Add MinDaysOld Filter

#30

FreePackages.Tests/Filters.cs

@@ -414,4 +414,21 @@ public void CanFilterByWishlist() {
 
 		Assert.IsTrue(PackageFilter.IsAppWantedByFilter(app, Filter));
 	}
+
+	[TestMethod]
+	public void CanFilterByReleaseDate() {
+		var app = new FilterableApp(KeyValue.LoadAsText("app_which_is_free.txt"));
+
+		Filter.MinDaysOld = 0;
+
+		Assert.IsTrue(PackageFilter.IsAppWantedByFilter(app, Filter));
+
+		Filter.MinDaysOld = 1;
+
+		Assert.IsFalse(PackageFilter.IsAppWantedByFilter(app, Filter));
+
+		Filter.MinDaysOld = 20000;
+
+		Assert.IsTrue(PackageFilter.IsAppWantedByFilter(app, Filter));
+	}
 }

FreePackages/Data/FilterConfig.cs

@@ -58,6 +58,9 @@ internal sealed class FilterConfig {
 		[JsonInclude]
 		internal bool WishlistOnly { get; set; } = false;
 
+		[JsonInclude]
+		internal uint MinDaysOld { get; set; } = 0;
+
 		[JsonConstructor]
 		internal FilterConfig() { }
 	}

FreePackages/Data/FilterableApp.cs

@@ -27,6 +27,7 @@ internal sealed class FilterableApp {
 		internal uint PlayTestType;
 		internal List<string>? OSList;
 		internal uint DeckCompatibility;
+		internal DateTime SteamReleaseDate;
 		internal bool Hidden;
 
 		internal FilterableApp(SteamApps.PICSProductInfoCallback.PICSProductInfo productInfo) : this(productInfo.ID, productInfo.KeyValues) {}
@@ -55,6 +56,7 @@ internal FilterableApp(uint id, KeyValue kv) {
 			PlayTestType = kv["extended"]["playtest_type"].AsUnsignedInteger();
 			OSList = kv["common"]["oslist"].AsString()?.ToUpper().Split(",").ToList();
 			DeckCompatibility = kv["common"]["steam_deck_compatibility"]["category"].AsUnsignedInteger();
+			SteamReleaseDate = DateTimeOffset.FromUnixTimeSeconds(kv["common"]["steam_release_date"].AsUnsignedInteger()).UtcDateTime;
 			Hidden = kv["common"] == KeyValue.Invalid;
 
 			// Fix the category for games which do have trading cards, but which don't have the trading card category, Ex: https://steamdb.info/app/316260/

FreePackages/Handlers/PackageFilter.cs

@@ -129,6 +129,11 @@ internal bool IsAppWantedByFilter(FilterableApp app, FilterConfig filter) {
 				// Unwated to due not being wishlisted or followed on the Steam storefront
 				return false;
 			}
+
+			if (filter.MinDaysOld > 0 && DateTime.UtcNow.AddDays(-filter.MinDaysOld) > app.SteamReleaseDate) {
+				// Unwanted because the app isn't new enough
+				return false;
+			}
 
 			return true;
 		}

README.md

@@ -63,6 +63,7 @@ By default, the plugin will attempt to activate all free non-playtest packages.
   "Languages": [],
   "Systems": [],
   "MinReviewScore": 0,
+  "MinDaysOld": 0,
   "IgnoredContentDescriptors": [],
   "IgnoredTypes": [],
   "IgnoredTags": [],
@@ -306,6 +307,12 @@ All filter options are explained below:
 
 ---
 
+#### MinDaysOld
+
+`uint` type with default value of `0`.  Packages must contain an app with a Steam release date newer than this many days or they will not be added to your account.  You can leave this at `0` to allow for all values.
+
+---
+
 #### IgnoredContentDescriptors
 
 `HashSet<uint>` type with default value of `[]`.  Packages containing apps with any of the `ContentDescriptorIDs` specified here will not be added to your account.  Detailed information about content descriptors can be found [here](https://store.steampowered.com/account/preferences/) under "Mature Content Filtering".