Split appsec telemetry file into rasp, waf and user (#5303)

* Split appsec telemetry file into rasp, waf and user

* split appsec telemetry test files

* remove unused success param

* fix user test file name

packages/dd-trace/src/appsec/telemetry/common.js

@@ -0,0 +1,24 @@
+'use strinct'
+
+const DD_TELEMETRY_REQUEST_METRICS = Symbol('_dd.appsec.telemetry.request.metrics')
+
+const tags = {
+  REQUEST_BLOCKED: 'request_blocked',
+  RULE_TRIGGERED: 'rule_triggered',
+  WAF_TIMEOUT: 'waf_timeout',
+  WAF_VERSION: 'waf_version',
+  EVENT_RULES_VERSION: 'event_rules_version'
+}
+
+function getVersionsTags (wafVersion, rulesVersion) {
+  return {
+    [tags.WAF_VERSION]: wafVersion,
+    [tags.EVENT_RULES_VERSION]: rulesVersion
+  }
+}
+
+module.exports = {
+  tags,
+  getVersionsTags,
+  DD_TELEMETRY_REQUEST_METRICS
+}

packages/dd-trace/src/appsec/telemetry/index.js

@@ -0,0 +1,126 @@
+'use strict'
+
+const { DD_TELEMETRY_REQUEST_METRICS } = require('./common')
+const { addRaspRequestMetrics, trackRaspMetrics } = require('./rasp')
+const { incrementMissingUserId, incrementMissingUserLogin } = require('./user')
+const {
+  addWafRequestMetrics,
+  trackWafMetrics,
+  incrementWafInit,
+  incrementWafUpdates,
+  incrementWafRequests
+} = require('./waf')
+
+const metricsStoreMap = new WeakMap()
+
+let enabled = false
+
+function enable (telemetryConfig) {
+  enabled = telemetryConfig?.enabled && telemetryConfig.metrics
+}
+
+function disable () {
+  enabled = false
+}
+
+function newStore () {
+  return {
+    [DD_TELEMETRY_REQUEST_METRICS]: {
+      duration: 0,
+      durationExt: 0,
+      raspDuration: 0,
+      raspDurationExt: 0,
+      raspEvalCount: 0
+    }
+  }
+}
+
+function getStore (req) {
+  let store = metricsStoreMap.get(req)
+  if (!store) {
+    store = newStore()
+    metricsStoreMap.set(req, store)
+  }
+  return store
+}
+
+function updateRaspRequestsMetricTags (metrics, req, raspRule) {
+  if (!req) return
+
+  const store = getStore(req)
+
+  // it does not depend on whether telemetry is enabled or not
+  addRaspRequestMetrics(store, metrics)
+
+  if (!enabled) return
+
+  trackRaspMetrics(metrics, raspRule)
+}
+
+function updateWafRequestsMetricTags (metrics, req) {
+  if (!req) return
+
+  const store = getStore(req)
+
+  // it does not depend on whether telemetry is enabled or not
+  addWafRequestMetrics(store, metrics)
+
+  if (!enabled) return
+
+  return trackWafMetrics(store, metrics)
+}
+
+function incrementWafInitMetric (wafVersion, rulesVersion) {
+  if (!enabled) return
+
+  incrementWafInit(wafVersion, rulesVersion)
+}
+
+function incrementWafUpdatesMetric (wafVersion, rulesVersion) {
+  if (!enabled) return
+
+  incrementWafUpdates(wafVersion, rulesVersion)
+}
+
+function incrementWafRequestsMetric (req) {
+  if (!req || !enabled) return
+
+  const store = getStore(req)
+  incrementWafRequests(store)
+
+  metricsStoreMap.delete(req)
+}
+
+function incrementMissingUserLoginMetric (framework, eventType) {
+  if (!enabled) return
+
+  incrementMissingUserLogin(framework, eventType)
+}
+
+function incrementMissingUserIdMetric (framework, eventType) {
+  if (!enabled) return
+
+  incrementMissingUserId(framework, eventType)
+}
+
+function getRequestMetrics (req) {
+  if (req) {
+    const store = getStore(req)
+    return store?.[DD_TELEMETRY_REQUEST_METRICS]
+  }
+}
+
+module.exports = {
+  enable,
+  disable,
+
+  updateWafRequestsMetricTags,
+  updateRaspRequestsMetricTags,
+  incrementWafInitMetric,
+  incrementWafUpdatesMetric,
+  incrementWafRequestsMetric,
+  incrementMissingUserLoginMetric,
+  incrementMissingUserIdMetric,
+
+  getRequestMetrics
+}