strapi/packages/strapi-plugin-content-manager/admin/src/containers/EditViewDataManagerProvider/utils/createDefaultForm.js

import { get } from 'lodash';

const createDefaultForm = (attributes, allComponentsSchema) => {
  return Object.keys(attributes).reduce((acc, current) => {
    const attribute = get(attributes, [current], {});
    const {
      default: defaultValue,
      component,
      type,
      required,
      min,
      repeatable,
    } = attribute;

    if (type === 'json') {
      acc[current] = null;
    }

    if (type === 'json' && required === true) {
      acc[current] = {};
    }

    if (defaultValue !== undefined) {
      acc[current] = defaultValue;
    }

    if (type === 'component') {
      const currentComponentSchema = get(
        allComponentsSchema,
        [component, 'schema', 'attributes'],
        {}
      );
      const currentComponentDefaultForm = createDefaultForm(
        currentComponentSchema,
        allComponentsSchema
      );

      if (required === true) {
        acc[current] = repeatable === true ? [] : {};
      }

      if (min && repeatable === true && required) {
        acc[current] = [];

        for (let i = 0; i < min; i++) {
          acc[current].push(currentComponentDefaultForm);
        }
      }
    }

    return acc;
  }, {});
};

export default createDefaultForm;