fuck it we're rendering blocks using webgl

src/main/java/dev/plex/request/impl/AssetsEndpoint.java

@@ -1,5 +1,6 @@
 package dev.plex.request.impl;
 
+import dev.plex.HTTPDModule;
 import dev.plex.request.AbstractServlet;
 import dev.plex.request.GetMapping;
 import dev.plex.request.MappingHeaders;
@@ -9,11 +10,15 @@ import jakarta.servlet.http.HttpServletResponse;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.util.regex.Pattern;
 
 public class AssetsEndpoint extends AbstractServlet
 {
-    private static final Pattern TEXTURE_PATH = Pattern.compile("(item|block)/[a-z0-9_]+\\.png");
+    private static final Pattern TEXTURE_PATH = Pattern.compile("((item|block)/[a-z0-9_]+|entity/shield/[a-z0-9_]+)\\.png");
+    private static final Pattern MODEL_PATH = Pattern.compile("(item|block)/[a-z0-9_]+\\.json");
+    private static final Pattern ITEM_DEF_PATH = Pattern.compile("[a-z0-9_]+\\.json");
 
 
     @GetMapping(endpoint = "/assets/dashboard.js")
@@ -37,6 +42,29 @@ public class AssetsEndpoint extends AbstractServlet
         return readFileReal(this.getClass().getResourceAsStream("/httpd/assets/player.js"));
     }
 
+    @GetMapping(endpoint = "/assets/blockrenderer.js")
+    @MappingHeaders(headers = {"content-type;application/javascript; charset=utf-8", "cache-control;public, max-age=300"})
+    public String blockRendererJs(HttpServletRequest request, HttpServletResponse response)
+    {
+        return readFileReal(this.getClass().getResourceAsStream("/httpd/assets/blockrenderer.js"));
+    }
+
+    @GetMapping(endpoint = "/assets/three.module.js")
+    @MappingHeaders(headers = {"content-type;application/javascript; charset=utf-8", "cache-control;public, max-age=86400"})
+    public String threeJs(HttpServletRequest request, HttpServletResponse response)
+    {
+        serveResource("/httpd/assets/three.module.js", response);
+        return null;
+    }
+
+    @GetMapping(endpoint = "/assets/three.core.js")
+    @MappingHeaders(headers = {"content-type;application/javascript; charset=utf-8", "cache-control;public, max-age=86400"})
+    public String threeCoreJs(HttpServletRequest request, HttpServletResponse response)
+    {
+        serveResource("/httpd/assets/three.core.js", response);
+        return null;
+    }
+
     @GetMapping(endpoint = "/assets/plexlogo.webp")
     @MappingHeaders(headers = {"content-type;image/webp", "cache-control;public, max-age=86400"})
     public String plexLogo(HttpServletRequest request, HttpServletResponse response)
@@ -49,23 +77,74 @@ public class AssetsEndpoint extends AbstractServlet
     @MappingHeaders(headers = {"content-type;image/png", "cache-control;public, max-age=86400"})
     public String texture(HttpServletRequest request, HttpServletResponse response)
     {
-        String uri = request.getRequestURI();
-        String prefix = "/assets/textures/";
-        if (!uri.startsWith(prefix))
-        {
-            response.setStatus(HttpServletResponse.SC_NOT_FOUND);
-            return null;
-        }
-        String resourcePath = uri.substring(prefix.length());
-        if (!TEXTURE_PATH.matcher(resourcePath).matches())
-        {
-            response.setStatus(HttpServletResponse.SC_NOT_FOUND);
-            return null;
-        }
-        serveResource("/httpd/assets/textures/" + resourcePath, response);
+        servePathUnder(request, response, "/assets/textures/", TEXTURE_PATH, "textures", "/httpd/assets/textures/");
         return null;
     }
 
+    @GetMapping(endpoint = "/assets/models/")
+    @MappingHeaders(headers = {"content-type;application/json; charset=utf-8", "cache-control;public, max-age=86400"})
+    public String model(HttpServletRequest request, HttpServletResponse response)
+    {
+        servePathUnder(request, response, "/assets/models/", MODEL_PATH, "models", "/httpd/assets/models/");
+        return null;
+    }
+
+    @GetMapping(endpoint = "/assets/items/")
+    @MappingHeaders(headers = {"content-type;application/json; charset=utf-8", "cache-control;public, max-age=86400"})
+    public String itemDef(HttpServletRequest request, HttpServletResponse response)
+    {
+        servePathUnder(request, response, "/assets/items/", ITEM_DEF_PATH, "items", "/httpd/assets/items/");
+        return null;
+    }
+
+    private static void servePathUnder(HttpServletRequest request, HttpServletResponse response, String urlPrefix, Pattern allowed, String cacheCategory, String resourcePrefix)
+    {
+        String uri = request.getRequestURI();
+        if (!uri.startsWith(urlPrefix))
+        {
+            response.setStatus(HttpServletResponse.SC_NOT_FOUND);
+            return;
+        }
+        String rest = uri.substring(urlPrefix.length());
+        if (!allowed.matcher(rest).matches())
+        {
+            response.setStatus(HttpServletResponse.SC_NOT_FOUND);
+            return;
+        }
+        if (currentStaff(request) == null)
+        {
+            response.setStatus(HttpServletResponse.SC_FORBIDDEN);
+            return;
+        }
+        if (serveCached(cacheCategory, rest, response))
+        {
+            return;
+        }
+        serveResource(resourcePrefix + rest, response);
+    }
+
+    private static boolean serveCached(String category, String relativePath, HttpServletResponse response)
+    {
+        if (HTTPDModule.getMinecraftAssetsManager() == null)
+        {
+            return false;
+        }
+        Path path = HTTPDModule.getMinecraftAssetsManager().resolve(category, relativePath);
+        if (path == null)
+        {
+            return false;
+        }
+        try (OutputStream out = response.getOutputStream())
+        {
+            Files.copy(path, out);
+            return true;
+        }
+        catch (IOException ignored)
+        {
+            return false;
+        }
+    }
+
     private static void serveResource(String classpathPath, HttpServletResponse response)
     {
         try (InputStream in = AssetsEndpoint.class.getResourceAsStream(classpathPath);