Scheduler - Implement getOccurrences()

[Tucchhaa]

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[Copilot]

Pull request overview

This PR implements a new public API method getOccurrences() for the Scheduler component that allows users to retrieve appointment occurrences within a specified date range. The method expands recurring appointments into individual occurrences and handles various edge cases including all-day appointments, recurrence exceptions, and custom appointment fields.

Changes:

• Added new getOccurrences() method to expose appointment occurrence calculation functionality
• Extracted and enhanced test helper getSchedulerMock() for reuse across test files
• Implemented comprehensive test suite covering common, recurring, and all-day appointments with various edge cases

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
packages/devextreme/js/__internal/scheduler/m_scheduler.ts	Added public API method getOccurrences() that delegates to layout manager
packages/devextreme/js/__internal/scheduler/view_model/appointments_layout_manager.ts	Added getOccurrences() method to prepare appointments and call core implementation
packages/devextreme/js/__internal/scheduler/view_model/filtration/get_occurrences.ts	New file implementing core logic for filtering and expanding appointments into occurrences
packages/devextreme/js/__internal/scheduler/view_model/appointments_layout_manager.test.ts	New comprehensive test file with 400+ lines covering all scenarios and edge cases
packages/devextreme/js/__internal/scheduler/view_model/filtration/utils/get_filter_options/get_filter_options.test.ts	Refactored to import shared getSchedulerMock() test helper, added explicit dateRange to test case

[Copilot]

Pull request overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated no new comments.

[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 9 comments.

[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.