initial

config/helper.go

@@ -0,0 +1,52 @@
+package config
+
+import (
+	log "github.com/sirupsen/logrus"
+	"os"
+	"strconv"
+	"time"
+)
+
+func getEnv(key, fallback string) string {
+	if value, ok := os.LookupEnv(key); ok {
+		return value
+	}
+	return fallback
+}
+
+func getEnvSeconds(key string, fallback int) time.Duration {
+	if value, ok := os.LookupEnv(key); ok {
+		num, err := strconv.Atoi(value)
+		if err != nil {
+			log.Printf("Error converting %v to int, using default value - 60 seconds", key)
+			return time.Duration(60) * time.Second
+		}
+
+		return time.Duration(num) * time.Second
+	}
+	return time.Duration(fallback) * time.Second
+}
+
+func getEnvUint(key string, fallback uint) uint {
+	var def uint = 100
+	if value, ok := os.LookupEnv(key); ok {
+		num, err := strconv.ParseUint(value, 10, 64)
+		if err != nil {
+			log.Printf("Error converting %v to uint, using default value - %v", key, def)
+			return def
+		}
+		return uint(num)
+	}
+	return fallback
+}
+
+func getEnvPort(key string, fallback uint16) uint16 {
+	if value, ok := os.LookupEnv(key); ok {
+		num, err := strconv.ParseUint(value, 10, 16)
+		if err != nil {
+			return fallback
+		}
+		return uint16(num)
+	}
+	return fallback
+}