hook with default fields

hooks.go

@@ -0,0 +1,35 @@
+package hooks
+
+import (
+	"github.com/sirupsen/logrus"
+)
+
+// DefaultFieldsHook represents hook with fields
+type DefaultFieldsHook struct {
+	defaultFields map[string]interface{}
+	levels        []logrus.Level
+}
+
+func (dfh DefaultFieldsHook) AddDefaultField(key string, val interface{}) {
+	dfh.defaultFields[key] = val
+}
+
+func (dfh DefaultFieldsHook) Levels() []logrus.Level {
+	return dfh.levels
+}
+
+func (dfh DefaultFieldsHook) Fire(entry *logrus.Entry) error {
+	for key, val := range dfh.defaultFields {
+		entry.Data[key] = val
+	}
+	return nil
+}
+
+func NewDefaultFieldsHook(levels []logrus.Level) *DefaultFieldsHook {
+	fields := map[string]interface{}{}
+	return &DefaultFieldsHook{
+		defaultFields: fields,
+		levels:        levels,
+	}
+
+}