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refactor: reduce number of map checks

This commit is contained in:
Anna 2021-03-21 12:14:29 -04:00
parent e7d5153bfc
commit 2806585555
1 changed files with 15 additions and 8 deletions
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23
Tourist/Util.cs
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@ -49,7 +49,7 @@ namespace Tourist {
return 41f / c * ((val + 1024f) / 2048f) + 1;
}
public static DateTimeOffset EorzeaTime(DateTimeOffset? at = null) {
private static DateTimeOffset EorzeaTime(DateTimeOffset? at = null) {
at ??= DateTimeOffset.UtcNow;
return DateTimeOffset.FromUnixTimeMilliseconds(at.Value.ToUnixTimeMilliseconds() * 144 / 7);
}
@ -65,15 +65,22 @@ namespace Tourist {
var actualNow = DateTimeOffset.UtcNow;
if (!Availability.ContainsKey(adventure.RowId) && adventure.Available(service)) {
var ends = adventure.AvailabilityEnds(service, DateTimeOffset.Now) ?? default;
Availability[adventure.RowId] = (DateTimeOffset.Now, ends);
var contains = Availability.TryGetValue(adventure.RowId, out var cached);
switch (contains) {
// if the cache doesn't have this vista but it's currently available
case false when adventure.Available(service): {
// determine the end availability and store that
var ends = adventure.AvailabilityEnds(service, DateTimeOffset.Now) ?? default;
Availability[adventure.RowId] = (DateTimeOffset.Now, ends);
break;
}
// use the cached value if it hasn't expired
case true when cached.end >= actualNow:
return cached;
}
// check the cache and use that if it's not expired
if (Availability.TryGetValue(adventure.RowId, out var cached) && cached.end >= actualNow) {
return cached;
}
// otherwise, calculate and cache the availability
var eorzea = EorzeaTime(actualNow);
// start at a clean hour