1 files changed, 56 insertions, 0 deletions
diff --git a/src/utils/lang.ts b/src/utils/lang.ts
new file mode 100644
index 0000000..2ce8fe4
--- /dev/null
+++ b/src/utils/lang.ts
@@ -0,0 +1,56 @@
+export const LANGUAGE_DEFAULTS = Object.freeze({
+  pt: "PT",
+  en: "GB",
+  fr: "FR",
+});
+
+/**
+ * AI thought me this.
+ *
+ * Explanation:
+ * * Each letter in a 2-letter country code is converted to a Regional
+ *   Indicator Symbol, which together form the emoji flag.
+ * * 'A'.charCodeAt(0) is 65, and '🇦' starts at 0x1F1E6 → offset of 127397
+ *   (0x1F1A5).
+ * * So 'A' → '🇦', 'B' → '🇧', etc.
+ *
+ * The flags are the combination of those emojis making the country code like
+ * Portugal -> PT.
+ */
+export function getFlagEmojiFromLocale(locale: string): string {
+  let countryCode: string | undefined;
+
+  const parts = locale.split("-");
+  const lang = parts[0].toLowerCase();
+  if (parts.length === 2) {
+    countryCode = parts[1].toUpperCase();
+  } else if (lang in LANGUAGE_DEFAULTS) {
+    countryCode = LANGUAGE_DEFAULTS[lang as keyof typeof LANGUAGE_DEFAULTS];
+  }
+
+  if (!countryCode) return "";
+
+  return [...countryCode]
+    .map((c) => String.fromCodePoint(c.charCodeAt(0) + 127397))
+    .join("");
+}
+
+export function getLanguageNameFromLocale(locale: string): string {
+  try {
+    return new Intl.DisplayNames([locale], {
+      type: "language",
+      fallback: "code",
+    }).of(locale) ?? "";
+  } catch {
+    return "";
+  }
+}
+
+export function isValidLocale(locale: string): boolean {
+  try {
+    Intl.getCanonicalLocales(locale);
+    return true;
+  } catch {
+    return false;
+  }
+}