fix: improve GetPushEventPayload

Author: wolfogre

Diff for: models/actions/run.go

@@ -119,13 +119,29 @@ func (run *ActionRun) Duration() time.Duration {
 
 func (run *ActionRun) GetPushEventPayload() (*api.PushPayload, error) {
 	if run.Event == webhook_module.HookEventPush {
-		var payload api.PushPayload
-		if err := json.Unmarshal([]byte(run.EventPayload), &payload); err != nil {
-			return nil, err
-		}
-		return &payload, nil
+		return nil, fmt.Errorf("event %s is not a push event", run.Event)
+	}
+
+	payload := &api.PushPayload{}
+	if err := json.Unmarshal([]byte(run.EventPayload), payload); err != nil {
+		return nil, err
+	}
+
+	// Since it comes from json unmarshal, we should check if it's broken
+	if payload.HeadCommit == nil {
+		return nil, fmt.Errorf("nil HeadCommit")
+	}
+	if payload.Repo == nil {
+		return nil, fmt.Errorf("nil Repo")
+	}
+	if payload.Pusher == nil {
+		return nil, fmt.Errorf("nil Pusher")
 	}
-	return nil, fmt.Errorf("event %s is not a push event", run.Event)
+	if payload.Sender == nil {
+		return nil, fmt.Errorf("nil Sender")
+	}
+
+	return payload, nil
 }
 
 func updateRepoRunsNumbers(ctx context.Context, repo *repo_model.Repository) error {