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Refactor token storage & renewal with TokenState class #63
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,152 @@ | ||
| import { | ||
| getCurrentAccessToken, | ||
| getRefreshToken, | ||
| resetAllTokens, | ||
| storeAccessToken, | ||
| storeCurrentAccessToken, | ||
| storeRefreshToken, | ||
| } from "../utils/storage"; | ||
| import { TokenPayload, getTokenPayload, isTokenExpired } from "../utils/token"; | ||
|
|
||
| type Subscriber = (token: TokenPayload | null) => void; | ||
| type Unsubscribe = () => void; | ||
|
|
||
| export class TokenState { | ||
| private _refreshToken = getRefreshToken(); | ||
| private _refreshTokenPayload: TokenPayload | null = null; | ||
| private _accessToken = getCurrentAccessToken(); | ||
| private _accessTokenPayload: TokenPayload | null = null; | ||
| private refreshTokenSubscribers: Subscriber[] = []; | ||
| private accessTokenSubscribers: Subscriber[] = []; | ||
|
|
||
| constructor() { | ||
| this.afterRefreshTokenUpdate(this.refreshToken, false); | ||
| this.afterAccessTokenUpdate(this.accessToken, false); | ||
| } | ||
|
|
||
| get refreshToken() { | ||
| return this._refreshToken; | ||
| } | ||
| set refreshToken(refreshToken: string | null) { | ||
| this._refreshToken = refreshToken; | ||
| this.afterRefreshTokenUpdate(refreshToken); | ||
| } | ||
|
|
||
| get refreshTokenPayload() { | ||
| return this._refreshTokenPayload; | ||
| } | ||
|
|
||
| get accessToken() { | ||
| return this._accessToken; | ||
| } | ||
| set accessToken(accessToken: string | null) { | ||
| this._accessToken = accessToken; | ||
| this.afterAccessTokenUpdate(accessToken); | ||
| } | ||
|
|
||
| get accessTokenPayload() { | ||
| return this._accessTokenPayload; | ||
| } | ||
|
|
||
| get authenticated(): boolean { | ||
| return Boolean(this.accessToken); | ||
| } | ||
|
|
||
| get scope(): string | null { | ||
| return this.accessTokenPayload?.scope ?? null; | ||
| } | ||
|
|
||
| get locale(): string | null { | ||
| return this.accessTokenPayload?.locale ?? null; | ||
| } | ||
|
|
||
| get instanceId(): string | null { | ||
| return this.accessTokenPayload?.instanceId ?? null; | ||
| } | ||
|
|
||
| isRefreshTokenExpired(): boolean { | ||
| return isTokenExpired(this._refreshTokenPayload); | ||
| } | ||
|
|
||
| resetAllTokens(): void { | ||
| this._refreshToken = null; | ||
| this._refreshTokenPayload = null; | ||
|
|
||
| this._accessToken = null; | ||
| this._accessTokenPayload = null; | ||
|
|
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| resetAllTokens(); | ||
| } | ||
|
|
||
| onRefreshTokenUpdate(callback: Subscriber): Unsubscribe { | ||
| this.refreshTokenSubscribers.push(callback); | ||
|
|
||
| // Initially call with current value | ||
| callback(this.refreshTokenPayload); | ||
|
|
||
| return () => { | ||
| const index = this.refreshTokenSubscribers.findIndex( | ||
| (s) => s === callback, | ||
| ); | ||
| this.refreshTokenSubscribers.splice(index, 1); | ||
| }; | ||
| } | ||
|
|
||
| onAccessTokenUpdate(callback: Subscriber): Unsubscribe { | ||
| this.accessTokenSubscribers.push(callback); | ||
|
|
||
| // Initially call with current value | ||
| callback(this.accessTokenPayload); | ||
|
|
||
| return () => { | ||
| const index = this.accessTokenSubscribers.findIndex( | ||
| (s) => s === callback, | ||
| ); | ||
| this.accessTokenSubscribers.splice(index, 1); | ||
| }; | ||
| } | ||
|
|
||
| private afterRefreshTokenUpdate( | ||
| refreshToken: string | null, | ||
| store = true, | ||
| ): void { | ||
| this._refreshTokenPayload = refreshToken | ||
| ? getTokenPayload(refreshToken) | ||
| : null; | ||
|
|
||
| if (refreshToken && store) { | ||
| storeRefreshToken(refreshToken); | ||
| } | ||
|
|
||
| this.notifyRefreshTokenSubscribers(); | ||
| } | ||
|
|
||
| private afterAccessTokenUpdate( | ||
| accessToken: string | null, | ||
| store = true, | ||
| ): void { | ||
| const payload = accessToken ? getTokenPayload(accessToken) : null; | ||
| this._accessTokenPayload = payload; | ||
|
|
||
| if (accessToken && payload && store) { | ||
| storeAccessToken(payload.scope, accessToken); | ||
| storeCurrentAccessToken(accessToken); | ||
| } | ||
|
|
||
| this.notifyAccessTokenSubscribers(); | ||
| } | ||
|
|
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| private notifyRefreshTokenSubscribers(): void { | ||
| this.refreshTokenSubscribers.forEach((callback) => | ||
| callback(this.refreshTokenPayload), | ||
| ); | ||
| } | ||
|
|
||
| private notifyAccessTokenSubscribers(): void { | ||
| this.accessTokenSubscribers.forEach((callback) => | ||
| callback(this.accessTokenPayload), | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| export const tokenState = new TokenState(); |
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