50 lines
1.5 KiB
TypeScript
50 lines
1.5 KiB
TypeScript
export default async function getFilesFromDataTransferItems(dataTransferItems: DataTransferItemList) {
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const files: File[] = [];
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function traverseFileTreePromise(entry: FileSystemEntry | File, item: DataTransferItem) {
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return new Promise(resolve => {
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if (entry instanceof File) {
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files.push(entry);
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resolve(entry);
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} else if (entry.isFile) {
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const itemFile = item.getAsFile();
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(entry as FileSystemFileEntry).file((file) => {
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files.push(file);
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resolve(file);
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}, () => {
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// iOS Safari throws an error "NotFoundError: Path does not exist" for files from the clipboard
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// https://stackoverflow.com/a/50059309
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if (itemFile) {
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files.push(itemFile);
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}
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resolve(itemFile);
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});
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} else if (entry.isDirectory) {
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let dirReader = (entry as FileSystemDirectoryEntry).createReader();
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dirReader.readEntries((entries) => {
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let entriesPromises = [];
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for (let entr of entries) {
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entriesPromises.push(traverseFileTreePromise(entr, item));
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}
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resolve(Promise.all(entriesPromises));
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});
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}
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});
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}
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let entriesPromises = [];
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for (let item of dataTransferItems) {
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if (item.kind === 'file') {
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const entry = item.webkitGetAsEntry() || item.getAsFile();
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if (entry) {
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entriesPromises.push(traverseFileTreePromise(entry, item));
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}
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}
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}
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await Promise.all(entriesPromises);
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return files;
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}
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