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<title>Sound Manager: R:/SoundManagerBinding/src/soundmanager.c Source File</title>
<l/*
* Copyright (C) 2015, 2016, 2017 "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 <pthread.h>
#include <json-c/json.h>
#define AFB_BINDING_VERSION 2
#include <afb/afb-binding.h>
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
struct event
{
struct event *next;
struct afb_event event;
char tag[1];
};
static struct event *events = 0;
/* searchs the event of tag */
static 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 */
static 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 */
static 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(name);
if (!e->event.closure) { free(e); return -1; }
/* link */
e->next = events;
events = e;
return 0;
}
static int event_subscribe(afb_req request, const char *tag)
{
struct event *e;
e = event_get(tag);
return e ? afb_req_subscribe(request, e->event) : -1;
}
static int event_unsubscribe(afb_req request, const char *tag)
{
struct event *e;
e = event_get(tag);
return e ? afb_req_unsubscribe(request, e->event) : -1;
}
static 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;
}
static int event_broadcast(struct json_object *args, const char *tag)
{
struct event *e;
e = event_get(tag);
return e ? afb_event_broadcast(e->event, json_object_get(args)) : -1;
}
// Sample Generic Ping Debug API
static void ping(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));
}
static void pingSample (afb_req request)
{
ping(request, json_object_new_string ("Some String"), "pingSample");
}
static void pingFail (afb_req request)
{
afb_req_fail(request, "failed", "Ping Binder Daemon fails");
}
static void pingNull (afb_req request)
{
ping(request, NULL, "pingNull");
}
static void pingBug (afb_req request)
{
ping((afb_req){NULL,NULL}, NULL, "pingBug");
}
static void pingEvent(afb_req request)
{
json_object *query = afb_req_json(request);
afb_daemon_broadcast_event("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/
static void pingJson (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");
}
static void subcallcb (void *prequest, int status, json_object *object)
{
afb_req request = afb_req_unstore(prequest);
if (status < 0)
afb_req_fail(request, "failed", json_object_to_json_string(object));
else
afb_req_success(request, json_object_get(object), NULL);
afb_req_unref(request);
}
static void subcall (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));
}
static void subcallreqcb (void *prequest, int status, json_object *object, afb_req request)
{
if (status < 0)
afb_req_fail(request, "failed", json_object_to_json_string(object));
else
afb_req_success(request, json_object_get(object), NULL);
}
static void subcallreq (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_req(request, api, verb, object, subcallreqcb, NULL);
}
static void subcallsync (afb_req request)
{
int rc;
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 *result, *object = api && verb && args ? json_tokener_parse(args) : NULL;
if (object == NULL)
afb_req_fail(request, "failed", "bad arguments");
else {
rc = afb_req_subcall_sync(request, api, verb, object, &result);
if (rc >= 0)
afb_req_success(request, result, NULL);
else {
afb_req_fail(request, "failed", json_object_to_json_string(result));
json_object_put(result);
}
}
}
static void eventadd (afb_req request)
{
const char *tag = afb_req_value(request, "tag");
const char *name = afb_req_value(request, "name");
pthread_mutex_lock(&mutex);
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);
pthread_mutex_unlock(&mutex);
}
static void eventdel (afb_req request)
{
const char *tag = afb_req_value(request, "tag");
pthread_mutex_lock(&mutex);
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);
pthread_mutex_unlock(&mutex);
}
static void eventsub (afb_req request)
{
const char *tag = afb_req_value(request, "tag");
pthread_mutex_lock(&mutex);
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);
pthread_mutex_unlock(&mutex);
}
static void eventunsub (afb_req request)
{
const char *tag = afb_req_value(request, "tag");
pthread_mutex_lock(&mutex);
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);
pthread_mutex_unlock(&mutex);
}
static void eventpush (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;
pthread_mutex_lock(&mutex);
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);
pthread_mutex_unlock(&mutex);
json_object_put(object);
}
static void callcb (void *prequest, int status, json_object *object)
{
afb_req request = afb_req_unstore(prequest);
if (status < 0)
afb_req_fail(request, "failed", json_object_to_json_string(object));
else
afb_req_success(request, json_object_get(object), NULL);
afb_req_unref(request);
}
static void call (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_service_call(api, verb, object, callcb, afb_req_store(request));
}
static void callsync (afb_req request)
{
int rc;
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 *result, *object = api && verb && args ? json_tokener_parse(args) : NULL;
if (object == NULL)
afb_req_fail(request, "failed", "bad arguments");
else {
rc = afb_service_call_sync(api, verb, object, &result);
if (rc >= 0)
afb_req_success(request, result, NULL);
else {
afb_req_fail(request, "failed", json_object_to_json_string(result));
json_object_put(result);
}
}
}
static void verbose (afb_req request)
{
int level = 5;
json_object *query = afb_req_json(request), *l;
if (json_object_is_type(query,json_type_int))
level = json_object_get_int(query);
else if (json_object_object_get_ex(query, "level", &l) && json_object_is_type(l, json_type_int))
level = json_object_get_int(l);
if (!json_object_object_get_ex(query,"message",&l))
l = query;
AFB_REQ_VERBOSE(request, level, "verbose called for %s", json_object_get_string(l));
afb_req_success(request, NULL, NULL);
}
static void exitnow (afb_req request)
{
int code = 0;
json_object *query = afb_req_json(request), *l;
if (json_object_is_type(query,json_type_int))
code = json_object_get_int(query);
else if (json_object_object_get_ex(query, "code", &l) && json_object_is_type(l, json_type_int))
code = json_object_get_int(l);
if (!json_object_object_get_ex(query,"reason",&l))
l = NULL;
AFB_REQ_NOTICE(request, "in phase of exiting with code %d, reason: %s", code, l ? json_object_get_string(l) : "unknown");
afb_req_success(request, NULL, NULL);
exit(code);
}
static void broadcast(afb_req request)
{
const char *tag = afb_req_value(request, "tag");
const char *name = afb_req_value(request, "name");
const char *data = afb_req_value(request, "data");
json_object *object = data ? json_tokener_parse(data) : NULL;
if (tag != NULL) {
pthread_mutex_lock(&mutex);
if (0 > event_broadcast(object, tag))
afb_req_fail(request, "failed", "broadcast error");
else
afb_req_success(request, NULL, NULL);
pthread_mutex_unlock(&mutex);
} else if (name != NULL) {
if (0 > afb_daemon_broadcast_event(name, object))
afb_req_fail(request, "failed", "broadcast error");
else
afb_req_success(request, NULL, NULL);
} else {
afb_req_fail(request, "failed", "bad arguments");
}
json_object_put(object);
}
static void hasperm (afb_req request)
{
const char *perm = afb_req_value(request, "perm");
if (afb_req_has_permission(request, perm))
afb_req_success_f(request, NULL, "permission %s granted", perm?:"(null)");
else
afb_req_fail_f(request, "not-granted", "permission %s NOT granted", perm?:"(null)");
}
static void appid (afb_req request)
{
char *aid = afb_req_get_application_id(request);
afb_req_success_f(request, aid ? json_object_new_string(aid) : NULL, "application is %s", aid?:"?");
free(aid);
}
static int preinit()
{
AFB_NOTICE("hello binding comes to live");
return 0;
}
static int init()
{
AFB_NOTICE("hello binding starting");
return 0;
}
static void onevent(const char *event, struct json_object *object)
{
AFB_NOTICE("received event %s(%s)", event, json_object_to_json_string(object));
}
// NOTE: this sample does not use session to keep test a basic as possible
// in real application most APIs should be protected with AFB_SESSION_CHECK
static const afb_verb_v2 verbs[]= {
{ .verb="ping", .callback=pingSample },
{ .verb="pingfail", .callback=pingFail },
{ .verb="pingnull", .callback=pingNull },
{ .verb="pingbug", .callback=pingBug },
{ .verb="pingJson", .callback=pingJson },
{ .verb="pingevent", .callback=pingEvent },
{ .verb="subcall", .callback=subcall },
{ .verb="subcallreq", .callback=subcallreq },
{ .verb="subcallsync", .callback=subcallsync },
{ .verb="eventadd", .callback=eventadd },
{ .verb="eventdel", .callback=eventdel },
{ .verb="eventsub", .callback=eventsub },
{ .verb="eventunsub", .callback=eventunsub },
{ .verb="eventpush", .callback=eventpush },
{ .verb="call", .callback=call },
{ .verb="callsync", .callback=callsync },
{ .verb="verbose", .callback=verbose },
{ .verb="broadcast", .callback=broadcast },
{ .verb="hasperm", .callback=hasperm },
{ .verb="appid", .callback=appid },
{ .verb="exit", .callback=exitnow },
{ .verb=NULL}
};
const afb_binding_v2 afbBindingV2 = {
.api = "hello",
.specification = NULL,
.verbs = verbs,
.preinit = preinit,
.init = init,
.onevent = onevent
};
