broadcast reset button - closes #5641

app/controllers/Relay.scala

@@ -55,6 +55,12 @@ object Relay extends LilaController {
     }
   }
 
+  def reset(slug: String, id: String) = Auth { implicit ctx => me =>
+    OptionFuResult(env.api.byIdAndContributor(id, me)) { relay =>
+      env.api.reset(relay, me) inject Redirect(showRoute(relay))
+    }
+  }
+
   def show(slug: String, id: String) = Open { implicit ctx =>
     pageHit
     WithRelay(slug, id) { relay =>

app/views/relay/form.scala

@@ -21,7 +21,14 @@ object form {
   def edit(r: lila.relay.Relay, form: Form[Data])(implicit ctx: Context) =
     layout(r.name)(
       h1("Edit ", r.name),
-      inner(form, routes.Relay.update(r.slug, r.id.value))
+      inner(form, routes.Relay.update(r.slug, r.id.value)),
+      hr,
+      postForm(action := routes.Relay.reset(r.slug, r.id.value))(
+        submitButton(
+          cls := "button button-red confirm",
+          title := "The source will need to be active in order to re-create the chapters!"
+        )("Reset the broadcast")
+      )
     )
 
   private def layout(title: String)(body: Modifier*)(implicit ctx: Context) =

conf/routes

@@ -136,6 +136,7 @@ GET   /broadcast/:slug/$id<\w{8}>          controllers.Relay.show(slug: String,
 GET   /broadcast/:slug/$id<\w{8}>/$chapterId<\w{8}> controllers.Relay.chapter(slug: String, id: String, chapterId: String)
 GET   /broadcast/:slug/$id<\w{8}>/edit     controllers.Relay.edit(slug: String, id: String)
 POST  /broadcast/:slug/$id<\w{8}>/edit     controllers.Relay.update(slug: String, id: String)
+POST  /broadcast/:slug/$id<\w{8}>/reset    controllers.Relay.reset(slug: String, id: String)
 
 # Learn
 GET   /learn                           controllers.Learn.index

modules/relay/src/main/RelayApi.scala

@@ -87,6 +87,10 @@ final class RelayApi(
     } inject relay
   }
 
+  def reset(relay: Relay, by: User): Funit =
+    studyApi.deleteAllChapters(relay.studyId, by) >>
+      requestPlay(relay.id, true)
+
   def getOngoing(id: Relay.Id): Fu[Option[Relay]] =
     repo.coll.find($doc("_id" -> id, "finished" -> false)).uno[Relay]
 

modules/study/src/main/StudyApi.scala

@@ -700,6 +700,12 @@ final class StudyApi(
       }
     }
 
+  def deleteAllChapters(studyId: Study.Id, by: User) = sequenceStudy(studyId) { study =>
+    Contribute(by.id, study) {
+      chapterRepo deleteByStudy study
+    }
+  }
+
   def erase(user: User) = studyRepo.allIdsByOwner(user.id) flatMap { ids =>
     chat ! lila.chat.actorApi.RemoveAll(ids.map(id => Chat.Id(id.value)))
     studyRepo.deleteByIds(ids) >>
@@ -725,7 +731,7 @@ final class StudyApi(
 
   private def reloadChapters(study: Study) =
     chapterRepo.orderedMetadataByStudy(study.id).foreach { chapters =>
-      sendTo(study.id)(_.reloadChapters(chapters))
+      sendTo(study.id)(_ reloadChapters chapters)
     }
 
   import ornicar.scalalib.Zero