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

app/scenes/Document/components/MarkAsViewed.ts

@@ -0,0 +1,33 @@
+import * as React from "react";
+import Document from "~/models/Document";
+
+const MARK_AS_VIEWED_AFTER = 3 * 1000;
+type Props = {
+  document: Document;
+  children?: React.ReactNode;
+};
+
+class MarkAsViewed extends React.Component<Props> {
+  viewTimeout: ReturnType<typeof setTimeout>;
+
+  componentDidMount() {
+    const { document } = this.props;
+    this.viewTimeout = setTimeout(async () => {
+      const view = await document.view();
+
+      if (view) {
+        document.updateLastViewed(view);
+      }
+    }, MARK_AS_VIEWED_AFTER);
+  }
+
+  componentWillUnmount() {
+    clearTimeout(this.viewTimeout);
+  }
+
+  render() {
+    return this.props.children || null;
+  }
+}
+
+export default MarkAsViewed;