Function applyTruncation

actions/setup/js/sanitize_content_core.cjs:1002–1023

* Apply truncation limits to content * @param {string} content - The content to truncate * @param {number} [maxLength] - Maximum length of content (default: 524288) * @returns {string} The truncated content

(content, maxLength)

 * @returns {string} The truncated content
 */
function applyTruncation(content, maxLength) {
  maxLength = maxLength || 524288;
  const lines = content.split("\n");
  const maxLines = 65000;

  // If content has too many lines, truncate by lines (primary limit)
  if (lines.length > maxLines) {
    const truncationMsg = "\n[Content truncated due to line count]";
    const truncatedLines = lines.slice(0, maxLines).join("\n") + truncationMsg;

    // If still too long after line truncation, shorten but keep the line count message
    if (truncatedLines.length > maxLength) {
      return truncatedLines.substring(0, maxLength - truncationMsg.length) + truncationMsg;
    } else {
      return truncatedLines;
    }
  } else if (content.length > maxLength) {
    return content.substring(0, maxLength) + "\n[Content truncated due to length]";
  }

  return content;
}

/**
 * Decodes HTML entities to prevent bypass of @mention detection and to ensure