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jquery.formality.js
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jquery.formality.js
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$.fn.extend(
(function() {
//
// ECMA Script 5 and other functional methods
// Some of these are implemented by Chrome and Firefox 4, but not older browsers
//
var reduce = function(list, fn, aggregate) {
list.forEach(function(item) {
aggregate = fn.apply(this, [item, aggregate]);
});
return aggregate;
};
var getKeys = function(obj){
var keys = [];
for(var key in obj){
keys.push(key);
}
return keys;
}
var groupBy = function(array, getKeyFromItem) {
var groups = {};
array.forEach(function(item) {
var key = getKeyFromItem(item);
var value = groups[key];
if (!value) value = groups[key] = [];
value.push(item);
});
return groups;
};
var splitBuckets = function(array, splitOn) {
var groups = groupBy(array, splitOn);
return reduce(getKeys(groups), function(key, result) {
result.push(groups[key]);
return result;
}, []);
};
//
// Input attributes used to get the target object path
//
var getFormalityAttribute = function($item) {
return $item.attr('name') || $item.attr('id');
};
//
// OGNL module: process an input's attributes and parent contexts
// to get the full path in the target object
//
var OGNL = function() {
var getParentContext = function($root, $input) {
var usefulParents = $input.parents('*[data-formality-context]').get();
return reduce(usefulParents, function(parent, result) {
var contextElements = $(parent).attr('data-formality-context').split('.').reverse();
return result.concat(contextElements);
}, []).reverse();
};
var getInputPath = function($input) {
var path = getFormalityAttribute($input).split('.');
path.pop();
return path;
};
var getFullPath = function($root, $input) {
var context = getParentContext($root, $input);
var path = getInputPath($input);
return context.concat(path);
};
var createNode = function(targetObject, pathItem, itemValue) {
var arrayMatch = pathItem.match(/(.*?)\[(\d)\]/);
if (arrayMatch) {
var arrayName = arrayMatch[1];
var index = arrayMatch[2];
if (!(targetObject[arrayName])) {
targetObject[arrayName] = [];
}
targetObject[arrayName][index] = itemValue(targetObject[arrayName][index]);
} else {
targetObject[pathItem] = itemValue(targetObject[pathItem]);
}
};
return {
getFullPath: getFullPath,
createNode: createNode
}
};
//
// Structure of target inputs that mirrors the final hierarchy
//
// elements: [
// $input1,
// $input2
// ],
//
// children: {
// myChild: { elements, children },
// myArray[0]: { elements, children }
// myArray[1]: { elements, children }
// },
//
var scaffolding = function() {
var hierarchyLevel = function() {
return {
elements: [],
children: {}
};
};
var completeHierarchy = function(object, targetPath) {
var leaf = object;
reduce(targetPath, function(name, result) {
if (!(result.children[name])) {
result.children[name] = hierarchyLevel();
}
leaf = result.children[name];
return leaf;
}, object);
return leaf;
};
var create = function($root) {
var $inputs = $('input,select', $root);
var hierarchy = hierarchyLevel();
var ognl = OGNL();
$inputs.each(function(_, input) {
var fullPath = ognl.getFullPath($root, $(input));
var leaf = completeHierarchy(hierarchy, fullPath);
leaf.elements.push($(input));
});
return hierarchy;
};
return {
create: create
};
};
//
// Set of inputs at a given level that can return a flat javascript object
// The whole set must be processed at once since checkboxes for example generate an array
//
var inputSet = function() {
var getKey = function($item) {
return getFormalityAttribute($item).split('.').pop();
};
var textsAndRadios = function($item, form) {
form[getKey($item)] = $item.val();
return form;
}
var selects = function($item, form) {
var values = $item.find('option:selected').map(function(_, option) {
return $(option).val();
}).get();
var isMultiple = $item.attr('multiple') === 'multiple' || $item.attr('multiple') === true;
form[getKey($item)] = isMultiple ? (values || []) : values[0];
return form;
};
var checkboxes = function(group, form) {
var key = getKey(group[0]);
if (group.length == 1) {
form[key] = group[0].is(':checked') ? 'true' : 'false';
} else {
form[key] = reduce(group, function($item, checkedValues) {
if ($item.is(':checked')) {
checkedValues.push($item.val());
}
return checkedValues;
}, []);
}
return form;
};
var is = function(type) {
return function(item) {
return item.is(type);
}
};
return {
objectFromValues: function(inputs) {
var object = {};
var textTypes = ['text', 'email', 'url', 'tel', 'number', 'range', 'date', 'datetime', 'search'];
var reduceTextFields = function(type) {
reduce(inputs.filter(is('input[type=' + type + ']')), textsAndRadios, object);
};
textTypes.forEach(reduceTextFields);
reduce(inputs.filter(is(':radio:checked')), textsAndRadios, object);
reduce(inputs.filter(is('select')), selects, object);
// Group checkboxes by name to identify single vs. groups
var allCheckboxes = inputs.filter(is(':checkbox'));
reduce(splitBuckets(allCheckboxes, getKey), checkboxes, object);
return object;
}
}
};
//
// Final object returned by the plugin
//
var formValues = function($root) {
var ognl = OGNL();
var processLevel = function(level, object) {
var object = inputSet().objectFromValues(level.elements);
getKeys(level.children).forEach(function(name) {
var target = ognl.createNode(object, name, function(leaf) {
return processLevel(level.children[name], leaf);
});
});
return object;
};
var structure = scaffolding().create($root);
return processLevel(structure);
};
//
// Entry point: $('#myForm').formality();
//
return {
formality: function() { return formValues(this); }
}
})()
);