76 lines
2.0 KiB
Markdown
76 lines
2.0 KiB
Markdown
🔍 Problem Summary
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You implemented **Local Storage Autosave** (item #2), but **on page reload, the session does not restore the saved state**. The page loads with the default state instead.
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---
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## 🔎 Likely Root Cause
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### ❌ You're saving the state to Local Storage, but **not loading it on startup**.
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In `useDrumMachine.ts`, the state is probably initialized like this (or similar):
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```ts
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const [state, setState] = useState(defaultState);
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```
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This means the state **always starts from `defaultState`**, and no logic attempts to retrieve from `localStorage`.
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---
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## ✅ Solution
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### 🛠 Modify the Initial State to Load from Local Storage
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Update your `useDrumMachine` hook to **attempt to load the autosaved session from localStorage first**, before falling back to the default state.
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#### ✅ Example Patch:
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```ts
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const loadInitialState = (): StateType => {
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try {
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const saved = localStorage.getItem('Autosaved Session');
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if (saved) {
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const parsed = JSON.parse(saved);
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return parsed.data;
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}
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} catch (e) {
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console.error('Failed to load autosaved session:', e);
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}
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return defaultState;
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};
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const [state, setState] = useState(loadInitialState);
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```
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---
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## 📌 Notes
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- Make sure this runs **only for new sessions**, not when joining an existing session.
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- If your app distinguishes between "new session" and "joined session" using `useSession`, you can use that to conditionally load from local storage.
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#### Example:
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```ts
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const sessionId = useSession();
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const isNewSession = sessionId.startsWith('new-'); // or whatever logic you use
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const [state, setState] = useState(() => {
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if (isNewSession) return loadInitialState();
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return defaultState;
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});
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```
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---
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## ✅ Recap
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|Problem|Fix|
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|---|---|
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|State always loads from `defaultState`|Load from `localStorage` on first mount|
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|Only autosave was implemented|Add **autosave + restore** for full loop|
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|Make it conditional on session type|Don't overwrite a joined session with autosaved local one|
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