Sanitize Filename

script

// See online documentation for examples
// https://docs.getdrafts.com/docs/actions/scripting

// === CONFIGURATION ===
const sanitizationCharacter = '_'; // Change this to '-' or any other safe character

// Allowed characters on both macOS and Windows
const allowedCharactersPattern = new RegExp(`[^A-Za-z0-9 !#$%&'()+,\\-\\.\\;=@[\\]^_\`{}~]`, 'g');

// Get selected text or full draft
let input = editor.getSelectedText();
if (!input || input.trim() === "") {
    input = editor.getText();
}

// Replace invalid characters with the chosen replacement character
let output = input.replace(allowedCharactersPattern, sanitizationCharacter);

// Clean up redundant replacement characters (e.g., "__" => "_")
const escapedSanitizationCharacter = sanitizationCharacter.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
const mergeDuplicateCharactersPattern = new RegExp(`${escapedSanitizationCharacter}{2,}`, 'g');
output = output
    .replace(mergeDuplicateCharactersPattern, sanitizationCharacter)         // collapse repeated
    .replace(new RegExp(`^${escapedSanitizationCharacter}+|${escapedSanitizationCharacter}+$`, 'g'), '')  // trim edges
    .trim();                                              // trim whitespace

// Replace the selected text (or whole draft) with sanitized version
if (editor.getSelectedText()) {
    editor.setSelectedText(output);
} else {
    editor.setText(output);
}