fix teacher, parent and admin pages

src/pages/inventory/inventoryHelpers.ts

@@ -0,0 +1,87 @@
+/** Shared UI helpers for inventory pages (parity with CI views). */
+
+export function gradeLabel(cat: Record<string, unknown> | null | undefined): string {
+  if (!cat) return '—'
+  const gmin = cat.grade_min
+  const gmax = cat.grade_max
+  if (gmin == null && gmax == null) return '—'
+  const nmin = typeof gmin === 'number' ? gmin : gmin !== '' ? Number(gmin) : null
+  const nmax = typeof gmax === 'number' ? gmax : gmax !== '' ? Number(gmax) : null
+  if (nmin != null && Number.isFinite(nmin) && nmax != null && Number.isFinite(nmax))
+    return `G${Math.floor(nmin)}–G${Math.floor(nmax)}`
+  if (nmin != null && Number.isFinite(nmin)) return `G${Math.floor(nmin)}+`
+  if (nmax != null && Number.isFinite(nmax)) return `≤G${Math.floor(nmax)}`
+  return '—'
+}
+
+export function catLabelBook(c: Record<string, unknown>): string {
+  let name = String(c.name ?? '')
+  const gl = gradeLabel(c)
+  if (gl !== '—') name += ` (${gl})`
+  return name
+}
+
+export function conditionBadgeClass(condition: unknown): string {
+  const map: Record<string, string> = {
+    good: 'success',
+    needs_repair: 'warning',
+    need_replace: 'danger',
+    cannot_find: 'secondary',
+  }
+  const k = typeof condition === 'string' ? condition : ''
+  return map[k] ?? 'light'
+}
+
+export function formatConditionLabel(condition: unknown): string {
+  if (condition == null || condition === '') return ''
+  return String(condition)
+    .split('_')
+    .map((w) => w.charAt(0).toUpperCase() + w.slice(1))
+    .join(' ')
+}
+
+export function parseInventoryList(data: unknown): {
+  items: Record<string, unknown>[]
+  categories: Record<string, unknown>[]
+  userNames: Record<string, string>
+} {
+  if (!data || typeof data !== 'object')
+    return { items: [], categories: [], userNames: {} }
+  const o = data as Record<string, unknown>
+  const items = Array.isArray(o.items) ? (o.items as Record<string, unknown>[]) : []
+  const categories = Array.isArray(o.categories) ? (o.categories as Record<string, unknown>[]) : []
+  const userNames =
+    o.userNames && typeof o.userNames === 'object'
+      ? (o.userNames as Record<string, string>)
+      : {}
+  return { items, categories, userNames }
+}
+
+export function userDisplay(
+  userNames: Record<string, string>,
+  updatedBy: unknown,
+): string {
+  const id = typeof updatedBy === 'number' ? updatedBy : Number(updatedBy ?? 0)
+  if (!id) return '—'
+  return userNames[String(id)] ?? userNames[id] ?? '—'
+}
+
+export function parseClassesSelection(item: Record<string, unknown>): number[] {
+  const raw = item.classes ?? item.class_list ?? item.class_ids
+  if (Array.isArray(raw)) {
+    return raw.map((x) => Number(x)).filter((n) => n >= 1 && n <= 13)
+  }
+  if (typeof raw === 'string' && raw !== '') {
+    try {
+      const decoded = JSON.parse(raw) as unknown
+      if (Array.isArray(decoded)) {
+        return decoded.map((x) => Number(x)).filter((n) => n >= 1 && n <= 13)
+      }
+    } catch {
+      /* fall through */
+    }
+    const parts = raw.split(/[,\s]+/)
+    return parts.map((p) => Number(p)).filter((n) => n >= 1 && n <= 13 && Number.isFinite(n))
+  }
+  return []
+}