path: root/addressbook/backend/pas/pas-book-factory.c

/*
 *
 * Author:
 *   Nat Friedman (nat@helixcode.com)
 *
 * Copyright 2000, Helix Code, Inc.
 */

#include <ctype.h>
#include <libgnorba/gnorba.h>
#include <addressbook.h>
#include <pas-book-factory.h>

#define PAS_BOOK_FACTORY_GOAD_ID "evolution:card-server"

static GnomeObjectClass          *pas_book_factory_parent_class;
POA_Evolution_BookFactory__vepv   pas_book_factory_vepv;

typedef struct {
    char                              *uri;
    Evolution_BookListener             listener;
} PASBookFactoryQueuedRequest;

struct _PASBookFactoryPrivate {
    gint        idle_id;
    GHashTable *backends;
    GHashTable *active_server_map;
    GList      *queued_requests;
};

static char *
pas_book_factory_canonicalize_uri (const char *uri)
{
    /* FIXME: What do I do here? */

    return g_strdup (uri);
}

static char *
pas_book_factory_extract_proto_from_uri (const char *uri)
{
    char *proto;
    char *p;

    p = strchr (uri, ':');

    if (p == NULL)
        return NULL;

    proto = g_malloc0 (p - uri + 1);

    strncpy (proto, uri, p - uri);

    return proto;
}

/**
 * pas_book_factory_register_backend:
 * @factory:
 * @proto:
 * @backend:
 */
void
pas_book_factory_register_backend (PASBookFactory      *factory,
                   const char          *proto,
                   PASBackendFactoryFn  backend)
{
    g_return_if_fail (factory != NULL);
    g_return_if_fail (PAS_IS_BOOK_FACTORY (factory));
    g_return_if_fail (proto != NULL);
    g_return_if_fail (backend != NULL);

    

    if (g_hash_table_lookup (factory->priv->backends, proto) != NULL) {
        g_warning ("pas_book_factory_register_backend: "
               "Proto \"%s\" already registered!\n", proto);
    }

    g_hash_table_insert (factory->priv->backends,
                 g_strdup (proto), backend);
}

static PASBackendFactoryFn
pas_book_factory_lookup_backend_factory (PASBookFactory *factory,
                     const char     *uri)
{
    PASBackendFactoryFn  backend;
    char                *proto;
    char                *canonical_uri;

    g_assert (factory != NULL);
    g_assert (PAS_IS_BOOK_FACTORY (factory));
    g_assert (uri != NULL);

    canonical_uri = pas_book_factory_canonicalize_uri (uri);
    if (canonical_uri == NULL)
        return NULL;

    proto = pas_book_factory_extract_proto_from_uri (canonical_uri);
    if (proto == NULL) {
        g_free (canonical_uri);
        return NULL;
    }

    backend = g_hash_table_lookup (factory->priv->backends, proto);

    g_free (proto); 
    g_free (canonical_uri);

    return backend;
}

static PASBackend *
pas_book_factory_launch_backend (PASBookFactory              *factory,
                 PASBookFactoryQueuedRequest *request)
{
    PASBackendFactoryFn  backend_factory;
    PASBackend          *backend;

    backend_factory = pas_book_factory_lookup_backend_factory (
        factory, request->uri);
    g_assert (backend_factory != NULL);

    backend = (backend_factory) ();
    g_assert (backend != NULL);

    g_hash_table_insert (factory->priv->active_server_map,
                 g_strdup (request->uri),
                 backend);

    return backend;
}

static void
pas_book_factory_process_request (PASBookFactory              *factory,
                  PASBookFactoryQueuedRequest *request)
{
    PASBackend *backend;

    request = factory->priv->queued_requests->data;

    backend = g_hash_table_lookup (factory->priv->active_server_map, request->uri);

    if (backend == NULL) {

        backend = pas_book_factory_launch_backend (factory, request);
        pas_backend_add_client (backend, request->listener);
        pas_backend_load_uri (backend, request->uri);
        g_free (request->uri);

        return;
    }

    g_free (request->uri);

    pas_backend_add_client (backend, request->listener);
}

static gboolean
pas_book_factory_process_queue (PASBookFactory *factory)
{
    /* Process pending Book-creation requests. */
    if (factory->priv->queued_requests != NULL) {
        PASBookFactoryQueuedRequest  *request;

        request = factory->priv->queued_requests->data;

        pas_book_factory_process_request (factory, request);

        factory->priv->queued_requests = g_list_remove (
            factory->priv->queued_requests, request);

        g_free (request);
    }

    if (factory->priv->queued_requests == NULL) {

        factory->priv->idle_id = 0;
        return FALSE;
    }

    return TRUE;
}

static void
pas_book_factory_queue_request (PASBookFactory               *factory,
                const char                   *uri,
                const Evolution_BookListener  listener)
{
    PASBookFactoryQueuedRequest *request;
    Evolution_BookListener       listener_copy;
    CORBA_Environment            ev;

    CORBA_exception_init (&ev);

    listener_copy = CORBA_Object_duplicate (listener, &ev);

    if (ev._major != CORBA_NO_EXCEPTION) {
        g_warning ("PASBookFactory: Could not duplicate BookListener!\n");
        CORBA_exception_free (&ev);
        return;
    }

    CORBA_exception_free (&ev);

    request           = g_new0 (PASBookFactoryQueuedRequest, 1);
    request->listener = listener_copy;
    request->uri      = g_strdup (uri);

    factory->priv->queued_requests =
        g_list_prepend (factory->priv->queued_requests, request);

    if (! factory->priv->idle_id) {
        factory->priv->idle_id =
            g_idle_add ((GSourceFunc) pas_book_factory_process_queue, factory);
    }
}


static void
impl_Evolution_BookFactory_open_book (PortableServer_Servant        servant,
                      const CORBA_char             *uri,
                      const Evolution_BookListener  listener,
                      CORBA_Environment            *ev)
{
    PASBookFactory      *factory =
        PAS_BOOK_FACTORY (gnome_object_from_servant (servant));
    PASBackendFactoryFn  backend_factory;

    backend_factory = pas_book_factory_lookup_backend_factory (factory, uri);

    if (backend_factory == NULL) {
        g_warning ("PASBookFactory: No backend found for uri: %s\n", uri);

        CORBA_exception_set (
            ev, CORBA_USER_EXCEPTION,
            ex_Evolution_BookFactory_ProtocolNotSupported, NULL);

        return;
    }

    pas_book_factory_queue_request (factory, uri, listener);
}

static gboolean
pas_book_factory_construct (PASBookFactory *factory)
{
    POA_Evolution_BookFactory  *servant;
    CORBA_Environment           ev;
    CORBA_Object                obj;

    g_assert (factory != NULL);
    g_assert (PAS_IS_BOOK_FACTORY (factory));

    servant = (POA_Evolution_BookFactory *) g_new0 (GnomeObjectServant, 1);
    servant->vepv = &pas_book_factory_vepv;

    CORBA_exception_init (&ev);

    POA_Evolution_BookFactory__init ((PortableServer_Servant) servant, &ev);
    if (ev._major != CORBA_NO_EXCEPTION) {
        g_free (servant);
        CORBA_exception_free (&ev);

        return FALSE;
    }

    CORBA_exception_free (&ev);

    obj = gnome_object_activate_servant (GNOME_OBJECT (factory), servant);
    if (obj == CORBA_OBJECT_NIL) {
        g_free (servant);

        return FALSE;
    }

    gnome_object_construct (GNOME_OBJECT (factory), obj);

    return TRUE;
}

/**
 * pas_book_factory_new:
 */
PASBookFactory *
pas_book_factory_new (void)
{
    PASBookFactory *factory;

    factory = gtk_type_new (pas_book_factory_get_type ());

    if (! pas_book_factory_construct (factory)) {
        g_warning ("pas_book_factory_new: Could not construct PASBookFactory!\n");
        gtk_object_unref (GTK_OBJECT (factory));

        return NULL;
    }

    return factory;
}

/**
 * pas_book_factory_activate:
 */
void
pas_book_factory_activate (PASBookFactory *factory)
{
    CORBA_Environment  ev;
    int                ret;

    g_return_if_fail (factory != NULL);
    g_return_if_fail (PAS_IS_BOOK_FACTORY (factory));

    CORBA_exception_init (&ev);

    ret = goad_server_register (
        NULL,
        gnome_object_corba_objref (GNOME_OBJECT (factory)),
        PAS_BOOK_FACTORY_GOAD_ID, "server",
        &ev);

    if (ev._major != CORBA_NO_EXCEPTION) {
        g_message ("pas_book_factory_construct: Exception "
               "registering PASBookFactory!\n");
        CORBA_exception_free (&ev);
        return;
    }

    CORBA_exception_free (&ev);

    if (ret == -1) {
        g_message ("pas_book_factory_construct: Error "
               "registering PASBookFactory!\n");
        return;
    }

    if (ret == -2) {
        g_message ("pas_book_factory_construct: Another "
               "PASBookFactory is already running.\n");
        return;
        
    }

    return;
}


static void
pas_book_factory_init (PASBookFactory *factory)
{
    factory->priv = g_new0 (PASBookFactoryPrivate, 1);

    factory->priv->active_server_map = g_hash_table_new (g_str_hash, g_str_equal);
    factory->priv->backends          = g_hash_table_new (g_str_hash, g_str_equal);
    factory->priv->queued_requests   = NULL;
}

static gboolean
pas_book_factory_remove_asm_entry (gpointer key, gpointer value,
                   gpointer data)
{
    CORBA_Environment ev;

    g_free (key);

    CORBA_exception_init (&ev);
    CORBA_Object_release ((CORBA_Object) value, &ev);
    CORBA_exception_free (&ev);

    return TRUE;
}

static gboolean
pas_book_factory_remove_backend_entry (gpointer key, gpointer value,
                       gpointer data)
{
    g_free (key);
    return TRUE;
}

static void
pas_book_factory_destroy (GtkObject *object)
{
    PASBookFactory *factory = PAS_BOOK_FACTORY (object);
    GList          *l;

    for (l = factory->priv->queued_requests; l != NULL; l = l->next) {
        PASBookFactoryQueuedRequest *request = l->data;
        CORBA_Environment ev;

        g_free (request->uri);

        CORBA_exception_init (&ev);
        CORBA_Object_release (request->listener, &ev);
        CORBA_exception_free (&ev);

        g_free (request);
    }
    g_list_free (factory->priv->queued_requests);
    factory->priv->queued_requests = NULL;

    g_hash_table_foreach_remove (factory->priv->active_server_map,
                     pas_book_factory_remove_asm_entry,
                     NULL);
    g_hash_table_destroy (factory->priv->active_server_map);

    g_hash_table_foreach_remove (factory->priv->backends,
                     pas_book_factory_remove_backend_entry,
                     NULL);
    g_hash_table_destroy (factory->priv->backends);
    
    g_free (factory->priv);

    GTK_OBJECT_CLASS (pas_book_factory_parent_class)->destroy (object);
}

static POA_Evolution_BookFactory__epv *
pas_book_factory_get_epv (void)
{
    POA_Evolution_BookFactory__epv *epv;

    epv = g_new0 (POA_Evolution_BookFactory__epv, 1);

    epv->open_book = impl_Evolution_BookFactory_open_book;

    return epv;
    
}

static void
pas_book_factory_corba_class_init (void)
{
    pas_book_factory_vepv.GNOME_Unknown_epv         = gnome_object_get_epv ();
    pas_book_factory_vepv.Evolution_BookFactory_epv = pas_book_factory_get_epv ();
}

static void
pas_book_factory_class_init (PASBookFactoryClass *klass)
{
    GtkObjectClass *object_class = (GtkObjectClass *) klass;

    pas_book_factory_parent_class = gtk_type_class (gnome_object_get_type ());

    object_class->destroy = pas_book_factory_destroy;

    pas_book_factory_corba_class_init ();
}

/**
 * pas_book_factory_get_type:
 */
GtkType
pas_book_factory_get_type (void)
{
    static GtkType type = 0;

    if (! type) {
        GtkTypeInfo info = {
            "PASBookFactory",
            sizeof (PASBookFactory),
            sizeof (PASBookFactoryClass),
            (GtkClassInitFunc)  pas_book_factory_class_init,
            (GtkObjectInitFunc) pas_book_factory_init,
            NULL, /* reserved 1 */
            NULL, /* reserved 2 */
            (GtkClassInitFunc) NULL
        };

        type = gtk_type_unique (gnome_object_get_type (), &info);
    }

    return type;
}