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93 lines
2.2 KiB
TypeScript
93 lines
2.2 KiB
TypeScript
/*
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GoToSocial
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Copyright (C) GoToSocial Authors admin@gotosocial.org
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SPDX-License-Identifier: AGPL-3.0-or-later
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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import { useRef, useMemo } from "react";
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import type {
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CreateHookNames,
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HookOpts,
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ArrayInputHook,
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HookedForm,
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} from "./types";
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import getFormMutations from "./get-form-mutations";
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function parseFields(entries: HookedForm[], length: number): HookedForm[] {
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const fields: HookedForm[] = [];
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for (let i = 0; i < length; i++) {
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if (entries[i] != undefined) {
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fields[i] = Object.assign({}, entries[i]);
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} else {
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fields[i] = {};
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}
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}
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return fields;
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}
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export default function useArrayInput(
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{ name }: CreateHookNames,
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{
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initialValue,
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length = 0,
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}: HookOpts,
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): ArrayInputHook {
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const _default: HookedForm[] = Array(length);
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const fields = useRef<HookedForm[]>(_default);
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const value = useMemo(
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() => parseFields(initialValue, length),
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[initialValue, length],
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);
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function hasUpdate() {
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return Object.values(fields.current).some((fieldSet) => {
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const { updatedFields } = getFormMutations(fieldSet, { changedOnly: true });
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return updatedFields.length > 0;
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});
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}
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return {
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_default,
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name,
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Name: "",
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value,
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ctx: fields.current,
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maxLength: length,
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hasChanged: hasUpdate,
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selectedValues() {
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if (hasUpdate()) {
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return Object.values(fields.current)
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// Extract all form fields.
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.flatMap((fieldSet) => {
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return getFormMutations(
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fieldSet,
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{ changedOnly: false },
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).updatedFields;
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})
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// Get just value from each
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// field, discarding name.
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.map((field) => field.value);
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} else {
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return [];
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}
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}
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};
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}
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