#171 Issue: Update App.tsx

[coder77ai]

Closes #171

📝 Description

The issue was the "Signed in!" toast message appears repeatedly whenever the browser tab is minimized and re-focused.
This was caused by the Supabase SIGNED_IN auth event firing again during session refresh, which happens automatically when the tab regains focus.

🔧 Changes Made

The PR adds a guard so the toast only triggers when the authentication state actually changes.

case "SIGNED_IN":

if (!isAuthenticated) {
setIsAuthenticated(true);
toast.success("Signed in!");
}
break;

case "SIGNED_OUT":
if (isAuthenticated) {
setIsAuthenticated(false);
setRepoData(null);
toast.success("Signed out!");
}
break;

Summary by CodeRabbit

• Bug Fixes
  • Improved authentication event handling to prevent redundant state updates and duplicate notifications. The sign-in and sign-out flows now include guards to ensure state transitions occur only when necessary.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

Walkthrough

The pull request adds conditional guards to authentication event handlers in frontend/src/App.tsx to prevent redundant state updates and duplicate toast notifications. The SIGNED_IN handler now only shows the "Signed in!" toast if not already authenticated, and the SIGNED_OUT handler only clears state if currently authenticated.

Changes

Cohort / File(s)	Summary
Authentication event handler guards frontend/src/App.tsx	Added conditional checks to SIGNED_IN and SIGNED_OUT event handlers to prevent duplicate toast notifications and unnecessary state updates when authentication state has not changed.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Possibly related PRs

• [bugfix]: Fix frontend build errors #79: Introduced the initial isAuthenticated state and authentication handlers that this PR now enhances with conditional guards to prevent redundant notifications.

Suggested reviewers

• chandansgowda

Poem

🐰 A hop, a skip, through tabs we go,
Yet toasts don't show where once they'd flow,
With guards so wise and checks so keen,
Each sign-in shows just once—pristine! ✨

Pre-merge checks and finishing touches

❌ Failed checks (1 warning, 1 inconclusive)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	You can run @coderabbitai generate docstrings to improve docstring coverage.
Title check	❓ Inconclusive	The title '#171 Issue: Update App.tsx' is vague and generic, using only a reference number and filename without describing the actual fix or change made.	Use a more descriptive title that explains the fix, such as 'Fix: Prevent auth toast from reappearing on tab switch' or 'Add guards to prevent duplicate auth notifications'.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Linked Issues check	✅ Passed	The code changes correctly implement the guard logic specified in issue #171 by adding isAuthenticated checks before displaying toast notifications on auth state changes.
Out of Scope Changes check	✅ Passed	All changes are scoped to fixing the auth toast repetition issue; no unrelated modifications to other features or functionality are present.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 8eeacad and f6e92a0.

📒 Files selected for processing (1)

• frontend/src/App.tsx (1 hunks)

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