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/** Store page filters */
class initTopics {
constructor() {
this.selectElements();
this.togglePlaceholderContainer(true);
this.searchCache = window.location.search;
this._filters = this.getUrlFilters();
if (this._filters.q.length === 0 && this._filters.filter.length === 0) {
this.togglePlaceholderContainer();
this.toggleFeaturedContainer(true);
}
this.fetchTopicList()
.then((data) => {
this.allTopics = data.topics;
Iif (!this.allTopics) {
return;
}
this.groupAllTopics();
this.filterTopics();
this.handleFilterClick();
if (this._filters.q.length > 0 || this._filters.filter.length > 0) {
this.toggleFeaturedContainer(false);
this.renderTopics();
this.toggleTopicsContainer(true);
this.togglePlaceholderContainer();
}
if (this.topics.length === 0) {
this.toggleTopicsSection(false);
} else {
this.toggleTopicsSection(true);
}
})
.catch((e) => console.error(e));
}
fetchTopicList() {
if (this._filters.q) {
const queryUrl = this._filters.q.join(",");
return fetch(`/topics.json?q=${queryUrl}`).then((result) =>
result.json()
);
} else E{
return fetch("/topics.json").then((result) => result.json());
}
}
getUrlFilters() {
const filters = {};
if (window.location.search) {
const searchParams = new URLSearchParams(window.location.search);
for (const [filterType, filterValue] of searchParams) {
filters[filterType] = filterValue.split(",");
}
}
Eif (!filters.filter) {
filters.filter = [];
}
if (!filters.q) {
filters.q = [];
}
return filters;
}
selectElements() {
this.domEl = {};
this.domEl.categoryFilters = {
el: document.querySelectorAll(".category-filter"),
selector: ".category-filter",
};
this.domEl.topicsSection = {
el: document.querySelector("[data-js='topics-section']"),
selector: "[data-js='topics-section']",
};
this.domEl.placeholderContainer = {
el: document.querySelector("[data-js='topics-placeholder-container']"),
selector: "[data-js='topics-placeholder-container']",
};
this.domEl.topicsContainer = {
el: document.querySelector("[data-js='topics-container']"),
selector: "[data-js='topics-container']",
};
this.domEl.featuredContainer = {
el: document.querySelector("[data-js='featured-topics-container']"),
selector: "[data-js='featured-topics-container']",
};
}
handleFilterClick() {
if (this.domEl.categoryFilters.el) {
this.domEl.categoryFilters.el.forEach((categoryFilter) => {
categoryFilter.addEventListener("click", () => {
if (categoryFilter.checked) {
this._filters.filter.push(categoryFilter.value);
} else E{
this._filters.filter = this._filters.filter.filter(
(el) => el !== categoryFilter.value
);
}
this.filterTopics();
this.renderTopics();
this.toggleFeaturedContainer();
this.toggleTopicsContainer(true);
});
});
} else E{
throw new Error(
`There are no elements containing ${this.domEl.categoryFilters.selector} selector.`
);
}
}
groupAllTopics() {
this.groupedTopics = {
categories: {},
};
this.allTopics.forEach((entity) => {
Eif (entity.categories) {
entity.categories.forEach((cat) => {
Eif (!this.groupedTopics.categories[cat]) {
this.groupedTopics.categories[cat] = [];
}
this.groupedTopics.categories[cat].push(entity);
});
}
});
}
toggleTopicsSection(visibility) {
if (this.domEl.topicsSection.el) {
if (visibility) {
this.domEl.topicsSection.el.classList.remove("u-hide");
} else {
this.domEl.topicsSection.el.classList.add("u-hide");
}
} else E{
throw new Error(
`There is no element containing ${this.domEl.topicsSection.selector} selector.`
);
}
}
togglePlaceholderContainer(visibility) {
if (this.domEl.placeholderContainer.el) {
if (visibility) {
this.domEl.placeholderContainer.el.classList.remove("u-hide");
} else {
this.domEl.placeholderContainer.el.classList.add("u-hide");
}
} else E{
throw new Error(
`There is no element containing ${this.domEl.placeholderContainer.selector} selector.`
);
}
}
toggleTopicsContainer(visibility) {
if (this.domEl.topicsContainer.el) {
if (visibility) {
this.domEl.topicsContainer.el.classList.remove("u-hide");
} else E{
this.domEl.topicsContainer.el.classList.add("u-hide");
}
} else E{
throw new Error(
`There is no element containing ${this.domEl.topicsContainer.selector} selector.`
);
}
}
toggleFeaturedContainer(visibility) {
if (this.domEl.featuredContainer.el) {
if (visibility) {
this.domEl.featuredContainer.el.classList.remove("u-hide");
} else {
this.domEl.featuredContainer.el.classList.add("u-hide");
}
} else E{
throw new Error(
`There is no element containing ${this.domEl.featuredContainer.selector} selector.`
);
}
}
filterTopics() {
if (this._filters.filter.length === 0) {
this.topics = this.allTopics;
} else {
this.topics = this.allTopics.filter((entity) =>
this.filterTopicsByCategory(entity)
);
Eif (this.topics.length < 3) {
const bucketFillers = this.allTopics.reduce((acc, topic) => {
if (!this.topics.includes(topic)) {
acc.push(topic);
}
return acc;
}, []);
this.topics = this.topics.concat(bucketFillers);
}
}
}
filterTopicsByCategory(entity) {
let packageCategories = [];
if (entity.categories) {
packageCategories = entity.categories.map((cat) => {
return cat;
});
}
const cats = this._filters.filter.filter((cat) => {
if (packageCategories.includes(cat)) {
return cat;
}
});
if (cats.length) {
return entity;
}
}
renderTopics() {
Iif (!("content" in document.createElement("template"))) {
return;
}
if (this.domEl.topicsContainer.el) {
this.domEl.topicsContainer.el.innerHTML = "";
this.topics.slice(0, 3).forEach((entity) => {
const topicCard = buildTopicCard(entity);
if (topicCard) {
this.domEl.topicsContainer.el.appendChild(topicCard);
}
});
} else E{
throw new Error(
`There is no element containing ${this.domEl.topicsContainer.selector} selector.`
);
}
}
}
export { initTopics };
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