From c3263c03776401ad1263a9fb8f5a44a8ed44d61b Mon Sep 17 00:00:00 2001
From: Julien Dessaux
Date: Wed, 17 Nov 2021 10:13:06 +0100
Subject: Refactored package structure

---
 pkg/config/game.go | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 pkg/config/game.go

(limited to 'pkg/config/game.go')

diff --git a/pkg/config/game.go b/pkg/config/game.go
new file mode 100644
index 0000000..b5f4d39
--- /dev/null
+++ b/pkg/config/game.go
@@ -0,0 +1,63 @@
+package config
+
+import (
+	"regexp"
+
+	"github.com/pkg/errors"
+	"golang.org/x/sys/unix"
+)
+
+var reValidGameName = regexp.MustCompile(`^[\w\._]+$`)
+var reValidFileMode = regexp.MustCompile(`^0[\d]{3}$`)
+var reSpace = regexp.MustCompile(`^\s$`)
+
+// Game struct containers the configuration for a game
+type Game struct {
+	// ChrootPath is the chroot path for the game
+	ChrootPath string `yaml:"ChrootPath"`
+	// FileMode is the file mode to use when copying files
+	FileMode string `yaml:"FileMode"`
+	// Commands is the command list
+	Commands []string `yaml:"Commands"`
+	// Env is the environment in which to exec the commands
+	Env map[string]string `yaml:"Env"`
+}
+
+func (g *Game) validate(name string) error {
+	// Game name
+	if ok := reValidGameName.MatchString(name); !ok {
+		return errors.New("Invalid Game name, must match regex `^[\\w\\._]+$` : " + name)
+	}
+	// ChrootPath  TODO
+	if err := unix.Access(g.ChrootPath, unix.R_OK|unix.X_OK); err != nil {
+		return errors.Wrapf(err, "Invalid ChrootPath : %s", g.ChrootPath)
+	}
+	// FileMode
+	if ok := reValidFileMode.MatchString(g.FileMode); !ok {
+		return errors.New("Invalid File Mode, must match regex `^0[\\d]{3}$` : " + name)
+	}
+	// Commands
+	if len(g.Commands) == 0 {
+		return errors.New("Invalid game " + name + " has no commands")
+	}
+	for i := 0; i < len(g.Commands); i++ {
+		if err := validateCommand(g.Commands[i]); err != nil {
+			return errors.Wrapf(err, "Failed to validate Commands for game %s", name)
+		}
+	}
+	// Env
+	for k, _ := range g.Env {
+		for _, c := range k {
+			switch c {
+			case '=':
+				return errors.New("Environment variable key must not contain equal sign")
+			case '\000':
+				return errors.New("Environment variable key must not contain null character")
+			}
+			if reSpace.MatchString(string(c)) {
+				return errors.New("Environment variable key must not contain spaces")
+			}
+		}
+	}
+	return nil
+}
-- 
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