From 368db0a9a7d32ca9ee0738189881b5164e577f70 Mon Sep 17 00:00:00 2001
From: Damien Senger <damien.senger@castoredc.com>
Date: Sat, 25 Apr 2020 13:51:12 +0200
Subject: [PATCH] chore(gatsby): migrate schema reducer to TypeScript

This commit implements the migration of the schema reducer to
TypeScript by adding the SET_SCHEMA action to the ActionsUnion and
by adding the basic types from the IGatsbyState.
---
 packages/gatsby/src/redux/reducers/index.js  |  3 ++-
 packages/gatsby/src/redux/reducers/schema.js |  8 --------
 packages/gatsby/src/redux/reducers/schema.ts | 14 ++++++++++++++
 packages/gatsby/src/redux/types.ts           |  6 ++++++
 4 files changed, 22 insertions(+), 9 deletions(-)
 delete mode 100644 packages/gatsby/src/redux/reducers/schema.js
 create mode 100644 packages/gatsby/src/redux/reducers/schema.ts

diff --git a/packages/gatsby/src/redux/reducers/index.js b/packages/gatsby/src/redux/reducers/index.js
index 8e00d7f40980f..421094284e795 100644
--- a/packages/gatsby/src/redux/reducers/index.js
+++ b/packages/gatsby/src/redux/reducers/index.js
@@ -1,6 +1,7 @@
 const reduxNodes = require(`./nodes`)
 const lokiNodes = require(`../../db/loki/nodes`).reducer
 import { redirectsReducer } from "./redirects"
+import { schemaReducer } from "./schema"
 import { staticQueryComponentsReducer } from "./static-query-components"
 import { statusReducer } from "./status"
 import { webpackReducer } from "./webpack"
@@ -56,7 +57,7 @@ module.exports = {
   flattenedPlugins: require(`./flattened-plugins`),
   config: require(`./config`),
   pages: require(`./pages`),
-  schema: require(`./schema`),
+  schema: schemaReducer,
   status: statusReducer,
   componentDataDependencies: require(`./component-data-dependencies`),
   components: require(`./components`),
diff --git a/packages/gatsby/src/redux/reducers/schema.js b/packages/gatsby/src/redux/reducers/schema.js
deleted file mode 100644
index 01fbacb86082e..0000000000000
--- a/packages/gatsby/src/redux/reducers/schema.js
+++ /dev/null
@@ -1,8 +0,0 @@
-module.exports = (state = {}, action) => {
-  switch (action.type) {
-    case `SET_SCHEMA`:
-      return action.payload
-    default:
-      return state
-  }
-}
diff --git a/packages/gatsby/src/redux/reducers/schema.ts b/packages/gatsby/src/redux/reducers/schema.ts
new file mode 100644
index 0000000000000..0c9d239746d7d
--- /dev/null
+++ b/packages/gatsby/src/redux/reducers/schema.ts
@@ -0,0 +1,14 @@
+import { ActionsUnion, IGatsbyState } from "../types"
+import { GraphQLSchema } from "graphql"
+
+export const schemaReducer = (
+  state: IGatsbyState["schema"] = new GraphQLSchema({ query: null }),
+  action: ActionsUnion
+): IGatsbyState["schema"] => {
+  switch (action.type) {
+    case `SET_SCHEMA`:
+      return action.payload
+    default:
+      return state
+  }
+}
diff --git a/packages/gatsby/src/redux/types.ts b/packages/gatsby/src/redux/types.ts
index 9c7bd02a82fbb..25a06d5a30833 100644
--- a/packages/gatsby/src/redux/types.ts
+++ b/packages/gatsby/src/redux/types.ts
@@ -226,6 +226,7 @@ export type ActionsUnion =
   | IReplaceWebpackConfigAction
   | ISetPluginStatusAction
   | ISetProgramStatusAction
+  | ISetSchemaAction
   | ISetWebpackCompilationHashAction
   | ISetWebpackConfigAction
   | IUpdatePluginsHashAction
@@ -411,3 +412,8 @@ export interface ISetWebpackConfigAction {
   type: `SET_WEBPACK_CONFIG`
   payload: Partial<IGatsbyState["webpack"]>
 }
+
+export interface ISetSchemaAction {
+  type: `SET_SCHEMA`
+  payload: IGatsbyState["schema"]
+}