Refactor TFI for project structure

WorkspaceActivitySupport/WorkspaceActivityAttributes.swift

@@ -0,0 +1,65 @@
+import ActivityKit
+import Foundation
+
+/// One activity summarizes all mobile workspaces. Never contains credentials or terminal output.
+nonisolated struct WorkspaceActivityAttributes: ActivityAttributes {
+    struct Session: Codable, Hashable, Identifiable {
+        var id: UUID
+        var title: String
+        var kind: String
+        var connected: Bool
+        var iconAsset: String? = nil
+
+        var symbol: String { "server.rack" }
+        var destinationURL: URL { WorkspaceActivityAttributes.destinationURL(for: id) }
+    }
+
+    struct ContentState: Codable, Hashable {
+        static let maximumPresentedSessionCount = 4
+
+        var workspaceCount: Int
+        var connectedCount: Int
+        /// Bounded to fit ActivityKit's payload and the lock-screen layout.
+        var sessions: [Session] = []
+        var focusedWorkspaceID: UUID?
+
+        static func snapshot(_ workspaces: [Session], focusedID: UUID?) -> Self {
+            let focused = workspaces.first(where: { $0.id == focusedID }) ?? workspaces.last
+            let ordered =
+                focused.map { selected in [selected] + workspaces.filter { $0.id != selected.id } } ?? workspaces
+            let visible = ordered.prefix(maximumPresentedSessionCount).map { session in
+                var session = session
+                session.title = String(decoding: String(session.title.prefix(32)).utf8.prefix(96), as: UTF8.self)
+                return session
+            }
+            return Self(
+                workspaceCount: workspaces.count, connectedCount: workspaces.filter(\.connected).count,
+                sessions: visible, focusedWorkspaceID: focused?.id)
+        }
+
+        var destinationURL: URL {
+            focusedWorkspaceID.map(WorkspaceActivityAttributes.destinationURL(for:))
+                ?? WorkspaceActivityAttributes.destinationURL
+        }
+    }
+
+    var scope = "workspaces"
+
+    static var destinationURL: URL { URL(string: "termind://workspaces")! }
+
+    static func destinationURL(for workspaceID: UUID) -> URL {
+        URL(string: "termind://workspace/\(workspaceID.uuidString)")!
+    }
+
+    static func accepts(_ url: URL) -> Bool {
+        url.scheme == "termind" && url.host == "workspaces"
+            && (url.path.isEmpty || url.path == "/") && url.query == nil && url.fragment == nil
+    }
+
+    static func workspaceID(from url: URL) -> UUID? {
+        guard url.scheme == "termind", url.host == "workspace",
+            url.query == nil, url.fragment == nil, url.pathComponents.count == 2
+        else { return nil }
+        return UUID(uuidString: url.lastPathComponent)
+    }
+}