library cdejecter;
{$mode delphi}
{$codepage UTF8}
uses Interfaces, Classes, LazUTF8Classes, sysutils, cde_types, windows, mmsystem, LazFileUtils, LazUTF8, cde_dir,
     SimplyJSON;
{$R *.res}
function DiskChar2Byte (const ADiskChar: WideChar): Byte;
const ALetters: UTF8String = 'abcdefghijklmnopqrstuvwxyz';
begin
Result:= UTF8Pos(ADiskChar, ALetters);
end;
function FiltreIt (const ADisc: WideChar): Boolean;
var ConfigFile: String;
    SL: TStringListUTF8;
    i: Integer;
begin
Result:= False;
ConfigFile:= GetCDEPath + 'configs\configs.json';
SL:= TStringListUTF8.Create;
SL.Delimiter:= ';';
SL.Sorted:= True;
case JSReadInteger('/filter/type', 0, ConfigFile) of
 0: ;
 1: begin
    SL.DelimitedText:= JSReadString('/filter/whitelist', '', ConfigFile);
    SL.Sort;
    Result:= not (SL.Find(ADisc, i));
    end;
 2: begin
    SL.DelimitedText:= JSReadString('/filter/blacklist', '', ConfigFile);
    SL.Sort;
    Result:= SL.Find(ADisc, i);
    end;
 end;
FreeAndNil(SL);
end;
function GetCDDiscs: PWideChar;
var i, j : Integer;
    Buf : array [0..95] of Char;
    SL: TStringListUTF8;
begin
GetLogicalDriveStrings(96, Buf);
for j:=0 to 25 do
 if Buf[j*4+2] <> #92 then
  Break;
SL:= TStringListUTF8.Create;
for i:=0 to j-1 do
 begin
 if GetDriveType(@Buf[i*4])= DRIVE_CDROM then
  if not FiltreIt(WideChar(AnsiLowerCase(String(Buf[i*4]))[1])) then
   SL.Add(AnsiLowerCase(String(Buf[i*4])) + ':\');
 end;
SL.Delimiter:= ';';
Result:= PWideChar(SL.DelimitedText);
SL.Clear;
SL.Free;
end;
function GetDiscState (const ADisc: WideChar): TDiscState;
var sRec: TSearchRec;
    res: Integer;
begin
Result:= dsNIL;
SetErrorMode(SEM_FAILCRITICALERRORS);
{$I-}
res:= FindFirstUTF8(ADisc + ':\*.*', faAnyfile, SRec);
FindCloseUTF8(SRec);
{$I+}
case res of
 0: Result:= dsNormal;
 2,18: Result:= dsEmpty;
 21,3: Result:= dsNIL;
 else
 Result:= dsUnFormatted;
 end;
end;
function GetVolumeInfo (const ADisc: WideChar): TDiscInfo;
var root: PChar;
    res: LongBool;
    VolumeNameBuffer, FileSystemNameBuffer: PChar;
    VolumeNameSize,FileSystemNameSize: DWORD;
    VolumeSerialNumber, MaximumComponentLength, FileSystemFlags: DWORD;
    s: String;
begin
s:= ADisc + ':\';
root:= PChar(s);
GetMem(VolumeNameBuffer, 256);
Getmem(FileSystemNameBuffer, 256);
VolumeNameSize:= 255;
FileSystemNameSize:= 255;
res:= GetVolumeInformation(Root, VolumeNameBuffer, VolumeNameSize, @VolumeSerialNumber, MaximumComponentLength, FileSystemFlags, FileSystemNameBuffer, FileSystemNameSize);
with Result do
 begin
 diHasInfo:= res;
 diDrive:= ADisc;
 diVolumeName:= VolumeNameBuffer;
 diFileSystem:= FileSystemNameBuffer;
 diSerial:= VolumeSerialNumber;
 diDiscSize:= DiskSize(DiskChar2Byte(ADisc));
 diDiscFree:= DiskFree(DiskChar2Byte(ADisc));
 end;
Freemem(VolumeNameBuffer, 256);
Freemem(FileSystemNameBuffer, 256);
end;
function EjectCD (const ADisc: WideChar): Boolean;
var Res: MciError;
    OpenParm: TMCI_Open_Parms;
    Flags: DWord;
    S: String;
    DeviceID: Word;
begin
Result:= False;
if ADisc = '' then
 Abort;
S:= ADisc + ':';
if (GetDriveType(PChar(S)) = DRIVE_CDROM) then
 begin
 Flags:= mci_Open_Type or mci_Open_Element;
 with OpenParm do
  begin
  dwCallback:= 0;
  lpstrDeviceType:= 'CDAudio';
  lpstrElementName:= PChar(S);
  end;
 Res:= mciSendCommand(0, mci_Open, Flags, Longint(@OpenParm));
 if Res <> 0 then
  Exit;
 DeviceID:= OpenParm.wDeviceID;
 try
  Res:= mciSendCommand(DeviceID, MCI_SET, MCI_SET_DOOR_OPEN, 0);
 finally
  mciSendCommand(DeviceID, mci_Close, Flags, Longint(@OpenParm));
  end;
 end;
Result:= (GetDiscState(ADisc) = dsNIL);
end;
function CloseCD (const ADisc: WideChar): Boolean;
var Res: MciError;
    OpenParm: TMCI_Open_Parms;
    Flags: DWord;
    S: String;
    DeviceID: Word;
begin
Result:= False;
if ADisc = '' then
 Abort;
S:= ADisc + ':';
if (GetDriveType(PChar(S)) = DRIVE_CDROM) {and (GetDiscState(ADisc) <> dsNIL)} then
 begin
 Flags:= mci_Open_Type or mci_Open_Element;
 with OpenParm do
  begin
  dwCallback:= 0;
  lpstrDeviceType:= 'CDAudio';
  lpstrElementName:= PChar(S);
  end;
 Res:= mciSendCommand(0, mci_Open, Flags, Longint(@OpenParm));
 if Res <> 0 then
  Exit;
 DeviceID:= OpenParm.wDeviceID;
 try
  Res:= mciSendCommand(DeviceID, MCI_SET, MCI_SET_DOOR_CLOSED, 0);
  Result:= True;
 finally
  mciSendCommand(DeviceID, mci_Close, Flags, Longint(@OpenParm));
  end;
 end;
end;
exports GetCDDiscs, GetDiscState, GetVolumeInfo, EjectCD, CloseCD;
begin
end.