harden system status and app reliabilityv2.13.1

1 files changed, 59 insertions, 0 deletions

diff --git a/Hutch/Networking/SystemStatusCacheStore.swift b/Hutch/Networking/SystemStatusCacheStore.swift
new file mode 100644
index 0000000..63c64b9
--- /dev/null
+++ b/Hutch/Networking/SystemStatusCacheStore.swift
@@ -0,0 +1,59 @@
+import Foundation
+
+actor SystemStatusCacheStore {
+    private let snapshotCacheKey = "systemStatusSnapshotCache"
+    private let incidentCacheKey = "systemStatusIncidentCache"
+    private let defaults: UserDefaults
+
+    init(defaults: UserDefaults = .standard) {
+        self.defaults = defaults
+    }
+
+    func loadSnapshotHTML() -> (html: String, timestamp: Date)? {
+        guard let html = defaults.string(forKey: snapshotCacheKey) else {
+            return nil
+        }
+
+        let timestampValue = defaults.double(forKey: snapshotTimestampKey)
+        guard timestampValue > 0 else {
+            defaults.removeObject(forKey: snapshotCacheKey)
+            defaults.removeObject(forKey: snapshotTimestampKey)
+            return nil
+        }
+
+        return (html, Date(timeIntervalSince1970: timestampValue))
+    }
+
+    func saveSnapshotHTML(_ html: String, timestamp: Date) {
+        defaults.set(html, forKey: snapshotCacheKey)
+        defaults.set(timestamp.timeIntervalSince1970, forKey: snapshotTimestampKey)
+    }
+
+    func loadIncidentFeedData() -> (data: Data, timestamp: Date)? {
+        guard let data = defaults.data(forKey: incidentCacheKey) else {
+            return nil
+        }
+
+        let timestampValue = defaults.double(forKey: incidentTimestampKey)
+        guard timestampValue > 0 else {
+            defaults.removeObject(forKey: incidentCacheKey)
+            defaults.removeObject(forKey: incidentTimestampKey)
+            return nil
+        }
+
+        return (data, Date(timeIntervalSince1970: timestampValue))
+    }
+
+    func saveIncidentFeedData(_ data: Data, timestamp: Date) {
+        defaults.set(data, forKey: incidentCacheKey)
+        defaults.set(timestamp.timeIntervalSince1970, forKey: incidentTimestampKey)
+    }
+
+    private var snapshotTimestampKey: String {
+        "\(snapshotCacheKey).timestamp"
+    }
+
+    private var incidentTimestampKey: String {
+        "\(incidentCacheKey).timestamp"
+    }
+}