implement new FunctionExpressions as standalone functions

Author: MarkDuckworth

packages/firestore/lite/pipelines/pipelines.ts

@@ -137,7 +137,6 @@ export {
   descending,
   ExprWithAlias,
   Field,
-  Fields,
   Constant,
   FirestoreFunction,
   Add,

packages/firestore/src/api/pipeline_impl.ts

@@ -51,14 +51,17 @@ export function pipeline(
 ): PipelineSource<Pipeline> | Pipeline {
   if (firestoreOrQuery instanceof Firestore) {
     const firestore = firestoreOrQuery;
-    return new PipelineSource<Pipeline>((stages: Stage[]) => {
-      return new Pipeline(
-        firestore,
-        newUserDataReader(firestore),
-        new ExpUserDataWriter(firestore),
-        stages
-      );
-    });
+    return new PipelineSource<Pipeline>(
+      firestore._databaseId,
+      (stages: Stage[]) => {
+        return new Pipeline(
+          firestore,
+          newUserDataReader(firestore),
+          new ExpUserDataWriter(firestore),
+          stages
+        );
+      }
+    );
   } else {
     const query = firestoreOrQuery;
     const db = cast<Firestore>(query.firestore, Firestore);

packages/firestore/src/api_pipelines.ts

@@ -107,10 +107,61 @@ export {
   genericFunction,
   ascending,
   descending,
+  countif,
+  bitAnd,
+  bitOr,
+  bitXor,
+  bitNot,
+  bitLeftShift,
+  bitRightShift,
+  rand,
+  array,
+  arrayOffset,
+  currentContext,
+  isError,
+  ifError,
+  isAbsent,
+  isNull,
+  isNotNull,
+  isNotNan,
+  map,
+  mapRemove,
+  mapMerge,
+  parent,
+  collectionId,
+  documentIdFunction,
+  key,
+  substr,
+  manhattanDistance,
+  Countif,
+  BitAnd,
+  BitOr,
+  BitXor,
+  BitNot,
+  BitLeftShift,
+  BitRightShift,
+  Rand,
+  ArrayFunction,
+  ArrayOffset,
+  CurrentContext,
+  IsError,
+  IfError,
+  IsAbsent,
+  IsNull,
+  IsNotNull,
+  IsNotNan,
+  MapFunction,
+  MapRemove,
+  MapMerge,
+  Parent,
+  CollectionId,
+  DocumentId,
+  Key,
+  Substr,
+  ManhattanDistance,
   Expr,
   ExprWithAlias,
   Field,
-  Fields,
   Constant,
   FirestoreFunction,
   Add,