first commit

env.go

@@ -0,0 +1,62 @@
+package main
+
+import (
+	"log/slog"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+)
+
+func getEnvLogLevel(key string, fallback slog.Level) slog.Level {
+	if value, ok := os.LookupEnv(key); ok {
+		switch strings.ToUpper(value) {
+		case "DEBUG":
+			return slog.LevelDebug
+		case "INFO":
+			return slog.LevelInfo
+		case "WARN", "WARNING":
+			return slog.LevelWarn
+		case "ERROR", "ERR":
+			return slog.LevelError
+		}
+	}
+	return fallback
+}
+
+func getEnvDuration(key string, fallback time.Duration) time.Duration {
+	if value, ok := os.LookupEnv(key); ok {
+		if duration, err := time.ParseDuration(value); err == nil {
+			return duration
+		}
+	}
+	return fallback
+}
+
+func getEnvStringSlice(key string, fallback []string) []string {
+	if value, ok := os.LookupEnv(key); ok {
+		if value == "" {
+			return []string{}
+		}
+		return strings.Split(value, ",")
+	}
+	return fallback
+}
+
+func getEnvInt(key string, fallback int) int {
+	if value, ok := os.LookupEnv(key); ok {
+		if i, err := strconv.Atoi(value); err == nil {
+			return i
+		}
+	}
+	return fallback
+}
+
+func getEnvInt64(key string, fallback int64) int64 {
+	if value, ok := os.LookupEnv(key); ok {
+		if i, err := strconv.ParseInt(value, 10, 64); err == nil {
+			return i
+		}
+	}
+	return fallback
+}