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New: Refactored reactDataverse into a package

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/dist

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import path from 'path'
import {build} from 'esbuild'
const definedGlobals = {
global: 'window',
}
function createBundles(watch: boolean) {
const pathToPackage = path.join(__dirname, '../')
const esbuildConfig: Parameters<typeof build>[0] = {
entryPoints: [path.join(pathToPackage, 'src/index.ts')],
bundle: true,
sourcemap: true,
define: definedGlobals,
watch,
platform: 'neutral',
mainFields: ['browser', 'module', 'main'],
target: ['firefox57', 'chrome58'],
conditions: ['browser', 'node'],
}
build({
...esbuildConfig,
outfile: path.join(pathToPackage, 'dist/index.cjs'),
format: 'cjs',
})
build({
...esbuildConfig,
outfile: path.join(pathToPackage, 'dist/index.mjs'),
format: 'esm',
})
}
createBundles(false)

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{
}

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{
"name": "@theatre/dataverse-react",
"version": "1.0.0-dev.2",
"license": "Apache-2.0",
"author": {
"name": "Aria Minaei",
"email": "aria@theatrejs.com",
"url": "https://github.com/AriaMinaei"
},
"repository": {
"type": "git",
"url": "https://github.com/AriaMinaei/theatre",
"directory": "packages/dataverse-react"
},
"main": "dist/index.cjs",
"types": "dist/index.d.ts",
"module": "dist/index.mjs",
"exports": {
".": {
"require": "./dist/index.cjs",
"import": "./dist/index.mjs",
"default": "./dist/index.cjs",
"node": "./dist/index.cjs"
}
},
"files": [
"dist/**/*"
],
"scripts": {
"prepack": "yarn run build",
"typecheck": "yarn run build",
"build": "run-s build:ts build:js",
"build:ts": "tsc --build ./tsconfig.json",
"build:js": "node -r esbuild-register ./devEnv/build.ts"
},
"devDependencies": {
"@types/jest": "^26.0.23",
"@types/lodash-es": "^4.17.4",
"@types/node": "^15.6.2",
"@types/react": "^17.0.9",
"@types/react-dom": "^17.0.6",
"esbuild": "^0.12.5",
"esbuild-register": "^2.5.0",
"npm-run-all": "^4.1.5",
"typescript": "^4.3.2"
},
"dependencies": {
"lodash-es": "^4.17.21",
"queue-microtask": "^1.2.3"
},
"peerDependencies": {
"@theatre/dataverse": "*",
"raect-dom": "17.0.2",
"react": "17.0.2"
}
}

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import type {IDerivation} from '@theatre/dataverse'
import {Box} from '@theatre/dataverse'
import {prism, val} from '@theatre/dataverse'
import {findIndex} from 'lodash-es'
import queueMicrotask from 'queue-microtask'
import {
useCallback,
useEffect,
useLayoutEffect,
useMemo,
useRef,
useState,
} from 'react'
import {unstable_batchedUpdates} from 'react-dom'
type $IntentionalAny = any
type VoidFn = () => void
const logger = {log: console.log}
function useForceUpdate(debugLabel?: string) {
const [, setTick] = useState(0)
const update = useCallback(() => {
if (process.env.NODE_ENV !== 'production' && debugLabel)
logger.log(debugLabel, 'forceUpdate', {trace: new Error()})
setTick((tick) => tick + 1)
}, [])
return update
}
export function usePrism<T>(
fn: () => T,
deps: unknown[],
debugLabel?: string,
): T {
const fnAsCallback = useCallback(fn, deps)
const boxRef = useRef<Box<typeof fn>>(null as $IntentionalAny)
if (!boxRef.current) {
boxRef.current = new Box(fnAsCallback)
} else {
boxRef.current.set(fnAsCallback)
}
const derivation = useMemo(
() =>
prism(() => {
const fn = boxRef.current.derivation.getValue()
return fn()
}),
[],
)
return useDerivation(derivation, debugLabel)
}
export const useVal: typeof val = (p) => {
return usePrism(() => val(p), [p])
}
/**
* Each usePrism() call is assigned an `order`. Parents have a smaller
* order than their children, and so on.
*/
let lastOrder = 0
/**
* A sorted array of derivations that need to be refreshed. The derivations are sorted
* by their order, which means a parent derivation always gets priority to children
* and descendents. Ie. we refresh the derivations top to bottom.
*/
const queue: QueueItem[] = []
const setOfQueuedItems = new Set<QueueItem>()
type QueueItem = {
order: number
/**
* runUpdate() is the equivalent of a forceUpdate() call.
*/
runUpdate: VoidFn
debugLabel?: string
}
let microtaskIsQueued = false
const pushToQueue = (item: QueueItem) => {
_pushToQueue(item)
if (!microtaskIsQueued) {
microtaskIsQueued = true
queueMicrotask(() => {
while (queue.length > 0) {
unstable_batchedUpdates(() => {
for (const item of queue) {
item.runUpdate()
}
})
}
microtaskIsQueued = false
})
}
}
const _pushToQueue = (item: QueueItem) => {
if (setOfQueuedItems.has(item)) return
setOfQueuedItems.add(item)
if (queue.length === 0) {
queue.push(item)
} else {
const index = findIndex(
queue,
(existingItem) => existingItem.order >= item.order,
)
if (index === -1) {
queue.push(item)
} else {
const right = queue[index]
if (right.order > item.order) {
queue.splice(index, 0, item)
}
}
}
}
const removeFromQueue = (item: QueueItem) => {
if (!setOfQueuedItems.has(item)) return
setOfQueuedItems.delete(item)
const index = findIndex(queue, (o) => o === item)
queue.splice(index, 1)
}
/**
* @remarks
* It looks like this new implementation of useDerivation() manages to:
* 1. Not over-calculate the derivations
* 2. Render derivation in ancestor -> descendent order
* 3. Not set off React's concurrent mode alarms
*
* It works like an implementation of Dataverse's Ticker, except that it runs
* the side effects in an order where a component's derivation is guaranteed
* to run before any of its descendents' derivations.
*
* I'm happy with how little bookkeeping we ended up doing here.
*/
function useDerivation<T>(der: IDerivation<T>, debugLabel?: string): T {
const _forceUpdate = useForceUpdate(debugLabel)
const refs = useRef<{queueItem: QueueItem; unmounted: boolean}>(
undefined as $IntentionalAny,
)
if (!refs.current) {
lastOrder++
refs.current = {
queueItem: {
debugLabel,
order: lastOrder,
runUpdate: () => {
if (!refs.current.unmounted) {
_forceUpdate()
}
},
},
unmounted: false,
}
}
const queueUpdate = useCallback(() => {
pushToQueue(refs.current.queueItem)
}, [])
useLayoutEffect(() => {
const untap = der.changesWithoutValues().tap(() => {
queueUpdate()
})
if (lastValueRef.current !== der.getValue()) {
queueUpdate()
}
return untap
}, [der])
useLayoutEffect(() => {
return function onUnmount() {
refs.current.unmounted = true
removeFromQueue(refs.current.queueItem)
}
}, [])
const lastValueRef = useRef<T>(undefined as $IntentionalAny as T)
const queueItem = refs.current.queueItem
// we defer refreshing our derivation if:
const mustDefer =
// we are actually queued to refresh
setOfQueuedItems.has(queueItem) &&
// but it's not our turn yet
queue[0] !== refs.current.queueItem
if (!mustDefer) {
removeFromQueue(queueItem)
lastValueRef.current = der.getValue()
} else {
// if it's not our turn, we return the last cached value,
// which react will actually drop, because the microtask
// queue will make sure to forceUpdate() us before react
// flushes to DOM.
}
return lastValueRef.current
}
/**
* This makes sure the prism derivation remains hot as long as the
* component calling the hook is alive, but it does not
* return the value of the derivation, and it does not
* re-render the component if the value of the derivation changes.
*
* Use this hook if you plan to read a derivation in a
* useEffect() call, without the derivation causing your
* element to re-render.
*/
export function usePrismWithoutReRender<T>(
fn: () => T,
deps: unknown[],
): IDerivation<T> {
const derivation = useMemo(() => prism(fn), deps)
return useDerivationWithoutReRender(derivation)
}
/**
* This makes sure the derivation remains hot as long as the
* component calling the hook is alive, but it does not
* return the value of the derivation, and it does not
* re-render the component if the value of the derivation changes.
*/
export function useDerivationWithoutReRender<T>(
der: IDerivation<T>,
): IDerivation<T> {
useEffect(() => {
const untap = der.keepHot()
return () => {
untap()
}
}, [der])
return der
}

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{
"extends": "../../tsconfig.base.json",
"compilerOptions": {
"outDir": "dist",
"lib": ["ESNext", "DOM"],
"rootDir": "src",
"types": ["jest", "node"],
"emitDeclarationOnly": true,
"target": "es6",
"composite": true
},
"include": ["./src/**/*"],
"references": [{"path": "../dataverse"}]
}