Add Symfony payload mapping, fixtures, and QA tooling

client/src/lib/utils.ts

@@ -0,0 +1,78 @@
+import { type ClassValue, clsx } from 'clsx'
+import { twMerge } from 'tailwind-merge'
+
+export type Coordinates = {
+  lat: number
+  lng: number
+}
+
+export function cn(...inputs: ClassValue[]): string {
+  return twMerge(clsx(inputs))
+}
+
+export function formatCoordinate(value: number): string {
+  const formatter = new Intl.NumberFormat('en-US', {
+    minimumFractionDigits: 3,
+    maximumFractionDigits: 3,
+  })
+  return formatter.format(value)
+}
+
+export function formatRelativeTime(dateIso: string): string {
+  const date = new Date(dateIso)
+  const now = new Date()
+  const diff = Math.max(0, now.getTime() - date.getTime())
+
+  const seconds = Math.floor(diff / 1000)
+  if (seconds < 60) {
+    return `${seconds}s ago`
+  }
+
+  const minutes = Math.floor(seconds / 60)
+  if (minutes < 60) {
+    return `${minutes}m ago`
+  }
+
+  const hours = Math.floor(minutes / 60)
+  if (hours < 24) {
+    return `${hours}h ago`
+  }
+
+  const days = Math.floor(hours / 24)
+  if (days < 7) {
+    return `${days}d ago`
+  }
+
+  const weeks = Math.floor(days / 7)
+  return `${weeks}w ago`
+}
+
+export function formatTimestamp(dateIso: string): string {
+  const date = new Date(dateIso)
+  return new Intl.DateTimeFormat('en-US', {
+    month: 'short',
+    day: 'numeric',
+    hour: 'numeric',
+    minute: '2-digit',
+  }).format(date)
+}
+
+const EARTH_RADIUS_KM = 6371
+
+export function distanceInKm(a: Coordinates, b: Coordinates): number {
+  const lat1 = toRadians(a.lat)
+  const lat2 = toRadians(b.lat)
+  const deltaLat = toRadians(b.lat - a.lat)
+  const deltaLng = toRadians(b.lng - a.lng)
+
+  const haversine =
+    Math.sin(deltaLat / 2) * Math.sin(deltaLat / 2) +
+    Math.cos(lat1) * Math.cos(lat2) * Math.sin(deltaLng / 2) * Math.sin(deltaLng / 2)
+
+  const c = 2 * Math.atan2(Math.sqrt(haversine), Math.sqrt(1 - haversine))
+  return EARTH_RADIUS_KM * c
+}
+
+function toRadians(value: number): number {
+  return (value * Math.PI) / 180
+}