Add initial support for Journey mode in SSC.

TShockAPI/DB/ResearchDatastore.cs

@@ -0,0 +1,123 @@
+using MySql.Data.MySqlClient;
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Terraria;
+using Terraria.ID;
+
+namespace TShockAPI.DB
+{
+	/// <summary>
+	/// This class is used as the data interface for Journey mode research.
+	/// This information is maintained such that SSC characters will be properly set up with
+	/// the world's current research.
+	/// </summary>
+	public class ResearchDatastore
+	{
+		private IDbConnection database;
+
+		/// <summary>
+		/// In-memory cache of what items have been sacrificed.
+		/// The first call to GetSacrificedItems will load this with data from the database.
+		/// </summary>
+		private Dictionary<int, int> _itemsSacrificed;
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="TShockAPI.DB.ResearchDatastore"/> class.
+		/// </summary>
+		/// <param name="db">A valid connection to the TShock database</param>
+		public ResearchDatastore(IDbConnection db)
+		{
+			database = db;
+
+			var table = new SqlTable("Research",
+									new SqlColumn("WorldId", MySqlDbType.Int32),
+									new SqlColumn("PlayerId", MySqlDbType.Int32),
+									new SqlColumn("ItemId", MySqlDbType.Int32),
+									new SqlColumn("AmountSacrificed", MySqlDbType.Int32),
+									new SqlColumn("TimeSacrificed", MySqlDbType.DateTime)
+				);
+			var creator = new SqlTableCreator(db,
+				db.GetSqlType() == SqlType.Sqlite
+					? (IQueryBuilder)new SqliteQueryCreator()
+					: new MysqlQueryCreator());
+			try
+			{
+				creator.EnsureTableStructure(table);
+			}
+			catch (DllNotFoundException)
+			{
+				System.Console.WriteLine("Possible problem with your database - is Sqlite3.dll present?");
+				throw new Exception("Could not find a database library (probably Sqlite3.dll)");
+			}
+		}
+
+		/// <summary>
+		/// This call will return the memory-cached list of items sacrificed.
+		/// If the cache is not initialized, it will be initialized from the database.
+		/// </summary>
+		/// <returns></returns>
+		public Dictionary<int, int> GetSacrificedItems()
+		{
+			if (_itemsSacrificed == null)
+			{
+				_itemsSacrificed = ReadFromDatabase();
+			}
+
+			return _itemsSacrificed;
+		}
+
+		/// <summary>
+		/// This function will return a Dictionary&lt;ItemId, AmountSacrificed&gt; representing
+		/// what the progress of research on items is for this world.
+		/// </summary>
+		/// <returns>A dictionary of ItemID keys and Amount Sacrificed values.</returns>
+		private Dictionary<int, int> ReadFromDatabase()
+		{
+			Dictionary<int, int> sacrificedItems = new Dictionary<int, int>();
+
+			var sql = @"select itemId, sum(AmountSacrificed) totalSacrificed
+  from Research
+	where WorldId = @0
+      group by itemId";
+
+			using (var reader = database.QueryReader(sql, Main.worldID))
+			{
+				while (reader.Read())
+				{
+					var itemId = reader.Get<Int32>("itemId");
+					var amount = reader.Get<Int32>("totalSacrificed");
+					sacrificedItems[itemId] = amount;
+				}
+			}
+
+			return sacrificedItems;
+		}
+
+		/// <summary>
+		/// This method will sacrifice an amount of an item for research.
+		/// </summary>
+		/// <param name="itemId">The net ItemId that is being researched.</param>
+		/// <param name="amount">The amount of items being sacrificed.</param>
+		/// <param name="player">The player who sacrificed the item for research.</param>
+		/// <returns>The cumulative total sacrifices for this item.</returns>
+		public int SacrificeItem(int itemId, int amount, TSPlayer player)
+		{
+			var itemsSacrificed = GetSacrificedItems();
+			if (!(itemsSacrificed.ContainsKey(itemId)))
+				itemsSacrificed[itemId] = 0;
+
+			var sql = @"insert into Research (WorldId, PlayerId, ItemId, AmountSacrificed, TimeSacrificed) values (@0, @1, @2, @3, @4)";
+			var result = database.Query(sql, Main.worldID, player.Account.ID, itemId, amount, DateTime.Now);
+			if (result == 1)
+			{
+				itemsSacrificed[itemId] += amount;
+			}
+
+			return itemsSacrificed[itemId];
+		}
+	}
+}