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  • (bell rings)

  • - Alright I'm back again, this is another video,

  • I'm just continuing making this Mastodon Bot.

  • (claps hands) And I got some good tips,

  • first of all I did kind of like a goofy thing here.

  • This .ENV package,

  • it's I guess good practice

  • or convention to put it as the first thing.

  • And I can just call .ENV

  • .config, I don't need to save it.

  • The variable I can do this just in one line of code.

  • So let me clean that up, that's a little bit nicer now.

  • The other thing that I want to do, is...

  • (snaps fingers) I want to make this bot post

  • every so often.

  • And so a quick way that I could do that

  • is with the setInterval function.

  • You know what I should also do?

  • Look at this, let me show you something.

  • So one thing that I often like to do,

  • so if I run this right now,

  • actually I just ran it, you can see this is

  • the response that I get after I post to Mastodon.

  • So I get each 'toot' as an id, and as a timestamp,

  • and as metadata about whether it's a reply to something,

  • that has it's content, you can see

  • it's formatted with HTML.

  • So what I actually would like to do

  • is not just console log all this JSON data

  • to the console,

  • I would like to just pick and choose

  • a few things to console log out as

  • kind of debugging information.

  • And also, something that I often like to do,

  • just to kind of help me with this kind of stuff

  • is use the built in node file system package.

  • So I'm going to require file system,

  • this is not a package I usually install,

  • it just comes with node,

  • just whatever version of node you're using.

  • And I'm actually going to say right here,

  • I'm going to say file system

  • .writeFileSync,

  • which is synchronous file writing.

  • And then I'm going to write this data,

  • actually the path is first.

  • And then the thing that I want to write,

  • which is probably JSON.stringify.

  • I want to stringify the data,

  • and I want it to have two space tabs.

  • And then I need to write this file out,

  • so I could just say data.JSON,

  • and then if I run this again

  • we should see now all of a sudden I have a new JSON

  • file that's appeared

  • in my directory here.

  • And I can look at it, and now if I want to

  • figure out what's the data that I got in the back,

  • I have this as a reference.

  • So I can now...

  • And I can timestamp the name of the file

  • and all sorts of things like that,

  • but I can now go and I can just comment this out.

  • And now I can be more thoughtful about this

  • and I can say console.log success...

  • Id.

  • And then I can put, sorry I need to go back here,

  • and I could say it's data.id created at.

  • So I would go back here and I would say

  • data.id ...

  • Plus ...

  • Data.created.

  • You know what?

  • Actually this is a good one, I really should just

  • do a separate video on this entirely

  • because it's such a wonderful feature of JavaScript now,

  • but you know how I'm always doing this console logging,

  • this text, and then some variable stuff

  • and I'm joining with a plus and concatenation.

  • You can use something called 'template literals',

  • which is a way of embedding expressions

  • inside of a string.

  • And the way to do that

  • is instead of quotes, with back ticks.

  • So if I put a back tick with the start and the beginning,

  • you no longer need this plus.

  • I'm just going to get rid of all this nonsense.

  • I just going to do id...

  • And timestamp...

  • Colon, and so now this is a string

  • and it has basically,

  • I want id, this is what I want to literally see,

  • and then what I want to see is the value of this.

  • And the way that I do that is with ${

  • } so now anything inside of here is an expression.

  • So I could write 4 + 7 and it would

  • put 11 in the string.

  • And then I could say timestampy,

  • I could make this like this.

  • And now we could run this again one more time,

  • node bot.js, and we could see this is what I get now.

  • Id and timestamp.

  • So this is what I'm going to see,

  • and maybe it would be useful for me to

  • also put the content there,

  • who knows what I want to log in console.log.

  • But I want to be more thoughtful about that,

  • not just spit out massive amounts of JSON data.

  • Okay. (claps hands)

  • Let's get to the good part.

  • Now.

  • What I want to do is, my first example of a bot,

  • is I want to make a random number bot.

  • So I'm going to say,

  • I'm going to use template literals again.

  • I'm going to say, "The meaning of life is..."

  • and then I'm going to use an expression

  • and I'm going to say Math.floor.

  • You know, let me put this in a separate variable.

  • Const num = Math.floor

  • math.random

  • times 100, see if we get 42.

  • And then I'm going to just put that here.

  • And now this.

  • My bot should now post: "The meaning of life is..."

  • this random number.

  • So Math.random gives me a random number,

  • a floating point number between 0 and 1,

  • I multiply that by 100 so I get a number

  • between 0 and 100, and technically the

  • highest number is 99.9999999.

  • And then Math.floor takes off the decimal point,

  • so I now have a random number between 0 and 99.

  • I could add 1 if I want between 1 and 100,

  • whatever, that's not the point.

  • The point is now...

  • And you know what, I really would like to see

  • from the console

  • what it posted, so I am also just going to do this.

  • Console log data., what was it?

  • Now I can go back to my data.JSON.

  • And it's going to be...

  • Where is the content?

  • Content, just data.content.

  • So I'm going to say data.content.

  • We're getting somewhere.

  • So let's run this one more time.

  • Success, the meaning of life is 95.

  • Okay, did we get it?

  • We can go here, we can double check.

  • Somehow it went away from there.

  • the meaning of like is 95, great.

  • Okay, now two more things I want to do,

  • make this bot exciting.

  • I am now going to use setInterval.

  • So the idea here is this is all of my code

  • to post to Mastodon.

  • And again, if this is new to you,

  • if you've just been watching my p5-js videos,

  • this weird syntax, this arrow syntax,

  • is part of EF6 JavaScript,

  • might be unfamiliar to you.

  • I will put a link to a video where I describe

  • what arrow syntax is

  • in this video's description.

  • Okay, so now what I want to do is all this stuff here

  • is basically just a function called 'toot'.

  • (laughs) Alright.

  • Because what I want to do is this function

  • will pick a random number, create the status,

  • and post it.

  • What I want to do is I want to say now setInterval,

  • and I want to do this toot every 5000 milliseconds,

  • which would be every five seconds.

  • Now this is a bit extreme,

  • this is not really appropriate bot etiquette,

  • to have a bot that posts every five seconds.

  • So probably a much more thoughtful way of doing this

  • if you're going to have a bot that posts in an

  • automated way, maybe it's a word of the day,

  • or a haiku of the day, maybe it's just once a day,

  • once an hour.

  • I'm going to run this every five seconds,

  • which is reasonable just for testing.

  • Something interesting about setInterval,

  • is what if I make this every 50 seconds.

  • If I run this right now, I got to wait 50 seconds

  • for it to do it the first time,

  • and that's not really such a great thing.

  • So I am going to actually also just call it once first,

  • and then do it every five seconds.

  • Okay, here we go.

  • We've got meaning of life is-

  • whoa it really picked 99?

  • That is awesome. (bell rings)

  • And it's 48, ooh we're getting close to 42,

  • we can see it's doing this every five seconds.

  • I'm going to quit out of it.

  • And I'm going to go back to here,

  • we can see- there it is, these are my posts

  • that I did.

  • You can see ten seconds ago, ten seconds ago, now.

  • I mean this is really five seconds ago.

  • Alright, so here's the thing.

  • I want to show you,

  • remember how I made this...

  • These parameters, all I'm doing is saying

  • this is the status that I want to post automatically

  • from my node program.

  • Well one of the things that I can actually do

  • is I can go back to the documentation,

  • there are all these other things.

  • So media id's is something I really want to show you

  • in a future video.

  • It's a way I can include an image

  • or other media with the post.

  • But one thing that I could do that's kind of fun

  • is this spoiler text thing.

  • So what spoiler text does is allows me to have

  • sort of two aspects

  • to the post.

  • The meaning of life is...

  • And then the status

  • can just be num.

  • So I'm going to break this up into two parts,

  • and I need a comma here.

  • And I'm just going to show you what this looks like.

  • So I'm using these parameters, different properties

  • of the JavaScript object, that's going to

  • go here into my post call.

  • And I'm going to now run this one more time,

  • and I'm going to go back to my bot,

  • and I'm going to look and you can see, look at this.

  • The meaning of life, but I now have this nice

  • 'show more' button.

  • So spoiler alert, if you click on this,

  • you'll see that its 52,

  • or that it's 23, and again I'm doing this too often,

  • so I'm going to absolutely quit this.

  • And then if I wanted to do-

  • Now if I want to have my bot post once a day

  • every 24 hours, I could just go right back to my code,

  • and I could say set interval should be

  • 24 hours.

  • There's 60 minutes an hour, 60 seconds an hour, and

  • 1000 milliseconds in a second.

  • So now, here we go, we now have a bot,

  • a Mastodon bot.

  • It will post a numeric meaning of life

  • once a day.

  • So in theory, if I just left this running here

  • and never closed my laptop,

  • or never did anything, this would just run

  • forever and once a day post.

  • The truth of the matter is you're going to have to

  • think about well, once you've created your bot

  • where is that bot going to live?

  • I mean, you could have it live on your laptop

  • or computer and it's always plugged in