implement global.__nativeLog function

1 files changed, 48 insertions, 2 deletions

diff --git a/taler_wallet_core_lib.c b/taler_wallet_core_lib.c
index 072b6ac..07c8c56 100644
--- a/taler_wallet_core_lib.c
+++ b/taler_wallet_core_lib.c
@@ -30,6 +30,8 @@ extern const uint32_t qjsc_prelude_size;
 extern const uint8_t qjsc_wallet_core[];
 extern const uint32_t qjsc_wallet_core_size;
 
+static JSClassID js_wallet_instance_handle_id;
+
 struct HostMessage {
     struct list_head link;
     char *data;
@@ -47,6 +49,9 @@ struct TALER_WALLET_Instance
 
     TALER_WALLET_MessageHandlerFn handler_f;
     void *handler_cls;
+
+    TALER_WALLET_LogHandlerFn log_handler_f;
+    void *log_handler_cls;
 };
 
 
@@ -94,10 +99,11 @@ TALER_WALLET_set_message_handler(struct TALER_WALLET_Instance *twi,
 
 void
 TALER_WALLET_set_log_handler(struct TALER_WALLET_Instance *twi,
-                             TALER_WALLET_LogHandlerFn *handler_f,
+                             TALER_WALLET_LogHandlerFn handler_f,
                              void *handler_cls)
 {
-  // FIXME: Implement!
+    twi->log_handler_cls = handler_cls;
+    twi->log_handler_f = handler_f;
 }
 
 
@@ -137,6 +143,30 @@ TALER_WALLET_create(void)
     return wh;
 }
 
+static JSValue js_native_log(JSContext *ctx,
+                             JSValueConst this_obj,
+                             int argc, JSValueConst *argv,
+                             int magic, JSValue *func_data)
+{
+  struct TALER_WALLET_Instance *wh;
+  const char *tag = NULL;
+  const char *msg = NULL;
+  uint32_t level = 0;
+  wh = JS_GetOpaque(func_data[0], js_wallet_instance_handle_id);
+  if (NULL != wh->log_handler_f) {
+    JS_ToUint32(ctx, &level, argv[0]);
+    tag = JS_ToCString(ctx, argv[1]);
+    msg = JS_ToCString(ctx, argv[2]);
+    wh->log_handler_f(wh->log_handler_cls,
+                      level,
+                      tag,
+                      msg);
+  }
+  JS_FreeCString(ctx, tag);
+  JS_FreeCString(ctx, msg);
+  return JS_UNDEFINED;
+}
+
 
 static void *
 run(void *cls)
@@ -155,12 +185,27 @@ run(void *cls)
         return NULL;
     }
 
+    JS_NewClassID(&js_wallet_instance_handle_id);
+
 
     JS_SetHostPromiseRejectionTracker(wh->rt, js_std_promise_rejection_tracker,
                                           NULL);
 
     js_std_add_helpers(wh->ctx, 0, NULL);
 
+    // install native log handler
+    if (NULL != wh->log_handler_f) {
+      JSValue global_obj;
+      JSValue data;
+
+      data = JS_NewObjectClass(wh->ctx, js_wallet_instance_handle_id);
+      JS_SetOpaque(data, wh);
+      global_obj = JS_GetGlobalObject(wh->ctx);
+      // We could also try to add this to "os" or "tart", but we are lazy.
+      JS_SetPropertyStr(wh->ctx, global_obj, "__nativeLog",
+                        JS_NewCFunctionData(wh->ctx, js_native_log, 3, 0, 1, &data));
+    }
+
     fprintf(stderr, "qtart: loading JS code\n");
     js_std_eval_binary(wh->ctx, qjsc_prelude, qjsc_prelude_size, 0);
     js_std_eval_binary(wh->ctx, qjsc_wallet_core, qjsc_wallet_core_size, 0);
@@ -168,6 +213,7 @@ run(void *cls)
 
     js_os_set_host_message_handler(wh->ctx, wallet_host_message_handler, wh);
 
+
     pthread_mutex_unlock(&wh->handle_mutex);
 
     eval_buf(wh->ctx, "installNativeWalletListener()", "<talerwalletcore>");