DenozordecandCursor
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- Introduced country-specific handling in traffic flow analytics, including new mappings for country nodes and edges. - Added mock data for countries and their respective service paths to improve visualization in the Network Map. - Updated the `countryName` function to utilize `Intl.DisplayNames` for better localization of country names. - Enhanced tests to validate country handling and ensure accurate representation in flow analytics. Co-authored-by: Cursor <cursoragent@cursor.com>
95 lines
2.9 KiB
TypeScript
95 lines
2.9 KiB
TypeScript
/**
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* Flag — renders a country flag image from an ISO 3166-1 alpha-2 code.
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* Images served from flagcdn.com (free, no auth required).
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*/
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const COUNTRY_NAMES: Record<string, string> = {
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RU: "Россия",
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DE: "Германия",
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NL: "Нидерланды",
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SG: "Сингапур",
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US: "США",
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GB: "Великобритания",
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FR: "Франция",
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FI: "Финляндия",
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SE: "Швеция",
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PL: "Польша",
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UA: "Украина",
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TR: "Турция",
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JP: "Япония",
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HK: "Гонконг",
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}
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let regionNames: Intl.DisplayNames | null | undefined
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function regionDisplayName(iso: string): string | undefined {
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try {
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if (regionNames === undefined) {
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regionNames = typeof Intl !== "undefined" && "DisplayNames" in Intl
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? new Intl.DisplayNames(["ru"], { type: "region" })
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: null
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}
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return regionNames?.of(iso) ?? undefined
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} catch {
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return undefined
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}
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}
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/** Country name in Russian (fallback to ISO code) */
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export function countryName(code: string): string {
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const iso = code.toUpperCase()
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if (!iso) return code
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if (COUNTRY_NAMES[iso]) return COUNTRY_NAMES[iso]
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const intl = regionDisplayName(iso)
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if (intl && intl !== iso) return intl
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return iso
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}
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interface FlagProps {
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code: string
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/** px size — width of the flag image (height auto-scales 3:2 ratio) */
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size?: number
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className?: string
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}
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// flagcdn.com supports only these widths
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const CDN_SIZES = [20, 40, 80, 160, 320, 640, 1280, 2560]
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function nearestCdnSize(px: number): number {
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return CDN_SIZES.find(s => s >= px) ?? CDN_SIZES[CDN_SIZES.length - 1]
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}
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/** CDN URL for SVG `<image href>` (flagcdn widths only). */
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export function flagCdnUrl(code: string, size = 40): string | null {
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const lower = code.toLowerCase()
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if (!/^[a-z]{2}$/.test(lower)) return null
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return `https://flagcdn.com/w${nearestCdnSize(size)}/${lower}.png`
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}
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/**
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* Renders a flag <img> for a given ISO 3166-1 alpha-2 country code.
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* Source: https://flagcdn.com — free CDN, no API key needed.
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*/
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export function Flag({ code, size = 20, className }: FlagProps) {
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if (!code) return null
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const lower = code.toLowerCase()
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if (!/^[a-z]{2}$/.test(lower)) return null
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const name = countryName(code.toUpperCase())
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const cdnSrc = nearestCdnSize(size)
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const cdnSrc2x = nearestCdnSize(size * 2)
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return (
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// Внешний CDN (динамический URL) — next/image без remotePatterns не подходит
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// eslint-disable-next-line @next/next/no-img-element -- flagcdn.com, размеры задаём явно
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<img
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src={`https://flagcdn.com/w${cdnSrc}/${lower}.png`}
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srcSet={`https://flagcdn.com/w${cdnSrc2x}/${lower}.png 2x`}
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width={size}
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height={Math.round(size * 0.75)}
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alt={name}
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title={name}
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className={className}
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style={{ display: "inline-block", verticalAlign: "middle", borderRadius: 2 }}
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/>
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)
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}
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