Reload page on server restart

src/commonMain/kotlin/de/kif/common/Message.kt

@@ -9,6 +9,7 @@ import kotlinx.serialization.modules.SerializersModule
 @Serializable
 data class MessageBox(
     val timestamp: Long,
+    val signature: String,
     val valid: Boolean,
     val messages: List<Message>
 )

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

@@ -20,6 +20,7 @@ class PushServiceClient {
     private val parser = DynamicObjectParser()
 
     private var timestamp = body.dataset["timestamp"]?.toLongOrNull() ?: 0L
+    private val signature = body.dataset["signature"] ?: ""
     private var intervalId: Int? = null
 
     private fun reload() {
@@ -33,7 +34,7 @@ class PushServiceClient {
     private fun onMessage(messageBox: MessageBox) {
         body.classList.remove("offline")
 
-        if (messageBox.valid) {
+        if (messageBox.valid && signature == messageBox.signature) {
             timestamp = messageBox.timestamp
 
             for (message in messageBox.messages) {

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

@@ -85,6 +85,22 @@
 .board-running {
   display: flex;
   flex-wrap: wrap;
+
+  &:empty + .board-running-empty {
+    display: block;
+  }
+}
+
+.board-running-empty {
+  position: absolute !important;
+  top: 0;
+  left: 0;
+  height: 8rem;
+  line-height: 8rem;
+  width: 70%;
+  text-align: center;
+  font-size: 1.7rem;
+  font-family: $headFont;
 }
 
 .board-schedule {

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

@@ -89,13 +89,12 @@ fun Route.board() {
         val nowLocale = now.time + timeOffset
         respondMain(true, true) { theme ->
             content {
-
                 val announcement = AnnouncementRepository.getAnnouncement()
-                var classes = "board-announcement announcement"
+                var announcementClasses = "board-announcement announcement"
                 if (announcement.isBlank()) {
-                    classes += " announcement-blank"
+                    announcementClasses += " announcement-blank"
                 }
-                div(classes) {
+                div(announcementClasses) {
                     span {
                         +announcement
                     }
@@ -155,6 +154,11 @@ fun Route.board() {
                                 }
                             }
                         }
+                        div("board-running-empty") {
+                            span {
+                                +"Es sind keine weiteren AKs geplant"
+                            }
+                        }
                         div("board-logo") {
                             img("KIF 47.0", "$prefix/static/images/logo.svg")
                             div("board-header-date") {

src/jvmMain/kotlin/de/kif/backend/util/PushService.kt

@@ -7,6 +7,7 @@ import de.kif.common.Message
 import de.kif.common.MessageBox
 import de.kif.common.MessageType
 import de.kif.common.RepositoryType
+import de.kif.common.model.Post
 import io.ktor.application.call
 import io.ktor.http.HttpStatusCode
 import io.ktor.routing.Route
@@ -16,7 +17,8 @@ import kotlin.concurrent.thread
 
 object PushService {
 
-    private var leastValidTimestamp = System.currentTimeMillis()
+    internal var leastValidTimestamp = System.currentTimeMillis()
+    val signature = Post.generateUrl()
 
     private val messages: MutableList<Pair<Long, Message>> = mutableListOf()
 
@@ -52,6 +54,7 @@ object PushService {
         return if (timestamp < leastValidTimestamp) {
             MessageBox(
                 System.currentTimeMillis(),
+                signature,
                 false,
                 emptyList()
             )
@@ -63,6 +66,7 @@ object PushService {
 
             MessageBox(
                 System.currentTimeMillis(),
+                signature,
                 true,
                 m.map { it.second }
             )
@@ -84,6 +88,8 @@ object PushService {
 }
 
 fun Route.pushService() {
+    PushService.leastValidTimestamp = System.currentTimeMillis()
+
     get("/api/updates") {
         try {
             val timestamp = call.request.queryParameters["timestamp"]?.toLongOrNull() ?: 0

src/jvmMain/kotlin/de/kif/backend/view/MainTemplate.kt

@@ -4,6 +4,7 @@ import de.kif.backend.PortalSession
 import de.kif.backend.Resources
 import de.kif.backend.prefix
 import de.kif.backend.repository.AnnouncementRepository
+import de.kif.backend.util.PushService
 import de.kif.common.model.User
 import io.ktor.application.ApplicationCall
 import io.ktor.application.call
@@ -75,6 +76,7 @@ class MainTemplate(
         }
         body {
             attributes["data-timestamp"] = currentTimeMillis().toString()
+            attributes["data-signature"] = PushService.signature
 
             if (!noMenu) {
                 insert(MenuTemplate(url, user)) {}