migrate JavaScript to TypeScript

src/routes/webview.ts

@@ -0,0 +1,54 @@
+import * as express from "express";
+import { getRepo, handleError } from "./route-utils";
+import * as path from "path";
+import AnonymizedFile from "../AnonymizedFile";
+import GitHubDownload from "../source/GitHubDownload";
+
+const router = express.Router();
+
+async function webView(req: express.Request, res: express.Response) {
+  const repo = await getRepo(req, res);
+  if (!repo) return;
+  try {
+    if (!repo.options.page) {
+      throw "page_not_activated";
+    }
+    if (!repo.options.pageSource) {
+      throw "page_not_activated";
+    }
+
+    if (
+      repo.options.pageSource?.branch !=
+      (repo.source as GitHubDownload).branch.name
+    ) {
+      throw "page_not_supported_on_different_branch";
+    }
+
+    let requestPath = path.join(
+      repo.options.pageSource?.path,
+      req.path.substring(
+        req.path.indexOf(req.params.repoId) + req.params.repoId.length
+      )
+    );
+    if (requestPath[requestPath.length - 1] == "/") {
+      requestPath = path.join(requestPath, "index.html");
+    }
+    requestPath = requestPath;
+    const f = new AnonymizedFile(repo, {
+      anonymizedPath: requestPath,
+    });
+    if (!(await f.isFileSupported())) {
+      return res.status(500).send({ error: "file_not_supported" });
+    }
+    f.send(res);
+  } catch (error) {
+    handleError(error, res);
+  }
+}
+
+router.get("/:repoId/*", webView);
+router.get("/:repoId", (req: express.Request, res: express.Response) => {
+  res.redirect("/w" + req.url + "/");
+});
+
+export default router;