BookStack/resources/js/components/entity-selector.js

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JavaScript
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import {onChildEvent} from "../services/dom";
/**
* Entity Selector
* @extends {Component}
*/
class EntitySelector {
setup() {
this.elem = this.$el;
this.entityTypes = this.$opts.entityTypes || 'page,book,chapter';
this.entityPermission = this.$opts.entityPermission || 'view';
this.input = this.$refs.input;
this.searchInput = this.$refs.search;
this.loading = this.$refs.loading;
this.resultsContainer = this.$refs.results;
this.addButton = this.$refs.add;
this.search = '';
this.lastClick = 0;
this.selectedItemData = null;
this.setupListeners();
this.showLoading();
this.initialLoad();
}
setupListeners() {
this.elem.addEventListener('click', this.onClick.bind(this));
let lastSearch = 0;
this.searchInput.addEventListener('input', event => {
lastSearch = Date.now();
this.showLoading();
setTimeout(() => {
if (Date.now() - lastSearch < 199) return;
this.searchEntities(this.searchInput.value);
}, 200);
});
this.searchInput.addEventListener('keydown', event => {
if (event.keyCode === 13) event.preventDefault();
});
if (this.addButton) {
this.addButton.addEventListener('click', event => {
if (this.selectedItemData) {
this.confirmSelection(this.selectedItemData);
this.unselectAll();
}
});
}
// Keyboard navigation
onChildEvent(this.$el, '[data-entity-type]', 'keydown', (e, el) => {
if (e.ctrlKey && e.code === 'Enter') {
const form = this.$el.closest('form');
if (form) {
form.submit();
e.preventDefault();
return;
}
}
if (e.code === 'ArrowDown') {
this.focusAdjacent(true);
}
if (e.code === 'ArrowUp') {
this.focusAdjacent(false);
}
});
this.searchInput.addEventListener('keydown', e => {
if (e.code === 'ArrowDown') {
this.focusAdjacent(true);
}
})
}
focusAdjacent(forward = true) {
const items = Array.from(this.resultsContainer.querySelectorAll('[data-entity-type]'));
const selectedIndex = items.indexOf(document.activeElement);
const newItem = items[selectedIndex+ (forward ? 1 : -1)] || items[0];
if (newItem) {
newItem.focus();
}
}
reset() {
this.searchInput.value = '';
this.showLoading();
this.initialLoad();
}
focusSearch() {
this.searchInput.focus();
}
showLoading() {
this.loading.style.display = 'block';
this.resultsContainer.style.display = 'none';
}
hideLoading() {
this.loading.style.display = 'none';
this.resultsContainer.style.display = 'block';
}
initialLoad() {
window.$http.get(this.searchUrl()).then(resp => {
this.resultsContainer.innerHTML = resp.data;
this.hideLoading();
})
}
searchUrl() {
return `/ajax/search/entities?types=${encodeURIComponent(this.entityTypes)}&permission=${encodeURIComponent(this.entityPermission)}`;
}
searchEntities(searchTerm) {
this.input.value = '';
const url = `${this.searchUrl()}&term=${encodeURIComponent(searchTerm)}`;
window.$http.get(url).then(resp => {
this.resultsContainer.innerHTML = resp.data;
this.hideLoading();
});
}
isDoubleClick() {
const now = Date.now();
const answer = now - this.lastClick < 300;
this.lastClick = now;
return answer;
}
onClick(event) {
const listItem = event.target.closest('[data-entity-type]');
if (listItem) {
event.preventDefault();
event.stopPropagation();
this.selectItem(listItem);
}
}
selectItem(item) {
const isDblClick = this.isDoubleClick();
const type = item.getAttribute('data-entity-type');
const id = item.getAttribute('data-entity-id');
const isSelected = (!item.classList.contains('selected') || isDblClick);
this.unselectAll();
this.input.value = isSelected ? `${type}:${id}` : '';
const link = item.getAttribute('href');
const name = item.querySelector('.entity-list-item-name').textContent;
const data = {id: Number(id), name: name, link: link};
if (isSelected) {
item.classList.add('selected');
this.selectedItemData = data;
} else {
window.$events.emit('entity-select-change', null)
}
if (!isDblClick && !isSelected) return;
if (isDblClick) {
this.confirmSelection(data);
}
if (isSelected) {
window.$events.emit('entity-select-change', data)
}
}
confirmSelection(data) {
window.$events.emit('entity-select-confirm', data);
}
unselectAll() {
const selected = this.elem.querySelectorAll('.selected');
for (const selectedElem of selected) {
selectedElem.classList.remove('selected', 'primary-background');
}
this.selectedItemData = null;
}
}
export default EntitySelector;