From 706ac9a0abe3502b160c9ebf3bfcd2401106f4b6 Mon Sep 17 00:00:00 2001
From: Maciek Borzecki <maciek.borzecki@gmail.com>
Date: Sat, 20 Jan 2018 20:40:09 +0100
Subject: [PATCH] logger: simple logger

---
 logger/context.go | 22 ++++++++++++++++++++++
 logger/logger.go  | 27 +++++++++++++++++++++++++++
 logger/logrus.go  | 24 ++++++++++++++++++++++++
 3 files changed, 73 insertions(+)
 create mode 100644 logger/context.go
 create mode 100644 logger/logger.go
 create mode 100644 logger/logrus.go

diff --git a/logger/context.go b/logger/context.go
new file mode 100644
index 0000000..545bd08
--- /dev/null
+++ b/logger/context.go
@@ -0,0 +1,22 @@
+package logger
+
+import (
+	"context"
+)
+
+type loggerKeyType int
+
+const (
+	loggerContextKey loggerKeyType = 1
+)
+
+func FromContext(ctx context.Context) Logger {
+	if logger, _ := ctx.Value(loggerContextKey).(Logger); logger != nil {
+		return logger
+	}
+	return New()
+}
+
+func WithContext(ctx context.Context, logger Logger) context.Context {
+	return context.WithValue(ctx, loggerContextKey, logger)
+}
diff --git a/logger/logger.go b/logger/logger.go
new file mode 100644
index 0000000..7e889e1
--- /dev/null
+++ b/logger/logger.go
@@ -0,0 +1,27 @@
+package logger
+
+type Logger interface {
+	Debug(args ...interface{})
+	Debugf(format string, args ...interface{})
+	Debugln(args ...interface{})
+
+	Info(args ...interface{})
+	Infof(format string, args ...interface{})
+	Infoln(args ...interface{})
+
+	Error(args ...interface{})
+	Errorf(format string, args ...interface{})
+	Errorln(args ...interface{})
+
+	Warning(args ...interface{})
+	Warningf(format string, args ...interface{})
+	Warningln(args ...interface{})
+
+	Panic(args ...interface{})
+	Panicf(format string, args ...interface{})
+	Panicln(args ...interface{})
+
+	Print(args ...interface{})
+	Printf(format string, args ...interface{})
+	Println(args ...interface{})
+}
diff --git a/logger/logrus.go b/logger/logrus.go
new file mode 100644
index 0000000..b97cfeb
--- /dev/null
+++ b/logger/logrus.go
@@ -0,0 +1,24 @@
+package logger
+
+import (
+	"os"
+
+	"github.com/Sirupsen/logrus"
+)
+
+var log *logrus.Logger
+
+func init() {
+	log = &logrus.Logger{
+		Out: os.Stderr,
+		Formatter: &logrus.TextFormatter{
+			FullTimestamp: true,
+		},
+		Hooks: make(logrus.LevelHooks),
+		Level: logrus.DebugLevel,
+	}
+}
+
+func New() Logger {
+	return log
+}