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/* ldgallery - A static generator which turns a collection of tagged
-- pictures into a searchable web gallery.
--
-- Copyright (C) 2019-2022 Guillaume FOUET
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU Affero General Public License as
-- published by the Free Software Foundation, either version 3 of the
-- License, or (at your option) any later version.
--
-- This program 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 Affero General Public License for more details.
--
-- You should have received a copy of the GNU Affero General Public License
-- along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
import { Item, ItemSortStr } from '@/@types/gallery';
import i18n from '@/plugins/i18n';
import { isDirectory } from './itemGuards';
const { t } = i18n.global;
export type ItemComparator = (left: Item, right: Item) => number;
export type ItemSort = { name: ItemSortStr, text: string; fn: ItemComparator };
function _sortByPathAsc(left: Item, right: Item): number {
return left.path.localeCompare(right.path, undefined, {
sensitivity: 'base',
ignorePunctuation: true,
numeric: true,
});
}
function _sortByTitleAsc(left: Item, right: Item): number {
return left.title.localeCompare(right.title, undefined, {
sensitivity: 'base',
ignorePunctuation: true,
numeric: true,
});
}
function _sortByDateAsc(left: Item, right: Item): number {
return left.datetime.localeCompare(right.datetime); // TODO: handle timezones
}
function _sortDirectoryFirst(left: Item, right: Item): number {
const dLeft = isDirectory(left) ? 1 : 0;
const dRight = isDirectory(right) ? 1 : 0;
return dRight - dLeft;
}
function _reverse(fn: ItemComparator): ItemComparator {
return (l, r) => -fn(l, r);
}
function _chain(comparators: ItemComparator[]): ItemComparator {
return comparators.reduce((primary, tieBreaker) => (l, r) => {
const primaryComparison = primary(l, r);
return primaryComparison !== 0 ? primaryComparison : tieBreaker(l, r);
});
}
// ---
export const useItemComparator = () => {
const ITEM_SORTS: ItemSort[] = [
{
name: 'title_asc',
text: t('command.sort.byTitleAsc'),
fn: _chain([_sortDirectoryFirst, _sortByTitleAsc, _sortByPathAsc]),
},
{
name: 'date_asc',
text: t('command.sort.byDateAsc'),
fn: _chain([_sortDirectoryFirst, _sortByDateAsc, _sortByPathAsc]),
},
{
name: 'date_desc',
text: t('command.sort.byDateDesc'),
fn: _chain([_sortDirectoryFirst, _reverse(_sortByDateAsc), _sortByPathAsc]),
},
];
const DEFAULT = ITEM_SORTS[2]; // date_desc
return {
ITEM_SORTS,
DEFAULT,
};
};
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