feat: add models package

packages/models/src/Domain/Utilities/Payload/CreatePayload.ts

@@ -0,0 +1,26 @@
+import { EncryptedPayload } from '../../Abstract/Payload/Implementations/EncryptedPayload'
+import { DeletedPayload } from '../../Abstract/Payload/Implementations/DeletedPayload'
+import { DecryptedPayload } from '../../Abstract/Payload/Implementations/DecryptedPayload'
+import {
+  FullyFormedTransferPayload,
+  isDecryptedTransferPayload,
+  isDeletedTransferPayload,
+  isEncryptedTransferPayload,
+} from '../../Abstract/TransferPayload'
+import { PayloadSource } from '../../Abstract/Payload/Types/PayloadSource'
+import { ConditionalPayloadType } from './ConditionalPayloadType'
+
+export function CreatePayload<T extends FullyFormedTransferPayload>(
+  from: T,
+  source: PayloadSource,
+): ConditionalPayloadType<T> {
+  if (isDecryptedTransferPayload(from)) {
+    return new DecryptedPayload(from, source) as unknown as ConditionalPayloadType<T>
+  } else if (isEncryptedTransferPayload(from)) {
+    return new EncryptedPayload(from, source) as unknown as ConditionalPayloadType<T>
+  } else if (isDeletedTransferPayload(from)) {
+    return new DeletedPayload(from, source) as unknown as ConditionalPayloadType<T>
+  } else {
+    throw Error('Unhandled case in CreatePayload')
+  }
+}