export function updateExtents()

in src/components/datagraphic/extents.js [12:46]

• 23 lines of code
• 13 McCabe index (conditional complexity)

export function updateExtents(store, key, data, accessor = undefined) {
  if (!data) throw Error('data is required');
  let dArray = data;
  const isArrayOfObjects = typeof data[0] === 'object' && data[0] !== null;
  if (isArrayOfObjects) {
    if (!accessor) {
      throw Error('cannot pass in array of objects w/o an accessor');
    }
    dArray = data.map((di) => di[accessor]);
  }
  if (!('set' in store && 'subscribe' in store && 'update' in store)) {
    throw Error(
      'must pass in a svelte store w/ a subscribe, update, and set method'
    );
  }

  const [minValue, maxValue] = extent(dArray);

  const currentValues = get(store)[key];
  let currentMin;
  let currentMax;
  if (currentValues) {
    currentMin = currentValues.min;
    currentMax = currentValues.max;
  }

  if (!currentValues || (currentMin !== minValue && currentMax !== maxValue))
    store.update((storeValue) => {
      if (!(typeof storeValue === 'object' && storeValue !== null)) {
        throw Error('store value must be an object');
      }
      storeValue[key] = { max: maxValue, min: minValue }; // eslint-disable-line
      return storeValue;
    });
}