Merge afb-client

[src/app-framework-demo.git] / afb-client / app / etc / _Trace.js

diff --git a/afb-client/app/etc/_Trace.js b/afb-client/app/etc/_Trace.js
new file mode 100644 (file)
index 0000000..79ef4f5
--- /dev/null
+++ b/afb-client/app/etc/_Trace.js
@@ -0,0 +1,55 @@
+/* 
+ * Copyright 2014 Fulup Ar Foll
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+var util       = require("util");
+var path       = require("path");
+var config= require('./_Config');
+
+function TracePoint () {
+        var saved = Error.prepareStackTrace;                           // save default prepareStack function
+        Error.prepareStackTrace = function(_, stack){ return stack; }; // overload err stack handling
+        Error.captureStackTrace(this, arguments.callee);               // request a stack
+        this.trace = this.stack;                                       // effectively build trace
+        Error.prepareStackTrace = saved;                               // restore original nodejs function  
+}
+
+// ------- Public Methods --------------
+var dbgLevel = function(target, level, format) {  //+ arguments
+    // try to get debugLevel from calling object or global config
+    if (target && target.dbgLevel)  dbgLevel = target.dbgLevel;
+    else dbgLevel = config.DBG_LVL || 1;
+    
+    if (dbgLevel >= level ) {
+
+        var args = [].slice.call(arguments, 2); // copy argument in a real array leaving out level
+        var message = util.format.apply(null, args);
+        
+        var trace = new TracePoint().trace;
+        var info = {
+            fullpath : trace[1].getFileName(),
+            linenum  : trace[1].getLineNumber(),
+            basename : path.basename (trace[1].getFileName())
+        };
+        
+        if (dbgLevel >= 5) {
+            console.log("%s:%d", info.fullpath, info.linenum);
+            console.log("\t[%d] %j", dbgLevel, message);
+        }
+        else console.log("--%d-- [%s:%d] -- %j", dbgLevel, info.basename, info.linenum, message);
+    }
+};
+
+module.exports = dbgLevel;