/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
/**
 * Safely replaces text with literal strings, avoiding ECMAScript GetSubstitution issues.
 * Escapes $ characters to prevent template interpretation.
 */
export function safeLiteralReplace(str, oldString, newString) {
    if (oldString === '' || !str.includes(oldString)) {
        return str;
    }
    if (!newString.includes('$')) {
        return str.replaceAll(oldString, newString);
    }
    const escapedNewString = newString.replaceAll('$', '$$$$');
    return str.replaceAll(oldString, escapedNewString);
}
/**
 * Checks if a Buffer is likely binary by testing for the presence of a NULL byte.
 * The presence of a NULL byte is a strong indicator that the data is not plain text.
 * @param data The Buffer to check.
 * @param sampleSize The number of bytes from the start of the buffer to test.
 * @returns True if a NULL byte is found, false otherwise.
 */
export function isBinary(data, sampleSize = 512) {
    if (!data) {
        return false;
    }
    const sample = data.length > sampleSize ? data.subarray(0, sampleSize) : data;
    for (const byte of sample) {
        // The presence of a NULL byte (0x00) is one of the most reliable
        // indicators of a binary file. Text files should not contain them.
        if (byte === 0) {
            return true;
        }
    }
    // If no NULL bytes were found in the sample, we assume it's text.
    return false;
}
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