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172 lines
5.5 KiB
JavaScript
172 lines
5.5 KiB
JavaScript
import _ from 'lodash';
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import { NamedPage } from 'vj/misc/PageLoader';
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import Dropdown from 'vj/components/dropdown/Dropdown';
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import pjax from 'vj/utils/pjax';
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import substitute from 'vj/utils/substitute';
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const categories = {};
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const dirtyCategories = [];
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const selections = [];
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function setDomSelected($dom, selected) {
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if (selected) {
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$dom.addClass('selected');
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} else {
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$dom.removeClass('selected');
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}
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}
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async function updateSelection(sendRequest = true) {
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dirtyCategories.forEach(({ type, category, subcategory }) => {
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let item = categories[category];
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const isSelected = item.select || _.some(item.children, (c) => c.select);
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setDomSelected(item.$tag, isSelected);
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if (isSelected) {
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selections.push(category);
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} else {
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_.pull(selections, category);
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}
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if (type === 'subcategory') {
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item = categories[category].children[subcategory];
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setDomSelected(item.$tag, item.select);
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const selectionName = `${category},${subcategory}`;
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if (item.select) {
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selections.push(selectionName);
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} else {
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_.pull(selections, selectionName);
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}
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}
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});
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dirtyCategories.length = 0;
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if (sendRequest) {
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// a list of categories which subcategory is selected
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const requestCategoryTags = _.uniq(selections
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.filter((s) => s.indexOf(',') !== -1)
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.map((s) => s.split(',')[0]));
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// drop the category if its subcategory is selected
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const requestTags = _.uniq(_.pullAll(selections, requestCategoryTags));
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let url;
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if (requestTags.length === 0) {
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url = Context.getProblemUrlWithoutCategory;
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} else {
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url = substitute(decodeURIComponent(Context.getProblemUrlWithCategory), {
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category: requestTags
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.map((tag) => tag.split(',').map(encodeURIComponent).join(','))
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.join('+'), // build a beautiful URL
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});
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}
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pjax.request({ url });
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}
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}
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function buildCategoryFilter() {
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const $container = $('[data-widget-cf-container]');
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if (!$container) {
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return;
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}
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$container.attr('class', 'widget--category-filter row small-up-3 medium-up-2');
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$container.children('li').get().forEach((category) => {
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const $category = $(category)
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.attr('class', 'widget--category-filter__category column');
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const $categoryTag = $category
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.find('.section__title a')
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.remove()
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.attr('class', 'widget--category-filter__category-tag');
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const categoryText = $categoryTag.text();
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const $drop = $category
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.children('.chip-list')
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.remove()
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.attr('class', 'widget--category-filter__drop');
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const treeItem = {
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select: false,
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$tag: $categoryTag,
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children: {},
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};
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categories[categoryText] = treeItem;
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$category.empty().append($categoryTag);
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if ($drop.length > 0) {
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$categoryTag.text(`${$categoryTag.text()}`);
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const $subCategoryTags = $drop
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.children('li')
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.attr('class', 'widget--category-filter__subcategory')
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.find('a')
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.attr('class', 'widget--category-filter__subcategory-tag')
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.attr('data-category', categoryText);
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$subCategoryTags.get().forEach((subCategoryTag) => {
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const $tag = $(subCategoryTag);
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treeItem.children[$tag.text()] = {
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select: false,
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$tag,
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};
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});
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Dropdown.getOrConstruct($categoryTag, {
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target: $drop[0],
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position: 'left center',
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});
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}
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});
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$(document).on('click', '.widget--category-filter__category-tag', (ev) => {
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if (ev.shiftKey || ev.metaKey || ev.ctrlKey) {
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return;
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}
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const category = $(ev.currentTarget).text();
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const treeItem = categories[category];
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// the effect should be cancelSelect if it is shown as selected when clicking
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const shouldSelect = treeItem.$tag.hasClass('selected') ? false : !treeItem.select;
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treeItem.select = shouldSelect;
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dirtyCategories.push({ type: 'category', category });
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if (!shouldSelect) {
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// de-select children
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_.forEach(treeItem.children, (treeSubItem, subcategory) => {
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if (treeSubItem.select) {
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treeSubItem.select = false; // eslint-disable-line no-param-reassign
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dirtyCategories.push({ type: 'subcategory', subcategory, category });
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}
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});
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}
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updateSelection();
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ev.preventDefault();
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});
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$(document).on('click', '.widget--category-filter__subcategory-tag', (ev) => {
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if (ev.shiftKey || ev.metaKey || ev.ctrlKey) {
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return;
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}
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const subcategory = $(ev.currentTarget).text();
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const category = $(ev.currentTarget).attr('data-category');
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const treeItem = categories[category].children[subcategory];
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treeItem.select = !treeItem.select;
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dirtyCategories.push({ type: 'subcategory', subcategory, category });
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updateSelection();
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ev.preventDefault();
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});
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}
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function parseCategorySelection() {
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Context.currentCategory.split(' ').forEach((cline) => {
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const [category, subcategory] = cline.split(',');
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if (!categories[category]) {
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return;
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}
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if (subcategory && !categories[category].children[subcategory]) {
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return;
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}
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if (!subcategory) {
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categories[category].select = true;
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dirtyCategories.push({ type: 'category', category });
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} else {
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categories[category].children[subcategory].select = true;
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dirtyCategories.push({ type: 'subcategory', subcategory, category });
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}
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});
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updateSelection(false);
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}
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const page = new NamedPage(['problem_main', 'problem_category'], () => {
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buildCategoryFilter();
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parseCategorySelection();
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});
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export default page;
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