implement error counting tracer side

Author: sezen-datadog

dd-java-agent/appsec/src/main/java/com/datadog/appsec/powerwaf/PowerWAFModule.java

@@ -286,10 +286,8 @@ private boolean initializeNewWafCtx(
       if (initReport != null
           && initReport.getErrors() != null
           && !initReport.getErrors().isEmpty()) {
-        errors.addAll(
-            initReport.getErrors().values().stream()
-                .flatMap(List::stream)
-                .collect(Collectors.toList()));
+
+        WafMetricCollector.get().addWafConfigError(countErrors(initReport));
       }
     } catch (InvalidRuleSetException irse) {
       initReport = irse.ruleSetInfo;
@@ -318,6 +316,24 @@ private boolean initializeNewWafCtx(
     return true;
   }
 
+  private int countErrors(RuleSetInfo initReport) {
+    int count = countErrorsForSection(initReport.rules);
+    count += countErrorsForSection(initReport.customRules);
+    count += countErrorsForSection(initReport.rulesData);
+    count += countErrorsForSection(initReport.rulesOverride);
+    count += countErrorsForSection(initReport.exclusions);
+    count += countErrorsForSection(initReport.exclusionData);
+
+    return count;
+  }
+
+  private int countErrorsForSection(RuleSetInfo.SectionInfo section) {
+    if (section != null && section.getErrors() != null) {
+      return section.getErrors().size();
+    }
+    return 0;
+  }
+
   private Map<String, ActionInfo> calculateEffectiveActions(
       CtxAndAddresses prevContextAndAddresses, AppSecConfig ruleConfig) {
     Map<String, ActionInfo> actionInfoMap;