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feat: make watch$ strictNullCheck compatible (#34)

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* feat: make `watch$` strictNullCheck compatible

* chore: send initial value to subscribers

* let values emit when undefined

* fix: properly check if data can be processed

Co-authored-by: Lucy Cifferello <12953208+elvece@users.noreply.github.com>
This commit is contained in:
Alex Inkin
2022-06-19 22:19:00 +03:00
committed by GitHub
parent 8e7c893d48
commit e138b88e75
2 changed files with 34 additions and 28 deletions
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2
client/lib/json-patch-lib.ts
View File

@@ -75,7 +75,7 @@ function recursiveApply<T extends Record<string, T>> (data: T, path: readonly st
} }
function isObject (val: any): val is Record<string, unknown> { function isObject (val: any): val is Record<string, unknown> {
return typeof val === 'object' && !Array.isArray(val) && val !== null return typeof val === 'object' && val !== null
} }
function jsonPathToKeyArray (path: string): string[] { function jsonPathToKeyArray (path: string): string[] {

60
client/lib/store.ts
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@@ -1,5 +1,5 @@
import { DBCache, Dump, Http, Revision, Update } from './types' import { DBCache, Dump, Http, Revision, Update } from './types'
import { BehaviorSubject, Observable } from 'rxjs' import { BehaviorSubject, Observable, ReplaySubject } from 'rxjs'
import { applyOperation, getValueByPointer, Operation } from './json-patch-lib' import { applyOperation, getValueByPointer, Operation } from './json-patch-lib'
import BTree from 'sorted-btree' import BTree from 'sorted-btree'
@@ -11,10 +11,10 @@ export interface StashEntry {
export class Store<T extends { [key: string]: any }> { export class Store<T extends { [key: string]: any }> {
cache: DBCache<T> cache: DBCache<T>
sequence$: BehaviorSubject<number> sequence$: BehaviorSubject<number>
private watchedNodes: { [path: string]: BehaviorSubject<any> } = { } private watchedNodes: { [path: string]: ReplaySubject<any> } = {}
private stash = new BTree<number, StashEntry>() private stash = new BTree<number, StashEntry>()
constructor ( constructor(
private readonly http: Http<T>, private readonly http: Http<T>,
private readonly initialCache: DBCache<T>, private readonly initialCache: DBCache<T>,
) { ) {
@@ -22,24 +22,25 @@ export class Store<T extends { [key: string]: any }> {
this.sequence$ = new BehaviorSubject(initialCache.sequence) this.sequence$ = new BehaviorSubject(initialCache.sequence)
} }
watch$ (): Observable<T> watch$(): Observable<T>
watch$<P1 extends keyof T> (p1: P1): Observable<T[P1]> watch$<P1 extends keyof T>(p1: P1): Observable<NonNullable<T[P1]>>
watch$<P1 extends keyof T, P2 extends keyof T[P1]> (p1: P1, p2: P2): Observable<T[P1][P2]> watch$<P1 extends keyof T, P2 extends keyof NonNullable<T[P1]>>(p1: P1, p2: P2): Observable<NonNullable<NonNullable<T[P1]>[P2]>>
watch$<P1 extends keyof T, P2 extends keyof T[P1], P3 extends keyof T[P1][P2]> (p1: P1, p2: P2, p3: P3): Observable<T[P1][P2][P3]> watch$<P1 extends keyof T, P2 extends keyof NonNullable<T[P1]>, P3 extends keyof NonNullable<NonNullable<T[P1]>[P2]>>(p1: P1, p2: P2, p3: P3): Observable<NonNullable<NonNullable<NonNullable<T[P1]>[P2]>[P3]>>
watch$<P1 extends keyof T, P2 extends keyof T[P1], P3 extends keyof T[P1][P2], P4 extends keyof T[P1][P2][P3]> (p1: P1, p2: P2, p3: P3, p4: P4): Observable<T[P1][P2][P3][P4]> watch$<P1 extends keyof T, P2 extends keyof NonNullable<T[P1]>, P3 extends keyof NonNullable<NonNullable<T[P1]>[P2]>, P4 extends keyof NonNullable<NonNullable<NonNullable<T[P1]>[P2]>[P3]>>(p1: P1, p2: P2, p3: P3, p4: P4): Observable<NonNullable<NonNullable<NonNullable<NonNullable<T[P1]>[P2]>[P3]>[P4]>>
watch$<P1 extends keyof T, P2 extends keyof T[P1], P3 extends keyof T[P1][P2], P4 extends keyof T[P1][P2][P3], P5 extends keyof T[P1][P2][P3][P4]> (p1: P1, p2: P2, p3: P3, p4: P4, p5: P5): Observable<T[P1][P2][P3][P4][P5]> watch$<P1 extends keyof T, P2 extends keyof NonNullable<T[P1]>, P3 extends keyof NonNullable<NonNullable<T[P1]>[P2]>, P4 extends keyof NonNullable<NonNullable<NonNullable<T[P1]>[P2]>[P3]>, P5 extends keyof NonNullable<NonNullable<NonNullable<NonNullable<T[P1]>[P2]>[P3]>[P4]>>(p1: P1, p2: P2, p3: P3, p4: P4, p5: P5): Observable<NonNullable<NonNullable<NonNullable<NonNullable<NonNullable<T[P1]>[P2]>[P3]>[P4]>[P5]>>
watch$<P1 extends keyof T, P2 extends keyof T[P1], P3 extends keyof T[P1][P2], P4 extends keyof T[P1][P2][P3], P5 extends keyof T[P1][P2][P3][P4], P6 extends keyof T[P1][P2][P3][P4][P5]> (p1: P1, p2: P2, p3: P3, p4: P4, p5: P5, p6: P6): Observable<T[P1][P2][P3][P4][P5][P6]> watch$<P1 extends keyof T, P2 extends keyof NonNullable<T[P1]>, P3 extends keyof NonNullable<NonNullable<T[P1]>[P2]>, P4 extends keyof NonNullable<NonNullable<NonNullable<T[P1]>[P2]>[P3]>, P5 extends keyof NonNullable<NonNullable<NonNullable<NonNullable<T[P1]>[P2]>[P3]>[P4]>, P6 extends keyof NonNullable<NonNullable<NonNullable<NonNullable<NonNullable<T[P1]>[P2]>[P3]>[P4]>[P5]>>(p1: P1, p2: P2, p3: P3, p4: P4, p5: P5, p6: P6): Observable<NonNullable<NonNullable<NonNullable<NonNullable<NonNullable<NonNullable<T[P1]>[P2]>[P3]>[P4]>[P5]>[P6]>>
watch$ (...args: (string | number)[]): Observable<any> { watch$(...args: (string | number)[]): Observable<any> {
const path = `/${args.join('/')}` const path = `/${args.join('/')}`
if (!this.watchedNodes[path]) { if (!this.watchedNodes[path]) {
this.watchedNodes[path] = new BehaviorSubject(getValueByPointer(this.cache.data, path)) this.watchedNodes[path] = new ReplaySubject(1)
this.updateValue(path)
} }
return this.watchedNodes[path].asObservable() return this.watchedNodes[path].asObservable()
} }
update (update: Update<T>): void { update(update: Update<T>): void {
if (this.isRevision(update)) { if (this.isRevision(update)) {
// if old or known, return // if old or known, return
if (update.id <= this.cache.sequence || this.stash.get(update.id)) return if (update.id <= this.cache.sequence || this.stash.get(update.id)) return
this.handleRevision(update) this.handleRevision(update)
} else { } else {
@@ -47,18 +48,24 @@ export class Store<T extends { [key: string]: any }> {
} }
} }
reset (): void { reset(): void {
Object.values(this.watchedNodes).forEach(node => node.complete()) Object.values(this.watchedNodes).forEach(node => node.complete())
this.watchedNodes = { } this.watchedNodes = {}
this.stash.clear() this.stash.clear()
this.sequence$.next(0) this.sequence$.next(0)
this.cache = { this.cache = {
sequence: 0, sequence: 0,
data: { } as any, data: {} as any,
} }
} }
private handleRevision (revision: Revision): void { private updateValue(path: string): void {
const value = getValueByPointer(this.cache.data, path)
this.watchedNodes[path].next(value)
}
private handleRevision(revision: Revision): void {
// stash the revision // stash the revision
this.stash.set(revision.id, { revision, undo: [] }) this.stash.set(revision.id, { revision, undo: [] })
@@ -70,7 +77,7 @@ export class Store<T extends { [key: string]: any }> {
this.processStashed(revision.id) this.processStashed(revision.id)
} }
private handleDump ({ value, id }: Dump<T>): void { private handleDump({ value, id }: Dump<T>): void {
this.cache.data = { ...value } this.cache.data = { ...value }
this.stash.deleteRange(this.cache.sequence, id, false) this.stash.deleteRange(this.cache.sequence, id, false)
this.updateWatchedNodes('') this.updateWatchedNodes('')
@@ -78,12 +85,12 @@ export class Store<T extends { [key: string]: any }> {
this.processStashed(id + 1) this.processStashed(id + 1)
} }
private processStashed (id: number): void { private processStashed(id: number): void {
this.undoRevisions(id) this.undoRevisions(id)
this.applyRevisions(id) this.applyRevisions(id)
} }
private undoRevisions (id: number): void { private undoRevisions(id: number): void {
let stashEntry = this.stash.get(this.stash.maxKey() as number) let stashEntry = this.stash.get(this.stash.maxKey() as number)
while (stashEntry && stashEntry.revision.id > id) { while (stashEntry && stashEntry.revision.id > id) {
@@ -92,7 +99,7 @@ export class Store<T extends { [key: string]: any }> {
} }
} }
private applyRevisions (id: number): void { private applyRevisions(id: number): void {
let revision = this.stash.get(id)?.revision let revision = this.stash.get(id)?.revision
while (revision) { while (revision) {
let undo: Operation<unknown>[] = [] let undo: Operation<unknown>[] = []
@@ -129,7 +136,7 @@ export class Store<T extends { [key: string]: any }> {
this.stash.deleteRange(0, this.cache.sequence, false) this.stash.deleteRange(0, this.cache.sequence, false)
} }
private updateWatchedNodes (revisionPath: string) { private updateWatchedNodes(revisionPath: string) {
const kill = (path: string) => { const kill = (path: string) => {
this.watchedNodes[path].complete() this.watchedNodes[path].complete()
delete this.watchedNodes[path] delete this.watchedNodes[path]
@@ -139,18 +146,17 @@ export class Store<T extends { [key: string]: any }> {
if (this.watchedNodes[path].observers.length === 0) return kill(path) if (this.watchedNodes[path].observers.length === 0) return kill(path)
if (path.includes(revisionPath) || revisionPath.includes(path)) { if (path.includes(revisionPath) || revisionPath.includes(path)) {
const val = getValueByPointer(this.cache.data, path) this.updateValue(path)
this.watchedNodes[path].next(val)
} }
}) })
} }
private updateSequence (sequence: number): void { private updateSequence(sequence: number): void {
this.cache.sequence = sequence this.cache.sequence = sequence
this.sequence$.next(sequence) this.sequence$.next(sequence)
} }
private isRevision (update: Update<T>): update is Revision { private isRevision(update: Update<T>): update is Revision {
return 'patch' in update return 'patch' in update
} }
} }