feat: 更新素材管理和举报风险地图

suixinkan/Features/Setting/ViewModels/SettingViewModel.swift

@@ -0,0 +1,87 @@
+//
+//  SettingViewModel.swift
+//  suixinkan
+//
+
+import Foundation
+
+/// 设置中心 ViewModel，管理版本展示、协议入口和更新标记。
+final class SettingViewModel {
+    private let infoDictionary: [String: Any]?
+    private let environment: APIEnvironment
+
+    private(set) var latestVersion: VersionResponse?
+    private(set) var hasNewVersion = false
+
+    var onStateChange: (() -> Void)?
+
+    init(
+        infoDictionary: [String: Any]? = Bundle.main.infoDictionary,
+        environment: APIEnvironment = .current
+    ) {
+        self.infoDictionary = infoDictionary
+        self.environment = environment
+    }
+
+    var appVersion: String {
+        AppClientInfo.appVersion(infoDictionary: infoDictionary)
+    }
+
+    var appDownloadURL: URL {
+        environment.baseURL.appending(path: "h5/app/download")
+    }
+
+    /// 静默检查最新版本，失败时保持当前页面状态。
+    func checkLatestVersion(api: SettingAPI) async {
+        do {
+            let response = try await api.checkLatestVersion()
+            latestVersion = response
+            hasNewVersion = Self.isNewerVersionCode(response.versionCode, than: currentVersionCode(infoDictionary: infoDictionary))
+            notifyStateChange()
+        } catch is CancellationError {
+            return
+        } catch {
+            latestVersion = nil
+            hasNewVersion = false
+            notifyStateChange()
+        }
+    }
+
+    /// 返回指定协议入口的标题和 URL。
+    func agreementDestination(for kind: SettingAgreementKind) -> SettingAgreementDestination {
+        switch kind {
+        case .aboutUs:
+            SettingAgreementDestination(
+                title: "关于我们",
+                url: environment.baseURL.appending(path: "h5/app/about-us")
+            )
+        case .userAgreement:
+            SettingAgreementDestination(
+                title: "用户协议",
+                url: environment.baseURL.appending(path: "h5/app/user-agreement")
+            )
+        case .privacyPolicy:
+            SettingAgreementDestination(
+                title: "隐私政策",
+                url: environment.baseURL.appending(path: "h5/app/privacy-policy")
+            )
+        }
+    }
+
+    /// 判断后端版本号是否高于当前构建号。
+    nonisolated static func isNewerVersionCode(_ latestVersionCode: Int, than currentVersionCode: Int?) -> Bool {
+        guard let currentVersionCode else { return false }
+        return latestVersionCode > currentVersionCode
+    }
+
+    private func currentVersionCode(infoDictionary: [String: Any]?) -> Int? {
+        let build = (infoDictionary?["CFBundleVersion"] as? String)?
+            .trimmingCharacters(in: .whitespacesAndNewlines)
+        guard let build, !build.isEmpty else { return nil }
+        return Int(build)
+    }
+
+    private func notifyStateChange() {
+        onStateChange?()
+    }
+}