fixed preview

src/components/StaticBoardPreview.tsx

@@ -0,0 +1,167 @@
+import { useEffect, useState } from "react";
+import { Application, Container, Sprite, Texture } from "pixi.js";
+import type { ServerGame, ClientGame } from "../../shared/game";
+import { useTheme } from "../themes/useTheme";
+import { themes } from "../themes";
+import { getValue, isServerGame } from "../../shared/game";
+import type { LoadedTexture, LoadedTheme } from "../themes/Theme";
+import { weightedPickRandom } from "../../shared/utils";
+import gen from "random-seed";
+
+// Cache for static board previews with size limit
+const MAX_CACHE_SIZE = 250;
+const previewCache = new Map<string, string>();
+
+// Helper function to manage cache size
+const addToCache = (key: string, value: string) => {
+  // If cache is at max size, remove the oldest entry
+  if (previewCache.size >= MAX_CACHE_SIZE) {
+    const firstKey = previewCache.keys().next().value;
+    if (firstKey) {
+      previewCache.delete(firstKey);
+    }
+  }
+  previewCache.set(key, value);
+};
+
+interface StaticBoardPreviewProps {
+  game: ServerGame | ClientGame;
+  width: number;
+  height: number;
+  className?: string;
+}
+
+const StaticBoardPreview: React.FC<StaticBoardPreviewProps> = ({
+  game,
+  width,
+  height,
+  className,
+}) => {
+  const [imageUrl, setImageUrl] = useState<string | null>(null);
+  const theme = useTheme(themes.find((t) => t.id === game.theme)!.theme);
+
+  useEffect(() => {
+    if (!theme) return;
+
+    // Generate a cache key based on game state and dimensions
+    const cacheKey = `${game.theme}-${game.uuid}-${width}x${height}`;
+
+    // Check if we have a cached image
+    const cachedImage = previewCache.get(cacheKey);
+    if (cachedImage) {
+      setImageUrl(cachedImage);
+      return;
+    }
+
+    const generateStaticImage = async () => {
+      // Create a temporary Pixi application for rendering
+      const app = new Application();
+      await app.init({
+        width,
+        height,
+        backgroundAlpha: 0,
+        preference: "webgl",
+      });
+
+      const container = new Container();
+      app.stage.addChild(container);
+
+      // Helper function to resolve sprites
+      const resolveSprite = (lt: LoadedTexture, x: number, y: number) => {
+        if (Array.isArray(lt)) {
+          const rng = gen.create(game.uuid + ";" + x + ";" + y);
+          return weightedPickRandom(
+            lt,
+            (i) => i.weight,
+            (tw) => rng.floatBetween(0, tw),
+          ).sprite;
+        }
+        return lt;
+      };
+
+      // Render all tiles
+      for (let i = 0; i < game.width; i++) {
+        for (let j = 0; j < game.height; j++) {
+          const isRevealed = game.isRevealed[i][j];
+          const value = isServerGame(game)
+            ? getValue(game.mines, i, j)
+            : game.values[i][j];
+          const isMine = isServerGame(game) ? game.mines[i][j] : false;
+          const isFlagged = game.isFlagged[i][j];
+          const isQuestionMark = game.isQuestionMark[i][j];
+
+          // Base tile
+          const baseTexture =
+            isRevealed || (isMine && !isFlagged)
+              ? resolveSprite(theme.revealed, i, j)
+              : resolveSprite(theme.tile, i, j);
+
+          const baseSprite = new Sprite(baseTexture);
+          baseSprite.x = i * theme.size;
+          baseSprite.y = j * theme.size;
+          container.addChild(baseSprite);
+
+          // Content overlay
+          let contentTexture: Texture | null = null;
+          if (isFlagged) {
+            contentTexture = resolveSprite(theme.flag, i, j);
+          } else if (isMine) {
+            contentTexture = resolveSprite(theme.mine, i, j);
+          } else if (value !== -1 && isRevealed) {
+            const numberTexture = theme[
+              value.toString() as keyof LoadedTheme
+            ] as Texture;
+            if (numberTexture) {
+              contentTexture = numberTexture;
+            }
+          } else if (isQuestionMark) {
+            contentTexture = resolveSprite(theme.questionMark, i, j);
+          }
+
+          if (contentTexture) {
+            const contentSprite = new Sprite(contentTexture);
+            contentSprite.x = i * theme.size + theme.size * 0.5;
+            contentSprite.y = j * theme.size + theme.size * 0.5;
+            contentSprite.anchor.set(0.5);
+            container.addChild(contentSprite);
+          }
+        }
+      }
+
+      // Render to canvas and create data URL
+      app.renderer.render(container);
+      const canvas = app.canvas;
+      const dataUrl = canvas.toDataURL();
+
+      // Cache the generated image
+      addToCache(cacheKey, dataUrl);
+      setImageUrl(dataUrl);
+
+      // Clean up
+      app.destroy(true);
+    };
+
+    generateStaticImage().catch(console.error);
+  }, [game, theme, width, height]);
+
+  if (!imageUrl) {
+    return (
+      <div
+        className={className}
+        style={{ width, height, backgroundColor: "#1a1a1a" }}
+      />
+    );
+  }
+
+  return (
+    <img
+      src={imageUrl}
+      alt="Board preview"
+      className={className}
+      style={{ width, height, imageRendering: "pixelated" }}
+    />
+  );
+};
+
+export default StaticBoardPreview;
+

src/views/collection/Collection.tsx

@@ -1,6 +1,7 @@
 import { Ellipsis } from "lucide-react";
 import { testBoard } from "../../../shared/testBoard";
 import { Board } from "../../components/LazyBoard";
+import StaticBoardPreview from "../../components/StaticBoardPreview";
 import { Button } from "../../components/Button";
 import { themes } from "../../themes";
 import {
@@ -11,7 +12,7 @@ import {
 } from "../../components/DropdownMenu";
 import { cn } from "../../lib/utils";
 import { useWSMutation, useWSQuery } from "../../hooks";
-import { Suspense } from "react";
+import { Suspense, useState } from "react";
 
 const Collection = () => {
   const { data: collection, refetch } = useWSQuery(
@@ -20,6 +21,7 @@ const Collection = () => {
   );
   const mutateSelected = useWSMutation("user.selectCollectionEntry");
   const mutateShuffle = useWSMutation("user.addCollectionEntryToShuffle");
+  const [hoveredTheme, setHoveredTheme] = useState<string | null>(null);
 
   return (
     <div className="flex flex-col gap-4 w-full">
@@ -76,6 +78,11 @@ const Collection = () => {
                   </DropdownMenu>
                 )}
               </div>
+              <div
+                onMouseEnter={() => setHoveredTheme(theme.id)}
+                onMouseLeave={() => setHoveredTheme(null)}
+              >
+                {hoveredTheme === theme.id ? (
                   <Suspense>
                     <Board
                       game={testBoard(theme.id)}
@@ -89,6 +96,17 @@ const Collection = () => {
                       )}
                     />
                   </Suspense>
+                ) : (
+                  <StaticBoardPreview
+                    game={testBoard(theme.id)}
+                    width={11 * 32}
+                    height={4 * 32}
+                    className={cn(
+                      selected && "outline-primary outline-4 rounded-md",
+                    )}
+                  />
+                )}
+              </div>
             </div>
           );
         })}