From 369000961ab65044c68d13134e168830e5890669 Mon Sep 17 00:00:00 2001
From: Arkadiusz Sygulski <arkadiusz@sygulski.pl>
Date: Fri, 20 Feb 2026 23:38:23 +0100
Subject: [PATCH] View Transition

---
 src/client/GameModeSelector.ts       | 50 +++++++++++++++++++++++-----
 src/client/components/PlayPage.ts    |  2 +-
 src/client/styles/core/variables.css |  5 +++
 src/core/configuration/DevConfig.ts  |  2 +-
 src/server/MasterLobbyService.ts     |  6 ++--
 5 files changed, 53 insertions(+), 12 deletions(-)

diff --git a/src/client/GameModeSelector.ts b/src/client/GameModeSelector.ts
index 04f9e12d8..bf5e8e2cc 100644
--- a/src/client/GameModeSelector.ts
+++ b/src/client/GameModeSelector.ts
@@ -24,6 +24,7 @@ const CARD_BG = "bg-sky-950";
 export class GameModeSelector extends LitElement {
   @state() private lobbies: PublicGames | null = null;
   private serverTimeOffset: number = 0;
+  private prevGameIds: string = "";
 
   private lobbySocket = new PublicLobbySocket((lobbies) =>
     this.handleLobbiesUpdate(lobbies),
@@ -69,14 +70,45 @@ export class GameModeSelector extends LitElement {
   }
 
   private handleLobbiesUpdate(lobbies: PublicGames) {
-    this.lobbies = lobbies;
-    this.serverTimeOffset = lobbies.serverTime - Date.now();
-    document.dispatchEvent(
-      new CustomEvent("public-lobbies-update", {
-        detail: { payload: lobbies },
-      }),
-    );
-    this.requestUpdate();
+    const newIds = this.extractSortedGameIds(lobbies);
+    const gameListChanged =
+      this.prevGameIds !== "" && newIds !== this.prevGameIds;
+    this.prevGameIds = newIds;
+
+    const applyUpdate = () => {
+      this.lobbies = lobbies;
+      this.serverTimeOffset = lobbies.serverTime - Date.now();
+      document.dispatchEvent(
+        new CustomEvent("public-lobbies-update", {
+          detail: { payload: lobbies },
+        }),
+      );
+      this.requestUpdate();
+    };
+
+    if (
+      gameListChanged &&
+      "startViewTransition" in document &&
+      typeof (document as any).startViewTransition === "function"
+    ) {
+      (document as any).startViewTransition(async () => {
+        applyUpdate();
+        await this.updateComplete;
+      });
+    } else {
+      applyUpdate();
+    }
+  }
+
+  private extractSortedGameIds(lobbies: PublicGames): string {
+    const ffa = lobbies.games?.["ffa"]?.[0];
+    const teams = lobbies.games?.["team"]?.[0];
+    const special = lobbies.games?.["special"]?.[0];
+    return [ffa, teams, special]
+      .filter((g): g is PublicGameInfo => !!g)
+      .sort((a, b) => a.startsAt - b.startsAt)
+      .map((g) => g.gameID)
+      .join(",");
   }
 
   private getSortedLobbies(): PublicGameInfo[] {
@@ -214,6 +246,7 @@ export class GameModeSelector extends LitElement {
     return html`
       <button
         @click=${() => this.validateAndJoin(lobby)}
+        style="view-transition-name: game-${lobby.gameID}"
         class="group relative w-full aspect-square text-white uppercase rounded-2xl overflow-hidden transition-transform duration-200 hover:scale-[1.01] active:scale-[0.99] ring-1 ring-sky-400/30 shadow-[0_0_25px_-2px_rgba(56,189,248,0.2)] ${CARD_BG}"
       >
         ${mapImageSrc
@@ -293,6 +326,7 @@ export class GameModeSelector extends LitElement {
     return html`
       <button
         @click=${() => this.validateAndJoin(lobby)}
+        style="view-transition-name: game-${lobby.gameID}"
         class="group relative w-full flex-1 text-white uppercase rounded-xl overflow-hidden transition-transform duration-200 hover:scale-[1.01] active:scale-[0.99] ${CARD_BG}"
       >
         ${mapImageSrc
diff --git a/src/client/components/PlayPage.ts b/src/client/components/PlayPage.ts
index 6386b1662..bebdfbdb0 100644
--- a/src/client/components/PlayPage.ts
+++ b/src/client/components/PlayPage.ts
@@ -11,7 +11,7 @@ export class PlayPage extends LitElement {
     return html`
       <div
         id="page-play"
-        class="flex flex-col gap-2 w-full lg:max-w-6xl mx-auto px-0 lg:px-4 lg:my-auto min-h-0"
+        class="flex flex-col gap-4 w-full lg:max-w-6xl mx-auto px-0 lg:px-4 lg:my-auto min-h-0"
       >
         <token-login class="absolute"></token-login>
 
diff --git a/src/client/styles/core/variables.css b/src/client/styles/core/variables.css
index 6ed17b5d6..b880fbfca 100644
--- a/src/client/styles/core/variables.css
+++ b/src/client/styles/core/variables.css
@@ -37,3 +37,8 @@
   --medal-impossible: #d32f2f;
   --medal-custom: #2196f3;
 }
+
+::view-transition-group(*) {
+  animation-duration: 500ms;
+  animation-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
+}
diff --git a/src/core/configuration/DevConfig.ts b/src/core/configuration/DevConfig.ts
index 09c0adaa6..8906d8446 100644
--- a/src/core/configuration/DevConfig.ts
+++ b/src/core/configuration/DevConfig.ts
@@ -25,7 +25,7 @@ export class DevServerConfig extends DefaultServerConfig {
   }
 
   gameCreationRate(): number {
-    return 5 * 1000;
+    return 30 * 1000;
   }
 
   numWorkers(): number {
diff --git a/src/server/MasterLobbyService.ts b/src/server/MasterLobbyService.ts
index 0dfe89285..9c78a3617 100644
--- a/src/server/MasterLobbyService.ts
+++ b/src/server/MasterLobbyService.ts
@@ -112,7 +112,9 @@ export class MasterLobbyService {
   private async maybeScheduleLobby() {
     const lobbiesByType = this.getAllLobbies();
 
-    for (const type of Object.keys(lobbiesByType) as PublicGameType[]) {
+    const types = Object.keys(lobbiesByType) as PublicGameType[];
+    for (let i = 0; i < types.length; i++) {
+      const type = types[i];
       const lobbies = lobbiesByType[type];
       if (lobbies.length >= 2) {
         continue;
@@ -120,7 +122,7 @@ export class MasterLobbyService {
 
       const lastStart = lobbies.reduce(
         (max, pb) => Math.max(max, pb.startsAt),
-        Date.now(),
+        Date.now() + i * 10_000,
       );
 
       const gameID = generateID();