Began implementing config validation

1 files changed, 37 insertions, 0 deletions

diff --git a/config/app.go b/config/app.go
index 541699c..d7d1051 100644
--- a/config/app.go
+++ b/config/app.go
@@ -1,5 +1,12 @@
 package config
 
+import (
+	"os"
+
+	"github.com/pkg/errors"
+	"golang.org/x/sys/unix"
+)
+
 // App struct contains the configuration for this application
 type App struct {
 	// WorkingDirectory is the program working directory where the user data, save files and scores are stored
@@ -15,3 +22,33 @@ type App struct {
 	// PostLoginCommands is the list of commands to execute upon login, like creating save directories for games
 	PostLoginCommands []string `yaml:"PostLoginCommands"`
 }
+
+func (a *App) validate() error {
+	// WorkingDirectory
+	if err := os.MkdirAll(a.WorkingDirectory, 0700); err != nil {
+		return errors.Wrapf(err, "Invalid WorkingDirectory : %s", a.WorkingDirectory)
+	}
+	if err := unix.Access(a.WorkingDirectory, unix.W_OK); err != nil {
+		return errors.Wrapf(err, "Invalid WorkingDirectory : %s", a.WorkingDirectory)
+	}
+	// MaxUsers
+	if a.MaxUsers <= 0 {
+		return errors.New("MaxUsers must be a positive integer")
+	}
+	// AllowRegistration is just a bool, nothing to validate
+	// MaxNickLen
+	if a.MaxNickLen <= 0 {
+		return errors.New("MaxNickLen must be a positive integer")
+	}
+	// MenuMaxIdleTime
+	if a.MenuMaxIdleTime <= 0 {
+		return errors.New("MenuMaxIdleTime must be a positive integer")
+	}
+	// PostLoginCommands
+	for i := 0; i < len(a.PostLoginCommands); i++ {
+		if err := validateCommand(a.PostLoginCommands[i]); err != nil {
+			return errors.Wrap(err, "Failed to validate PostLoginCommands")
+		}
+	}
+	return nil
+}