gs-utils-files.js

"use strict";

function GSUloadJSFile( src ) { return $.$loadJS( src ); }
function GSUdownloadURL( name, url ) { $.$downloadURL( name, url ); }
function GSUdownloadBlob( name, blob ) { $.$downloadBlob( name, blob ); }

function GSUgetFileContent( file, format ) {
	return new Promise( res => {
		const rd = new FileReader();

		rd.onload = e => res( e.target.result );
		switch ( format ) {
			case "text": rd.readAsText( file ); break;
			case "array": rd.readAsArrayBuffer( file ); break;
		}
	} );
}

const GSUopenFileManager = () => new Promise( res => {
	GSUopenFileManager.$inputRes = res;
	GSUopenFileManager.$input.$click();
} );
GSUopenFileManager.$inputRes = null;
GSUopenFileManager.$callback = e => GSUopenFileManager.$inputRes( e.target.files );
GSUopenFileManager.$input = $( "<input>" )
	.$setAttr( "type", "file" )
	.$onchange( GSUopenFileManager.$callback );

function GSUgetFilesDataTransfert_rec( files, item, path = "" ) {
	return new Promise( res => {
		if ( item.isFile ) {
			item.file( f => {
				f.filepath = path + f.name;
				files.push( f );
				res( f );
			} );
		} else if ( item.isDirectory ) {
			const dirReader = item.createReader();

			dirReader.readEntries( entries => {
				const proms = [];

				for ( const ent of entries ) {
					proms.push( GSUgetFilesDataTransfert_rec( files, ent, `${ path }${ item.name }/` ) );
				}
				res( Promise.all( proms ) );
			} );
		}
	} );
}
function GSUgetFilesDataTransfert( dataTransferItems ) {
	const files = [];

	return new Promise( res => {
		const proms = [];

		for ( const it of dataTransferItems ) {
			const ent = it.webkitGetAsEntry();

			if ( ent ) {
				proms.push( GSUgetFilesDataTransfert_rec( files, ent ) );
			}
		}
		Promise.all( proms ).then( () => res( files ) );
	} );
}