feat(frontend): add precision-aware document date formatter
Adds formatDocumentDate — a pure, branch-per-precision label function that renders a document date at exactly the precision the data claims (DAY → full date, MONTH → "Juni 1916", SEASON → localized season word, YEAR → "1916", APPROX → "ca. 1916", RANGE with collapse/expand/open-ended, UNKNOWN → "Datum unbekannt"). Delegates to the existing date.ts helpers (shared T12:00:00 convention) and routes every localized word through Paraglide. A shared docs/date-label-fixtures.json table is asserted by this spec and will be asserted by the Java title formatter, as the drift guard requested in review (Markus/Sara). Adds de/en/es precision/season/edit-form i18n keys. Assumption: SEASON structured label is localized per locale (Decision 4), with the verbatim raw cell preserved as a separate secondary line by callers. Refs #666 Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
Marcel
101
docs/date-label-fixtures.json
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101
docs/date-label-fixtures.json
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{
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"_comment": "Single source of truth for the honest date-label rule set shared by the TS formatDocumentDate (frontend/src/lib/shared/utils/documentDate.ts) and the Java formatTitleDate (backend importing/DocumentTitleFormatter.java). Both test suites assert against THIS table so the two implementations cannot drift (en-dash vs hyphen, 'ca.' vs 'circa', season words, range collapse). Expected labels are the GERMAN (de) canonical form: import titles are always German, and the TS formatter defaults to the de locale. Do not edit one side's expectation without editing this file and both tests. See issue #666 and the Markus/Sara drift-guard decision.",
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"cases": [
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{
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"name": "DAY renders a full long date",
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"precision": "DAY",
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"anchor": "1943-12-24",
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"end": null,
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"raw": null,
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"expected": "24. Dezember 1943"
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},
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{
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"name": "MONTH renders month and year only — never a fabricated day",
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"precision": "MONTH",
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"anchor": "1916-06-01",
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"end": null,
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"raw": "Juni 1916",
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"expected": "Juni 1916"
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},
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{
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"name": "SEASON renders the season word from raw",
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"precision": "SEASON",
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"anchor": "1916-06-01",
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"end": null,
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"raw": "Sommer 1916",
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"expected": "Sommer 1916"
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},
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{
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"name": "SEASON with null raw derives the season from the anchor month",
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"precision": "SEASON",
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"anchor": "1916-04-01",
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"end": null,
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"raw": null,
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"expected": "Frühling 1916"
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},
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{
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"name": "YEAR renders the year only — suppresses month and day",
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"precision": "YEAR",
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"anchor": "1916-06-15",
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"end": null,
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"raw": null,
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"expected": "1916"
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},
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{
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"name": "APPROX renders a ca. prefix before the year",
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"precision": "APPROX",
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"anchor": "1920-01-01",
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"end": null,
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"raw": null,
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"expected": "ca. 1920"
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},
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{
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"name": "RANGE in the same month collapses the shared month and year",
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"precision": "RANGE",
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"anchor": "1917-01-10",
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"end": "1917-01-11",
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"raw": null,
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"expected": "10.–11. Jan. 1917"
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},
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{
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"name": "RANGE across months expands both months, sharing the year",
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"precision": "RANGE",
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"anchor": "1917-01-30",
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"end": "1917-02-02",
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"raw": null,
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"expected": "30. Jan. – 2. Feb. 1917"
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},
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{
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"name": "RANGE across a year boundary expands both full dates",
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"precision": "RANGE",
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"anchor": "1916-12-30",
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"end": "1917-01-02",
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"raw": null,
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"expected": "30. Dez. 1916 – 2. Jan. 1917"
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},
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{
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"name": "RANGE where end equals start collapses to a single day",
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"precision": "RANGE",
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"anchor": "1917-01-10",
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"end": "1917-01-10",
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"raw": null,
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"expected": "10. Jan. 1917"
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},
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{
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"name": "RANGE with a null end renders an open-range indicator, never a fabricated end",
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"precision": "RANGE",
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"anchor": "1917-01-10",
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"end": null,
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"raw": null,
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"expected": "ab 10. Jan. 1917"
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},
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{
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"name": "UNKNOWN renders the unknown label regardless of anchor",
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"precision": "UNKNOWN",
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"anchor": null,
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"end": null,
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"raw": "?",
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"expected": "Datum unbekannt"
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}
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]
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}
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@@ -261,6 +261,24 @@
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"doc_preview_iframe_title": "Dokumentvorschau",
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"doc_preview_iframe_title": "Dokumentvorschau",
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"doc_image_alt": "Original-Scan",
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"doc_image_alt": "Original-Scan",
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"doc_no_date": "Kein Datum",
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"doc_no_date": "Kein Datum",
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"date_precision_unknown": "Datum unbekannt",
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"date_precision_approx_prefix": "ca.",
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"date_range_open_prefix": "ab",
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"date_season_spring": "Frühling",
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"date_season_summer": "Sommer",
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"date_season_autumn": "Herbst",
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"date_season_winter": "Winter",
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"date_original_label": "Originaltext:",
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"date_unknown_icon_label": "Datum unbekannt",
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"form_label_date_precision": "Datumsgenauigkeit",
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"form_label_date_end": "Enddatum",
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"date_precision_option_day": "Genauer Tag",
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"date_precision_option_month": "Monat",
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"date_precision_option_season": "Jahreszeit",
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"date_precision_option_year": "Jahr",
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"date_precision_option_range": "Zeitraum",
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"date_precision_option_approx": "Ungefähr",
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"date_precision_option_unknown": "Unbekannt",
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"person_merge_will_be_deleted": "wird gelöscht.",
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"person_merge_will_be_deleted": "wird gelöscht.",
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"comp_typeahead_placeholder": "Namen tippen...",
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"comp_typeahead_placeholder": "Namen tippen...",
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"comp_typeahead_loading": "Suche...",
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"comp_typeahead_loading": "Suche...",
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@@ -261,6 +261,24 @@
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"doc_preview_iframe_title": "Document Preview",
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"doc_preview_iframe_title": "Document Preview",
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"doc_image_alt": "Original scan",
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"doc_image_alt": "Original scan",
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"doc_no_date": "No date",
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"doc_no_date": "No date",
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"date_precision_unknown": "Date unknown",
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"date_precision_approx_prefix": "c.",
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"date_range_open_prefix": "from",
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"date_season_spring": "Spring",
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"date_season_summer": "Summer",
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"date_season_autumn": "Autumn",
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"date_season_winter": "Winter",
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"date_original_label": "Original:",
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"date_unknown_icon_label": "Date unknown",
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"form_label_date_precision": "Date precision",
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"form_label_date_end": "End date",
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"date_precision_option_day": "Exact day",
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"date_precision_option_month": "Month",
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"date_precision_option_season": "Season",
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"date_precision_option_year": "Year",
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"date_precision_option_range": "Range",
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"date_precision_option_approx": "Approximate",
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"date_precision_option_unknown": "Unknown",
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"person_merge_will_be_deleted": "will be deleted.",
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"person_merge_will_be_deleted": "will be deleted.",
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"comp_typeahead_placeholder": "Type a name...",
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"comp_typeahead_placeholder": "Type a name...",
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"comp_typeahead_loading": "Searching...",
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"comp_typeahead_loading": "Searching...",
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@@ -261,6 +261,24 @@
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"doc_preview_iframe_title": "Vista previa del documento",
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"doc_preview_iframe_title": "Vista previa del documento",
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"doc_image_alt": "Escaneado original",
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"doc_image_alt": "Escaneado original",
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"doc_no_date": "Sin fecha",
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"doc_no_date": "Sin fecha",
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"date_precision_unknown": "Fecha desconocida",
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"date_precision_approx_prefix": "ca.",
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"date_range_open_prefix": "desde",
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"date_season_spring": "Primavera",
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"date_season_summer": "Verano",
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"date_season_autumn": "Otoño",
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"date_season_winter": "Invierno",
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"date_original_label": "Texto original:",
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"date_unknown_icon_label": "Fecha desconocida",
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"form_label_date_precision": "Precisión de la fecha",
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"form_label_date_end": "Fecha final",
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"date_precision_option_day": "Día exacto",
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"date_precision_option_month": "Mes",
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"date_precision_option_season": "Estación",
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"date_precision_option_year": "Año",
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"date_precision_option_range": "Periodo",
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"date_precision_option_approx": "Aproximada",
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"date_precision_option_unknown": "Desconocida",
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"person_merge_will_be_deleted": "será eliminado.",
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"person_merge_will_be_deleted": "será eliminado.",
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"comp_typeahead_placeholder": "Escriba un nombre...",
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"comp_typeahead_placeholder": "Escriba un nombre...",
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"comp_typeahead_loading": "Buscando...",
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"comp_typeahead_loading": "Buscando...",
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105
frontend/src/lib/shared/utils/documentDate.spec.ts
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105
frontend/src/lib/shared/utils/documentDate.spec.ts
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import { describe, expect, it } from 'vitest';
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import { readFileSync } from 'node:fs';
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import { resolve } from 'node:path';
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import { formatDocumentDate } from './documentDate';
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import { m } from '$lib/paraglide/messages.js';
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// ─── Shared drift-guard fixture ─────────────────────────────────────────────
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// The same table is asserted by the Java DocumentTitleFormatter test so the two
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// label implementations cannot drift. Expected values are the German canonical
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// form (see docs/date-label-fixtures.json).
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type FixtureCase = {
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name: string;
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precision: string;
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anchor: string | null;
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end: string | null;
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raw: string | null;
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expected: string;
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};
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const fixtures = JSON.parse(
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readFileSync(resolve(process.cwd(), '../docs/date-label-fixtures.json'), 'utf-8')
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) as { cases: FixtureCase[] };
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describe('formatDocumentDate – shared fixture table (de)', () => {
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for (const c of fixtures.cases) {
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it(c.name, () => {
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expect(
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formatDocumentDate(
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c.anchor,
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c.precision as Parameters<typeof formatDocumentDate>[1],
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c.end,
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c.raw,
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'de'
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)
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).toBe(c.expected);
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});
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}
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});
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// ─── Anti-fabrication: suppressed components never leak ──────────────────────
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describe('formatDocumentDate – suppressed precision components', () => {
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it('YEAR of a June date renders the year only, never the month', () => {
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const label = formatDocumentDate('1916-06-15', 'YEAR');
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expect(label).toBe('1916');
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expect(label).not.toContain('Juni');
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expect(label).not.toContain('15');
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});
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it('MONTH never renders the day-of-month', () => {
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const label = formatDocumentDate('1916-06-01', 'MONTH', null, 'Juni 1916');
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expect(label).toBe('Juni 1916');
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expect(label).not.toMatch(/\b1\.\s/);
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});
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});
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// ─── i18n: localized structured label ───────────────────────────────────────
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describe('formatDocumentDate – localization', () => {
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it('localizes the UNKNOWN label per locale', () => {
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expect(formatDocumentDate(null, 'UNKNOWN', null, '?', 'en')).toBe(
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m.date_precision_unknown(undefined, { locale: 'en' })
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);
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});
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it('localizes the APPROX prefix per locale', () => {
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expect(formatDocumentDate('1920-01-01', 'APPROX', null, null, 'en')).toBe(
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`${m.date_precision_approx_prefix(undefined, { locale: 'en' })} 1920`
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);
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});
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it('localizes the SEASON word per locale when raw is absent', () => {
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expect(formatDocumentDate('1916-07-01', 'SEASON', null, null, 'en')).toBe(
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`${m.date_season_summer(undefined, { locale: 'en' })} 1916`
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);
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});
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it('localizes the SEASON word even when the raw cell is verbatim German (Decision 4)', () => {
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expect(formatDocumentDate('1916-06-01', 'SEASON', null, 'Sommer 1916', 'en')).toBe(
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`${m.date_season_summer(undefined, { locale: 'en' })} 1916`
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);
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});
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});
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// ─── Security: untrusted raw must never influence the structured label ───────
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describe('formatDocumentDate – security', () => {
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it('ignores a malicious raw value for the structured label (raw is rendered separately, escaped)', () => {
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const label = formatDocumentDate(null, 'UNKNOWN', null, '<img src=x onerror=alert(1)>');
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expect(label).toBe('Datum unbekannt');
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expect(label).not.toContain('<img');
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});
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});
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// ─── Defensive null handling ─────────────────────────────────────────────────
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describe('formatDocumentDate – defensive null handling', () => {
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it('renders the unknown label when the anchor is null but precision is not UNKNOWN', () => {
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expect(formatDocumentDate(null, 'DAY')).toBe('Datum unbekannt');
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});
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it('falls back to start-day only for a RANGE whose end is null', () => {
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expect(formatDocumentDate('1917-01-10', 'RANGE', null)).toBe('ab 10. Jan. 1917');
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});
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});
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159
frontend/src/lib/shared/utils/documentDate.ts
Normal file
159
frontend/src/lib/shared/utils/documentDate.ts
Normal file
@@ -0,0 +1,159 @@
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import { formatDate, formatMCDate } from './date';
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import { m } from '$lib/paraglide/messages.js';
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/**
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* Precision of a document's date — mirrors the backend {@code DatePrecision} enum
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* and the import normalizer's seven values verbatim.
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*/
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export type DatePrecision = 'DAY' | 'MONTH' | 'SEASON' | 'YEAR' | 'RANGE' | 'APPROX' | 'UNKNOWN';
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|
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/**
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* Renders a document date at exactly the precision the data claims — never finer.
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*
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* Delegates to the {@link formatDate}/{@link formatMCDate} helpers (so the
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* `T12:00:00` UTC-safety convention and the German Intl formatting are shared,
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* not reimplemented) and routes every localized word through Paraglide.
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*
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* The label is the SINGLE SOURCE OF TRUTH shared with the Java
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* {@code DocumentTitleFormatter}: both are asserted against
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* `docs/date-label-fixtures.json` so they cannot drift. The untrusted `raw`
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* cell is only used to derive a season word (a known German season token) — it
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* is otherwise rendered separately by the caller via Svelte default escaping,
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* never interpolated into HTML here.
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*
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* @param iso the sort/filter anchor day (`YYYY-MM-DD`), nullable for UNKNOWN rows
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* @param precision descriptive precision metadata
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* @param end the RANGE end day; null means an open-ended range
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* @param raw the verbatim spreadsheet cell, used only for the SEASON word
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* @param locale BCP 47 tag for the localized structured parts (default `de-DE`)
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*/
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export function formatDocumentDate(
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iso: string | null | undefined,
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precision: DatePrecision,
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end?: string | null,
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raw?: string | null,
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locale: string = 'de-DE'
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): string {
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if (precision === 'UNKNOWN' || !iso) {
|
||||||
|
return m.date_precision_unknown(undefined, { locale: messageLocale(locale) });
|
||||||
|
}
|
||||||
|
|
||||||
|
const year = iso.slice(0, 4);
|
||||||
|
|
||||||
|
switch (precision) {
|
||||||
|
case 'DAY':
|
||||||
|
return formatDate(iso, 'long');
|
||||||
|
case 'MONTH':
|
||||||
|
return monthYear(iso, locale);
|
||||||
|
case 'SEASON':
|
||||||
|
return seasonLabel(iso, raw, locale, year);
|
||||||
|
case 'YEAR':
|
||||||
|
return year;
|
||||||
|
case 'APPROX':
|
||||||
|
return `${m.date_precision_approx_prefix(undefined, { locale: messageLocale(locale) })} ${year}`;
|
||||||
|
case 'RANGE':
|
||||||
|
return rangeLabel(iso, end, locale);
|
||||||
|
default:
|
||||||
|
return m.date_precision_unknown(undefined, { locale: messageLocale(locale) });
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// ─── precision branches ──────────────────────────────────────────────────────
|
||||||
|
|
||||||
|
function monthYear(iso: string, locale: string): string {
|
||||||
|
return new Intl.DateTimeFormat(locale, { month: 'long', year: 'numeric' }).format(noon(iso));
|
||||||
|
}
|
||||||
|
|
||||||
|
function seasonLabel(
|
||||||
|
iso: string,
|
||||||
|
raw: string | null | undefined,
|
||||||
|
locale: string,
|
||||||
|
year: string
|
||||||
|
): string {
|
||||||
|
const month = Number(iso.slice(5, 7));
|
||||||
|
// Prefer the season named in the raw cell; fall back to deriving it from the
|
||||||
|
// anchor month. Either way the WORD is localized (Decision 4) — the verbatim
|
||||||
|
// German raw cell is preserved separately as the visible secondary line.
|
||||||
|
const season = seasonFromRaw(raw) ?? seasonOfMonth(month);
|
||||||
|
return `${seasonWord(season, locale)} ${year}`;
|
||||||
|
}
|
||||||
|
|
||||||
|
function rangeLabel(iso: string, end: string | null | undefined, locale: string): string {
|
||||||
|
if (!end) {
|
||||||
|
return `${m.date_range_open_prefix(undefined, { locale: messageLocale(locale) })} ${formatMCDate(iso, locale)}`;
|
||||||
|
}
|
||||||
|
if (end === iso) {
|
||||||
|
return formatMCDate(iso, locale);
|
||||||
|
}
|
||||||
|
const start = noon(iso);
|
||||||
|
const finish = noon(end);
|
||||||
|
if (start.getFullYear() === finish.getFullYear()) {
|
||||||
|
return sameYearRange(end, start, finish, locale);
|
||||||
|
}
|
||||||
|
return `${formatMCDate(iso, locale)} – ${formatMCDate(end, locale)}`;
|
||||||
|
}
|
||||||
|
|
||||||
|
function sameYearRange(end: string, start: Date, finish: Date, locale: string): string {
|
||||||
|
if (start.getMonth() === finish.getMonth()) {
|
||||||
|
// Collapse the shared month/year: only the end carries "DD. Mon. YYYY".
|
||||||
|
return `${start.getDate()}.–${formatMCDate(end, locale)}`;
|
||||||
|
}
|
||||||
|
const startNoYear = new Intl.DateTimeFormat(locale, { day: 'numeric', month: 'short' }).format(
|
||||||
|
start
|
||||||
|
);
|
||||||
|
return `${startNoYear} – ${formatMCDate(end, locale)}`;
|
||||||
|
}
|
||||||
|
|
||||||
|
// ─── season helpers ──────────────────────────────────────────────────────────
|
||||||
|
|
||||||
|
type Season = 'spring' | 'summer' | 'autumn' | 'winter';
|
||||||
|
|
||||||
|
/** Quarter buckets; matches the normalizer's representative months (4/7/10/1). */
|
||||||
|
function seasonOfMonth(month: number): Season {
|
||||||
|
if (month >= 3 && month <= 5) return 'spring';
|
||||||
|
if (month >= 6 && month <= 8) return 'summer';
|
||||||
|
if (month >= 9 && month <= 11) return 'autumn';
|
||||||
|
return 'winter';
|
||||||
|
}
|
||||||
|
|
||||||
|
function seasonWord(season: Season, locale: string): string {
|
||||||
|
const opts = { locale: messageLocale(locale) };
|
||||||
|
switch (season) {
|
||||||
|
case 'spring':
|
||||||
|
return m.date_season_spring(undefined, opts);
|
||||||
|
case 'summer':
|
||||||
|
return m.date_season_summer(undefined, opts);
|
||||||
|
case 'autumn':
|
||||||
|
return m.date_season_autumn(undefined, opts);
|
||||||
|
case 'winter':
|
||||||
|
return m.date_season_winter(undefined, opts);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/** Maps a German season token at the start of the raw cell to a Season, else null. */
|
||||||
|
function seasonFromRaw(raw: string | null | undefined): Season | null {
|
||||||
|
if (!raw) return null;
|
||||||
|
const token = raw.trim().split(/\s+/)[0].toLowerCase();
|
||||||
|
const byToken: Record<string, Season> = {
|
||||||
|
frühling: 'spring',
|
||||||
|
frühjahr: 'spring',
|
||||||
|
sommer: 'summer',
|
||||||
|
herbst: 'autumn',
|
||||||
|
winter: 'winter'
|
||||||
|
};
|
||||||
|
return byToken[token] ?? null;
|
||||||
|
}
|
||||||
|
|
||||||
|
// ─── shared utilities ────────────────────────────────────────────────────────
|
||||||
|
|
||||||
|
function noon(iso: string): Date {
|
||||||
|
return new Date(iso + 'T12:00:00');
|
||||||
|
}
|
||||||
|
|
||||||
|
/** Paraglide expects a registered locale tag; map `de-DE` → `de` etc. */
|
||||||
|
function messageLocale(locale: string): 'de' | 'en' | 'es' {
|
||||||
|
const base = locale.slice(0, 2);
|
||||||
|
if (base === 'en') return 'en';
|
||||||
|
if (base === 'es') return 'es';
|
||||||
|
return 'de';
|
||||||
|
}
|
||||||
Reference in New Issue
Block a user