private Dictionary <DateTime, long> GetTimelineStats([NotNull] CSRedisClient redis, [NotNull] string type)
        {
            if (type == null)
            {
                throw new ArgumentNullException(nameof(type));
            }

            var endDate   = DateTime.UtcNow.Date;
            var startDate = endDate.AddDays(-7);
            var dates     = new List <DateTime>();

            while (startDate <= endDate)
            {
                dates.Add(endDate);
                endDate = endDate.AddDays(-1);
            }

            var keys = dates.Select(x => _storage.GetRedisKey($"stats:{type}:{x:yyyy-MM-dd}")).ToArray();

            var valuesMap = redis.GetValuesMap(keys);

            var result = new Dictionary <DateTime, long>();

            for (var i = 0; i < dates.Count; i++)
            {
                long value;
                if (!long.TryParse(valuesMap[valuesMap.Keys.ElementAt(i)], out value))
                {
                    value = 0;
                }
                result.Add(dates[i], value);
            }

            return(result);
        }