impl ws kill

cmd/server/usergameserver.go

@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"log"
+	"slices"
 	"time"
 )
 
@@ -79,7 +80,34 @@ func (ugs *UserGameServer) listen(ctx context.Context, reader func(context.Conte
 				return err
 			}
 		} else if killOccurred := m["k"] != ""; killOccurred {
-			return fmt.Errorf("not impl: a kill occurred: %+v", m)
+			victimName := m["name"]
+			word := m["k"]
+			if word == "" {
+				return fmt.Errorf("expected .k")
+			}
+
+			killer := ugs.Session.ID
+			victim, err := ugs.games.UserByName(ctx, ugs.ID, victimName)
+			if err != nil {
+				return err
+			}
+
+			var points int
+			if gameState, err := ugs.games.GameState(ctx, ugs.ID); err != nil {
+				return err
+			} else if global := gameState.Players[killer].KillWords.Global; global.Word == word {
+				points = global.Points
+			} else if matches := slices.DeleteFunc(gameState.Players[victim].KillWords.Publics(), func(kw KillWord) bool { return kw.Word != word }); len(matches) > 0 {
+				points = matches[0].Points
+			} else if matches := slices.DeleteFunc(gameState.Players[victim].KillWords.Privates(), func(kw KillWord) bool { return kw.Word != word }); len(matches) > 0 {
+				points = matches[0].Points
+			} else {
+				return fmt.Errorf("refusing unexpected .k")
+			}
+
+			if err := ugs.games.CreateEventAssignmentRotation(ctx, ugs.ID, killer, victim, word, points); err != nil {
+				return err
+			}
 		} else if isRename := m["name"] != ""; isRename {
 			if err := ugs.games.UpdateUserName(ctx, ugs.Session.ID, m["name"]); err != nil {
 				return err