1 files changed, 363 insertions, 0 deletions
diff --git a/Game/Code/Classes/UDataBase.pas b/Game/Code/Classes/UDataBase.pas
new file mode 100644
index 00000000..b5636d52
--- /dev/null
+++ b/Game/Code/Classes/UDataBase.pas
@@ -0,0 +1,363 @@
+unit UDataBase;
+
+interface
+
+{$IFDEF FPC}
+  {$MODE Delphi}
+{$ENDIF}
+
+{$I switches.inc}
+
+uses USongs,
+     USong,
+     SQLiteTable3;
+
+//--------------------
+//DataBaseSystem - Class including all DB Methods
+//--------------------
+type
+  TStatResult = record
+    Case Typ: Byte of
+      0: (Singer:     ShortString;
+          Score:      Word;
+          Difficulty: Byte;
+          SongArtist: ShortString;
+          SongTitle:  ShortString);
+
+      1: (Player:     ShortString;
+          AverageScore: Word);
+
+      2: (Artist: ShortString;
+          Title:  ShortString;
+          TimesSung:  Word);
+
+      3: (ArtistName:   ShortString;
+          TimesSungtot: Word);
+  end;
+  AStatResult = Array of TStatResult;
+  
+  TDataBaseSystem = class
+    private
+      ScoreDB: TSqliteDatabase;
+      sFilename: string;
+      
+    public
+
+
+    property Filename: String read sFilename;
+    
+    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);
+
+    Function  GetStats(var Stats: AStatResult; const Typ, Count: Byte; const Page: Cardinal; const Reversed: Boolean): Boolean;
+    Function  GetTotalEntrys(const Typ: Byte): Cardinal;
+  end;
+
+var
+  DataBase: TDataBaseSystem;
+
+implementation
+
+uses IniFiles, SysUtils;
+
+const
+  cUS_Scores = 'us_scores';
+  cUS_Songs  = 'us_songs';
+
+//--------------------
+//Create - Opens Database and Create Tables if not Exist
+//--------------------
+
+Procedure TDataBaseSystem.Init(const Filename: string);
+begin
+  writeln( 'TDataBaseSystem.Init' );
+  
+  //Open Database
+  ScoreDB   := TSqliteDatabase.Create( Filename );
+  sFilename := Filename;
+
+  try
+    //Look for Tables => When not exist Create them
+    if not ScoreDB.TableExists( cUS_Scores ) then
+    begin
+      ScoreDB.execsql('CREATE TABLE `'+cUS_Scores+'` (`SongID` INT( 11 ) NOT NULL , `Difficulty` INT( 1 ) NOT NULL , `Player` VARCHAR( 150 ) NOT NULL , `Score` INT( 5 ) NOT NULL );');
+      writeln( 'TDataBaseSystem.Init - CREATED US_Scores' );
+    end;
+
+    if not ScoreDB.TableExists( cUS_Songs ) then
+    begin
+      ScoreDB.execsql('CREATE TABLE `'+cUS_Songs+'` (`ID` INTEGER PRIMARY KEY, `Artist` VARCHAR( 255 ) NOT NULL , `Title` VARCHAR( 255 ) NOT NULL , `TimesPlayed` int(5) NOT NULL );');
+      writeln( 'TDataBaseSystem.Init - CREATED US_Songs' );
+    end;
+    
+     //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
+    writeln( cUS_Songs +' Exist : ' + inttostr( integer(ScoreDB.TableExists( cUS_Songs )) ) );
+    writeln( cUS_Scores +' Exist : ' + inttostr( integer(ScoreDB.TableExists( cUS_Scores )) ) );
+  //ScoreDB.Free;
+  end;
+
+end;
+
+//--------------------
+//Free - Frees Database
+//--------------------
+Destructor TDataBaseSystem.Free;
+begin
+  writeln( 'TDataBaseSystem.Free' );
+
+  freeandnil( ScoreDB );
+end;
+
+//--------------------
+//ReadScore - Read Scores into SongArray
+//--------------------
+procedure TDataBaseSystem.ReadScore(var Song: TSong);
+var
+  TableData: TSqliteTable;
+  Dif: Byte;
+begin
+  if not assigned( ScoreDB ) then
+    exit;
+
+
+  //ScoreDB := TSqliteDatabase.Create(sFilename);
+  try
+    try
+    //Search Song in DB
+    TableData := ScoreDB.GetTable('SELECT `Difficulty`, `Player`, `Score` FROM `'+cUS_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; // While not TableData.EOF
+
+    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 // Try 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
+  if not assigned( ScoreDB ) then
+    exit;
+
+  //ScoreDB := TSqliteDatabase.Create(sFilename);
+  try
+  //Prevent 0 Scores from being added
+  if (Score > 0) then
+  begin
+
+    ID := ScoreDB.GetTableValue('SELECT `ID` FROM `'+cUS_Songs+'` WHERE `Artist` = "' + Song.Artist + '" AND `Title` = "' + Song.Title + '"');
+    if ID = 0 then //Song doesn't exist -> Create
+    begin
+      ScoreDB.ExecSQL ('INSERT INTO `'+cUS_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 `'+cUS_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 `'+cUS_Scores+'` WHERE `SongID` = "' + InttoStr(ID) + '" AND `Difficulty` = "' + InttoStr(Level) +'"') > 5 then
+    begin
+      TableData := ScoreDB.GetTable('SELECT `Player`, `Score` FROM `'+cUS_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
+  if not assigned( ScoreDB ) then
+    exit;
+    
+  try
+    //Increase TimesPlayed
+    ScoreDB.ExecSQL ('UPDATE `'+cUS_Songs+'` SET `TimesPlayed` = `TimesPlayed` + "1" WHERE `Title` = "' + Song.Title + '" AND `Artist` = "' + Song.Artist + '";');
+  except
+
+  end;
+end;
+
+//--------------------
+//GetStats - Write some Stats to Array, Returns True if Chossen Page has Entrys
+//Case Typ of
+//0 - Best Scores
+//1 - Best Singers
+//2 - Most sung Songs
+//3 - Most popular Band
+//--------------------
+Function TDataBaseSystem.GetStats(var Stats: AStatResult; const Typ, Count: Byte; const Page: Cardinal; const Reversed: Boolean): Boolean;
+var
+  Query: String;
+  TableData: TSqliteTable;
+begin
+  Result := False;
+
+  if not assigned( ScoreDB ) then
+    exit;
+
+  if (Length(Stats) < Count) then
+    Exit;
+
+  {Todo:  Add Prevention that only Players with more than 5 Scores are Selected at Typ 2}
+
+  //Create Query
+  Case Typ of
+    0: Query := 'SELECT `Player` , `Difficulty` , `Score` , `Artist` , `Title` FROM `'+cUS_Scores+'` INNER JOIN `US_Songs` ON (`SongID` = `ID`) ORDER BY `Score`';
+    1: Query := 'SELECT `Player` , ROUND (Sum(`Score`) / COUNT(`Score`)) FROM `'+cUS_Scores+'` GROUP BY `Player` ORDER BY (Sum(`Score`) / COUNT(`Score`))';
+    2: Query := 'SELECT `Artist` , `Title` , `TimesPlayed` FROM `'+cUS_Scores+'` ORDER BY `TimesPlayed`';
+    3: Query := 'SELECT `Artist` , Sum(`TimesPlayed`) FROM `'+cUS_Scores+'` GROUP BY `Artist` ORDER BY Sum(`TimesPlayed`)';
+  end;
+
+  //Add Order Direction
+  If Reversed then
+    Query := Query + ' ASC'
+  else
+    Query := Query + ' DESC';
+
+  //Add Limit
+  Query := Query + ' LIMIT ' + InttoStr(Count * Page) + ', ' + InttoStr(Count) + ';';
+
+  //Execute Query
+  //try
+    TableData := ScoreDB.GetTable(Query);
+  {except
+    exit;
+  end;}
+
+  //if Result empty -> Exit
+  if (TableData.RowCount < 1) then
+    exit;
+
+  //Copy Result to Stats Array
+  while not TableData.Eof do
+  begin
+    Stats[TableData.Row].Typ := Typ;
+
+    Case Typ of
+      0:begin
+          Stats[TableData.Row].Singer := TableData.Fields[0];
+
+          Stats[TableData.Row].Difficulty := StrtoIntDef(TableData.Fields[1], 0);
+
+          Stats[TableData.Row].Score := StrtoIntDef(TableData.Fields[2], 0){TableData.FieldAsInteger(2)};
+          Stats[TableData.Row].SongArtist := TableData.Fields[3];
+          Stats[TableData.Row].SongTitle := TableData.Fields[4];
+        end;
+
+        1:begin
+          Stats[TableData.Row].Player := TableData.Fields[0];
+          Stats[TableData.Row].AverageScore := StrtoIntDef(TableData.Fields[1], 0);
+        end;
+
+        2:begin
+          Stats[TableData.Row].Artist := TableData.Fields[0];
+          Stats[TableData.Row].Title  := TableData.Fields[1];
+          Stats[TableData.Row].TimesSung  := StrtoIntDef(TableData.Fields[2], 0);
+        end;
+
+        3:begin
+          Stats[TableData.Row].ArtistName := TableData.Fields[0];
+          Stats[TableData.Row].TimesSungtot := StrtoIntDef(TableData.Fields[1], 0);
+        end;
+
+    end;
+
+    TableData.Next;
+  end;
+
+  Result := True;
+end;
+
+//--------------------
+//GetTotalEntrys - Get Total Num of entrys for a Stats Query
+//--------------------
+Function  TDataBaseSystem.GetTotalEntrys(const Typ: Byte): Cardinal;
+var Query: String;
+begin
+  if not assigned( ScoreDB ) then
+    exit;
+  try
+    //Create Query
+    Case Typ of
+      0: begin
+           Query := 'SELECT COUNT(`SongID`) FROM `'+cUS_Scores+'`;';
+           if not ScoreDB.TableExists( cUS_Scores ) then
+             exit;
+         end;
+      1: begin
+           Query := 'SELECT COUNT(DISTINCT `Player`) FROM `'+cUS_Scores+'`;';
+           if not ScoreDB.TableExists( cUS_Scores ) then
+             exit;
+         end;
+      2: begin
+           Query := 'SELECT COUNT(`ID`) FROM `'+cUS_Scores+'`;';
+           if not ScoreDB.TableExists( cUS_Songs ) then
+             exit;
+         end;
+      3: begin
+           Query := 'SELECT COUNT(DISTINCT `Artist`) FROM `'+cUS_Songs+'`;';
+           if not ScoreDB.TableExists( cUS_Songs ) then
+             exit;
+         end;
+    end;
+  
+    Result := ScoreDB.GetTableValue(Query);
+  except
+    // TODO : JB_Linux - Why do we get these exceptions on linux !!
+    on E:ESQLiteException DO  // used to handle : Could not retrieve data "SELECT COUNT(`ID`) FROM `US_Songs`;" : SQL logic error or missing database
+                              // however, we should pre-empt this error... and make sure the database DOES exist.
+    begin
+      result := 0;
+    end;
+  end;
+
+end;
+
+end.