fd-frame/src/base64.ts

/**
 * Base64 implementation with UTF-8 support
 * Replaces the previous UMD module to ensure correct bundling
 */
export const Base64 = {
  /**
   * Decode Base64 string to UTF-8 string
   */
  decode(str: string): string {
    try {
      // Use TextDecoder for proper UTF-8 handling
      const binaryString = window.atob(str);
      const bytes = new Uint8Array(binaryString.length);
      for (let i = 0; i < binaryString.length; i++) {
        bytes[i] = binaryString.charCodeAt(i);
      }
      return new TextDecoder().decode(bytes);
    } catch (e) {
      console.error('Base64 decode error:', e);
      return '';
    }
  },

  /**
   * Encode UTF-8 string to Base64
   */
  encode(str: string): string {
    try {
      const bytes = new TextEncoder().encode(str);
      const binaryString = Array.from(bytes, (byte) => String.fromCharCode(byte)).join("");
      return window.btoa(binaryString);
    } catch (e) {
      console.error('Base64 encode error:', e);
      return '';
    }
  }
};

export default Base64;