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/*
* Copyright (C) 2016, 2017 "IoT.bzh"
* Author: José Bollo <jose.bollo@iot.bzh>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define _GNU_SOURCE
#include <stdlib.h>
#include <string.h>
#include <json-c/json.h>
#include <afb/afb-req-itf.h>
#include "afb-subcall.h"
#include "afb-msg-json.h"
#include "afb-apis.h"
#include "afb-context.h"
#include "afb-xreq.h"
#include "verbose.h"
struct subcall;
static void subcall_destroy(void *closure);
static void subcall_reply(void *closure, int iserror, struct json_object *obj);
static int subcall_subscribe(void *closure, struct afb_event event);
static int subcall_unsubscribe(void *closure, struct afb_event event);
const struct afb_xreq_query_itf afb_subcall_xreq_itf = {
.reply = subcall_reply,
.unref = subcall_destroy,
.subscribe = subcall_subscribe,
.unsubscribe = subcall_unsubscribe
};
struct subcall
{
struct afb_xreq xreq;
struct afb_xreq *caller;
void (*callback)(void*, int, struct json_object*);
void *closure;
};
static void subcall_destroy(void *closure)
{
struct subcall *subcall = closure;
json_object_put(subcall->xreq.json);
afb_xreq_unref(subcall->caller);
free(subcall);
}
static void subcall_reply(void *closure, int iserror, struct json_object *obj)
{
struct subcall *subcall = closure;
subcall->callback(subcall->closure, iserror, obj);
json_object_put(obj);
}
static int subcall_subscribe(void *closure, struct afb_event event)
{
struct subcall *subcall = closure;
return afb_xreq_subscribe(subcall->caller, event);
}
static int subcall_unsubscribe(void *closure, struct afb_event event)
{
struct subcall *subcall = closure;
return afb_xreq_unsubscribe(subcall->caller, event);
}
void afb_subcall_internal_error(void (*callback)(void*, int, struct json_object*), void *closure)
{
static struct json_object *obj;
if (obj == NULL)
obj = afb_msg_json_reply_error("failed", "internal error", NULL, NULL);
callback(closure, 1, obj);
}
static struct subcall *create_subcall(struct afb_xreq *caller, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*), void *closure)
{
struct subcall *subcall;
subcall = calloc(1, sizeof *subcall);
if (subcall == NULL) {
return NULL;
}
afb_context_subinit(&subcall->xreq.context, &caller->context);
subcall->xreq.refcount = 1;
subcall->xreq.json = args;
subcall->xreq.api = api; /* TODO: alloc ? */
subcall->xreq.verb = verb; /* TODO: alloc ? */
subcall->xreq.query = subcall;
subcall->xreq.queryitf = &afb_subcall_xreq_itf;
subcall->caller = caller;
subcall->callback = callback;
subcall->closure = closure;
return subcall;
}
void afb_subcall(
struct afb_xreq *caller,
const char *api,
const char *verb,
struct json_object *args,
void (*callback)(void*, int, struct json_object*),
void *closure
)
{
struct subcall *subcall;
subcall = create_subcall(caller, api, verb, args, callback, closure);
if (subcall == NULL) {
afb_subcall_internal_error(callback, closure);
return;
}
afb_xreq_addref(caller);
afb_apis_xcall(&subcall->xreq);
afb_xreq_unref(&subcall->xreq);
}
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