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/*
This file is part of GNU Taler
(C) 2022-2024 Taler Systems S.A.
GNU 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.
GNU 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
GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
import { stringifyTalerUri, TalerUri } from "@gnu-taler/taler-util";
import { ComponentChildren, createContext, h, VNode } from "preact";
import { useContext } from "preact/hooks";
/**
* https://docs.taler.net/design-documents/039-taler-browser-integration.html
*
* @param uri
*/
function createHeadMetaTag(uri: TalerUri, onNotFound?: () => void) {
const meta = document.createElement("meta");
meta.setAttribute("name", "taler-uri");
meta.setAttribute("content", stringifyTalerUri(uri));
document.head.appendChild(meta);
let walletFound = false;
window.addEventListener("beforeunload", () => {
walletFound = true;
});
setTimeout(() => {
if (!walletFound && onNotFound) {
onNotFound();
}
}, 10); //very short timeout
}
interface Type {
/**
* Tell the active wallet that an action is found
*
* @param uri
* @returns
*/
publishTalerAction: (uri: TalerUri, onNotFound?: () => void) => void;
}
// @ts-expect-error default value to undefined, should it be another thing?
const Context = createContext<Type>(undefined);
export const useTalerWalletIntegrationAPI = (): Type => useContext(Context);
export const TalerWalletIntegrationBrowserProvider = ({
children,
}: {
children: ComponentChildren;
}): VNode => {
const value: Type = {
publishTalerAction: createHeadMetaTag,
};
return h(Context.Provider, {
value,
children,
});
};
export const TalerWalletIntegrationTestingProvider = ({
children,
value,
}: {
children: ComponentChildren;
value: Type;
}): VNode => {
return h(Context.Provider, {
value,
children,
});
};
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