Auto-delete logs finished + custom App-to-VPN messages

main/DB/DBCommon.swift

@@ -39,9 +39,21 @@ extension SQLiteDatabase {
 	/// `INSERT INTO cache (dns, opt) VALUES (?, ?);`
 	func logWrite(_ domain: String, blocked: Bool = false) throws {
 		try self.run(sql: "INSERT INTO cache (dns, opt) VALUES (?, ?);",
-			bind: [BindText(domain), BindInt32(blocked ? 1 : 0)])
+					 bind: [BindText(domain), BindInt32(blocked ? 1 : 0)])
 		{ try ifStep($0, SQLITE_DONE) }
 	}
+	
+	/// `DELETE FROM cache WHERE ts < (now - ? days);`
+	/// - Parameter days: if `0` or negative, this function does nothing.
+	/// - Returns: `true` if at least one row was deleted.
+	@discardableResult func dnsLogsDeleteOlderThan(days: Int) throws -> Bool {
+		guard days > 0 else { return false }
+		return try self.run(sql: "DELETE FROM cache WHERE ts < strftime('%s', 'now', ?);",
+							bind: [BindText("-\(days) days")]) {
+			try ifStep($0, SQLITE_DONE)
+			return numberOfChanges > 0
+		}
+	}
 }
 
 

main/DB/TheGreatDestroyer.swift

@@ -15,7 +15,7 @@ struct TheGreatDestroyer {
 		}
 	}
 	
-	/// Fired when user taps on Settings -> Delete All Logs
+	/// Fired when user taps on Settings -> "Delete All Logs"
 	static func deleteAllLogs() {
 		sync.pause()
 		DispatchQueue.global().async {
@@ -26,4 +26,18 @@ struct TheGreatDestroyer {
 			} catch {}
 		}
 	}
+	
+	/// Fired when user changes Settings -> "Auto-delete logs" and every time the App enters foreground
+	static func deleteLogs(olderThan days: Int) {
+		guard days > 0 else { return }
+		sync.pause()
+		DispatchQueue.global().async {
+			defer { sync.continue() }
+			QLog.Info("Auto-delete logs")
+			guard let success = try? AppDB?.dnsLogsDeleteOlderThan(days: days), success else {
+				return // nothing changed
+			}
+			sync.needsReloadDB()
+		}
+	}
 }