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Welcome back.

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Let's get started with the final project.

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That is the API creation for this section.

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We are going to write all the content or data onto a file using the FS module from Node.js.

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Well, so let's get started.

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The first thing is we are going to create a utility function to create folder and files dynamically.

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Again, we can do it manually by right clicking and click on name folder and the name of the folder.

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And after that I can go ahead and create a file called post dot JSON file.

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But let's make use of our knowledge in Node.js to create the folders and files dynamically.

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So at the root of my projects, let's create a file called Utils dot js and you are going to create

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two functions to create a folder and a file dynamically.

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So we need the FS module to get it done.

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So let's require the FS module and here we go.

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So let's give a beautiful comment here says create folder.

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And here is a function.

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I'm going to use every function in this time around we can make use of normal function call and for

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this function we pass a the folder that we want to create.

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So I'll call this one as folder name.

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So inside here we are going to write the code in synchronous way.

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Why?

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Simply because we want to create the folder before even the server gets started.

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Because the application depends on this folder and the file.

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So we are going to make user for a synchronous way.

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So inside here first let's check if the folder exists.

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So here check if folder.

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Exist.

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So here we go, Eve.

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And then f s we have a method called exist sync synchronize, then pass in the folder name.

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So here, if it doesn't exist.

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So let's inject it.

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So if it doesn't exist, then we can go ahead and create the folder too.

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Here you go.

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Create the folder and you are going to use the synchronous way making use of k d r sync and then the

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name of the folder are past in the folder name.

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Now I'm done with the folder creation.

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What about creating a file function?

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So here are going to be create file.

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And here we go.

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Const.

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Kong creates file every function as that for file creation.

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First you need to pass in the file we want to create and then the content that you want to write onto

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the file because the FS module requires us to pass in these two arguments.

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So now inside the function body here again, let's check if file exists as we did in the folder creation

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function.

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So the same process begins of Eve, then f s dot exit sync and in here we pass in the path of the file

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that we want to check.

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And then if it doesn't exist, then we can go ahead and then write the content onto the file.

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So here let's inject it.

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So now inside the function body here.

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Remixes of F.

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S Dart, right file, sync and pass in the file you want to create, and then the content you want to

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write onto the file.

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So let's go ahead and then export these two functions.

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So here export equal to object because we have multiple functions here.

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The first one going to be create folder and then create file.

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So here let's require those functions so equal to required and then it's inside the utils file.

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So here let's do structure and get those two files, create file and then create folder, but make sure

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that your server is not running.

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So let me clear the console here and shut down.

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I'll show you why because I want to see it being creating when we started manually.

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All right.

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So now let's come here and say that create.

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And here you go.

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Going to be great fodder.

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And I want to create a folder called Data.

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If we see that here, there is no folder.

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But as soon as I restart a server here, now check it out.

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You see that we have the folder being created.

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So it is function.

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I can create different folders.

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Let's say public folder here.

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Save it now it has created I can create subfolder.

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So now inside a public folder I can create a folder called as I see save it.

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And now you see I have a C folder I can also create, let's say CSS folder into it.

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And now we see that I have these two folders, but I want the data for the OLLI.

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So let me move this one and then let me provide data.

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Now I'm done with the folder creation.

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The next step is I need to create the file.

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So let me move this forward because I don't need it in this particular project.

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Next is create file, function, create file and I'll make use of create file.

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And this function takes in two things.

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Look at IntelliSense, the file and the content.

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So here I want to create a file inside the data folder here.

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So I provide data for a slash and then the name of the file is going to be post JSON file.

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The next argument is going to be the contents.

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Let me say content here for the entire colon contents here.

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All right.

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So let's save it and let's see, I've saved it.

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The seven password restarted.

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So let's see if there will be an error.

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No error.

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So let's open the folder and I have the file and we have the contents on that bad guys because we are

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going to deal with post with an array and must be in adjacent data and upon server restarting of the

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application.

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These functions will not be called by the user, but instead we need to start it automatically.

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So instead of providing this text here, let's provide a sample array of posts.

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So back to the utils here.

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We are going to make changes to this function.

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Now let's provide a default post here.

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So here we go.

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Const defaults.

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Default.

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Post.

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Is equal to a ray and then going to be a JSON format.

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So here we go.

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First we provide the ID of the post.

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For the meantime, let's give it as 2020 as the ID and come on because it's JSON, the property and

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the value must be in code.

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The next property is called a title and now let's give it a title, let's say a HTML then comma.

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The next property is the u r of the post and let's provide a http colon voice for slash.

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Let's see some.

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You are a dotcom.

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The next property is going to be the description must be in double coat description of the post and

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let's say description going to be the best.

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All right.

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If I save it, it's going to change everything into objects.

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So let's save it and see.

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When I save it, it's going to change the JSON format into objects.

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So let's save it and we see that as we move the code around it.

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So we need to wrap everything into a code so that we see it as a string.

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Let me undo.

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And now let's wrap everything in code or double code.

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So here we go.

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If I save it, I still see the JSON format.

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So now for this function, we don't need to pass in the content upon column because I'm going to pass

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it here to the function call here.

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Now, here we go.

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So if I say we have saved a file, now let's see.

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You could see that I don't see the post here because the file exists, so it's going to create again.

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So let's remove the file.

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And now when I save it, save it and going to create the post here when I open it, I have the post

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here.

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So with this one I can go ahead and make a request to fetch this post.

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That is it.

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That is crazy, guys.

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So this is how we're able to write a function to create a file and folders dynamically.

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Then this video, let's go ahead and implement a route to fetch this post and display it inside.

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Postman.