restructer/index.js

The restructer library is a type-safe encoder/decoder up to one level for objects.

module.exports = {
	encode: function(obj) {
		let encoded_string = typeof string !== 'undefined' ? string : '';
		for (var key in obj) {
			let k = key;
			let t = typeof obj[key];
			let v = obj[key];
			if (t === 'undefined') {
				encoded_string += '[' + k + ':undefined]=§';
			} else if (v === null) {
				encoded_string += '[' + k + ':null]=§';
			} else if (t === 'string') {
				let l = v.length;
				encoded_string += '[' + k + ':' + t + ':' + l + ']=' + v + '§';
			} else if (t === 'object') {
				if (Array.isArray(obj[key])) {
					let l = obj[key].length;
					encoded_string += '[' + k + ':array:' + l + ']=§';
				} else {
					let l = Object.keys(obj[key]);
					encoded_string += '[' + k + ':' + t + ':' + l + ']=§';
				}
				let child = obj[key];
				for (var ckey in child) {
					let ck = k + '<>' + ckey;
					let ct = typeof child[ckey];
					let cv = child[ckey];
					if (ct === 'undefined') {
						encoded_string += '[' + ck + ':undefined]=§';
					} else if (cv === null) {
						encoded_string += '[' + ck + ':null]=§';
					} else if (ct === 'string') {
						let cl = cv.length;
						encoded_string += '[' + ck + ':' + ct + ':' + cl + ']=' + cv + '§';
					} else if (ct === 'object') {
						encoded_string += '[' + ck + ':base64]=' + btoa(JSON.stringify(cv)) + '§';
					} else {
						encoded_string += '[' + ck + ':' + ct + ']=' + cv + '§';
					}
				}
			} else {
				encoded_string += '[' + k + ':' + t + ']=' + v + '§';
			}
		}
		return encoded_string;
	},

	decode: function(encoded_string) {
		let decodedObject = {};
		let objArray = encoded_string.split('§');
		for (var i = 0; i < objArray.length; i++) {
			let lineArray = objArray[i].substring(1).split(']=');
			let keyParts = lineArray[0].split(':');
			let value = lineArray[1];
			let keyObjectParts = keyParts[0].split('<>');
			if (keyObjectParts.length === 1) {
				if (keyParts[1] === 'string') {
					decodedObject[keyParts[0]] = String(value);
				} else if (keyParts[1] === 'number') {
					decodedObject[keyParts[0]] = parseInt(value);
				} else if (keyParts[1] === 'boolean') {
					decodedObject[keyParts[0]] = (value === 'true' ? true : false);
				} else if (keyParts[1] === 'array') {
					decodedObject[keyParts[0]] = new Array();
				} else if (keyParts[1] === 'object') {
					decodedObject[keyParts[0]] = new Object();
				} else if (keyParts[1] === 'base64') {
					decodedObject[keyParts[0]] = atob(value);
				} else if (keyParts[1] === 'null') {
					decodedObject[keyParts[0]] = null;
				} else if (keyParts[1] === 'undefined') {
					decodedObject[keyParts[0]] = undefined;
				}
			} else {
				if (keyParts[1] === 'string') {
					decodedObject[keyObjectParts[0]][keyObjectParts[1]] = String(value);
				} else if (keyParts[1] === 'number') {
					decodedObject[keyObjectParts[0]][keyObjectParts[1]] = parseInt(value);
				} else if (keyParts[1] === 'boolean') {
					decodedObject[keyObjectParts[0]][keyObjectParts[1]] = (value === 'true' ? true : false);
				} else if (keyParts[1] === 'null') {
					decodedObject[keyObjectParts[0]][keyObjectParts[1]] = null;
				} else if (keyParts[1] === 'array') {
					decodedObject[keyObjectParts[0]][keyObjectParts[1]] = new Array();
				} else if (keyParts[1] === 'object') {
					decodedObject[keyObjectParts[0]][keyObjectParts[1]] = new Object();
				} else if (keyParts[1] === 'base64') {
					decodedObject[keyObjectParts[0]][keyObjectParts[1]] = JSON.parse(atob(value));
				} else if (keyParts[1] === 'undefined') {
					decodedObject[keyObjectParts[0]][keyObjectParts[1]] = undefined;
				}
			}
		}
		return decodedObject;
	},
}