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#include "AFBClient.h"
/* the callback interface for wsj1 */
static struct afb_wsj1_itf itf =
{
.on_hangup = AFBClient::onHangup,
.on_call = AFBClient::onCall,
.on_event = AFBClient::onEvent
};
AFBClient::AFBClient()
{
/* get the default event loop */
int rc = sd_event_default(&loop);
if (rc < 0) {
fprintf(stderr, "Connection to default event loop failed: %s\n", strerror(-rc));
return 1;
}
/* connect the websocket wsj1 to the uri given by the first argument */
wsj1 = afb_ws_client_connect_wsj1(loop, wmURI, &itf, NULL);
if (wsj1 == NULL) {
fprintf(stderr, "Connection to %s failed: %m\n", wmURI);
return 1;
}
}
void AFBClient::requestSurface(const char *label)
{
const char functionParamName[] = "{\"drawing_name\":\"";
char *parameter = (char *)malloc(strlen(functionParamName) + strlen(label) + 3);
strcpy(parameter, functionParamName);
strcat(parameter, label);
strcat(parameter, "\"}");
printf("requestSurface(%s): %s\n", label, parameter);
call(wmAPI, "request_surface", parameter);
}
void AFBClient::activateSurface(const char *label)
{
const char functionParamName[] = "{\"drawing_name\":\"";
char *parameter = (char *)malloc(strlen(functionParamName) + strlen(label) + 3);
strcpy(parameter, functionParamName);
strcat(parameter, label);
strcat(parameter, "\"}");
printf("activateSurface(%s): %s\n", label, parameter);
call(wmAPI, "activate_surface", parameter);
}
void AFBClient::deactivateSurface(const char *label)
{
}
void AFBClient::endDraw(const char *label)
{
}
/* called when wsj1 receives a method invocation */
void AFBClient::onCall(void *closure, afb_wsj1 *wsj1)
{
int rc;
printf("ON-CALL %s/%s:\n%s\n", api, verb,
json_object_to_json_string_ext(afb_wsj1_msg_object_j(msg),
JSON_C_TO_STRING_PRETTY));
fflush(stdout);
rc = afb_wsj1_reply_error_s(msg, "\"unimplemented\"", NULL);
if (rc < 0)
fprintf(stderr, "replying failed: %m\n");
}
/* called when wsj1 receives an event */
void AFBClient::onEvent(void *closure, const char *event, afb_wsj1_msg *msg)
{
printf("ON-EVENT %s:\n%s\n", event,
json_object_to_json_string_ext(afb_wsj1_msg_object_j(msg),
JSON_C_TO_STRING_PRETTY));
fflush(stdout);
}
/* called when wsj1 hangsup */
void AFBClient::onHangup(void *closure, afb_wsj1 *wsj1)
{
printf("ON-HANGUP\n");
fflush(stdout);
exit(0);
}
/* called when wsj1 receives a reply */
void AFBClient::onReply(void *closure, afb_wsj1_msg *msg)
{
printf("ON-REPLY %s: %s\n%s\n", (char*)closure,
afb_wsj1_msg_is_reply_ok(msg) ? "OK" : "ERROR",
json_object_to_json_string_ext(afb_wsj1_msg_object_j(msg),
JSON_C_TO_STRING_PRETTY));
fflush(stdout);
free(closure);
}
/* makes a call */
void AFBClient::call(const char *api, const char *verb, const char *object)
{
static int num = 0;
char *key;
int rc;
/* allocates an id for the request */
rc = asprintf(&key, "%d:%s/%s", ++num, api, verb);
/* send the request */
rc = afb_wsj1_call_s(wsj1, api, verb, object, AFBClient::onReply, key);
if (rc < 0)
fprintf(stderr, "calling %s/%s(%s) failed: %m\n", api, verb, object);
}
/* sends an event */
void AFBClient::event(const char *event, const char *object)
{
int rc;
rc = afb_wsj1_send_event_s(wsj1, event, object);
if (rc < 0)
fprintf(stderr, "sending !%s(%s) failed: %m\n", event, object);
}
void AFBClient::emitSignalOrCall(const char *api, const char *verb, const char *object)
{
if (object == NULL || object[0] == 0)
object = "null";
if (api[0] == '!' && api[1] == 0)
event(verb, object);
else
call(api, verb, object);
}
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