front-end

Front End Engineering Test

At Orah, most of our services are written in Javascript/Typescript. New features on the web are written in React with Typescript. This project will give you an idea of the codebase you will be working with as a front end engineer at Orah.

Instructions

This test has all the necessary components for a functional app with some missing functionality which you will need to implement, however please feel free to add any files/components you deem useful.

Please fork this repo under your own github account and create a branch named solution once you are ready to start and commit as you would normally do under your own solution branch as we would love to see how you progress.

Note: Do not create Pull Request.

Share the link of the forked repository once you are finished with your solution.

Technology

This project is written in React with Typescript. However, it is not required for you to complete this test in Typescript. If this is your first time using Typescript, you can quickly (within 5 minutes) get started after reading this guide.

We use styled-component for styling in this project. Feel free to use css or sass if you are more comfortable with them.

Tasks

1. Implement search and sort of students

First implement an efficient way to sort and search the list of students. Please update "First Name" section of the toolbar with a sort toggle (switch between ascending or descending order) as well as a way to switch between sort by first name or last name. Then replace the "Search" with an input to allow users to search by name.

2. Displaying a roll summary

Clicking on "Start Roll" will enter the roll mode which would display a roll state icon for each student in the list. You can click on the icon to switch between "Present", "Late", "Absent" state. In this mode, you will also see a dark blue overlay shown at the bottom of the page which displays the summary of different roll states and the number of students. They all show 0 at the moment as it hasn't been implemented. Please update it to show the correct number.

3. Filter students based on roll state

When clicking on each roll state icon, it should filter the list of students to only the ones with the matching roll state. Please implement a way to filter students based on roll state. You may update how we store the list of students if you haven't done so in previous steps (you can continue with using states in React, or use Context, or use whichever state management library you are most familiar with).

4. (BONUS) Save the current roll and display it in activity page

Finally once we are done with this roll, we can click on the "Complete" button to save a snapshot of the roll (which student is in what roll state). Please call the save-roll route with necessary params in order to save this roll.

Once the roll has been saved, you can call the get-activities route to get list of rolls we have completed. Please implement the UI to display a list of completed rolls in the activity page.

Most of the successful candidates have shown strong styling skills and a good sense of UX. Therefore it is recommended that you spend an extra effort to make it looks pretty ✨.

How to run

You will need to have Node 10.16.0 or later on your local development machine. You can use nvm (macOS/Linux) or nvm-windows to switch Node versions between different projects.

First install all dependencies

cd front-end && npm i

To start the local server

npm start

Open app in browser

Once the app is compiled and bundled successfully you should see this screen in your browser. This would be your starting point of the project.

Project structure

Open the project in VSCode as a workspace and install the recommented plugins:

• vscode-eslint for linting
• prettier-vscode for formatting
• vscode-styled-components for auto-completing and syntax highlighting of styled-components code

You should see the project is structured as follows:

.
└── front-end
    └── src
        ├── api
        ├── assets
        │   └── images
        ├── shared
        │   ├── components
        │   ├── helpers
        │   ├── hooks
        │   ├── interfaces
        │   ├── models
        │   └── styles
        └── staff-app

src/api

This is the place for all "backend routes". There is no actual backend with database connection for this project. The routes in here use localStorage to store data, and will return a Promise with data that will be resolved at random timeout between 0.5 to 2 seconds. Some of the routes would also return unsuccessful responses to simulate the real world scenario.

src/assets

A place for all kinds of assets used in code such as images.

src/shared

This folder contains some of the shared components/hooks/styles across multiple apps.

For example there is a useApi custom hook under src/shared/hooks to simplify the communication with the backend. You need to specify the url (and params for POST) in the useApi params. It will return you the nessary function and state you need to display the data returned from the backend as well as handling of loading and error state.

const [getStudents, data, loadState] = useApi<{ students: Person[] }>({ url: "route" })

src/staff-app

This is the React app for staff users.