#126: IHKForm.java

Wicket form for the IHK plugin UI — provides the week selector, configuration editor, and export trigger. Extends AbstractStandardForm<Object, IHKPage> — ProjectForge's Wicket form base class with Bootstrap grid layout. 248 lines of Java.

Form controls

• Week selector (QuickSelectWeekPanel) — calendar widget for choosing the report week. Includes prev/next week navigation and "this week" quick-select button
• Start/end date display (LocalDatePanel + LocalDateModel) — shows the Monday and Friday of selected week as read-only fields
• Configuration section — editable fields for:
  • ausbildungsbeginn — apprenticeship start date (with date picker)
  • ausbildungsjahr — training year override (numeric input, default -1)
  • teamname — team/department name (text input)
  Bound to IHKCommentObject via Wicket's PropertyModel
• Export button (SingleButtonPanel with SubmitLink) — triggers IHKExporter.export() and streams the Excel file as HTTP download
• Configuration save button — serializes IHKCommentObject back to JSON and writes it to the address book comment field (AddressDO.comment) via AddressDao

Data loading flow

1. On form initialization, reads ThreadLocalUserContext.getLoggedInUser()
2. Queries AddressDao to find the matching address book entry (match by first/last name)
3. If found and comment field contains JSON, deserializes IHKCommentObject via JsonUtils.fromJson()
4. Auto-detects if the trainee has no configuration yet — shows setup prompt

Wicket layout

Uses ProjectForge's flowlayout package for Bootstrap grid-based form layout:

• FieldsetPanel — groups related fields with a heading
• DivPanel / DivTextPanel — Bootstrap grid containers
• GridSize.COL50 / COL100 — responsive column widths
• WicketUtils.getImageIcon() — icons for buttons (download, save)
• CSSColor — styling constants for info/warning messages

Validation

• ausbildungsbeginn must be a valid date — throws UserException with localized message if missing or invalid
• Requires the trainee's first/last name to match their AddressDO record — if no match found, displays a warning

Request cycle

Wicket form submit → onSubmit() → calls IHKExporter.export() → returns byte[] → wraps in IResourceStream → triggers browser download of Berichtsheft_KW{week}_{Name}.xlsx.