添加景区选择与合作订单流程并对齐 Android

suixinkan/Features/CooperationOrder/ViewModels/CooperationOrderListViewModel.swift

@@ -0,0 +1,129 @@
+//
+//  CooperationOrderListViewModel.swift
+//  suixinkan
+//
+
+import Foundation
+
+/// 合作订单列表 ViewModel，对齐 Android `CooperationOrderListViewModel`。
+final class CooperationOrderListViewModel {
+
+    private(set) var selectedTab = 0
+    private(set) var searchText = ""
+    private(set) var leads: [ReferralLeadEntity] = []
+    private(set) var orders: [AcquisitionOrderEntity] = []
+    private(set) var isRefreshing = false
+    private(set) var isLoadingMore = false
+    private(set) var canLoadMore = false
+
+    var onStateChange: (() -> Void)?
+    var onShowMessage: ((String) -> Void)?
+
+    private let pageSize = 10
+    private var leadsPage = 1
+    private var ordersPage = 1
+    private var leadsTotal = 0
+    private var ordersTotal = 0
+
+    func onTabSelected(_ index: Int) {
+        guard selectedTab != index else { return }
+        selectedTab = index
+        notifyStateChange()
+    }
+
+    func onSearchTextChange(_ text: String) {
+        searchText = text
+        notifyStateChange()
+    }
+
+    func refreshCurrentTab(api: OrderAPI) async {
+        if selectedTab == 0 {
+            await refreshLeads(api: api)
+        } else {
+            await refreshAcquisitionOrders(api: api)
+        }
+    }
+
+    func refreshLeads(api: OrderAPI) async {
+        leadsPage = 1
+        isRefreshing = true
+        isLoadingMore = false
+        notifyStateChange()
+        await loadLeads(api: api)
+    }
+
+    func refreshAcquisitionOrders(api: OrderAPI) async {
+        ordersPage = 1
+        isRefreshing = true
+        isLoadingMore = false
+        notifyStateChange()
+        await loadAcquisitionOrders(api: api)
+    }
+
+    func loadMore(api: OrderAPI) async {
+        guard !isRefreshing, !isLoadingMore, canLoadMore else { return }
+        isLoadingMore = true
+        notifyStateChange()
+        if selectedTab == 0 {
+            leadsPage += 1
+            await loadLeads(api: api)
+        } else {
+            ordersPage += 1
+            await loadAcquisitionOrders(api: api)
+        }
+    }
+
+    func shouldLoadMore(at index: Int) -> Bool {
+        guard canLoadMore, !isRefreshing, !isLoadingMore else { return false }
+        let count = selectedTab == 0 ? leads.count : orders.count
+        return index >= max(0, count - 3)
+    }
+
+    private func loadLeads(api: OrderAPI) async {
+        do {
+            let response = try await api.referralLeads(
+                page: String(leadsPage),
+                pageSize: String(pageSize)
+            )
+            leadsTotal = response.total
+            if leadsPage == 1 {
+                leads = response.list
+            } else {
+                leads.append(contentsOf: response.list)
+            }
+            canLoadMore = leads.count < leadsTotal
+        } catch {
+            onShowMessage?(error.localizedDescription)
+        }
+        isRefreshing = false
+        isLoadingMore = false
+        notifyStateChange()
+    }
+
+    private func loadAcquisitionOrders(api: OrderAPI) async {
+        let keyword = searchText.trimmingCharacters(in: .whitespacesAndNewlines)
+        do {
+            let response = try await api.acquisitionOrders(
+                keyword: keyword.isEmpty ? nil : keyword,
+                page: String(ordersPage),
+                pageSize: String(pageSize)
+            )
+            ordersTotal = response.total
+            if ordersPage == 1 {
+                orders = response.list
+            } else {
+                orders.append(contentsOf: response.list)
+            }
+            canLoadMore = orders.count < ordersTotal
+        } catch {
+            onShowMessage?(error.localizedDescription)
+        }
+        isRefreshing = false
+        isLoadingMore = false
+        notifyStateChange()
+    }
+
+    private func notifyStateChange() {
+        onStateChange?()
+    }
+}