X-Git-Url: https://gerrit.automotivelinux.org/gerrit/gitweb?a=blobdiff_plain;f=AFBClient.cpp;h=407aeac0ff7b8ad4a7c3e9fda3a63dd8e670c6ba;hb=b8ec6408f237065d6f87a23bcfe6c20ac56528bf;hp=2c200bcedf925634463cf151d0e92d4866c9c408;hpb=41215ddc3ab972d2d3b31a54576103be75a20f44;p=staging%2Fwindowmanager.git diff --git a/AFBClient.cpp b/AFBClient.cpp index 2c200bc..407aeac 100644 --- a/AFBClient.cpp +++ b/AFBClient.cpp @@ -1,76 +1,62 @@ #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 -}; +#include +#include +#include +#include +#include +#include +#include -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; - } +#define UNUSED(x) (void)(x) - /* 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; - } -} +namespace { -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); -} +constexpr const int token_maxlen = 20; +constexpr const char *const wmAPI = "winman"; -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); -} +#ifdef NDEBUG +#define TRACE() +#define TRACEN(N) +#else +#define CONCAT_(X, Y) X##Y +#define CONCAT(X, Y) CONCAT_(X, Y) -void AFBClient::deactivateSurface(const char *label) -{ -} +#define TRACE() \ + ScopeTrace __attribute__((unused)) CONCAT(trace_scope_, __LINE__)(__func__) +#define TRACEN(N) \ + ScopeTrace __attribute__((unused)) CONCAT(named_trace_scope_, __LINE__)(#N) -void AFBClient::endDraw(const char *label) -{ -} +struct ScopeTrace { + static int indent; + char const *f{}; + ScopeTrace(char const *func) : f(func) { + fprintf(stderr, "%*s%s -->\n", 2 * indent++, "", this->f); + } + ~ScopeTrace() { fprintf(stderr, "%*s%s <--\n", 2 * --indent, "", this->f); } +}; +int ScopeTrace::indent = 0; +#endif /* called when wsj1 receives a method invocation */ -void AFBClient::onCall(void *closure, afb_wsj1 *wsj1) -{ +void onCall(void *closure, const char *api, const char *verb, + struct afb_wsj1_msg *msg) { + TRACE(); + UNUSED(closure); 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); + rc = afb_wsj1_reply_error_s(msg, "\"unimplemented\"", nullptr); 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) -{ +void onEvent(void *closure, const char *event, afb_wsj1_msg *msg) { + TRACE(); + UNUSED(closure); 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)); @@ -78,56 +64,223 @@ void AFBClient::onEvent(void *closure, const char *event, afb_wsj1_msg *msg) } /* called when wsj1 hangsup */ -void AFBClient::onHangup(void *closure, afb_wsj1 *wsj1) -{ +void onHangup(void *closure, afb_wsj1 *wsj1) { + TRACE(); + UNUSED(closure); + UNUSED(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); +} // namespace + +AFBClient &AFBClient::instance() { + TRACE(); + static AFBClient obj; + return obj; } -/* makes a call */ -void AFBClient::call(const char *api, const char *verb, const char *object) -{ - static int num = 0; - char *key; - int rc; +AFBClient::AFBClient() : wsj1{}, itf{}, loop{} { + TRACE(); + itf.on_hangup = onHangup; + itf.on_call = onCall; + itf.on_event = onEvent; +} + +AFBClient::~AFBClient() { + TRACE(); + afb_wsj1_unref(wsj1); + 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; + } - /* allocates an id for the request */ - rc = asprintf(&key, "%d:%s/%s", ++num, api, verb); + /* 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) { + return sd_event_run(loop, timeout); +} + +int AFBClient::requestSurface(const char *label) { + TRACE(); + json_object *jp = json_object_new_object(); + json_object_object_add(jp, "drawing_name", json_object_new_string(label)); + int rc = -1; /* 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); + int rc2 = call("request_surface", jp, [&rc](bool ok, json_object *j) { + if (ok) { + int id = json_object_get_int(json_object_object_get(j, "response")); + char *buf; + asprintf(&buf, "%d", id); + 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"); + rc = -errno; + } else { + rc = 0; // Single point of success + } + } else { + fprintf( + stderr, "Could not get surface ID from WM: %s\n", + j ? json_object_to_json_string_ext(j, JSON_C_TO_STRING_PRETTY) + : "no-info"); + rc = -EINVAL; + } + }); + + return rc2 < 0 ? rc2 : rc; } -/* sends an event */ -void AFBClient::event(const char *event, const char *object) -{ - int rc; +int AFBClient::activateSurface(const char *label) { + TRACE(); + json_object *j = json_object_new_object(); + json_object_object_add(j, "drawing_name", json_object_new_string(label)); + return call("activate_surface", j, [](bool ok, json_object *j) { + if (!ok) { + fprintf( + stderr, "API Call activate_surface() failed: %s\n", + j ? json_object_to_json_string_ext(j, JSON_C_TO_STRING_PRETTY) + : "no-info"); + } + }); +} - rc = afb_wsj1_send_event_s(wsj1, event, object); - if (rc < 0) - fprintf(stderr, "sending !%s(%s) failed: %m\n", event, object); +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)); + return call("deactivate_surface", j, [](bool ok, json_object *j) { + if (!ok) { + fprintf( + stderr, "API Call deactivate_surface() failed: %s\n", + j ? json_object_to_json_string_ext(j, JSON_C_TO_STRING_PRETTY) + : "no-info"); + } + }); +} + +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)); + return call("enddraw", j, [](bool ok, json_object *j) { + if (!ok) { + fprintf( + stderr, "API Call endDraw() failed: %s\n", + j ? json_object_to_json_string_ext(j, JSON_C_TO_STRING_PRETTY) + : "no-info"); + } + }); +} + +/// object will be json_object_put +int AFBClient::call(const char *verb, json_object *object, + std::function onReply) { + TRACE(); + + // We need to wrap the actual onReply call once in order to + // *look* like a normal functions pointer (std::functions<> + // with captures cannot convert to function pointers). + // Alternatively we could setup a local struct and use it as + // closure, but I think it is cleaner this way. + int call_rc = 0; + bool returned = false; + std::function wrappedOnReply = + [&returned, &call_rc, &onReply](bool ok, json_object *j) { + TRACEN(wrappedOnReply); + call_rc = ok ? 0 : -EINVAL; + // We know it failed, but there may be an explanation in the + // json object. + onReply(ok, j); + returned = true; + }; + + // make the actual call, use wrappedOnReply as closure + int rc = afb_wsj1_call_j( + wsj1, wmAPI, verb, object, + [](void *closure, afb_wsj1_msg *msg) { + TRACEN(callClosure); + auto *onReply = + reinterpret_cast *>( + closure); + (*onReply)(!!afb_wsj1_msg_is_reply_ok(msg), + afb_wsj1_msg_object_j(msg)); + }, + &wrappedOnReply); + + if (rc < 0) { + fprintf( + stderr, "calling %s/%s(%s) failed: %m\n", wmAPI, verb, + json_object_to_json_string_ext(object, JSON_C_TO_STRING_PRETTY)); + // Call the reply handler regardless with a NULL json_object* + onReply(false, nullptr); + } else { + // We need to dispatch until "returned" got set, this is necessary + // if events get triggered by the call (and would be dispatched before + // the actual call-reply). + while (!returned) { + dispatch(-1); + } + + // return the actual API call result + rc = call_rc; + } + + return rc; } -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); +void AFBClient::set_event_handler(enum EventType et, + std::function func) { + UNUSED(et); + UNUSED(func); + TRACE(); + // XXX todo }