Optimize landing server rendering

2026-05-30 23:43:07 +08:00
parent 30e9513ce2
commit bf0fbe1b1d
9 changed files with 526 additions and 216 deletions
@@ -0,0 +1,35 @@
+export type LandingLocale = "zh-CN" | "en-US";
+
+export const LANDING_LOCALE_COOKIE = "polyweather.locale";
+export const DEFAULT_LANDING_LOCALE: LandingLocale = "zh-CN";
+
+export function normalizeLandingLocale(value: string | null | undefined): LandingLocale | null {
+  if (!value) return null;
+  const normalized = value.trim().toLowerCase();
+  if (normalized === "zh" || normalized === "zh-cn" || normalized.startsWith("zh-")) {
+    return "zh-CN";
+  }
+  if (normalized === "en" || normalized === "en-us" || normalized.startsWith("en-")) {
+    return "en-US";
+  }
+  return null;
+}
+
+export function pickLandingLocale(
+  cookieLocale: string | null | undefined,
+  acceptLanguage: string | null | undefined,
+): LandingLocale {
+  const fromCookie = normalizeLandingLocale(cookieLocale);
+  if (fromCookie) return fromCookie;
+
+  for (const part of String(acceptLanguage || "").split(",")) {
+    const locale = normalizeLandingLocale(part.split(";")[0]);
+    if (locale) return locale;
+  }
+
+  return DEFAULT_LANDING_LOCALE;
+}
+
+export function nextLandingLocale(locale: LandingLocale): LandingLocale {
+  return locale === "zh-CN" ? "en-US" : "zh-CN";
+}