/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* camel-session.c : Abstract class for an email session */
/*
*
* Author:
* Bertrand Guiheneuf <bertrand@helixcode.com>
* Dan Winship <danw@helixcode.com>
*
* Copyright 1999, 2000 Helix Code, Inc. (http://www.helixcode.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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#include <config.h>
#include <stdio.h>
#include "camel-session.h"
#include "camel-store.h"
#include "camel-transport.h"
#include "camel-exception.h"
#include "string-utils.h"
#include "camel-url.h"
#include "hash-table-utils.h"
static CamelObjectClass *parent_class;
static void
camel_session_init (CamelSession *session)
{
session->modules = camel_provider_init ();
session->providers =
g_hash_table_new (g_strcase_hash, g_strcase_equal);
session->service_cache =
g_hash_table_new (camel_url_hash, camel_url_equal);
}
static void
camel_session_finalise(GtkObject *o)
{
CamelSession *session = (CamelSession *)o;
g_hash_table_destroy(session->service_cache);
g_hash_table_destroy(session->providers);
GTK_OBJECT_CLASS (parent_class)->finalize (o);
}
static void
camel_session_class_init (CamelServiceClass *camel_service_class)
{
GtkObjectClass *object_class = (GtkObjectClass *)camel_service_class;
parent_class = gtk_type_class (camel_object_get_type ());
object_class->finalize = camel_session_finalise;
}
GtkType
camel_session_get_type (void)
{
static GtkType camel_session_type = 0;
if (!camel_session_type) {
GtkTypeInfo camel_session_info =
{
"CamelSession",
sizeof (CamelSession),
sizeof (CamelSessionClass),
(GtkClassInitFunc) camel_session_class_init,
(GtkObjectInitFunc) camel_session_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
camel_session_type = gtk_type_unique (camel_object_get_type (),
&camel_session_info);
}
return camel_session_type;
}
CamelSession *
camel_session_new (CamelAuthCallback authenticator)
{
CamelSession *session = gtk_type_new (CAMEL_SESSION_TYPE);
session->authenticator = authenticator;
return session;
}
/**
* camel_session_register_provider:
* @session: a session object
* @protocol: the protocol the provider provides for
* @provider: provider object
*
* Registers a protocol to provider mapping for the session.
**/
void
camel_session_register_provider (CamelSession *session,
CamelProvider *provider)
{
g_return_if_fail (CAMEL_IS_SESSION (session));
g_return_if_fail (provider != NULL);
g_hash_table_insert (session->providers, provider->protocol, provider);
}
static void
ensure_loaded (gpointer key, gpointer value, gpointer user_data)
{
CamelSession *session = user_data;
char *name = key;
char *path = value;
if (!g_hash_table_lookup (session->providers, name)) {
CamelException ex;
camel_exception_init (&ex);
camel_provider_load (session, path, &ex);
camel_exception_clear (&ex);
}
}
static gint
provider_compare (gconstpointer a, gconstpointer b)
{
const CamelProvider *cpa = (const CamelProvider *)a;
const CamelProvider *cpb = (const CamelProvider *)b;
return strcmp (cpa->name, cpb->name);
}
static void
add_to_list (gpointer key, gpointer value, gpointer user_data)
{
GList **list = user_data;
CamelProvider *prov = value;
*list = g_list_insert_sorted (*list, prov, provider_compare);
}
/**
* camel_session_list_providers:
* @session: the session
* @load: whether or not to load in providers that are not already loaded
*
* This returns a list of available providers in this session. If @load
* is %TRUE, it will first load in all available providers that haven't
* yet been loaded.
*
* Return value: a GList of providers, which the caller must free.
**/
GList *
camel_session_list_providers (CamelSession *session, gboolean load)
{
GList *list;
g_return_val_if_fail (CAMEL_IS_SESSION (session), NULL);
if (load) {
g_hash_table_foreach (session->modules, ensure_loaded,
session);
}
list = NULL;
g_hash_table_foreach (session->providers, add_to_list, &list);
return list;
}
static void
service_cache_remove(CamelService *service, CamelSession *session)
{
g_hash_table_remove(session->service_cache, service->url);
}
CamelService *
camel_session_get_service (CamelSession *session, const char *url_string,
CamelProviderType type, CamelException *ex)
{
CamelURL *url;
const CamelProvider *provider;
CamelService *service;
url = camel_url_new (url_string, ex);
if (!url)
return NULL;
/* lookup in cache first */
printf("looking up service in cache: %s\n", url_string);
service = g_hash_table_lookup(session->service_cache, url);
if (service != NULL) {
printf("found!!\n");
camel_url_free(url);
gtk_object_ref((GtkObject *)service);
return service;
}
printf("not found, creating service\n");
provider = g_hash_table_lookup (session->providers, url->protocol);
if (!provider) {
/* See if there's one we can load. */
char *path;
path = g_hash_table_lookup (session->modules, url->protocol);
if (path) {
camel_provider_load (session, path, ex);
if (camel_exception_get_id (ex) !=
CAMEL_EXCEPTION_NONE) {
camel_url_free (url);
return NULL;
}
}
provider = g_hash_table_lookup (session->providers,
url->protocol);
}
if (!provider || !provider->object_types[type]) {
camel_exception_setv (ex, CAMEL_EXCEPTION_SERVICE_URL_INVALID,
"No %s available for protocol `%s'",
camel_provider_type_name[type],
url->protocol);
camel_url_free (url);
return NULL;
}
service = camel_service_new (provider->object_types[type], session, url, ex);
if (service) {
g_hash_table_insert(session->service_cache, url, service);
gtk_signal_connect((GtkObject *)service, "destroy", service_cache_remove, session);
}
return service;
}
/**
* camel_session_query_authenticator: query the session authenticator
* @session: session object
* @mode: %CAMEL_AUTHENTICATOR_ASK or %CAMEL_AUTHENTICATOR_TELL
* @data: prompt to query user with, or data to cache
* @secret: whether or not the data is secret (eg, a password)
* @service: the service this query is being made by
* @item: an identifier, unique within this service, for the information
* @ex: a CamelException
*
* This function is used by a CamelService to discuss authentication
* information with the application.
*
* @service and @item together uniquely identify the piece of data the
* caller is concerned with.
*
* If @mode is %CAMEL_AUTHENTICATOR_ASK, then @data is a question to
* ask the user (if the application doesn't already have the answer
* cached). If @secret is set, the user's input should not be echoed
* back. The authenticator should set @ex to
* %CAMEL_EXCEPTION_USER_CANCEL if the user did not provide the
* information. The caller must g_free() the information returned when
* it is done with it.
*
* If @mode is %CAMEL_AUTHENTICATOR_TELL, then @data is information
* that the application should cache, or %NULL if it should stop
* caching anything about that datum (eg, because the data is a
* password that turned out to be incorrect).
*
* Return value: the authentication information or %NULL.
**/
char *
camel_session_query_authenticator (CamelSession *session,
CamelAuthCallbackMode mode,
char *prompt, gboolean secret,
CamelService *service, char *item,
CamelException *ex)
{
return session->authenticator (mode, prompt, secret,
service, item, ex);
}
