Add initial project structure with Go Fiber framework and environment configuration

1 files changed, 97 insertions, 0 deletions

diff --git a/utils/env/functions.go b/utils/env/functions.go
new file mode 100644
index 0000000..de03793
--- /dev/null
+++ b/utils/env/functions.go
@@ -0,0 +1,97 @@
+package env
+
+import (
+	"os"
+	"reflect"
+	"strconv"
+	"strings"
+	"time"
+)
+
+func getEnv(key, defaultVal string) string {
+	if value := os.Getenv(key); value != "" {
+		return value
+	}
+	return defaultVal
+}
+
+func getEnvBool(key string, defaultVal bool) bool {
+	if value := os.Getenv(key); value != "" {
+		if parsed, err := strconv.ParseBool(value); err == nil {
+			return parsed
+		}
+	}
+	return defaultVal
+}
+
+func getEnvDuration(key string, defaultVal time.Duration) time.Duration {
+	if value := os.Getenv(key); value != "" {
+		if parsed, err := time.ParseDuration(value); err == nil {
+			return parsed
+		}
+	}
+	return defaultVal
+}
+
+func getEnvInt(key string, defaultVal int64) int64 {
+	if value := os.Getenv(key); value != "" {
+		if parsed, err := strconv.ParseInt(value, 10, 64); err == nil {
+			return parsed
+		}
+	}
+	return defaultVal
+}
+
+func getEnvFloat(key string, defaultVal float64) float64 {
+	if value := os.Getenv(key); value != "" {
+		if parsed, err := strconv.ParseFloat(value, 64); err == nil {
+			return parsed
+		}
+	}
+	return defaultVal
+}
+
+func getEnvStringSlice(key string, defaultVal []string) []string {
+	if value := os.Getenv(key); value != "" {
+		parts := strings.Split(value, ",")
+		result := make([]string, 0, len(parts))
+		for _, part := range parts {
+			trimmed := strings.TrimSpace(part)
+			if trimmed != "" {
+				result = append(result, trimmed)
+			}
+		}
+		return result
+	}
+	return defaultVal
+}
+
+func Defaults[T any](config *T) *T {
+	v := reflect.ValueOf(config)
+	if v.Kind() != reflect.Ptr || v.Elem().Kind() != reflect.Struct {
+		return config
+	}
+
+	elem := v.Elem()
+	t := elem.Type()
+	newStruct := reflect.New(t)
+	newElem := newStruct.Elem()
+
+	for i := range elem.NumField() {
+		field := newElem.Field(i)
+		fieldType := t.Field(i)
+
+		if !field.CanSet() {
+			continue
+		}
+
+		defaultVal := fieldType.Tag.Get("default")
+		if defaultVal == "" {
+			continue
+		}
+
+		setFieldDefault(field, defaultVal)
+	}
+
+	return newStruct.Interface().(*T)
+}