drive-detector/lib/drivedetector.js

Detect drives and changes in mounted drives.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const events_1 = require("events");
const DriveList = require("drivelist");
const equal = require("fast-deep-equal");
class DriveDetector extends events_1.EventEmitter {
    constructor() {
        super(...arguments);
        this.drives = [];
    }
    start(intervalMilliseconds = 5000) {
        this.interval = setInterval(this.checkDrives.bind(this), intervalMilliseconds);
        this.checkDrives();
    }
    stop() {
        clearInterval(this.interval);
        this.drives = [];
    }
    list() {
        return new Promise((resolve, reject) => {
            DriveList.list((err, drives) => {
                if (err) {
                    return reject(err);
                }
                resolve(drives);
            });
        });
    }
    checkDrives() {
        this.list()
            .then((detectedDrives) => {
            if (this.drives.length === 0) {
                this.emit('started', detectedDrives);
            }
            else {
                this.identifyMountedDrives(this.drives, detectedDrives)
                    .forEach(drive => this.emit('mounted', drive));
                this.identifyUnmountedDrives(this.drives, detectedDrives)
                    .forEach(drive => this.emit('unmounted', drive));
            }
            this.drives = detectedDrives;
        })
            .catch(err => this.emit('error', err));
    }
    identifyMountedDrives(currentList, newList) {
        return newList.filter(drive => !currentList.some(currentDrive => equal(drive, currentDrive)));
    }
    identifyUnmountedDrives(currentList, newList) {
        return currentList.filter(currentDrive => !newList.some(drive => equal(drive, currentDrive)));
    }
}
exports.default = DriveDetector;
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