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34 changes: 25 additions & 9 deletions webapp/_webapp/src/libs/apiclient.ts
Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ import { EventEmitter } from "events";
import { ErrorCode, ErrorSchema } from "../pkg/gen/apiclient/shared/v1/shared_pb";
import { errorToast } from "./toasts";
import { storage } from "./storage";
import { useAuthStore } from "../stores/auth-store";

// Exhaustive type check helper - will cause compile error if a case is not handled
const assertNever = (x: never): never => {
Expand All @@ -29,6 +30,7 @@ class ApiClient {
private axiosInstance: AxiosInstance;
private refreshToken: string | null;
private onTokenRefreshedEventEmitter: EventEmitter;
private refreshPromise: Promise<void> | null = null;

constructor(baseURL: string, apiVersion: ApiVersion) {
this.axiosInstance = axios.create({
Expand Down Expand Up @@ -64,6 +66,8 @@ class ApiClient {
}

setTokens(token: string, refreshToken: string): void {
useAuthStore.getState().setToken(token);
useAuthStore.getState().setRefreshToken(refreshToken);
this.refreshToken = refreshToken;
this.axiosInstance.defaults.headers.common["Authorization"] = `Bearer ${token}`;
}
Expand All @@ -89,15 +93,27 @@ class ApiClient {
}

async refresh() {
const response = await this.axiosInstance.post<JsonValue>("/auth/refresh", {
refreshToken: this.refreshToken,
});
const resp = fromJson(RefreshTokenResponseSchema, response.data);
this.setTokens(resp.token, resp.refreshToken);
this.onTokenRefreshedEventEmitter.emit("tokenRefreshed", {
token: resp.token,
refreshToken: resp.refreshToken,
});
if (this.refreshPromise) {
return this.refreshPromise;
}

this.refreshPromise = (async () => {
try {
const response = await this.axiosInstance.post<JsonValue>("/auth/refresh", {
refreshToken: this.refreshToken,
});
const resp = fromJson(RefreshTokenResponseSchema, response.data);
this.setTokens(resp.token, resp.refreshToken);
this.onTokenRefreshedEventEmitter.emit("tokenRefreshed", {
token: resp.token,
refreshToken: resp.refreshToken,
});
} finally {
this.refreshPromise = null;
}
})();

return this.refreshPromise;
}

private async requestWithRefresh(config: AxiosRequestConfig): Promise<JsonValue> {
Expand Down