pryley / site-reviews

var GLSR = {};

GLSR.convertValue = function( value ) {

	if( GLSR.isNumeric( value )) {

		return parseFloat( value );

	}

	else if( value === 'true') {

		return true;

	}

	else if( value === 'false' ) {

		return false;

	}

	else if( value === '' || value === null ) {

		return undefined;

	}

	return value;

};

GLSR.getAjax = function( url, success ) {

	xhr.open( 'GET', url );

	xhr.onreadystatechange = function() {

		if( xhr.readyState > 3 && xhr.status === 200 ) {

			success( xhr.responseText );

		}

	};

	xhr.setRequestHeader( 'X-Requested-With', 'XMLHttpRequest' );

	xhr.send();

	return xhr;

};

GLSR.isNumeric = function( value ) {

	return !( isNaN( parseFloat( value )) || !isFinite( value ));

};

GLSR.isString = function( str ) {

	return Object.prototype.toString.call( str ) === '[object String]';

};

GLSR.on = function( type, el, handler ) {

	if( GLSR.isString( el )) {

		el = document.querySelectorAll( el );

	}

	[].forEach.call( el, function( node ) {

		node.addEventListener( type, handler );

	});

};

GLSR.off = function( type, el, handler ) {

	if( GLSR.isString( el )) {

		el = document.querySelectorAll( el );

	}

	[].forEach.call( el, function( node ) {

		node.removeEventListener( type, handler );

	});

};

/**

 * Adapted from https://github.com/bitovi/jquerypp/blob/master/dom/form_params/form_params.js

 */

GLSR.parseFormData = function( form, convert ) {

	convert = !!convert || false;

	var keyBreaker = /[^\[\]]+/g; // used to parse bracket notation

	var data = {};

	var seen = {}; // used to uniquely track seen values

	var nestData = function( field, data, parts, seenName )

	{

		var name = parts.shift();

		// Keep track of the dot separated fullname

		seenName = seenName ? seenName + '.' + name : name;

		if( parts.length ) {

			if( !data[ name ] ) {

				data[ name ] = {};

			}

			// Recursive call

			nestData( field, data[ name ], parts, seenName );

		}

		else {

			// Convert the value

			var value = convert ? GLSR.convertValue( field.value ) : field.value;

			// Handle same name case, as well as "last checkbox checked" case

			if( seenName in seen && field.type !== 'radio' && !data[ name ].isArray()) {

				if( name in data ) {

					data[ name ] = [ data[name] ];

				}

				else {

					data[ name ] = [];

				}

			}

			else {

				seen[ seenName ] = true;

			}

			// Finally, assign data

			if( ['radio','checkbox'].indexOf( field.type ) !== -1 && !field.checked )return;

			if( !data[ name ] ) {

				data[ name ] = value;

			}

			else {

				data[ name ].push( value );

			}

		}

	};

	for( var i = 0; i < form.length; i++ ) {

		var field = form[i];

		if( !field.name || field.disabled || ['file','reset','submit','button'].indexOf( field.type ) !== -1 )continue;

		var parts = field.name.match( keyBreaker );

		if( !parts.length ) {

			parts = [ field.name ];

		}

		nestData( field, data, parts );

	}

	return data;

};

GLSR.postAjax = function( url, data, success ) {

	var params = typeof data !== 'string' ? GLSR.serialize( data ) : data;

	xhr.open( 'POST', url ); // asynchronously

	xhr.onreadystatechange = function() {

		if( xhr.readyState > 3 && xhr.status === 200 ) {

			success( JSON.parse( xhr.responseText ));

		}

	};

	xhr.setRequestHeader( 'X-Requested-With', 'XMLHttpRequest' );

	xhr.setRequestHeader( 'Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8' );

	xhr.send( params );

	return xhr;

};

GLSR.ready = function( fn ) {

	if( typeof fn !== 'function' )return;

	// in case the document is already rendered

	if( document.readyState !== 'loading' ) {

		fn();

	}

	// modern browsers

	else if( document.addEventListener ) {

		document.addEventListener( 'DOMContentLoaded', fn );

	}

	// IE <= 8

	else {

		document.attachEvent( 'onreadystatechange', function() {

			if( document.readyState === 'complete' ) {

				fn();

			}

		});

	}

};

GLSR.serialize = function( obj, prefix ) {

	var str = [];

	for( var property in obj ) {

		if( !obj.hasOwnProperty( property ))continue;

		var key = prefix ? prefix + '[' + property + ']' : property;

		var value = obj[ property ];

		str.push( typeof value === 'object' ?

			GLSR.serialize( value, key ) :

			encodeURIComponent( key ) + '=' + encodeURIComponent( value )

		);

	}

	return str.join( '&' );

};

GLSR.insertAfter = function( el, tag, attributes ) {

	var newEl = GLSR.createEl( tag, attributes );

	el.parentNode.insertBefore( newEl, el.nextSibling );

	return newEl;

};

GLSR.appendTo = function( el, tag, attributes ) {

	var newEl = GLSR.createEl( tag, attributes );

	el.appendChild( newEl );

	return newEl;

};

GLSR.createEl = function( tag, attributes ) {

	var el = ( typeof tag === 'string' ) ? document.createElement( tag ) : tag;

	attributes = attributes || {};

	for( var key in attributes ) {

		if( !attributes.hasOwnProperty( key ) )continue;

		el.setAttribute( key, attributes[ key ] );

	}

	return el;

};