Day.js is a powerful package that parses, validates, manipulates, and displays dates and times in JavaScript. It allows you to quickly and easily format dates in any way you want or parse strings back into JavaScript Date objects. There are many plugins for it that allow you to work with durations and more. So far, we learned how to create a new Date instance based on the current time, and how to create one based on a timestamp. In total, there are four formats by which you can create a new Date in JavaScript. In addition to the current time default and timestamp, you can also use a date string, or specify particular dates and times.
Use npm run build and npm start to get the bot started. The bot should respond with an embed and delete your message. String refers to the JavaScript primitive type, where string is the TypeScript type definition.Next you need to create the model. In mongoose, the model object serves to create, read, and update your documents in the MongoDB database. Add export default model(); at the bottom of your file. Back in your connectDatabase.ts file, within the connect function use process.env.MONGO_URI as string to coerce the type into string.
The error should go away, and you can now run npm run build and npm start. Assuming you added your new bot to a server, if you run npm run build and npm start you should see your bot come online in the server. However, the bot will not respond to anything yet, because we have not started listening to events. If you would like to test your settings, create a src directory and place an index.ts file inside.
Write some code (such as a console.log statement) and run npm run build in your terminal. You should see a prod directory get created, with an index.js containing your compiled code. The APOC date functions allow users to take these Long or String values and manipulate them for different types of format requirements. In this tutorial, we learned how to create an instance of the Date object, and use its built-in methods to access and modify components of a specific date.
For a more in-depth view of dates and times in JavaScript, you can read the Date reference on the Mozilla Developer Network. This loop iterates through the list of commands, and if the message content starts with the prefix and command name, the bot will call the command's run method. If you try npm run build again, you will see the same error message as before. This is because while we know the environment variable exists, TypeScript still cannot infer it. The validation function is set up to exit the process if the environment variable is missing, so we are going to tell TypeScript that it is definitely a string. Run the command npm init to set up your package.json file.
For this tutorial, the default values are sufficient, but feel free to edit them as you wish. Luxonis a date-time manipulation library created by one of the Moment.js developers to suit modern application requirements. Similar to Date-fns, Luxon offers data formatting and parsing functions. If you don't already have nodeJS installed, you'll need it to use Whencord.
I originally wrote Whencord using a similar PHP package but the relative time and localisation was not a close enough match. I could then have written the whole thing in NodeJS of course, but then we'd miss out on PHP's wonderful string to time conversion. If, however, you still need to convert timestamp formats, this procedure provides that functionality. The get methods discussed above retrieve the date components based on the user's local timezone settings.
Below is a table of the UTC methods for the JavaScript Date object. Epoch time was chosen as a standard for computers to measure time by in earlier days of programming, and it is the method that JavaScript uses. It is important to understand the concept of both the timestamp and the date string, as both may be used depending on the settings and purpose of an application. This code takes the current time and adds ten minutes.
The values are converted into milliseconds, so they can be added together and turned into a new deadline. Each element in the schedule array represents a start date and an end date. As noted above, it is possible to include times and time zones, but I used plain dates here to keep the code readable.
One last time, create a help file in your commands directory. Import your CommandInt interface and set up your command as help. Set the name to "help", and the description to something like "Returns information on the bot's available commands.".
Edit command call, which is not needed for this command so you do not need to assign it to a value. The targetId element would be the id of the message to edit. The channel property you extracted from the message value earlier represents the Discord channel in which the message was sent.
This object has a .send() method, which you can use to have the bot send a message back to that channel. Use await channel.send to send your new embed to that channel. Because you are using TypeScript, you need to create a type definition for your database objects. Create another interface, like you did for your commands, named CamperInt.
The purpose of this file is to create an array of your bot's commands which you will iterate over in the message event listener. There are ways to automate this, but they tend to be unnecessarily complex for smaller bots. Within your events folder, create an onMessage.ts file.
At the top, import the Message class from discord.js with import from "discord.js";. The process.env object will contain the environment variables for your Node.js runtime environment. With the dotenv package, this will also include any variables you set in your .env secrets file. If you are using a UNIX based environment , you can also add a prebuild script to your package.json. The prebuild script will automatically run before the build script when you use npm run build. I set mine to clean up the existing prod directory with rm -r ./prod.
@types/node – TypeScript relies on type definitions to help understand the code you write. This package defines the types for the Node.js runtime environment, such as the process.env object. This function can add or subtract time unit values to or from dates in the epoch format.
Date and time are a regular part of our everyday lives and therefore feature prominently in computer programming. In JavaScript, you might have to create a website with a calendar, a train schedule, or an interface to set up appointments. Additionally, you might need to use JavaScript to generate a report at a certain time every day, or filter through currently open restaurants and establishments. JavaScript dates and times are taken from the user's computer. That means the user can affect a JavaScript clock by changing the time on their machine.
But in the case of something super sensitive, it will be necessary to get the time from the server. That can be done with a bit of PHP or Ajax, both of which are beyond the scope of this tutorial. Another aspect of fluent API methods is that they return the same object allowing you to chain additional methods for succinct and easy to read code. Now that you have asserted that the message exists, you can start working with the properties. Because your bot sends the message as an embed, the content property you are used to working with will be empty.
Instead, you can find the embed within the embeds property. Now you will construct the message the bot should send. Message embeds are special message formats that are available to Discord bots, which offer additional formatting options and styling. This function will be synchronous and does not need the async keyword. Within that function, add conditions to check for your two environment variables. ByJuan Cruz MartinezIn theory, handling dates as a developer is as simple as creating, storing, and, if necessary, manipulating dates.
But as a Javascript developer, you would know this theory doesn't hold long after you start working with dates for real. On top of different date-time formats, you have to consider timezone and locale differences. The unix time stamp is a way to track time as a running total of seconds. This count starts at the Unix Epoch on January 1st, 1970 at UTC. Therefore, the unix time stamp is merely the number of seconds between a particular date and the Unix Epoch.
It should also be pointed out that this point in time technically does not change no matter where you are located on the globe. This is very useful to computer systems for tracking and sorting dated information in dynamic and distributed applications both online and client side. We recommend you set pino-pretty up in a package script in your package.json file, rather than typing the pipeline out every time. Please read our guide section on package scripts, if you are not sure what we're talking about here. Ms is another tool for working with times in JavaScript. It allows you to convert times in milliseconds into human-readable formats and vice versa.
This function converts dates in epoch format to date strings in ISO8601 standard format. This function parses a date string in a specified format and converts it to a Neo4j-supported temporal type with date, time, and timezone. This function converts date strings in an ISO8601 standard format to dates in epoch format. This function converts dates in epoch format to date strings with a specified format. Once we have a date, we can access all the components of the date with various built-in methods.
The methods will return each part of the date relative to the local timezone. Each of these methods starts with get, and will return the relative number. Below is a detailed table of the get methods of the Date object. The ntplib python module has functions to convert from datetime timestamp to NTP timestamp and back. For more information about the values this parameter can have, seeSQL Format Models.
In the clock, we've used setInterval to update the display every second. This is fine most of the time, except in the beginning when there will be a one-second delay. To remove this delay, we'll have to update the clock once before the interval starts. These are the id of the element that contains our clock, and the countdown's end time. Inside the function, we'll declare a clock variable and use it to store a reference to our clock container div.
First, we're creating a variable total, to hold the remaining time until the deadline. The Date.parse() function converts a time string into a value in milliseconds. This allows us to subtract two times from each other and get the amount of time in between.
The following JavaScript code will create an object of Date and then get current date/time in UTC in human readable for. So now you know how to format dates using Moment and Node. You understand how to work with the current date, as well as how to use standard and non-standard date strings. You also know how to display a date in whatever format you like by supplying a format token template. Because you did not destructure the channel property out of the message object, you will need to use message.channel.send; directly.
You are then joining that array of strings with a new-line separator, which will create a vertical list of commands in a single string . Instead of taking a text input from the user, you are using a fixed description value to indicate this is a view embed instead of a 100 embed. Since you use the timestamp in the description, you do not need to add a footer. Now, if the user doesn't have a data record yet, they haven't started the challenge with the bot. You should send a message to let them know how to do this. Embed fields are additional title-description pairs that can be nested within the embed, and optionally inlined.
These can be created with the .addField() method, which takes up to three arguments. The first argument is the field title, the second argument is the field description, and the third argument is an optional Boolean to set the field as inline. There's one more step before you are ready to start writing commands. This bot will track your community members' 100 Days of Code progress. And you need to store that progress in the database.
Remember that you declared the run property to be an async function that took the message as an argument. Then, to save on compute time, the loop breaks when it finds a matching command. For your changes to take effect, use npm run build again to compile the new code. Now if you try npm run start, you should see "Connected to Discord!" print in your terminal. Within this function you are going to instantiate your Discord bot.
At the top of the file, import the Client class with import from "discord.js;". The Client class represents your Discord bot's session. The getTime() method returns the number of milliseconds elapsed since the Unix epoch.
As we can see, comparing dates just boils down to converting the provided strings into Date objects and comparing them with an appropriate comparison operator. Dates are a really common data type developers work with. Moment.js used to be the king of date manipulation libraries among Javascript developers. However, its developers recently announcedthat it's focusing on maintaining the current codebase instead of adding new features. They recommend looking for an alternative solution for those who are working on new projects. In this method of creating a date, we can't pass an argument to indicate its time zone.
