"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    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) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __generator = (this && this.__generator) || function (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 };
    }
};
var __read = (this && this.__read) || function (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;
};
var __spread = (this && this.__spread) || function () {
    for (var ar = [], i = 0; i < arguments.length; i++) ar = ar.concat(__read(arguments[i]));
    return ar;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.fromEvent = void 0;
var file_1 = require("./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.
 *
 * EXPERIMENTAL: A list of https://developer.mozilla.org/en-US/docs/Web/API/FileSystemHandle objects can also be passed as an arg
 * and a list of File objects will be returned.
 *
 * @param evt
 */
function fromEvent(evt) {
    return __awaiter(this, void 0, void 0, function () {
        return __generator(this, function (_a) {
            if (isObject(evt) && isDataTransfer(evt)) {
                return [2 /*return*/, getDataTransferFiles(evt.dataTransfer, evt.type)];
            }
            else if (isChangeEvt(evt)) {
                return [2 /*return*/, getInputFiles(evt)];
            }
            else if (Array.isArray(evt) && evt.every(function (item) { return 'getFile' in item && typeof item.getFile === 'function'; })) {
                return [2 /*return*/, getFsHandleFiles(evt)];
            }
            return [2 /*return*/, []];
        });
    });
}
exports.fromEvent = fromEvent;
function isDataTransfer(value) {
    return isObject(value.dataTransfer);
}
function isChangeEvt(value) {
    return isObject(value) && isObject(value.target);
}
function isObject(v) {
    return typeof v === 'object' && v !== null;
}
function getInputFiles(evt) {
    return fromList(evt.target.files).map(function (file) { return file_1.toFileWithPath(file); });
}
// Ee expect each handle to be https://developer.mozilla.org/en-US/docs/Web/API/FileSystemFileHandle
function getFsHandleFiles(handles) {
    return __awaiter(this, void 0, void 0, function () {
        var files;
        return __generator(this, function (_a) {
            switch (_a.label) {
                case 0: return [4 /*yield*/, Promise.all(handles.map(function (h) { return h.getFile(); }))];
                case 1:
                    files = _a.sent();
                    return [2 /*return*/, files.map(function (file) { return file_1.toFileWithPath(file); })];
            }
        });
    });
}
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 === null) {
                        return [2 /*return*/, []];
                    }
                    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 file_1.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) {
    if (items === null) {
        return [];
    }
    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 = file_1.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 = file_1.toFileWithPath(file, entry.fullPath);
                        resolve(fwp);
                    }, function (err) {
                        reject(err);
                    });
                })];
        });
    });
}
//# sourceMappingURL=file-selector.js.map