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import { Resource, RespackEntry } from "./resources.ts";
export abstract class Loader {
num_loading: number = 0
abstract download(res: Resource<undefined>): Promise<Uint8Array>
abstract get_entry(): Promise<Resource<RespackEntry>>;
abstract wait_ready(): Promise<void>
}
export class HTTPLoader extends Loader {
constructor() {
super();
}
// deno-lint-ignore require-await
async wait_ready(): Promise<void> {
return
}
async download<T>(res: Resource<T>): Promise<Uint8Array> {
this.num_loading += 1
const resp = await fetch(`http://127.0.0.1:28556/${res.toString()}`)
if (!resp.ok) throw new Error("aaaa");
const buf = await resp.bytes()
this.num_loading -= 1
return buf
}
async get_entry(): Promise<Resource<RespackEntry>> {
const resp = await fetch("http://127.0.0.1:28556/entry")
if (!resp.ok) throw new Error("aaaa");
return new Resource(await resp.bytes())
}
}
export class WSLoader extends Loader {
ws: WebSocket
queue: ((r: Uint8Array) => void)[] = []
constructor() {
super()
this.ws = new WebSocket(`http://127.0.0.1:28557/`)
this.ws.onopen = () => console.log("open");
this.ws.onclose = () => console.log("close");
this.ws.onmessage = m => {
if (typeof m.data == "string") throw new Error(m.data);
if (m.data instanceof Blob) {
const h = this.queue.shift()!
m.data.arrayBuffer()
.then(b => new Uint8Array(b))
.then(h)
.then(() => this.num_loading -= 1)
}
}
}
wait_ready(): Promise<void> {
return new Promise(resolve => {
if (this.ws.readyState == this.ws.OPEN) return resolve()
else this.ws.addEventListener("open", () => resolve())
})
}
download<T>(res: Resource<T>): Promise<Uint8Array> {
return new Promise(resolve => {
this.num_loading += 1
this.queue.push(resolve)
this.ws.send(res.hash)
})
}
get_entry(): Promise<Resource<RespackEntry>> {
return new Promise(resolve => {
this.num_loading += 1
this.queue.push(buf => resolve(new Resource(buf)))
this.ws.send("entry")
})
}
}
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