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playable.ts
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playable.ts
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import type { Startable } from '@libp2p/interfaces/startable'
/**
* Implements {@link https://github.com/libp2p/js-libp2p-interfaces/tree/master/packages/interfaces#startable
* | Libp2p's Startable interface} for easy reuse with async code.
*
* @public
*/
export class Playable implements Startable {
private _isStarted: boolean
isStarted (): boolean {
return this._isStarted
}
private _starting: Promise<void> | null
private _stopping: Promise<void> | null
constructor (
private readonly lifecycle: {
starting(): Promise<void>
stopping(): Promise<void>
}
) {
this._isStarted = false
this._starting = null
this._stopping = null
}
async start (): Promise<void> {
if (this.isStarted()) {
return
}
if (this._starting != null) {
await this._starting; return
}
if (this._stopping != null) {
await this._stopping
}
this._starting = this.lifecycle.starting()
await this._starting
.then(() => {
this._isStarted = true
})
.finally(() => {
this._starting = null
})
}
async stop (): Promise<void> {
if (!this.isStarted()) {
return
}
if (this._stopping != null) {
await this._stopping; return
}
if (this._starting != null) {
await this._starting
}
this._stopping = this.lifecycle.stopping()
await this._stopping
.then(() => {
this._isStarted = false
})
.finally(() => {
this._stopping = null
})
}
}