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/*
This file is part of GNU Taler
(C) 2021 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/>
*/
/**
*
* @author Sebastian Javier Marchano (sebasjm)
*/
import { StateUpdater, useState } from "preact/hooks";
export type ValueOrFunction<T> = T | ((p: T) => T)
const calculateRootPath = () => {
const rootPath = typeof window !== undefined ? window.location.origin + window.location.pathname : '/'
return rootPath
}
export function useBackendURL(url?: string): [string, boolean, StateUpdater<string>, () => void] {
const [value, setter] = useNotNullLocalStorage('backend-url', url || calculateRootPath())
const [triedToLog, setTriedToLog] = useLocalStorage('tried-login')
const checkedSetter = (v: ValueOrFunction<string>) => {
setTriedToLog('yes')
return setter(p => (v instanceof Function ? v(p) : v).replace(/\/$/, ''))
}
const resetBackend = () => {
setTriedToLog(undefined)
}
return [value, !!triedToLog, checkedSetter, resetBackend]
}
export function useBackendDefaultToken(): [string | undefined, StateUpdater<string | undefined>] {
return useLocalStorage('backend-token')
}
export function useBackendInstanceToken(id: string): [string | undefined, StateUpdater<string | undefined>] {
const [token, setToken] = useLocalStorage(`backend-token-${id}`)
const [defaultToken, defaultSetToken] = useBackendDefaultToken()
// instance named 'default' use the default token
if (id === 'default') {
return [defaultToken, defaultSetToken]
}
return [token, setToken]
}
export function useLang(initial?: string): [string, StateUpdater<string>] {
const browserLang = typeof window !== "undefined" ? navigator.language || (navigator as any).userLanguage : undefined;
const defaultLang = (browserLang || initial || 'en').substring(0, 2)
return useNotNullLocalStorage('lang-preference', defaultLang)
}
export function useLocalStorage(key: string, initialValue?: string): [string | undefined, StateUpdater<string | undefined>] {
const [storedValue, setStoredValue] = useState<string | undefined>((): string | undefined => {
return typeof window !== "undefined" ? window.localStorage.getItem(key) || initialValue : initialValue;
});
const setValue = (value?: string | ((val?: string) => string | undefined)) => {
setStoredValue(p => {
const toStore = value instanceof Function ? value(p) : value
if (typeof window !== "undefined") {
if (!toStore) {
window.localStorage.removeItem(key)
} else {
window.localStorage.setItem(key, toStore);
}
}
return toStore
})
};
return [storedValue, setValue];
}
export function useNotNullLocalStorage(key: string, initialValue: string): [string, StateUpdater<string>] {
const [storedValue, setStoredValue] = useState<string>((): string => {
return typeof window !== "undefined" ? window.localStorage.getItem(key) || initialValue : initialValue;
});
const setValue = (value: string | ((val: string) => string)) => {
const valueToStore = value instanceof Function ? value(storedValue) : value;
setStoredValue(valueToStore);
if (typeof window !== "undefined") {
if (!valueToStore) {
window.localStorage.removeItem(key)
} else {
window.localStorage.setItem(key, valueToStore);
}
}
};
return [storedValue, setValue];
}
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