Expose update time

Author: aodhol

Sources/SPTPersistentCache.m

@@ -582,7 +582,8 @@ - (void)loadDataForKeySync:(NSString *)key
             SPTPersistentCacheRecord *record = [[SPTPersistentCacheRecord alloc] initWithData:payload
                                                                                           key:key
                                                                                      refCount:refCount
-                                                                                          ttl:ttl];
+                                                                                          ttl:ttl
+                                                                                   updateTime:localHeader.updateTimeSec];
 
             SPTPersistentCacheResponse *response = [[SPTPersistentCacheResponse alloc] initWithResult:SPTPersistentCacheResponseCodeOperationSucceeded
                                                                                                 error:nil

Sources/SPTPersistentCacheRecord.m

@@ -29,13 +29,23 @@ - (instancetype)initWithData:(NSData *)data
                          key:(NSString *)key
                     refCount:(NSUInteger)refCount
                          ttl:(NSUInteger)ttl
+{
+    return [self initWithData:data key:key refCount:refCount ttl:ttl updateTime:0];
+}
+
+- (instancetype)initWithData:(NSData *)data
+                         key:(NSString *)key
+                    refCount:(NSUInteger)refCount
+                         ttl:(NSUInteger)ttl
+                  updateTime:(NSTimeInterval)updateTime
 {
     self = [super init];
     if (self) {
         _refCount = refCount;
         _ttl = ttl;
         _key = [key copy];
         _data = data;
+        _updateTime = updateTime;
     }
     return self;
 }
@@ -49,7 +59,7 @@ - (NSString *)description
 
 - (NSString *)debugDescription
 {
-    return SPTPersistentCacheObjectDescription(self, self.key, @"key", @(self.ttl), @"ttl", @(self.refCount), @"ref-count");
+    return SPTPersistentCacheObjectDescription(self, self.key, @"key", @(self.ttl), @"ttl", @(self.updateTime), @"updated", @(self.refCount), @"ref-count");
 }
 
 @end

include/SPTPersistentCache/SPTPersistentCacheRecord.h

@@ -48,6 +48,10 @@ NS_ASSUME_NONNULL_BEGIN
  Data that was initially passed into storeData:...
  */
 @property (nonatomic, strong, readonly) NSData *data;
+/*
+ * Update time of the record (when it was last stored or accessed)
+ */
+@property (nonatomic, assign, readonly) NSTimeInterval updateTime;
 
 @end