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@@ -15,15 +15,54 @@
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* along with Threema Web. If not, see <http://www.gnu.org/licenses/>.
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*/
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+import {NotificationService} from './notification';
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+
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export class BatteryStatusService {
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// Attributes
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private batteryStatus: threema.BatteryStatus = null;
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+ private alertedLow = false;
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+ private alertedCritical = false;
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+
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+ // Constants
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+ private static readonly PERCENT_LOW = 20;
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+ private static readonly PERCENT_CRITICAL = 5;
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+
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+ // Services
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+ private $translate: ng.translate.ITranslateService;
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+ private notificationService: NotificationService;
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+
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+ public static $inject = ['$translate', 'NotificationService'];
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+
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+ constructor($translate: ng.translate.ITranslateService, notificationService: NotificationService) {
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+ this.$translate = $translate;
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+ this.notificationService = notificationService;
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+ }
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/**
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* Update the battery status.
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*/
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public setStatus(batteryStatus: threema.BatteryStatus): void {
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this.batteryStatus = batteryStatus;
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+
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+ // Alert if percent drops below a certain threshold
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+ if (!this.alertedCritical && batteryStatus.percent < BatteryStatusService.PERCENT_CRITICAL) {
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+ this.notifyLevel('critical');
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+ this.alertedCritical = true;
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+ } else if (!this.alertedLow && batteryStatus.percent < BatteryStatusService.PERCENT_LOW) {
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+ this.notifyLevel('low');
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+ this.alertedLow = true;
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+ }
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+
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+ // Reset alert flag if percentage goes above a certain threshold
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+ const hysteresis = 3;
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+ if (this.alertedLow && batteryStatus.percent > BatteryStatusService.PERCENT_LOW + hysteresis) {
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+ this.alertedLow = false;
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+ this.notificationService.hideNotification('battery-low');
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+ }
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+ if (this.alertedCritical && batteryStatus.percent > BatteryStatusService.PERCENT_CRITICAL + hysteresis) {
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+ this.alertedCritical = false;
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+ this.notificationService.hideNotification('battery-critical');
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+ }
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}
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/**
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@@ -47,6 +86,49 @@ export class BatteryStatusService {
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return this.batteryStatus.isCharging;
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}
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+ /**
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+ * Return whether the battery level is low (<20%).
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+ */
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+ public get isLow(): boolean {
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+ return this.batteryStatus.percent < BatteryStatusService.PERCENT_LOW;
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+ }
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+
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+ /**
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+ * Return whether the battery level is critical (<20%).
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+ */
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+ public get isCritical(): boolean {
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+ return this.batteryStatus.percent < BatteryStatusService.PERCENT_CRITICAL;
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+ }
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+
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+ /**
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+ * Alert the user about a certain battery level.
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+ */
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+ private notifyLevel(level: 'low' | 'critical'): void {
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+ if (!this.notificationService.getWantsNotifications()) {
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+ // User does not want notifications.
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+ // This flag is also checked in the `showNotification` function, but
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+ // we'll return early to avoid having to do the translations and to
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+ // keep the notification sound from playing without a visible
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+ // notification.
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+ return;
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+ }
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+
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+ const title = this.$translate.instant('common.WARNING');
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+ const avatar = 'img/ic_battery_alert-64x64.png';
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+ let tag: string;
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+ let body: string;
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+ if (level === 'low') {
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+ tag = 'battery-low';
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+ body = this.$translate.instant('battery.LEVEL_LOW', { percent: this.percent });
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+ this.notificationService.hideNotification('battery-critical');
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+ } else if (level === 'critical') {
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+ tag = 'battery-critical';
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+ body = this.$translate.instant('battery.LEVEL_CRITICAL', { percent: this.percent });
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+ this.notificationService.hideNotification('battery-low');
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+ }
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+ this.notificationService.showNotification(tag, title, body, avatar, undefined, true, true);
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+ }
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+
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public toString(): string {
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if (this.batteryStatus === null) {
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return 'No data';
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Danilo Bargen
