demarches-normaliennes/app/javascript/components/shared/hooks.ts
2022-05-10 18:10:20 +02:00

79 lines
1.9 KiB
TypeScript

import { useRef, useCallback, useMemo, useState } from 'react';
import { fire } from '@utils';
export function useDeferredSubmit(input?: HTMLInputElement): {
(callback: () => void): void;
done: () => void;
} {
const calledRef = useRef(false);
const awaitFormSubmit = useCallback(
(callback: () => void) => {
const form = input?.form;
if (!form) {
return;
}
const interceptFormSubmit = (event: Event) => {
event.preventDefault();
runCallback();
form.submit();
};
calledRef.current = false;
form.addEventListener('submit', interceptFormSubmit);
const runCallback = () => {
form.removeEventListener('submit', interceptFormSubmit);
clearTimeout(timer);
if (!calledRef.current) {
callback();
}
};
const timer = setTimeout(runCallback, 400);
},
[input]
);
const done = () => {
calledRef.current = true;
};
return Object.assign(awaitFormSubmit, { done });
}
export function groupId(id: string) {
return `#champ-${id.replace(/-input$/, '')}`;
}
export function useHiddenField(
group?: string,
name = 'value'
): [
value: string | undefined,
setValue: (value: string) => void,
input: HTMLInputElement | undefined
] {
const hiddenField = useMemo(
() => selectInputInGroup(group, name),
[group, name]
);
const [value, setValue] = useState(() => hiddenField?.value);
return [
value,
(value) => {
if (hiddenField) {
hiddenField.setAttribute('value', value);
setValue(value);
fire(hiddenField, 'change');
}
},
hiddenField ?? undefined
];
}
function selectInputInGroup(
group: string | undefined,
name: string
): HTMLInputElement | undefined | null {
if (group) {
return document.querySelector<HTMLInputElement>(
`${group} input[type="hidden"][name$="[${name}]"], ${group} input[type="hidden"][name="${name}"]`
);
}
}