@mikezimm/fps-core-v7/lib/logic/Math/convertFileSizeStringToNum.js

Library of reusable core interfaces, types and constants migrated from fps-library-v2

/**
 *   2024-11-17:  Migrate to fps-core-v7 to @mikezim/fps-core-v7/lib/logic/Math/convertFileSizeStringToNum
 */
export const FileSizeScaleOptions = ['KB', 'MB', 'GB', 'TB'];
export const FileSizeScaleRegex = /^(\d+(\.\d+)?)\s*(KB|MB|GB|TB)$/i;
/**
 * Will convert a string like 1kb or 1KB to 1024
 * @param fileSize
 * @returns
 */
export function convertFileSizeStringToNum(fileSize = '') {
    // 2024-12-04:  Added type check to be safe
    if (typeof fileSize === 'number')
        return fileSize;
    // Extract the numeric part and the unit part (KB, MB, GB, TB, etc.)
    const match = fileSize.trim().match(FileSizeScaleRegex);
    if (!match)
        return parseInt(fileSize);
    const numValue = parseFloat(match[1]);
    const unit = match[3].toUpperCase();
    // Find the index of the scale unit
    const index = FileSizeScaleOptions.indexOf(unit);
    if (index === -1) {
        throw new Error("Unsupported unit");
    }
    // Return the number converted to bytes
    return numValue * Math.pow(1024, index + 1);
}
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