Lay the groundwork for some new features

server/src/main/kotlin/Main.kt

@@ -7,41 +7,62 @@ import java.util.UUID
 
 import java.io.File
 import java.io.BufferedReader
-/*
+
+import java.math.BigInteger
+import java.security.MessageDigest
+
+fun md5(input:String): String {
+    val md = MessageDigest.getInstance("MD5")
+    return BigInteger(1, md.digest(input.toByteArray())).toString(16).padStart(32, '0')
+}
+
 object WsSessionManager {
-    val sessions = ConcurrentHashMap<String, WsContext>()
+    private val sessions = ConcurrentHashMap<WsContext, String>()
-    fun addSession(sessionID: String, ctx: WsContext) {
+    private val sessionIds = ConcurrentHashMap<String, WsContext>()
-        sessions[sessionID] = ctx
-    }
-    fun removeSession(sessionID: String) {
-        sessions.remove(sessionID)
-    }
-    fun broadcast(message: String) {
-        sessions.values.forEach { ctx ->
-            ctx.send(message)
-        }
-    }
-}
-*/
-object WsSessionManager {
-    private val sessions = ConcurrentHashMap<String, WsContext>()
 
     fun addSession(ctx: WsContext) {
-        // Generate our own UUID for the session since we can't access Javalin's private sessionId
+        try {
             val sessionId = UUID.randomUUID().toString()
-        sessions[sessionId] = ctx
+            sessions[ctx] = sessionId
+            sessionIds[sessionId] = ctx
+        } catch (e: Exception) {
+            println("Error adding session: ${e.message}")
+        }
     }
 
     fun removeSession(ctx: WsContext) {
-        // Find and remove the session by context
+        try {
-        sessions.entries.removeIf { it.value === ctx }
+            val sessionId = sessions[ctx]
+            if (sessionId != null) {
+                sessions.remove(ctx)
+                sessionIds.remove(sessionId)
+            }
+        } catch (e: Exception) {
+            println("Error removing session: ${e.message}")
+        }
     }
 
     fun broadcast(message: String) {
-        sessions.values.forEach { ctx ->
+        val deadSessions = mutableListOf<WsContext>()
+        
+        sessions.keys.forEach { ctx ->
+            try {
+                if (ctx.session.isOpen) {
                     ctx.send(message)
+                } else {
+                    deadSessions.add(ctx)
+                }
+            } catch (e: Exception) {
+                println("Error broadcasting to session: ${e.message}")
+                deadSessions.add(ctx)
             }
         }
+        
+        // Clean up any dead sessions
+        deadSessions.forEach { removeSession(it) }
+    }
+
+    fun getSessionCount(): Int = sessions.size
 }
 
 fun extractMessageContent(inputData: String): String {
@@ -79,6 +100,7 @@ fun handleSentMessage(inputData: String): String {
     var token = ""
     var message = ""
     var dataType = ""
+    var command = ""
     var isParsingData = 0
     for (char in inputData) {
         val character = char
@@ -95,6 +117,8 @@ fun handleSentMessage(inputData: String): String {
                     token += character
                 } else if (dataType == "message") {
                     message += character
+                } else if (dataType == "command") {
+                    command += character
                 }
             }
         } else {
@@ -120,6 +144,7 @@ fun handleSentMessage(inputData: String): String {
  
     var usernameInDatabase = ""
     var tokenInDatabase = ""
+    var saltInDatabase = ""
     var currentStage = 0
     for (char in userLine) {
         if (char == ':') {
@@ -129,9 +154,16 @@ fun handleSentMessage(inputData: String): String {
             usernameInDatabase += char
         } else if (currentStage == 1) {
             tokenInDatabase += char
+        } else if (currentStage == 2) {
+            saltInDatabase += char
         }
     }
     tokenInDatabase = tokenInDatabase.replace(":", "")
+    saltInDatabase = saltInDatabase.replace(":", "")
+    val tokenWithSalt = (md5(token + saltInDatabase))
+    /*println(saltInDatabase)
+    println(tokenWithSalt)
+    if (tokenWithSalt != tokenInDatabase)  {*/
     if (token != tokenInDatabase) {
         return("Invalid token! Please try putting in your password right")
     }
@@ -359,6 +391,7 @@ fun authKey(inputData: String): String {
 }
 
 fun main(args: Array<String>) {
+    var users = listOf("")
     val app = Javalin.create()
         .get("/") { ctx -> ctx.result("dingus") }
         .get("/api/send/{content}") { ctx -> 
@@ -372,10 +405,10 @@ fun main(args: Array<String>) {
         .get("/api/createaccount/{content}") { ctx -> ctx.result(createAccount(ctx.pathParam("content")))}
         .get("/api/syncmessages/{content}") { ctx -> ctx.result(syncMessages(ctx.pathParam("content")))}
         .get("/api/authkey/{content}") { ctx -> ctx.result(authKey(ctx.pathParam("content")))}
+        
         .ws("/api/websocket") { ws -> 
             ws.onConnect { ctx -> 
                 WsSessionManager.addSession(ctx)
-                ctx.send("Websocket success")
             }
             ws.onClose { ctx ->
                 WsSessionManager.removeSession(ctx)
@@ -384,52 +417,18 @@ fun main(args: Array<String>) {
                 println(ctx.message()) 
                 val successState = handleSentMessage(ctx.message())
                 if (successState != "Success") {
+                    try {
                         ctx.send(successState)
+                    } catch (e: Exception) {
+                        println("Error sending error message: ${e.message}")
+                    }
                 } else {
-                    // Broadcast the message to all clients if successful
                     val messageContent = extractMessageContent(ctx.message())
                     WsSessionManager.broadcast(messageContent)
-                    ctx.send("Message sent successfully")
                 }
             } 
         }
     .start(7070)
+
 }
 
-/*
-fun main(args: Array<String>) {
-    val app = Javalin.create()
-        .get("/") { ctx -> ctx.result("dingus") }
-        .get("/api/send/{content}") { ctx -> 
-            val result = handleSentMessage(ctx.pathParam("content"))
-            if (result == "Success") {
-                val messageContent = extractMessageContent(ctx.pathParam("content")
-                WsSessionManager.broadcast(messageContent)
-            ctx.result(result)
-            }
-        }
-        .get("/api/createaccount/{content}") { ctx -> ctx.result(createAccount(ctx.pathParam("content")))}
-        .get("/api/syncmessages/{content}") { ctx -> ctx.result(syncMessages(ctx.pathParam("content")))}
-        .get("/api/authkey/{content}") { ctx -> ctx.result(authKey(ctx.pathParam("content")))}
-        .ws("/api/websocket") { ws -> 
-            ws.onConnect { ctx -> 
-                WsSessionManager.addSession(ctx.sessionId, ctx)
-                ctx.send("Websocket success")
-            }
-            ws.onClose { ctx ->
-                WsSessionManager.removeSession(ctx.sessionId)
-            }
-            ws.onMessage { ctx -> 
-                println(ctx.message()) 
-                val successState = handleSentMessage(ctx.message())
-                if (successState != "Success") {
-                    ctx.send(successState)
-                } else {
-                    ctx.send("Message sent successfully")
-                }
-            } 
-        }
-    .start(7070)
-}*/
-
-