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Store.ts
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Store.ts
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import { ChangeFn } from "automerge/frontend"
import * as Debug from "debug"
import * as Rx from "rxjs"
import { keyPair } from "hypercore/lib/crypto"
import * as Base58 from "bs58"
import * as Msg from "./Msg"
import Queue from "./Queue"
import { FrontendManager } from "hypermerge/frontend"
const log = Debug("store:front")
;(window as any).peek = () => {
console.log("please use peek() on the backend console")
}
export type Activity = Msg.UploadActivity | Msg.DownloadActivity
export default class Store {
sendQueue = new Queue<Msg.FrontendToBackend>("Store")
index: { [id: string]: FrontendManager<any> } = {}
peerCount: { [id: string]: number } = {}
feedCount: { [id: string]: number } = {}
presence$: Rx.BehaviorSubject<Msg.Presence | null>
clipper$: Rx.BehaviorSubject<Msg.Clipper | null>
control$: Rx.BehaviorSubject<Msg.Control>
fpsToggle$: Rx.BehaviorSubject<Msg.Toggle>
constructor() {
log("constructing")
this.presence$ = new Rx.BehaviorSubject<Msg.Presence | null>(null)
this.clipper$ = new Rx.BehaviorSubject<Msg.Clipper | null>(null)
this.control$ = new Rx.BehaviorSubject<Msg.Control>({
type: "Control",
url: this.getWorkspace(),
})
this.fpsToggle$ = new Rx.BehaviorSubject<Msg.Toggle>({
type: "Toggle",
state: this.shouldHideFPSCounter(),
})
}
create(setup: ChangeFn<any>): FrontendManager<any> {
const buffers = keyPair()
const keys = {
publicKey: Base58.encode(buffers.publicKey),
secretKey: Base58.encode(buffers.secretKey),
}
const docId = keys.publicKey
log("create", docId)
this.sendToBackend({
type: "Create",
docId,
keys,
})
const manager = this.manager(docId, docId)
manager.change(setup)
return manager
}
manager(docId: string, actorId?: string): FrontendManager<any> {
if (this.index[docId]) return this.index[docId]
log("manager", docId, actorId)
const manager = new FrontendManager<any>(docId, actorId)
this.index[docId] = manager
manager.on("needsActorId", () => {
log("needsActorId", docId)
this.sendToBackend({
type: "ActorIdRequest",
docId,
})
})
manager.on("request", change => {
this.sendToBackend({
type: "ChangeRequest",
docId,
change,
})
})
this.sendToBackend({ type: "Open", docId })
// TODO:
// port.onDisconnect.addListener(() => {
// console.log("Port disconnect manager", docId)
// manager.release()
// delete this.index[docId]
// })
return manager
}
clipper(): Rx.Observable<Msg.Clipper | null> {
return this.clipper$
}
control(): Rx.Observable<Msg.Control> {
return this.control$
}
fpsToggle(): Rx.Observable<Msg.Toggle> {
return this.fpsToggle$
}
getWorkspace(): string | null {
return localStorage.workspaceUrl || null
}
setWorkspace(url: string | null) {
url ? (localStorage.workspaceUrl = url) : delete localStorage.workspaceUrl
this.control$.next({ type: "Control", url })
}
shouldHideFPSCounter() {
return (
localStorage.hideFPSCounter && JSON.parse(localStorage.hideFPSCounter)
)
}
toggleFPSCounter() {
const oldState =
localStorage.hideFPSCounter && JSON.parse(localStorage.hideFPSCounter)
localStorage.hideFPSCounter = JSON.stringify(!oldState)
this.fpsToggle$.next({ type: "Toggle", state: this.shouldHideFPSCounter() })
}
activity(id: string): Rx.Observable<Activity> {
return new Rx.Observable(obs => {
// TODO:
// const port = chrome.runtime.connect({ name: `${id}/activity` })
// port.onMessage.addListener(msg => obs.next(msg))
// port.onDisconnect.addListener(() => obs.complete())
})
}
presence(): Rx.Observable<Msg.Presence | null> {
return this.presence$
}
sendToBackend(msg: Msg.FrontendToBackend) {
this.sendQueue.push(msg)
}
onMessage(msg: Msg.BackendToFrontend) {
switch (msg.type) {
case "DocReady": {
log("DocReady", msg.docId)
const manager = this.manager(msg.docId)
manager.init(msg.actorId, msg.patch)
break
}
case "DocInfo": {
log("DocInfo", msg.docId, msg.peers, msg.feeds)
const manager = this.manager(msg.docId)
this.peerCount[msg.docId] = msg.peers
this.feedCount[msg.docId] = msg.feeds
manager.emit("info", msg.peers, msg.feeds)
break
}
case "ApplyPatch": {
log("ApplyPatch", msg.docId)
const manager = this.manager(msg.docId)
manager.patch(msg.patch)
break
}
case "SetActorId": {
const manager = this.manager(msg.docId)
manager.setActorId(msg.actorId)
break
}
case "Clipper":
this.clipper$.next(msg)
break
case "Presence":
this.presence$.next(msg)
break
case "Upload":
break
case "Download":
break
}
}
}