mirror of
https://github.com/vector-im/element-ios.git
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166 lines
5.6 KiB
Swift
166 lines
5.6 KiB
Swift
//
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// Copyright 2021 New Vector Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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import Foundation
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import Combine
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protocol MatrixItemChooserDataSource {
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func sections(with session: MXSession, completion: @escaping (Result<[MatrixListItemSectionData], Error>) -> Void)
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var preselectedItemIds: Set<String>? { get }
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}
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protocol MatrixItemChooserProcessorProtocol {
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var loadingText: String? { get }
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var dataSource: MatrixItemChooserDataSource { get }
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func computeSelection(withIds itemsIds:[String], completion: @escaping (Result<Void, Error>) -> Void)
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func isItemIncluded(_ item: (MatrixListItemData)) -> Bool
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}
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class MatrixItemChooserService: MatrixItemChooserServiceProtocol {
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// MARK: - Properties
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// MARK: Private
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private let processingQueue = DispatchQueue(label: "io.element.MatrixItemChooserService.processingQueue")
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private let completionQueue = DispatchQueue.main
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private let session: MXSession
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private var sections: [MatrixListItemSectionData] = []
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private var filteredSections: [MatrixListItemSectionData] = [] {
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didSet {
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sectionsSubject.send(filteredSections)
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}
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}
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private var selectedItemIds: Set<String>
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private let itemsProcessor: MatrixItemChooserProcessorProtocol
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// MARK: Public
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private(set) var sectionsSubject: CurrentValueSubject<[MatrixListItemSectionData], Never>
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private(set) var selectedItemIdsSubject: CurrentValueSubject<Set<String>, Never>
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var searchText: String = "" {
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didSet {
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refresh()
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}
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}
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var loadingText: String? {
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itemsProcessor.loadingText
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}
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var itemCount: Int {
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var itemCount = 0
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for section in sections {
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itemCount += section.items.count
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}
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return itemCount
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}
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// MARK: - Setup
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init(session: MXSession, selectedItemIds: [String], itemsProcessor: MatrixItemChooserProcessorProtocol) {
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self.session = session
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self.sectionsSubject = CurrentValueSubject(self.sections)
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self.selectedItemIds = Set(selectedItemIds)
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self.selectedItemIdsSubject = CurrentValueSubject(self.selectedItemIds)
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self.itemsProcessor = itemsProcessor
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itemsProcessor.dataSource.sections(with: session) { [weak self] result in
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guard let self = self else { return }
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switch result {
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case .success(let sections):
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self.sections = sections
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self.refresh()
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if let preselectedItemIds = itemsProcessor.dataSource.preselectedItemIds {
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for itemId in preselectedItemIds {
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self.selectedItemIds.insert(itemId)
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}
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self.selectedItemIdsSubject.send(self.selectedItemIds)
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}
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case .failure(let error):
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break
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}
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}
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refresh()
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}
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// MARK: - Public
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func reverseSelectionForItem(withId itemId: String) {
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if selectedItemIds.contains(itemId) {
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selectedItemIds.remove(itemId)
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} else {
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selectedItemIds.insert(itemId)
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}
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selectedItemIdsSubject.send(selectedItemIds)
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}
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func processSelection(completion: @escaping (Result<Void, Error>) -> Void) {
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itemsProcessor.computeSelection(withIds: Array(selectedItemIds), completion: completion)
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}
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func refresh() {
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self.processingQueue.async { [weak self] in
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guard let self = self else { return }
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let filteredSections = self.filter(sections: self.sections)
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self.completionQueue.async {
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self.filteredSections = filteredSections
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}
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}
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}
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func selectAllItems() {
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var newSelection: Set<String> = Set()
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for section in sections {
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for item in section.items {
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newSelection.insert(item.id)
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}
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}
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self.selectedItemIds = newSelection
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selectedItemIdsSubject.send(selectedItemIds)
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}
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func deselectAllItems() {
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self.selectedItemIds = Set()
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selectedItemIdsSubject.send(selectedItemIds)
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}
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// MARK: - Private
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private func filter(sections: [MatrixListItemSectionData]) -> [MatrixListItemSectionData] {
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var newSections: [MatrixListItemSectionData] = []
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for section in sections {
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let items: [MatrixListItemData]
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if searchText.isEmpty {
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items = section.items.filter {
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itemsProcessor.isItemIncluded($0)
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}
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} else {
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let lowercasedSearchText = self.searchText.lowercased()
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items = section.items.filter {
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itemsProcessor.isItemIncluded($0) && ($0.id.lowercased().contains(lowercasedSearchText) || ($0.displayName ?? "").lowercased().contains(lowercasedSearchText))
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}
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}
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newSections.append(MatrixListItemSectionData(id: section.id, title: section.title, infoText: section.infoText, items: items))
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}
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return newSections
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}
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}
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