feat(frontend): buildMatrix pivots statuses into date×subject grid

2026-07-06 15:37:33 -04:00
parent 3f8febfda3
commit b5578f6e24
2 changed files with 114 additions and 0 deletions
@@ -53,3 +53,62 @@ export function listExportableParams(dailyTemplate, statuses) {

  return params;
 }
+
+// A cell has a value unless it is null, undefined, or the empty string.
+// (0 and false are real values.)
+function hasValue(v) {
+  return v !== null && v !== undefined && v !== '';
+}
+
+function dateKey(date) {
+  return String(date).slice(0, 10); // ISO datetime or date → YYYY-MM-DD
+}
+
+// Pivot statuses into { columns, rows }.
+//   columns: [{ id, header }] — all animals, ordered by name, headers
+//            disambiguated with animal_id_string on duplicate names.
+//   rows:    [{ date, values }] — one per date that has ≥1 value; values are
+//            aligned to columns, blank cells are '' (empty string).
+export function buildMatrix(statuses, animals, param) {
+  const sortedAnimals = [...(animals ?? [])].sort((a, b) =>
+    String(a.animal_name ?? '').localeCompare(String(b.animal_name ?? '')),
+  );
+
+  const nameCounts = new Map();
+  for (const a of sortedAnimals) {
+    const n = a.animal_name ?? '';
+    nameCounts.set(n, (nameCounts.get(n) ?? 0) + 1);
+  }
+  const columns = sortedAnimals.map((a) => {
+    const name = a.animal_name ?? '';
+    const header = nameCounts.get(name) > 1 ? `${name} (${a.animal_id_string ?? ''})` : name;
+    return { id: a.id, header };
+  });
+  const colIndex = new Map(columns.map((c, i) => [c.id, i]));
+
+  // cells: dateKey -> Map(animalId -> value); first status per (date, animal) wins.
+  const cells = new Map();
+  const datesWithData = new Set();
+  const ordered = [...(statuses ?? [])].sort((a, b) => dateKey(a.date).localeCompare(dateKey(b.date)));
+  for (const s of ordered) {
+    if (!colIndex.has(s.animal_id)) continue;
+    const dk = dateKey(s.date);
+    if (!cells.has(dk)) cells.set(dk, new Map());
+    const byAnimal = cells.get(dk);
+    if (byAnimal.has(s.animal_id)) continue; // first wins
+    const v = extractValue(s, param);
+    byAnimal.set(s.animal_id, v);
+    if (hasValue(v)) datesWithData.add(dk);
+  }
+
+  const rows = [...datesWithData].sort().map((dk) => {
+    const byAnimal = cells.get(dk);
+    const values = columns.map((c) => {
+      const v = byAnimal.has(c.id) ? byAnimal.get(c.id) : null;
+      return hasValue(v) ? v : '';
+    });
+    return { date: dk, values };
+  });
+
+  return { columns, rows };
+}