async function precomputeRuleSummaries()

in parseRuleData.ts [290:323]

• 26 lines of code
• 1 McCabe index (conditional complexity)

async function precomputeRuleSummaries() {
  const ruleSummaries: RuleSummary[] = [];

  const tagSummaries = new Map<string, TagSummary>();

  fs.mkdirSync(RULES_OUTPUT_PATH, { recursive: true });

  await getPrebuiltDetectionRules(ruleSummaries, tagSummaries);

  console.log(`loaded ${ruleSummaries.length} rules`);
  console.log(`example rule:`);
  console.log(ruleSummaries[0]);
  console.log(`found ${tagSummaries.size} tags`);
  console.log(`example tag:`);
  console.log(tagSummaries.get('Data Source: APM'));

  const newestRules = ruleSummaries.sort(
    (a, b) => b.updated_date.getTime() - a.updated_date.getTime()
  );
  console.log(
    `Parsed ${newestRules.length} rules. Newest rule is '${newestRules[0].name}', updated '${newestRules[0].updated_date}'.`
  );

  fs.writeFileSync('./src/data/newestRules.json', JSON.stringify(newestRules));

  const popularTags = Array.from(tagSummaries.values()).sort(
    (a, b) => b.count - a.count
  );
  console.log(
    `Parsed ${popularTags.length} tags. Most popular tag is '${popularTags[0].tag_full}' with '${popularTags[0].count}' rules.`
  );

  fs.writeFileSync('./src/data/tagSummaries.json', JSON.stringify(popularTags));
}