move channel/platform functions to a new file

src/seed_tools/utils/serializers.ts

@@ -0,0 +1,20 @@
+// Copyright (c) 2024 The Brave Authors. All rights reserved.
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+export function channelToString(channel: string, isChromium: boolean): string {
+  if (isChromium) return channel;
+
+  switch (channel) {
+    case 'CANARY':
+      return 'NIGHTLY';
+    case 'STABLE':
+      return 'RELEASE';
+  }
+  return channel;
+}
+
+export function platformToString(platform: string): string {
+  return platform.replace(/^PLATFORM_/, '');
+}

src/seed_tools/utils/study_json_utils.ts

@@ -6,6 +6,7 @@
 import { promises as fs } from 'fs';
 import JSON5 from 'json5';
 import { Study } from '../../proto/generated/study';
+import { channelToString, platformToString } from './serializers';
 
 export interface Options {
   isChromium?: boolean;
@@ -50,7 +51,7 @@ export function parseStudies(
 ): Study[] {
   const jsonStudies = JSON5.parse(
     studyArrayString,
-    jsonStudyReviever.bind(null, options),
+    jsonStudyReviewer.bind(null, options),
   );
   if (!Array.isArray(jsonStudies)) {
     throw new Error('Root element must be an array');
@@ -86,29 +87,6 @@ export function stringifyStudies(studies: Study[], options?: Options): string {
   );
 }
 
-export function replaceChannels(
-  channels: string[] | undefined,
-  isChromium: boolean,
-): string[] | undefined {
-  if (isChromium) return channels;
-
-  return channels?.map((channel) => {
-    switch (channel) {
-      case 'CANARY':
-        return 'NIGHTLY';
-      case 'STABLE':
-        return 'RELEASE';
-    }
-    return channel;
-  });
-}
-
-export function replacePlatforms(
-  platforms: string[] | undefined,
-): string[] | undefined {
-  return platforms?.map((platform) => platform.replace(/^PLATFORM_/, ''));
-}
-
 function jsonStudyReplacer(
   options: Options | undefined,
   key: string,
@@ -120,17 +98,19 @@ function jsonStudyReplacer(
       return new Date(value * 1000).toISOString();
     }
     case 'channel': {
-      return replaceChannels(value, options?.isChromium === true);
+      return value.map((c: string) =>
+        channelToString(c, options?.isChromium === true),
+      );
     }
     case 'platform': {
-      return replacePlatforms(value);
+      return value.map((p: string) => platformToString(p));
     }
     default:
       return value;
   }
 }
 
-function jsonStudyReviever(
+function jsonStudyReviewer(
   options: Options | undefined,
   key: string,
   value: any,

src/web/app/study_model.ts

@@ -16,9 +16,9 @@ import {
   Study_Platform,
 } from '../../proto/generated/study';
 import {
-  replaceChannels,
-  replacePlatforms,
-} from '../../seed_tools/utils/study_json_utils';
+  channelToString,
+  platformToString,
+} from '../../seed_tools/utils/serializers';
 import { ExperimentModel } from './experiment_model';
 
 export class StudyModel {
@@ -62,19 +62,14 @@ export class StudyModel {
   }
 
   platforms(): string[] | undefined {
-    const string_platforms = this.filter()?.platform?.map(
-      (p) => Study_Platform[p],
+    return this.filter()?.platform?.map((p) =>
+      platformToString(Study_Platform[p]),
     );
-    return replacePlatforms(string_platforms);
   }
 
   channels(): string[] | undefined {
-    const string_channels = this.filter()?.channel?.map(
-      (c) => Study_Channel[c],
-    );
-    return replaceChannels(
-      string_channels,
-      this.seedType === SeedType.UPSTREAM,
+    return this.filter()?.channel?.map((c) =>
+      channelToString(Study_Channel[c], this.seedType === SeedType.UPSTREAM),
     );
   }