Component Connector

CategoriesConnector.swift

// Components/Categories/CategoriesConnector.swift

final class CategoriesConnector: Connector {

    private let disposer = Disposer()

    let repositories: RepositoryProviderProtocol


    required init(repositories: RepositoryProviderProtocol) {
        self.repositories = repositories
    }


    func connect(to component: CategoriesComponent) {
        component.props = mapToProps(state: .initial)
        core.observe(on: .main) { [weak self] (state) in
            guard let self = self else {
                return
            }
            component.props = self.mapToProps(state: state)
        }.dispose(on: disposer)
    }
  
    func mapToProps(state: AppFeature.State) -> CategoriesProps {
        return CategoriesProps(
            state: mapToPropsState(state: state),
            loadCategoriesList: CategoriesFeature.Commands.loadCategoriesList(repositories)
        )
    }

    private func mapToPropsState(state: AppFeature.State) -> CategoriesProps.State {
        let categoriesState = state.categoriesState
        let transactionState = state.transactionState

        guard !categoriesState.isLoading else {
            return .loading
        }

        var categories: [CategoriesProps.CategoryInfo] = []
        for id in categoriesState.sortOrder {
            if let category = categoriesState.categories[id] {
                categories.append(mapCategoryToProps(
                    category: category,
                    isSelected: transactionState.categoryID == category.id
                ))
            }
        }

        return .idle(categories: categories)
    }

    private func mapCategoryToProps(category: Category, isSelected: Bool) -> CategoriesProps.CategoryInfo {
        let command: PlainCommand?
        if !isSelected {
            command = PlainCommand { [unowned self] in
                TransactionFeature.Commands.selectCategory(self.repositories).execute(with: category)
            }
        } else {
            command = nil
        }

        return CategoriesProps.CategoryInfo(
            title: category.title,
            icon: category.icon.image,
            currentBalance: "0 BYN",
            selectCommand: command
        )
    }

}