Improved locking

submodules/AppLockState/Sources/AppLockState.swift

@@ -0,0 +1,62 @@
+import Foundation
+import MonotonicTime
+
+public struct MonotonicTimestamp: Codable, Equatable {
+    public var bootTimestap: Int32
+    public var uptime: Int32
+
+    public init(bootTimestap: Int32, uptime: Int32) {
+        self.bootTimestap = bootTimestap
+        self.uptime = uptime
+    }
+}
+
+public struct UnlockAttempts: Codable, Equatable {
+    public var count: Int32
+    public var wallClockTimestamp: Int32
+
+    public init(count: Int32, wallClockTimestamp: Int32) {
+        self.count = count
+        self.wallClockTimestamp = wallClockTimestamp
+    }
+}
+
+public struct LockState: Codable, Equatable {
+    public var isManuallyLocked: Bool
+    public var autolockTimeout: Int32?
+    public var unlockAttemts: UnlockAttempts?
+    public var applicationActivityTimestamp: MonotonicTimestamp?
+
+    public init(isManuallyLocked: Bool = false, autolockTimeout: Int32? = nil, unlockAttemts: UnlockAttempts? = nil, applicationActivityTimestamp: MonotonicTimestamp? = nil) {
+        self.isManuallyLocked = isManuallyLocked
+        self.autolockTimeout = autolockTimeout
+        self.unlockAttemts = unlockAttemts
+        self.applicationActivityTimestamp = applicationActivityTimestamp
+    }
+}
+
+public func appLockStatePath(rootPath: String) -> String {
+    return rootPath + "/lockState.json"
+}
+
+public func isAppLocked(state: LockState) -> Bool {
+    if state.isManuallyLocked {
+        return true
+    } else if let autolockTimeout = state.autolockTimeout {
+        var bootTimestamp: Int32 = 0
+        let uptime = getDeviceUptimeSeconds(&bootTimestamp)
+        let timestamp = MonotonicTimestamp(bootTimestap: bootTimestamp, uptime: uptime)
+        
+        if let applicationActivityTimestamp = state.applicationActivityTimestamp {
+            if timestamp.bootTimestap != applicationActivityTimestamp.bootTimestap {
+                return true
+            }
+            if timestamp.uptime >= applicationActivityTimestamp.uptime + autolockTimeout {
+                return true
+            }
+        } else {
+            return true
+        }
+    }
+    return false
+}