Add map editor save and deploy actions

tools/map_editor/server.js

@@ -0,0 +1,154 @@
+const http = require("http");
+const fs = require("fs");
+const path = require("path");
+const { URL } = require("url");
+
+const repoRoot = path.resolve(__dirname, "..", "..");
+const port = Number(process.env.MAP_EDITOR_PORT || process.env.PORT || 8787);
+
+const contentTypes = {
+  ".html": "text/html; charset=utf-8",
+  ".js": "text/javascript; charset=utf-8",
+  ".css": "text/css; charset=utf-8",
+  ".map": "text/plain; charset=utf-8",
+  ".png": "image/png",
+  ".jpg": "image/jpeg",
+  ".jpeg": "image/jpeg",
+  ".gif": "image/gif",
+  ".svg": "image/svg+xml",
+  ".json": "application/json; charset=utf-8",
+};
+
+const sourceMapPath = path.join(repoRoot, "game", "assets", "map", "stage_01.map");
+const deployTargets = [
+  sourceMapPath,
+  path.join(repoRoot, "build", "windows", "x64", "release", "assets", "map", "stage_01.map"),
+  path.join(repoRoot, "build", "switch", "aarch64", "release", "switch_game", "assets", "map", "stage_01.map"),
+  path.join(repoRoot, "build", "switch", "aarch64", "release", "switch_game", "romfs", "assets", "map", "stage_01.map"),
+];
+
+const server = http.createServer(async (request, response) => {
+  try {
+    const url = new URL(request.url, `http://${request.headers.host || "localhost"}`);
+    if (url.pathname === "/api/map-editor/status" && request.method === "GET") {
+      sendJson(response, 200, { ok: true, writable: true });
+      return;
+    }
+    if (url.pathname === "/api/map-editor/save" && request.method === "POST") {
+      const { mapText } = await readJsonBody(request);
+      const targets = writeMapToTargets(mapText, [sourceMapPath]);
+      sendJson(response, 200, { ok: true, targets });
+      return;
+    }
+    if (url.pathname === "/api/map-editor/deploy" && request.method === "POST") {
+      const { mapText } = await readJsonBody(request);
+      const targets = writeMapToTargets(mapText, deployTargets, { skipMissingParents: true });
+      sendJson(response, 200, { ok: true, targets });
+      return;
+    }
+    if (request.method !== "GET" && request.method !== "HEAD") {
+      sendJson(response, 405, { ok: false, error: "Method not allowed" });
+      return;
+    }
+    serveStatic(url.pathname, request, response);
+  } catch (error) {
+    sendJson(response, 500, { ok: false, error: error.message });
+  }
+});
+
+server.listen(port, "127.0.0.1", () => {
+  console.log(`Map editor: http://127.0.0.1:${port}/tools/map_editor/`);
+});
+
+function writeMapToTargets(mapText, targets, options = {}) {
+  validateMapText(mapText);
+  const written = [];
+  for (const target of targets) {
+    const parent = path.dirname(target);
+    if (options.skipMissingParents && !fs.existsSync(parent)) continue;
+    fs.mkdirSync(parent, { recursive: true });
+    fs.writeFileSync(target, normalizeText(mapText), "utf8");
+    written.push(path.relative(repoRoot, target).replace(/\\/g, "/"));
+  }
+  return written;
+}
+
+function validateMapText(mapText) {
+  if (typeof mapText !== "string" || !mapText.trim()) {
+    throw new Error("mapText is empty");
+  }
+  if (!/^map\s+\S+/m.test(mapText) || !/^world\s+[-.\d]+\s+[-.\d]+/m.test(mapText)) {
+    throw new Error("mapText does not look like a .map file");
+  }
+}
+
+function normalizeText(text) {
+  return `${text.replace(/\r\n/g, "\n").replace(/\s+$/g, "")}\n`;
+}
+
+function serveStatic(urlPath, request, response) {
+  const pathname = decodeURIComponent(urlPath === "/" ? "/tools/map_editor/" : urlPath);
+  const relative = pathname.replace(/^\/+/, "");
+  const target = path.resolve(repoRoot, relative);
+  if (!target.startsWith(repoRoot + path.sep) && target !== repoRoot) {
+    sendText(response, 403, "Forbidden");
+    return;
+  }
+
+  let filePath = target;
+  if (fs.existsSync(filePath) && fs.statSync(filePath).isDirectory()) {
+    filePath = path.join(filePath, "index.html");
+  }
+  if (!fs.existsSync(filePath) || !fs.statSync(filePath).isFile()) {
+    sendText(response, 404, "Not found");
+    return;
+  }
+
+  response.writeHead(200, {
+    "Content-Type": contentTypes[path.extname(filePath).toLowerCase()] || "application/octet-stream",
+    "Cache-Control": "no-store",
+  });
+  if (request.method === "HEAD") {
+    response.end();
+    return;
+  }
+  fs.createReadStream(filePath).pipe(response);
+}
+
+function readJsonBody(request) {
+  return new Promise((resolve, reject) => {
+    let body = "";
+    request.setEncoding("utf8");
+    request.on("data", (chunk) => {
+      body += chunk;
+      if (body.length > 1024 * 1024) {
+        reject(new Error("Request body too large"));
+        request.destroy();
+      }
+    });
+    request.on("end", () => {
+      try {
+        resolve(JSON.parse(body || "{}"));
+      } catch (error) {
+        reject(new Error("Invalid JSON body"));
+      }
+    });
+    request.on("error", reject);
+  });
+}
+
+function sendJson(response, status, payload) {
+  response.writeHead(status, {
+    "Content-Type": "application/json; charset=utf-8",
+    "Cache-Control": "no-store",
+  });
+  response.end(JSON.stringify(payload));
+}
+
+function sendText(response, status, text) {
+  response.writeHead(status, {
+    "Content-Type": "text/plain; charset=utf-8",
+    "Cache-Control": "no-store",
+  });
+  response.end(text);
+}