Use minimal replacement class for MessageModel

ts/util/isMessageEmpty.ts

@@ -0,0 +1,97 @@
+// Copyright 2024 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { messageHasPaymentEvent } from '../messages/helpers';
+import type { MessageAttributesType } from '../model-types';
+import {
+  hasErrors,
+  isCallHistory,
+  isChatSessionRefreshed,
+  isConversationMerge,
+  isDeliveryIssue,
+  isEndSession,
+  isExpirationTimerUpdate,
+  isGiftBadge,
+  isGroupUpdate,
+  isGroupV2Change,
+  isKeyChange,
+  isPhoneNumberDiscovery,
+  isProfileChange,
+  isTapToView,
+  isTitleTransitionNotification,
+  isUniversalTimerNotification,
+  isUnsupportedMessage,
+  isVerifiedChange,
+} from '../state/selectors/message';
+
+export function isMessageEmpty(attributes: MessageAttributesType): boolean {
+  // Core message types - we check for all four because they can each stand alone
+  const hasBody = Boolean(attributes.body);
+  const hasAttachment = (attributes.attachments || []).length > 0;
+  const hasEmbeddedContact = (attributes.contact || []).length > 0;
+  const isSticker = Boolean(attributes.sticker);
+
+  // Rendered sync messages
+  const isCallHistoryValue = isCallHistory(attributes);
+  const isChatSessionRefreshedValue = isChatSessionRefreshed(attributes);
+  const isDeliveryIssueValue = isDeliveryIssue(attributes);
+  const isGiftBadgeValue = isGiftBadge(attributes);
+  const isGroupUpdateValue = isGroupUpdate(attributes);
+  const isGroupV2ChangeValue = isGroupV2Change(attributes);
+  const isEndSessionValue = isEndSession(attributes);
+  const isExpirationTimerUpdateValue = isExpirationTimerUpdate(attributes);
+  const isVerifiedChangeValue = isVerifiedChange(attributes);
+
+  // Placeholder messages
+  const isUnsupportedMessageValue = isUnsupportedMessage(attributes);
+  const isTapToViewValue = isTapToView(attributes);
+
+  // Errors
+  const hasErrorsValue = hasErrors(attributes);
+
+  // Locally-generated notifications
+  const isKeyChangeValue = isKeyChange(attributes);
+  const isProfileChangeValue = isProfileChange(attributes);
+  const isUniversalTimerNotificationValue =
+    isUniversalTimerNotification(attributes);
+  const isConversationMergeValue = isConversationMerge(attributes);
+  const isPhoneNumberDiscoveryValue = isPhoneNumberDiscovery(attributes);
+  const isTitleTransitionNotificationValue =
+    isTitleTransitionNotification(attributes);
+
+  const isPayment = messageHasPaymentEvent(attributes);
+
+  // Note: not all of these message types go through message.handleDataMessage
+
+  const hasSomethingToDisplay =
+    // Core message types
+    hasBody ||
+    hasAttachment ||
+    hasEmbeddedContact ||
+    isSticker ||
+    isPayment ||
+    // Rendered sync messages
+    isCallHistoryValue ||
+    isChatSessionRefreshedValue ||
+    isDeliveryIssueValue ||
+    isGiftBadgeValue ||
+    isGroupUpdateValue ||
+    isGroupV2ChangeValue ||
+    isEndSessionValue ||
+    isExpirationTimerUpdateValue ||
+    isVerifiedChangeValue ||
+    // Placeholder messages
+    isUnsupportedMessageValue ||
+    isTapToViewValue ||
+    // Errors
+    hasErrorsValue ||
+    // Locally-generated notifications
+    isKeyChangeValue ||
+    isProfileChangeValue ||
+    isUniversalTimerNotificationValue ||
+    isConversationMergeValue ||
+    isPhoneNumberDiscoveryValue ||
+    isTitleTransitionNotificationValue;
+
+  return !hasSomethingToDisplay;
+}