From 21b09e25ba9c430389d8c61e674c531757e6f2ae Mon Sep 17 00:00:00 2001
From: Robert <bobert.mushky@gmail.com>
Date: Tue, 26 Oct 2021 13:51:42 -0700
Subject: [PATCH] separate compression algorithms to avoid circular dependency

---
 packages/grpc-js/src/channel-options.ts       |  4 +++-
 .../grpc-js/src/compression-algorithms.ts     | 22 +++++++++++++++++++
 packages/grpc-js/src/compression-filter.ts    |  7 +-----
 packages/grpc-js/src/index.ts                 |  2 +-
 4 files changed, 27 insertions(+), 8 deletions(-)
 create mode 100644 packages/grpc-js/src/compression-algorithms.ts

diff --git a/packages/grpc-js/src/channel-options.ts b/packages/grpc-js/src/channel-options.ts
index f0b37d7a..b54ae4ed 100644
--- a/packages/grpc-js/src/channel-options.ts
+++ b/packages/grpc-js/src/channel-options.ts
@@ -15,6 +15,8 @@
  *
  */
 
+import { CompressionAlgorithms } from './compression-algorithms';
+
 /**
  * An interface that contains options used when initializing a Channel instance.
  */
@@ -36,7 +38,7 @@ export interface ChannelOptions {
   'grpc.enable_http_proxy'?: number;
   'grpc.http_connect_target'?: string;
   'grpc.http_connect_creds'?: string;
-  'grpc.default_compression_algorithm'?: number;
+  'grpc.default_compression_algorithm'?: keyof typeof CompressionAlgorithms;
   'grpc-node.max_session_memory'?: number;
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
   [key: string]: any;
diff --git a/packages/grpc-js/src/compression-algorithms.ts b/packages/grpc-js/src/compression-algorithms.ts
new file mode 100644
index 00000000..8ec283cf
--- /dev/null
+++ b/packages/grpc-js/src/compression-algorithms.ts
@@ -0,0 +1,22 @@
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+export const CompressionAlgorithms = {
+  0: 'identity',
+  1: 'deflate',
+  2: 'gzip'
+} as const;
diff --git a/packages/grpc-js/src/compression-filter.ts b/packages/grpc-js/src/compression-filter.ts
index ae507d33..69fcf48d 100644
--- a/packages/grpc-js/src/compression-filter.ts
+++ b/packages/grpc-js/src/compression-filter.ts
@@ -19,16 +19,11 @@ import * as zlib from 'zlib';
 
 import { Call, WriteObject, WriteFlags } from './call-stream';
 import { Channel } from './channel';
+import { CompressionAlgorithms } from './compression-algorithms';
 import { BaseFilter, Filter, FilterFactory } from './filter';
 import { Metadata, MetadataValue } from './metadata';
 import { ChannelOptions } from './channel-options';
 
-export const CompressionAlgorithms = {
-  0: 'identity',
-  1: 'deflate',
-  2: 'gzip'
-} as const;
-
 const CompressionAlgorithKeys = new Set(Object.keys(CompressionAlgorithms));
 
 const isCompressionAlgorithmKey = (key: number | undefined): key is keyof typeof CompressionAlgorithms => {
diff --git a/packages/grpc-js/src/index.ts b/packages/grpc-js/src/index.ts
index 7e1ed7a5..f34c19a1 100644
--- a/packages/grpc-js/src/index.ts
+++ b/packages/grpc-js/src/index.ts
@@ -25,7 +25,7 @@ import {
 import { CallCredentials, OAuth2Client } from './call-credentials';
 import { Deadline, StatusObject } from './call-stream';
 import { Channel, ChannelImplementation } from './channel';
-import { CompressionAlgorithms } from './compression-filter';
+import { CompressionAlgorithms } from './compression-algorithms';
 import { ConnectivityState } from './connectivity-state';
 import { ChannelCredentials } from './channel-credentials';
 import {