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/**
Toggles the expanded/collapsed classed on side navigation element.
@param {HTMLElement} sideNavigation The side navigation element.
@param {Boolean} show Whether to show or hide the drawer.
*/
function toggleDrawer(sideNavigation: HTMLElement, show: boolean) {
Eif (sideNavigation) {
if (show) {
sideNavigation.classList.remove("is-collapsed");
sideNavigation.classList.add("is-expanded");
} else {
sideNavigation.classList.remove("is-expanded");
sideNavigation.classList.add("is-collapsed");
}
}
}
/**
Attaches event listeners for the side navigation toggles
@param {HTMLElement} sideNavigation The side navigation element.
*/
function setupSideNavigation(sideNavigation: HTMLElement) {
const toggles: HTMLElement[] = [].slice.call(
sideNavigation.querySelectorAll(".js-drawer-toggle")
);
toggles.forEach(function (toggle) {
toggle.addEventListener("click", function (event) {
event.preventDefault();
const sideNav = document.getElementById(
toggle.getAttribute("aria-controls") || ""
);
if (sideNav) {
toggleDrawer(sideNav, !sideNav.classList.contains("is-expanded"));
}
});
});
}
/**
Attaches event listeners for all the side navigations in the document.
@param {String} sideNavigationSelector The CSS selector matching side navigation elements.
*/
function setupSideNavigations(sideNavigationSelector: string) {
// Setup all side navigations on the page.
const sideNavigations = [].slice.call(
document.querySelectorAll(sideNavigationSelector)
);
sideNavigations.forEach(setupSideNavigation);
}
function initFilters() {
const urlParams = new URLSearchParams(window.location.search);
const checkboxes: HTMLInputElement[] = [].slice.call(
document.querySelectorAll("[data-js='filter']")
);
const topics: HTMLElement[] = [].slice.call(
document.querySelectorAll("[data-js='item']")
);
const closeFiltersButtonMobile = document.querySelector(
"[data-js='filter-button-mobile-close']"
) as HTMLElement;
let filters: string[] = [];
Iif (urlParams.get("filters")) {
filters = urlParams.get("filters")?.split(",") ?? [];
}
populateCheckboxes();
filterDom();
checkboxes.forEach(function (checkbox) {
checkbox.addEventListener("change", filterHandler);
});
// Check any checkboxes that match URL filters query
function populateCheckboxes() {
// Create a list of topics values
// Dedupe with a set and convert back to an array
const topicValues = Array.from(
new Set(
topics.flatMap(function (topic: HTMLElement) {
return topic.dataset.filter?.split(",");
})
)
);
checkboxes.forEach(function (checkbox) {
const value = checkbox.value;
if (!topicValues.includes(value)) {
checkbox.setAttribute("disabled", "disabled");
}
});
Eif (filters) {
filters.forEach(function (filter) {
const selector = "[aria-labelledby='" + filter + "-filter']";
const checkboxObject = document.querySelector(
selector
) as HTMLInputElement;
if (checkboxObject) {
const checkboxDisabled = checkboxObject.getAttribute("disabled");
if (checkboxDisabled) {
removeFilter(filter);
} else {
checkboxObject.checked = true;
}
}
});
}
}
// Check if element should be filtered
function filterCheck(filterText: string) {
const match = false;
return !!filters.find(function (filter) {
return filterText.includes(filter) && !match;
});
}
function filterDom() {
if (filters.length === 0 && topics) {
closeFiltersButtonMobile.innerHTML = "Hide filters";
topics.forEach(function (topic) {
topic.classList.remove("u-hide");
});
} else Eif (topics) {
closeFiltersButtonMobile.innerHTML = "Apply filters";
topics.forEach(function (topic) {
const filterText = topic.getAttribute("data-filter");
if (filterText && filterCheck(filterText)) {
topic.classList.remove("u-hide");
} else {
topic.classList.add("u-hide");
}
});
}
}
function updateUrl() {
const currentUrl = window.location.href;
const baseUrl = currentUrl.split("?")[0];
let newUrl = baseUrl;
if (filters.length > 0) {
let filtersString = "";
filters.forEach(function (filter, i) {
if (i === filters.length - 1) {
filtersString = filtersString + filter;
} else {
filtersString = filtersString + filter + ",";
}
});
newUrl = baseUrl + "?filters=" + filtersString;
window.history.pushState({ filters: filters }, "", newUrl);
} else {
window.history.pushState({}, "", newUrl);
}
}
function addFilter(filter: string) {
filters.push(filter);
filterDom();
updateUrl();
}
function removeFilter(filter: string) {
filters.splice(filters.indexOf(filter), 1);
filterDom();
updateUrl();
}
function filterHandler(e: Event) {
const target = e.target as HTMLInputElement;
if (target.checked) {
addFilter(target.value);
} else {
removeFilter(target.value);
}
}
}
setupSideNavigations('.p-side-navigation, [class*="p-side-navigation--"]');
initFilters();
return {
toggleDrawer,
};
}
export { initTopicFilters };
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