perf(core): memoize prepareFormState (#7498)

* perf(core): memoize prepareFormState

* refactor(core): update root form state options

* fix(core): fix memoization bugs

* test(core): finish tests for every form option

* fix(core): fix stale `fieldGroupState` memo result

* refactor(core): return named function for readability

* docs(core): add JSDoc for `getId`

* refactor(core): mark sub-functions of `PrepareFormState` as internal

* fix: don't use symbols in weakmaps for firefox compat

packages/sanity/playwright-ct/tests/formBuilder/utils/TestForm.tsx

@@ -157,7 +157,8 @@ export function TestForm(props: TestFormProps) {
     validateStaticDocument(document, workspace, (result) => setValidation(result))
   }, [document, workspace])
 
-  const formState = useFormState(schemaType, {
+  const formState = useFormState({
+    schemaType,
     focusPath,
     collapsedPaths,
     collapsedFieldSets,
@@ -166,7 +167,7 @@ export function TestForm(props: TestFormProps) {
     openPath,
     presence: presenceFromProps,
     validation,
-    value: document,
+    documentValue: document,
   })
 
   const formStateRef = useRef(formState)

packages/sanity/src/core/form/store/__tests__/collapsible.test.ts

@@ -1,9 +1,9 @@
-import {describe, expect, it, test} from '@jest/globals'
+import {beforeEach, describe, expect, it, test} from '@jest/globals'
 import {Schema} from '@sanity/schema'
 import {type ObjectSchemaType, type Path} from '@sanity/types'
 
 import {pathToString} from '../../../field'
-import {prepareFormState} from '../formState'
+import {createPrepareFormState, type PrepareFormState} from '../formState'
 import {type FieldMember, type ObjectFormNode} from '../types'
 import {isObjectFormNode} from '../types/asserters'
 import {DEFAULT_PROPS} from './shared'
@@ -81,6 +81,12 @@ function getBookType(fieldOptions: {
   }).get('book')
 }
 
+let prepareFormState!: PrepareFormState
+
+beforeEach(() => {
+  prepareFormState = createPrepareFormState()
+})
+
 test("doesn't make primitive fields collapsed even if they are configured to be", () => {
   // Note: the schema validation should possibly enforce this
   // Note2: We might want to support making all kinds of fields collapsible, even primitive fields
@@ -93,7 +99,7 @@ test("doesn't make primitive fields collapsed even if they are configured to be"
   const result = prepareFormState({
     ...DEFAULT_PROPS,
     schemaType: bookType,
-    document: {_id: 'foo', _type: 'book'},
+    documentValue: {_id: 'foo', _type: 'book'},
   })
 
   expect(result).not.toBe(null)
@@ -121,7 +127,7 @@ describe('collapsible object fields', () => {
     const result = prepareFormState({
       ...DEFAULT_PROPS,
       schemaType: bookType,
-      document: {_id: 'foo', _type: 'book'},
+      documentValue: {_id: 'foo', _type: 'book'},
     })
 
     expect(result).not.toBe(null)
@@ -141,7 +147,7 @@ describe('collapsible object fields', () => {
     const result = prepareFormState({
       ...DEFAULT_PROPS,
       schemaType: bookType,
-      document: {_id: 'foo', _type: 'book'},
+      documentValue: {_id: 'foo', _type: 'book'},
     })
 
     expect(result).not.toBe(null)
@@ -160,7 +166,7 @@ describe('collapsible object fields', () => {
     const result = prepareFormState({
       ...DEFAULT_PROPS,
       schemaType: bookType,
-      document: {_id: 'foo', _type: 'book'},
+      value: {_id: 'foo', _type: 'book'},
     })
 
     expect(result).not.toBe(null)
@@ -184,7 +190,7 @@ describe('collapsible object fields', () => {
     const result = prepareFormState({
       ...DEFAULT_PROPS,
       schemaType: bookType,
-      document: {_id: 'foo', _type: 'book'},
+      documentValue: {_id: 'foo', _type: 'book'},
     })
 
     expect(result).not.toBe(null)

packages/sanity/src/core/form/store/__tests__/equality.test.ts

@@ -1,8 +1,8 @@
-import {expect, test} from '@jest/globals'
+import {beforeEach, expect, test} from '@jest/globals'
 import {Schema} from '@sanity/schema'
 import {type ConditionalProperty} from '@sanity/types'
 
-import {prepareFormState} from '../formState'
+import {createPrepareFormState, type PrepareFormState} from '../formState'
 import {DEFAULT_PROPS} from './shared'
 
 function getBookType(properties: {
@@ -73,20 +73,26 @@ function getBookType(properties: {
   }).get('book')
 }
 
+let prepareFormState!: PrepareFormState
+
+beforeEach(() => {
+  prepareFormState = createPrepareFormState()
+})
+
 test('it doesnt return new object equalities given the same input', () => {
-  const document = {_id: 'test', _type: 'foo'}
+  const documentValue = {_id: 'test', _type: 'foo'}
   const bookType = getBookType({})
 
   const state1 = prepareFormState({
     ...DEFAULT_PROPS,
     schemaType: bookType,
-    document,
+    documentValue,
   })
 
   const state2 = prepareFormState({
     ...DEFAULT_PROPS,
     schemaType: bookType,
-    document,
+    documentValue,
   })
   expect(state1).not.toBe(null)
   expect(state2).not.toBe(null)