Initial commit

src/lib/format.ts

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+import type { InventoryItem, ProductImage } from '../types'
+
+const DAY_MS = 86_400_000
+
+export function parseDate(value?: string | null): Date | null {
+  if (!value) return null
+  const date = new Date(value)
+  return Number.isNaN(date.getTime()) ? null : date
+}
+
+export function daysUntil(value?: string | null): number | null {
+  const date = parseDate(value)
+  if (!date) return null
+  const today = new Date()
+  today.setHours(0, 0, 0, 0)
+  date.setHours(0, 0, 0, 0)
+  return Math.ceil((date.getTime() - today.getTime()) / DAY_MS)
+}
+
+export function expiryLabel(value?: string | null): string {
+  const days = daysUntil(value)
+  if (days === null) return 'No expiry set'
+  if (days < 0) return `Expired ${Math.abs(days)}d ago`
+  if (days === 0) return 'Expires today'
+  if (days === 1) return 'Expires tomorrow'
+  return `Expires in ${days} days`
+}
+
+export function expiryTone(value?: string | null): 'danger' | 'warning' | 'good' | 'neutral' {
+  const days = daysUntil(value)
+  if (days === null) return 'neutral'
+  if (days < 0) return 'danger'
+  if (days <= 3) return 'warning'
+  return 'good'
+}
+
+export function formatDate(value?: string | null): string {
+  const date = parseDate(value)
+  if (!date) return 'Not set'
+  return new Intl.DateTimeFormat('en-GB', { day: 'numeric', month: 'short', year: 'numeric' }).format(date)
+}
+
+export function toDateInput(value?: string | null): string {
+  if (!value) return ''
+  return value.slice(0, 10)
+}
+
+export function toApiDate(value: string): string | undefined {
+  return value ? `${value}T00:00:00` : undefined
+}
+
+export function displayName(firstName?: string | null, lastName?: string | null, email?: string) {
+  const name = [firstName, lastName].filter(Boolean).join(' ')
+  return name || email || 'Keeply user'
+}
+
+export function itemImage(item: InventoryItem): string | null {
+  const images = item.itemLookupImages
+  if (!Array.isArray(images)) return null
+  const first = images[0] as ProductImage | string | undefined
+  if (typeof first === 'string') return first
+  if (!first || typeof first !== 'object') return null
+  const url = first.url ?? first.image_url
+  return typeof url === 'string' ? url : null
+}
+
+export function productSize(value: unknown): string | null {
+  if (typeof value === 'string' || typeof value === 'number') return String(value)
+  if (value && typeof value === 'object') {
+    const record = value as Record<string, unknown>
+    const size = record.value ?? record.display ?? record.text
+    if (typeof size === 'string' || typeof size === 'number') return String(size)
+  }
+  return null
+}
+
+export function getInitials(firstName?: string | null, lastName?: string | null, email?: string) {
+  const letters = [firstName, lastName].filter(Boolean).map((part) => String(part)[0])
+  if (letters.length) return letters.join('').toUpperCase()
+  return (email?.[0] ?? 'K').toUpperCase()
+}