Add repository file browser

ios/Sources/ContentScreens.swift

@@ -502,11 +502,15 @@ final class PullsViewController: RefreshingTableViewController {
 
 @MainActor
 final class CommitsViewController: RefreshingTableViewController {
+    private enum Mode: Int { case history, files }
+
     private let context: AppContext
     private let owner: String
     private let repository: String
     private var page: CommitPage?
+    private var contents: [RepositoryContentRow] = []
     private var branch: String?
+    private var mode = Mode.history
 
     init(context: AppContext, owner: String, repository: String) {
         self.context = context
@@ -522,6 +526,11 @@ final class CommitsViewController: RefreshingTableViewController {
     override func viewDidLoad() {
         super.viewDidLoad()
         tableView.register(CommitCell.self, forCellReuseIdentifier: "commit")
+        let modeControl = UISegmentedControl(items: ["History", "Files"])
+        modeControl.selectedSegmentIndex = mode.rawValue
+        modeControl.addTarget(self, action: #selector(modeChanged(_:)), for: .valueChanged)
+        modeControl.accessibilityLabel = "Repository view"
+        navigationItem.titleView = modeControl
         updateBranchMenu()
         loadContent(refreshing: false)
     }
@@ -531,16 +540,23 @@ final class CommitsViewController: RefreshingTableViewController {
         loadingTask?.cancel()
         loadingTask = Task {
             do {
-                page = try await context.core.commits(
-                    owner: owner,
-                    repository: repository,
-                    branch: branch
-                )
-                updateBranchMenu()
+                switch mode {
+                case .history:
+                    page = try await context.core.commits(
+                        owner: owner,
+                        repository: repository,
+                        branch: branch
+                    )
+                    updateBranchMenu()
+                case .files:
+                    contents = try await context.core.repositoryContents(
+                        owner: owner,
+                        repository: repository,
+                        path: ""
+                    )
+                }
                 tableView.reloadData()
-                tableView.backgroundView = page?.commits.isEmpty == true
-                    ? EmptyBackgroundView(title: "No commits", detail: "This repository has no commit history.")
-                    : nil
+                updateEmptyView()
             } catch {
                 if !Task.isCancelled { show(error: error) }
             }
@@ -549,34 +565,75 @@ final class CommitsViewController: RefreshingTableViewController {
     }
 
     override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
-        page?.commits.count ?? 0
+        mode == .history ? page?.commits.count ?? 0 : contents.count
     }
 
     override func tableView(
         _ tableView: UITableView,
         cellForRowAt indexPath: IndexPath
     ) -> UITableViewCell {
-        let cell = tableView.dequeueReusableCell(withIdentifier: "commit", for: indexPath) as! CommitCell
-        if let page { cell.configure(page.commits[indexPath.row], laneCount: page.laneCount) }
-        return cell
+        switch mode {
+        case .history:
+            let cell = tableView.dequeueReusableCell(withIdentifier: "commit", for: indexPath) as! CommitCell
+            if let page { cell.configure(page.commits[indexPath.row], laneCount: page.laneCount) }
+            return cell
+        case .files:
+            let cell = tableView.dequeueReusableCell(withIdentifier: "repository-content")
+                ?? UITableViewCell(style: .subtitle, reuseIdentifier: "repository-content")
+            configureRepositoryContentCell(cell, row: contents[indexPath.row])
+            return cell
+        }
     }
 
     override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
-        86
+        mode == .history ? 86 : UITableView.automaticDimension
     }
 
     override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
         tableView.deselectRow(at: indexPath, animated: true)
-        guard let row = page?.commits[indexPath.row] else { return }
-        navigationController?.pushViewController(
-            FilesViewController(
+        switch mode {
+        case .history:
+            guard let row = page?.commits[indexPath.row] else { return }
+            navigationController?.pushViewController(
+                FilesViewController(
+                    context: context,
+                    owner: owner,
+                    repository: repository,
+                    sha: row.sha
+                ),
+                animated: true
+            )
+        case .files:
+            showRepositoryContent(
+                contents[indexPath.row],
                 context: context,
                 owner: owner,
                 repository: repository,
-                sha: row.sha
-            ),
-            animated: true
-        )
+                navigationController: navigationController
+            )
+        }
+    }
+
+    @objc private func modeChanged(_ sender: UISegmentedControl) {
+        guard let mode = Mode(rawValue: sender.selectedSegmentIndex), mode != self.mode else { return }
+        self.mode = mode
+        navigationItem.rightBarButtonItem = nil
+        if mode == .history { updateBranchMenu() }
+        tableView.reloadData()
+        loadContent(refreshing: false)
+    }
+
+    private func updateEmptyView() {
+        switch mode {
+        case .history:
+            tableView.backgroundView = page?.commits.isEmpty == true
+                ? EmptyBackgroundView(title: "No commits", detail: "This repository has no commit history.")
+                : nil
+        case .files:
+            tableView.backgroundView = contents.isEmpty
+                ? EmptyBackgroundView(title: "No files", detail: "This repository is empty.")
+                : nil
+        }
     }
 
     private func updateBranchMenu() {