Add: RequestContext field to abstract Request class

BREAKING CHANGE: Request is now an abstract class instead of an interface

src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/network/parser/Request.java

@@ -1,4 +1,24 @@
 package ch.unibas.dmi.dbis.cs108.casono.server.network.parser;
 
+import ch.unibas.dmi.dbis.cs108.casono.server.network.sessions.SessionId;
+
 /** Request, produced by the CommandParser */
-public interface Request {}
+public abstract class Request {
+    protected final RequestContext context;
+
+    public Request(RequestContext context) {
+        this.context = context;
+    }
+
+    public RequestContext getContext() {
+        return context;
+    }
+
+    public SessionId getSessionId() {
+        return context.sessionId();
+    }
+
+    public int getRequestId() {
+        return context.requestId();
+    }
+}