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/*
This file is part of GNU Taler
(C) 2022 Taler Systems SA
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
TALER is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* Implementation of dev experiments, i.e. scenarios
* triggered by taler://dev-experiment URIs.
*
* @author Florian Dold <dold@taler.net>
*/
/**
* Imports.
*/
import { Logger, parseDevExperimentUri } from "@gnu-taler/taler-util";
import { ConfigRecordKey } from "./db.js";
import { InternalWalletState } from "./internal-wallet-state.js";
import {
HttpRequestLibrary,
HttpRequestOptions,
HttpResponse,
} from "@gnu-taler/taler-util/http";
const logger = new Logger("dev-experiments.ts");
export async function setDevMode(
ws: InternalWalletState,
enabled: boolean,
): Promise<void> {
if (enabled) {
logger.info("enabling devmode");
await ws.db
.mktx((x) => [x.config])
.runReadWrite(async (tx) => {
tx.config.put({
key: ConfigRecordKey.DevMode,
value: true,
});
});
await maybeInitDevMode(ws);
} else {
logger.info("disabling devmode");
await ws.db
.mktx((x) => [x.config])
.runReadWrite(async (tx) => {
tx.config.put({
key: ConfigRecordKey.DevMode,
value: false,
});
});
await leaveDevMode(ws);
}
}
/**
* Apply a dev experiment to the wallet database / state.
*/
export async function applyDevExperiment(
ws: InternalWalletState,
uri: string,
): Promise<void> {
logger.info(`applying dev experiment ${uri}`);
const parsedUri = parseDevExperimentUri(uri);
if (!parsedUri) {
logger.info("unable to parse dev experiment URI");
return;
}
if (!ws.devModeActive) {
throw Error(
"can't handle devmode URI (other than enable-devmode) unless devmode is active",
);
}
throw Error(`dev-experiment id not understood ${parsedUri.devExperimentId}`);
}
/**
* Enter dev mode, if the wallet's config entry in the DB demands it.
*/
export async function maybeInitDevMode(ws: InternalWalletState): Promise<void> {
const devMode = await ws.db
.mktx((x) => [x.config])
.runReadOnly(async (tx) => {
const rec = await tx.config.get(ConfigRecordKey.DevMode);
if (!rec || rec.key !== ConfigRecordKey.DevMode) {
return false;
}
return rec.value;
});
if (!devMode) {
ws.devModeActive = false;
return;
}
ws.devModeActive = true;
if (ws.http instanceof DevExperimentHttpLib) {
return;
}
ws.http = new DevExperimentHttpLib(ws.http);
}
export async function leaveDevMode(ws: InternalWalletState): Promise<void> {
if (ws.http instanceof DevExperimentHttpLib) {
ws.http = ws.http.underlyingLib;
}
ws.devModeActive = false;
}
export class DevExperimentHttpLib implements HttpRequestLibrary {
_isDevExperimentLib = true;
underlyingLib: HttpRequestLibrary;
constructor(lib: HttpRequestLibrary) {
this.underlyingLib = lib;
}
get(
url: string,
opt?: HttpRequestOptions | undefined,
): Promise<HttpResponse> {
logger.trace(`devexperiment httplib ${url}`);
return this.underlyingLib.get(url, opt);
}
postJson(
url: string,
body: any,
opt?: HttpRequestOptions | undefined,
): Promise<HttpResponse> {
logger.trace(`devexperiment httplib ${url}`);
return this.underlyingLib.postJson(url, body, opt);
}
fetch(
url: string,
opt?: HttpRequestOptions | undefined,
): Promise<HttpResponse> {
logger.trace(`devexperiment httplib ${url}`);
return this.underlyingLib.fetch(url, opt);
}
}
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