#2

internal/config/commands.go

@@ -0,0 +1,19 @@
+package config
+
+import "errors"
+
+type Commands struct {
+	Commands map[string]func(*State, Command) error
+}
+
+func (c *Commands) Register(name string, f func(*State, Command) error) {
+	c.Commands[name] = f
+}
+
+func (c *Commands) Run(s *State, cmd Command) error {
+	f, ok := c.Commands[cmd.Name]
+	if !ok {
+		return errors.New("unknown command: " + cmd.Name)
+	}
+	return f(s, cmd)
+}