Some Changes on Database System and Header Reader

Fixed Bug: Scores with 0 are added to DB
Made a Class instead of many Functions
Fixed a Bug in UFiles, not reading Gap from Header correctly

git-svn-id: svn://svn.code.sf.net/p/ultrastardx/svn/trunk@20 b956fd51-792f-4845-bead-9b4dfca2ff2c

1 files changed, 163 insertions, 0 deletions

diff --git a/Game/Code/Classes/UDataBase.pas b/Game/Code/Classes/UDataBase.pas
new file mode 100644
index 00000000..1ebc18db
--- /dev/null
+++ b/Game/Code/Classes/UDataBase.pas
@@ -0,0 +1,163 @@
+unit UDataBase;

+

+interface

+

+uses USongs, SQLiteTable3;

+

+//--------------------

+//DataBaseSystem - Class including all DB Methods

+//--------------------

+type

+  TDataBaseSystem = class

+    private

+      ScoreDB: TSqliteDatabase;

+      sFilename: string;

+    public

+

+

+    Destructor Free;

+

+    Procedure Init(const Filename: string);

+    procedure ReadScore(var Song: TSong);

+    procedure AddScore(var Song: TSong; Level: integer; Name: string; Score: integer);

+    procedure WriteScore(var Song: TSong);

+  end;

+

+var

+  DataBase: TDataBaseSystem;

+

+implementation

+

+uses IniFiles, SysUtils;

+

+//--------------------

+//Create - Opens Database and Create Tables if not Exist

+//--------------------

+

+Procedure TDataBaseSystem.Init(const Filename: string);

+begin

+  //Open Database

+  ScoreDB := TSqliteDatabase.Create(Filename);

+  sFilename := Filename;

+

+  try

+  //Look for Tables => When not exist Create them

+  if not ScoreDB.TableExists('US_Scores') then

+    ScoreDB.execsql('CREATE TABLE `US_Scores` (`SongID` INT( 11 ) NOT NULL , `Difficulty` INT( 1 ) NOT NULL , `Player` VARCHAR( 150 ) NOT NULL , `Score` INT( 5 ) NOT NULL );');

+

+  if not ScoreDB.TableExists('US_Songs') then

+    ScoreDB.execsql('CREATE TABLE `US_Songs` (`ID` INTEGER PRIMARY KEY, `Artist` VARCHAR( 255 ) NOT NULL , `Title` VARCHAR( 255 ) NOT NULL , `TimesPlayed` int(5) NOT NULL );');

+   //Not possible because of String Limitation to 255 Chars //Need to rewrite Wrapper 

+  {if not ScoreDB.TableExists('US_SongCache') then

+    ScoreDB.ExecSQL('CREATE TABLE `US_SongCache` (`Path` VARCHAR( 255 ) NOT NULL , `Filename` VARCHAR( 255 ) NOT NULL , `Title` VARCHAR( 255 ) NOT NULL , `Artist` VARCHAR( 255 ) NOT NULL , `Folder` VARCHAR( 255 ) NOT NULL , `Genre` VARCHAR( 255 ) NOT NULL , `Edition` VARCHAR( 255 ) NOT NULL , `Language` VARCHAR( 255 ) NOT NULL , `Creator` VARCHAR( 255 ) NOT NULL , `Cover` VARCHAR( 255 ) NOT NULL , `Background` VARCHAR( 255 ) NOT NULL , `Video` VARCHAR( 255 ) NOT NULL , `VideoGap` FLOAT NOT NULL , `Gap` FLOAT NOT NULL , `Start` FLOAT NOT NULL , `Finish` INT( 11 ) NOT NULL , `BPM` INT( 5 ) NOT NULL , `Relative` BOOLEAN NOT NULL , `NotesGap` INT( 11 ) NOT NULL);');}

+

+

+  finally

+  //ScoreDB.Free;

+  end;

+

+end;

+

+//--------------------

+//Free - Frees Database

+//--------------------

+Destructor TDataBaseSystem.Free;

+begin

+  ScoreDB.Free;

+end;

+

+//--------------------

+//ReadScore - Read Scores into SongArray

+//--------------------

+procedure TDataBaseSystem.ReadScore(var Song: TSong);

+var

+  TableData: TSqliteTable;

+  Dif: Byte;

+begin

+  //ScoreDB := TSqliteDatabase.Create(sFilename);

+  try

+  try

+  //Search Song in DB

+  TableData := ScoreDB.GetTable('SELECT `Difficulty`, `Player`, `Score` FROM `us_scores` WHERE `SongID` = (SELECT `ID` FROM `us_songs` WHERE `Artist` = "' + Song.Artist + '" AND `Title` = "' + Song.Title + '" LIMIT 1) ORDER BY `Score` DESC  LIMIT 15');

+  //Empty Old Scores

+  SetLength (Song.Score[0], 0);

+  SetLength (Song.Score[1], 0);

+  SetLength (Song.Score[2], 0);

+

+  while not TableData.Eof do//Go through all Entrys

+  begin//Add one Entry to Array

+    Dif := StrtoInt(TableData.FieldAsString(TableData.FieldIndex['Difficulty']));

+    if (Dif>=0) AND (Dif<=2) then

+    begin

+      SetLength(Song.Score[Dif], Length(Song.Score[Dif]) + 1);

+

+      Song.Score[Dif, high(Song.Score[Dif])].Name := TableData.FieldAsString(TableData.FieldIndex['Player']);

+      Song.Score[Dif, high(Song.Score[Dif])].Score:= StrtoInt(TableData.FieldAsString(TableData.FieldIndex['Score']));

+    end;

+    TableData.Next;

+  end;

+

+  except //Im Fehlerfall

+  for Dif := 0 to 2 do

+  begin

+  SetLength(Song.Score[Dif], 1);

+  Song.Score[Dif, 1].Name := 'Error Reading ScoreDB';

+  end;

+  end;

+  finally

+  //ScoreDb.Free;

+  end;

+end;

+

+//--------------------

+//AddScore - Add one new Score to DB

+//--------------------

+procedure TDataBaseSystem.AddScore(var Song: TSong; Level: integer; Name: string; Score: integer);

+var

+ID: Integer;

+TableData: TSqliteTable;

+begin

+  //ScoreDB := TSqliteDatabase.Create(sFilename);

+  try

+  //Prevent 0 Scores from being added

+  if (Score > 0) then

+  begin

+

+    ID := ScoreDB.GetTableValue('SELECT `ID` FROM `US_Songs` WHERE `Artist` = "' + Song.Artist + '" AND `Title` = "' + Song.Title + '"');

+    if ID = 0 then //Song doesn't exist -> Create

+    begin

+      ScoreDB.ExecSQL ('INSERT INTO `US_Songs` ( `ID` , `Artist` , `Title` , `TimesPlayed` ) VALUES (NULL , "' + Song.Artist + '", "' + Song.Title + '", "0");');

+      ID := ScoreDB.GetTableValue('SELECT `ID` FROM `US_Songs` WHERE `Artist` = "' + Song.Artist + '" AND `Title` = "' + Song.Title + '"');

+      if ID = 0 then //Could not Create Table

+        exit;

+    end;

+    //Create new Entry

+    ScoreDB.ExecSQL('INSERT INTO `US_Scores` ( `SongID` , `Difficulty` , `Player` , `Score` ) VALUES ("' + InttoStr(ID) + '", "' + InttoStr(Level) + '", "' + Name + '", "' + InttoStr(Score) + '");');

+

+    //Delete Last Position when there are more than 5 Entrys

+    if ScoreDB.GetTableValue('SELECT COUNT(`SongID`) FROM `US_Scores` WHERE `SongID` = "' + InttoStr(ID) + '" AND `Difficulty` = "' + InttoStr(Level) +'"') > 5 then

+    begin

+      TableData := ScoreDB.GetTable('SELECT `Player`, `Score` FROM `US_Scores` WHERE SongID = "' + InttoStr(ID) + '" AND `Difficulty` = "' + InttoStr(Level) +'" ORDER BY `Score` ASC LIMIT 1');

+      ScoreDB.ExecSQL('DELETE FROM `US_Scores` WHERE SongID = "' + InttoStr(ID) + '" AND `Difficulty` = "' + InttoStr(Level) +'" AND `Player` = "' + TableData.FieldAsString(TableData.FieldIndex['Player']) + '" AND `Score` = "' + TableData.FieldAsString(TableData.FieldIndex['Score']) + '"');

+    end;

+

+  end;

+  finally

+  //ScoreDB.Free;

+  end;

+end;

+

+//--------------------

+//WriteScore - Not needed with new System; But used for Increment Played Count

+//--------------------

+procedure TDataBaseSystem.WriteScore(var Song: TSong);

+begin

+  try

+    //Increase TimesPlayed

+    ScoreDB.ExecSQL ('UPDATE `us_songs` SET `TimesPlayed` = `TimesPlayed` + "1" WHERE `Title` = "' + Song.Title + '" AND `Artist` = "' + Song.Artist + '";');

+  except

+

+  end;

+end;

+

+end.