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suixinkan/App/State/AccountContext.swift

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+//
+//  AccountContext.swift
+//  suixinkan
+//
+//  Created by Codex on 2026/6/18.
+//
+
+import Observation
+
+/// 当前账号的基础资料实体，用于跨页面展示昵称、手机号和头像。
+struct AccountProfile: Codable, Equatable {
+    var userId: String
+    var displayName: String
+    var phone: String?
+    var avatarURL: String?
+}
+
+/// 当前业务作用域实体，表示景区或门店维度的上下文。
+struct BusinessScope: Codable, Equatable, Identifiable {
+    /// 业务作用域类型，用于区分景区和门店。
+    enum Kind: Codable, Equatable {
+        case scenic
+        case store
+    }
+
+    var id: Int
+    var name: String
+    var kind: Kind
+    var parentScenicId: Int?
+
+    /// 创建业务作用域，门店可通过 parentScenicId 标记所属景区。
+    init(id: Int, name: String, kind: Kind, parentScenicId: Int? = nil) {
+        self.id = id
+        self.name = name
+        self.kind = kind
+        self.parentScenicId = parentScenicId
+    }
+}
+
+@MainActor
+@Observable
+/// 账号上下文状态中心，保存当前账号资料和景区/门店作用域。
+final class AccountContext {
+    private(set) var profile: AccountProfile?
+    private(set) var scenicScopes: [BusinessScope] = []
+    private(set) var storeScopes: [BusinessScope] = []
+    var currentScenic: BusinessScope?
+    var currentStore: BusinessScope?
+
+    /// 应用登录成功后写入账号资料。
+    func applyLogin(profile: AccountProfile? = nil) {
+        self.profile = profile
+    }
+
+    /// 替换当前账号资料，通常用于用户信息刷新后同步全局展示。
+    func replaceProfile(_ profile: AccountProfile?) {
+        self.profile = profile
+    }
+
+    /// 替换景区和门店作用域，并尽量保持当前选择不变。
+    func replaceScopes(
+        scenic: [BusinessScope],
+        stores: [BusinessScope],
+        currentScenicId: Int? = nil,
+        currentStoreId: Int? = nil
+    ) {
+        scenicScopes = scenic
+        storeScopes = stores
+        currentScenic = currentScenicId.flatMap { id in
+            scenic.first { $0.id == id }
+        } ?? currentScenic.flatMap { current in
+            scenic.first { $0.id == current.id }
+        } ?? scenic.first
+        currentStore = resolvedStore(
+            in: stores,
+            currentScenic: currentScenic,
+            preferredStoreId: currentStoreId ?? currentStore?.id
+        )
+    }
+
+    /// 切换当前景区，并按景区重新校准当前门店。
+    func selectScenic(id scenicId: Int) {
+        guard let scenic = scenicScopes.first(where: { $0.id == scenicId }) else { return }
+        currentScenic = scenic
+        currentStore = resolvedStore(
+            in: storeScopes,
+            currentScenic: scenic,
+            preferredStoreId: currentStore?.id
+        )
+    }
+
+    /// 切换当前门店，并在门店有关联景区时同步当前景区。
+    func selectStore(id storeId: Int) {
+        guard let store = storeScopes.first(where: { $0.id == storeId }) else { return }
+        currentStore = store
+        if let scenicId = store.parentScenicId,
+           currentScenic?.id != scenicId,
+           let scenic = scenicScopes.first(where: { $0.id == scenicId }) {
+            currentScenic = scenic
+        }
+    }
+
+    /// 清空账号上下文，通常在退出登录时调用。
+    func reset() {
+        profile = nil
+        scenicScopes = []
+        storeScopes = []
+        currentScenic = nil
+        currentStore = nil
+    }
+
+    /// 按当前景区和期望门店 ID 选择有效门店。
+    private func resolvedStore(
+        in stores: [BusinessScope],
+        currentScenic: BusinessScope?,
+        preferredStoreId: Int?
+    ) -> BusinessScope? {
+        let scenicId = currentScenic?.id
+        let storesForScenic = stores.filter { store in
+            guard let scenicId else { return true }
+            return store.parentScenicId == nil || store.parentScenicId == scenicId
+        }
+        if let preferredStoreId,
+           let store = storesForScenic.first(where: { $0.id == preferredStoreId }) {
+            return store
+        }
+        return storesForScenic.first
+    }
+}