UHF-7475: Added template for calculator paragraph

[lonkaanna]

UHF-7475

We need a way to create calculators easily with these things in mind:

• Should be easy to update values like trigger points or prices of meals and such on a yearly base by instance admin
• Should be easy to create and validate algorithm of the calculator by a non-drupal javascript coder
  • Should be easy to run the calculator even without drupal on local machine
• Calculators should be language supported, but translation should stay near the code as they both change likely at the same time
• Should follow hds.hel.fi styles
• Should be lightweight
• Easy to add to pages as a paragraph in Drupal

What was done

• We created a setup page for updating settings of calculators by instance admin
  • The setup page contains 7 initial calculators, option to enable each (disabled by default) and settings textarea for each
• We added a paragraph type that updates its contents based on the enabled calculators
  • It contains normal component title and description and a dropdown with enabled calculators
  • If a calculator is disabled by admin after it's being used on a page, it will return to special "disabled" state and whole paragraph will not render, but its contents will stay for the editor to see
• We created a base js library for handling most of the repeating form building and validating tasks helfi_calculator.js.
• We created 3 javascript files for 3 calculators as a proof of concept with the current "old" calculator design
  • One of them contains the actual algorithm in use today
  • Two others contain basic form inputs, and basic validation for those, but no algorithm to calculate anything as the old algorithms were horrible and due for update.

How to install

• Make sure your instance is up and running on latest dev branch.
  • git pull origin dev
  • make fresh
• Update the HDBT theme
  • composer require drupal/hdbt:dev-UHF-7029-helfi-calculator
• Enable calculator module: drush en helfi_calculator
• Add calculator paragraph to upper and lower content area in /admin/structure/types/manage/page/fields
• Enable daycare calculator from /admin/tools/calculator-settings
• run in hdbt: nvm use; npm i; npm run build
• Run make drush-cr

How to test

• Open the calculator settings page for example: https://helfi-etusivu.docker.so/fi/admin/tools/calculator-settings
• Enable these calculators (or all of them, the others will not render as of now)
  • House cleaning service voucher
  • Home care service voucher
  • Home care client payment
• Add this JSON to House cleaning service voucher textarea:

    {
      "household_size_1": {
        "first_level": {
          "value": 24,
          "max_allowed_income": 1138
        },
        "second_level": {
          "value": 21,
          "max_allowed_income": 1422
        }
      },
      "household_size_2": {
        "first_level": {
          "value": 24,
          "max_allowed_income": 1575
        },
        "second_level": {
          "value": 21,
          "max_allowed_income": 2107
        }
      }
    }

• Create a new page, add the three calculators in separate paragraphs on it
• Check that calculators work, the cleaning service voucher calculates and concept is solid
• Check that code follows our standards

Designers review

• This PR does not need designers review as it's a poc of feasibility, not style (it has been shown to designers tho)

Other PRs

• UHF-7029: Created helfi calculator module and added paragraph to stan… drupal-helfi-platform-config#390