improve class student dashboard

app/controllers/Clas.scala

@@ -60,11 +60,13 @@ final class Clas(
       case _ =>
         env.clas.api.clas.byId(lila.clas.Clas.Id(id)) flatMap {
           _ ?? { clas =>
-            env.clas.api.student.activeWithUsers(clas) flatMap { students =>
-              if (students.exists(_.student is me)) {
-                preloadStudentUsers(students)
-                Ok(views.html.clas.studentDashboard(clas, students)).fuccess
-              } else notFound
+            env.clas.api.teacher.of(clas) flatMap { teachers =>
+              env.clas.api.student.activeWithUsers(clas) flatMap { students =>
+                if (students.exists(_.student is me)) {
+                  preloadStudentUsers(students)
+                  Ok(views.html.clas.studentDashboard(clas, teachers, students)).fuccess
+                } else notFound
+              }
             }
           }
         }

app/views/clas/studentDashboard.scala

@@ -4,13 +4,14 @@ import controllers.routes
 import lila.api.Context
 import lila.app.templating.Environment._
 import lila.app.ui.ScalatagsTemplate._
-import lila.clas.{ Clas, Student }
+import lila.clas.{ Clas, Student, Teacher }
 import lila.common.String.html.richText
 
 object studentDashboard {
 
   def apply(
       c: Clas,
+      teachers: List[Teacher.WithUser],
       students: List[Student.WithUser]
   )(implicit ctx: Context) =
     bits.layout(c.name, Left(c withStudents Nil))(
@@ -18,12 +19,43 @@ object studentDashboard {
       div(cls := "box__top")(
         h1(dataIcon := "f", cls := "text")(c.name)
       ),
-      div(cls := "box__pad")(
-        c.desc.nonEmpty option div(cls := "clas-desc")(richText(c.desc)),
-        c.archived map { archived =>
+      c.archived map { archived =>
+        div(cls := "box__pad")(
           div(cls := "clas-show__archived archived")(bits.showArchived(archived))
-        },
-        clas.teachers(c)
+        )
+      },
+      c.desc.trim.nonEmpty option div(cls := "clas-show__overview")(richText(c.desc)),
+      table(cls := "slist slist-pad teachers")(
+        thead(
+          tr(
+            th("Teachers"),
+            th,
+            th
+          )
+        ),
+        tbody(
+          teachers.map {
+            case Teacher.WithUser(_, user) =>
+              tr(
+                td(
+                  userLink(
+                    user,
+                    name = span(
+                      strong(user.username),
+                      user.profile.flatMap(_.nonEmptyRealName) map { em(_) }
+                    ).some,
+                    withTitle = false
+                  )
+                ),
+                td(
+                  user.seenAt.map { seen =>
+                    trans.lastSeenActive(momentFromNow(seen))
+                  }
+                ),
+                challengeTd(user)
+              )
+          }
+        )
       ),
       div(cls := "students")(studentList(students))
     )
@@ -55,16 +87,19 @@ object studentDashboard {
               td(cls := "rating")(user.best3Perfs.map { showPerfRating(user, _) }),
               td(user.count.game.localize),
               td(user.perfs.puzzle.nb.localize),
-              td(
-                a(
-                  dataIcon := "U",
-                  cls := "button button-empty",
-                  title := trans.challengeToPlay.txt(),
-                  href := s"${routes.Lobby.home()}?user=${user.username}#friend"
-                )
-              )
+              challengeTd(user)
             )
         }
       )
     )
+
+  private def challengeTd(user: lila.user.User)(implicit ctx: Context) =
+    td(
+      a(
+        dataIcon := "U",
+        cls := "button button-empty",
+        title := trans.challengeToPlay.txt(),
+        href := s"${routes.Lobby.home()}?user=${user.username}#friend"
+      )
+    )
 }

modules/clas/src/main/ClasApi.scala

@@ -34,8 +34,18 @@ final class ClasApi(
           coll.insert.one(teacher) inject Teacher.WithUser(teacher, user)
       }
 
-    // def of(clas: Clas): Fu[List[Teacher]] =
-    //   coll.ext.byOrderedIds[Teacher, Teacher.Id](clas.teacherIds)(_.id)
+    def of(clas: Clas): Fu[List[Teacher.WithUser]] =
+      coll.ext.byOrderedIds[Teacher, Teacher.Id](clas.teachers.toList)(_.id) flatMap withUsers
+
+    def withUsers(teachers: List[Teacher]): Fu[List[Teacher.WithUser]] =
+      userRepo.coll.idsMap[User, User.ID](
+        teachers.map(_.userId),
+        ReadPreference.secondaryPreferred
+      )(_.id) map { users =>
+        teachers.flatMap { s =>
+          users.get(s.userId) map { Teacher.WithUser(s, _) }
+        }
+      }
   }
 
   object clas {

ui/site/css/_clas.scss

@@ -91,9 +91,6 @@ $clas-color: rgb(127, 90, 240);
   &__overview {
     @extend %box-padding;
     background: $c-bg-zebra;
-    .clas-desc {
-      margin-bottom: 2em;
-    }
   }
 
   &__archived {
@@ -113,10 +110,13 @@ $clas-color: rgb(127, 90, 240);
     }
   }
 
-  .students {
+  .students, .teachers {
     th:first-child {
       font-weight: bold;
     }
+    .button {
+      font-size: 1.2em;
+    }
     .user-link {
       @extend %flex-center;
       span {
@@ -130,6 +130,8 @@ $clas-color: rgb(127, 90, 240);
         display: block;
       }
     }
+  }
+  .students {
     .rating {
       font-weight: bold;
         span {
@@ -142,15 +144,17 @@ $clas-color: rgb(127, 90, 240);
   }
 
   &-student {
-    .students {
-      .button {
-        font-size: 1.2em;
-      }
+    .teachers {
+      margin-bottom: 2em;
     }
   }
 
   &-teacher {
 
+    .clas-desc {
+      margin-bottom: 2em;
+    }
+
     .progress {
       @extend %box-padding;
       background: $c-bg-zebra;