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/*
* Copyright (C) 2015, 2016 "IoT.bzh"
* Author "Fulup Ar Foll"
*
* 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 <stdio.h>
#include <string.h>
#include <json-c/json.h>
#include <afb/afb-binding.h>
#include "xxx-service-hat.h"
const struct afb_binding_interface *interface;
static struct event *events = 0;
/* searchs the event of tag */
struct event *event_get(const char *tag)
{
struct event *e = events;
while(e && strcmp(e->tag, tag))
e = e->next;
return e;
}
/* deletes the event of tag */
int event_del(const char *tag)
{
struct event *e, **p;
/* check exists */
e = event_get(tag);
if (!e) return -1;
/* unlink */
p = &events;
while(*p != e) p = &(*p)->next;
*p = e->next;
/* destroys */
afb_event_drop(e->event);
free(e);
return 0;
}
/* creates the event of tag */
int event_add(const char *tag, const char *name)
{
struct event *e;
/* check valid tag */
e = event_get(tag);
if (e) return -1;
/* creation */
e = malloc(strlen(tag) + sizeof *e);
if (!e) return -1;
strcpy(e->tag, tag);
/* make the event */
e->event = afb_daemon_make_event(interface->daemon, name);
if (!e->event.closure) { free(e); return -1; }
/* link */
e->next = events;
events = e;
return 0;
}
int event_subscribe(struct afb_req request, const char *tag)
{
struct event *e;
e = event_get(tag);
return e ? afb_req_subscribe(request, e->event) : -1;
}
int event_unsubscribe(struct afb_req request, const char *tag)
{
struct event *e;
e = event_get(tag);
return e ? afb_req_unsubscribe(request, e->event) : -1;
}
int event_push(struct json_object *args, const char *tag)
{
struct event *e;
e = event_get(tag);
return e ? afb_event_push(e->event, json_object_get(args)) : -1;
}
// Sample Generic Ping Debug API
static void ping(struct afb_req request, json_object *jresp, const char *tag)
{
static int pingcount = 0;
json_object *query = afb_req_json(request);
afb_req_success_f(request, jresp, "Ping Binder Daemon tag=%s count=%d query=%s", tag, ++pingcount, json_object_to_json_string(query));
}
void pingSample (struct afb_req request)
{
ping(request, json_object_new_string ("Some String"), "pingSample");
}
void pingFail (struct afb_req request)
{
afb_req_fail(request, "failed", "Ping Binder Daemon fails");
}
void pingNull (struct afb_req request)
{
ping(request, NULL, "pingNull");
}
void pingBug (struct afb_req request)
{
ping((struct afb_req){NULL,NULL}, NULL, "pingBug");
}
void pingEvent(struct afb_req request)
{
json_object *query = afb_req_json(request);
afb_daemon_broadcast_event(interface->daemon, "event", json_object_get(query));
ping(request, json_object_get(query), "event");
}
// For samples https://linuxprograms.wordpress.com/2010/05/20/json-c-libjson-tutorial/
void pingJson (struct afb_req request) {
json_object *jresp, *embed;
jresp = json_object_new_object();
json_object_object_add(jresp, "myString", json_object_new_string ("Some String"));
json_object_object_add(jresp, "myInt", json_object_new_int (1234));
embed = json_object_new_object();
json_object_object_add(embed, "subObjString", json_object_new_string ("Some String"));
json_object_object_add(embed, "subObjInt", json_object_new_int (5678));
json_object_object_add(jresp,"eobj", embed);
ping(request, jresp, "pingJson");
}
void subcallcb (void *prequest, int iserror, json_object *object)
{
struct afb_req request = afb_req_unstore(prequest);
if (iserror)
afb_req_fail(request, "failed", json_object_to_json_string(object));
else
afb_req_success(request, object, NULL);
afb_req_unref(request);
}
void subcall (struct afb_req request)
{
const char *api = afb_req_value(request, "api");
const char *verb = afb_req_value(request, "verb");
const char *args = afb_req_value(request, "args");
json_object *object = api && verb && args ? json_tokener_parse(args) : NULL;
if (object == NULL)
afb_req_fail(request, "failed", "bad arguments");
else
afb_req_subcall(request, api, verb, object, subcallcb, afb_req_store(request));
}
void eventadd (struct afb_req request)
{
const char *tag = afb_req_value(request, "tag");
const char *name = afb_req_value(request, "name");
if (tag == NULL || name == NULL)
afb_req_fail(request, "failed", "bad arguments");
else if (0 != event_add(tag, name))
afb_req_fail(request, "failed", "creation error");
else
afb_req_success(request, NULL, NULL);
}
void eventdel (struct afb_req request)
{
const char *tag = afb_req_value(request, "tag");
if (tag == NULL)
afb_req_fail(request, "failed", "bad arguments");
else if (0 != event_del(tag))
afb_req_fail(request, "failed", "deletion error");
else
afb_req_success(request, NULL, NULL);
}
void eventsub (struct afb_req request)
{
const char *tag = afb_req_value(request, "tag");
if (tag == NULL)
afb_req_fail(request, "failed", "bad arguments");
else if (0 != event_subscribe(request, tag))
afb_req_fail(request, "failed", "subscription error");
else
afb_req_success(request, NULL, NULL);
}
void eventunsub (struct afb_req request)
{
const char *tag = afb_req_value(request, "tag");
if (tag == NULL)
afb_req_fail(request, "failed", "bad arguments");
else if (0 != event_unsubscribe(request, tag))
afb_req_fail(request, "failed", "unsubscription error");
else
afb_req_success(request, NULL, NULL);
}
void eventpush (struct afb_req request)
{
const char *tag = afb_req_value(request, "tag");
const char *data = afb_req_value(request, "data");
json_object *object = data ? json_tokener_parse(data) : NULL;
if (tag == NULL)
afb_req_fail(request, "failed", "bad arguments");
else if (0 > event_push(object, tag))
afb_req_fail(request, "failed", "push error");
else
afb_req_success(request, NULL, NULL);
}
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