feat(tournament): auto-join external tournaments and publish created ones (#77)

Official bots now poll the external tournament server and auto-join every
created tournament with the hardest bot (expert). Tournaments created in
NowChessSystems are forwarded to the native tournament server so the bots
can see and join them.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Reviewed-on: #77

modules/tournament/src/main/resources/application.yml

@@ -30,6 +30,8 @@ nowchess:
   tournament:
     self-url: ""
     external-servers: ""
+    native-server-url: ${TOURNAMENT_NATIVE_SERVER_URL:http://141.37.123.132:8086}
+    director-name: ${TOURNAMENT_DIRECTOR_NAME:NowChess System}
 
 mp:
   jwt:
@@ -53,6 +55,8 @@ mp:
     tournament:
       self-url: ${TOURNAMENT_SELF_URL:}
       external-servers: ${TOURNAMENT_EXTERNAL_SERVERS:}
+      native-server-url: ${TOURNAMENT_NATIVE_SERVER_URL:http://141.37.123.132:8086}
+      director-name: ${TOURNAMENT_DIRECTOR_NAME:NowChess System}
 
 "%test":
   quarkus:

modules/tournament/src/main/scala/de/nowchess/tournament/resource/TournamentResource.scala

@@ -40,6 +40,12 @@ class TournamentResource:
 
   @ConfigProperty(name = "nowchess.tournament.self-url")
   var selfUrl: Optional[String] = uninitialized
+
+  @ConfigProperty(name = "nowchess.tournament.native-server-url", defaultValue = "http://141.37.123.132:8086")
+  var nativeServerUrl: String = uninitialized
+
+  @ConfigProperty(name = "nowchess.tournament.director-name", defaultValue = "NowChess System")
+  var directorName: String = uninitialized
   // scalafix:on
 
   @GET
@@ -95,8 +101,31 @@ class TournamentResource:
           log.warnf("Failed to replicate tournament %s to %s", t.id, remoteUrl)
       }
     }
+    publishToNativeServer(t)
     Response.status(Response.Status.CREATED).entity(tournamentService.toDto(t)).build()
 
+  private def publishToNativeServer(t: de.nowchess.tournament.domain.Tournament): Unit =
+    if nativeServerUrl.nonEmpty then
+      val form = encodeForm(
+        Map(
+          "name"           -> t.fullName,
+          "nbRounds"       -> t.nbRounds.toString,
+          "clockLimit"     -> t.clockLimit.toString,
+          "clockIncrement" -> t.clockIncrement.toString,
+          "rated"          -> t.rated.toString,
+        ),
+      )
+      if !externalClient.publishNative(nativeServerUrl, directorName, form) then
+        log.warnf("Failed to publish tournament %s to native server %s", t.id, nativeServerUrl)
+
+  private def encodeForm(params: Map[String, String]): String =
+    params
+      .map((k, v) => s"${enc(k)}=${enc(v)}")
+      .mkString("&")
+
+  private def enc(s: String): String =
+    java.net.URLEncoder.encode(s, "UTF-8")
+
   @GET
   @Path("/{id}")
   @PermitAll

modules/tournament/src/main/scala/de/nowchess/tournament/service/ExternalTournamentClient.scala

@@ -14,10 +14,56 @@ class ExternalTournamentClient:
 
   // scalafix:off DisableSyntax.var
   @Inject var objectMapper: ObjectMapper = uninitialized
+  @volatile private var directorToken: Option[String] = None
   // scalafix:on
 
   private def buildClient(): Client = ClientBuilder.newClient()
 
+  def publishNative(serverUrl: String, directorName: String, form: String): Boolean =
+    val token = directorToken.orElse {
+      val fresh = registerDirector(serverUrl, directorName)
+      directorToken = fresh
+      fresh
+    }
+    token.exists { tok =>
+      if createNative(serverUrl, tok, form) then true
+      else
+        val refreshed = registerDirector(serverUrl, directorName)
+        directorToken = refreshed
+        refreshed.exists(createNative(serverUrl, _, form))
+    }
+
+  private def registerDirector(serverUrl: String, name: String): Option[String] =
+    Try {
+      val client = buildClient()
+      val body   = s"""{"name":"${name.replace("\"", "\\\"")}","isBot":false}"""
+      val response = client
+        .target(s"$serverUrl/api/auth/register")
+        .request(MediaType.APPLICATION_JSON)
+        .post(Entity.entity(body, MediaType.APPLICATION_JSON))
+      try
+        if response.getStatus / 100 == 2 then
+          Option(objectMapper.readTree(response.readEntity(classOf[String])).path("token").asText()).filter(_.nonEmpty)
+        else None
+      finally
+        response.close()
+        client.close()
+    }.getOrElse(None)
+
+  private def createNative(serverUrl: String, token: String, form: String): Boolean =
+    Try {
+      val client = buildClient()
+      val response = client
+        .target(s"$serverUrl/api/tournament")
+        .request(MediaType.APPLICATION_JSON)
+        .header("Authorization", s"Bearer $token")
+        .post(Entity.entity(form, MediaType.APPLICATION_FORM_URLENCODED))
+      try response.getStatus / 100 == 2
+      finally
+        response.close()
+        client.close()
+    }.getOrElse(false)
+
   def fetchList(serverUrl: String): Option[JsonNode] =
     Try {
       val client   = buildClient()