249 lines
8.8 KiB
Swift
249 lines
8.8 KiB
Swift
//
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// OfflineCollectionViewModels.swift
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// suixinkan
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//
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import Foundation
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/// 收款首页线下收款区域的 ViewModel。
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final class OfflineCollectionHomeViewModel {
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private(set) var todaySummary: OfflineDailySummary
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private(set) var overdueSummaries: [OfflineDailySummary] = []
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let context: OfflineCollectionContext
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let service: OfflineCollectionMockService
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var onStateChange: (() -> Void)?
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/// 使用当前账号上下文创建首页 ViewModel。
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init(
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context: OfflineCollectionContext = .current(),
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service: OfflineCollectionMockService = .shared
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) {
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self.context = context
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self.service = service
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todaySummary = OfflineDailySummary.make(businessDate: service.todayBusinessDate, records: [])
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load()
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}
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/// 当前今日营业日。
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var todayBusinessDate: String { service.todayBusinessDate }
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/// 最早一个需要处理的逾期营业日。
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var earliestOverdueBusinessDate: String? { overdueSummaries.first?.businessDate }
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/// 历史逾期记录的合计笔数。
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var overdueRecordCount: Int { overdueSummaries.reduce(0) { $0 + $1.pendingCount } }
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/// 历史逾期记录的合计待补缴金额。
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var overdueAmountFen: Int { overdueSummaries.reduce(0) { $0 + $1.pendingAmountFen } }
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/// 从本地 Mock 服务重新读取今日和逾期汇总。
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func load() {
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todaySummary = service.getDailySummary(date: todayBusinessDate, context: context)
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overdueSummaries = service.getOverdueSummaries(context: context)
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onStateChange?()
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}
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}
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/// 线下收款登记页 ViewModel，管理表单校验、提交防重和成功反馈。
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final class OfflineCollectionRegistrationViewModel {
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private(set) var amountText = ""
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private(set) var paymentMethod: OfflineCollectionPaymentMethod? = .wechat
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private(set) var isSubmitting = false
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private(set) var receipt: OfflineCollectionRegistrationReceipt?
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let context: OfflineCollectionContext
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let service: OfflineCollectionMockService
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var onStateChange: (() -> Void)?
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var onShowMessage: ((String) -> Void)?
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var onRegistrationSuccess: ((OfflineCollectionRegistrationReceipt) -> Void)?
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/// 使用指定收款上下文和 Mock 服务创建登记 ViewModel。
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init(
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context: OfflineCollectionContext = .current(),
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service: OfflineCollectionMockService = .shared
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) {
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self.context = context
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self.service = service
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}
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/// 当前金额和收款方式是否允许提交。
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var canSubmit: Bool {
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!isSubmitting && OfflineCollectionMoney.parseFen(amountText) != nil && paymentMethod != nil
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}
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/// 更新金额输入，仅接受数字、单个小数点和最多两位小数。
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func updateAmount(_ value: String) {
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guard OfflineCollectionMoney.acceptsEditingText(value) else { return }
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amountText = value
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receipt = nil
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onStateChange?()
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}
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/// 选择线下收款方式。
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func selectPaymentMethod(_ method: OfflineCollectionPaymentMethod) {
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paymentMethod = method
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receipt = nil
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onStateChange?()
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}
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/// 提交一笔线下收款登记，提交中的重复调用会被忽略。
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func submit() async {
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guard !isSubmitting else { return }
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guard let amountFen = OfflineCollectionMoney.parseFen(amountText) else {
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onShowMessage?(OfflineCollectionError.invalidAmount.localizedDescription)
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return
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}
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guard let paymentMethod else {
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onShowMessage?("请选择收款方式")
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return
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}
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isSubmitting = true
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onStateChange?()
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defer {
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isSubmitting = false
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onStateChange?()
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}
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do {
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let result = try await service.createOfflineCollection(
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amountFen: amountFen,
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paymentMethod: paymentMethod,
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context: context
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)
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receipt = result
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onRegistrationSuccess?(result)
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} catch {
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onShowMessage?(error.localizedDescription)
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}
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}
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/// 登记成功后开始下一笔，清空金额并保留本次收款方式。
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func startAnotherRegistration() {
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amountText = ""
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receipt = nil
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onStateChange?()
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}
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}
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/// 日清页的补缴处理状态。
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enum OfflineSettlementPresentationState: Sendable, Equatable {
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case idle
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case processing
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case success(OfflineSettlementBatch)
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case failed(String)
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}
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/// 线下收款日清页 ViewModel，负责单营业日汇总、快照冻结和全额补缴。
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final class OfflineCollectionDailyViewModel {
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private(set) var businessDate: String
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private(set) var summary: OfflineDailySummary
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private(set) var records: [OfflineCollectionRecord] = []
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private(set) var batches: [OfflineSettlementBatch] = []
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private(set) var availableBusinessDates: [String] = []
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private(set) var settlementState: OfflineSettlementPresentationState = .idle
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private(set) var preparedRequest: OfflineSettlementRequest?
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let context: OfflineCollectionContext
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let service: OfflineCollectionMockService
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var onStateChange: (() -> Void)?
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/// 使用指定营业日、收款上下文和 Mock 服务创建日清 ViewModel。
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init(
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businessDate: String,
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context: OfflineCollectionContext = .current(),
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service: OfflineCollectionMockService = .shared
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) {
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self.businessDate = businessDate
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self.context = context
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self.service = service
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summary = OfflineDailySummary.make(businessDate: businessDate, records: [])
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load()
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}
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/// 当前查看的是否为今日营业日。
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var isToday: Bool { businessDate == service.todayBusinessDate }
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/// 当前是否可以发起补缴。
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var canSettle: Bool {
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summary.pendingAmountFen > 0 && summary.pendingCount > 0 && settlementState != .processing
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}
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/// 从本地 Mock 服务加载当前营业日的全部数据。
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func load() {
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records = service.getDailyRecords(date: businessDate, context: context)
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summary = service.getDailySummary(date: businessDate, context: context)
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batches = service.getSettlementBatches(date: businessDate, context: context)
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availableBusinessDates = service.getAvailableBusinessDates(context: context)
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onStateChange?()
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}
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/// 切换至已存在数据或今日的营业日。
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func selectBusinessDate(_ date: String) {
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guard availableBusinessDates.contains(date), settlementState != .processing else { return }
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businessDate = date
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preparedRequest = nil
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settlementState = .idle
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load()
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}
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/// 按页面当前待补缴记录冻结一份不可编辑的补缴快照。
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func prepareSettlement() throws -> OfflineSettlementRequest {
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guard canSettle else { throw OfflineCollectionError.noPendingRecords }
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let pendingRecords = records.filter { $0.status == .pending || $0.status == .overdue }
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let amountFen = pendingRecords.reduce(0) { $0 + $1.amountFen }
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guard pendingRecords.count == summary.pendingCount, amountFen == summary.pendingAmountFen else {
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throw OfflineCollectionError.summaryMismatch
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}
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let request = OfflineSettlementRequest(
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businessDate: businessDate,
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recordIds: pendingRecords.map(\.id),
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amountFen: amountFen,
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clientRequestId: "LOCAL-\(UUID().uuidString.uppercased())"
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)
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preparedRequest = request
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return request
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}
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/// 取消未提交的补缴确认快照。
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func cancelPreparedSettlement() {
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guard settlementState != .processing else { return }
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preparedRequest = nil
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}
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/// 提交已冻结的补缴快照，失败后保留快照以便原样重试。
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func confirmSettlement() async {
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guard settlementState != .processing else { return }
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guard let request = preparedRequest else {
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settlementState = .failed(OfflineCollectionError.noPendingRecords.localizedDescription)
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onStateChange?()
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return
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}
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settlementState = .processing
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onStateChange?()
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do {
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let batch = try await service.settleDailyCollections(request: request, context: context)
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preparedRequest = nil
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settlementState = .success(batch)
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load()
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} catch {
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settlementState = .failed(error.localizedDescription)
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load()
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}
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}
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/// 将成功或失败反馈恢复为可操作状态。
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func clearSettlementFeedback() {
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guard settlementState != .processing else { return }
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settlementState = .idle
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onStateChange?()
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}
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/// 开发环境下将下一次 Mock 补缴设为失败。
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func simulateNextSettlementFailure() {
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service.simulateNextSettlementFailure()
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}
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}
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