DbRemoteDocumentCollectionIndexKey added

Author: dconeybe

packages/firestore/src/local/indexeddb_remote_document_cache.ts

@@ -39,7 +39,8 @@ import { dbDocumentSize } from './indexeddb_mutation_batch_impl';
 import {
   DbRemoteDocument,
   DbRemoteDocumentType,
-  DbRemoteDocumentGlobal
+  DbRemoteDocumentGlobal,
+  DbRemoteDocumentCollectionIndexKey
 } from './indexeddb_schema';
 import {
   DbRemoteDocumentCollectionGroupIndex,
@@ -289,7 +290,7 @@ class IndexedDbRemoteDocumentCacheImpl implements IndexedDbRemoteDocumentCache {
     context?: QueryContext
   ): PersistencePromise<MutableDocumentMap> {
     const collection = query.path;
-    const startKey = [
+    const startKey: DbRemoteDocumentCollectionIndexKey = [
       DbRemoteDocumentType.FoundDocument,
       collection.popLast().toArray(),
       collection.lastSegment(),
@@ -298,7 +299,7 @@ class IndexedDbRemoteDocumentCacheImpl implements IndexedDbRemoteDocumentCache {
         ? ''
         : offset.documentKey.path.lastSegment()
     ];
-    const endKey = [
+    const endKey: DbRemoteDocumentCollectionIndexKey = [
       DbRemoteDocumentType.FoundDocument,
       collection.popLast().toArray(),
       collection.lastSegment(),

packages/firestore/src/local/indexeddb_schema.ts

@@ -272,6 +272,17 @@ export interface DbRemoteDocument {
   documentType: DbRemoteDocumentType;
 }
 
+/**
+ * A key in the `DbRemoteDocumentCollectionIndex` index.
+ */
+export type DbRemoteDocumentCollectionIndexKey = [
+  /** document type */ DbRemoteDocumentType,
+  /** path to collection */ string[],
+  /** collection group */ string,
+  /** read time */ DbTimestampKey,
+  /** document ID */ string
+];
+
 /**
  * Contains a single entry that has metadata about the remote document cache.
  */