103 lines
3.4 KiB
C#
103 lines
3.4 KiB
C#
/*
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TShock, a server mod for Terraria
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Copyright (C) 2011-2025 Pryaxis & TShock Contributors
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using MySql.Data.MySqlClient;
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namespace TShockAPI.DB.Queries;
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/// <summary>
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/// Query Creator for Sqlite
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/// </summary>
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public class SqliteQueryBuilder : GenericQueryBuilder, IQueryBuilder
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{
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/// <summary>
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/// Creates a table from a SqlTable object.
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/// </summary>
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/// <param name="table">The SqlTable to create the table from</param>
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/// <returns>The sql query for the table creation.</returns>
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public override string CreateTable(SqlTable table)
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{
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ValidateSqlColumnType(table.Columns);
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var columns =
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table.Columns.Select(
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c =>
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"'{0}' {1} {2} {3} {4} {5}".SFormat(c.Name,
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DbTypeToString(c.Type, c.Length),
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c.Primary ? "PRIMARY KEY" : "",
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c.AutoIncrement ? "AUTOINCREMENT" : "",
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c.NotNull ? "NOT NULL" : "",
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c.DefaultCurrentTimestamp ? "DEFAULT CURRENT_TIMESTAMP" : ""));
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var uniques = table.Columns.Where(c => c.Unique).Select(c => c.Name);
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return "CREATE TABLE {0} ({1} {2})".SFormat(EscapeTableName(table.Name),
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string.Join(", ", columns),
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uniques.Any() ? ", UNIQUE({0})".SFormat(string.Join(", ", uniques)) : "");
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}
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/// <summary>
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/// Renames the given table.
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/// </summary>
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/// <param name="from">Old name of the table</param>
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/// <param name="to">New name of the table</param>
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/// <returns>The sql query for renaming the table.</returns>
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public override string RenameTable(string from, string to)
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{
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return "ALTER TABLE {0} RENAME TO {1}".SFormat(from, to);
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}
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private static readonly Dictionary<MySqlDbType, string> TypesAsStrings = new Dictionary<MySqlDbType, string>
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{
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{ MySqlDbType.VarChar, "TEXT" },
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{ MySqlDbType.String, "TEXT" },
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{ MySqlDbType.Text, "TEXT" },
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{ MySqlDbType.TinyText, "TEXT" },
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{ MySqlDbType.MediumText, "TEXT" },
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{ MySqlDbType.LongText, "TEXT" },
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{ MySqlDbType.Float, "REAL" },
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{ MySqlDbType.Double, "REAL" },
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{ MySqlDbType.Int32, "INTEGER" },
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{ MySqlDbType.Blob, "BLOB" },
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{ MySqlDbType.Int64, "BIGINT"},
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{ MySqlDbType.DateTime, "DATETIME"},
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};
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/// <summary>
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/// Converts the MySqlDbType enum to it's string representation.
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/// </summary>
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/// <param name="type">The MySqlDbType type</param>
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/// <param name="length">The length of the datatype</param>
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/// <returns>The string representation</returns>
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public override string DbTypeToString(MySqlDbType type, int? length)
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{
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if (TypesAsStrings.TryGetValue(type, out string ret))
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{
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return ret;
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}
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throw new NotImplementedException(Enum.GetName(type));
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}
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/// <summary>
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/// Escapes the table name
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/// </summary>
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/// <param name="table">The name of the table to be escaped</param>
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/// <returns></returns>
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protected override string EscapeTableName(string table) => $"\'{table}\'";
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}
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