From 2a586c984bd964c7cd65cd3f59ea8f69e496d654 Mon Sep 17 00:00:00 2001
From: tae <taeshindev@gmail.com>
Date: Mon, 4 May 2020 19:21:46 +0900
Subject: [PATCH] migrate reducers/themes to TypeScript (#23716)

Co-authored-by: tae <taeshindefv@gmailcom>
---
 packages/gatsby/src/redux/reducers/index.js  |  3 ++-
 packages/gatsby/src/redux/reducers/themes.js | 12 ------------
 packages/gatsby/src/redux/reducers/themes.ts | 17 +++++++++++++++++
 packages/gatsby/src/redux/types.ts           |  5 +++++
 4 files changed, 24 insertions(+), 13 deletions(-)
 delete mode 100644 packages/gatsby/src/redux/reducers/themes.js
 create mode 100644 packages/gatsby/src/redux/reducers/themes.ts

diff --git a/packages/gatsby/src/redux/reducers/index.js b/packages/gatsby/src/redux/reducers/index.js
index 1bc90fd0b9bbd..92319aeabc55b 100644
--- a/packages/gatsby/src/redux/reducers/index.js
+++ b/packages/gatsby/src/redux/reducers/index.js
@@ -4,6 +4,7 @@ import { redirectsReducer } from "./redirects"
 import { staticQueryComponentsReducer } from "./static-query-components"
 import { statusReducer } from "./status"
 import { webpackReducer } from "./webpack"
+import { themesReducer } from "./themes"
 import { webpackCompilationHashReducer } from "./webpack-compilation-hash"
 import { reducer as logReducer } from "gatsby-cli/lib/reporter/redux/reducer"
 
@@ -69,7 +70,7 @@ module.exports = {
   redirects: redirectsReducer,
   babelrc: require(`./babelrc`),
   schemaCustomization: require(`./schema-customization`),
-  themes: require(`./themes`),
+  themes: themesReducer,
   logs: logReducer,
   inferenceMetadata: require(`./inference-metadata`),
   pageDataStats: require(`./page-data-stats`),
diff --git a/packages/gatsby/src/redux/reducers/themes.js b/packages/gatsby/src/redux/reducers/themes.js
deleted file mode 100644
index 4f6e52a335f1b..0000000000000
--- a/packages/gatsby/src/redux/reducers/themes.js
+++ /dev/null
@@ -1,12 +0,0 @@
-module.exports = (state = {}, action) => {
-  switch (action.type) {
-    case `SET_RESOLVED_THEMES`:
-      return {
-        ...state,
-        themes: action.payload,
-      }
-
-    default:
-      return state
-  }
-}
diff --git a/packages/gatsby/src/redux/reducers/themes.ts b/packages/gatsby/src/redux/reducers/themes.ts
new file mode 100644
index 0000000000000..81a5124c64c2a
--- /dev/null
+++ b/packages/gatsby/src/redux/reducers/themes.ts
@@ -0,0 +1,17 @@
+import { IGatsbyState, ISetResolvedThemesAction } from "../types"
+
+export const themesReducer = (
+  state: IGatsbyState["themes"] = {},
+  action: ISetResolvedThemesAction
+): IGatsbyState["themes"] => {
+  switch (action.type) {
+    case `SET_RESOLVED_THEMES`:
+      return {
+        ...state,
+        themes: action.payload,
+      }
+
+    default:
+      return state
+  }
+}
diff --git a/packages/gatsby/src/redux/types.ts b/packages/gatsby/src/redux/types.ts
index 5b0c643d6d8d9..c17f5832b0650 100644
--- a/packages/gatsby/src/redux/types.ts
+++ b/packages/gatsby/src/redux/types.ts
@@ -380,6 +380,11 @@ export interface ICreateRedirectAction {
   payload: IRedirect
 }
 
+export interface ISetResolvedThemesAction {
+  type: `SET_RESOLVED_THEMES`
+  payload: IRedirect
+}
+
 export interface IDeleteCacheAction {
   type: `DELETE_CACHE`
 }