Add home activity filters

ios/Sources/ListScreens.swift

@@ -299,8 +299,37 @@ final class RepositoriesViewController: RefreshingTableViewController {
 
 @MainActor
 final class HomeViewController: RefreshingTableViewController {
+    private enum ActivityFilter: Int {
+        case all
+        case issues
+        case pulls
+        case milestones
+
+        func includes(_ row: ActivityRow) -> Bool {
+            switch self {
+            case .all:
+                return true
+            case .issues:
+                return row.icon.contains("issue")
+            case .pulls:
+                return row.icon.contains("pull")
+            case .milestones:
+                // ponytail: Gitea has no milestone event type; use related issue text until it does.
+                return row.icon.contains("milestone")
+                    || row.icon.contains("issue")
+                        && (row.title.localizedCaseInsensitiveContains("milestone")
+                            || row.detail.localizedCaseInsensitiveContains("milestone"))
+            }
+        }
+    }
+
     private let context: AppContext
     private var page: HomePage?
+    private var filter = ActivityFilter.all
+
+    private var activities: [ActivityRow] {
+        page?.activities.filter(filter.includes) ?? []
+    }
 
     init(context: AppContext) {
         self.context = context
@@ -348,9 +377,14 @@ final class HomeViewController: RefreshingTableViewController {
             do {
                 page = try await context.core.home()
                 title = page?.serverName
-                tableView.tableHeaderView = page.map { HeatmapView(page: $0) }
-                tableView.reloadData()
-                tableView.backgroundView = nil
+                tableView.tableHeaderView = page.map { page in
+                    HeatmapView(page: page, selectedFilter: filter.rawValue) { [weak self] index in
+                        guard let self, let filter = ActivityFilter(rawValue: index) else { return }
+                        self.filter = filter
+                        self.updateActivities()
+                    }
+                }
+                updateActivities()
             } catch {
                 if !Task.isCancelled { show(error: error) }
             }
@@ -359,7 +393,7 @@ final class HomeViewController: RefreshingTableViewController {
     }
 
     override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
-        page?.activities.count ?? 0
+        activities.count
     }
 
     override func tableView(
@@ -368,7 +402,7 @@ final class HomeViewController: RefreshingTableViewController {
     ) -> UITableViewCell {
         let cell = tableView.dequeueReusableCell(withIdentifier: "activity")
             ?? UITableViewCell(style: .subtitle, reuseIdentifier: "activity")
-        guard let row = page?.activities[indexPath.row] else { return cell }
+        let row = activities[indexPath.row]
         configureTextCell(
             cell,
             title: row.title,
@@ -385,7 +419,17 @@ final class HomeViewController: RefreshingTableViewController {
 
     override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
         tableView.deselectRow(at: indexPath, animated: true)
-        if let row = page?.activities[indexPath.row] { context.route(row) }
+        context.route(activities[indexPath.row])
+    }
+
+    private func updateActivities() {
+        tableView.reloadData()
+        tableView.backgroundView = activities.isEmpty
+            ? EmptyBackgroundView(
+                title: "No matching activity",
+                detail: "This server has no recent activity of the selected type."
+            )
+            : nil
     }
 
     private func symbolName(for icon: String) -> String {
@@ -405,7 +449,7 @@ final class HeatmapView: UIView {
     private let cells: [HeatCell]
     private let calendar = Calendar(identifier: .gregorian)
 
-    init(page: HomePage) {
+    init(page: HomePage, selectedFilter: Int, onFilter: @escaping (Int) -> Void) {
         let latest = page.heatCells.last.map {
             Date(timeIntervalSince1970: TimeInterval($0.timestamp))
         } ?? Date()
@@ -420,7 +464,7 @@ final class HeatmapView: UIView {
         cells = page.heatCells.filter {
             Date(timeIntervalSince1970: TimeInterval($0.timestamp)) >= firstMonth
         }
-        super.init(frame: CGRect(x: 0, y: 0, width: 0, height: 132))
+        super.init(frame: CGRect(x: 0, y: 0, width: 0, height: 180))
         backgroundColor = .systemBackground
         let title = UILabel(frame: CGRect(x: 16, y: 12, width: 300, height: 22))
         title.text = "Activity · last 9 months"
@@ -432,6 +476,45 @@ final class HeatmapView: UIView {
         total.font = .preferredFont(forTextStyle: .caption1)
         total.textColor = .tertiaryLabel
         addSubview(total)
+        let filters = UIStackView()
+        filters.axis = .horizontal
+        filters.spacing = 4
+        filters.translatesAutoresizingMaskIntoConstraints = false
+        let filterItems = [
+            ("clock", "clock.fill", "All activity"),
+            ("exclamationmark.circle", "exclamationmark.circle.fill", "Issues"),
+            ("arrow.triangle.pull", "arrow.triangle.pull", "Pull requests"),
+            ("flag", "flag.fill", "Milestones"),
+        ]
+        for (index, item) in filterItems.enumerated() {
+            let button = UIButton(type: .custom, primaryAction: UIAction { action in
+                guard
+                    let button = action.sender as? UIButton,
+                    let stack = button.superview as? UIStackView
+                else { return }
+                for case let item as UIButton in stack.arrangedSubviews {
+                    item.isSelected = item === button
+                    item.tintColor = item.isSelected ? .tintColor : .secondaryLabel
+                    item.accessibilityTraits = item.isSelected ? [.button, .selected] : .button
+                }
+                onFilter(button.tag)
+            })
+            button.tag = index
+            button.setImage(UIImage(systemName: item.0), for: .normal)
+            button.setImage(UIImage(systemName: item.1), for: .selected)
+            button.isSelected = index == selectedFilter
+            button.tintColor = button.isSelected ? .tintColor : .secondaryLabel
+            button.accessibilityLabel = item.2
+            button.accessibilityTraits = button.isSelected ? [.button, .selected] : .button
+            button.widthAnchor.constraint(equalToConstant: 44).isActive = true
+            filters.addArrangedSubview(button)
+        }
+        addSubview(filters)
+        NSLayoutConstraint.activate([
+            filters.centerXAnchor.constraint(equalTo: centerXAnchor),
+            filters.topAnchor.constraint(equalTo: topAnchor, constant: 132),
+            filters.heightAnchor.constraint(equalToConstant: 44),
+        ])
     }
 
     @available(*, unavailable)