+} // namespace
+
+AFBClient &AFBClient::instance() {
+ TRACE();
+ static AFBClient obj;
+ return obj;
+}
+
+AFBClient::AFBClient() : wsj1{}, itf{}, loop{} {
+ TRACE();
+ ///* itinializing the callback interface for wsj1 */
+ itf.on_hangup = onHangup;
+ itf.on_call = onCall;
+ itf.on_event = onEvent;
+}
+
+AFBClient::~AFBClient() {
+ TRACE();
+ sd_event_unref(loop);
+ loop = nullptr;
+}
+
+int AFBClient::init(int port, char const *token) {
+ TRACE();
+ char *uribuf = nullptr;
+ int rc = -1;
+
+ if (!token || strlen(token) > token_maxlen) {
+ fprintf(stderr, "Token is invalid\n");
+ rc = -EINVAL;
+ goto fail;
+ }
+
+ for (char const *p = token; *p; p++) {
+ if (!isalnum(*p)) {
+ fprintf(stderr, "Token is invalid\n");
+ rc = -EINVAL;
+ goto fail;
+ }
+ }
+
+ if (port < 1 && port > 0xffff) {
+ fprintf(stderr, "Port is invalid\n");
+ rc = -EINVAL;
+ goto fail;
+ }
+
+ /* get the default event loop */
+ rc = sd_event_default(&loop);
+ if (rc < 0) {
+ fprintf(stderr, "Connection to default event loop failed: %s\n",
+ strerror(-rc));
+ goto fail;
+ }
+
+ asprintf(&uribuf, "ws://localhost:%d/api?token=%s", port, token);
+
+ /* connect the websocket wsj1 to the uri given by the first argument */
+ wsj1 = afb_ws_client_connect_wsj1(loop, uribuf, &itf, nullptr);
+ if (wsj1 == nullptr) {
+ sd_event_unref(loop);
+ fprintf(stderr, "Connection to %s failed: %m\n", uribuf);
+ rc = -errno;
+ goto fail;
+ }
+
+ return 0;
+
+fail:
+ return rc;
+}
+
+int AFBClient::dispatch(uint64_t timeout) {
+ TRACE();
+ return sd_event_run(loop, timeout);
+}
+
+int AFBClient::requestSurface(const char *label) {
+ TRACE();
+ constexpr char const *verb = "request_surface";
+
+ json_object *jp = json_object_new_object();
+ json_object_object_add(jp, "drawing_name", json_object_new_string(label));
+
+ // std::experimental::optional look-alike
+ struct optional {
+ int value;
+ bool is_not_set;
+ };
+
+ constexpr struct optional const nullopt = {0, true};
+ auto id = nullopt;
+
+ /* send the request */
+ int rc = afb_wsj1_call_j(
+ wsj1, wmAPI, verb, jp,
+ [](void *closure, afb_wsj1_msg *msg) {
+ if (afb_wsj1_msg_is_reply_ok(msg)) {
+ int id = json_object_get_int(json_object_object_get(
+ afb_wsj1_msg_object_j(msg), "response"));
+ auto oid = (optional *)closure;
+ *oid = optional{id};
+ } else
+ fprintf(stderr, "wrong request surface reply received!\n");
+ },
+ (void *)&id);
+
+ if (rc < 0) {
+ fprintf(stderr, "calling %s/%s(%s) failed: %m\n", wmAPI, verb,
+ json_object_to_json_string(jp));
+ } else {
+ // Lets make this call sync here...
+ dispatch(-1);
+
+ if (!id.is_not_set) {
+ char *buf;
+ asprintf(&buf, "%d", id.value);
+ printf("setenv(\"QT_IVI_SURFACE_ID\", %s, 1)\n", buf);
+ if (setenv("QT_IVI_SURFACE_ID", buf, 1) != 0) {
+ fprintf(stderr, "putenv failed: %m\n");
+ } else {
+ rc = 0; // Single point of success
+ }
+ } else {
+ fprintf(stderr, "Could not get surface ID from WM\n");
+ rc = -EINVAL;
+ }
+ }
+
+ return rc;
+}
+
+int AFBClient::activateSurface(const char *label) {
+ TRACE();
+
+ const char begin[] = "{\"drawing_name\":\"";
+ const char end[] = "\"}";
+ const char verb[] = "activate_surface";
+ char *parameter =
+ (char *)malloc(strlen(begin) + strlen(label) + strlen(end) + 1);
+ strcpy(parameter, begin);
+ strcat(parameter, label);
+ strcat(parameter, end);
+ call(wmAPI, verb, parameter);
+
+ // Sync this one too
+ dispatch(-1);
+
+ return 0;
+}
+
+int AFBClient::deactivateSurface(const char *label) {
+ TRACE();
+ json_object *j = json_object_new_object();
+ json_object_object_add(j, "drawing_name", json_object_new_string(label));
+ call(wmAPI, "deactivate_surface", json_object_to_json_string(j));
+ json_object_put(j);
+ dispatch(-1);
+ return 0;
+}
+
+int AFBClient::endDraw(const char *label) {
+ TRACE();
+ json_object *j = json_object_new_object();
+ json_object_object_add(j, "drawing_name", json_object_new_string(label));
+ call(wmAPI, "enddraw", json_object_to_json_string(j));
+ json_object_put(j);
+ dispatch(-1);
+ return 0;