chore: add prettier and reformat lib

client/.prettierrc

@@ -0,0 +1,6 @@
+{
+  "singleQuote": true,
+  "semi": false,
+  "arrowParens": "avoid",
+  "trailingComma": "all"
+}

client/lib/json-patch-lib.ts

@@ -18,9 +18,15 @@ export interface ReplaceOperation<T> extends BaseOperation {
   value: T
 }
 
-export type Operation<T> = AddOperation<T> | RemoveOperation | ReplaceOperation<T>
+export type Operation<T> =
+  | AddOperation<T>
+  | RemoveOperation
+  | ReplaceOperation<T>
 
-export function getValueByPointer<T extends Record<string, T>> (data: T, pointer: string): any {
+export function getValueByPointer<T extends Record<string, T>>(
+  data: T,
+  pointer: string,
+): any {
   if (pointer === '/') return data
 
   try {
@@ -30,37 +36,38 @@ export function getValueByPointer<T extends Record<string, T>> (data: T, pointer
   }
 }
 
-export function applyOperation<T> (
+export function applyOperation<T>(
   doc: DBCache<Record<string, any>>,
   { path, op, value }: Operation<T> & { value?: T },
 ): Operation<T> | null {
   const current = getValueByPointer(doc.data, path)
-  const remove = { op: PatchOp.REMOVE, path} as const
-  const add = { op: PatchOp.ADD, path, value: current} as const
+  const remove = { op: PatchOp.REMOVE, path } as const
+  const add = { op: PatchOp.ADD, path, value: current } as const
   const replace = { op: PatchOp.REPLACE, path, value: current } as const
 
   doc.data = recursiveApply(doc.data, jsonPathToKeyArray(path), op, value)
 
   switch (op) {
     case PatchOp.REMOVE:
-      return current === undefined
-        ? null
-        : add
+      return current === undefined ? null : add
     case PatchOp.REPLACE:
     case PatchOp.ADD:
-      return current === undefined
-        ? remove
-        : replace
+      return current === undefined ? remove : replace
   }
 }
 
-function recursiveApply<T extends Record<string, any> | any[]> (data: T, path: readonly string[], op: PatchOp, value?: any): T {
+function recursiveApply<T extends Record<string, any> | any[]>(
+  data: T,
+  path: readonly string[],
+  op: PatchOp,
+  value?: any,
+): T {
   if (!path.length) return value
-  
+
   // object
   if (isObject(data)) {
     return recursiveApplyObject(data, path, op, value)
-  // array
+    // array
   } else if (Array.isArray(data)) {
     return recursiveApplyArray(data, path, op, value)
   } else {
@@ -68,7 +75,12 @@ function recursiveApply<T extends Record<string, any> | any[]> (data: T, path: r
   }
 }
 
-function recursiveApplyObject<T extends Record<string, any>> (data: T, path: readonly string[], op: PatchOp, value?: any): T {
+function recursiveApplyObject<T extends Record<string, any>>(
+  data: T,
+  path: readonly string[],
+  op: PatchOp,
+  value?: any,
+): T {
   const updated = recursiveApply(data[path[0]], path.slice(1), op, value)
   const result = {
     ...data,
@@ -82,7 +94,12 @@ function recursiveApplyObject<T extends Record<string, any>> (data: T, path: rea
   return result
 }
 
-function recursiveApplyArray<T extends any[]> (data: T, path: readonly string[], op: PatchOp, value?: any): T {
+function recursiveApplyArray<T extends any[]>(
+  data: T,
+  path: readonly string[],
+  op: PatchOp,
+  value?: any,
+): T {
   const index = parseInt(path[0])
 
   const updated = recursiveApply(data[index], path.slice(1), op, value)
@@ -98,12 +115,10 @@ function recursiveApplyArray<T extends any[]> (data: T, path: readonly string[],
   return result
 }
 
-function isObject (val: any): val is Record<string, unknown> {
+function isObject(val: any): val is Record<string, unknown> {
   return typeof val === 'object' && val !== null && !Array.isArray(val)
 }
 
-function jsonPathToKeyArray (path: string): string[] {
+function jsonPathToKeyArray(path: string): string[] {
   return path.split('/').slice(1)
 }
-
-

client/lib/patch-db.ts

@@ -11,30 +11,34 @@ export class PatchDB<T> {
   public rpcError$ = new Subject<RPCError>()
   public cache$ = new ReplaySubject<DBCache<T>>(1)
 
-  private sub = this.sources$.pipe(
-    switchMap(sources => merge(...sources.map(s => s.watch$(this.store))).pipe(
-      catchError(e => {
-        this.connectionError$.next(e)
+  private sub = this.sources$
+    .pipe(
+      switchMap(sources =>
+        merge(...sources.map(s => s.watch$(this.store))).pipe(
+          catchError(e => {
+            this.connectionError$.next(e)
 
-        return EMPTY
-      }),
-    )),
-  ).subscribe((res) => {
-    if ('result' in res) {
-      this.store.update(res.result)
-      this.cache$.next(this.store.cache)
-    } else {
-      this.rpcError$.next(res)
-    }
-  })
+            return EMPTY
+          }),
+        ),
+      ),
+    )
+    .subscribe(res => {
+      if ('result' in res) {
+        this.store.update(res.result)
+        this.cache$.next(this.store.cache)
+      } else {
+        this.rpcError$.next(res)
+      }
+    })
 
-  constructor (
+  constructor(
     private readonly sources$: Observable<Source<T>[]>,
     private readonly http: Http<T>,
     private readonly initialCache: DBCache<T>,
-  ) { }
+  ) {}
 
-  clean () {
+  clean() {
     this.sub.unsubscribe()
   }
 }

client/lib/source/mock-source.ts

@@ -5,9 +5,9 @@ import { Source } from './source'
 import { RPCResponse } from './ws-source'
 
 export class MockSource<T> implements Source<T> {
-  constructor (private readonly seed: Observable<Update<T>>) { }
+  constructor(private readonly seed: Observable<Update<T>>) {}
 
-  watch$ (): Observable<RPCResponse<Update<T>>> {
-    return this.seed.pipe(map((result) => ({ result, jsonrpc: '2.0' })))
+  watch$(): Observable<RPCResponse<Update<T>>> {
+    return this.seed.pipe(map(result => ({ result, jsonrpc: '2.0' })))
   }
 }

client/lib/source/poll-source.ts

@@ -1,5 +1,13 @@
 import { BehaviorSubject, concat, from, Observable, of } from 'rxjs'
-import { concatMap, delay, map, skip, switchMap, take, tap } from 'rxjs/operators'
+import {
+  concatMap,
+  delay,
+  map,
+  skip,
+  switchMap,
+  take,
+  tap,
+} from 'rxjs/operators'
 import { Store } from '../store'
 import { Http, Update } from '../types'
 import { Source } from './source'
@@ -10,17 +18,15 @@ export type PollConfig = {
 }
 
 export class PollSource<T> implements Source<T> {
-
-  constructor (
+  constructor(
     private readonly pollConfig: PollConfig,
     private readonly http: Http<T>,
-  ) { }
+  ) {}
 
-  watch$ (store: Store<T>): Observable<RPCResponse<Update<T>>> {
+  watch$(store: Store<T>): Observable<RPCResponse<Update<T>>> {
     const polling$ = new BehaviorSubject('')
 
-    const updates$ = of({ })
-    .pipe(
+    const updates$ = of({}).pipe(
       concatMap(_ => store.sequence$),
       concatMap(seq => this.http.getRevisions(seq)),
       take(1),
@@ -43,8 +49,7 @@ export class PollSource<T> implements Source<T> {
           return of(res) // takes Dump<T> and converts it into Observable<Dump<T>>
         }
       }),
-      map(result => ({ result,
-        jsonrpc: '2.0' })),
+      map(result => ({ result, jsonrpc: '2.0' })),
     )
   }
 }

client/lib/source/source.ts

@@ -4,5 +4,5 @@ import { Update } from '../types'
 import { RPCResponse } from './ws-source'
 
 export interface Source<T> {
-  watch$ (store?: Store<T>): Observable<RPCResponse<Update<T>>>
+  watch$(store?: Store<T>): Observable<RPCResponse<Update<T>>>
 }

client/lib/source/ws-source.ts

@@ -1,16 +1,18 @@
 import { Observable } from 'rxjs'
-import { webSocket, WebSocketSubject, WebSocketSubjectConfig } from 'rxjs/webSocket'
+import {
+  webSocket,
+  WebSocketSubject,
+  WebSocketSubjectConfig,
+} from 'rxjs/webSocket'
 import { Update } from '../types'
 import { Source } from './source'
 
 export class WebsocketSource<T> implements Source<T> {
   private websocket$: WebSocketSubject<RPCResponse<Update<T>>> | undefined
 
-  constructor (
-    private readonly url: string,
-  ) { }
+  constructor(private readonly url: string) {}
 
-  watch$ (): Observable<RPCResponse<Update<T>>> {
+  watch$(): Observable<RPCResponse<Update<T>>> {
     const fullConfig: WebSocketSubjectConfig<RPCResponse<Update<T>>> = {
       url: this.url,
       openObserver: {
@@ -48,7 +50,7 @@ class RpcError {
   message: string
   details: string
 
-  constructor (e: RPCError['error']) {
+  constructor(e: RPCError['error']) {
     this.code = e.code
     this.message = e.message
     this.details = e.data.details

client/lib/store.ts

@@ -11,10 +11,10 @@ export interface StashEntry {
 export class Store<T extends { [key: string]: any }> {
   cache: DBCache<T>
   sequence$: BehaviorSubject<number>
-  private watchedNodes: { [path: string]: ReplaySubject<any> } = { }
+  private watchedNodes: { [path: string]: ReplaySubject<any> } = {}
   private stash = new BTree<number, StashEntry>()
 
-  constructor (
+  constructor(
     private readonly http: Http<T>,
     private readonly initialCache: DBCache<T>,
   ) {
@@ -22,14 +22,81 @@ export class Store<T extends { [key: string]: any }> {
     this.sequence$ = new BehaviorSubject(initialCache.sequence)
   }
 
-  watch$ (): Observable<T>
-  watch$<P1 extends keyof T> (p1: P1): Observable<NonNullable<T[P1]>>
-  watch$<P1 extends keyof T, P2 extends keyof NonNullable<T[P1]>> (p1: P1, p2: P2): Observable<NonNullable<NonNullable<T[P1]>[P2]>>
-  watch$<P1 extends keyof T, P2 extends keyof NonNullable<T[P1]>, P3 extends keyof NonNullable<NonNullable<T[P1]>[P2]>> (p1: P1, p2: P2, p3: P3): Observable<NonNullable<NonNullable<NonNullable<T[P1]>[P2]>[P3]>>
-  watch$<P1 extends keyof T, P2 extends keyof 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$<P1 extends keyof T, P2 extends keyof NonNullable<T[P1]>, P3 extends keyof NonNullable<NonNullable<T[P1]>[P2]>, P4 extends keyof NonNullable<NonNullable<NonNullable<T[P1]>[P2]>[P3]>, P5 extends keyof NonNullable<NonNullable<NonNullable<NonNullable<T[P1]>[P2]>[P3]>[P4]>> (p1: P1, p2: P2, p3: P3, p4: P4, p5: P5): Observable<NonNullable<NonNullable<NonNullable<NonNullable<NonNullable<T[P1]>[P2]>[P3]>[P4]>[P5]>>
-  watch$<P1 extends keyof T, P2 extends keyof 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$(): Observable<T>
+  watch$<P1 extends keyof T>(p1: P1): Observable<NonNullable<T[P1]>>
+  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 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$<
+    P1 extends keyof T,
+    P2 extends keyof NonNullable<T[P1]>,
+    P3 extends keyof NonNullable<NonNullable<T[P1]>[P2]>,
+    P4 extends keyof NonNullable<NonNullable<NonNullable<T[P1]>[P2]>[P3]>,
+  >(
+    p1: P1,
+    p2: P2,
+    p3: P3,
+    p4: P4,
+  ): Observable<
+    NonNullable<NonNullable<NonNullable<NonNullable<T[P1]>[P2]>[P3]>[P4]>
+  >
+  watch$<
+    P1 extends keyof T,
+    P2 extends keyof 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$<
+    P1 extends keyof T,
+    P2 extends keyof NonNullable<T[P1]>,
+    P3 extends keyof NonNullable<NonNullable<T[P1]>[P2]>,
+    P4 extends keyof NonNullable<NonNullable<NonNullable<T[P1]>[P2]>[P3]>,
+    P5 extends keyof NonNullable<
+      NonNullable<NonNullable<NonNullable<T[P1]>[P2]>[P3]>[P4]
+    >,
+    P6 extends keyof NonNullable<
+      NonNullable<NonNullable<NonNullable<NonNullable<T[P1]>[P2]>[P3]>[P4]>[P5]
+    >,
+  >(
+    p1: P1,
+    p2: P2,
+    p3: P3,
+    p4: P4,
+    p5: P5,
+    p6: P6,
+  ): Observable<
+    NonNullable<
+      NonNullable<
+        NonNullable<
+          NonNullable<NonNullable<NonNullable<T[P1]>[P2]>[P3]>[P4]
+        >[P5]
+      >[P6]
+    >
+  >
+  watch$(...args: (string | number)[]): Observable<any> {
     const path = `/${args.join('/')}`
     if (!this.watchedNodes[path]) {
       this.watchedNodes[path] = new ReplaySubject(1)
@@ -38,7 +105,7 @@ export class Store<T extends { [key: string]: any }> {
     return this.watchedNodes[path].asObservable()
   }
 
-  update (update: Update<T>): void {
+  update(update: Update<T>): void {
     if (this.isRevision(update)) {
       // if old or known, return
       if (update.id <= this.cache.sequence || this.stash.get(update.id)) return
@@ -48,24 +115,24 @@ export class Store<T extends { [key: string]: any }> {
     }
   }
 
-  reset (): void {
+  reset(): void {
     Object.values(this.watchedNodes).forEach(node => node.complete())
-    this.watchedNodes = { }
+    this.watchedNodes = {}
     this.stash.clear()
     this.sequence$.next(0)
     this.cache = {
       sequence: 0,
-      data: { } as any,
+      data: {} as any,
     }
   }
 
-  private updateValue (path: string): void {
+  private updateValue(path: string): void {
     const value = getValueByPointer(this.cache.data, path)
 
     this.watchedNodes[path].next(value)
   }
 
-  private handleRevision (revision: Revision): void {
+  private handleRevision(revision: Revision): void {
     // stash the revision
     this.stash.set(revision.id, { revision, undo: [] })
 
@@ -77,7 +144,7 @@ export class Store<T extends { [key: string]: any }> {
     this.processStashed(revision.id)
   }
 
-  private handleDump ({ value, id }: Dump<T>): void {
+  private handleDump({ value, id }: Dump<T>): void {
     this.cache.data = { ...value }
     this.stash.deleteRange(this.cache.sequence, id, false)
     this.updateWatchedNodes('')
@@ -85,12 +152,12 @@ export class Store<T extends { [key: string]: any }> {
     this.processStashed(id + 1)
   }
 
-  private processStashed (id: number): void {
+  private processStashed(id: number): void {
     this.undoRevisions(id)
     this.applyRevisions(id)
   }
 
-  private undoRevisions (id: number): void {
+  private undoRevisions(id: number): void {
     let stashEntry = this.stash.get(this.stash.maxKey() as number)
 
     while (stashEntry && stashEntry.revision.id > id) {
@@ -99,7 +166,7 @@ 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
     while (revision) {
       let undo: Operation<unknown>[] = []
@@ -136,7 +203,7 @@ export class Store<T extends { [key: string]: any }> {
     this.stash.deleteRange(0, this.cache.sequence, false)
   }
 
-  private updateWatchedNodes (revisionPath: string) {
+  private updateWatchedNodes(revisionPath: string) {
     const kill = (path: string) => {
       this.watchedNodes[path].complete()
       delete this.watchedNodes[path]
@@ -151,12 +218,12 @@ export class Store<T extends { [key: string]: any }> {
     })
   }
 
-  private updateSequence (sequence: number): void {
+  private updateSequence(sequence: number): void {
     this.cache.sequence = 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
   }
 }

client/lib/types.ts

@@ -1,9 +1,14 @@
 import { Operation } from './json-patch-lib'
 
 // revise a collection of nodes.
-export type Revision = { id: number, patch: Operation<unknown>[], expireId: string | null }
+export type Revision = {
+  id: number
+  patch: Operation<unknown>[]
+  expireId: string | null
+}
+
 // dump/replace the entire store with T
-export type Dump<T> = { id: number, value: T, expireId: string | null }
+export type Dump<T> = { id: number; value: T; expireId: string | null }
 
 export type Update<T> = Revision | Dump<T>
 
@@ -14,16 +19,16 @@ export enum PatchOp {
 }
 
 export interface Http<T> {
-  getRevisions (since: number): Promise<Revision[] | Dump<T>>
-  getDump (): Promise<Dump<T>>
+  getRevisions(since: number): Promise<Revision[] | Dump<T>>
+  getDump(): Promise<Dump<T>>
 }
 
 export interface Bootstrapper<T> {
-  init (): Promise<DBCache<T>>
-  update (cache: DBCache<T>): Promise<void>
+  init(): Promise<DBCache<T>>
+  update(cache: DBCache<T>): Promise<void>
 }
 
-export interface DBCache<T extends Record<string, any>>{
-  sequence: number,
+export interface DBCache<T extends Record<string, any>> {
+  sequence: number
   data: T
 }

client/package.json

@@ -7,7 +7,8 @@
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
   "scripts": {
-    "build": "tsc"
+    "build": "tsc",
+    "check": "tsc --noEmit --skipLibCheck"
   },
   "dependencies": {
     "sorted-btree": "1.5.0",
@@ -19,8 +20,20 @@
   "devDependencies": {
     "@types/node": "16.4.13",
     "@types/uuid": "8.3.1",
+    "husky": "^4.3.8",
+    "lint-staged": "^12.3.7",
+    "prettier": "^2.6.1",
     "ts-node": "10.2.0",
     "tslint": "6.1.3",
     "typescript": "4.3.5"
+  },
+  "husky": {
+    "hooks": {
+      "pre-commit": "lint-staged && npm run check"
+    }
+  },
+  "lint-staged": {
+    "**/*.{js,ts,html,md,less,json}": "prettier --write",
+    "*.ts": "tslint --fix"
   }
 }

client/tslint.json

@@ -2,17 +2,9 @@
   "rules": {
     "no-unused-variable": true,
     "no-unused-expression": true,
-    "space-before-function-paren": true,
-    "semicolon": [
-      true,
-      "never"
-    ],
+    "semicolon": [true, "never"],
     "no-trailing-whitespace": true,
-    "indent": [
-      true,
-      "spaces",
-      2
-    ],
+    "indent": [true, "spaces", 2],
     "whitespace": [
       true,
       "check-branch",
@@ -24,8 +16,7 @@
       "check-type",
       "check-typecast",
       "check-type-operator",
-      "check-preblock",
-      "check-postbrace"
+      "check-preblock"
     ],
     "trailing-comma": [
       true,
@@ -39,9 +30,6 @@
         "singleline": "never"
       }
     ],
-    "quotemark": [
-      true,
-      "single"
-    ]
+    "quotemark": [true, "single"]
   }
 }