feat: add iOS travel album photo preview

suixinkan/UI/TravelAlbum/TravelAlbumDetailViewController.swift

@@ -11,6 +11,7 @@ import UIKit
 final class TravelAlbumDetailViewController: BaseViewController {
     private let viewModel: TravelAlbumDetailViewModel
     private let api: any TravelAlbumServing
+    private let previewConfiguration: TravelAlbumPreviewConfiguration
 
     private let contentView = UIView()
     private let infoCard = TravelAlbumInfoCard()
@@ -27,9 +28,14 @@ final class TravelAlbumDetailViewController: BaseViewController {
     private let deleteSelectedButton = UIButton(type: .system)
     private let uploadButton = UIButton(type: .system)
 
-    init(albumId: Int, api: (any TravelAlbumServing)? = nil) {
+    init(
+        albumId: Int,
+        api: (any TravelAlbumServing)? = nil,
+        previewConfiguration: TravelAlbumPreviewConfiguration = .init()
+    ) {
         viewModel = TravelAlbumDetailViewModel(albumId: albumId)
         self.api = api ?? NetworkServices.shared.travelAlbumAPI
+        self.previewConfiguration = previewConfiguration
         super.init(nibName: nil, bundle: nil)
     }
 
@@ -413,12 +419,36 @@ final class TravelAlbumDetailViewController: BaseViewController {
         )
         navigationController?.pushViewController(controller, animated: true)
     }
+
+    private func presentPreview(startingWith material: TravelAlbumMaterial) {
+        guard let startIndex = viewModel.materials.firstIndex(where: { $0.id == material.id }) else { return }
+        let previewViewModel = viewModel
+        let previewAPI = api
+        let controller = TravelAlbumPhotoPreviewViewController(
+            projects: viewModel.materials.map(TravelAlbumPreviewProject.init(material:)),
+            totalCount: viewModel.currentPhotoCount,
+            startProjectIndex: startIndex,
+            configuration: previewConfiguration,
+            loadMore: {
+                await previewViewModel.loadMaterials(reset: false, api: previewAPI)
+                return (
+                    previewViewModel.materials.map(TravelAlbumPreviewProject.init(material:)),
+                    previewViewModel.currentPhotoCount
+                )
+            }
+        )
+        present(controller, animated: true)
+    }
 }
 
 extension TravelAlbumDetailViewController: UICollectionViewDelegate {
     func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
         guard let material = dataSource.itemIdentifier(for: indexPath) else { return }
-        viewModel.toggleMaterialSelection(material)
+        if viewModel.isSelectionMode {
+            viewModel.toggleMaterialSelection(material)
+        } else {
+            presentPreview(startingWith: material)
+        }
     }
 
     func scrollViewDidScroll(_ scrollView: UIScrollView) {