[internal/logging] add logging lib

internal/logging.go

@@ -0,0 +1,63 @@
+package internal
+
+import (
+	"github.com/apsdehal/go-logger"
+	"fmt"
+	"os"
+)
+
+var Log *logger.Logger
+var documenterLoggers map[string]*logger.Logger
+var verbose bool
+
+var formatNormal string = "%{message}"
+var formatVerbose string = "%{time} %{level}: %{message}"
+var formatModuleNormal string = "%{module}: %{message}"
+var formatModuleVerbose string = "%{time} %{level} %{module}: %{message}"
+
+func InitLogger() error {
+	var err error
+	Log, err = logger.New("UsbDisconnect", 1, os.Stdout)
+
+	if err != nil {
+		return fmt.Errorf("Logger initialization error: %s", err)
+	}
+
+	documenterLoggers = make(map[string]*logger.Logger)
+	verbose = false
+	Log.SetLogLevel(logger.InfoLevel)
+
+	return nil
+}
+
+func LogDoc(documenter Documenter) *logger.Logger {
+	documenterLogger, ok := documenterLoggers[documenter.GetName()]
+
+	if !ok {
+		documenterLogger, _ = logger.New(documenter.GetName(), 1, os.Stdout)
+		documenterLoggers[documenter.GetName()] = documenterLogger
+	}
+
+	SetVerbose(verbose)
+	//documenterLogger.SetFormat("%{message}")
+
+	return documenterLogger
+}
+
+func SetVerbose(value bool) {
+	verbose = value
+	toggleVerbosity := func(l *logger.Logger, formatN string, formatV string) {
+			if value {
+			l.SetLogLevel(logger.DebugLevel)
+			l.SetFormat(formatV)
+		} else {
+			l.SetLogLevel(logger.InfoLevel)
+			l.SetFormat(formatN)
+		}
+	}
+
+	toggleVerbosity(Log, formatNormal, formatVerbose)
+	for _, documenterLogger := range documenterLoggers {
+		toggleVerbosity(documenterLogger, formatModuleNormal, formatModuleVerbose)
+	}
+}