Function compileRules

packages/node-runtime/src/ai/preprocessor/pipeline.ts:238–260

(
  rules: DesensitizeRule[],
  logger: PreprocessLogger
)

const regexCache = new Map<string, RegExp | null>()

function compileRules(
  rules: DesensitizeRule[],
  logger: PreprocessLogger
): Array<{ regex: RegExp; replacement: string }> {
  const result: Array<{ regex: RegExp; replacement: string }> = []
  for (const rule of rules) {
    let regex = regexCache.get(rule.pattern)
    if (regex === undefined) {
      try {
        regex = new RegExp(rule.pattern, 'g')
        regexCache.set(rule.pattern, regex)
      } catch {
        logger.warn('Preprocess', `Invalid regex in desensitize rule "${rule.id}": ${rule.pattern}`)
        regexCache.set(rule.pattern, null)
        continue
      }
    }
    if (regex) {
      result.push({ regex, replacement: rule.replacement })
    }
  }
  return result
}