User:TheFearow/qstring.js

/** function QueryString(qString) { this.string = qString; this.params = {};
 * Maps the querystring to an object
 * Functions:
 * QueryString.exists(key)
 * returns true if the particular key is set
 * QueryString.get(key)
 * returns the value associated to the key
 * QueryString.equals(key, value)
 * returns true if the value associated with given key equals given value
 * QueryString.toString
 * returns the query string as a string
 * QueryString.create( hash )
 * creates an querystring and encodes strings via encodeURIComponent and joins arrays with |
 * In static context, the value of location.search.substring(1), else the value given to the constructor is going to be used. The mapped hash is saved in the object.
 * Example:
 * var value = QueryString.get('key');
 * var obj = new QueryString('foo=bar&baz=quux');
 * value = obj.get('foo');
 * Example:
 * var value = QueryString.get('key');
 * var obj = new QueryString('foo=bar&baz=quux');
 * value = obj.get('foo');
 * value = obj.get('foo');

if( qString.length == 0 ) { return; }

qString.replace(/\+/, ' '); var args = qString.split('&');

for( var i in args ) { if( typeof( args[i] ) != 'string' ) { continue; } var pair = args[i].split( '=' ); var key = decodeURIComponent( pair[0] ), value = key;

if( pair.length == 2 ) { value = decodeURIComponent( pair[1] ); }

this.params[key] = value; } }

QueryString.static = null;

QueryString.staticInit = function { if( QueryString.static == null ) { QueryString.static = new QueryString(location.search.substring(1)); } }

QueryString.get = function(key) { QueryString.staticInit; return QueryString.static.get(key); };

QueryString.prototype.get = function(key) { return this.params[key] ? this.params[key] : null; };

QueryString.exists = function(key) { QueryString.staticInit; return QueryString.static.exists(key); }

QueryString.prototype.exists = function(key) { return this.params[key] ? true : false; }

QueryString.equals = function(key, value) { QueryString.staticInit; return QueryString.static.equals(key, value); }

QueryString.prototype.equals = function(key, value) { return this.params[key] == value ? true : false; }

QueryString.toString = function { QueryString.staticInit; return QueryString.static.toString; }

QueryString.prototype.toString = function { return this.string ? this.string : null; }

QueryString.create = function( arr ) { var resarr = Array; for( var i in arr ) { if( typeof arr[i] == 'object' ){ var v = Array; for(var j in arr[i] ) { v[j] = encodeURIComponent( arr[i][j] ); } resarr.push( encodeURIComponent( i ) + '=' + v.join('|')  ); } else { resarr.push( encodeURIComponent( i ) + '=' + encodeURIComponent( arr[i] ) ); } }

return resarr.join('&'); } QueryString.prototype.create = QueryString.create;