UpdateMonitor: Fix authentication with update monitor

backend/src/main/java/net/buzzert/kordophone/backend/server/APIClient.kt

@@ -1,6 +1,5 @@
 package net.buzzert.kordophone.backend.server
 
-import com.google.gson.Gson
 import kotlinx.coroutines.runBlocking
 import okhttp3.Authenticator
 import okhttp3.HttpUrl
@@ -13,14 +12,13 @@ import okhttp3.WebSocket
 import okhttp3.WebSocketListener
 import retrofit2.Retrofit
 import retrofit2.converter.gson.GsonConverterFactory
-import retrofit2.create
 import java.net.URL
 
 interface APIClient {
     fun getAPIInterface(): APIInterface
     fun getWebSocketClient(
         serverPath: String,
-        authToken: String? = null,
+        queryParams: Map<String, String>?,
         listener: WebSocketListener
     ): WebSocket
 }
@@ -109,24 +107,35 @@ class RetrofitAPIClient(
         return retrofit.create(APIInterface::class.java)
     }
 
-    override fun getWebSocketClient(serverPath: String, authToken: String?, listener: WebSocketListener): WebSocket {
-        val requestURL = baseURL.authenticatedWebSocketURL(serverPath, authToken)
+    override fun getWebSocketClient(
+        serverPath: String,
+        queryParams: Map<String, String>?,
+        listener: WebSocketListener
+    ): WebSocket {
+        val params = (queryParams ?: hashMapOf<String, String>()).toMutableMap()
+
+        val authToken = tokenStore.authenticationToken
+        if (authToken != null) {
+            params["token"] = authToken
+        }
+
+        val requestURL = baseURL.authenticatedWebSocketURL(serverPath, params)
         val request = Request.Builder()
             .url(requestURL)
             .build()
 
-        return OkHttpClient().newWebSocket(request, listener)
+        return client.newWebSocket(request, listener)
     }
 }
 
-fun URL.authenticatedWebSocketURL(serverPath: String, authToken: String? = null): URL {
+fun URL.authenticatedWebSocketURL(serverPath: String, params: Map<String, String>): URL {
     val baseURI = HttpUrl.parse(this.toString())!!
     val requestURL = baseURI.newBuilder()
         .host(baseURI.host())
         .addEncodedPathSegments(serverPath)
 
-    if (authToken != null) {
-        requestURL.addQueryParameter("token", authToken)
+    params.forEach { (key, value) ->
+        requestURL.addQueryParameter(key, value)
     }
 
     return URL(requestURL.build().toString())

backend/src/main/java/net/buzzert/kordophone/backend/server/UpdateMonitor.kt

@@ -17,9 +17,7 @@ import okhttp3.Response
 import okhttp3.WebSocket
 import okhttp3.WebSocketListener
 import okio.ByteString
-import retrofit2.converter.gson.GsonConverterFactory
 import java.lang.reflect.Type
-import kotlin.time.Duration
 
 const val UPMON_LOG: String = "UpdateMonitor"
 
@@ -36,13 +34,18 @@ class UpdateMonitor(private val client: APIClient) : WebSocketListener() {
     private val updateItemsType: Type = object : TypeToken<ArrayList<UpdateItem>>() {}.type
     private var webSocket: WebSocket? = null
     private var needsSocketReconnect: Boolean = false
+    private var messageSeq: Int = -1
 
     private val _conversationChanged: MutableSharedFlow<Conversation> = MutableSharedFlow()
     private val _messageAdded: MutableSharedFlow<Message> = MutableSharedFlow()
 
     fun beginMonitoringUpdates() {
         Log.d(UPMON_LOG, "Opening websocket connection")
-        this.webSocket = client.getWebSocketClient("/updates", null, this)
+        this.webSocket = client.getWebSocketClient(
+            serverPath = "/updates",
+            queryParams = mapOf("seq" to messageSeq.toString()),
+            listener = this
+        )
     }
 
     fun stopMonitoringForUpdates() {
@@ -65,6 +68,10 @@ class UpdateMonitor(private val client: APIClient) : WebSocketListener() {
                     it.conversation = conversationChanged!!
                 })
             }
+
+            if (updateItem.sequence > messageSeq) {
+                messageSeq = updateItem.sequence
+            }
         }
     }