feat(calendar): add date navigation (prev/next day) to calendar sidebar

[VedantGupta-DTU]

Proposed changes

Currently, the Calendar sidebar (specifically OutlookEventsList) is hardcoded to only fetch and display events for the current day using useOutlookCalendarListForToday. This restricts users from checking events for tomorrow, next week, or past days natively within the Rocket.Chat client.

This PR introduces stateful date navigation to the calendar sidebar:

• Date State: Introduced a currentDate React state and swapped the fetch hook to the dynamic useOutlookCalendarList(currentDate).
• Navigation Controls: Rendered a sticky horizontal navigation bar containing <IconButton> chevrons to increment/decrement the date, alongside a localized Intl.DateTimeFormat display of the active date.
• Cache Invalidation: React Query elegantly handles the background fetches as the date state changes, maintaining the correct query keys cleanly.

Issue(s)

Addresses the missing functionality of jumping to different dates inside the Calendar Contextual Bar.

Steps to test or reproduce

1. Go to the Rocket.Chat UI and open the Calendar (Outlook) sidebar.
2. Observe the current date rendered underneath the header.
3. Click the > (Next Day) chevron arrow.
4. Verify that the date text updates correctly and the agenda list re-fetches to load the events scheduled for tomorrow.
5. Click < (Previous Day) to navigate backwards.

Further comments

The usage of Intl.DateTimeFormat ensures that the date format is completely native, accessible, and requires no heavy external libraries like Moment.js to format properly.

Summary by CodeRabbit

• New Features
  • Added date navigation to the Outlook Calendar events list, enabling users to view events for different dates using left and right navigation buttons.
  • Displays the currently selected date with a formatted label.

[dionisio-bot]

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[coderabbitai]

Walkthrough

The component now supports viewing Outlook calendar events for any date, not just today. A parameterized hook replaces the fixed-date variant, with local state tracking the selected date. Navigation buttons allow incrementing/decrementing the date to populate the events list.

Changes

Cohort / File(s)	Summary
Outlook Calendar Date Navigation apps/meteor/client/views/outlookCalendar/OutlookEventsList/OutlookEventsList.tsx	Replaced useOutlookCalendarListForToday hook with parameterized useOutlookCalendarList(currentDate). Added state management for date selection, memoized day navigation handlers, and UI controls (chevron buttons and date label) to enable browsing events across different dates.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Suggested labels

type: feature

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: adding date navigation (prev/next day) functionality to the Outlook calendar sidebar, which is the core purpose of the pull request.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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[cubic-dev-ai]

1 issue found across 1 file

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="apps/meteor/client/views/outlookCalendar/OutlookEventsList/OutlookEventsList.tsx">

<violation number="1" location="apps/meteor/client/views/outlookCalendar/OutlookEventsList/OutlookEventsList.tsx:70">
P2: Date header formatting is hardcoded to `en-US`, preventing locale-aware display for non-US users.</violation>
</file>

_{Reply with feedback, questions, or to request a fix. Tag @cubic-dev-ai to re-run a review.}

[coderabbitai]

Actionable comments posted: 2

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In
`@apps/meteor/client/views/outlookCalendar/OutlookEventsList/OutlookEventsList.tsx`:
- Around line 69-71: The date formatting is hardcoded to 'en-US' which breaks
i18n; update the Intl.DateTimeFormat usage in OutlookEventsList (the code that
formats currentDate with Intl.DateTimeFormat) to use a dynamic locale (pass
undefined to use the browser locale) or obtain the app locale from Rocket.Chat's
locale context/translation hook and pass that instead so the rendered date
respects user locale settings. Ensure you update the call that currently is new
Intl.DateTimeFormat('en-US', { month: 'short', day: 'numeric', year: 'numeric'
}).format(currentDate) to use the chosen dynamic locale value.
- Line 48: The query key used by useOutlookCalendarList is missing the passed
date, causing React Query to return cached results for different dates; update
the queryKey inside useOutlookCalendarList (the hook used by OutlookEventsList)
to include the date (e.g. date.toISOString()) so each date produces a distinct
cache entry and the API call uses the correct key.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

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Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 95bc8f7f-bf44-41e1-8417-b15d18602b06

📥 Commits

Reviewing files that changed from the base of the PR and between 4235cd9 and cf0ce0f.

📒 Files selected for processing (1)

• apps/meteor/client/views/outlookCalendar/OutlookEventsList/OutlookEventsList.tsx

📜 Review details

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• GitHub Check: cubic · AI code reviewer

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**/*.{ts,tsx,js}

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Files:

• apps/meteor/client/views/outlookCalendar/OutlookEventsList/OutlookEventsList.tsx

🧠 Learnings (1)

📚 Learning: 2026-03-27T14:52:56.865Z

Learnt from: dougfabris
Repo: RocketChat/Rocket.Chat PR: 39892
File: apps/meteor/client/views/room/contextualBar/Threads/Thread.tsx:150-155
Timestamp: 2026-03-27T14:52:56.865Z
Learning: In Rocket.Chat, there are two different `ModalBackdrop` components with different prop APIs. During review, confirm the import source: (1) `rocket.chat/fuselage` `ModalBackdrop` uses `ModalBackdropProps` based on `BoxProps` (so it supports `onClick` and other Box/DOM props) and does not have an `onDismiss` prop; (2) `rocket.chat/ui-client` `ModalBackdrop` uses a narrower props interface like `{ children?: ReactNode; onDismiss?: () => void }` and handles Escape keypress and outside mouse-up, and it does not forward arbitrary DOM props such as `onClick`. Flag mismatched props (e.g., `onDismiss` passed to the fuselage component or `onClick` passed to the ui-client component) and ensure the usage matches the correct component being imported.

Applied to files:

• apps/meteor/client/views/outlookCalendar/OutlookEventsList/OutlookEventsList.tsx

🔇 Additional comments (2)

apps/meteor/client/views/outlookCalendar/OutlookEventsList/OutlookEventsList.tsx (2)

38-48: LGTM – state and handlers are well implemented.

The lazy state initializer avoids unnecessary Date object creation, and the useCallback handlers correctly manipulate dates with proper month/year boundary handling via the Date constructor.

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74-103: Conditional rendering logic is correct.

The state handling for isPending, isError, and isSuccess properly covers all query states, and the empty-state check at line 83 correctly guards against showing "No history" while still loading.