src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/ServerApp.java

@@ -3,6 +3,9 @@ package ch.unibas.dmi.dbis.cs108.casono.server;
 import ch.unibas.dmi.dbis.cs108.casono.server.app.commands.check_nick.CheckUsernameHandler;
 import ch.unibas.dmi.dbis.cs108.casono.server.app.commands.check_nick.CheckUsernameParser;
 import ch.unibas.dmi.dbis.cs108.casono.server.app.commands.check_nick.CheckUsernameRequest;
+import ch.unibas.dmi.dbis.cs108.casono.server.app.commands.login.LoginHandler;
+import ch.unibas.dmi.dbis.cs108.casono.server.app.commands.login.LoginParser;
+import ch.unibas.dmi.dbis.cs108.casono.server.app.commands.login.LoginRequest;
 import ch.unibas.dmi.dbis.cs108.casono.server.app.commands.ping.PingHandler;
 import ch.unibas.dmi.dbis.cs108.casono.server.app.commands.ping.PingParser;
 import ch.unibas.dmi.dbis.cs108.casono.server.app.commands.ping.PingRequest;
@@ -91,5 +94,9 @@ public class ServerApp {
         commandRouter.register(
                 CheckUsernameRequest.class,
                 new CheckUsernameHandler(responseDispatcher, userRegistry));
+
+        parserDispatcher.register("LOGIN", new LoginParser());
+        commandRouter.register(
+                LoginRequest.class, new LoginHandler(responseDispatcher, userRegistry));
     }
 }

src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/app/commands/login/LoginHandler.java

@@ -0,0 +1,24 @@
+package ch.unibas.dmi.dbis.cs108.casono.server.app.commands.login;
+
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.user.User;
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.user.UserFactory;
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.user.UserRegistry;
+import ch.unibas.dmi.dbis.cs108.casono.server.network.command.execution.CommandHandler;
+import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.response.dispatcher.ResponseDispatcher;
+
+public class LoginHandler implements CommandHandler<LoginRequest> {
+    private final ResponseDispatcher responseDispatcher;
+    private final UserFactory userFactory;
+
+    public LoginHandler(ResponseDispatcher responseDispatcher, UserRegistry userRegistry) {
+        this.responseDispatcher = responseDispatcher;
+        this.userFactory = new UserFactory(userRegistry);
+    }
+
+    @Override
+    public void execute(LoginRequest request) {
+        User user = userFactory.create(request.getUsername(), request.getContext().sessionId());
+        responseDispatcher.dispatch(
+                new LoginResponse(request.getContext(), user.getName(), user.getId()));
+    }
+}

src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/app/commands/login/LoginParser.java

@@ -0,0 +1,14 @@
+package ch.unibas.dmi.dbis.cs108.casono.server.app.commands.login;
+
+import ch.unibas.dmi.dbis.cs108.casono.server.network.command.parsing.CommandParser;
+import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.request.PrimitiveRequest;
+import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.request.accessor.RequestParameterAccessor;
+
+public class LoginParser implements CommandParser<LoginRequest> {
+    @Override
+    public LoginRequest parse(PrimitiveRequest primitiveRequest) {
+        RequestParameterAccessor accessor =
+                new RequestParameterAccessor(primitiveRequest.parameters());
+        return new LoginRequest(primitiveRequest.context(), accessor.require("USERNAME"));
+    }
+}

src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/app/commands/login/LoginRequest.java

@@ -0,0 +1,17 @@
+package ch.unibas.dmi.dbis.cs108.casono.server.app.commands.login;
+
+import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.request.Request;
+import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.request.RequestContext;
+
+public class LoginRequest extends Request {
+    private final String username;
+
+    public LoginRequest(RequestContext context, String username) {
+        super(context);
+        this.username = username;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+}

src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/app/commands/login/LoginResponse.java

@@ -0,0 +1,17 @@
+package ch.unibas.dmi.dbis.cs108.casono.server.app.commands.login;
+
+import ch.unibas.dmi.dbis.cs108.casono.server.domain.user.UserId;
+import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.request.RequestContext;
+import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.response.SuccessResponse;
+import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.response.builder.ResponseBodyBuilder;
+
+public class LoginResponse extends SuccessResponse {
+    public LoginResponse(RequestContext context, String assignedUsername, UserId id) {
+        super(
+                context,
+                new ResponseBodyBuilder()
+                        .param("USERNAME", assignedUsername)
+                        .param("ID", id.value())
+                        .build());
+    }
+}