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main_plugin/dgrm/infrastructure/file.js

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+/**
+ * save file to user
+ * @param {Blob} blob
+ * @param {string} name
+ */
+export function fileSave(blob, name) { ('showSaveFilePicker' in window) ? fileSaveAs(blob) : fileDownload(blob, name); }
+
+/**
+ * save file with "File save as" dialog
+ * @param {Blob} blob
+ */
+async function fileSaveAs(blob) {
+	try {
+		// @ts-ignore
+		const writable = await (await window.showSaveFilePicker({
+			types: [
+				{
+					description: 'PNG Image',
+					accept: {
+						'image/png': ['.png']
+					}
+				}
+			]
+		})).createWritable();
+		await writable.write(blob);
+		await writable.close();
+	} catch {
+		alert('File not saved');
+	}
+}
+
+/**
+ * save file with default download process
+ * @param {Blob} blob
+ * @param {string} name
+ */
+function fileDownload(blob, name) {
+	const link = document.createElement('a');
+	link.download = name;
+	link.href = URL.createObjectURL(blob);
+	link.click();
+	URL.revokeObjectURL(link.href);
+	link.remove();
+}
+
+/**
+ * @param {string} accept
+ * @param {BlobCallback} callBack
+ */
+export function fileOpen(accept, callBack) {
+	const input = document.createElement('input');
+	input.type = 'file';
+	input.multiple = false;
+	input.accept = accept;
+	input.onchange = async function() {
+		callBack((!input.files?.length) ? null : input.files[0]);
+	};
+	input.click();
+	input.remove();
+}