my changes

assets/swagger.json

@@ -2011,6 +2011,42 @@
         }
       }
     },
+    "/api/v1/applicationsets/{name}/events": {
+      "get": {
+        "tags": [
+          "ApplicationSetService"
+        ],
+        "summary": "ListResourceEvents returns a list of event resources",
+        "operationId": "ApplicationSetService_ListResourceEvents",
+        "parameters": [
+          {
+            "type": "string",
+            "name": "name",
+            "in": "path",
+            "required": true
+          },
+          {
+            "type": "string",
+            "name": "appsetNamespace",
+            "in": "query"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "A successful response.",
+            "schema": {
+              "$ref": "#/definitions/v1EventList"
+            }
+          },
+          "default": {
+            "description": "An unexpected error response.",
+            "schema": {
+              "$ref": "#/definitions/runtimeError"
+            }
+          }
+        }
+      }
+    },
     "/api/v1/certificates": {
       "get": {
         "tags": [

server/applicationset/applicationset.go

@@ -16,6 +16,7 @@ import (
 	v1 "k8s.io/api/core/v1"
 	apierr "k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/fields"
 	"k8s.io/apimachinery/pkg/labels"
 	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/tools/cache"
@@ -39,6 +40,7 @@ type Server struct {
 	ns                string
 	db                db.ArgoDB
 	enf               *rbac.Enforcer
+	kubeclientset     kubernetes.Interface
 	appclientset      appclientset.Interface
 	appsetInformer    cache.SharedIndexInformer
 	appsetLister      applisters.ApplicationSetLister
@@ -67,6 +69,7 @@ func NewServer(
 		ns:                namespace,
 		db:                db,
 		enf:               enf,
+		kubeclientset:     kubeclientset,
 		appclientset:      appclientset,
 		appsetInformer:    appsetInformer,
 		appsetLister:      appsetLister,
@@ -280,6 +283,38 @@ func (s *Server) Delete(ctx context.Context, q *applicationset.ApplicationSetDel
 
 }
 
+// ListResourceEvents returns a list of event resources
+func (s *Server) ListResourceEvents(ctx context.Context, q *applicationset.ApplicationSetResourceEventsQuery) (*v1.EventList, error) {
+	namespace := s.appsetNamespaceOrDefault(q.AppsetNamespace)
+
+	if !s.isNamespaceEnabled(namespace) {
+		return nil, security.NamespaceNotPermittedError(namespace)
+	}
+
+	a, err := s.appclientset.ArgoprojV1alpha1().ApplicationSets(namespace).Get(ctx, q.Name, metav1.GetOptions{})
+	if err != nil {
+		return nil, fmt.Errorf("error getting ApplicationSet: %w", err)
+	}
+
+	if err = s.enf.EnforceErr(ctx.Value("claims"), rbacpolicy.ResourceApplicationSets, rbacpolicy.ActionGet, a.RBACName(s.ns)); err != nil {
+		return nil, err
+	}
+
+	fieldSelector := fields.SelectorFromSet(map[string]string{
+		"involvedObject.name":      a.Name,
+		"involvedObject.uid":       string(a.UID),
+		"involvedObject.namespace": a.Namespace,
+	}).String()
+
+	log.Infof("Querying for resource events with field selector: %s", fieldSelector)
+	opts := metav1.ListOptions{FieldSelector: fieldSelector}
+	list, err := s.kubeclientset.CoreV1().Events(namespace).List(ctx, opts)
+	if err != nil {
+		return nil, fmt.Errorf("error listing resource events: %w", err)
+	}
+	return list, nil
+}
+
 func (s *Server) validateAppSet(ctx context.Context, appset *v1alpha1.ApplicationSet) (string, error) {
 	if appset == nil {
 		return "", fmt.Errorf("ApplicationSet cannot be validated for nil value")

server/applicationset/applicationset.proto

@@ -8,6 +8,7 @@ option go_package = "github.com/argoproj/argo-cd/v2/pkg/apiclient/applicationset
 package applicationset;
 
 import "google/api/annotations.proto";
+import "k8s.io/api/core/v1/generated.proto";
 import "github.com/argoproj/argo-cd/v2/pkg/apis/application/v1alpha1/generated.proto";
 
 // ApplicationSetGetQuery is a query for applicationset resources
@@ -28,6 +29,13 @@ message ApplicationSetListQuery {
 }
 
 
+// ApplicationSetEventsQuery is a query for applicationset resource events
+message ApplicationSetResourceEventsQuery {
+	string name = 1;
+	string appsetNamespace = 5;
+}
+
+
 message ApplicationSetResponse {
 	string project = 1;
 	github.com.argoproj.argo_cd.v2.pkg.apis.application.v1alpha1.ApplicationSet applicationset = 2;
@@ -60,6 +68,11 @@ service ApplicationSetService {
 		option (google.api.http).get = "/api/v1/applicationsets";
 	}
 
+	// ListResourceEvents returns a list of event resources
+	rpc ListResourceEvents(ApplicationSetResourceEventsQuery) returns (k8s.io.api.core.v1.EventList) {
+		option (google.api.http).get = "/api/v1/applicationsets/{name}/events";
+	}
+
 	//Create creates an applicationset
 	rpc Create (ApplicationSetCreateRequest) returns (github.com.argoproj.argo_cd.v2.pkg.apis.application.v1alpha1.ApplicationSet) {
 		option (google.api.http) = {
@@ -73,4 +86,4 @@ service ApplicationSetService {
 		option (google.api.http).delete = "/api/v1/applicationsets/{name}";
 	}
 
-}
+}