feat: add models package

packages/models/src/Domain/Runtime/Index/ItemDelta.ts

@@ -0,0 +1,24 @@
+import { ItemContent } from '../../Abstract/Content/ItemContent'
+import { DecryptedItemInterface, DeletedItemInterface, EncryptedItemInterface } from '../../Abstract/Item'
+import { AnyItemInterface } from '../../Abstract/Item/Interfaces/UnionTypes'
+
+export interface ItemDelta<C extends ItemContent = ItemContent> {
+  changed: AnyItemInterface[]
+  inserted: AnyItemInterface[]
+  /** Items that were deleted and finished sync */
+  discarded: DeletedItemInterface[]
+  /** Items which have encrypted overwrite protection enabled */
+  ignored: EncryptedItemInterface[]
+  /** Items which were previously error decrypting which have now been successfully decrypted */
+  unerrored: DecryptedItemInterface<C>[]
+}
+
+export function CreateItemDelta(partial: Partial<ItemDelta>): ItemDelta {
+  return {
+    changed: partial.changed || [],
+    inserted: partial.inserted || [],
+    discarded: partial.discarded || [],
+    ignored: partial.ignored || [],
+    unerrored: partial.unerrored || [],
+  }
+}

packages/models/src/Domain/Runtime/Index/SNIndex.ts

@@ -0,0 +1,5 @@
+import { ItemDelta } from './ItemDelta'
+
+export interface SNIndex {
+  onChange(delta: ItemDelta): void
+}