refactor(file): adds isFileExists function (#14)

In order to get rid of code duplication

Author: stalniy

index.js

@@ -147,32 +147,24 @@ function Angular2ConventionsLoader(source, sourcemap){
 var_hasHtmlFile;
 // if selector and filename are the same
 if(hasSameFileSelector){
-try{
-_hasHtmlFile=fs.statSync(path.join(self.context,lastFileName+htmlExtension));
-}catch(e){}
+_hasHtmlFile=isFileExist(path.join(self.context,lastFileName+htmlExtension))
 }else{
-try{
-_hasHtmlFile=fs.statSync(path.join(self.context,relativePathStart+__selector+htmlExtension));
-}catch(e){
-metadata='template: "",'+metadata;
-}
+_hasHtmlFile=isFileExist(path.join(self.context,relativePathStart+__selector+htmlExtension))
 }
 // set file in metadata
 if(_hasHtmlFile){
 metadata='template: require("'+relativePathStart+lastFileName+htmlExtension+'"),\n'+metadata;
+}else{
+metadata='template: "",'+metadata;
 }
 }
 // do the same for styles
 if(decorator==='Component'&&!(/styles\s*:(\s*\[[\s\S]*?\])/g.test(metadata))){
 var_hasCssFile;
 if(hasSameFileSelector){
-try{
-_hasCssFile=fs.statSync(path.join(self.context,lastFileName+cssExtension));
-}catch(e){}
+_hasCssFile=isFileExist(path.join(self.context,lastFileName+cssExtension))
 }else{
-try{
-_hasCssFile=fs.statSync(path.join(self.context,relativePathStart+__selector+cssExtension));
-}catch(e){}
+_hasCssFile=isFileExist(path.join(self.context,relativePathStart+__selector+cssExtension));
 }
 
 if(_hasCssFile){
@@ -195,4 +187,12 @@ function Angular2ConventionsLoader(source, sourcemap){
 };
 Angular2ConventionsLoader.default=Angular2ConventionsLoader;
 
+functionisFileExist(path){
+try{
+return!!fs.statSync(path);
+}catch(e){
+returnfalse;
+}
+}
+
 module.exports=Angular2ConventionsLoader