first commit: one-api base code + SAAS plan document

common/env/helper.go

@@ -0,0 +1,42 @@
+package env
+
+import (
+	"os"
+	"strconv"
+)
+
+func Bool(env string, defaultValue bool) bool {
+	if env == "" || os.Getenv(env) == "" {
+		return defaultValue
+	}
+	return os.Getenv(env) == "true"
+}
+
+func Int(env string, defaultValue int) int {
+	if env == "" || os.Getenv(env) == "" {
+		return defaultValue
+	}
+	num, err := strconv.Atoi(os.Getenv(env))
+	if err != nil {
+		return defaultValue
+	}
+	return num
+}
+
+func Float64(env string, defaultValue float64) float64 {
+	if env == "" || os.Getenv(env) == "" {
+		return defaultValue
+	}
+	num, err := strconv.ParseFloat(os.Getenv(env), 64)
+	if err != nil {
+		return defaultValue
+	}
+	return num
+}
+
+func String(env string, defaultValue string) string {
+	if env == "" || os.Getenv(env) == "" {
+		return defaultValue
+	}
+	return os.Getenv(env)
+}