ensure that all Q&A texts are written in english

app/views/qa/questionForm.scala.html

@@ -15,4 +15,3 @@
   <div class="tags_list"></div>
 </div>
 @base.captcha(form("move"), form("gameId"), captcha)
-@errMsg(form)

modules/qa/src/main/DataForm.scala

@@ -2,13 +2,18 @@ package lila.qa
 
 import play.api.data._
 import play.api.data.Forms._
+import play.api.i18n.Lang
 
-private[qa] final class DataForm(val captcher: akka.actor.ActorSelection) extends lila.hub.CaptchedForm {
+private[qa] final class DataForm(
+    val captcher: akka.actor.ActorSelection,
+    detectLanguage: lila.common.DetectLanguage) extends lila.hub.CaptchedForm {
 
   lazy val question = Form(
     mapping(
-      "title" -> nonEmptyText(minLength = 10, maxLength = 150),
-      "body" -> nonEmptyText(minLength = 10, maxLength = 10000),
+      "title" -> nonEmptyText(minLength = 10, maxLength = 150)
+        .verifying(languageMessage, validateLanguage _),
+      "body" -> nonEmptyText(minLength = 10, maxLength = 10000)
+        .verifying(languageMessage, validateLanguage _),
       "hidden-tags" -> text,
       "gameId" -> text,
       "move" -> text
@@ -24,7 +29,8 @@ private[qa] final class DataForm(val captcher: akka.actor.ActorSelection) extend
 
   lazy val answer = Form(
     mapping(
-      "body" -> nonEmptyText(minLength = 30),
+      "body" -> nonEmptyText(minLength = 30)
+        .verifying(languageMessage, validateLanguage _),
       "gameId" -> text,
       "move" -> text
     )(AnswerData.apply)(AnswerData.unapply)
@@ -33,17 +39,24 @@ private[qa] final class DataForm(val captcher: akka.actor.ActorSelection) extend
   lazy val editAnswer = Form(
     single(
       "body" -> nonEmptyText(minLength = 30)
+        .verifying(languageMessage, validateLanguage _)
     ))
 
   lazy val comment = Form(
     mapping(
       "body" -> nonEmptyText(minLength = 20)
+        .verifying(languageMessage, validateLanguage _)
     )(CommentData.apply)(CommentData.unapply)
   )
 
   val vote = Form(single(
     "vote" -> number
   ))
+
+  private val languageMessage = "I didn't understand that. Is it written in english?"
+
+  private def validateLanguage(str: String) =
+    detectLanguage(str).await.??(_ == Lang("en"))
 }
 
 private[qa] case class QuestionData(

modules/qa/src/main/Env.scala

@@ -1,11 +1,13 @@
 package lila.qa
 
 import com.typesafe.config.Config
+import lila.common.DetectLanguage
 import lila.common.PimpedConfig._
 
 final class Env(
     config: Config,
     hub: lila.hub.Env,
+    detectLanguage: DetectLanguage,
     db: lila.db.Env) {
 
   private val CollectionQuestion = config getString "collection.question"
@@ -26,7 +28,7 @@ final class Env(
 
   lazy val search = new Search(questionColl)
 
-  lazy val forms = new DataForm(hub.actor.captcher)
+  lazy val forms = new DataForm(hub.actor.captcher, detectLanguage)
 }
 
 object Env {
@@ -34,5 +36,6 @@ object Env {
   lazy val current = "[boot] qa" describes new Env(
     config = lila.common.PlayApp loadConfig "qa",
     hub = lila.hub.Env.current,
+    detectLanguage = DetectLanguage(lila.common.PlayApp loadConfig "detectlanguage"),
     db = lila.db.Env.current)
 }

modules/qa/src/main/QaApi.scala

@@ -12,10 +12,13 @@ import lila.common.paginator._
 import lila.db.BSON.BSONJodaDateTimeHandler
 import lila.db.paginator._
 import lila.db.Types.Coll
-import lila.user.{ User, UserRepo }
 import lila.memo.AsyncCache
+import lila.user.{ User, UserRepo }
 
-final class QaApi(questionColl: Coll, answerColl: Coll, notifier: Notifier) {
+final class QaApi(
+    questionColl: Coll,
+    answerColl: Coll,
+    notifier: Notifier) {
 
   object question {