freesewing/packages/plugin-measurements/src/index.js

import { version, name } from '../package.json'

export default {
  name: name,
  version: version,
  hooks: {
    preDraft: function ({ settings }) {
      if (
        typeof settings.measurements.seatBack !== 'undefined' &&
        typeof settings.measurements.seat !== 'undefined'
      ) {
        settings.measurements.seatFront =
          settings.measurements.seat - settings.measurements.seatBack
        settings.measurements.seatBackArc = settings.measurements.seatBack / 2
        settings.measurements.seatFrontArc = settings.measurements.seatFront / 2
      }
      if (
        typeof settings.measurements.waist !== 'undefined' &&
        typeof settings.measurements.waistBack !== 'undefined'
      ) {
        settings.measurements.waistBackArc = settings.measurements.waistBack / 2
        settings.measurements.waistFrontArc =
          (settings.measurements.waist - settings.measurements.waistBack) / 2
      }
      if (
        typeof settings.measurements.crossSeam !== 'undefined' &&
        typeof settings.measurements.crossSeamFront !== 'undefined'
      ) {
        settings.measurements.crossSeamBack =
          settings.measurements.crossSeam - settings.measurements.crossSeamFront
      }
    }
  }
}