_data = data; 
    const char *tzid;
    icaltimezone *zone;
    icalcomponent *vtimezone_comp;

    /* Get the TZID string from the parameter. */
    tzid = icalparameter_get_tzid (param);
    if (!tzid || g_hash_table_lookup (tz_data->tzids, tzid))
        return;

    /* Check if it is a builtin timezone. If it isn't, return. */
    zone = icaltimezone_get_builtin_timezone_from_tzid (tzid);
    if (!zone)
        return;

    /* Convert it to a string and add it to the hash. */
    vtimezone_comp = icaltimezone_get_component (zone);
    if (!vtimezone_comp)
        return;

    icalcomponent_add_component (tz_data->icomp, icalcomponent_new_clone (vtimezone_comp));
    g_hash_table_insert (tz_data->tzids, (char *)tzid, (char *)tzid);   
}

static GNOME_Evolution_Composer_RecipientList *
comp_to_list (CalComponentItipMethod method, CalComponent *comp)
{
    GNOME_Evolution_Composer_RecipientList *to_list;
    GNOME_Evolution_Composer_Recipient *recipient;
    CalComponentOrganizer organizer;
    GSList *attendees, *l;
    gint cntr, len;

    switch (method) {
    case CAL_COMPONENT_METHOD_REQUEST:
    case CAL_COMPONENT_METHOD_CANCEL:
        cal_component_get_attendee_list (comp, &attendees);
        len = g_slist_length (attendees);
        
        to_list = GNOME_Evolution_Composer_RecipientList__alloc ();
        to_list->_maximum = len;
        to_list->_length = len;
        to_list->_buffer = CORBA_sequence_GNOME_Evolution_Composer_Recipient_allocbuf (len);
        
        for (cntr = 0, l = attendees; cntr < len; cntr++, l = l->next) {
            CalComponentAttendee *att = l->data;
            
            recipient = &(to_list->_buffer[cntr]);
            if (att->cn)
                recipient->name = CORBA_string_dup (att->cn);
            else
                recipient->name = CORBA_string_dup ("");
            recipient->address = CORBA_string_dup (itip_strip_mailto (att->value));
        }
        break;

    case CAL_COMPONENT_METHOD_REPLY:
    case CAL_COMPONENT_METHOD_ADD:
    case CAL_COMPONENT_METHOD_REFRESH:
    case CAL_COMPONENT_METHOD_COUNTER:
    case CAL_COMPONENT_METHOD_DECLINECOUNTER:
        cal_component_get_organizer (comp, &organizer);
        if (organizer.value == NULL) {
            error_dialog (_("An organizer must be set."));
            return NULL;
        }
        
        len = 1;

        to_list = GNOME_Evolution_Composer_RecipientList__alloc ();
        to_list->_maximum = len;
        to_list->_length = len;
        to_list->_buffer = CORBA_sequence_GNOME_Evolution_Composer_Recipient_allocbuf (len);
        recipient = &(to_list->_buffer[0]);

        if (organizer.cn != NULL)
            recipient->name = CORBA_string_dup (organizer.cn);
        else
            recipient->name = CORBA_string_dup ("");
        recipient->address = CORBA_string_dup (itip_strip_mailto (organizer.value));
        break;

    default:
        to_list = GNOME_Evolution_Composer_RecipientList__alloc ();
        to_list->_maximum = to_list->_length = 0;
        break;
    }
    CORBA_sequence_set_release (to_list, TRUE);

    return to_list; 
}
    
static CORBA_char *
comp_subject (CalComponent *comp) 
{
    CalComponentText caltext;

    cal_component_get_summary (comp, &caltext);
    if (caltext.value != NULL)  
        return CORBA_string_dup (caltext.value);

    switch (cal_component_get_vtype (comp)) {
    case CAL_COMPONENT_EVENT:
        return CORBA_string_dup ("Event information");
    case CAL_COMPONENT_TODO:
        return CORBA_string_dup ("Task information");
    case CAL_COMPONENT_JOURNAL:
        return CORBA_string_dup ("Journal information");
    case CAL_COMPONENT_FREEBUSY:
        return CORBA_string_dup ("Free/Busy information");
    default:
        return CORBA_string_dup ("Calendar information");
    }       
}

static CORBA_char *
comp_content_type (CalComponentItipMethod method)
{
    char tmp[256];  

    sprintf (tmp, "text/calendar;METHOD=%s", itip_methods[method]);
    return CORBA_string_dup (tmp);

}

static CORBA_char *
comp_filename (CalComponent *comp)
{
    switch (cal_component_get_vtype (comp)) {
    case CAL_COMPONENT_FREEBUSY:
        return CORBA_string_dup ("freebusy.ifb");
    default:
        return CORBA_string_dup ("calendar.ics");
    }   
}

static CORBA_char *
comp_description (CalComponent *comp)
{
    CORBA_char *description;    
    CalComponentDateTime dt;
    char *start = NULL, *end = NULL;

    switch (cal_component_get_vtype (comp)) {
    case CAL_COMPONENT_EVENT:
        return CORBA_string_dup ("Event information");
    case CAL_COMPONENT_TODO:
        return CORBA_string_dup ("Task information");
    case CAL_COMPONENT_JOURNAL:
        return CORBA_string_dup ("Journal information");
    case CAL_COMPONENT_FREEBUSY:
        cal_component_get_dtstart (comp, &dt);
        if (dt.value) {
            start = get_label (dt.value);
            cal_component_get_dtend (comp, &dt);
            if (dt.value)
                end = get_label (dt.value);
        }
        if (start != NULL && end != NULL) {
            char *tmp = g_strdup_printf ("Free/Busy information (%s to %s)", start, end);
            description = CORBA_string_dup (tmp);
            g_free (tmp);           
        } else {
            description = CORBA_string_dup ("Free/Busy information");
        }
        g_free (start);
        g_free (end);
        return description;     
    default:
        return CORBA_string_dup ("iCalendar information");
    }
}

static char *
comp_string (CalComponentItipMethod method, CalComponent *comp)
{
    CalComponent *clone;        
    icalcomponent *icomp, *iclone;
    icalproperty *prop;
    icalvalue *value;
    gchar *ical_string;
    ItipUtilTZData tz_data;
        
    icomp = cal_util_new_top_level ();

    prop = icalproperty_new (ICAL_METHOD_PROPERTY);
    value = icalvalue_new_method (itip_methods_enum[method]);
    icalproperty_set_value (prop, value);
    icalcomponent_add_property (icomp, prop);

    /* Strip off attributes barred from appearing */
    clone = cal_component_clone (comp);
    switch (method) {
    case CAL_COMPONENT_METHOD_PUBLISH:
        cal_component_set_attendee_list (clone, NULL);
        break;          
    case CAL_COMPONENT_METHOD_REPLY:
    case CAL_COMPONENT_METHOD_CANCEL:
    case CAL_COMPONENT_METHOD_REFRESH:
    case CAL_COMPONENT_METHOD_DECLINECOUNTER:
        cal_component_remove_all_alarms (clone);
        break;
    default:
    }

    iclone = cal_component_get_icalcomponent (clone);
        
    /* Add the timezones */
    tz_data.tzids = g_hash_table_new (g_str_hash, g_str_equal);
    tz_data.icomp = icomp;      
    icalcomponent_foreach_tzid (iclone, foreach_tzid_callback, &tz_data);
    g_hash_table_destroy (tz_data.tzids);

    icalcomponent_add_component (icomp, iclone);
    ical_string = icalcomponent_as_ical_string (icomp);
    icalcomponent_remove_component (icomp, iclone);
    
    icalcomponent_free (icomp);
    gtk_object_unref (GTK_OBJECT (clone));  
    
    return ical_string; 
}

void
itip_send_comp (CalComponentItipMethod method, CalComponent *comp)
{
    BonoboObjectClient *bonobo_server;
    GNOME_Evolution_Composer composer_server;
    GNOME_Evolution_Composer_RecipientList *to_list = NULL;
    GNOME_Evolution_Composer_RecipientList *cc_list = NULL;
    GNOME_Evolution_Composer_RecipientList *bcc_list = NULL;
    CORBA_char *subject = NULL, *content_type = NULL;
    CORBA_char *filename = NULL, *description = NULL;
    GNOME_Evolution_Composer_AttachmentData *attach_data = NULL;
    CORBA_boolean show_inline;
    char *ical_string;
    CORBA_Environment ev;
    
    CORBA_exception_init (&ev);

    /* Obtain an object reference for the Composer. */
    bonobo_server = bonobo_object_activate (GNOME_EVOLUTION_COMPOSER_OAFIID, 0);
    g_return_if_fail (bonobo_server != NULL);
    composer_server = BONOBO_OBJREF (bonobo_server);

    to_list = comp_to_list (method, comp);
    if (to_list == NULL)
        goto cleanup;
    
    cc_list = GNOME_Evolution_Composer_RecipientList__alloc ();
    cc_list->_maximum = cc_list->_length = 0;
    bcc_list = GNOME_Evolution_Composer_RecipientList__alloc ();
    bcc_list->_maximum = bcc_list->_length = 0;
    
    /* Subject information */
    subject = comp_subject (comp);
    
    /* Set recipients, subject */
    GNOME_Evolution_Composer_setHeaders (composer_server, to_list, cc_list, bcc_list, subject, &ev);
    if (BONOBO_EX (&ev)) {      
        g_warning ("Unable to set composer headers while sending iTip message");
        goto cleanup;
    }

    /* Content type, suggested file name, description */
    content_type = comp_content_type (method);
    filename = comp_filename (comp);    
    description = comp_description (comp);  
    show_inline = TRUE;

    ical_string = comp_string (method, comp);   
    attach_data = GNOME_Evolution_Composer_AttachmentData__alloc ();
    attach_data->_length = strlen (ical_string);
    attach_data->_maximum = attach_data->_length;   
    attach_data->_buffer = CORBA_sequence_CORBA_char_allocbuf (attach_data->_length);   
    strcpy (attach_data->_buffer, ical_string);

    GNOME_Evolution_Composer_attachData (composer_server, 
                    content_type, filename, description,
                    show_inline, attach_data,
                    &ev);
    
    if (BONOBO_EX (&ev)) {
        g_warning ("Unable to attach data to the composer while sending iTip message");
        goto cleanup;
    }
    
    if (method == CAL_COMPONENT_METHOD_PUBLISH) {
        GNOME_Evolution_Composer_show (composer_server, &ev);
        if (BONOBO_EX (&ev))
            g_warning ("Unable to show the composer while sending iTip message");
    } else {        
        GNOME_Evolution_Composer_send (composer_server, &ev);
        if (BONOBO_EX (&ev))
            g_warning ("Unable to send iTip message");
    }
    
 cleanup:
    CORBA_exception_free (&ev);

    if (to_list != NULL)
        CORBA_free (to_list);
    if (cc_list != NULL)
        CORBA_free (cc_list);
    if (bcc_list != NULL)
        CORBA_free (bcc_list);

    if (subject != NULL)
        CORBA_free (subject);
    if (content_type != NULL)
        CORBA_free (content_type);
    if (filename != NULL)
        CORBA_free (filename);
    if (description != NULL)
        CORBA_free (description);
    if (attach_data != NULL)
        CORBA_free (attach_data);
}