MVJ Public-UI

This is the public user interface that allows citizens and organizations in Helsinki to browse and attend into ongoing plot search competitions. This is a part of MVJ ("Maanvuokrausjärjestelmä") which also contains UI for city officials to handle ground rental related matters. This public UI and the closed-from-public UI for city officials share the same MVJ-backend.

Originally based on React Boilerplate Later the now deprecated Create React App is replaced with Vite

Development Environment

To build up a development environment please follow these steps:

1. Clone this repository from git: git pull git@github.com:City-of-Helsinki/mvj-ui-public.git
2. Start the docker container: docker-compose up

Usage w/o docker

1. Check requirements:
   1. Project runs on node 18
   2. Yarn needs to be installed
2. On project root run yarn to install packages
3. Run yarn start to run dev server

Code style

Formatting wise, consistent code style is primarily enforced with Prettier automatically when files are committed to the repository. Some code style guidelines should be followed manually by the developer as listed below.

Functional vs class-based components

Prefer functional components, hooks, and other modern React concepts over the more traditional class and HOC based approaches.

Style definitions and class names

Prefer specifying the styles for components in Sass stylesheets. Inline CSS rules should primarily be used when they need to be dynamic (for example, a background image based on the current application state).

All class names we are in control of should follow the Block-Element-Modifier naming system. In the context of a React application, each component represents one block, so the outermost element rendered by that component should have a class named after the component itself if there are any styles to attach to it or its children. Any inner elements rendered by that same component will then follow the BEM style normally, all using the component name as the block base. Use PascalCase for the block part of the name and kebab-case for the element and modifier parts.

For example, note how the class names are laid out in the component definition below:

type Props = {
  disabled?: boolean;
  wrapText?: boolean;
  text?: string;
};

const CustomButton = ({
  disabled = false,
  wrapText = false,
  text = '',
}: Props): JSX.Element => {
  return (
    <button
      className={classNames('CustomButton', {
        'CustomButton--disabled': disabled,
        'CustomButton--wrap-text': wrapText,
      })}
    >
      <span className="CustomButton__label">{text}</span>
    </button>
  );
};

"Magic" class names that are first defined somewhere and then sprinkled over different components when needed should not be used; if parts of different components need to be styled the same way, either make a new shared component that will provide that style or use Sass mixins, whichever is more appropriate for that situation.

Localisation

The application is localised using the react-i18next library. All translatable messages should be defined through either its translation function or the Trans component, whichever is more appropriate for the situation, and given a meaningful translation key as well as a default message in English. The translation keys can then be automatically collected into the translation files located in src/i18n by running the command

yarn run i18n

After this, all new messages as well as any old messages whose default translation changed will now have an empty string in each of the respective non-English locale files, which can then be translated. The English file will also be populated with the default values from the source code files.