expo-sensors/build/DeviceSensor.js

import { EventEmitter, Platform } from '@unimodules/core';
/**
 * A base class for subscribable sensors. The events emitted by this class are measurements
 * specified by the parameter type `M`.
 */
export default class DeviceSensor {
    constructor(nativeSensorModule, nativeEventName) {
        this._nativeModule = nativeSensorModule;
        this._nativeEmitter = new EventEmitter(nativeSensorModule);
        this._nativeEventName = nativeEventName;
        this._listenerCount = 0;
    }
    addListener(listener) {
        const subscription = this._nativeEmitter.addListener(this._nativeEventName, listener);
        subscription.remove = () => this.removeSubscription(subscription);
        this._listenerCount++;
        return subscription;
    }
    hasListeners() {
        return this._listenerCount > 0;
    }
    getListenerCount() {
        return this._listenerCount;
    }
    removeAllListeners() {
        this._listenerCount = 0;
        this._nativeEmitter.removeAllListeners(this._nativeEventName);
    }
    removeSubscription(subscription) {
        this._listenerCount--;
        this._nativeEmitter.removeSubscription(subscription);
    }
    setUpdateInterval(intervalMs) {
        if (!this._nativeModule.setUpdateInterval) {
            console.warn(`expo-sensors: setUpdateInterval() is not supported on ${Platform.OS}`);
        }
        else {
            this._nativeModule.setUpdateInterval(intervalMs);
        }
    }
    async isAvailableAsync() {
        if (!this._nativeModule.isAvailableAsync) {
            return false;
        }
        else {
            return await this._nativeModule.isAvailableAsync();
        }
    }
}
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