chore: Move to Typescript (#2783)

This PR moves the entire project to Typescript. Due to the ~1000 ignores this will lead to a messy codebase for a while, but the churn is worth it – all of those ignore comments are places that were never type-safe previously.

closes #1282

server/routes/api/middlewares/editor.ts

@@ -0,0 +1,31 @@
+import { Context } from "koa";
+import pkg from "rich-markdown-editor/package.json";
+// @ts-expect-error ts-migrate(7016) FIXME: Could not find a declaration file for module 'semv... Remove this comment to see the full error message
+import semver from "semver";
+import { EditorUpdateError } from "@server/errors";
+
+export default function editor() {
+  return async function editorMiddleware(
+    ctx: Context,
+    next: () => Promise<any>
+  ) {
+    const clientVersion = ctx.headers["x-editor-version"];
+
+    // If the editor version on the client is behind the current version being
+    // served in production by either a minor (new features), or major (breaking
+    // changes) then force a client reload.
+    if (clientVersion) {
+      const parsedClientVersion = semver.parse(clientVersion);
+      const parsedCurrentVersion = semver.parse(pkg.version);
+
+      if (
+        parsedClientVersion.major < parsedCurrentVersion.major ||
+        parsedClientVersion.minor < parsedCurrentVersion.minor
+      ) {
+        throw EditorUpdateError();
+      }
+    }
+
+    return next();
+  };
+}