node-ff-assets
=========

A Node.js library providing automatic site assets aggregation and content modifiers.

## Installation

  npm install node-ff-assets --save

## Target/Source locations

  The asset target file location is a derived value.
  Its created by mapping the buildConfig.linkTarget in the buildConfig.linkMapping keys
  to get a prefix for the local file system location.
  The same is also true for the buildConfig.linkSources list which are url paths
  which need to be mapped to the file system files by the buildConfig.linkMapping data.
  
	linkTarget: '/static/js/ffa/assets.js',
	linkMapping: ['/static/':'www_static/',],
	linkSources: ['/static/js/site.js','/static/js/ffa/jquery-2.1.3/jquery.js@http://code.jquery.com/jquery-2.1.3.js'],
  Gives;
    public js  file: http://localhost:8080/static/js/site.js
    public js  file: http://localhost:8080/static/js/ffa/assets.js
    public js  file: http://localhost:8080/static/js/ffa/jquery-2.1.3/jquery.js
    filesystem file: www_static/js/site.js
    filesystem file: www_static/js/ffa/assets.js
    filesystem file: www_static/js/ffa/jquery-2.1.3/jquery.js
    .gitignore line: www_static/js/ffa
  
  if buildConfig.linkTargetSingleResult = true render
    static/js/ffa/assets.js
  else
    static/js/site.js
    static/js/ffa/jquery-2.1.3/jquery.js

## Usage

	// Create config object
	var buildConfig = {
		downloadStartDelay: null,
		downloadForce: false,
		downloadOptions: {
			timeout: 10000,
			maxResponseLength: 10000000,
			agent: 'node-ff-assets asset fetcher'
		},
		
		linkTargetSingleResult: true,
		linkTarget: '/static-uri/js/assets.js',
		linkSources: [
			'/static/js/lib/jquery-2.1.3/jquery.js@http://code.jquery.com/jquery-2.1.3.js',
			'/static/js/lib/foobar/dyna.js@@http://localhost/force-download-on-every-build-for-this-file.js',
			'/static/js/site.js'
			],
		linkMapping: ['/static-uri/':'www_static/',],
		
		assetHeader: '\n/* node-ff-assets: begin */\n\n',
		assetFooter: '\n/* node-ff-assets: end */\n\n',
		assetSeperator: '\n/* node-ff-assets: next */\n',
	}
	
	// Development override, targets still gets build but result is full list of assets.
	buildConfig.linkTargetSingleResult = false;
	
	// Push local js/css files as uri sources into config
	NodeFFAssets.pushLinkSourcesSync(buildConfig,  '/static-uri/js/',           'www_public/js/');
	NodeFFAssets.pushLinkSourcesSync(buildConfig,  '/static-uri/js/model/',     'www_public/js/model/');
	NodeFFAssets.pushLinkSourcesSync(buildConfig,  '/static-uri/js/model/meta', 'www_public/js/model/meta');
	
	// Require library
	var NodeFFAssets = require('node-ff-assets');
	
	// Create simpel builder
	var assetBuilderA = new NodeFFAssets.ResourceBuilder(buildConfig);
	
	// Same as default, plain inclusion of content.
	var assetBuilderB = new NodeFFAssets.ResourceBuilder(buildConfig,NodeFFAssets.FunctionFactory.Constructor.readFile());
	
	// Minify content, with optional Minify config options.
	var assetBuilderC = new NodeFFAssets.ResourceBuilder(buildConfig,NodeFFAssets.FunctionFactory.Constructor.readFileMinify());
	var assetBuilderD = new NodeFFAssets.ResourceBuilder(buildConfig,NodeFFAssets.FunctionFactory.Constructor.readFileMinify(minifyOptions));
	
	// Third party content modifiers, with readFile function
	var assetBuilderE = new NodeFFAssets.ResourceBuilder(buildConfig,function(file,callback) {
		// should return file data to callback(err,data);
	);
	
	// Hook events
	assetBuilderA.on('begin',               function() { });
	assetBuilderA.on('end',                 function() { });
	assetBuilderA.on('log',                 function(logLevel, logMessage) { });
	assetBuilderA.on('error',               function(err) { });
	assetBuilderA.on('result',              function(resultValue) { });
	assetBuilderA.on('file-download-pre',   function(remoteUrl) { });
	assetBuilderA.on('file-download-post',  function(localFile) { });
	assetBuilderA.on('file-read-pre',       function(localFile) { });
	assetBuilderA.on('file-read-post',      function(localFile) { });
	assetBuilderA.on('file-write-pre',      function(targetFile) { });
	assetBuilderA.on('file-write-post',     function(targetFile) { });
	
	// Use build in event functions
	assetBuilderB.on('log',     NodeFFAssets.FunctionFactory.Event.log.console('css'));
	assetBuilderB.on('result',  NodeFFAssets.FunctionFactory.Event.result.objectSet(server,'includeCssFiles'));
	
	// Run builder
	assetBuilderC.run(function(err) {
		//done
	});
	
	// Run all builders
	NodeFFAssets.runAll([
		assetBuilderA,
		assetBuilderB,
		assetBuilderC,
		], function(err) {
			// all done
		});
	
	// Render result
	function renderIndex(app) {
		return function (req, res, next) {
			res.render('index', {
				includeCssFiles:    app.get('includeCssFiles'),
				includeJsFiles:     app.get('includeJsFiles'),
			});
		}
	};
	app.get('/',renderIndex(app));
	
	// Template
	index.jade
		doctype html
		html(lang='en',ng-app='ffUI')
		  head
		    base(href='/ui')
		    title=title
		    meta(charset='UTF-8')
		    meta(http-equiv='X-UA-Compatible' content='IE=edge')
		    meta(name='viewport' content='width=device-width, initial-scale=1')
		    meta(name='keywords' content=keywords)
		    each cssFile in includeCssFiles
		      link(rel='stylesheet' href='#{cssFile}')
		  body
		    div(id='wrapper')
		      div(ng-include='\'/ui/include/html/layout/header\'')
		      div(id='page-wrapper')
		        div(id='container-fluid')
		          div(ng-view)
		    div(ng-include='\'/ui/include/html/layout/footer\'')
		    each jsFile in includeJsFiles
		      script(src='#{jsFile}')


## Example mapping node_modules

  Some js libraries can be directly served from node_packages and thus also be
  included the node-ff-assets output, but these required there own reverse mapping;
  
	'/static/module/bootstrap/': 'node_modules/bootstrap/dist/',

  This will let the parse find the /static/module/bootstrap/css/bootstrap.css resource and
  maps it the local file; node_modules/bootstrap/dist/css/bootstrap.css

	// note1: www_static/[js/css]/lib is versioned ingored.
	// note2: server routes;
	//   app.use('/static',express.static(path.join(__dirname,'www_static')));
	//   app.use('/static/module/bootstrap',express.static(path.join(__dirname,'node_modules/bootstrap/dist')));
	
	var NodeFFAssets = require('node-ff-assets');
	var buildCss = new NodeFFAssets.ResourceBuilder({
		linkMapping: {
		    '/static/module/bootstrap/': 'node_modules/bootstrap/dist/',
		    '/static/':                  'www_static/',
		},
		linkTarget: '/static/css/lib/assets.css',
		linkSources: [
		              '/static/module/bootstrap/css/bootstrap.css',
		              '/static/css/site.css',
		              ],
	});
	buildCss.on('log',     NodeFFAssets.FunctionFactory.Event.log.console('css'));
	buildCss.on('result',  NodeFFAssets.FunctionFactory.Event.result.objectSet(server,'includeCssFiles'));
	buildCss.run(function(err) {
		// done
	})
	
	// Render result as in usage example.
	
	
## Example complex

	var LogWinston     = require('winston');
	var Log            = LogWinston.loggers.get('main');
	var Mongoose       = require('mongoose');
	var NodeFFAssets   = require('node-ff-assets');
	
	function createBuildConfig(type) {
		var singleResult = 'false' != process.env.DEV_ASSETS_SINGLE_RESULT;
		var linkMapping = {
			    '/static/module/bootstrap/': 'node_modules/bootstrap/dist/',
			    '/static/module/flot/':      'node_modules/flot/',
			    '/static/':                  'www_static/',
			}
		if (type == 'css') {
			return {
				linkMapping: linkMapping,
				linkTargetSingleResult: singleResult,
				linkTarget: '/static/css/lib/assets.css',
				linkSources: [
				              '/static/module/bootstrap/css/bootstrap.css',
				              ],
			};
		} else {
			return {
				downloadStartDelay: 200,
				linkTargetSingleResult: singleResult,
				linkMapping: linkMapping,
				linkTarget: '/static/js/lib/assets.js',
				linkSources: [
				              '/static/js/lib/jquery-2.1.3/jquery.js@http://code.jquery.com/jquery-2.1.3.js',
				              '/static/module/bootstrap/js/bootstrap.js',
				              '/static/module/flot/jquery.flot.js',
				              '/static/module/flot/jquery.flot.resize.js',
				              '/static/module/flot/jquery.flot.pie.js',
				              '/static/js/lib/angularjs-1.4.0-b4/angular.js@https://code.angularjs.org/1.4.0-beta.4/angular.js',
				              '/static/js/lib/angularjs-1.4.0-b4/angular-route.js@https://code.angularjs.org/1.4.0-beta.4/angular-route.js',
				              '/static/js/lib/angularjs-1.4.0-b4/angular-resource.js@https://code.angularjs.org/1.4.0-beta.4/angular-resource.js',
				              '/static/js/lib/angularjs-1.4.0-b4/angular-touch.js@https://code.angularjs.org/1.4.0-beta.4/angular-touch.js',
				              ],
			};
		}
	}
	
	function createBuildLogger(logType) {
		return function(logLevel, logMessage) {
			Log.log(logLevel, 'node-ff-assets-'+logType+' '+logMessage);
		}
	};
	
	function buildAssets(server,callback) {
		// Create asset config
		var buildJsConfig = createBuildConfig('js');
		var buildCssConfig = createBuildConfig('css');
		
		// Extends js/css lists with local folders
		NodeFFAssets.pushLinkSourcesSync(buildJsConfig,  '/static/js/',              'www_static/js/');
		NodeFFAssets.pushLinkSourcesSync(buildJsConfig,  '/static/js/controller/',   'www_static/js/controller/');
		NodeFFAssets.pushLinkSourcesSync(buildCssConfig, '/static/css/',             'www_static/css/');
		
		// Extend js list with crud entries
		var localPort = server.get('server config').options.http.port;
		var modelNames = Mongoose.connection.modelNames();
		for (i = 0; i < modelNames.length; i++) {
			var modelName = modelNames[i];
			var assetLink = '/static/js/lib/xcrud/'+modelName+'.js@@http://localhost:'+localPort+'/ui/include/js/controller/'+modelName;
			buildJsConfig.linkSources.push(assetLink);
		}
		
		// Create builders
		var buildJs  = new NodeFFAssets.ResourceBuilder(buildJsConfig); // note: Minify fails here on some js.
		var buildCss = new NodeFFAssets.ResourceBuilder(buildCssConfig,NodeFFAssets.FunctionFactory.Constructor.readFileMinify());
		
		// Config build events
		buildJs.on ('log',     createBuildLogger('js'));
		buildCss.on('log',     createBuildLogger('css'));
		buildJs.on ('result',  NodeFFAssets.FunctionFactory.Event.result.objectSet(server,'includeJsFiles'));
		buildCss.on('result',  NodeFFAssets.FunctionFactory.Event.result.objectSet(server,'includeCssFiles'));
		
		// Run builders
		NodeFFAssets.runAll([buildCss,buildJs],callback);
	}
	
	exports.build = function(server) {
		buildAssets(server,function() {
			Log.info('Server init done.');	
		});
	}
	
	// Result First run
	info: node-ff-assets-css build begin for: /static/css/lib/assets.css
	debug: node-ff-assets-css readFile: node_modules/bootstrap/dist/css/bootstrap.css size: 285496
	debug: node-ff-assets-css readFile: www_static/css/boot.css size: 1606
	debug: node-ff-assets-css readFile: www_static/css/flot.css size: 82
	debug: node-ff-assets-css readFile: www_static/css/panel.css size: 545
	debug: node-ff-assets-css readFile: www_static/css/style.css size: 10419
	debug: node-ff-assets-css target size: 298318
	info: node-ff-assets-css build result size: 1 from: 5
	info: node-ff-assets-css build done in: 33 ms.
	info: node-ff-assets-js build begin for: /static/js/lib/assets.js
	debug: node-ff-assets-js downloadFile: http://code.jquery.com/jquery-2.1.3.js
	debug: node-ff-assets-js downloadFile: https://code.angularjs.org/1.4.0-beta.4/angular.js
	debug: node-ff-assets-js downloadFile: https://code.angularjs.org/1.4.0-beta.4/angular-route.js
	debug: node-ff-assets-js downloadFile: https://code.angularjs.org/1.4.0-beta.4/angular-resource.js
	debug: node-ff-assets-js downloadFile: https://code.angularjs.org/1.4.0-beta.4/angular-touch.js
	debug: node-ff-assets-js downloadFile: http://localhost:8008/ui/include/js/controller/test1
	GET /ui/include/js/controller/test1 200 7.931 ms - -
	debug: node-ff-assets-js downloadFile: http://localhost:8008/ui/include/js/controller/test2
	GET /ui/include/js/controller/test2 200 5.215 ms - -
	debug: node-ff-assets-js downloadFile: http://localhost:8008/ui/include/js/controller/test3
	GET /ui/include/js/controller/test3 200 1.583 ms - -
	debug: node-ff-assets-js readFile: www_static/js/lib/jquery-2.1.3/jquery.js size: 247387
	debug: node-ff-assets-js readFile: node_modules/bootstrap/dist/js/bootstrap.js size: 66732
	debug: node-ff-assets-js readFile: node_modules/flot/jquery.flot.js size: 110008
	debug: node-ff-assets-js readFile: node_modules/flot/jquery.flot.resize.js size: 2504
	debug: node-ff-assets-js readFile: node_modules/flot/jquery.flot.pie.js size: 23405
	debug: node-ff-assets-js readFile: www_static/js/lib/angularjs-1.4.0-b4/angular.js size: 988198
	debug: node-ff-assets-js readFile: www_static/js/lib/angularjs-1.4.0-b4/angular-route.js size: 35796
	debug: node-ff-assets-js readFile: www_static/js/lib/angularjs-1.4.0-b4/angular-resource.js size: 26780
	debug: node-ff-assets-js readFile: www_static/js/lib/angularjs-1.4.0-b4/angular-touch.js size: 22887
	debug: node-ff-assets-js readFile: www_static/js/app-directives.js size: 185
	debug: node-ff-assets-js readFile: www_static/js/app-filters.js size: 202
	debug: node-ff-assets-js readFile: www_static/js/app-services.js size: 80
	debug: node-ff-assets-js readFile: www_static/js/app.js size: 766
	debug: node-ff-assets-js readFile: www_static/js/controller/page-about.js size: 364
	debug: node-ff-assets-js readFile: www_static/js/controller/page-foobar.js size: 361
	debug: node-ff-assets-js readFile: www_static/js/controller/page-index.js size: 351
	debug: node-ff-assets-js readFile: www_static/js/controller/page-help.js size: 376
	debug: node-ff-assets-js readFile: www_static/js/lib/xcrud/test1.js size: 2010
	debug: node-ff-assets-js readFile: www_static/js/lib/xcrud/test2.js size: 2138
	debug: node-ff-assets-js readFile: www_static/js/lib/xcrud/test3.js size: 2218
	debug: node-ff-assets-js target size: 1540945
	info: node-ff-assets-js build result size: 1 from: 24
	info: node-ff-assets-js build done in: 3497 ms.
	info: Server init done.
	
	// Result Next runs
	info: node-ff-assets-css build begin for: /static/css/lib/assets.css
	debug: node-ff-assets-css readFile: node_modules/bootstrap/dist/css/bootstrap.css size: 285496
	debug: node-ff-assets-css readFile: www_static/css/boot.css size: 1606
	debug: node-ff-assets-css readFile: www_static/css/flot.css size: 82
	debug: node-ff-assets-css readFile: www_static/css/panel.css size: 545
	debug: node-ff-assets-css readFile: www_static/css/style.css size: 10419
	debug: node-ff-assets-css target size: 298318
	info: node-ff-assets-css build result size: 1 from: 5
	info: node-ff-assets-css build done in: 36 ms.
	info: node-ff-assets-js build begin for: /static/js/lib/assets.js
	debug: node-ff-assets-js downloadFile: http://localhost:8008/ui/include/js/controller/test1
	GET /ui/include/js/controller/test1 200 7.931 ms - -
	debug: node-ff-assets-js downloadFile: http://localhost:8008/ui/include/js/controller/test2
	GET /ui/include/js/controller/test2 200 5.215 ms - -
	debug: node-ff-assets-js downloadFile: http://localhost:8008/ui/include/js/controller/test3
	GET /ui/include/js/controller/test3 200 1.583 ms - -
	debug: node-ff-assets-js readFile: www_static/js/lib/jquery-2.1.3/jquery.js size: 247387
	debug: node-ff-assets-js readFile: node_modules/bootstrap/dist/js/bootstrap.js size: 66732
	debug: node-ff-assets-js readFile: node_modules/flot/jquery.flot.js size: 110008
	debug: node-ff-assets-js readFile: node_modules/flot/jquery.flot.resize.js size: 2504
	debug: node-ff-assets-js readFile: node_modules/flot/jquery.flot.pie.js size: 23405
	debug: node-ff-assets-js readFile: www_static/js/lib/angularjs-1.4.0-b4/angular.js size: 988198
	debug: node-ff-assets-js readFile: www_static/js/lib/angularjs-1.4.0-b4/angular-route.js size: 35796
	debug: node-ff-assets-js readFile: www_static/js/lib/angularjs-1.4.0-b4/angular-resource.js size: 26780
	debug: node-ff-assets-js readFile: www_static/js/lib/angularjs-1.4.0-b4/angular-touch.js size: 22887
	debug: node-ff-assets-js readFile: www_static/js/app-directives.js size: 185
	debug: node-ff-assets-js readFile: www_static/js/app-filters.js size: 202
	debug: node-ff-assets-js readFile: www_static/js/app-services.js size: 80
	debug: node-ff-assets-js readFile: www_static/js/app.js size: 766
	debug: node-ff-assets-js readFile: www_static/js/controller/page-about.js size: 364
	debug: node-ff-assets-js readFile: www_static/js/controller/page-foobar.js size: 361
	debug: node-ff-assets-js readFile: www_static/js/controller/page-index.js size: 351
	debug: node-ff-assets-js readFile: www_static/js/controller/page-help.js size: 376
	debug: node-ff-assets-js readFile: www_static/js/lib/xcrud/test1.js size: 2010
	debug: node-ff-assets-js readFile: www_static/js/lib/xcrud/test2.js size: 2138
	debug: node-ff-assets-js readFile: www_static/js/lib/xcrud/test3.js size: 2218
	debug: node-ff-assets-js target size: 1540945
	info: node-ff-assets-js build result size: 1 from: 24
	info: node-ff-assets-js build done in: 105 ms.
	info: Server init done.

## Tests

  npm test (TODO)

## Contributing

In lieu of a formal styleguide, take care to maintain the existing coding style.
Add unit tests for any new or changed functionality. Lint and test your code.

## Release History

* 0.1.2 added objectAdd

* 0.1.1 Doc updates

* 0.1.0 Initial release