11-22-16-SearchSubjectsForBooks

11-22-16-searchSubjectsForBooks.js

const unwindSubjects = subjects => {
    let result = [];
    subjects.concat().sort(subjectSortCompare).forEach(s => {
        result.push(s);
        result.push(...unwindSubjects(s.children));
    });
    return result;
};

const stackedSubjectsSelector = createSelector([state => state.app.subjectHash],
    subjectHash => {
        let mainSubjectsCollection = stackAndGetTopLevelSubjects(subjectHash),
            subjectsUnwound = unwindSubjects(mainSubjectsCollection);

        return {
            subjects: mainSubjectsCollection,
            allSubjectsSorted: allSubjectsSorted(subjectHash),
            subjectsUnwound: subjectsUnwound
        };
    }
);

const searchSubjectsSelector = createSelector([
    stackedSubjectsSelector,
    state => state.booksModule.subjects.subjectSearch
], (stackedSubjects, subjectSearch) => ({ ...stackedSubjects, subjectsSearched: filterSubjects(stackedSubjects.subjectsUnwound, subjectSearch) }));