tools.js

function showElements() {
	for (var i = 0; i < arguments.length; i++) {
		document.getElementById(arguments[i]).style.display = 'block';
	}
}

function hideElements() {
	for (var i = 0; i < arguments.length; i++) {
		document.getElementById(arguments[i]).style.display = 'none';
	}
}

document.addEventListener('DOMContentLoaded', function () {
	var dragZone = document.querySelector('.upload')
	
	function drag(event) {
		event.preventDefault();
		dragZone.classList.add('upload--active');
	}
	
	function dragEnd(event) {
		event.preventDefault();
		dragZone.classList.remove('upload--active');
	}
	
	document.addEventListener('dragover', drag, false);
	document.addEventListener('dragenter', drag, false);
	
	document.addEventListener('dragleave', dragEnd, false);
	document.addEventListener('dragend', dragEnd, false);
	
	document.addEventListener('drop', function (event) {
		dragEnd(event);
		processFile(event.dataTransfer);
	}, false);
	
	showElements('upload');
});

function processFile(elm) {
	hideElements('converted', 'error.corrupted', 'error.file-format', 'error.reading');
	
	var file = elm.files[0];
	var filename = file.name;
	var reader = new FileReader();
	
	if (filename.substring(filename.length - 5, filename.length) == '.phar') {
		reader.onload = (function (file) {
			return function (e) {
				try {
					var data = PharUtils.PharZipConverter.toZip(new PharUtils.Phar().loadPharData(new Uint8Array(e.target.result))).compress();
					var filename = file.name;
					filename = filename.substring(0, filename.length - 5) + '.zip';
					saveAs(new Blob([data], {
						type: 'application/zip'
					}), filename);
					showElements('converted');
				} catch (error) {
					showElements('error.corrupted');
					console.error(error);
				}
			};
		})(file);
	} else if (filename.substring(filename.length - 4, filename.length) == '.zip') {
		reader.onload = (function (file) {
			return function (e) {
				try {
					var data = PharUtils.PharZipConverter.toPhar(new Uint8Array(e.target.result)).savePharData(true);
					var filename = file.name;
					filename = filename.substring(0, filename.length - 4) + '.phar';
					saveAs(new Blob([data], {
						type: 'application/x-php'
					}), filename);
					showElements('converted');
				} catch (error) {
					showElements('error.corrupted');
					console.error(error);
				}
			};
		})(file);
	} else {
		showElements('error.file-format');
		elm.value = '';
		return;
	}
	
	reader.onerror = function (e) {
		showElements('error.reading');
	};
	reader.onloadend = function (e) {
		showElements('upload');
		hideElements('converting');
	};
	
	hideElements('upload');
	showElements('converting');
	reader.readAsArrayBuffer(elm.files[0]);
	
	elm.value = '';
}

function toUint8Array(str) {
	var u8a = new Uint8Array(str.length);
	for (var i = 0; i < str.length; i++) {
		u8a[i] = str.charCodeAt(i);
	}
	return u8a;
}