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Field possible database changes

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The current format of the database is good for small amounts of data. The truth is that the hashes and sizes of the files are what really determine if a file is different or not. After chatting with Obiwantje about this, I'm beginning some code tests with a hash-centric database model, instead of the game/rom centric. This means that each hash can have mutliple roms attached to it, similarly a given game can have multiple sources or systems attached. It's a much cleaner system, but demands a total rewrite and new databae structure.
This commit is contained in:
Matt Nadareski
2016-04-21 23:46:14 -07:00
parent e0b0071847
commit dbbf297263
2 changed files with 153 additions and 0 deletions
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94
DATabase/Import.cs
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@@ -429,6 +429,7 @@ namespace SabreTools
/// <param name="sysid">System ID for the game to be added with</param>
/// <param name="machinename">Name of the game to be added</param>
/// <param name="srcid">Source ID for the game to be added with</param>
/// <param name="dbc">SQLite database connection to use</param>
/// <returns>Game ID of the inserted (or found) game, -1 on error</returns>
private long AddGame(int sysid, string machinename, int srcid, SqliteConnection dbc)
{
@@ -488,6 +489,7 @@ namespace SabreTools
/// <param name="rom">RomData object representing the rom</param>
/// <param name="gameid">ID of the parent game to be mapped to</param>
/// <param name="date">Last updated date</param>
/// <param name="dbc">SQLite database connection to use</param>
/// <returns>True if the file exists or could be added, false on error</returns>
private bool AddRom(RomData rom, long gameid, string date, SqliteConnection dbc)
{
@@ -547,5 +549,97 @@ COMMIT;";
return true;
}
/// <summary>
/// Add a hash to the database if it doesn't exist already
/// </summary>
/// <param name="rom">RomData object representing the rom</param>
/// <param name="sysid">System ID for the game to be added with</param>
/// <param name="srcid">Source ID for the game to be added with</param>
/// <param name="date">Last updated date</param>
/// <param name="dbc">SQLite database connection to use</param>
/// <returns>True if the hash exists or could be added, false on error</returns>
/// <remarks>This is currently unused. It is a test method for the new SabreTools DB schema</remarks>
private bool AddHash(RomData rom, int sysid, int srcid, string date, SqliteConnection dbc)
{
// Process the game name
// WoD gets rid of anything past the first "(" or "[" as the name, we will do the same
string stripPattern = @"(([[(].*[\)\]] )?([^([]+))";
Regex stripRegex = new Regex(stripPattern);
Match stripMatch = stripRegex.Match(rom.Game);
rom.Game = stripMatch.Groups[1].Value;
// Run the name through the filters to make sure that it's correct
rom.Game = Style.NormalizeChars(rom.Game);
rom.Game = Style.RussianToLatin(rom.Game);
rom.Game = Style.SearchPattern(rom.Game);
rom.Game = rom.Game.Trim();
// Process the rom name
// WOD origninally stripped out any subdirs from the imported files, we do the same
rom.Name = Path.GetFileName(rom.Name);
// Run the name through the filters to make sure that it's correct
rom.Name = Style.NormalizeChars(rom.Name);
rom.Name = Style.RussianToLatin(rom.Name);
rom.Name = Regex.Replace(rom.Name, @"(.*) \.(.*)", "$1.$2");
// Retrieve or insert the hash
long hashid = -1;
string query = "SELECT id FROM hash WHERE size=" + rom.Size + " AND crc='" + rom.CRC + "' AND md5='" + rom.MD5 + "' AND sha1='" + rom.SHA1 + "'";
using (SqliteCommand slc = new SqliteCommand(query, dbc))
{
using (SqliteDataReader sldr = slc.ExecuteReader())
{
// If nothing is found, add the hash and get the insert ID
if (!sldr.HasRows)
{
query = "INSERT INTO hash (size, crc, md5, sha1)" +
" VALUES (" + rom.Size + ", '" + rom.CRC + "', '" + rom.MD5 + "', '" + rom.SHA1 + "')";
using (SqliteCommand slc2 = new SqliteCommand(query, dbc))
{
slc2.ExecuteNonQuery();
}
query = "SELECT last_insert_rowid()";
using (SqliteCommand slc2 = new SqliteCommand(query, dbc))
{
hashid = (long)slc2.ExecuteScalar();
}
}
// Otherwise, retrieve the ID
else
{
sldr.Read();
hashid = sldr.GetInt64(0);
}
}
}
// Ignore or insert the file and game
query = @"BEGIN;
INSERT OR IGNORE INTO hashdata (hashid, key, value) VALUES " +
"(" + hashid + ", 'name', '" + rom.Name + "'), " +
"(" + hashid + ", 'game', '" + rom.Game + "'), " +
"(" + hashid + ", 'lastupdated', '" + date + @"');
INSERT OR IGNORE INTO gamesystem (game, systemid) VALUES ('" + rom.Game + "', " + sysid + @");
INSERT OR IGNORE INTO gamesource (game, sourceid) VALUES ('" + rom.Game + "', " + srcid + @");
COMMIT;";
using (SqliteCommand slc = new SqliteCommand(query, dbc))
{
int ret = slc.ExecuteNonQuery();
if ((SQLiteErrorCode)ret != SQLiteErrorCode.Done && (SQLiteErrorCode)ret != SQLiteErrorCode.Ok)
{
_logger.Error("A SQLite error has occurred: " + ((SQLiteErrorCode)ret).ToString());
return false;
}
}
return true;
}
}
}