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Welcome back. Let's finish setting up the last two routes in our server. We first have the '/profile/:userId'

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which is a GET request.

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That is what we want to GET the user for their homepage.

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Let's do that. I'm going to add a other route.

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This time it'll just be a GET request and it's going to accept '/profile/' and an 'id' – remember that if we do

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it with this syntax [:id] that means we can enter in our browser anything and we'll be able to grab this 'id'

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through the 'req.params' property rights.

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We will again do the same thing.

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Request, response

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and let's add a space here to keep things clean.

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And within this request, response we want to first of all grab the parameter 'id' so let's do 'const', 'id'

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will be coming from 'req.params'.

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And what should we do here?

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Well in order to get our users we want to loop through our sample database and find the matching 'id'.

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If it matches

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We want to return the user.

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All right.

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We can avoid it any longer.

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We have to do a 'for' loop here. The way we do that is we can just do 'database.users'

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– although I like using 'map' for this case – we're just looping through the users and we dont really need

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to create a new array – it's just a database and we want to keep that constant so we'll just say 'forEach()'

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and if you remember 'forEach()' will run through the users one at a time and we'll say that if 'user.id'

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which is what will get from that database equals the 'id' that we received from the 'params', if that's

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the case, we will respond with JSON, that user [req.json(user)] – we'll just send the user of the matching 'id' – otherwise

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We will respond with 'req.json('no such user')'.

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And we can even say that its a status of 404, which means 'not found'.

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All right.

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Let's see if this works.

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I'm going to save go back to our example. Well we know that we have '123' and '124'

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and because the server restarted we won't have Ann.

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You want to grab '/profile/123'.

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If we click Send I get '200 OK'.

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-

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All right we got John.

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If I do '124' I get "no such user" if we go back here

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– hmm, Sally should be here.

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How come we're not getting her?

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And we see here that we get an error here:

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'Can't set headers after they are sent.'

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That is because we're looping through this and instead of returning from the loop – because once we find

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the user id – we don't really need to keep looping.

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So here we should just be sending a 'return res.json()'

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and if the user isn't found well you don't necessarily want to do that in the loop, do we?

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We want to say that for each if this user is found 'return res.json()' and we'll say that a variable

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'found', which we'll default to 'false' will also get updated with 'true'

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and it'll have to be a 'let' because we're reassigning it so 'found' will equal to 'true'

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if we find it, and I know there's better ways of doing it.

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But again I think this will illustrate a point.

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We could also do a 'map' or a 'filter' to see if we actually find a person with an 'id'.

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But for now let's just do 'if isn't found' [if(!found)]

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So the opposite of 'found' – in that case we'll just respond with

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'res.status(400).json('not found')'

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Let's give that a go.

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All right.

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I get Sally. If I go '123' I get John – perfect and just for fun let's register

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Ann again. I'm going to hit send and her 'id' is '125'.

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So if I go back to '/profile/' and do '125' I get Ann.

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And how cool is that?

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Awesome.

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So we have this endpoint working and we have one last one which is the image and this one we just wanted

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to update the user to increase their

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'entries' count. Every time they submit an image

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we want to increase their 'entries'.

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Let's do that by creating our final endpoint which is 'app.post()'

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and we'll call it '/image'.

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We'll get a request, response.

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And again here we will have to find the 'id' of the user again.

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To update their entries.

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In this case we can just copy what we've done before and any time we need to copy some sort of a function

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well it's a good time to actually pull it out and create your own function so you can use it in both

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of these.

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But for now let's just copy and paste

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and instead of actually having 'params' in our case we will receive the user's 'id' from the body.

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And now we want to say that – we want to copy this bottom part as well

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– we'll say that if the user's 'id' matches, in that case we will respond

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with the 'user.entries' and this 'entries' we want to actually increase.

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So we'll say that 'user.entries++' – remember thats the short form of me doing plus one and reassigning

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it.

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So we'll just do '++' and now the entries of the user should increase and then we'll respond with

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that. If that doesn't work, if the user wasn't found

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– in that case we'll just keep it the way it is: user was 'not found'.

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Let's say that and go back to Postman. We'll say '/image'.

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And within this image we will have a POST request, which means a body and we can just pass the user's

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"id".

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In our case we'll say "Id": "123", which is Johns 'id'.

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And we'll click Send.

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I get "1" if I click again I get "2", "3", "4", "5" and if I go back to the 'root' which

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returns our users and change that to GET I get John with five entries and Sally with zero entries.

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Let's make sure it works for Sally as well.

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If I do "124" I get now entries of "1" and going back to the GET users I get John with five entries

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and Sally with one entry. Amazing!

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We got ourselves a nice API server.

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It can definitely improve.

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There is a few things that we obviously want to change such as 'signin' – to not just have it for John.

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We have a few repetition of code that perhaps we can extract this out into a function.

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But I wanted us to have something working something that we can use so that we can connect it immediately

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with our front-end.

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We can finally delete our commented-out section where we planned what our API is going to look like.

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Good job getting this far.

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I'll see in the next video. Bye-bye