lameNameCheck config

conf/base.conf

@@ -217,6 +217,7 @@ security {
   recaptcha = ${recaptcha}
   mailgun = ${mailgun}
   ipintel.email = "-"
+  lame_name_check = true
 }
 oauth {
   mongodb {

modules/common/src/main/config.scala

@@ -58,5 +58,6 @@ object config {
 
   def strLoader[A](f: String => A): ConfigLoader[A] = ConfigLoader(_.getString) map f
   def intLoader[A](f: Int => A): ConfigLoader[A] = ConfigLoader(_.getInt) map f
+  def boolLoader[A](f: Boolean => A): ConfigLoader[A] = ConfigLoader(_.getBoolean) map f
   def durationLoader[A](f: FiniteDuration => A): ConfigLoader[A] = ConfigLoader(_.duration) map f
 }

modules/security/src/main/DataForm.scala

@@ -12,7 +12,8 @@ final class DataForm(
     userRepo: UserRepo,
     val captcher: lila.hub.actors.Captcher,
     authenticator: lila.user.Authenticator,
-    emailValidator: EmailAddressValidator
+    emailValidator: EmailAddressValidator,
+    lameNameCheck: LameNameCheck
 ) extends lila.hub.CaptchedForm {
 
   import DataForm._
@@ -61,7 +62,7 @@ final class DataForm(
         regex = User.newUsernameChars,
         error = "usernameCharsInvalid"
       )
-    ).verifying("usernameUnacceptable", u => !LameName.username(u))
+    ).verifying("usernameUnacceptable", u => !lameNameCheck.value || !LameName.username(u))
       .verifying("usernameAlreadyUsed", u => !userRepo.nameExists(u).awaitSeconds(4))
 
     private val agreementBool = boolean.verifying(b => b)

modules/security/src/main/SecurityConfig.scala

@@ -24,7 +24,8 @@ private final class SecurityConfig(
     @ConfigName("check_mail_api") val checkMail: CheckMail,
     val recaptcha: Recaptcha.Config,
     val mailgun: Mailgun.Config,
-    @ConfigName("ipintel.email") val ipIntelEmail: EmailAddress
+    @ConfigName("ipintel.email") val ipIntelEmail: EmailAddress,
+    @ConfigName("lame_name_check") val lameNameCheck: LameNameCheck
 )
 
 private object SecurityConfig {
@@ -67,5 +68,7 @@ private object SecurityConfig {
   )
   implicit val checkMailLoader = AutoConfig.loader[CheckMail]
 
+  implicit val lameNameCheckLoader = boolLoader(LameNameCheck.apply)
+
   implicit val loader = AutoConfig.loader[SecurityConfig]
 }

modules/security/src/main/model.scala

@@ -29,6 +29,8 @@ case class IpAndFp(ip: IpAddress, fp: Option[String], user: User.ID)
 
 case class RecaptchaPublicConfig(key: String, enabled: Boolean)
 
+case class LameNameCheck(value: Boolean) extends AnyVal
+
 case class Signup(
     user: User,
     email: EmailAddress,