/*
This file is part of GNU Taler
(C) 2022 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
*/
import {
AmountJson,
Amounts,
GetExchangeTosResult,
} from "@gnu-taler/taler-util";
import { VNode, createElement } from "preact";
function getJsonIfOk(r: Response): Promise {
if (r.ok) {
return r.json();
}
if (r.status >= 400 && r.status < 500) {
throw new Error(`URL may not be right: (${r.status}) ${r.statusText}`);
}
throw new Error(
`Try another server: (${r.status}) ${r.statusText || "internal server error"
}`,
);
}
export async function queryToSlashConfig(url: string): Promise {
return fetch(new URL("config", url).href)
.catch(() => {
throw new Error(`Network error`);
})
.then(getJsonIfOk);
}
function timeout(ms: number, promise: Promise): Promise {
return new Promise((resolve, reject) => {
const timer = setTimeout(() => {
reject(
new Error(
`Timeout: the query took longer than ${Math.floor(ms / 1000)} secs`,
),
);
}, ms);
promise
.then((value) => {
clearTimeout(timer);
resolve(value);
})
.catch((reason) => {
clearTimeout(timer);
reject(reason);
});
});
}
export async function queryToSlashKeys(url: string): Promise {
const endpoint = new URL("keys", url);
const query = fetch(endpoint.href)
.catch(() => {
throw new Error(`Network error`);
})
.then(getJsonIfOk);
return timeout(3000, query);
}
export function buildTermsOfServiceState(
tos: GetExchangeTosResult,
): TermsState {
const content: TermsDocument | undefined = parseTermsOfServiceContent(
tos.contentType,
tos.content,
);
const status: TermsStatus = buildTermsOfServiceStatus(
tos.content,
tos.acceptedEtag,
tos.currentEtag,
);
return { content, status, version: tos.currentEtag };
}
export function buildTermsOfServiceStatus(
content: string | undefined,
acceptedVersion: string | undefined,
currentVersion: string | undefined,
): TermsStatus {
return !content
? "notfound"
: !acceptedVersion
? "new"
: acceptedVersion !== currentVersion
? "changed"
: "accepted";
}
function parseTermsOfServiceContent(
type: string,
text: string,
): TermsDocument | undefined {
if (type === "text/xml") {
try {
const document = new DOMParser().parseFromString(text, "text/xml");
return { type: "xml", document };
} catch (e) {
console.log(e);
}
} else if (type === "text/html") {
try {
const href = new URL(text);
return { type: "html", href };
} catch (e) {
console.log(e);
}
} else if (type === "text/json") {
try {
const data = JSON.parse(text);
return { type: "json", data };
} catch (e) {
console.log(e);
}
} else if (type === "text/pdf") {
try {
const location = new URL(text);
return { type: "pdf", location };
} catch (e) {
console.log(e);
}
} else if (type === "text/plain") {
try {
const content = text;
return { type: "plain", content };
} catch (e) {
console.log(e);
}
}
return undefined;
}
export type TermsState = {
content: TermsDocument | undefined;
status: TermsStatus;
version: string;
};
type TermsStatus = "new" | "accepted" | "changed" | "notfound";
type TermsDocument =
| TermsDocumentXml
| TermsDocumentHtml
| TermsDocumentPlain
| TermsDocumentJson
| TermsDocumentPdf;
export interface TermsDocumentXml {
type: "xml";
document: Document;
}
export interface TermsDocumentHtml {
type: "html";
href: URL;
}
export interface TermsDocumentPlain {
type: "plain";
content: string;
}
export interface TermsDocumentJson {
type: "json";
data: any;
}
export interface TermsDocumentPdf {
type: "pdf";
location: URL;
}
export type StateFunc = (p: S) => VNode;
export type StateViewMap = {
[S in StateType as S["status"]]: StateFunc;
};
type RecursiveState = S | (() => RecursiveState)
export function compose(
name: string,
hook: (p: PType) => RecursiveState,
viewMap: StateViewMap,
): (p: PType) => VNode {
function withHook(stateHook: () => RecursiveState): () => VNode {
function TheComponent(): VNode {
const state = stateHook();
if (typeof state === "function") {
const subComponent = withHook(state)
return createElement(subComponent, {});
}
const statusName = state.status as unknown as SType["status"];
const viewComponent = viewMap[statusName] as unknown as StateFunc;
return createElement(viewComponent, state);
}
TheComponent.name = `${name}`;
return TheComponent;
}
return (p: PType) => {
const h = withHook(() => hook(p))
return h()
};
}