Add status endpoint

projector-common/src/commonMain/kotlin/org/jetbrains/projector/common/protocol/handshake/Constant.kt

@@ -61,4 +61,5 @@ val commonVersionList = listOf(
   1980644253,
   1328208692,
   -1867356666,
+  -1218764012,
 )

projector-common/src/commonMain/kotlin/org/jetbrains/projector/common/protocol/toClient/StatusEndpoint.kt

@@ -0,0 +1,41 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2019-2022 JetBrains s.r.o.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package org.jetbrains.projector.common.protocol.toClient
+
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.Json
+
+@Serializable
+data class Status(
+  val mainWindowsCount: Int,
+  val lastUserActionTimeStampMs: Long,
+)
+
+private val json = Json.Default
+private val serializer = Status.serializer()
+
+fun Status.toJson(): String = json.encodeToString(serializer, this)
+
+fun String.toStatus(): Status = json.decodeFromString(serializer, this)

projector-common/src/commonMain/kotlin/org/jetbrains/projector/common/protocol/toServer/ClientEvent.kt

@@ -56,6 +56,12 @@ enum class KeyModifier {
 @Serializable
 sealed class ClientEvent
 
+@Serializable
+sealed class ClientUserEvent : ClientEvent()
+
+@Serializable
+sealed class ClientNonUserEvent : ClientEvent()
+
 @Serializable
 data class ClientMouseEvent(
   /** From connection opening. */
@@ -67,7 +73,7 @@ data class ClientMouseEvent(
   val clickCount: Int,
   val modifiers: Set<MouseModifier>,
   val mouseEventType: MouseEventType,
-) : ClientEvent() {
+) : ClientUserEvent() {
 
   enum class MouseEventType {
     MOVE,
@@ -91,7 +97,7 @@ data class ClientWheelEvent(
   val y: Int,
   val deltaX: Double,
   val deltaY: Double,
-) : ClientEvent() {
+) : ClientUserEvent() {
 
   enum class ScrollingMode {
     PIXEL,
@@ -109,7 +115,7 @@ data class ClientKeyEvent(
   val location: KeyLocation,
   val modifiers: Set<KeyModifier>,
   val keyEventType: KeyEventType,
-) : ClientEvent() {
+) : ClientUserEvent() {
 
   enum class KeyEventType {
     DOWN,
@@ -130,7 +136,7 @@ data class ClientKeyPressEvent(
   val timeStamp: Int,
   val char: Char,
   val modifiers: Set<KeyModifier>,
-) : ClientEvent()
+) : ClientUserEvent()
 
 @Serializable
 data class ClientRawKeyEvent(
@@ -141,7 +147,7 @@ data class ClientRawKeyEvent(
   val modifiers: Int,
   val location: Int,
   val keyEventType: RawKeyEventType,
-) : ClientEvent() {
+) : ClientUserEvent() {
 
   enum class RawKeyEventType {
     DOWN,
@@ -151,38 +157,38 @@ data class ClientRawKeyEvent(
 }
 
 @Serializable
-data class ClientResizeEvent(val size: CommonIntSize) : ClientEvent()
+data class ClientResizeEvent(val size: CommonIntSize) : ClientUserEvent()
 
 @Serializable
-data class ClientRequestImageDataEvent(val imageId: ImageId) : ClientEvent()
+data class ClientRequestImageDataEvent(val imageId: ImageId) : ClientNonUserEvent()
 
 @Serializable
 data class ClientClipboardEvent(
   val stringContent: String,  // TODO: support more types
-) : ClientEvent()
+) : ClientNonUserEvent()
 
 @Serializable
 data class ClientRequestPingEvent(
   /** From connection opening. */
   val clientTimeStamp: Int,
-) : ClientEvent()
+) : ClientNonUserEvent()
 
 @Serializable
 data class ClientSetKeymapEvent(
   val keymap: UserKeymap,
-) : ClientEvent()
+) : ClientUserEvent()
 
 @Serializable
 data class ClientOpenLinkEvent(
   val link: String,
-) : ClientEvent()
+) : ClientUserEvent()
 
 @Serializable
 data class ClientWindowMoveEvent(
   val windowId: Int,
   val deltaX: Int,
   val deltaY: Int,
-) : ClientEvent()
+) : ClientUserEvent()
 
 // If delta is negative, we resizing to the left top
 @Serializable
@@ -191,38 +197,38 @@ data class ClientWindowResizeEvent(
   val deltaX: Int,
   val deltaY: Int,
   val direction: ResizeDirection,
-) : ClientEvent()
+) : ClientUserEvent()
 
 @Serializable
 data class ClientWindowSetBoundsEvent(
   val windowId: Int,
-  val bounds: CommonIntRectangle
-) : ClientEvent()
+  val bounds: CommonIntRectangle,
+) : ClientUserEvent()
 
 @Serializable
 data class ClientDisplaySetChangeEvent(
-  val newDisplays: List<DisplayDescription>
-) : ClientEvent()
+  val newDisplays: List<DisplayDescription>,
+) : ClientUserEvent()
 
 @Serializable
 data class ClientWindowCloseEvent(
   val windowId: Int,
-) : ClientEvent()
+) : ClientUserEvent()
 
 @Serializable
 data class ClientWindowInterestEvent(
   val windowId: Int,
-  val isInterested: Boolean
-): ClientEvent()
+  val isInterested: Boolean,
+) : ClientNonUserEvent()
 
 @Suppress("unused") //used in client-web/org.jetbrains.projector.client.web.window.WindowManager and at server side
 @Serializable
 data class ClientWindowsActivationEvent(
   val windowIds: List<Int>,
-) : ClientEvent()
+) : ClientUserEvent()
 
 @Suppress("unused") //used in client-web/org.jetbrains.projector.client.web.window.WindowManager and at server side
 @Serializable
 data class ClientWindowsDeactivationEvent(
   val windowIds: List<Int>,
-) : ClientEvent()
+) : ClientUserEvent()

projector-server-core/src/intTest/kotlin/org/jetbrains/projector/intTest/headless/ProjectorHttpWsServerTest.kt

@@ -37,6 +37,7 @@ import kotlinx.coroutines.runBlocking
 import org.java_websocket.WebSocket
 import org.jetbrains.projector.common.protocol.toClient.MainWindow
 import org.jetbrains.projector.common.protocol.toClient.toMainWindowList
+import org.jetbrains.projector.common.protocol.toClient.toStatus
 import org.jetbrains.projector.server.core.websocket.HttpWsServer
 import java.io.File
 import java.nio.ByteBuffer
@@ -75,6 +76,8 @@ class ProjectorHttpWsServerTest {
           pngBase64Icon = "png base 64",
         )
       )
+
+      override fun getLastUserActionTimeStampMs(): Long = 123
     }
   }
 
@@ -143,6 +146,20 @@ class ProjectorHttpWsServerTest {
     server.stop()
   }
 
+  @Test
+  fun testStatus() {
+    val server = createServer().also { it.start() }
+    val client = HttpClient()
+
+    val response = runBlocking { client.get<String>(prj("/status")) }.toStatus()
+
+    assertEquals(1, response.mainWindowsCount)
+    assertEquals(123, response.lastUserActionTimeStampMs)
+
+    client.close()
+    server.stop()
+  }
+
   @Test
   fun testFiles() {
     val server = createServer().also { it.start() }

projector-server-core/src/main/kotlin/org/jetbrains/projector/server/core/websocket/HttpWsServer.kt

@@ -35,6 +35,7 @@ import org.java_websocket.handshake.*
 import org.java_websocket.server.WebSocketServer
 import org.java_websocket.util.Charsetfunctions
 import org.jetbrains.projector.common.protocol.toClient.MainWindow
+import org.jetbrains.projector.common.protocol.toClient.Status
 import org.jetbrains.projector.common.protocol.toClient.toJson
 import org.jetbrains.projector.server.core.ClientWrapper
 import org.jetbrains.projector.server.core.util.getWildcardHostAddress
@@ -60,6 +61,7 @@ public abstract class HttpWsServer(host: InetAddress, port: Int) : HttpWsTranspo
   public constructor(port: Int) : this(getWildcardHostAddress(), port)
 
   public abstract fun getMainWindows(): List<MainWindow>
+  public abstract fun getLastUserActionTimeStampMs(): Long
 
   public fun onGetRequest(path: String): GetRequestResult {
     val pathWithoutParams = path.substringBefore('?').substringBefore('#')
@@ -75,6 +77,22 @@ public abstract class HttpWsServer(host: InetAddress, port: Int) : HttpWsTranspo
       )
     }
 
+    if (pathWithoutParams == "/status") {
+      val mainWindows = getMainWindows()
+      val lastUserActionTimeStampMs = getLastUserActionTimeStampMs()
+      val status = Status(
+        mainWindowsCount = mainWindows.size,
+        lastUserActionTimeStampMs = lastUserActionTimeStampMs,
+      )
+      val json = status.toJson().toByteArray()
+      return GetRequestResult(
+        statusCode = 200,
+        statusText = "OK",
+        contentType = "text/json",
+        content = json,
+      )
+    }
+
     val resourceFileName = getResourceName(pathWithoutParams)
     val resourceBytes = getResource(resourceFileName)
 

projector-server-core/src/main/kotlin/org/jetbrains/projector/server/core/websocket/HttpWsServerBuilder.kt

@@ -33,10 +33,12 @@ import java.nio.ByteBuffer
 public class HttpWsServerBuilder(private val host: InetAddress, private val port: Int): WsTransportBuilder() {
 
   public lateinit var getMainWindows: () -> List<MainWindow>
+  public lateinit var getLastUserActionTimeStampMs: () -> Long
 
   override fun build(): HttpWsServer {
     val wsServer =  object : HttpWsServer(host, port) {
       override fun getMainWindows(): List<MainWindow> = this@HttpWsServerBuilder.getMainWindows()
+      override fun getLastUserActionTimeStampMs() = this@HttpWsServerBuilder.getLastUserActionTimeStampMs()
       override fun onError(connection: WebSocket?, e: Exception) = this@HttpWsServerBuilder.onError(connection, e)
       override fun onWsOpen(connection: WebSocket) = this@HttpWsServerBuilder.onWsOpen(connection)
       override fun onWsClose(connection: WebSocket) = this@HttpWsServerBuilder.onWsClose(connection)