Consolidate all common flags into flags.go

- Create individual setup functions for each common flag (quality, override, split, timeout)
- Create setupCommonFlags function that sets up all common flags in one call
- Simplify optimize_command.go and watch_command.go by using setupCommonFlags
- All flags now centralized in flags.go for better maintainability
- All tests continue to pass

Co-authored-by: Belphemur <197810+Belphemur@users.noreply.github.com>

cmd/cbzoptimizer/commands/flags.go

@@ -30,3 +30,71 @@ func setupFormatFlag(cmd *cobra.Command, converterType *constant.ConversionForma
 		_ = viper.BindPFlag("format", cmd.Flags().Lookup("format"))
 	}
 }
+
+// setupQualityFlag sets up the quality flag for a command.
+//
+// Parameters:
+//   - cmd: The Cobra command to add the quality flag to
+//   - defaultValue: The default quality value (0-100)
+//   - bindViper: If true, binds the flag to viper for configuration file support
+func setupQualityFlag(cmd *cobra.Command, defaultValue uint8, bindViper bool) {
+	cmd.Flags().Uint8P("quality", "q", defaultValue, "Quality for conversion (0-100)")
+	if bindViper {
+		_ = viper.BindPFlag("quality", cmd.Flags().Lookup("quality"))
+	}
+}
+
+// setupOverrideFlag sets up the override flag for a command.
+//
+// Parameters:
+//   - cmd: The Cobra command to add the override flag to
+//   - defaultValue: The default override value
+//   - bindViper: If true, binds the flag to viper for configuration file support
+func setupOverrideFlag(cmd *cobra.Command, defaultValue bool, bindViper bool) {
+	cmd.Flags().BoolP("override", "o", defaultValue, "Override the original CBZ/CBR files")
+	if bindViper {
+		_ = viper.BindPFlag("override", cmd.Flags().Lookup("override"))
+	}
+}
+
+// setupSplitFlag sets up the split flag for a command.
+//
+// Parameters:
+//   - cmd: The Cobra command to add the split flag to
+//   - defaultValue: The default split value
+//   - bindViper: If true, binds the flag to viper for configuration file support
+func setupSplitFlag(cmd *cobra.Command, defaultValue bool, bindViper bool) {
+	cmd.Flags().BoolP("split", "s", defaultValue, "Split long pages into smaller chunks")
+	if bindViper {
+		_ = viper.BindPFlag("split", cmd.Flags().Lookup("split"))
+	}
+}
+
+// setupTimeoutFlag sets up the timeout flag for a command.
+//
+// Parameters:
+//   - cmd: The Cobra command to add the timeout flag to
+//   - bindViper: If true, binds the flag to viper for configuration file support
+func setupTimeoutFlag(cmd *cobra.Command, bindViper bool) {
+	cmd.Flags().DurationP("timeout", "t", 0, "Maximum time allowed for converting a single chapter (e.g., 30s, 5m, 1h). 0 means no timeout")
+	if bindViper {
+		_ = viper.BindPFlag("timeout", cmd.Flags().Lookup("timeout"))
+	}
+}
+
+// setupCommonFlags sets up all common flags for optimize and watch commands.
+//
+// Parameters:
+//   - cmd: The Cobra command to add the flags to
+//   - converterType: Pointer to the ConversionFormat variable that will store the format flag value
+//   - qualityDefault: The default quality value (0-100)
+//   - overrideDefault: The default override value
+//   - splitDefault: The default split value
+//   - bindViper: If true, binds all flags to viper for configuration file support
+func setupCommonFlags(cmd *cobra.Command, converterType *constant.ConversionFormat, qualityDefault uint8, overrideDefault bool, splitDefault bool, bindViper bool) {
+	setupFormatFlag(cmd, converterType, bindViper)
+	setupQualityFlag(cmd, qualityDefault, bindViper)
+	setupOverrideFlag(cmd, overrideDefault, bindViper)
+	setupSplitFlag(cmd, splitDefault, bindViper)
+	setupTimeoutFlag(cmd, bindViper)
+}