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/utils/passport.ts

@@ -0,0 +1,62 @@
+import { addMinutes, subMinutes } from "date-fns";
+import fetch from "fetch-with-proxy";
+import { Request } from "koa";
+import { OAuthStateMismatchError } from "../errors";
+import { getCookieDomain } from "./domains";
+
+export class StateStore {
+  key = "state";
+
+  store = (req: Request, callback: () => void) => {
+    // Produce an 8-character random string as state
+    const state = Math.random().toString(36).slice(-8);
+
+    // @ts-expect-error ts-migrate(2339) FIXME: Property 'cookies' does not exist on type 'Request... Remove this comment to see the full error message
+    req.cookies.set(this.key, state, {
+      httpOnly: false,
+      expires: addMinutes(new Date(), 10),
+      domain: getCookieDomain(req.hostname),
+    });
+    // @ts-expect-error ts-migrate(2554) FIXME: Expected 0 arguments, but got 2.
+    callback(null, state);
+  };
+
+  verify = (req: Request, providedState: string, callback: () => void) => {
+    // @ts-expect-error ts-migrate(2339) FIXME: Property 'cookies' does not exist on type 'Request... Remove this comment to see the full error message
+    const state = req.cookies.get(this.key);
+
+    if (!state) {
+      return callback(
+        // @ts-expect-error ts-migrate(2554) FIXME: Expected 0 arguments, but got 1.
+        new OAuthStateMismatchError("State not return in OAuth flow")
+      );
+    }
+
+    // @ts-expect-error ts-migrate(2339) FIXME: Property 'cookies' does not exist on type 'Request... Remove this comment to see the full error message
+    req.cookies.set(this.key, "", {
+      httpOnly: false,
+      expires: subMinutes(new Date(), 1),
+      domain: getCookieDomain(req.hostname),
+    });
+
+    if (state !== providedState) {
+      // @ts-expect-error ts-migrate(2554) FIXME: Expected 0 arguments, but got 1.
+      return callback(new OAuthStateMismatchError());
+    }
+
+    // @ts-expect-error ts-migrate(2554) FIXME: Expected 0 arguments, but got 2.
+    callback(null, true);
+  };
+}
+
+export async function request(endpoint: string, accessToken: string) {
+  const response = await fetch(endpoint, {
+    method: "GET",
+    credentials: "same-origin",
+    headers: {
+      Authorization: `Bearer ${accessToken}`,
+      "Content-Type": "application/json",
+    },
+  });
+  return response.json();
+}