add AFBClient

Signed-off-by: Marcus Fritzsch <marcus_fritzsch@mentor.com>

2 files changed, 167 insertions, 0 deletions

diff --git a/AFBClient.cpp b/AFBClient.cpp
new file mode 100644
index 0000000..2c200bc
--- /dev/null
+++ b/AFBClient.cpp
@@ -0,0 +1,133 @@
+#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);
+}
diff --git a/AFBClient.h b/AFBClient.h
new file mode 100644
index 0000000..d93817b
--- /dev/null
+++ b/AFBClient.h
@@ -0,0 +1,34 @@
+#ifndef AFBCLIENT_H
+#define AFBCLIENT_H
+
+#include <systemd/sd-event.h>
+#include <json-c/json.h>
+
+#include "afb-wsj1.h"
+#include "afb-ws-client.h"
+
+class AFBClient
+{
+public:
+    AFBClient();
+    void requestSurface(const char *label);
+    void activateSurface(const char *label);
+    void deactivateSurface(const char *label);
+    void endDraw(const char *label);
+
+private:
+    void call(const char *api, const char *verb, const char *object);
+    void emitSignalOrCall(const char *api, const char *verb, const char *object);
+    void event(const char *event, const char *object);
+    void onCall(void *closure, struct afb_wsj1 *wsj1);
+    void onEvent(void *closure, const char *event, struct afb_wsj1_msg *msg);
+    void onHangup(void *closure, struct afb_wsj1 *wsj1);
+    void onReply(void *closure, struct afb_wsj1_msg *msg);
+
+    struct afb_wsj1 *wsj1;
+    sd_event *loop;
+    const char *wmURI = "ws://localhost:1700/api?wm";
+    const char *wmAPI = "winman";
+};
+
+#endif // AFBCLIENT_H