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<!--
@license
Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
Code distributed by Google as part of the polymer project is also
subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
-->
<link rel="import" href="../polymer/polymer.html">
<script>
'use strict';
Polymer({
is: 'iron-query-params',
properties: {
paramsString: {
type: String,
notify: true,
observer: 'paramsStringChanged',
},
paramsObject: {
type: Object,
notify: true,
value: function() {
return {};
}
},
_dontReact: {
type: Boolean,
value: false
}
},
hostAttributes: {
hidden: true
},
observers: [
'paramsObjectChanged(paramsObject.*)'
],
paramsStringChanged: function() {
this._dontReact = true;
this.paramsObject = this._decodeParams(this.paramsString);
this._dontReact = false;
},
paramsObjectChanged: function() {
if (this._dontReact) {
return;
}
this.paramsString = this._encodeParams(this.paramsObject)
.replace(/%3F/g, '?').replace(/%2F/g, '/').replace(/'/g, '%27');
},
_encodeParams: function(params) {
var encodedParams = [];
for (var key in params) {
var value = params[key];
if (value === '') {
encodedParams.push(encodeURIComponent(key));
} else if (value) {
encodedParams.push(
encodeURIComponent(key) +
'=' +
encodeURIComponent(value.toString())
);
}
}
return encodedParams.join('&');
},
_decodeParams: function(paramString) {
var params = {};
// Work around a bug in decodeURIComponent where + is not
// converted to spaces:
paramString = (paramString || '').replace(/\+/g, '%20');
var paramList = paramString.split('&');
for (var i = 0; i < paramList.length; i++) {
var param = paramList[i].split('=');
if (param[0]) {
params[decodeURIComponent(param[0])] =
decodeURIComponent(param[1] || '');
}
}
return params;
}
});
</script>
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