ag-beats/.context/Autosave Adjustment.md

🔍 Problem Summary

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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🔎 Likely Root Cause

❌ You're saving the state to Local Storage, but not loading it on startup.

In useDrumMachine.ts, the state is probably initialized like this (or similar):

const [state, setState] = useState(defaultState);

This means the state always starts from defaultState, and no logic attempts to retrieve from localStorage.

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✅ Solution

🛠 Modify the Initial State to Load from Local Storage

Update your useDrumMachine hook to attempt to load the autosaved session from localStorage first, before falling back to the default state.

✅ Example Patch:

const loadInitialState = (): StateType => {
  try {
    const saved = localStorage.getItem('Autosaved Session');
    if (saved) {
      const parsed = JSON.parse(saved);
      return parsed.data;
    }
  } catch (e) {
    console.error('Failed to load autosaved session:', e);
  }
  return defaultState;
};

const [state, setState] = useState(loadInitialState);

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📌 Notes

• Make sure this runs only for new sessions, not when joining an existing session.

• If your app distinguishes between "new session" and "joined session" using useSession, you can use that to conditionally load from local storage.

Example:

const sessionId = useSession();
const isNewSession = sessionId.startsWith('new-'); // or whatever logic you use

const [state, setState] = useState(() => {
  if (isNewSession) return loadInitialState();
  return defaultState;
});

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✅ Recap

Problem	Fix
State always loads from defaultState	Load from localStorage on first mount
Only autosave was implemented	Add autosave + restore for full loop
Make it conditional on session type	Don't overwrite a joined session with autosaved local one