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/**

 * String formatting utilities for path construction

 * Consolidates repeated padding and path building logic

 */

import { PADDING } from "./constants";

/**

 * Pad number to specified length with leading zeros

 *

 * @param num - Number to pad

 * @param length - Desired string length

 * @returns Zero-padded string

 */
export function padNumber(num: number, length: number): string {
  return num.toString().padStart(length, "0");
}

/**

 * Format episode chunk index with standard padding

 *

 * @param chunkIndex - Chunk index number

 * @returns Padded chunk index string (e.g., "001")

 */
export function formatEpisodeChunk(chunkIndex: number): string {
  return padNumber(chunkIndex, PADDING.EPISODE_CHUNK);
}

/**

 * Format episode index with standard padding

 *

 * @param episodeIndex - Episode index number

 * @returns Padded episode index string (e.g., "000042")

 */
export function formatEpisodeIndex(episodeIndex: number): string {
  return padNumber(episodeIndex, PADDING.EPISODE_INDEX);
}

/**

 * Format file index with standard padding

 *

 * @param fileIndex - File index number

 * @returns Padded file index string (e.g., "001")

 */
export function formatFileIndex(fileIndex: number): string {
  return padNumber(fileIndex, PADDING.FILE_INDEX);
}

/**

 * Format chunk index with standard padding

 *

 * @param chunkIndex - Chunk index number

 * @returns Padded chunk index string (e.g., "001")

 */
export function formatChunkIndex(chunkIndex: number): string {
  return padNumber(chunkIndex, PADDING.CHUNK_INDEX);
}