Refactoring

- logging interface
- log levels
- application interface

Signed-off-by: Jan Tytgat <jan.tytgat@corelayer.eu>

application/logging.go

@@ -1,6 +1,9 @@
 package application
 
 import (
+	"log/slog"
+
+	"git.flexabyte.io/flexabyte/go-slogd/slogd"
 	"github.com/spf13/cobra"
 )
 
@@ -10,20 +13,25 @@ const (
 	LogOutputFile   = "file"
 )
 
-var logLevelFlag string
-var logOutputFlag string
-var logTypeFlag string
+var (
+	logLevelFlagName  string = "log-level"
+	logLevelFlag      string
+	logOutputFlagName string = "log-output"
+	logOutputFlag     string
+	logTypeFlagName   = "log-type"
+	logTypeFlag       string
+)
 
 func addLogLevelFlag(cmd *cobra.Command) {
-	cmd.PersistentFlags().StringVarP(&logLevelFlag, "log-level", "", "info", "Set log level (trace, debug, info, warn, error, fatal)")
+	cmd.PersistentFlags().StringVarP(&logLevelFlag, logLevelFlagName, "", "info", "Set log level (trace, debug, info, warn, error, fatal)")
 }
 
 func addLogOutputFlag(cmd *cobra.Command) {
-	cmd.PersistentFlags().StringVarP(&logOutputFlag, "log-outWriter", "", "stderr", "Set log outWriter (stdout, stderr, file)")
+	cmd.PersistentFlags().StringVarP(&logOutputFlag, logOutputFlagName, "", "stderr", "Set log output (stdout, stderr, file)")
 }
 
 func addLogTypeFlag(cmd *cobra.Command) {
-	cmd.PersistentFlags().StringVarP(&logTypeFlag, "log-type", "", "text", "Set log type (text, json, color)")
+	cmd.PersistentFlags().StringVarP(&logTypeFlag, logTypeFlagName, "", "text", "Set log type (text, json, color)")
 }
 
 func configureLoggingFlags(cmd *cobra.Command) {
@@ -33,3 +41,12 @@ func configureLoggingFlags(cmd *cobra.Command) {
 
 	cmd.MarkFlagsMutuallyExclusive("no-color", "log-type")
 }
+
+func GetLogLevelFromArgs(args []string) slog.Level {
+	for i, arg := range args {
+		if arg == "--log-level" && i+1 < len(args) {
+			return slogd.Level(args[i+1])
+		}
+	}
+	return slogd.LevelDefault
+}