Change things

src/jsMain/kotlin/de/kif/frontend/PushServiceClient.kt

@@ -34,6 +34,7 @@ class PushServiceClient {
         clearInterval(id)
         intervalId = null
 
+        println("reload")
         window.location.reload()
     }
 

src/jsMain/kotlin/de/kif/frontend/views/calendar/Calendar.kt

@@ -120,6 +120,16 @@ class Calendar(calendar: HTMLElement) : View(calendar) {
         event?.stopPropagation()
     }
 
+    private var visibleRooms: Set<Long> = emptySet()
+
+    fun isRoomHidden(roomId: Long): Boolean {
+        return hideEmpty && roomId !in visibleRooms
+    }
+
+    fun updateVisibility() {
+        visibleRooms = body.calendarCells.asSequence().filter { it.isNotEmpty() }.map { it.roomId }.toSet()
+    }
+
     init {
         scroll += calendarTable
 

src/jsMain/kotlin/de/kif/frontend/views/calendar/CalendarBody.kt

@@ -36,6 +36,12 @@ class CalendarBody(val calendar: Calendar, view: HTMLElement) : ViewCollection<C
     var maxTime = 0
     var minTime = 0
 
+    fun updateVisibility() {
+        for (c in children) {
+            c.updateVisibility()
+        }
+    }
+
     private suspend fun updateRows(startTime: Int? = null, length: Int = 0) {
         if (calendarEntries.isEmpty() && startTime == null && !editable) {
             for (row in iterator().asSequence().toList()) {
@@ -99,6 +105,8 @@ class CalendarBody(val calendar: Calendar, view: HTMLElement) : ViewCollection<C
         while (max > last().time + 15) {
             append(CalendarRow.create(this, last().time + 15))
         }
+
+        calendar.updateVisibility()
     }
 
     fun update(scroll: ScrollBehavior) {
@@ -173,8 +181,11 @@ class CalendarBody(val calendar: Calendar, view: HTMLElement) : ViewCollection<C
                 updateRows(schedule.time, schedule.workGroup.length)
 
                 calendarEntries += CalendarEntry.create(this, schedule)
+
+                calendar.updateVisibility()
             }
         }
+
         ScheduleRepository.onUpdate {
             launch {
                 val schedule = ScheduleRepository.get(it) ?: throw  NoSuchElementException()

src/jsMain/kotlin/de/kif/frontend/views/calendar/CalendarCell.kt

@@ -8,11 +8,17 @@ import org.w3c.dom.HTMLDivElement
 import org.w3c.dom.HTMLElement
 import org.w3c.dom.set
 
-class CalendarCell(row: CalendarRow, view: HTMLElement) : ViewCollection<CalendarEntry>(view) {
+class CalendarCell(val row: CalendarRow, view: HTMLElement) : ViewCollection<CalendarEntry>(view) {
     val day = row.day
     val time = row.time
 
     val roomId = dataset["room"]?.toLongOrNull() ?: 0
+    var hiddenString by dataset.property("hidden")
+    var hidden: Boolean
+        get() = hiddenString?.toBoolean() ?: false
+        set(value) {
+            hiddenString = value.toString()
+        }
 
     private lateinit var room: Room
 
@@ -25,6 +31,10 @@ class CalendarCell(row: CalendarRow, view: HTMLElement) : ViewCollection<Calenda
         return room
     }
 
+    fun updateVisibility() {
+        hidden = row.calendar.calendar.isRoomHidden(roomId)
+    }
+
     companion object {
         fun create(row: CalendarRow, roomId: Long): CalendarCell {
             val view = createHtmlView<HTMLDivElement>()

src/jsMain/kotlin/de/kif/frontend/views/calendar/CalendarRow.kt

@@ -13,6 +13,12 @@ class CalendarRow(val calendar: CalendarBody, view: HTMLElement) : ViewCollectio
 
     val time = dataset["time"]?.toIntOrNull() ?: 0
 
+    fun updateVisibility() {
+        for (c in children) {
+            c.updateVisibility()
+        }
+    }
+
     init {
         wrapContent {
             CalendarCell(this, it)
@@ -20,6 +26,7 @@ class CalendarRow(val calendar: CalendarBody, view: HTMLElement) : ViewCollectio
 
         RoomRepository.onCreate {
             +CalendarCell.create(this, it)
+            calendar.calendar.updateVisibility()
         }
         RoomRepository.onDelete { id ->
             find { it.roomId == id }?.let(this@CalendarRow::remove)

src/jsMain/resources/style/components/_calendar.scss

@@ -169,7 +169,7 @@
   background-color: var(--table-header-color) !important;
 }
 
-.calendar-cell[data-empty = "true"] {
+.calendar-cell[data-hidden = "true"] {
   display: none;
 }
 

src/jvmMain/kotlin/de/kif/backend/route/Calendar.kt

@@ -152,7 +152,7 @@ fun DIV.renderCalendar(
                             div("calendar-cell") {
                                 attributes["data-room"] = room.id.toString()
                                 attributes["data-blocked"] = blocked.toString()
-                                attributes["data-empty"] = (hideEmptyRooms && room !in schedules).toString()
+                                attributes["data-hidden"] = (hideEmptyRooms && room !in schedules).toString()
 
                                 title = room.name + " - " + timeString