devextreme
Version:
HTML5 JavaScript Component Suite for Responsive Web Development
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JavaScript
/**
* DevExtreme (esm/file_management/object_provider.js)
* Version: 21.1.4
* Build date: Mon Jun 21 2021
*
* Copyright (c) 2012 - 2021 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
import {
find
} from "../core/utils/array";
import {
ensureDefined
} from "../core/utils/common";
import {
compileGetter,
compileSetter
} from "../core/utils/data";
import Guid from "../core/guid";
import {
isFunction
} from "../core/utils/type";
import {
errors
} from "../data/errors";
import {
Deferred
} from "../core/utils/deferred";
import {
getWindow
} from "../core/utils/window";
import {
fileSaver
} from "../exporter/file_saver";
import Errors from "../ui/widget/ui.errors";
import JSZip from "jszip";
import FileSystemProviderBase from "./provider_base";
import FileSystemError from "./error";
import ErrorCode from "./error_codes";
import {
pathCombine
} from "./utils";
var window = getWindow();
class ObjectFileSystemProvider extends FileSystemProviderBase {
constructor(options) {
options = ensureDefined(options, {});
super(options);
var initialArray = options.data;
if (initialArray && !Array.isArray(initialArray)) {
throw errors.Error("E4006")
}
var itemsExpr = options.itemsExpr || "items";
this._subFileItemsGetter = compileGetter(itemsExpr);
this._subFileItemsSetter = this._getSetter(itemsExpr);
var contentExpr = options.contentExpr || "content";
this._contentGetter = compileGetter(contentExpr);
this._contentSetter = this._getSetter(contentExpr);
var nameExpr = this._getNameExpr(options);
this._nameSetter = this._getSetter(nameExpr);
var isDirExpr = this._getIsDirExpr(options);
this._getIsDirSetter = this._getSetter(isDirExpr);
var keyExpr = this._getKeyExpr(options);
this._keySetter = this._getSetter(keyExpr);
var sizeExpr = this._getSizeExpr(options);
this._sizeSetter = this._getSetter(sizeExpr);
var dateModifiedExpr = this._getDateModifiedExpr(options);
this._dateModifiedSetter = this._getSetter(dateModifiedExpr);
this._data = initialArray || []
}
getItems(parentDir) {
return this._executeActionAsDeferred(() => this._getItems(parentDir), true)
}
renameItem(item, name) {
return this._executeActionAsDeferred(() => this._renameItemCore(item, name))
}
_renameItemCore(item, name) {
if (!item) {
return
}
var dataItem = this._findDataObject(item);
this._nameSetter(dataItem, name);
item.name = name;
item.key = this._ensureDataObjectKey(dataItem)
}
createDirectory(parentDir, name) {
return this._executeActionAsDeferred(() => {
this._validateDirectoryExists(parentDir);
this._createDataObject(parentDir, name, true)
})
}
deleteItems(items) {
return items.map(item => this._executeActionAsDeferred(() => this._deleteItem(item)))
}
moveItems(items, destinationDir) {
var destinationDataItem = this._findDataObject(destinationDir);
var array = this._getDirectoryDataItems(destinationDataItem);
var deferreds = items.map(item => this._executeActionAsDeferred(() => {
this._checkAbilityToMoveOrCopyItem(item, destinationDir);
var dataItem = this._findDataObject(item);
this._deleteItem(item);
array.push(dataItem)
}));
return deferreds
}
copyItems(items, destinationDir) {
var destinationDataItem = this._findDataObject(destinationDir);
var array = this._getDirectoryDataItems(destinationDataItem);
var deferreds = items.map(item => this._executeActionAsDeferred(() => {
this._checkAbilityToMoveOrCopyItem(item, destinationDir);
var dataItem = this._findDataObject(item);
var copiedItem = this._createCopy(dataItem);
array.push(copiedItem)
}));
return deferreds
}
uploadFileChunk(fileData, chunksInfo, destinationDirectory) {
if (chunksInfo.chunkIndex > 0) {
return chunksInfo.customData.deferred
}
this._validateDirectoryExists(destinationDirectory);
var deferred = chunksInfo.customData.deferred = new Deferred;
var reader = this._createFileReader();
reader.readAsDataURL(fileData);
reader.onload = () => {
var content = reader.result.split(",")[1];
var dataObj = this._createDataObject(destinationDirectory, fileData.name, false);
this._sizeSetter(dataObj, fileData.size);
this._dateModifiedSetter(dataObj, fileData.lastModifiedDate);
this._contentSetter(dataObj, content);
deferred.resolve()
};
reader.onerror = error => deferred.reject(error);
return deferred
}
downloadItems(items) {
if (1 === items.length) {
this._downloadSingleFile(items[0])
} else {
this._downloadMultipleFiles(items)
}
}
_downloadSingleFile(file) {
var content = this._getFileContent(file);
var byteString = window.atob(content);
var arrayBuffer = new ArrayBuffer(byteString.length);
var array = new Uint8Array(arrayBuffer);
for (var i = 0; i < byteString.length; i++) {
array[i] = byteString.charCodeAt(i)
}
var blob = new window.Blob([arrayBuffer], {
type: "application/octet-stream"
});
fileSaver.saveAs(file.name, null, blob)
}
_downloadMultipleFiles(files) {
var jsZip = getJSZip();
var zip = new jsZip;
files.forEach(file => zip.file(file.name, this._getFileContent(file), {
base64: true
}));
var options = {
type: "blob",
compression: "DEFLATE",
mimeType: "application/zip"
};
var deferred = new Deferred;
if (zip.generateAsync) {
zip.generateAsync(options).then(deferred.resolve)
} else {
deferred.resolve(zip.generate(options))
}
deferred.done(blob => fileSaver.saveAs("files.zip", null, blob))
}
_getFileContent(file) {
var dataItem = this._findDataObject(file);
return this._contentGetter(dataItem) || ""
}
_validateDirectoryExists(directoryInfo) {
if (!this._isFileItemExists(directoryInfo) || this._isDirGetter(directoryInfo.fileItem)) {
throw new FileSystemError(ErrorCode.DirectoryNotFound, directoryInfo)
}
}
_checkAbilityToMoveOrCopyItem(item, destinationDir) {
var dataItem = this._findDataObject(item);
var itemKey = this._getKeyFromDataObject(dataItem, item.parentPath);
var pathInfo = destinationDir.getFullPathInfo();
var currentPath = "";
pathInfo.forEach(info => {
currentPath = pathCombine(currentPath, info.name);
var pathKey = this._getDataObjectKey(info.key, currentPath);
if (pathKey === itemKey) {
throw new FileSystemError(ErrorCode.Other, item)
}
})
}
_createDataObject(parentDir, name, isDirectory) {
var dataObj = {};
this._nameSetter(dataObj, name);
this._getIsDirSetter(dataObj, isDirectory);
this._keySetter(dataObj, String(new Guid));
var parentDataItem = this._findDataObject(parentDir);
var array = this._getDirectoryDataItems(parentDataItem);
array.push(dataObj);
return dataObj
}
_createCopy(dataObj) {
var copyObj = {};
this._nameSetter(copyObj, this._nameGetter(dataObj));
this._getIsDirSetter(copyObj, this._isDirGetter(dataObj));
var items = this._subFileItemsGetter(dataObj);
if (Array.isArray(items)) {
var itemsCopy = [];
items.forEach(childItem => {
var childCopy = this._createCopy(childItem);
itemsCopy.push(childCopy)
});
this._subFileItemsSetter(copyObj, itemsCopy)
}
return copyObj
}
_deleteItem(fileItem) {
var dataItem = this._findDataObject(fileItem);
var parentDirDataObj = this._findFileItemObj(fileItem.pathInfo);
var array = this._getDirectoryDataItems(parentDirDataObj);
var index = array.indexOf(dataItem);
array.splice(index, 1)
}
_getDirectoryDataItems(directoryDataObj) {
if (!directoryDataObj) {
return this._data
}
var dataItems = this._subFileItemsGetter(directoryDataObj);
if (!Array.isArray(dataItems)) {
dataItems = [];
this._subFileItemsSetter(directoryDataObj, dataItems)
}
return dataItems
}
_getItems(parentDir) {
this._validateDirectoryExists(parentDir);
var pathInfo = parentDir.getFullPathInfo();
var parentDirKey = pathInfo && pathInfo.length > 0 ? pathInfo[pathInfo.length - 1].key : null;
var dirFileObjects = this._data;
if (parentDirKey) {
var directoryEntry = this._findFileItemObj(pathInfo);
dirFileObjects = directoryEntry && this._subFileItemsGetter(directoryEntry) || []
}
this._ensureKeysForDuplicateNameItems(dirFileObjects);
return this._convertDataObjectsToFileItems(dirFileObjects, pathInfo)
}
_ensureKeysForDuplicateNameItems(dataObjects) {
var names = {};
dataObjects.forEach(obj => {
var name = this._nameGetter(obj);
if (names[name]) {
this._ensureDataObjectKey(obj)
} else {
names[name] = true
}
})
}
_findDataObject(item) {
if (item.isRoot()) {
return null
}
var result = this._findFileItemObj(item.getFullPathInfo());
if (!result) {
var errorCode = item.isDirectory ? ErrorCode.DirectoryNotFound : ErrorCode.FileNotFound;
throw new FileSystemError(errorCode, item)
}
return result
}
_findFileItemObj(pathInfo) {
var _this = this;
if (!Array.isArray(pathInfo)) {
pathInfo = []
}
var currentPath = "";
var fileItemObj = null;
var fileItemObjects = this._data;
var _loop = function(i) {
fileItemObj = find(fileItemObjects, item => {
var hasCorrectFileItemType = _this._isDirGetter(item) || i === pathInfo.length - 1;
return _this._getKeyFromDataObject(item, currentPath) === pathInfo[i].key && _this._nameGetter(item) === pathInfo[i].name && hasCorrectFileItemType
});
if (fileItemObj) {
currentPath = pathCombine(currentPath, _this._nameGetter(fileItemObj));
fileItemObjects = _this._subFileItemsGetter(fileItemObj)
}
};
for (var i = 0; i < pathInfo.length && (0 === i || fileItemObj); i++) {
_loop(i)
}
return fileItemObj
}
_getKeyFromDataObject(dataObj, defaultKeyPrefix) {
var key = this._keyGetter(dataObj);
var relativeName = pathCombine(defaultKeyPrefix, this._nameGetter(dataObj));
return this._getDataObjectKey(key, relativeName)
}
_getDataObjectKey(key, relativeName) {
return key ? key : relativeName
}
_ensureDataObjectKey(dataObj) {
var key = this._keyGetter(dataObj);
if (!key) {
key = String(new Guid);
this._keySetter(dataObj, key)
}
return key
}
_hasSubDirs(dataObj) {
var subItems = ensureDefined(this._subFileItemsGetter(dataObj), []);
if (!Array.isArray(subItems)) {
return true
}
for (var i = 0; i < subItems.length; i++) {
if (true === this._isDirGetter(subItems[i])) {
return true
}
}
return false
}
_getSetter(expr) {
return isFunction(expr) ? expr : compileSetter(expr)
}
_isFileItemExists(fileItem) {
return fileItem.isDirectory && fileItem.isRoot() || !!this._findFileItemObj(fileItem.getFullPathInfo())
}
_createFileReader() {
return new window.FileReader
}
}
function getJSZip() {
if (!JSZip) {
throw Errors.Error("E1041", "JSZip")
}
return JSZip
}
export default ObjectFileSystemProvider;