init: init proj

DDYSClient/ViewModels/BrowseViewModel.swift

@@ -0,0 +1,98 @@
+import Foundation
+
+@Observable
+final class BrowseViewModel {
+    var items: [ContentItem] = []
+    var category: ContentCategory = .movie
+    var filter = FilterState()
+    var currentPage = 1
+    var totalPages = 1
+    var isLoading = false
+    var isLoadingMore = false
+    var error: String?
+
+    private var cacheKey: String {
+        "\(category.rawValue)_\(filter.sort)_\(filter.genre)_\(filter.region)_\(filter.year)"
+    }
+
+    var hasData: Bool {
+        !items.isEmpty
+    }
+
+    @MainActor
+    func loadContentIfNeeded() async {
+        if hasData && !ContentCache.shared.isExpired(key: cacheKey) {
+            return
+        }
+        await loadContent()
+    }
+
+    @MainActor
+    func loadContent() async {
+        isLoading = true
+        error = nil
+        currentPage = 1
+        totalPages = 1
+        items = []
+
+        do {
+            let html = try await APIClient.shared.fetchCategoryPage(
+                category: category,
+                page: 1,
+                filter: filter
+            )
+            let newItems = try HTMLParser.parseContentList(html: html, defaultCategory: category)
+            let pagination = try HTMLParser.parsePagination(html: html)
+
+            self.items = newItems
+            self.currentPage = pagination.current
+            self.totalPages = pagination.total
+
+            ContentCache.shared.markFresh(key: cacheKey)
+        } catch is CancellationError {
+        } catch let error as URLError where error.code == .cancelled {
+        } catch {
+            self.error = error.localizedDescription
+        }
+
+        isLoading = false
+    }
+
+    @MainActor
+    func loadMore() async {
+        guard !isLoadingMore, !isLoading, currentPage < totalPages else { return }
+        isLoadingMore = true
+
+        let nextPage = currentPage + 1
+        do {
+            let html = try await APIClient.shared.fetchCategoryPage(
+                category: category,
+                page: nextPage,
+                filter: filter
+            )
+            let newItems = try HTMLParser.parseContentList(html: html, defaultCategory: category)
+            let pagination = try HTMLParser.parsePagination(html: html)
+
+            self.items.append(contentsOf: newItems)
+            self.currentPage = pagination.current
+            self.totalPages = pagination.total
+        } catch is CancellationError {
+        } catch let error as URLError where error.code == .cancelled {
+        } catch {
+            // 加载更多失败不显示全局错误，允许重试
+        }
+
+        isLoadingMore = false
+    }
+
+    func changeCategory(_ newCategory: ContentCategory) async {
+        category = newCategory
+        filter = FilterState()
+        await loadContentIfNeeded()
+    }
+
+    func applyFilter(_ newFilter: FilterState) async {
+        filter = newFilter
+        await loadContent()
+    }
+}