/**
 * Retrieves the MIME type for a given file name based on its extension.
 * @param fileName - The name of the file to extract the MIME type for.
 * @returns The MIME type if found, or null if not found.
 */
export declare const getMimeType: (fileName: string) => string | null;
/**
 * Extracts numeric IDs from a string in the format [Name:ID].
 * @param input - The input string containing IDs in the format [Name:ID].
 * @returns An array of extracted numeric IDs.
 */
export declare const extractIds: (input: string) => number[];
/**
 * Decrypts an encoded string using a salt.
 * @param salt - The salt used for decryption.
 * @param encoded - The encoded string to decrypt.
 * @returns The decrypted string.
 */
export declare const decrypt: (salt: string, encoded: string) => string;
/**
 * Encrypts a plain text string using a salt.
 * @param salt - The salt used for encryption.
 * @param text - The plain text string to encrypt.
 * @returns The encrypted string in hexadecimal format.
 */
export declare const encrypt: (salt: string, text: string) => string;
/**
 * Returns the start and end dates of the current week.
 * The week starts on Monday (00:00:00.000) and ends on Sunday (23:59:59.999).
 *
 * @returns An object containing:
 *   - `startOfWeek`: Date representing the beginning of the current week (Monday at midnight).
 *   - `endOfWeek`: Date representing the end of the current week (Sunday at 23:59:59.999).
 */
export declare const getCurrentWeek: () => {
    startOfWeek: Date;
    endOfWeek: Date;
};
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