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/**
* Functions for manipulating web forms.
*
* @author David I. Lehn <dlehn@digitalbazaar.com>
* @author Dave Longley
* @author Mike Johnson
*
* Copyright (c) 2011-2014 Digital Bazaar, Inc. All rights reserved.
*/
var forge = require('./forge');
/* Form API */
var form = module.exports = forge.form = forge.form || {};
(function($) {
/**
* Regex for parsing a single name property (handles array brackets).
*/
var _regex = /([^\[]*?)\[(.*?)\]/g;
/**
* Parses a single name property into an array with the name and any
* array indices.
*
* @param name the name to parse.
*
* @return the array of the name and its array indices in order.
*/
var _parseName = function(name) {
var rval = [];
var matches;
while(!!(matches = _regex.exec(name))) {
if(matches[1].length > 0) {
rval.push(matches[1]);
}
if(matches.length >= 2) {
rval.push(matches[2]);
}
}
if(rval.length === 0) {
rval.push(name);
}
return rval;
};
/**
* Adds a field from the given form to the given object.
*
* @param obj the object.
* @param names the field as an array of object property names.
* @param value the value of the field.
* @param dict a dictionary of names to replace.
*/
var _addField = function(obj, names, value, dict) {
// combine array names that fall within square brackets
var tmp = [];
for(var i = 0; i < names.length; ++i) {
// check name for starting square bracket but no ending one
var name = names[i];
if(name.indexOf('[') !== -1 && name.indexOf(']') === -1 &&
i < names.length - 1) {
do {
name += '.' + names[++i];
} while(i < names.length - 1 && names[i].indexOf(']') === -1);
}
tmp.push(name);
}
names = tmp;
// split out array indexes
var tmp = [];
$.each(names, function(n, name) {
tmp = tmp.concat(_parseName(name));
});
names = tmp;
// iterate over object property names until value is set
$.each(names, function(n, name) {
// do dictionary name replacement
if(dict && name.length !== 0 && name in dict) {
name = dict[name];
}
// blank name indicates appending to an array, set name to
// new last index of array
if(name.length === 0) {
name = obj.length;
}
// value already exists, append value
if(obj[name]) {
// last name in the field
if(n == names.length - 1) {
// more than one value, so convert into an array
if(!$.isArray(obj[name])) {
obj[name] = [obj[name]];
}
obj[name].push(value);
} else {
// not last name, go deeper into object
obj = obj[name];
}
} else if(n == names.length - 1) {
// new value, last name in the field, set value
obj[name] = value;
} else {
// new value, not last name, go deeper
// get next name
var next = names[n + 1];
// blank next value indicates array-appending, so create array
if(next.length === 0) {
obj[name] = [];
} else {
// if next name is a number create an array, otherwise a map
var isNum = ((next - 0) == next && next.length > 0);
obj[name] = isNum ? [] : {};
}
obj = obj[name];
}
});
};
/**
* Serializes a form to a JSON object. Object properties will be separated
* using the given separator (defaults to '.') and by square brackets.
*
* @param input the jquery form to serialize.
* @param sep the object-property separator (defaults to '.').
* @param dict a dictionary of names to replace (name=replace).
*
* @return the JSON-serialized form.
*/
form.serialize = function(input, sep, dict) {
var rval = {};
// add all fields in the form to the object
sep = sep || '.';
$.each(input.serializeArray(), function() {
_addField(rval, this.name.split(sep), this.value || '', dict);
});
return rval;
};
})(jQuery);
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