[form-builder] Move pathUtils to util package

packages/@sanity/form-builder/package.json

@@ -36,6 +36,7 @@
     "@sanity/imagetool": "0.140.0",
     "@sanity/mutator": "0.140.0",
     "@sanity/schema": "0.140.0",
+    "@sanity/util": "0.140.0",
     "attr-accept": "^1.1.0",
     "canvas-to-blob": "^0.0.0",
     "classnames": "^2.2.5",

packages/@sanity/form-builder/src/FormBuilderInput.js

@@ -4,7 +4,7 @@ import React from 'react'
 import type {Path} from './typedefs/path'
 import PatchEvent from './PatchEvent'
 import generateHelpUrl from '@sanity/generate-help-url'
-import * as PathUtils from './utils/pathUtils'
+import * as PathUtils from '@sanity/util/paths'
 import type {Type} from './typedefs'
 
 type Props = {

packages/@sanity/form-builder/src/inputs/ArrayInput/ArrayInput.js

@@ -7,7 +7,7 @@ import type {Marker, Type} from '../../typedefs'
 import type {Path} from '../../typedefs/path'
 import type {Subscription} from '../../typedefs/observable'
 import {resolveTypeName} from '../../utils/resolveTypeName'
-import {FOCUS_TERMINATOR, startsWith} from '../../utils/pathUtils'
+import {FOCUS_TERMINATOR, startsWith} from '@sanity/util/paths'
 import UploadTargetFieldset from '../../utils/UploadTargetFieldset'
 import {insert, PatchEvent, set, setIfMissing, unset} from '../../PatchEvent'
 import styles from './styles/ArrayInput.css'
@@ -296,9 +296,7 @@ export default class ArrayInput extends React.Component<Props, State> {
             Some items in this list are missing their keys. We need to fix this before the list can
             be edited.
             <div className={styles.fixMissingKeysButtonWrapper}>
-              <Button onClick={this.handleFixMissingKeys}>
-                Fix missing keys
-              </Button>
+              <Button onClick={this.handleFixMissingKeys}>Fix missing keys</Button>
             </div>
             <Details title={<b>Why is this happening?</b>}>
               This usually happens when items are created through the API client from outside the

packages/@sanity/form-builder/src/inputs/ArrayInput/ItemValue.js

@@ -22,7 +22,7 @@ import Preview from '../../Preview'
 import {resolveTypeName} from '../../utils/resolveTypeName'
 import type {Path} from '../../typedefs/path'
 import type {Marker, Type} from '../../typedefs'
-import * as PathUtils from '../../utils/pathUtils'
+import * as PathUtils from '@sanity/util/paths'
 import ConfirmButton from './ConfirmButton'
 import styles from './styles/ItemValue.css'
 import type {ArrayType, ItemValue} from './typedefs'

packages/@sanity/form-builder/src/inputs/ArrayOfPrimitivesInput/ArrayOfPrimitivesInput.js

@@ -6,7 +6,7 @@ import {Item as SortableItem, List as SortableList} from 'part:@sanity/component
 import ArrayFunctions from 'part:@sanity/form-builder/input/array/functions'
 import Fieldset from 'part:@sanity/components/fieldsets/default'
 import {PatchEvent, set, unset} from '../../PatchEvent'
-import {startsWith} from '../../utils/pathUtils'
+import {startsWith} from '@sanity/util/paths'
 import {resolveTypeName} from '../../utils/resolveTypeName'
 import type {Path} from '../../typedefs/path'
 import type {Type, Marker} from '../../typedefs'

packages/@sanity/form-builder/src/inputs/BlockEditor/Toolbar/AnnotationButtons.js

@@ -7,7 +7,7 @@ import LinkIcon from 'part:@sanity/base/link-icon'
 import SanityLogoIcon from 'part:@sanity/base/sanity-logo-icon'
 import ToggleButton from 'part:@sanity/components/toggles/button'
 import type {BlockContentFeature, BlockContentFeatures, Path, SlateEditor} from '../typeDefs'
-import {FOCUS_TERMINATOR} from '../../../utils/pathUtils'
+import {FOCUS_TERMINATOR} from '@sanity/util/paths'
 import CustomIcon from './CustomIcon'
 import ToolbarClickAction from './ToolbarClickAction'
 

packages/@sanity/form-builder/src/inputs/BlockEditor/Toolbar/InsertMenu.js

@@ -6,7 +6,7 @@ import BlockObjectIcon from 'part:@sanity/base/block-object-icon'
 import InlineObjectIcon from 'part:@sanity/base/inline-object-icon'
 
 import type {Type, SlateValue, SlateEditor, Path} from '../typeDefs'
-import {FOCUS_TERMINATOR} from '../../../utils/pathUtils'
+import {FOCUS_TERMINATOR} from '@sanity/util/paths'
 import styles from './styles/InsertMenu.css'
 
 type Props = {

packages/@sanity/form-builder/src/inputs/BlockEditor/nodes/BlockObject.js

@@ -28,7 +28,7 @@ import type {
 } from '../typeDefs'
 
 import {PatchEvent} from '../../../PatchEvent'
-import {FOCUS_TERMINATOR} from '../../../utils/pathUtils'
+import {FOCUS_TERMINATOR} from '@sanity/util/paths'
 import {resolveTypeName} from '../../../utils/resolveTypeName'
 
 import InvalidValue from '../../InvalidValueInput'

packages/@sanity/form-builder/src/inputs/BlockEditor/nodes/InlineObject.js

@@ -20,7 +20,7 @@ import type {
 
 import {resolveTypeName} from '../../../utils/resolveTypeName'
 import {PatchEvent} from '../../../PatchEvent'
-import {FOCUS_TERMINATOR} from '../../../utils/pathUtils'
+import {FOCUS_TERMINATOR} from '@sanity/util/paths'
 
 import InvalidValue from '../../InvalidValueInput'
 import Preview from '../../../Preview'

packages/@sanity/form-builder/src/inputs/BlockEditor/nodes/Span.js

@@ -3,7 +3,7 @@
 import type {Node} from 'react'
 import React from 'react'
 import type {BlockContentFeatures, Type, Marker, Path, SlateEditor} from '../typeDefs'
-import {FOCUS_TERMINATOR} from '../../../utils/pathUtils'
+import {FOCUS_TERMINATOR} from '@sanity/util/paths'
 import styles from './styles/Span.css'
 import {Inline} from 'slate'
 

packages/@sanity/util/.babelrc.js

@@ -1,3 +1,4 @@
 module.exports = {
-  extends: '../../../.babelrc.js'
+  extends: '../../../.babelrc.js',
+  presets: ['@babel/preset-flow']
 }

packages/@sanity/util/.flowconfig

@@ -0,0 +1,7 @@
+[include]
+./src
+../../../
+[libs]
+defs
+[ignore]
+.*/examples/.*

packages/@sanity/util/package.json

@@ -38,6 +38,7 @@
     "resolve-from": "^4.0.0"
   },
   "devDependencies": {
+    "@babel/preset-flow": "^7.0.0",
     "jest": "^23.6.0",
     "rimraf": "^2.6.2"
   }

packages/@sanity/util/paths.js

@@ -0,0 +1 @@
+module.exports = require('./lib/pathUtils')

packages/@sanity/form-builder/src/utils/pathUtils.js → packages/@sanity/util/src/pathUtils.js

@@ -1,15 +1,57 @@
+/* eslint-disable max-depth */
 // @flow
 import type {Path, PathSegment} from '../typedefs/path'
 
+const rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g
+const reKeySegment = /_key\s*==\s*['"](.*)['"]/
+
+export const FOCUS_TERMINATOR = '$'
+
+// eslint-disable-next-line complexity
+export function get(obj: mixed, path: Path | string, defaultVal: mixed) {
+  const select = typeof path === 'string' ? fromString(path) : path
+  if (!Array.isArray(select)) {
+    throw new Error('Path must be an array or a string')
+  }
+
+  let acc = obj
+  for (let i = 0; i < select.length; i++) {
+    const segment = select[i]
+    if (isIndexSegment(segment)) {
+      if (!Array.isArray(acc)) {
+        return defaultVal
+      }
+
+      acc = acc[segment]
+    }
+
+    if (isKeySegment(segment)) {
+      if (!Array.isArray(acc)) {
+        return defaultVal
+      }
+
+      acc = acc.find(item => item._key === segment._key)
+    }
+
+    if (typeof segment === 'string') {
+      acc = typeof acc === 'object' && acc !== null ? acc[segment] : undefined
+    }
+
+    if (typeof acc === 'undefined') {
+      return defaultVal
+    }
+  }
+
+  return acc
+}
+
 export function isEqual(path: Path, otherPath: Path) {
   return (
     path.length === otherPath.length &&
     path.every((segment, i) => isSegmentEqual(segment, otherPath[i]))
   )
 }
 
-export const FOCUS_TERMINATOR = '$'
-
 export function isSegmentEqual(pathSegment: PathSegment, otherPathSegment: PathSegment) {
   const pathSegmentType = typeof pathSegment
   const otherPathSegmentType = typeof otherPathSegment
@@ -56,7 +98,7 @@ export function trimLeft(prefix: Path, path: Path): Path {
   return trimLeft(prefixTail, pathTail)
 }
 
-export function trimRight(suffix, path) {
+export function trimRight(suffix: Path, path: Path): Path {
   const sufLen = suffix.length
   const pathLen = path.length
   if (sufLen === 0 || pathLen === 0) {
@@ -75,7 +117,11 @@ export function trimRight(suffix, path) {
   return path.slice(0, pathLen - i)
 }
 
-export function toString(path) {
+export function toString(path: Path): string {
+  if (!Array.isArray(path)) {
+    throw new Error('Path is not an array')
+  }
+
   return path.reduce((target, segment, i) => {
     const segmentType = typeof segment
     if (segmentType === 'number') {
@@ -94,3 +140,49 @@ export function toString(path) {
     throw new Error(`Unsupported path segment \`${JSON.stringify(segment)}\``)
   }, '')
 }
+
+export function fromString(path: string): Path {
+  if (typeof path !== 'string') {
+    throw new Error('Path is not a string')
+  }
+
+  const segments = path.match(rePropName)
+  if (!segments) {
+    throw new Error('Invalid path string')
+  }
+
+  return segments.map(normalizePathSegment)
+}
+
+function normalizePathSegment(segment: string): PathSegment {
+  if (isIndexSegment(segment)) {
+    return normalizeIndexSegment(segment)
+  }
+
+  if (isKeySegment(segment)) {
+    return normalizeKeySegment(segment)
+  }
+
+  return segment
+}
+
+function normalizeIndexSegment(segment: string): PathSegment {
+  return Number(segment.replace(/[^\d]/g, ''))
+}
+
+function normalizeKeySegment(segment: string): PathSegment {
+  const segments = segment.match(reKeySegment)
+  return {_key: segments[1]}
+}
+
+function isIndexSegment(segment: string | number): boolean {
+  return typeof segment === 'number' || /^\[\d+\]$/.test(segment)
+}
+
+function isKeySegment(segment: PathSegment): boolean {
+  if (typeof segment === 'string') {
+    return reKeySegment.test(segment.trim())
+  }
+
+  return segment && segment._key
+}

packages/@sanity/util/src/typedefs/path.js

@@ -0,0 +1,7 @@
+type KeyedSegment = {
+  _key: string
+}
+
+export type PathSegment = string | number | KeyedSegment
+
+export type Path = Array<PathSegment>