feat(payment): 支持赛里木湖品牌收款页与独立缓存

suixinkan/Features/Payment/ViewModels/PaymentCollectionDetailsViewModel.swift

@@ -42,9 +42,7 @@ final class PaymentCollectionDetailsViewModel {
         scenicName = appStore.session.currentScenicName
         staffId = appStore.session.userId
         isVoiceBroadcastOpen = appStore.payment.isOpenReceiveVoice
-        if PayPageBrandingPolicy.isNalati(scenicId: scenicId) {
-            payPageConfig = payPageConfigCache.config(scenicId: scenicId) ?? .nalatiDefault
-        }
+        restorePayPageConfig()
     }
 
     var hasPayCode: Bool {
@@ -60,8 +58,26 @@ final class PaymentCollectionDetailsViewModel {
         scenicName.isEmpty ? "暂无景区" : scenicName
     }
 
-    var usesNalatiBranding: Bool {
-        PayPageBrandingPolicy.isNalati(scenicId: scenicId)
+    /// 是否启用品牌收款页，包含那拉提与赛里木湖。
+    var usesBranding: Bool {
+        PayPageBrandingPolicy.defaultConfig(scenicId: scenicId) != nil
+    }
+
+    /// 当前景区的随包背景资源名称。
+    var brandBackgroundAssetName: String {
+        scenicId == PayPageBrandingPolicy.sailimuScenicId
+            ? "payment_sailimu_background" : "payment_nalati_background"
+    }
+
+    /// 当前景区的随包 Logo 资源名称。
+    var brandLogoAssetName: String {
+        scenicId == PayPageBrandingPolicy.sailimuScenicId
+            ? "payment_sailimu_logo" : "payment_nalati_logo"
+    }
+
+    /// 品牌主标题的最大行数，赛里木湖允许两行展示。
+    var brandTitleNumberOfLines: Int {
+        scenicId == PayPageBrandingPolicy.sailimuScenicId ? 2 : 1
     }
 
     var displayPhotographerName: String {
@@ -80,14 +96,18 @@ final class PaymentCollectionDetailsViewModel {
         scenicName = appStore.session.currentScenicName
         staffId = appStore.session.userId
         isVoiceBroadcastOpen = appStore.payment.isOpenReceiveVoice
-        if usesNalatiBranding {
-            payPageConfig = payPageConfigCache.config(scenicId: scenicId) ?? .nalatiDefault
-        } else {
-            payPageConfig = .nalatiDefault
-        }
+        restorePayPageConfig()
         notifyStateChange()
     }
 
+    private func restorePayPageConfig() {
+        guard let defaults = PayPageBrandingPolicy.defaultConfig(scenicId: scenicId) else {
+            payPageConfig = .nalatiDefault
+            return
+        }
+        payPageConfig = payPageConfigCache.config(scenicId: scenicId) ?? defaults
+    }
+
     func loadPayCode(api: PaymentAPI) async {
         guard !loading else { return }
         loading = true
@@ -116,12 +136,14 @@ final class PaymentCollectionDetailsViewModel {
 
     func loadPayPageConfig(api: PaymentAPI) async {
         let requestedScenicId = appStore.session.currentScenicId
-        guard PayPageBrandingPolicy.isNalati(scenicId: requestedScenicId) else { return }
+        guard let defaults = PayPageBrandingPolicy.defaultConfig(scenicId: requestedScenicId) else { return }
 
         do {
             let response = try await api.payPageConfig(scenicId: requestedScenicId)
-            guard appStore.session.currentScenicId == requestedScenicId else { return }
-            let resolved = payPageConfig.merging(response)
+            guard appStore.session.currentScenicId == requestedScenicId,
+                  scenicId == requestedScenicId else { return }
+            let cached = payPageConfigCache.config(scenicId: requestedScenicId) ?? defaults
+            let resolved = cached.merging(response)
             payPageConfigCache.save(resolved, scenicId: requestedScenicId)
             payPageConfig = resolved
             brandingRefreshVersion += 1