chore(gatsby) Convert get-value-at to typescript

packages/gatsby/src/db/loki/nodes-query.js

@@ -17,7 +17,7 @@ const {
   objectToDottedField,
   liftResolvedFields,
 } = require(`../common/query`)
-const { getValueAt } = require(`../../utils/get-value-at`)
+import { getValueAt } from "../../utils/get-value-at"
 const { runSiftOnNodes } = require(`../../redux/run-sift`)
 
 // Takes a raw graphql filter and converts it into a mongo-like args

packages/gatsby/src/redux/run-sift.js

@@ -3,7 +3,7 @@ const { default: sift } = require(`sift`)
 const _ = require(`lodash`)
 const { prepareRegex } = require(`../utils/prepare-regex`)
 const { makeRe } = require(`micromatch`)
-const { getValueAt } = require(`../utils/get-value-at`)
+import { getValueAt } from "../utils/get-value-at"
 const {
   toDottedFields,
   objectToDottedField,

packages/gatsby/src/schema/infer/is-file.js

@@ -3,7 +3,7 @@ const { slash } = require(`gatsby-core-utils`)
 const mime = require(`mime`)
 const isRelative = require(`is-relative`)
 const isRelativeUrl = require(`is-relative-url`)
-const { getValueAt } = require(`../../utils/get-value-at`)
+import { getValueAt } from "../../utils/get-value-at"
 
 const isFile = (nodeStore, fieldPath, relativePath) => {
   const filePath = getFilePath(nodeStore, fieldPath, relativePath)

packages/gatsby/src/schema/resolvers.js

@@ -2,7 +2,7 @@ const systemPath = require(`path`)
 const normalize = require(`normalize-path`)
 const _ = require(`lodash`)
 const { GraphQLList, getNullableType, getNamedType, Kind } = require(`graphql`)
-const { getValueAt } = require(`../utils/get-value-at`)
+import { getValueAt } from "../utils/get-value-at"
 
 const findMany = typeName => (source, args, context, info) =>
   context.nodeModel.runQuery(

packages/gatsby/src/utils/__tests__/get-value-at.js → packages/gatsby/src/utils/__tests__/get-value-at.ts

@@ -1,4 +1,4 @@
-const { getValueAt } = require(`../get-value-at`)
+import { getValueAt } from "../get-value-at"
 
 describe(`getValueAt util`, () => {
   it(`handles object properties`, () => {

packages/gatsby/src/utils/get-value-at.js → packages/gatsby/src/utils/get-value-at.ts

@@ -1,10 +1,10 @@
-const getValueAt = (obj, selector) => {
+export function getValueAt(obj: object, selector: string | string[]): any {
   const selectors =
     typeof selector === `string` ? selector.split(`.`) : selector
   return get(obj, selectors)
 }
 
-const get = (obj, selectors) => {
+function get(obj: object, selectors: string[]): any {
   if (Array.isArray(obj)) return getArray(obj, selectors)
   const [key, ...rest] = selectors
   const value = obj[key]
@@ -14,11 +14,10 @@ const get = (obj, selectors) => {
   return undefined
 }
 
-const getArray = (arr, selectors) =>
-  arr
+function getArray(arr: object[], selectors: string[]): any[] {
+  return arr
     .map(value =>
       Array.isArray(value) ? getArray(value, selectors) : get(value, selectors)
     )
     .filter(v => v !== undefined)
-
-module.exports = { getValueAt }
+}