Fix delete old articles logic

- Fix double-negative in delete query
- Change logic to use days instead of weeks
- Use to_start_date() consistently

plugins/backend/decsync/decsyncInterface.vala

@@ -482,9 +482,7 @@ public class FeedReader.decsyncInterface : FeedServerInterface {
 		var feeds = DataBase.readOnly().read_feeds();
 		var articles = new Gee.ArrayList<Article>();
 		GLib.Mutex mutex = GLib.Mutex();
-		var now = new GLib.DateTime.now_local();
-		int? weeks = ((DropArticles)Settings.general().get_enum("drop-articles-after")).to_weeks();
-		var dropDate = weeks == null ? null : now.add_weeks(-(int)weeks);
+		DateTime? dropDate = ((DropArticles)Settings.general().get_enum("drop-articles-after")).to_start_date();
 
 		try
 		{

src/Backend/FeedServer.vala

@@ -279,10 +279,10 @@ public class FeedReader.FeedServer : GLib.Object {
 			Notification.send(newArticles, new_and_unread);
 		}
 
-		var drop_weeks = drop_articles.to_weeks();
-		if(drop_weeks != null)
+		var article_max_age_days = drop_articles.to_days();
+		if(article_max_age_days != null)
 		{
-			db.dropOldArticles(-(int)drop_weeks);
+			db.dropOldArticles(article_max_age_days);
 		}
 
 		int last_modified = db.getLastModified();

src/DataBaseWriteAccess.vala

@@ -83,12 +83,12 @@ public class FeedReader.DataBase : DataBaseReadOnly {
 		Settings.state().set_int("last-spring-cleaning", (int)now.to_unix());
 	}
 
-	public void dropOldArticles(int weeks)
+	public void dropOldArticles(int max_age_days)
 	{
 		var query = new QueryBuilder(QueryType.SELECT, "main.articles");
 		query.select_field("articleID");
 		query.select_field("feedID");
-		query.where("datetime(date, 'unixepoch', 'localtime') <= datetime('now', '-%i days')".printf(weeks*7));
+		query.where(@"datetime(date, 'unixepoch', 'localtime') <= datetime('now', '-$(max_age_days) days')");
 		query.where_equal_int("marked", ArticleStatus.UNMARKED.to_int());
 		if(FeedServer.get_default().useMaxArticles())
 		{
@@ -456,6 +456,7 @@ public class FeedReader.DataBase : DataBaseReadOnly {
 		assert (guidHash_position > 0);
 		assert (modified_position > 0);
 
+		DateTime? drop_date = ((DropArticles)Settings.general().get_enum("drop-articles-after")).to_start_date();
 		foreach(var article in articles)
 		{
 			// if article time is in the future
@@ -465,8 +466,7 @@ public class FeedReader.DataBase : DataBaseReadOnly {
 				article.SetDate(now);
 			}
 
-			int? weeks = ((DropArticles)Settings.general().get_enum("drop-articles-after")).to_weeks();
-			if(weeks != null && article.getDate().compare(now.add_weeks(-(int)weeks)) == -1)
+			if(drop_date != null && article.getDate().compare(drop_date) == -1)
 			{
 				Logger.info("Ignoring old article: %s".printf(article.getTitle()));
 				continue;

src/Enums.vala

@@ -177,32 +177,32 @@ namespace FeedReader {
 		ONE_MONTH,
 		SIX_MONTHS;
 
-		public int? to_weeks()
+		public int? to_days()
 		{
 			switch(this)
 			{
-				case NEVER:
+			case NEVER:
 				return null;
-				case ONE_WEEK:
-				return 1;
-				case ONE_MONTH:
-				return 4;
-				case SIX_MONTHS:
-				return 24;
-				default:
+			case ONE_WEEK:
+				return 7;
+			case ONE_MONTH:
+				return 31;
+			case SIX_MONTHS:
+				return 186;
+			default:
 				assert_not_reached();
 			}
 		}
 
 		public DateTime? to_start_date()
 		{
-			int? weeks = to_weeks();
-			if(weeks == null)
+			int? days = to_days();
+			if(days == null)
 			{
 				return null;
 			}
 
-			return new DateTime.now_utc().add_weeks(-(int)weeks);
+			return new DateTime.now_utc().add_days(-(int)days);
 		}
 	}