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/**
* Object containing a message for the notification banner
*/
class BannerItem {
/**
* Creates new Banner Message Items
* @param {String} name Name the message will be referenced under
* @param {String} content Content, either formatted as plain text or html
* @param {Boolean} html Is content formatted as html?
*/
constructor(name, content, html) {
this.name = name;
this.content = content;
this.html = html;
}
}
/**
* Class for controlling the Notification banner
*/
export default class BannerController {
/**
* Creates references to objects and hides notification banner
* @param {Interface} iface Interface to receive comm. from
* @param {string} bannerId ID of Notification Banner
* @param {string} textP ID of Notification Banner text field
* @param {string} dismissBtn ID of dismiss button
* @param {string} badge ID of badge (# of notifications)
*/
constructor(iface, bannerId, textP, dismissBtn, badge) {
iface.addObject(this, 'notifications', ['show', 'hide']);
this.iface = iface;
this.ids = {bannerId, textP, dismissBtn, badge};
}
/**
* Initializes the Banner in the DOM
*/
initialize() {
this.banner = document.getElementById(this.ids.bannerId);
this.bannerText = document.getElementById(this.ids.textP);
this.dismissBtn = document.getElementById(this.ids.dismissBtn);
this.notificationBadge = document.getElementById(this.ids.badge);
this.bannerMsgs = [];
this.banner.classList.add('hidden'); // Hide banner by default
this.registerEvents();
}
/**
* Registers events for notification banner
*/
registerEvents() {
this.registerDismissEvent();
}
/**
* Registers dismissing via dismiss button
*/
registerDismissEvent() {
this.dismissBtn.addEventListener('click', () => {
this.dismissCurrent();
});
}
/**
* Pushes a new message to the notification banner and shows it
* @param {string} name Name to register notification (referenced in hide)
* @param {string} text Notification text
*/
show(name, text) {
let bannerItem = new BannerItem(name, text, false);
this.bannerMsgs.push(bannerItem);
this.update();
}
/**
* Removes notification from banner
* @param {string} name The name the notification was registered under
*/
hide(name) {
if (name) this.bannerMsgs = this.bannerMsgs.filter(elt => elt.name != name);
else this.bannerMsgs = [];
this.update();
}
/**
* Dismisses the currently shown message
*/
dismissCurrent() {
this.hide(this.current);
}
/**
* Updates the notification banner with the most recent message
*/
update() {
if (this.bannerMsgs.length === 0) {
this.banner.classList.add('hidden');
return;
}
const lastNotification = this.bannerMsgs[this.bannerMsgs.length - 1];
const name = lastNotification.name;
const text = lastNotification.content;
const isHtml = lastNotification.html;
this.banner.classList.remove('hidden');
if (isHtml) this.bannerText.innerHTML = text;
else this.bannerText.innerText = text;
this.current = name;
this.updateNotificationBadge();
}
/**
* Updates the notification badge number
*/
updateNotificationBadge() {
if (this.bannerMsgs.length < 2) {
this.notificationBadge.classList.add('hidden');
} else if (this.bannerMsgs.length > 9) {
this.notificationBadge.classList.remove('hidden');
this.notificationBadge.textContent = '∞';
} else {
this.notificationBadge.classList.remove('hidden');
this.notificationBadge.textContent = this.bannerMsgs.length.toString();
}
}
}
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