path: root/calendar/gui/e-itip-control.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * e-itip-control.c
 *
 * Authors:
 *    Jesse Pavel <jpavel@helixcode.com>
 *
 * Copyright 2000, Helix Code, Inc.
 */

#include <config.h>
#include <gnome.h>
#include <bonobo.h>
#include <glade/glade.h>
#include <icaltypes.h>
#include <ical.h>
#include <time.h>

#include "e-itip-control.h"
#include <cal-util/cal-component.h>
#include <cal-client/cal-client.h>


#define DEFAULT_WIDTH 450
#define DEFAULT_HEIGHT 350

extern gchar *evolution_dir;

typedef struct _EItipControlPrivate EItipControlPrivate;

struct _EItipControlPrivate {
    GladeXML *xml, *xml2;
    GtkWidget *main_frame;
    GtkWidget *organizer_entry, *dtstart_label, *dtend_label;
    GtkWidget *summary_entry, *description_box, *message_text;
    GtkWidget *address_entry;
    GtkWidget *add_button;
    GtkWidget *loading_window;
    GtkWidget *loading_progress;

    icalcomponent *main_comp, *comp;
    CalComponent *cal_comp;
    char *vcalendar;
    gchar *from_address, *my_address, *organizer;
};

enum E_ITIP_BONOBO_ARGS {
    FROM_ADDRESS_ARG_ID,
    MY_ADDRESS_ARG_ID
};

static icalparameter *
get_icalparam_by_type (icalproperty *prop, icalparameter_kind kind)
{
    icalparameter *param;

    for (param = icalproperty_get_first_parameter (prop, ICAL_ANY_PARAMETER);
         param != NULL && icalparameter_isa (param) != kind;
         param = icalproperty_get_next_parameter (prop, ICAL_ANY_PARAMETER) );

    return param;
}


/********
 * find_attendee() searches through the attendee properties of `comp'
 * and returns the one whose value is the same as `address' if such
 * a property exists. Otherwise, it will return NULL.
 ********/
static icalproperty *
find_attendee (icalcomponent *comp, char *address)
{
    icalproperty *prop;
    char *attendee, *text;
    icalvalue *value;
    
    for (prop = icalcomponent_get_first_property (comp, ICAL_ATTENDEE_PROPERTY);
         prop != NULL;
         prop = icalcomponent_get_next_property (comp, ICAL_ATTENDEE_PROPERTY))
    {
        value = icalproperty_get_value (prop);
        if (!value)
            continue;

        attendee = icalvalue_get_string (value);

        /* Here I strip off the "MAILTO:" if it is present. */
        text = strchr (attendee, ':');
        if (text != NULL)
            text++;
        else
            text = attendee;

        if (strcmp (text, address) == 0) {
            /* We have found the correct property. */
            break;
        }
    }
            
    return prop;
}

static void
itip_control_destroy_cb (GtkObject *object,
            gpointer data)
{
    EItipControlPrivate *priv = data;

    gtk_object_unref (GTK_OBJECT (priv->xml));
    gtk_object_unref (GTK_OBJECT (priv->xml2));

    if (priv->main_comp != NULL) {
        icalcomponent_free (priv->main_comp);
    }

    if (priv->cal_comp != NULL) {
        gtk_object_unref (GTK_OBJECT (priv->cal_comp));
    }

    if (priv->from_address != NULL)
        g_free (priv->from_address);
    
    if (priv->organizer != NULL)
        g_free (priv->organizer);

    if (priv->vcalendar != NULL)
        g_free (priv->vcalendar);

    g_free (priv);
}
    
static void
itip_control_size_request_cb (GtkWidget *widget, GtkRequisition *requisition)
{
    requisition->width = DEFAULT_WIDTH;
    requisition->height = DEFAULT_HEIGHT;
}

static void
cal_loaded_cb (GtkObject *object, CalClientGetStatus status, gpointer data)
{
    CalClient *client = CAL_CLIENT (object);
    EItipControlPrivate *priv = data;

    gtk_widget_hide (priv->loading_progress);

    if (status == CAL_CLIENT_GET_SUCCESS) {
        if (cal_client_update_object (client, priv->cal_comp) == FALSE) {
            GtkWidget *dialog;
    
            dialog = gnome_warning_dialog("I couldn't update your calendar file!\n");
            gnome_dialog_run (GNOME_DIALOG(dialog));
        }
        else {
            /* We have success. */
            GtkWidget *dialog;
    
            dialog = gnome_ok_dialog("Component successfully added.");
            gnome_dialog_run (GNOME_DIALOG(dialog));
        }
    }
    else {
        GtkWidget *dialog;

        dialog = gnome_ok_dialog("There was an error loading the calendar file.");
        gnome_dialog_run (GNOME_DIALOG(dialog));
    }

    gtk_object_unref (GTK_OBJECT (client));
    return;
}

static void
add_button_clicked_cb (GtkWidget *widget, gpointer data)
{
    EItipControlPrivate *priv = data;
    gchar cal_uri[255];
    CalClient *client;

    sprintf (cal_uri, "%s/local/Calendar/calendar.ics", evolution_dir);
    
    client = cal_client_new ();
    if (cal_client_load_calendar (client, cal_uri) == FALSE) {
        GtkWidget *dialog;

        dialog = gnome_warning_dialog("I couldn't open your calendar file!\n");
        gnome_dialog_run (GNOME_DIALOG(dialog));
        gtk_object_unref (GTK_OBJECT (client));
    
        return;
    }

    gtk_signal_connect (GTK_OBJECT (client), "cal_loaded",
                    GTK_SIGNAL_FUNC (cal_loaded_cb), priv);
    
    gtk_progress_bar_update (GTK_PROGRESS_BAR (priv->loading_progress), 0.5);
    gtk_widget_show (priv->loading_progress);

    return;
}


/*
 * Bonobo::PersistStream
 *
 * These two functions implement the Bonobo::PersistStream load and
 * save methods which allow data to be loaded into and out of the
 * BonoboObject.
 */

static char *
stream_read (Bonobo_Stream stream)
{
    Bonobo_Stream_iobuf *buffer;
    CORBA_Environment    ev;
    gchar *data = NULL;
    gint length = 0;

    CORBA_exception_init (&ev);
    do {
#define READ_CHUNK_SIZE 65536
        Bonobo_Stream_read (stream, READ_CHUNK_SIZE,
                    &buffer, &ev);

        if (ev._major != CORBA_NO_EXCEPTION) {
            CORBA_exception_free (&ev);
            return NULL;
        }

        if (buffer->_length <= 0)
            break;

        data = g_realloc (data,
                  length + buffer->_length);

        memcpy (data + length,
            buffer->_buffer, buffer->_length);

        length += buffer->_length;

        CORBA_free (buffer);
    } while (1);

    CORBA_free (buffer);
    CORBA_exception_free (&ev);

    if (data == NULL)
      data = g_strdup("");

    return data;
} /* stream_read */

/*
 * This function implements the Bonobo::PersistStream:load method.
 */
static void
pstream_load (BonoboPersistStream *ps, const Bonobo_Stream stream,
          Bonobo_Persist_ContentType type, void *data,
          CORBA_Environment *ev)
{
    EItipControlPrivate *priv = data;
    gint pos, length, length2;
    icalcomponent_kind comp_kind;
    char message[256];
    

    if (type && g_strcasecmp (type, "text/calendar") != 0 &&        
        g_strcasecmp (type, "text/x-calendar") != 0) {      
        CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                     ex_Bonobo_Persist_WrongDataType, NULL);
        return;
    }

    if ((priv->vcalendar = stream_read (stream)) == NULL) {
        CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                     ex_Bonobo_Persist_FileNotFound, NULL);
        return;
    }

    /* Do something with the data, here. */

    priv->main_comp = icalparser_parse_string (priv->vcalendar);
    if (priv->main_comp == NULL) {
        g_printerr ("e-itip-control.c: the iCalendar data was invalid!\n");
        return;
    }

    priv->comp = icalcomponent_get_first_component (priv->main_comp,
                            ICAL_ANY_COMPONENT);
    if (priv->comp == NULL) {
        g_printerr ("e-itip-control.c: I could not extract a proper component from\n"
                "     the vCalendar data.\n");
        icalcomponent_free (priv->main_comp);
        return;
    }

    comp_kind = icalcomponent_isa (priv->comp);

    switch (comp_kind) {
    case ICAL_VEVENT_COMPONENT:
    case ICAL_VTODO_COMPONENT:
    case ICAL_VJOURNAL_COMPONENT:
        priv->cal_comp = cal_component_new ();
        if (cal_component_set_icalcomponent (priv->cal_comp, priv->comp) == FALSE) {
            g_printerr ("e-itip-control.c: I couldn't create a CalComponent from the iTip data.\n");
            gtk_object_unref (GTK_OBJECT (priv->cal_comp));
        }
        break;
    case ICAL_VFREEBUSY_COMPONENT:
        /* Take care of busy time information. */
        return;
        break;
    default:
        /* We don't know what this is, so bail. */
        {
        GtkWidget *dialog;

        dialog = gnome_warning_dialog("I don't recognize this type of calendar component.");
        gnome_dialog_run (GNOME_DIALOG(dialog));

        g_free (priv->vcalendar);
        priv->vcalendar = NULL;

        return;
        }
        break;
    } /* End switch. */


    /* Okay, good then; now I will pick apart the component to get
     all the things I'll show in my control. */
    {
        icalproperty *prop;
        gchar *new_text;
        gchar *organizer, *description, *summary;
        struct icaltimetype dtstart, dtend;
        time_t tstart, tend;

        prop = icalcomponent_get_first_property (priv->comp, ICAL_ORGANIZER_PROPERTY);
        if (prop) {
            organizer = icalproperty_get_organizer (prop);
        
            /* Here I strip off the "MAILTO:" if it is present. */
            new_text = strchr (organizer, ':');
            if (new_text != NULL)
                new_text++;
            else
                new_text = organizer;

            priv->organizer = g_strdup (new_text);
            gtk_entry_set_text (GTK_ENTRY (priv->organizer_entry), new_text);
        }

        prop = icalcomponent_get_first_property (priv->comp, ICAL_SUMMARY_PROPERTY);
        if (prop) {
            summary = icalproperty_get_summary (prop);
            gtk_entry_set_text (GTK_ENTRY (priv->summary_entry), summary);
        }

        prop = icalcomponent_get_first_property (priv->comp, ICAL_DESCRIPTION_PROPERTY);
        if (prop) {
            description = icalproperty_get_summary (prop);
    
            pos = 0;
            length = strlen (description);
            length2 = strlen (gtk_editable_get_chars 
                        (GTK_EDITABLE (priv->description_box), 0, -1));
        
            if (length2 > 0)
                gtk_editable_delete_text (GTK_EDITABLE (priv->description_box), 0, length2);
        
            gtk_editable_insert_text (GTK_EDITABLE (priv->description_box),
                          description,
                          length,
                          &pos);
        }

        prop = icalcomponent_get_first_property (priv->comp, ICAL_DTSTART_PROPERTY);
        dtstart = icalproperty_get_dtstart (prop);
        prop = icalcomponent_get_first_property (priv->comp, ICAL_DTEND_PROPERTY);
        dtend = icalproperty_get_dtend (prop);

        tstart = icaltime_as_timet (dtstart);
        tend = icaltime_as_timet (dtend);

        gtk_label_set_text (GTK_LABEL (priv->dtstart_label), ctime (&tstart));
        gtk_label_set_text (GTK_LABEL (priv->dtend_label), ctime (&tend));

        /* Clear out any old-assed text that's been lying around in my message box. */
        gtk_editable_delete_text (GTK_EDITABLE (priv->message_text), 0, -1);

        prop = icalcomponent_get_first_property (priv->main_comp, ICAL_METHOD_PROPERTY);
        switch (icalproperty_get_method (prop)) {
        case ICAL_METHOD_PUBLISH:
            sprintf (message, "%s has published calendar information, "
                      "which you can add to your own calendar."
                      "No reply is necessary.", 
                 priv->from_address);
            break;
        case ICAL_METHOD_REQUEST:
            {
            /* I'll check if I have to rsvp. */
            icalproperty *prop;
            icalparameter *param;
            int rsvp = FALSE;

            prop = find_attendee (priv->comp, priv->my_address);
            if (prop) {
                param = get_icalparam_by_type (prop, ICAL_RSVP_PARAMETER);
    
                if (param) {
                    if (icalparameter_get_rsvp (param))
                        rsvp = TRUE;
                }
            }

            sprintf (message, "This is a meeting organized by %s, "
                      "who indicated that you %s RSVP.",
                 (priv->organizer ? priv->organizer : "an unknown person"), 
                 (rsvp ? "should" : "don't have to") );

            }
            break;
        default:
            sprintf (message, "I haven't the slightest notion what this calendar "
                      "object represents. Sorry.");
        }

        {
        int pos = 0;

        gtk_editable_insert_text (GTK_EDITABLE (priv->message_text), message,
                      strlen (message), &pos);
        }
    }

} /* pstream_load */

/*
 * This function implements the Bonobo::PersistStream:save method.
 */
static void
pstream_save (BonoboPersistStream *ps, const Bonobo_Stream stream,
          Bonobo_Persist_ContentType type, void *data,
          CORBA_Environment *ev)
{
    EItipControlPrivate *priv = data;
    int                  length;

    if (type && g_strcasecmp (type, "text/calendar") != 0 &&        
        g_strcasecmp (type, "text/x-calendar") != 0) {      
        CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                     ex_Bonobo_Persist_WrongDataType, NULL);
        return;
    }

    /* Put something into vcalendar here. */
    length = strlen (priv->vcalendar);

    bonobo_stream_client_write (stream, priv->vcalendar, length, ev);
} /* pstream_save */

static CORBA_long
pstream_get_max_size (BonoboPersistStream *ps, void *data,
              CORBA_Environment *ev)
{
    EItipControlPrivate *priv = data;
  
    if (priv->vcalendar)
        return strlen (priv->vcalendar);
    else
        return 0L;
}

static Bonobo_Persist_ContentTypeList *
pstream_get_content_types (BonoboPersistStream *ps, void *closure,
               CORBA_Environment *ev)
{
    return bonobo_persist_generate_content_types (2, "text/calendar", "text/x-calendar");
}

static void
get_prop ( BonoboPropertyBag *bag, BonoboArg *arg,
       guint arg_id, gpointer user_data )
{
    EItipControlPrivate *priv = user_data;

    if (arg_id == FROM_ADDRESS_ARG_ID) {
        BONOBO_ARG_SET_STRING (arg, priv->from_address);
    }
    else if (arg_id == MY_ADDRESS_ARG_ID) {
        BONOBO_ARG_SET_STRING (arg, priv->my_address);
    }
}

static void
set_prop ( BonoboPropertyBag *bag, const BonoboArg *arg,
       guint arg_id, gpointer user_data )
{
    EItipControlPrivate *priv = user_data;

    if (arg_id == FROM_ADDRESS_ARG_ID) {
        if (priv->from_address)
            g_free (priv->from_address);
    
        
        priv->from_address = g_strdup (BONOBO_ARG_GET_STRING (arg));

        /* Let's set the widget here, though I'm not sure if
           it will work. */
        gtk_entry_set_text (GTK_ENTRY (priv->address_entry), priv->from_address);
        
    }
    else if (arg_id == MY_ADDRESS_ARG_ID) {
        if (priv->my_address)
            g_free (priv->my_address);
        
        priv->my_address = g_strdup (BONOBO_ARG_GET_STRING (arg));
    }
}


static BonoboObject *
e_itip_control_factory (BonoboGenericFactory *Factory, void *closure)
{
    BonoboControl      *control;
    BonoboPropertyBag *prop_bag;
    BonoboPersistStream *stream;
    EItipControlPrivate *priv;

    priv = g_new0 (EItipControlPrivate, 1);

    priv->xml = glade_xml_new (EVOLUTION_GLADEDIR "/" "e-itip-control.glade", "main_frame");

    /* Create the control. */
    priv->main_frame = glade_xml_get_widget (priv->xml, "main_frame");
    priv->organizer_entry = glade_xml_get_widget (priv->xml, "organizer_entry");
    priv->dtstart_label = glade_xml_get_widget (priv->xml, "dtstart_label");
    priv->dtend_label = glade_xml_get_widget (priv->xml, "dtend_label");
    priv->summary_entry = glade_xml_get_widget (priv->xml, "summary_entry");
    priv->description_box = glade_xml_get_widget (priv->xml, "description_box");
    /* priv->add_button = glade_xml_get_widget (priv->xml, "add_button"); */
    priv->address_entry = glade_xml_get_widget (priv->xml, "address_entry");
    priv->message_text = glade_xml_get_widget (priv->xml, "message_text");

    gtk_text_set_word_wrap (GTK_TEXT (priv->message_text), TRUE);
    
    priv->xml2 = glade_xml_new (EVOLUTION_GLADEDIR "/" "e-itip-control.glade", "loading_window");
    priv->loading_progress = glade_xml_get_widget (priv->xml2, "loading_progress");
    priv->loading_window = glade_xml_get_widget (priv->xml2, "loading_window");

    gtk_signal_connect (GTK_OBJECT (priv->main_frame), "destroy",
                GTK_SIGNAL_FUNC (itip_control_destroy_cb), priv);
    gtk_signal_connect (GTK_OBJECT (priv->main_frame), "size_request",
                GTK_SIGNAL_FUNC (itip_control_size_request_cb), priv);

    gtk_widget_show (priv->main_frame);

    control = bonobo_control_new (priv->main_frame);

    /* create a property bag */
    prop_bag = bonobo_property_bag_new ( get_prop, set_prop, priv );
    bonobo_control_set_properties (control, prop_bag);

    bonobo_property_bag_add (prop_bag, "from_address", FROM_ADDRESS_ARG_ID, BONOBO_ARG_STRING, NULL,
                 "from_address", 0 );
    bonobo_property_bag_add (prop_bag, "my_address", MY_ADDRESS_ARG_ID, BONOBO_ARG_STRING, NULL,
                 "my_address", 0 );

    bonobo_control_set_automerge (control, TRUE);   

    stream = bonobo_persist_stream_new (pstream_load, pstream_save,
                        pstream_get_max_size,
                        pstream_get_content_types,
                        priv);

    if (stream == NULL) {
        bonobo_object_unref (BONOBO_OBJECT (control));
        return NULL;
    }

    bonobo_object_add_interface (BONOBO_OBJECT (control),
                    BONOBO_OBJECT (stream));

    return BONOBO_OBJECT (control);
}

void
e_itip_control_factory_init (void)
{
    static BonoboGenericFactory *factory = NULL;

    if (factory != NULL)
        return;

    factory =
        bonobo_generic_factory_new (
                "OAFIID:control-factory:e_itipview:10441fcf-9a4f-4bf9-a026-d50b5462d45a",
            e_itip_control_factory, NULL);

    if (factory == NULL)
        g_error ("I could not register an iTip control factory.");
}