transitionSeoCollection function

SeoCollectionState transitionSeoCollection(SeoCollectionState state, SeoCollectionAction action, { required List<SeoCollectionRecord> records, required int categoryCount, required int pageSize, })

Applies one closed action and returns canonical collection state.

Implementation

SeoCollectionState transitionSeoCollection(
  SeoCollectionState state,
  SeoCollectionAction action, {
  required List<SeoCollectionRecord> records,
  required int categoryCount,
  required int pageSize,
}) {
  final candidate = switch (action) {
    SeoCollectionSetQuery(:final query) => SeoCollectionState(
        query: query,
        categoryIndex: state.categoryIndex,
        sort: state.sort,
      ),
    SeoCollectionSelectCategory(:final index) => SeoCollectionState(
        query: state.query,
        categoryIndex: index,
        sort: state.sort,
      ),
    SeoCollectionSetSort(:final sort) => SeoCollectionState(
        query: state.query,
        categoryIndex: state.categoryIndex,
        sort: sort,
      ),
    SeoCollectionSetPage(:final page) => SeoCollectionState(
        query: state.query,
        categoryIndex: state.categoryIndex,
        sort: state.sort,
        page: page,
      ),
    SeoCollectionNextPage() => SeoCollectionState(
        query: state.query,
        categoryIndex: state.categoryIndex,
        sort: state.sort,
        page: state.page + 1,
      ),
    SeoCollectionPreviousPage() => SeoCollectionState(
        query: state.query,
        categoryIndex: state.categoryIndex,
        sort: state.sort,
        page: state.page - 1,
      ),
  };
  return selectSeoCollection(
    records: records,
    categoryCount: categoryCount,
    pageSize: pageSize,
    state: candidate,
  ).state;
}