hedera-web/js/vn/hash.js

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var VnObject = require ('./object');
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var VnDate = require ('./date');
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var Lot = require ('./lot');
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/**
* Class to handle the URL.
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*/
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module.exports = new Class
({
Extends: VnObject
,Implements: Lot
,Properties: {
window:
{
type: Window
,set: function (x)
{
this._window = x;
x.addEventListener ('hashchange', this._hashChangedHandler);
this._hashChanged ();
}
,get: function ()
{
return this._window;
}
},
params:
{
type: Object
,set: function (x)
{
this.setAll (x);
}
,get: function ()
{
return this._hashMap;
}
}
}
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,initialize: function (props)
{
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this._hash = null;
this._hashMap = null;
this._window = null;
this._hashChangedHandler = this._hashChanged.bind (this);
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this.parent (props);
}
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,get: function (key, type)
{
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return this.parseValue (this._hashMap[key], type);
}
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,set: function (key, value)
{
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var object = {};
object[key] = value;
this.assign (object);
}
/**
* Sets the hash part of the URL, respecting the current hash variables.
*
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* @param {Object} object A key-value object
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*/
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,assign: function (object)
{
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var newObject = this._hashMap;
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for (var key in object)
newObject[key] = object[key];
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this.setAll (newObject);
}
/**
* Sets the hash part of the URL.
*
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* @param {Object} object A key-value object
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*/
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,setAll: function (object)
{
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if (object)
for (var key in object)
if (object[key] === null || object[key] === undefined)
delete object[key];
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var newHash = this.make (object);
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if (!object)
object = {};
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if (newHash !== this._hash)
{
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this._hashMap = object;
this._hash = newHash;
this._blockChanged = true;
location.hash = newHash;
this._blockChanged = false;
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this.changed ();
}
}
/**
* Creates a URL with the given hash data.
*
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* @param {Object} object A key-value object
* @param {boolean} add %true to combine with the current params, %false otherwise
* @return {String} The URL
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*/
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,make: function (object, add)
{
var hash = '#!';
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if (add && object)
for (var key in this._hashMap)
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if (!object[key])
object[key] = this._hashMap[key];
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for (var key in object)
{
if (hash.length > 2)
hash += '&';
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hash += encodeURIComponent (key) +'='+ this.renderValue (object[key]);
}
return hash;
}
,_hashChanged: function ()
{
var newHash = location.hash;
if (this._blockChanged || newHash === this._hash)
return;
var newMap = hashMap = {};
var kvPairs = newHash.substr(2).split ('&');
for (var i = 0; i < kvPairs.length; i++)
{
var kvPair = kvPairs[i].split ('=', 2);
if (kvPair[0])
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newMap[decodeURIComponent (kvPair[0])] = decodeURIComponent (kvPair[1]);
}
this._hashMap = newMap;
this._hash = newHash;
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this.changed ();
}
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,renderValue: function (v)
{
switch (typeof v)
{
case 'number':
return v;
case 'boolean':
return (v) ? 'true' : 'false';
case 'object':
if (v instanceof Date)
return VnDate.strftime (v, '%Y-%m-%d');
}
return v;
}
,parseValue: function (v, type)
{
if (v === '')
return null;
if (type && v !== undefined && v !== null)
switch (type)
{
case Boolean:
return (/^(true|1)$/i).test (v);
case Number:
return 0 + new Number (v);
case Date:
var date = new Date (v);
date.setHours (0, 0, 0, 0);
return date;
}
return v;
}
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,_destroy: function ()
{
this._window.removeEventListener ('hashchange', this._hashChangedHandler);
this._window = null;
this.parent ();
}
});