"use strict";
/**
 * Copyright (c) 2018-present, Ephox, Inc.
 *
 * This source code is licensed under the Apache 2 license found in the
 * LICENSE file in the root directory of this source tree.
 *
 */
Object.defineProperty(exports, "__esModule", { value: true });
var Utils_1 = require("./Utils");
var injectScriptTag = function (scriptId, doc, url, callback) {
    var scriptTag = doc.createElement('script');
    scriptTag.type = 'application/javascript';
    scriptTag.id = scriptId;
    scriptTag.addEventListener('load', callback);
    scriptTag.src = url;
    if (doc.head) {
        doc.head.appendChild(scriptTag);
    }
};
exports.create = function () {
    return {
        listeners: [],
        scriptId: Utils_1.uuid('tiny-script'),
        scriptLoaded: false
    };
};
exports.load = function (state, doc, url, callback) {
    if (state.scriptLoaded) {
        callback();
    }
    else {
        state.listeners.push(callback);
        if (!doc.getElementById(state.scriptId)) {
            injectScriptTag(state.scriptId, doc, url, function () {
                state.listeners.forEach(function (fn) { return fn(); });
                state.scriptLoaded = true;
            });
        }
    }
};