(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
    typeof define === 'function' && define.amd ? define(['exports'], factory) :
    (factory((global.fileSelector = {})));
}(this, (function (exports) { 'use strict';

    /*! *****************************************************************************
    Copyright (c) Microsoft Corporation. All rights reserved.
    Licensed under the Apache License, Version 2.0 (the "License"); you may not use
    this file except in compliance with the License. You may obtain a copy of the
    License at http://www.apache.org/licenses/LICENSE-2.0

    THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
    WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
    MERCHANTABLITY OR NON-INFRINGEMENT.

    See the Apache Version 2.0 License for specific language governing permissions
    and limitations under the License.
    ***************************************************************************** */

    function __awaiter(thisArg, _arguments, P, generator) {
        return new (P || (P = Promise))(function (resolve, reject) {
            function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
            function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
            function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
            step((generator = generator.apply(thisArg, _arguments || [])).next());
        });
    }

    function __generator(thisArg, body) {
        var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
        return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
        function verb(n) { return function (v) { return step([n, v]); }; }
        function step(op) {
            if (f) throw new TypeError("Generator is already executing.");
            while (_) try {
                if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
                if (y = 0, t) op = [op[0] & 2, t.value];
                switch (op[0]) {
                    case 0: case 1: t = op; break;
                    case 4: _.label++; return { value: op[1], done: false };
                    case 5: _.label++; y = op[1]; op = [0]; continue;
                    case 7: op = _.ops.pop(); _.trys.pop(); continue;
                    default:
                        if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                        if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
                        if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
                        if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
                        if (t[2]) _.ops.pop();
                        _.trys.pop(); continue;
                }
                op = body.call(thisArg, _);
            } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
            if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
        }
    }

    function __read(o, n) {
        var m = typeof Symbol === "function" && o[Symbol.iterator];
        if (!m) return o;
        var i = m.call(o), r, ar = [], e;
        try {
            while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
        }
        catch (error) { e = { error: error }; }
        finally {
            try {
                if (r && !r.done && (m = i["return"])) m.call(i);
            }
            finally { if (e) throw e.error; }
        }
        return ar;
    }

    function __spread() {
        for (var ar = [], i = 0; i < arguments.length; i++)
            ar = ar.concat(__read(arguments[i]));
        return ar;
    }

    var COMMON_MIME_TYPES = new Map([
        ['avi', 'video/avi'],
        ['gif', 'image/gif'],
        ['ico', 'image/x-icon'],
        ['jpeg', 'image/jpeg'],
        ['jpg', 'image/jpeg'],
        ['mkv', 'video/x-matroska'],
        ['mov', 'video/quicktime'],
        ['mp4', 'video/mp4'],
        ['pdf', 'application/pdf'],
        ['png', 'image/png'],
        ['zip', 'application/zip'],
        ['doc', 'application/msword'],
        ['docx', 'application/vnd.openxmlformats-officedocument.wordprocessingml.document']
    ]);
    function toFileWithPath(file, path) {
        var f = withMimeType(file);
        if (typeof f.path !== 'string') { // on electron, path is already set to the absolute path
            var webkitRelativePath = file.webkitRelativePath;
            Object.defineProperty(f, 'path', {
                value: typeof path === 'string'
                    ? path
                    // If <input webkitdirectory> is set,
                    // the File will have a {webkitRelativePath} property
                    // https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement/webkitdirectory
                    : typeof webkitRelativePath === 'string' && webkitRelativePath.length > 0
                        ? webkitRelativePath
                        : file.name,
                writable: false,
                configurable: false,
                enumerable: true
            });
        }
        return f;
    }
    function withMimeType(file) {
        var name = file.name;
        var hasExtension = name && name.lastIndexOf('.') !== -1;
        if (hasExtension && !file.type) {
            var ext = name.split('.')
                .pop().toLowerCase();
            var type = COMMON_MIME_TYPES.get(ext);
            if (type) {
                Object.defineProperty(file, 'type', {
                    value: type,
                    writable: false,
                    configurable: false,
                    enumerable: true
                });
            }
        }
        return file;
    }

    var FILES_TO_IGNORE = [
        // Thumbnail cache files for macOS and Windows
        '.DS_Store',
        'Thumbs.db' // Windows
    ];
    /**
     * Convert a DragEvent's DataTrasfer object to a list of File objects
     * NOTE: If some of the items are folders,
     * everything will be flattened and placed in the same list but the paths will be kept as a {path} property.
     * @param evt
     */
    function fromEvent(evt) {
        return __awaiter(this, void 0, void 0, function () {
            return __generator(this, function (_a) {
                return [2 /*return*/, isDragEvt(evt) && evt.dataTransfer
                        ? getDataTransferFiles(evt.dataTransfer, evt.type)
                        : getInputFiles(evt)];
            });
        });
    }
    function isDragEvt(value) {
        return !!value.dataTransfer;
    }
    function getInputFiles(evt) {
        var files = isInput(evt.target)
            ? evt.target.files
                ? fromList(evt.target.files)
                : []
            : [];
        return files.map(function (file) { return toFileWithPath(file); });
    }
    function isInput(value) {
        return value !== null;
    }
    function getDataTransferFiles(dt, type) {
        return __awaiter(this, void 0, void 0, function () {
            var items, files;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        if (!dt.items) return [3 /*break*/, 2];
                        items = fromList(dt.items)
                            .filter(function (item) { return item.kind === 'file'; });
                        // According to https://html.spec.whatwg.org/multipage/dnd.html#dndevents,
                        // only 'dragstart' and 'drop' has access to the data (source node)
                        if (type !== 'drop') {
                            return [2 /*return*/, items];
                        }
                        return [4 /*yield*/, Promise.all(items.map(toFilePromises))];
                    case 1:
                        files = _a.sent();
                        return [2 /*return*/, noIgnoredFiles(flatten(files))];
                    case 2: return [2 /*return*/, noIgnoredFiles(fromList(dt.files)
                            .map(function (file) { return toFileWithPath(file); }))];
                }
            });
        });
    }
    function noIgnoredFiles(files) {
        return files.filter(function (file) { return FILES_TO_IGNORE.indexOf(file.name) === -1; });
    }
    // IE11 does not support Array.from()
    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/from#Browser_compatibility
    // https://developer.mozilla.org/en-US/docs/Web/API/FileList
    // https://developer.mozilla.org/en-US/docs/Web/API/DataTransferItemList
    function fromList(items) {
        var files = [];
        // tslint:disable: prefer-for-of
        for (var i = 0; i < items.length; i++) {
            var file = items[i];
            files.push(file);
        }
        return files;
    }
    // https://developer.mozilla.org/en-US/docs/Web/API/DataTransferItem
    function toFilePromises(item) {
        if (typeof item.webkitGetAsEntry !== 'function') {
            return fromDataTransferItem(item);
        }
        var entry = item.webkitGetAsEntry();
        // Safari supports dropping an image node from a different window and can be retrieved using
        // the DataTransferItem.getAsFile() API
        // NOTE: FileSystemEntry.file() throws if trying to get the file
        if (entry && entry.isDirectory) {
            return fromDirEntry(entry);
        }
        return fromDataTransferItem(item);
    }
    function flatten(items) {
        return items.reduce(function (acc, files) { return __spread(acc, (Array.isArray(files) ? flatten(files) : [files])); }, []);
    }
    function fromDataTransferItem(item) {
        var file = item.getAsFile();
        if (!file) {
            return Promise.reject(item + " is not a File");
        }
        var fwp = toFileWithPath(file);
        return Promise.resolve(fwp);
    }
    // https://developer.mozilla.org/en-US/docs/Web/API/FileSystemEntry
    function fromEntry(entry) {
        return __awaiter(this, void 0, void 0, function () {
            return __generator(this, function (_a) {
                return [2 /*return*/, entry.isDirectory ? fromDirEntry(entry) : fromFileEntry(entry)];
            });
        });
    }
    // https://developer.mozilla.org/en-US/docs/Web/API/FileSystemDirectoryEntry
    function fromDirEntry(entry) {
        var reader = entry.createReader();
        return new Promise(function (resolve, reject) {
            var entries = [];
            function readEntries() {
                var _this = this;
                // https://developer.mozilla.org/en-US/docs/Web/API/FileSystemDirectoryEntry/createReader
                // https://developer.mozilla.org/en-US/docs/Web/API/FileSystemDirectoryReader/readEntries
                reader.readEntries(function (batch) { return __awaiter(_this, void 0, void 0, function () {
                    var files, err_1, items;
                    return __generator(this, function (_a) {
                        switch (_a.label) {
                            case 0:
                                if (!!batch.length) return [3 /*break*/, 5];
                                _a.label = 1;
                            case 1:
                                _a.trys.push([1, 3, , 4]);
                                return [4 /*yield*/, Promise.all(entries)];
                            case 2:
                                files = _a.sent();
                                resolve(files);
                                return [3 /*break*/, 4];
                            case 3:
                                err_1 = _a.sent();
                                reject(err_1);
                                return [3 /*break*/, 4];
                            case 4: return [3 /*break*/, 6];
                            case 5:
                                items = Promise.all(batch.map(fromEntry));
                                entries.push(items);
                                // Continue reading
                                readEntries();
                                _a.label = 6;
                            case 6: return [2 /*return*/];
                        }
                    });
                }); }, function (err) {
                    reject(err);
                });
            }
            readEntries();
        });
    }
    // https://developer.mozilla.org/en-US/docs/Web/API/FileSystemFileEntry
    function fromFileEntry(entry) {
        return __awaiter(this, void 0, void 0, function () {
            return __generator(this, function (_a) {
                return [2 /*return*/, new Promise(function (resolve, reject) {
                        entry.file(function (file) {
                            var fwp = toFileWithPath(file, entry.fullPath);
                            resolve(fwp);
                        }, function (err) {
                            reject(err);
                        });
                    })];
            });
        });
    }

    exports.fromEvent = fromEvent;

    Object.defineProperty(exports, '__esModule', { value: true });

})));
//# sourceMappingURL=file-selector.umd.js.map