Mirage queryParams support (JSON:API filter, page and sort)

mirage.config.js

function applyQueryParams(collection, queryParams) {
  let qp = {
    filter: {},
    page: {},
    sort: ''
  };

  Object.keys(queryParams)
    .reduce((data, key) => {
      let matches = key.match(/(.*)\[(.*)\]$/);

      if (matches) {
        data[matches[1]][matches[2]] = queryParams[key];
      } else {
        data[key] = queryParams[key];
      }

      return data;
    }, qp);

  if (qp.filter) {
    collection = collection.where(qp.filter);
  } else {
    collection = collection.all();
  }

  // TODO: Add sort

  if (qp.page) {
    let start = (qp.page.number * qp.page.size) - qp.page.size;
    collection = collection.slice(start, qp.page.size);
  }

  return collection;
}

export function testConfig() {
  [
    'users'
  ].forEach((resource) => {
    this.get(`/${resource}`, (schema, { queryParams }) => {
      return applyQueryParams(schema[resource.camelize()], queryParams);
    });

    this.get(`/${resource}/:id`, (schema, request) => {
      return schema[resource.camelize()].find(request.params.id);
    });
  });
}