[kris7011]

Purpose

Let a planner correct a generated schedule by hand without breaking the rules the scheduler follows, undo mistakes, and hand out the result as a PDF. Calendar view and PDF export were listed as planned features.

Implementation

• app/schedule_editor.py (no Tk): add, remove and replace employees on a shift. Validation reuses Employee.get_shift_blockers (skill, capacity, one shift per day, rest time) plus "already assigned" and "fully staffed". A refused change raises ScheduleEditError with all reasons and changes nothing. A replacement is checked as if the current employee had left.
• Undo: the command pattern. Each edit stores the list positions it touched; undo restores the exact earlier state, including order.
• app/calendar_view.py: "Kalender" tab with a dates × Dag/Aften/Nat grid and staffing colours. The edit panel lists every employee, with Danish reasons for those who cannot take the shift. A change history sits under the calendar; undo is available as a button and Ctrl+Z. The other tabs refresh after each change.
• app/pdf_export.py (ReportLab, BSD): period, print time, number of manual changes, all shifts (missing staff highlighted) and an employee workload table. It refuses to overwrite unless allowed (the GUI allows it only after the save dialog's confirmoverwrite), and writes atomically via a temp file and os.replace.
• Data safety: edits stay in memory, and the CSV inputs are never written. "Kør vagtplan" asks before discarding manual changes.
• New runtime dependency: reportlab>=5.1,<6 (requirements.txt).

Testing

• python -m pytest: 72 passed (24 new: 19 editor, 5 PDF). The tests don't import Tkinter.
• Desktop demo on Windows 11 / Python 3.12 / Tk 8.6: the real window was driven via the real buttons' invoke(); only the modal dialogs were stubbed.
  • A rule violation was refused with both reasons.
  • Replace + add staffed the open shift (unassigned 1 → 0).
  • The PDF was exported: "12 fuldt bemandede … Manuelle ændringer: 2".
  • Undo restored the previous state (unassigned back to 1).
  • The CSV hashes were unchanged.
  • Screenshots are in docs/images/.
• The demo found two layout bugs in the first version (the edit panel could be pushed out of the window; the history was clipped). Both are fixed here.

Not covered

• Tk widgets have no automated tests (they contain no rules).
• There is no redo, and no saving of an edited schedule.
• See docs/PROJECT_WALKTHROUGH.md.

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