tests in typescript

back/utils/string.ts

@@ -0,0 +1,19 @@
+export function transformEmojis(str :string): string {
+    if (!str) return str;
+    // Use a regular expression to match emojis in the string
+    const regex =
+        /[\u{1F600}-\u{1F64F}\u{1F300}-\u{1F5FF}\u{1F680}-\u{1F6FF}\u{2600}-\u{26FF}\u{2700}-\u{27BF}\u{1F900}-\u{1F9FF}\u{1F1E0}-\u{1F1FF}]/gu;
+
+    // Replace each matched emoji with its Unicode code point
+    const transformedStr = str.replace(regex, (match) => {
+        return "\\u{" + match.codePointAt(0)?.toString(16).toUpperCase() + "}";
+    });
+
+    return transformedStr;
+}
+
+export function decodeEmojis(text: string): string {
+    const regex = /\\u{([^}]+)}/g;
+    const decodedText = text.replace(regex, (_, hex) => String.fromCodePoint(parseInt(hex, 16)));
+    return decodedText;
+}