js-uploader/dist/esm/uploader/modules/EventEmitter.js

A JavaScript library for file upload

import { __read, __spread } from "tslib";
import { Subject } from 'rxjs';
import { filter } from 'rxjs/operators';
var EventEmitter = /** @class */ (function () {
    function EventEmitter() {
        this.eventSubject = new Subject();
        this.listenerMap = new Map();
    }
    EventEmitter.prototype.on = function (type, listener) {
        this.addListener(type, listener);
    };
    EventEmitter.prototype.once = function (type, listener) {
        this.addListener(type, listener, true);
    };
    EventEmitter.prototype.off = function (type, listener) {
        this.removeListener(type, listener);
    };
    EventEmitter.prototype.emit = function (type) {
        var data = [];
        for (var _i = 1; _i < arguments.length; _i++) {
            data[_i - 1] = arguments[_i];
        }
        type && this.eventSubject.next({ type: type, data: data });
    };
    EventEmitter.prototype.addListener = function (type, listener, once) {
        var _this = this;
        var list = this.getSubscriptionList(type);
        list.some(function (i) { return i.listener === listener; }) && this.off(type, listener);
        var subscription = this.eventSubject.pipe(filter(function (e) { return e.type === type; })).subscribe({
            next: function (e) {
                once && _this.off(type, listener);
                listener.apply(void 0, __spread((e.data || [])));
            },
        });
        list.push({ listener: listener, subscription: subscription });
    };
    EventEmitter.prototype.removeListener = function (type, listener) {
        var _a;
        var list = this.getSubscriptionList(type);
        if (listener) {
            var index = list.findIndex(function (i) { return i.listener === listener; });
            index > -1 && ((_a = list.splice(index, 1)[0].subscription) === null || _a === void 0 ? void 0 : _a.unsubscribe());
        }
        else {
            list.splice(0, list.length).forEach(function (i) { var _a; return (_a = i.subscription) === null || _a === void 0 ? void 0 : _a.unsubscribe(); });
        }
    };
    EventEmitter.prototype.getSubscriptionList = function (evtType) {
        var list = this.listenerMap.get(evtType) || [];
        !this.listenerMap.has(evtType) && this.listenerMap.set(evtType, list);
        return list;
    };
    return EventEmitter;
}());
export { EventEmitter };
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