transForm.js
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(function (name, definition) {
if (typeof module != 'undefined') module.exports = definition();
else if (typeof define == 'function' && typeof define.amd == 'object') define(definition);
else {
var noConflict = this[name];
this[name] = definition();
if (noConflict) this[name].noConflict = noConflict;
}
}('transForm', function () {
var _defaults = {
delimiter: '.',
skipDisabled: true,
skipReadOnly: false,
skipFalsy: false,
useIdOnEmptyName: true,
triggerChange: false
};
/* Serialize */
function serialize(formEl, options, nodeCallback) {
var el = makeElement(formEl),
opts = getOptions(options),
inputs = getFields(el, opts.skipDisabled, opts.skipReadOnly),
result = {};
for (var i = 0, l = inputs.length; i < l; i++) {
var input = inputs[i],
key = input.name || opts.useIdOnEmptyName && input.id;
if (!key) continue;
var entry = null;
if (nodeCallback) entry = nodeCallback(input, key);
if (!entry) entry = getEntryFromInput(input, key)
if (!isValidValue(entry.value, opts.skipFalsy)) continue;
saveEntryToResult(result, entry, opts.delimiter);
}
return result;
}
function isValidValue(value, skipFalsy) {
return !(typeof value === 'undefined' || value === null || (skipFalsy && (!value || (isArray(value) && !value.length))))
}
function getEntryFromInput(input, key) {
var nodeType = input.type && input.type.toLowerCase(),
entry = { name: key, value: null };
switch (nodeType) {
case 'radio':
if (input.checked)
entry.value = input.value === 'on' ? true : input.value;
break;
case 'checkbox':
entry.value = input.checked ? (input.value === 'on' ? true : input.value) : false;
break;
case 'select-multiple':
entry.value = [];
for (var i = 0, l = input.options.length; i < l; i++)
if (input.options[i].selected) entry.value.push(input.options[i].value);
break;
case 'file':
//Only interested in the filename (Chrome adds C:\fakepath\ for security anyway)
entry.value = input.value.split('\\').pop();
break;
case 'button':
case 'submit':
case 'reset':
break;
default:
entry.value = input.value;
}
return entry;
}
function parseString(str, delimiter) {
var result = [],
split = str.split(delimiter),
len = split.length;
for (var i = 0; i < len; i++) {
var s = split[i].split('['),
l = s.length;
for (var j = 0; j < l; j++) {
var key = s[j];
if (!key) {
//if the first one is empty, continue
if (j === 0) continue;
//if the undefined key is not the last part of the string, throw error
if (j !== l - 1)
error('Undefined key is not the last part of the name > ' + str);
}
//strip "]" if its there
if (key && key[key.length - 1] === ']')
key = key.slice(0, -1);
result.push(key);
}
}
return result;
}
function saveEntryToResult(parent, entry, delimiter) {
//not not accept falsy values in array collections
if (/\[\]$/.test(entry.name) && !entry.value) return;
var parts = parseString(entry.name, delimiter);
for (var i = 0, l = parts.length; i < l; i++) {
var part = parts[i];
//if last
if (i === l - 1) {
parent[part] = entry.value;
} else {
//check if the next part is an index
var index = parts[i + 1];
if (!index || isNumber(index)) {
if (!isArray(parent[part]))
parent[part] = [];
//if second last
if (i === l - 2) {
//array of values
parent[part].push(entry.value);
} else {
//array of objects
if (!isObject(parent[part][index]))
parent[part][index] = {};
parent = parent[part][index];
}
i++;
} else {
if (!isObject(parent[part]))
parent[part] = {};
parent = parent[part];
}
}
}
return { pointer: parent, prop: part };
}
/* Deserialize */
function deserialize(formEl, data, options, nodeCallback) {
var el = makeElement(formEl),
opts = getOptions(options),
inputs = getFields(el, opts.skipDisabled, opts.skipReadOnly);
if (!isObject(data)) {
if (!isString(data)) return;
try { //Try to parse the passed data as JSON
data = JSON.parse(data);
} catch (e) {
error('Passed string is not a JSON string > ' + data);
}
}
for (var i = 0, l = inputs.length; i < l; i++) {
var input = inputs[i],
key = input.name || opts.useIdOnEmptyName && input.id,
value = getFieldValue(key, opts.delimiter, data);
if (typeof value === 'undefined' || value === null) {
clearInput(input, opts.triggerChange);
continue;
}
var mutated = nodeCallback && nodeCallback(input, value);
if (!mutated) setValueToInput(input, value, opts.triggerChange);
}
}
function getFieldValue(key, delimiter, ref) {
if (!key) return;
var parts = parseString(key, delimiter);
for (var i = 0, l = parts.length; i < l; i++) {
if (!ref) return;
var part = ref[parts[i]];
if (typeof part === 'undefined' || part === null) return;
//if last
if (i === l - 1) {
return part;
} else {
var index = parts[i + 1];
if (index === '') {
return part;
} else if (isNumber(index)) {
//if second last
if (i === l - 2)
return part[index];
else
ref = part[index];
i++;
} else {
ref = part;
}
}
}
}
function contains(array, value) {
for (var i = array.length; i--;)
if (array[i] == value) return true;
return false;
}
function setValueToInput(input, value, triggerChange) {
var nodeType = input.type && input.type.toLowerCase();
switch (nodeType) {
case 'radio':
if (value == input.value) input.checked = true;
break;
case 'checkbox':
input.checked = isArray(value)
? contains(value, input.value)
: value === true || value == input.value;
break;
case 'select-multiple':
if (isArray(value))
for (var i = input.options.length; i--;)
input.options[i].selected = contains(value, input.options[i].value);
else
input.value = value;
break;
case 'button':
case 'submit':
case 'reset':
case 'file':
break;
default:
input.value = value;
}
if (triggerChange)
triggerEvent(input, 'change');
}
/* Clear */
function clear(formEl, options) {
var el = makeElement(formEl),
opts = getOptions(options),
inputs = getFields(el, opts.skipDisabled, opts.skipReadOnly);
for (var i = 0, l = inputs.length; i < l; i++)
clearInput(inputs[i], opts.triggerChange);
}
function clearInput(input, triggerChange) {
var nodeType = input.type && input.type.toLowerCase();
switch (nodeType) {
case 'select-one':
input.selectedIndex = 0;
break;
case 'select-multiple':
for (var i = input.options.length; i--;)
input.options[i].selected = false;
break;
case 'radio':
case 'checkbox':
if (input.checked) input.checked = false;
break;
case 'button':
case 'submit':
case 'reset':
case 'file':
break;
default:
input.value = '';
}
if (triggerChange)
triggerEvent(input, 'change');
}
/* Submit */
function submit(formEl, html5Submit) {
var el = makeElement(formEl);
if (!html5Submit) {
if (isFunction(el.submit))
el.submit();
else
error('The element is not a form element > ' + formEl);
return;
}
var clean, btn = el.querySelector('[type="submit"]');
if (!btn) {
clean = true;
btn = document.createElement('button');
btn.type = 'submit';
btn.style.display = 'none';
el.appendChild(btn);
}
triggerEvent(btn, 'click');
if (clean) el.removeChild(btn);
}
/* Helper functions */
function isObject(obj) {
return Object.prototype.toString.call(obj) === '[object Object]';
}
function isNumber(n) {
return n - parseFloat(n) + 1 >= 0;
}
function isArray(arr) {
return !!(arr && arr.shift); //If it shifts like an array, its a duck.
}
function isFunction(fn) {
return typeof fn === 'function';
}
function isString(s) {
return typeof s === 'string' || s instanceof String;
}
function triggerEvent(el, type) {
var e;
if (document.createEvent) {
e = document.createEvent('HTMLEvents');
e.initEvent(type, true, true);
el.dispatchEvent(e);
} else { //old IE
e = document.createEventObject();
el.fireEvent('on' + type, e);
}
}
function makeElement(el) {
var element = isString(el) ? document.querySelector(el) || document.getElementById(el) : el;
if (!element) error('Element not found with ' + el);
return element;
}
function getFields(parent, skipDisabled, skipReadOnly) {
var fields = ['input', 'select', 'textarea'];
for (var i = 0; i < fields.length; i++) {
var field = fields[i];
if (skipDisabled) field += ':not([disabled])';
if (skipReadOnly) field += ':not([readonly])';
field += ':not([data-trans-form="ignore"])';
fields[i] = field;
}
return parent.querySelectorAll(fields.join(','));
}
function getOptions(options) {
if (!isObject(options)) return _defaults;
var o, opts = {};
for (o in _defaults) opts[o] = _defaults[o];
for (o in options) opts[o] = options[o];
return opts;
}
function setDefaults(defaults) {
_defaults = getOptions(defaults);
}
function error(e) {
throw new Error('transForm.js ♦ ' + e);
}
/* Exposed functions */
return {
serialize: serialize,
deserialize: deserialize,
clear: clear,
submit: submit,
setDefaults: setDefaults
};
}));