Validate filter payload

Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>

apiserver/events/events.go

@@ -3,6 +3,7 @@ package events
 import (
 	"context"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"log/slog"
 	"sync"
@@ -163,8 +164,14 @@ func (e *EventHandler) HandleClientMessages(message []byte) error {
 		return nil
 	}
 
-	if len(opt.Filters) == 0 && !opt.SendEverything {
-		slog.DebugContext(e.ctx, "no filters provided; ignoring")
+	if err := opt.Validate(); err != nil {
+		if errors.Is(err, common.ErrNoFiltersProvided) {
+			slog.DebugContext(e.ctx, "no filters provided; ignoring")
+			return nil
+		}
+		slog.ErrorContext(e.ctx, "invalid filter", "error", err)
+		e.client.Write([]byte("invalid filter"))
+		e.Stop()
 		return nil
 	}
 

apiserver/events/params.go

@@ -11,9 +11,20 @@ type Filter struct {
 
 func (f Filter) Validate() error {
 	switch f.EntityType {
-	case common.RepositoryEntityType, common.OrganizationEntityType, common.EnterpriseEntityType, common.PoolEntityType, common.UserEntityType, common.InstanceEntityType, common.JobEntityType, common.ControllerEntityType, common.GithubCredentialsEntityType, common.GithubEndpointEntityType:
+	case common.RepositoryEntityType, common.OrganizationEntityType, common.EnterpriseEntityType,
+		common.PoolEntityType, common.UserEntityType, common.InstanceEntityType,
+		common.JobEntityType, common.ControllerEntityType, common.GithubCredentialsEntityType,
+		common.GithubEndpointEntityType:
 	default:
-		return nil
+		return common.ErrInvalidEntityType
+	}
+
+	for _, op := range f.Operations {
+		switch op {
+		case common.CreateOperation, common.UpdateOperation, common.DeleteOperation:
+		default:
+			return common.ErrInvalidOperationType
+		}
 	}
 	return nil
 }
@@ -22,3 +33,18 @@ type Options struct {
 	SendEverything bool     `json:"send_everything"`
 	Filters        []Filter `json:"filters"`
 }
+
+func (o Options) Validate() error {
+	if o.SendEverything {
+		return nil
+	}
+	if len(o.Filters) == 0 {
+		return common.ErrNoFiltersProvided
+	}
+	for _, f := range o.Filters {
+		if err := f.Validate(); err != nil {
+			return err
+		}
+	}
+	return nil
+}