Remove all useEffect usages (#12659)

Author: MichaReiser

playground/.gitignore

@@ -128,3 +128,6 @@ dist
 .yarn/build-state.yml
 .yarn/install-state.gz
 .pnp.*
+
+# Wrangler
+api/.wrangler

playground/README.md

@@ -12,7 +12,7 @@ Finally, install TypeScript dependencies with `npm install`, and run the develop
 
 To run the datastore, which is based on [Workers KV](https://developers.cloudflare.com/workers/runtime-apis/kv/),
 install the [Wrangler CLI](https://developers.cloudflare.com/workers/wrangler/install-and-update/),
-then run `npx wrangler dev --local` from the `./playground/db` directory. Note that the datastore is
+then run `npx wrangler dev --local` from the `./playground/api` directory. Note that the datastore is
 only required to generate shareable URLs for code snippets. The development datastore does not
 require Cloudflare authentication or login, but in turn only persists data locally.
 

playground/src/Editor/Chrome.tsx

@@ -0,0 +1,123 @@
+import { useCallback, useMemo, useRef, useState } from "react";
+import Header from "./Header";
+import { persist, persistLocal, restore, stringify } from "./settings";
+import { useTheme } from "./theme";
+import { default as Editor, Source } from "./Editor";
+import initRuff, { Workspace } from "../pkg/ruff_wasm";
+import { loader } from "@monaco-editor/react";
+import { setupMonaco } from "./setupMonaco";
+import { DEFAULT_PYTHON_SOURCE } from "../constants";
+
+export default function Chrome() {
+  const initPromise = useRef<null | Promise<void>>(null);
+  const [pythonSource, setPythonSource] = useState<null | string>(null);
+  const [settings, setSettings] = useState<null | string>(null);
+  const [revision, setRevision] = useState(0);
+  const [ruffVersion, setRuffVersion] = useState<string | null>(null);
+
+  const [theme, setTheme] = useTheme();
+
+  const handleShare = useCallback(() => {
+    if (settings == null || pythonSource == null) {
+      return;
+    }
+
+    persist(settings, pythonSource).catch((error) =>
+      console.error(`Failed to share playground: ${error}`),
+    );
+  }, [pythonSource, settings]);
+
+  if (initPromise.current == null) {
+    initPromise.current = startPlayground()
+      .then(({ sourceCode, settings, ruffVersion }) => {
+        setPythonSource(sourceCode);
+        setSettings(settings);
+        setRuffVersion(ruffVersion);
+        setRevision(1);
+      })
+      .catch((error) => {
+        console.error("Failed to initialize playground.", error);
+      });
+  }
+
+  const handleSourceChanged = useCallback(
+    (source: string) => {
+      setPythonSource(source);
+      setRevision((revision) => revision + 1);
+
+      if (settings != null) {
+        persistLocal({ pythonSource: source, settingsSource: settings });
+      }
+    },
+    [settings],
+  );
+
+  const handleSettingsChanged = useCallback(
+    (settings: string) => {
+      setSettings(settings);
+      setRevision((revision) => revision + 1);
+
+      if (pythonSource != null) {
+        persistLocal({ pythonSource: pythonSource, settingsSource: settings });
+      }
+    },
+    [pythonSource],
+  );
+
+  const source: Source | null = useMemo(() => {
+    if (pythonSource == null || settings == null) {
+      return null;
+    }
+
+    return { pythonSource, settingsSource: settings };
+  }, [settings, pythonSource]);
+
+  return (
+    <main className="flex flex-col h-full bg-ayu-background dark:bg-ayu-background-dark">
+      <Header
+        edit={revision}
+        theme={theme}
+        version={ruffVersion}
+        onChangeTheme={setTheme}
+        onShare={handleShare}
+      />
+
+      <div className="flex flex-grow">
+        {source != null && (
+          <Editor
+            theme={theme}
+            source={source}
+            onSettingsChanged={handleSettingsChanged}
+            onSourceChanged={handleSourceChanged}
+          />
+        )}
+      </div>
+    </main>
+  );
+}
+
+// Run once during startup. Initializes monaco, loads the wasm file, and restores the previous editor state.
+async function startPlayground(): Promise<{
+  sourceCode: string;
+  settings: string;
+  ruffVersion: string;
+}> {
+  await initRuff();
+  const monaco = await loader.init();
+
+  console.log(monaco);
+
+  setupMonaco(monaco);
+
+  const response = await restore();
+  const [settingsSource, pythonSource] = response ?? [
+    stringify(Workspace.defaultSettings()),
+    DEFAULT_PYTHON_SOURCE,
+  ];
+
+  return {
+    sourceCode: pythonSource,
+    settings: settingsSource,
+    ruffVersion: Workspace.version(),
+  };
+}