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/* ldgallery - A static generator which turns a collection of tagged
-- pictures into a searchable web gallery.
--
-- Copyright (C) 2019-2020 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 { TranslateResult } from "vue-i18n";
import i18n from "@/plugins/i18n";
export type ItemComparator = (left: Gallery.Item, right: Gallery.Item) => number;
export type ItemSort = { text: TranslateResult; fn: ItemComparator };
export default class ItemComparators {
static readonly ITEM_SORTS: Record<Gallery.ItemSortStr, ItemSort> = {
title_asc: {
text: i18n.t("command.sort.byTitleAsc"),
fn: ItemComparators.chain(ItemComparators.sortByTitleAsc, ItemComparators.sortByPathAsc),
},
date_asc: {
text: i18n.t("command.sort.byDateAsc"),
fn: ItemComparators.chain(ItemComparators.sortByDateAsc, ItemComparators.sortByPathAsc),
},
date_desc: {
text: i18n.t("command.sort.byDateDesc"),
fn: ItemComparators.reverse(ItemComparators.chain(ItemComparators.sortByDateAsc, ItemComparators.sortByPathAsc)),
},
};
static readonly DEFAULT = ItemComparators.ITEM_SORTS.date_asc;
static sortByPathAsc(left: Gallery.Item, right: Gallery.Item): number {
return left.path.localeCompare(right.path, undefined, {
sensitivity: "base",
ignorePunctuation: true,
numeric: true,
});
}
static sortByTitleAsc(left: Gallery.Item, right: Gallery.Item): number {
return left.title.localeCompare(right.title, undefined, {
sensitivity: "base",
ignorePunctuation: true,
numeric: true,
});
}
static sortByDateAsc(left: Gallery.Item, right: Gallery.Item): number {
return left.datetime.localeCompare(right.datetime); // TODO: handle timezones
}
static reverse(fn: ItemComparator): ItemComparator {
return (l, r) => -fn(l, r);
}
static chain(primary: ItemComparator, tieBreaker: ItemComparator): ItemComparator {
return (l, r) => {
const primaryComparison = primary(l, r);
return primaryComparison !== 0 ? primaryComparison : tieBreaker(l, r);
};
}
}
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