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Everybody what's going on this is Caleb with Deb's Lopes dot com.

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And in this video we're going to add a few more functions to our download service Singleton that is

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basically going to convert our array of dictionaries into instances of our repo model using those dictionaries

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which is pretty neat.

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And then we're going to set it up so that we can actually download that data pass it into some cells

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it's going to be super cool.

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Let's go ahead and let's start now.

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Pull open that project.

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And here we go.

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Let's go ahead and below trending repots data.

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Let's go ahead and actually stop that from running.

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Let's close the console and you know what I'm going to make some space here so you can actually see

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what I'm doing.

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And we're going to write a function that is called download trending repo's and we're going to be able

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to call this function here download trending repots directory and it's going to return Of course an

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array of dictionaries.

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Then what we're going to do is we're going to cycle through all those dictionaries and we're going to

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pull out the individual data and then return an instance of repository.

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OK.

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Or repo I guess is the short name.

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So go ahead and call phunk download WIPs download trending repo.

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All right.

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And just like before.

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We're going to use a completion handler that is escaping.

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So go ahead and type completion at escaping and if you missed my explanation in the last video go ahead

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and watch it again back there.

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Basically this handler is going to let us return values within a closure.

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It lets them escape from the closure instead of getting stuck.

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We're going to put that function here and that is the function that we pass those values into.

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It returns an empty function but the return is not what's important what is is the array of repo's.

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And as you remember we are not allowed to use named parameters in function types so we're going to go

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ahead and use an underscore and use the internal parameter of repots array.

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OK.

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And it's going to be an array of type repo like so.

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All right.

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So that's great.

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And that's what we're going to return as an array of type repo.

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So let's go ahead and let's call.

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Download trending repo's Diptera.

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That's our function from this class and go and press enter on that completion handler.

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This is the repo's dict array that we get.

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So we're going to call this trending repots dict.

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And now we have access to this property once it's done downloading.

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We can go ahead and start parsing through all of those dictionaries and doing something with each one

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of them.

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So let's go ahead and let's just say for dict in trending repo's dict array.

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Now we have access to each and every dictionary.

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What we're going to go ahead and do is basically set up each set up.

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Each property needed for instance of repo K and in order to do that I found that it's easier to use

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a function that we can pass in a dictionary parse through it all and then return the repo that we need.

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So let's go ahead and do that by calling phunk download trending repo.

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And you know what.

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This function should have an S for plural because it's going to return more than one download trending

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Ribault with with no s is only going to return one function.

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And so we're going to go ahead and use this function to return a repo like so.

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And you know of course we need to basically download a trending Ribault from a dictionary.

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OK.

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And that's going to be a dictionary of type string and any like so.

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But you know what.

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We need an internal parameter of dep't like so.

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And yeah so let's say that we pass in a dictionary like this one here we pass in a dictionary we're

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going to go ahead and basically create the properties that we need.

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So let's create an instance of repo so that we know what we need to fill in.

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Let Ribault equals repo wups repo.

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And we're going to need an image a name description number of fork's language number of contributors

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and repo you are l.

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So let's go ahead and let's think about what we need for the image.

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We're going to go ahead and just say let avatar you RL And you know what.

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If you remember in the GET have API we have an avatar you are l here and that's going to be the image

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for the user that created this repository.

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So we're going to use avatar you are ill.

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And if you look you'll see that the key name is actually Avatar underscore your L So I'm going to copy

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that and we're going to go ahead and say that that comes from dict and the key of course is named avatar

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you are l.

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Now that Avatar your all comes in as a string.

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And so since we're using a dictionary here we're going to go ahead and just call as string.

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We're going to force cast it as a string just so that it comes in as the exact type we need.

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And now that's going to be used later on.

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We can't yet download images because we have not written that function so we're not going to use it

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yet.

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But it is there.

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So next we need a name so let's just go ahead and type let name and we need one T-nut too.

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And that's going to come from dict K and the property in the actual dictionary is name just like you

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might expect.

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So go ahead and paste in name and cast it as a string.

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Next we need the description with one T.

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And that's going to come from dictionary.

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With square brackets and the description.

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If you go ahead and you look through we have the full name here.

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We have a description at the swift programming language so I'm going to go ahead and just paste in description

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and cast it as a string.

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Ok that's cool.

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And you know what since we're doing this we're going to go ahead and just let's give it the name let's

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give it the description.

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Now we need a number of forks.

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Number of forks is going to be equal to dict.

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We're going to put some quotes there and we're going to cast that as a string eventually.

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And you know what.

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All of these are going to come in as a string.

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So I'm going to copy that and use that later.

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But number of forks if you look you'll see that there is a property somewhere in here called forks right

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here.

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Fork's count.

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So this is the number of times that swift in particular has been forked.

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So go ahead and just remember that fork's underscore count K that's great.

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And we need it to be a string so we're casting it as a string but that's not actually going to work

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because the type that comes in is actually an INT.

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And so we would cause problems if we tried to cast that as a string.

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So what we're going to do is cast that as an integer.

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And now we're going to move on to let language equals dictionary and in quotes we're going to go ahead

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and look for language somewhere in here I believe it actually is up at the top.

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Maybe not

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OK.

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So language is here it says that it's C++.

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That's obviously not correct but for the most part it will be correct.

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So just call language and that's going to be a string.

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Then we need a number of contributors

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K and that whip's contributors and that's going to come from our dictionary.

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The contributor's do you see anything here for a number of contributors I don't.

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And that's because that's not publicly available on the front page.

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But there is a contributor's you r L and K now what we're going to do in the meanwhile is we're just

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going to go ahead and pass in a value for a number of contributors and then later on we're going to

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go ahead and write a function that can download the contributor's data.

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So let's go ahead and set number of forks.

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OK let's go ahead and set language and for a number of contributors let's just set one two three for

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now and then you know what we can set the repo you are I'll as well.

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So let's go ahead and type let repo you r l and that's going to come from the dictionary.

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And the dictionary.

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If you look for Ribault you are l.

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We got a property right here called HVM l u r l k and that is where we get the get hub link.

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So h t m l u r l That's Type that in h t m l u r l and of course that's going to get cast as a string

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and passed in here.

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Wups Ribault you are perfect.

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Now that's great.

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But for the image we're going to go ahead and type you I image and we're gonna call you I image named

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and we're going to pass in a name.

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Now if you remember I don't so that's why I'm going back to look.

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We're going to use search Eikon large just for now and then later when we actually populate it with

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a real image we will use that image of course but we're going to go ahead and unwrap that and get rid

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of this number of contributors for now until we actually need it.

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But then we're going to go ahead and just return the repo because this function is supposed to return

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a repo for us.

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So let's go back to our trending repots function here.

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And we just went through and we set up every property needed for a repository.

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It is a static repository for the image and for the contributors but everything else is coming in from

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the API which is cool.

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So in this function Here's what we're going to do.

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We're going to go ahead and delete this Babai and we're going to go ahead and call self download trending

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repo from dictionary and voila we have one dep't right here from our for loop.

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But remember this function returns a repo.

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So this itself is a repo value.

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So let's just go ahead and call this repo and set it to be equal to our return from our function and

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we need a way to kind of keep track of this because we're going to be returning an array of repo's.

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So let's create a property at the top that we can just start appending these repos to as they come in.

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Let's just say var repots array equals array of repo and we're going to instantiate it.

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And once we create one from our download trending repo we're just going to say repots array append.

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And we're going to pass it the repo just like that.

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But when we're finished we need to basically tell it that we're finished and return our repots array.

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So go ahead and just call completion and pass it the repots array.

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OK we've already set it to be 10.

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We're going to return 10 and upon completion we're going to basically just say all right these replies

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are good to go they're done.

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So let's go ahead let's go call this and let's see if we can get that data.

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Let's just see how we did.

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So let's call it download service.

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Instance whip's instance and we're going to just say download trending repots completion is an array

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of repo so let's just say return or sorry repo array.

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And we're going to go ahead and just print reape it well let's see it's an array of repo's so that we'll

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just print out a bunch of information.

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Why don't we print out the first Ribault and then let's print out.

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Well that should print out all the information so we'll just print out the first one that comes in.

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So go ahead and build and run.

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Let's go see how we did.

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Here we go.

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It's going to build.

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It's going to download all of our stuff and we'll see if we did all right.

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OK.

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Take a look it says fatal error index out of range.

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So that means that we're not getting anything back.

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Let's go ahead and let's build and run again let's make sure that we're just getting an empty array.

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That's probably the problem here.

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Here we go.

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OK.

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Check it out.

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We are getting an empty array and it does not like what we're doing so avatar you are l it is saying

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we are not getting a value for Avatar you are l it's coming in as nil.

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So you know what we're not actually using this.

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So let's go ahead and let's just blank blank that out like so and let's try running this one more time.

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Here we go.

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Let's see if that helps our problem k we get an empty array that's great.

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OK so it appears that not every repository has an avatar you or else so we're going to have to do something

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in a future video to basically only download repositories that do have an avatar you're L..

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But we are getting a bit of a problem here because we are not returning any values and that's because

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again we're completing this outside of our closure.

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So let's go ahead and put our completion at the bottom of our four loop here.

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Let's build and run.

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And that should successfully return our repots array.

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So let's go ahead and let's build it let's run it and let's see if we actually download data.

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OK.

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Look at that.

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So we're printing out the repo's array but it's just showing that these are instances of repo.

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So since we're getting all these repo's Let's count them one two three four five six seven eight nine

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10 11.

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Interesting.

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So we're actually getting 11 back o.

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Right.

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That's because of zero indexing so if we want 10 Let's go hadn't asked for nine.

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All right.

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So download service trending feed Visi let's print out the first item in the repo array and let's see

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all the values that we get when we do that building and running one more time.

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And here we go.

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OK of course sorry.

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Let's actually print out the values.

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How about the name.

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Print out the name.

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OK.

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That'll make a little more sense.

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All right it's building.

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Here we go.

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And we should get swift.

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There we go because remember in Safari here Swift is the first one that we get.

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So we're downloading 10 repositories and they happen to be coming in exactly as we want.

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We are so so close guys in the next video we're going to actually write a function that will download

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the avatar image.

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We're going to download the contributor's data and we're also going to make sure that all of the repositories

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that are coming in have all the properties that we need.

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Otherwise we'll just kick them out.

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So we're going to go ahead and delete this.

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We're going to go ahead and head back to download service and in the next video we're going to make

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it happen.

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Let's go do that.

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00:14:54,560 --> 00:14:57,110
Let's head over to the next video and download all that good stuff.