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Welcome back, my friends will come to another lecture.

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This is an important lecture because we got to start working on the module that we haven't touched yet.

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And that module is called calories controller.

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And these count calories controller will be four for all of the things that are related with calories,

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adding, burning calories, storing the calories.

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And we need to talk.

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How are we going to store this data?

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All right.

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So we know that we are returning object with some data from the form, what the user have input it,

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but we need to find a way how we can store it.

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So one of the simplest way that we can store calories for different for four different burning or adding

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is to use Herries.

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And yeah, we can just use and there is so we can create two areas here, for example, variable add

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calories and that will be an empty array.

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We have to initialize it to an empty array and sugar like that.

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And the second one for will be for the burn calories.

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Right.

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But I'm not going to waste your time and I'm going to just cut to the main part.

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Instead of having these add calories and burn calories as a two separate area, what we can do, we

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can create an object because we're dealing with objects a lot of time so we can create an object that

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will hold these two here.

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Right.

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So are we can do this, just going to cut them and I'm going to create variable storage.

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And this actually will be an object where we hold all of our data.

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And I'm going to pass this to here.

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Now, there's not going to work in like this because inside these add calories and burn calories, they

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are related with calories.

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Doesn't matter what we do with them, they are just related with calories.

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So I can store them inside another object.

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I can create this one and I'm just going to make move that will make my life easier.

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So I'm going to say all calories and I will create an additional object here.

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And I will say I'm just going to grab this for I don't need more anymore.

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Add calories.

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It will be simple and in the other one will be simple.

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Burn, right.

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So this is what we can do and here should be comma, right?

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So this is how we we will define storage, right?

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So maybe it's a little bit confusing.

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You don't see the end right now, but we create an object that will hold all of the calories regarding

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if it's burning or adding.

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And we're going to store values for adding calories and burning inside an additional an object that

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will call all the calories.

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And we will have to here inside we will have to arrest.

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One will be for when we add in calories, the other one will hold the values for when we are burning

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calories, when we are doing an exercise.

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Now, because this is a private and I will not be able to access it.

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So what we need to do is actually we need to return it.

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Right.

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So we need to return and I'm going to see a result here.

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You don't need we don't need this one, but it's going to be good for our testing and I'm just going

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to return to storage.

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Right now, we need to discuss one more thing, the other thing that we need to discuss, everything

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here that wants to be returned will be in this public methods here.

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Right.

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So one thing that we need to discuss is actually how we are going to store them, what we are going

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to use.

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So, for example, for each gallery, we we what we need, actually, these intellectual property,

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initialise are like eight.

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So he's giving me a problem here.

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Why?

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Because he don't use equal educed, you do need to use this these Colonie, right?

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Because we're dealing with objects and this is how we write the properties.

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OK, that should be done fixed.

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So if you if I if it caused some misunderstanding.

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But that's pretty much when you copy and paste things right now here we need to work.

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We need to find a very easy solution because each gallery look at this, each gallery I will form,

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it's telling us we need to have a type description, quantity, calories.

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Right.

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But each and every calorie should have unique and separate identifier, whether it's for food or for

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exercise.

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They need to have some identifier.

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And by an identifier, I mean they need to have unique I.D. So the best way, again, is to use an object

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to hold this data and object for adding calories, an object for burning calories.

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But the solution is that we can use function constructor here and when we having functions constructor's,

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we can create and more instances of add calories object.

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Right.

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Instead of having tons of objects.

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That's why the functions constructor would there.

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So we can easily use we can write them and we can usually instantiate them and we can use as many objects

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as we need.

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Right.

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So how are we going to write this function?

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I hope you understand why we didn't learn, for example, function constructor before, because now

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we need to use it.

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And this is the way we write the functions.

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Constructor right now, this function constructor will be for adding calories.

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She's going to make a new one for burning calories.

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Right.

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If they start with a capital letter right now, they do have ideas.

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They do have the description.

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What else?

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We have calories in quantity.

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Right.

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Which is good.

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Copy the same on the same goes for burning calories.

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It's a pretty much identical in how we write them.

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We use these that idea it will be equal to I'd write these, that description.

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It will be equal to the description and what else we have these that calories equal to the calories.

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Come on.

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It's messing with me.

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This is not quantity.

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It will be equal to the quantity that we have passed here through these parameters, and I'm going to

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copy this one, I'm going to save my time.

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I'm going to save it.

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So I do have now two functions constructor's.

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And remember, before we did have the methods and you write those methods inside the property, prototype

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property and after that, all of the instances.

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So how we instance actually remember.

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So, for example, were, I don't know, at sea, it will be equal to new ad Kalari.

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That's how we tried this one.

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And we're passing here like one five and I'm not going to show it to you right now.

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So this is how we create an object.

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We instantiate an object from this.

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If you haven't.

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If you forgot.

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Don't worry.

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We will refresh your memory like this.

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So that's pretty much it.

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This is how our calories module controller will look like.

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We will have function constructor for both and we have a storage will restore from each objects that

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we create here.

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Right.

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And we will do that one in this areas in the lecture now we return to storage so we can just check if

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calories control or not result.

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And that should return an object called all calories.

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Right, because it's we are returning the storage.

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So that is pretty much cool.

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Now, we do have inside all calories.

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We do have an array that is empty when you have another burn area that is empty as well.

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Right.

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When we feel some data inside, you will see this and it will be different.

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But we're going to do the targeting.

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We're going to just in here and miss something.

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But don't worry, I don't want to put the top here, but we're going to use that type.

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This type.

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Oops, sorry, we're going to use the tab here, determine if it's food or exercise, then we're going

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to save in a separate area.

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So I hope you understand I'm not using the type here.

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It's not necessary because that that we should we we don't care where it's stored because it will go

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straight to its it's airy.

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And this time we will use it.

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We will check whether it's a food, then we will add it.

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If it's exercise then we will burn it.

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Right, then we will burn calories.

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But that is for the next lecture and we will see how we can add an item in that will be something special

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because our application is starting to make sense.

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Our application is starting to grow.

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Yeah, we have done a lot of things.

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So if you go from here until there, you will see that we have done a lot of things and put a comments,

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the comments in your report in your from you.

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I would put as much as I can.

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But you should also put your comments because you can refer back to those comments in each and every

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lecture you can probably copy and create here new file called Lecture One and see what we have done

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in this lecture.

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Another lecture, save it there.

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And you can have like a versions.

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You can see how we progressed from the first one and how we got it through to here, because in future,

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if you want to try to do it by yourself, you will not know where you need to start.

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You need to start from here.

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Right.

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We need to add event listeners.

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All you need to start from app.

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You are controller.

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That's what I'm trying to say.

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So that's pretty much it.

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I hope you enjoyed this one and I will see you in the next one.