Rework command center for race weekends

frontend/src/lib/gpIdentity.ts

@@ -0,0 +1,66 @@
+import type { Meeting } from '../types'
+
+const COUNTRY_ACCENTS: Record<string, string> = {
+  ITA: '#1f7a4d',
+  GBR: '#3a6cf5',
+  USA: '#d62828',
+  MON: '#d61a3e',
+  ESP: '#e7a90b',
+  FRA: '#2353d6',
+  GER: '#cdc7c2',
+  DEU: '#cdc7c2',
+  BEL: '#e0a01b',
+  NLD: '#ef7c1a',
+  HUN: '#3f8a4b',
+  AUT: '#c61f1f',
+  AZE: '#1f7eaf',
+  CAN: '#c8202c',
+  AUS: '#1b6b86',
+  JPN: '#c8202c',
+  SGP: '#c8202c',
+  BRA: '#2fa84f',
+  BHR: '#a8132b',
+  SAU: '#0a7a3b',
+  ARE: '#4d6b2a',
+  QAT: '#7a1e3e',
+  CHN: '#c8202c',
+  MEX: '#1f7a4d',
+}
+
+const DEFAULT_ACCENT = '#9aa0a6'
+
+export function countryAccent(meeting: Meeting | undefined | null): string {
+  if (!meeting) return DEFAULT_ACCENT
+  const code = meeting.country_code?.toUpperCase()
+  if (code && COUNTRY_ACCENTS[code]) return COUNTRY_ACCENTS[code]
+  return DEFAULT_ACCENT
+}
+
+export function countryDecal(meeting: Meeting | undefined | null): string {
+  const code = meeting?.country_code?.toUpperCase()
+  if (code && code.length >= 2) return code.slice(0, 3)
+  const name = meeting?.country_name ?? ''
+  return name.slice(0, 3).toUpperCase() || '—'
+}
+
+export function formatGpDateRange(meeting: Meeting | undefined | null): string {
+  if (!meeting) return ''
+  const start = meeting.date_start?.slice(0, 10)
+  const end = meeting.date_end?.slice(0, 10)
+  if (!start && !end) return ''
+  const fmt = (iso: string): string => {
+    const d = new Date(iso)
+    if (Number.isNaN(d.getTime())) return iso
+    return d.toLocaleDateString('en-GB', { day: 'numeric', month: 'short' })
+  }
+  if (start && end && start !== end) {
+    const left = fmt(start)
+    const right = fmt(end)
+    const year = end.slice(0, 4)
+    return `${left} – ${right} ${year}`
+  }
+  if (start) {
+    return `${fmt(start)} ${start.slice(0, 4)}`
+  }
+  return end ? `${fmt(end)} ${end.slice(0, 4)}` : ''
+}