feat: add models package

packages/models/src/Domain/Runtime/Collection/Payload/PayloadCollection.ts

@@ -0,0 +1,21 @@
+import { FullyFormedPayloadInterface } from './../../../Abstract/Payload/Interfaces/UnionTypes'
+import { EncryptedPayloadInterface } from '../../../Abstract/Payload/Interfaces/EncryptedPayload'
+import { CollectionInterface } from '../CollectionInterface'
+import { DecryptedPayloadInterface } from '../../../Abstract/Payload/Interfaces/DecryptedPayload'
+import { IntegrityPayload } from '@standardnotes/responses'
+import { Collection } from '../Collection'
+import { DeletedPayloadInterface } from '../../../Abstract/Payload'
+
+export class PayloadCollection<P extends FullyFormedPayloadInterface = FullyFormedPayloadInterface>
+  extends Collection<P, DecryptedPayloadInterface, EncryptedPayloadInterface, DeletedPayloadInterface>
+  implements CollectionInterface
+{
+  public integrityPayloads(): IntegrityPayload[] {
+    const nondeletedElements = this.nondeletedElements()
+
+    return nondeletedElements.map((item) => ({
+      uuid: item.uuid,
+      updated_at_timestamp: item.serverUpdatedAtTimestamp as number,
+    }))
+  }
+}