{
 /***************************************************************************
                            pkgmanager.pas
                            --------------


 ***************************************************************************/

 ***************************************************************************
 *                                                                         *
 *   This source is free software; you can redistribute it and/or modify   *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
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 *   WITHOUT ANY WARRANTY; without even the implied warranty of            *
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 *   General Public License for more details.                              *
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 *                                                                         *
 ***************************************************************************

  Author: Mattias Gaertner

  Abstract:
    Dialog showing the package links of the IDE package systems.
}
unit PkgLinksDlg;

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils, AVL_Tree,
  // LCL
  Forms, Controls, StdCtrls, Buttons, Grids, ExtCtrls, ComCtrls, Menus, Dialogs,
  // Codetools
  FileProcs,
  // LazUtils
  LazUTF8, LazFileUtils, LazFileCache,
  // IdeIntf
  IdeIntfStrConsts, PackageLinkIntf, PackageIntf, IDEDialogs,
  // IDE
  LazarusIDEStrConsts, PackageLinks, LPKCache;

type

  { TPkgLinkInfo }

  TPkgLinkInfo = class(TLazPackageLink)
  private
    FEffectiveFilename: string;
    FIsValid: boolean;
    FLPKInfo: TLPKInfo;
    FVisible: boolean;
  public
    constructor Create; override;
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); override;
    property Origin;
    property LPKUrl;
    property LPKInfo: TLPKInfo read FLPKInfo;
    property Visible: boolean read FVisible write FVisible;
    property IsValid: boolean read FIsValid write FIsValid;
    property EffectiveFilename: string read FEffectiveFilename write FEffectiveFilename;
    property OPMFileDate;
  end;

  { TPackageLinksDialog }

  TPackageLinksDialog = class(TForm)
    BtnPanel: TPanel;
    CloseBitBtn: TBitBtn;
    DeleteSelectedButton: TButton;
    FilterEdit: TEdit;
    LPKFileValidCheckBox: TCheckBox;
    LPKFileInvalidCheckBox: TCheckBox;
    LPKParsingTimer: TTimer;
    CopyCellToClipboardMenuItem: TMenuItem;
    GridPopupMenu: TPopupMenu;
    ShowGlobalLinksCheckBox: TCheckBox;
    ShowOnlineLinksCheckBox: TCheckBox;
    ShowUserLinksCheckBox: TCheckBox;
    ScopeGroupBox: TGroupBox;
    PkgStringGrid: TStringGrid;
    ProgressBar1: TProgressBar;
    UpdateGlobalLinksButton: TButton;
    procedure CopyCellToClipboardMenuItemClick(Sender: TObject);
    procedure DeleteSelectedButtonClick(Sender: TObject);
    procedure FilterEditChange(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure LPKFileValidCheckBoxChange(Sender: TObject);
    procedure LPKFileInvalidCheckBoxChange(Sender: TObject);
    procedure LPKParsingTimerTimer(Sender: TObject);
    procedure OnAllLPKParsed(Sender: TObject);
    procedure ShowLinksCheckBoxChange(Sender: TObject);
    procedure ShowOnlineLinksCheckBoxChange(Sender: TObject);
    procedure UpdateGlobalLinksButtonClick(Sender: TObject);
  private
    FCountGlobalLinks: integer;
    FCountLPKValid: integer;
    FCountLPKInvalid: integer;
    FCountOnlineLinks: Integer;
    FCountUserLinks: Integer;
    FLinks: TAVLTree; // tree of TPkgLinkInfo sorted for name and version
    FCollectingOrigin: TPkgLinkOrigin;
    procedure RescanGlobalLinks;
    procedure UpdateFacets;
    procedure UpdatePackageList;
    procedure ClearLinks;
    procedure IteratePackages(APackage: TLazPackageID);
    function GetLinkAtRow(Row: integer): TPkgLinkInfo;
    function GetLinkWithEffectiveFilename(Filename: string;
      Origins: TPkgLinkOrigins): TPkgLinkInfo;
    procedure PackageListAvailable(Sender: TObject);
  public
    property CountLPKValid: integer read FCountLPKValid;
    property CountLPKInvalid: integer read FCountLPKInvalid;
    property CountOnlineLinks: Integer read FCountOnlineLinks;
    property CountUserLinks: Integer read FCountUserLinks;
    property CountGlobalLinks: integer read FCountGlobalLinks;
  end;

function ShowPackageLinks: TModalResult;

implementation

{$R *.lfm}

function ShowPackageLinks: TModalResult;
var
  PackageLinksDialog: TPackageLinksDialog;
begin
  PackageLinksDialog:=TPackageLinksDialog.Create(nil);
  try
    Result:=PackageLinksDialog.ShowModal;
  finally
    PackageLinksDialog.Free;
  end;
end;

{ TPackageLinksDialog }

procedure TPackageLinksDialog.FormCreate(Sender: TObject);
begin
  Caption:=lisPLDPackageLinks;
  ScopeGroupBox.Caption:=dlgSearchScope;
  CopyCellToClipboardMenuItem.Caption:=srkmecCopy;
  DeleteSelectedButton.Caption:=lrsPLDDeleteSelected;
  UpdateGlobalLinksButton.Caption:=lrsRescanLplFiles;
  CloseBitBtn.Caption:=lisClose;
  FilterEdit.TextHint:=lisCEFilter;

  ProgressBar1.Style:=pbstMarquee;
  ProgressBar1.Visible:=true;
  LPKInfoCache.AddOnQueueEmpty(@OnAllLPKParsed);
  LPKInfoCache.StartLPKReaderWithAllAvailable;

  if Assigned(OPMInterface) then
    ShowOnlineLinksCheckBox.Checked := OPMInterface.IsPackageListLoaded
  else
    ShowOnlineLinksCheckBox.Enabled := False;
  // Set handler after setting Checked.
  ShowOnlineLinksCheckBox.OnChange := @ShowOnlineLinksCheckBoxChange;

  UpdatePackageList;
  if OPMInterface <> nil then
    OPMInterface.AddPackageListNotification(@PackageListAvailable);
end;

procedure TPackageLinksDialog.FormDestroy(Sender: TObject);
begin
  if OPMInterface <> nil then
    OPMInterface.RemovePackageListNotification(@PackageListAvailable);
  LPKInfoCache.EndLPKReader;
  LPKInfoCache.RemoveOnQueueEmpty(@OnAllLPKParsed);
  ClearLinks;
end;

procedure TPackageLinksDialog.FilterEditChange(Sender: TObject);
begin
  UpdatePackageList;
end;

procedure TPackageLinksDialog.CopyCellToClipboardMenuItemClick(Sender: TObject);
begin
  PkgStringGrid.CopyToClipboard(true);
end;

procedure TPackageLinksDialog.DeleteSelectedButtonClick(Sender: TObject);
var
  i: Integer;
  Link: TPkgLinkInfo;
  ErrMsg: String;
  HasOnline: Boolean;
begin
  ErrMsg:='';
  HasOnline:=false;
  for i:=1 to PkgStringGrid.RowCount-1 do
  begin
    if PkgStringGrid.Cells[0,i]=PkgStringGrid.Columns[0].ValueChecked then
    begin
      Link:=GetLinkAtRow(i);
      if Link=nil then begin
        HasOnline:=true;
        continue;
      end;
      case Link.Origin of
        ploGlobal: begin
          // delete lpl file
          if FileExistsCached(Link.LPLFilename) then begin
            if not DeleteFileUTF8(Link.LPLFilename) then
              ErrMsg+=Format(lrsPLDUnableToDeleteFile, [Link.LPLFilename])+LineEnding;
          end;
        end;
        ploOnline: HasOnline:=true;
        ploUser: LazPackageLinks.RemoveUserLinks(Link); // delete user link
      end;
    end;
  end;
  RescanGlobalLinks;
  UpdatePackageList;
  LazPackageLinks.SaveUserLinks;
  if ErrMsg<>'' then
  begin
    IDEMessageDialog(dlgMsgWinColorUrgentError,
      lisPLDSomePackagesCannotBeDeleted+':'+LineEnding
      +ErrMsg,mtError,[mbOk]);
  end else if HasOnline then begin
    IDEMessageDialog(dlgMsgWinColorUrgentError,
      lisPLDOnlinePackagesCannotBeDeleted, mtError, [
      mbOk]);
  end;
  if HasOnline then;
end;

procedure TPackageLinksDialog.LPKFileValidCheckBoxChange(Sender: TObject);
begin
  UpdatePackageList;
end;

procedure TPackageLinksDialog.LPKFileInvalidCheckBoxChange(Sender: TObject);
begin
  UpdatePackageList;
end;

procedure TPackageLinksDialog.LPKParsingTimerTimer(Sender: TObject);
begin
  UpdatePackageList;
end;

procedure TPackageLinksDialog.OnAllLPKParsed(Sender: TObject);
begin
  LPKParsingTimer.Enabled:=false;
  ProgressBar1.Visible:=false;
  ProgressBar1.Style:=pbstNormal;
  UpdatePackageList;
end;

procedure TPackageLinksDialog.ShowLinksCheckBoxChange(Sender: TObject);
begin
  UpdatePackageList;
end;

procedure TPackageLinksDialog.ShowOnlineLinksCheckBoxChange(Sender: TObject);
begin
  Assert(Assigned(OPMInterface), 'TPackageLinksDialog: OPMInterface=Nil.');
  if (Sender as TCheckBox).Checked and not OPMInterface.IsPackageListLoaded then
    OPMInterface.GetPackageList  // ListBox will be updated later by an event.
  else
    UpdatePackageList;
end;

procedure TPackageLinksDialog.UpdateGlobalLinksButtonClick(Sender: TObject);
begin
  RescanGlobalLinks;
  UpdatePackageList;
end;

procedure TPackageLinksDialog.UpdatePackageList;
var
  FilterCase: TCaption;
  FilterLo: String;

  function HasFilterText(Link: TPkgLinkInfo): boolean;
  begin
    Result:=true;
    if Pos(FilterLo,UTF8LowerCase(Link.Name))>0 then
      exit;
    if Pos(FilterLo,UTF8LowerCase(Link.Version.AsString))>0 then
      exit;
    if FilenamesCaseSensitive then {%H-}begin
      if Pos(FilterCase,Link.EffectiveFilename)>0 then
        exit;
    end else {%H-}begin
      if Pos(FilterLo,UTF8LowerCase(Link.EffectiveFilename))>0 then
        exit;
    end;
    Result:=false;
  end;

var
  Node: TAvlTreeNode;
  Link: TPkgLinkInfo;
  i: Integer;
  OriginStr: String;
  Info: TLPKInfo;
  NextNode: TAvlTreeNode;
  s: String;
begin
  // collect links
  ClearLinks;

  if FLinks=nil then
    FLinks:=TAVLTree.Create(@ComparePackageLinks);
  if ShowGlobalLinksCheckBox.Checked then begin
    FCollectingOrigin:=ploGlobal;
    LazPackageLinks.IteratePackages(false,@IteratePackages,[ploGlobal]);
  end;
  if ShowOnlineLinksCheckBox.Checked then begin
    FCollectingOrigin:=ploOnline;
    LazPackageLinks.IteratePackages(false,@IteratePackages,[ploOnline]);
  end;
  if ShowUserLinksCheckBox.Checked then begin
    FCollectingOrigin:=ploUser;
    LazPackageLinks.IteratePackages(false,@IteratePackages,[ploUser]);
  end;

  // query additional information from lpk files
  LPKInfoCache.EnterCritSection;
  try
    FCountLPKValid:=0;
    FCountLPKInvalid:=0;
    FCountGlobalLinks:=0;
    FCountUserLinks:=0;
    FCountOnlineLinks:=0;
    Node:=FLinks.FindLowest;
    FilterCase:=FilterEdit.Text;
    FilterLo:=UTF8LowerCase(FilterCase);
    while Node<>nil do begin
      Link:=TPkgLinkInfo(Node.Data);
      Link.Visible:=true;
      NextNode:=Node.Successor;
      Link.EffectiveFilename:=Link.GetEffectiveFilename;
      Info:=LPKInfoCache.FindPkgInfoWithFilename(Link.EffectiveFilename);

      // filter for Validity
      if Link.Visible then begin
        Link.IsValid:=true;
        if Info<>nil then begin
          Link.LPKInfo.Assign(Info);
          if Link.LPKInfo.LPKParsed=lpkiParsedError then
            Link.IsValid:=false;
        end else
          Link.IsValid:=false;
        if Link.IsValid then begin
          if not LPKFileValidCheckBox.Checked then Link.Visible:=false;
        end else begin
          if not LPKFileInvalidCheckBox.Checked then Link.Visible:=false;
        end;
      end;

      if Link.Visible and (FilterCase<>'') then begin
        // filter for text
        Link.Visible:=HasFilterText(Link);
      end;

      if Link.Visible then begin
        // this link is shown => increase facet counters
        if Link.IsValid then
          inc(FCountLPKValid)
        else
          inc(FCountLPKInvalid);
        case Link.Origin of
          ploGlobal: inc(FCountGlobalLinks);
          ploOnline: inc(FCountOnlineLinks);
          ploUser  : inc(FCountUserLinks);
        end;
      end else begin
        // delete link
        Link.Free;
        FLinks.Delete(Node);
      end;
      Node:=NextNode;
    end;
  finally
    LPKInfoCache.LeaveCritSection;
  end;

  // fill/update grid
  PkgStringGrid.RowCount:=FLinks.Count+1;
  PkgStringGrid.Columns[0].Title.Caption:=lisMenuSelect;
  PkgStringGrid.Columns[1].Title.Caption:=lisName;
  PkgStringGrid.Columns[2].Title.Caption:=lisVersion;
  PkgStringGrid.Columns[3].Title.Caption:=lisGroup;
  PkgStringGrid.Columns[4].Title.Caption:=lisOIPState;
  PkgStringGrid.Columns[5].Title.Caption:=lisA2PFilename2;
  PkgStringGrid.Columns[6].Title.Caption:=lisLastOpened;

  i:=1;
  Node:=FLinks.FindLowest;
  while Node<>nil do begin
    Link:=TPkgLinkInfo(Node.Data);
    Node:=Node.Successor;

    PkgStringGrid.Cells[0,i]:=PkgStringGrid.Columns[0].ValueUnchecked;
    PkgStringGrid.Cells[1,i]:=Link.Name;
    PkgStringGrid.Cells[2,i]:=Link.Version.AsString;
    case Link.Origin of
      ploGlobal: OriginStr:=lisPLDGlobal;
      ploOnline: OriginStr:=lisPLDOnline;
      ploUser  : OriginStr:=lisPLDUser;
    end;
    PkgStringGrid.Cells[3,i]:=OriginStr;

    if Link.Origin = ploOnline then
      s:=lrsPLDValid
    else
    begin
      if Link.IsValid then
        s:=lrsPLDValid
      else if (Info<>nil) and (Info.LPKError<>'') then
        s:=Info.LPKError
      else
        s:=lrsPLDInvalid;
    end;
    PkgStringGrid.Cells[4,i]:=s;

    if Link.Origin = ploOnline then
      PkgStringGrid.Cells[5,i]:=Link.LPKUrl
    else
      PkgStringGrid.Cells[5,i]:=Link.EffectiveFilename;

    if Link.Origin = ploOnline then
      PkgStringGrid.Cells[6,i]:= FormatDateTime('YYYY/MM/DD  hh:mm:ss', Link.OPMFileDate)
    else
    begin
      if Link.LastUsed=0 then
        PkgStringGrid.Cells[6,i]:= lisNever
      else
        PkgStringGrid.Cells[6,i]:= FormatDateTime('YYYY/MM/DD  hh:mm:ss', Link.LastUsed);
    end;

    inc(i);
  end;
  
  PkgStringGrid.AutoAdjustColumns;
  if PkgStringGrid.SortColumn>=0 then
    PkgStringGrid.SortColRow(true,PkgStringGrid.SortColumn);
  UpdateFacets;
end;

procedure TPackageLinksDialog.UpdateFacets;
begin
  ShowGlobalLinksCheckBox.Caption:=lisPLDShowGlobalLinksIn
     +LazPackageLinks.GetGlobalLinkDirectory+'*.lpl'
     +' ('+IntToStr(CountGlobalLinks)+')';
  ShowOnlineLinksCheckBox.Caption:=lisPLDShowOnlineLinks
     +' ('+IntToStr(CountOnlineLinks)+')';
  ShowUserLinksCheckBox.Caption:=lisPLDShowUserLinksIn
     +LazPackageLinks.GetUserLinkFile
     +' ('+IntToStr(CountUserLinks)+')';
  LPKFileValidCheckBox.Caption:=Format(lrsPLDLpkFileValid, [IntToStr(CountLPKValid)]);
  LPKFileInvalidCheckBox.Caption:=Format(lrsPLDLpkFileInvalid, [IntToStr(CountLPKInvalid)]);
end;

procedure TPackageLinksDialog.RescanGlobalLinks;
begin
  LazPackageLinks.UpdateGlobalLinks;
end;

procedure TPackageLinksDialog.ClearLinks;
begin
  if FLinks<>nil then begin
    FLinks.FreeAndClear;
    FreeAndNil(FLinks);
  end;
end;

procedure TPackageLinksDialog.IteratePackages(APackage: TLazPackageID);
var
  NewLink: TPkgLinkInfo;
begin
  NewLink:=TPkgLinkInfo.Create;
  NewLink.Assign(APackage);
  NewLink.Origin:=FCollectingOrigin;
  FLinks.Add(NewLink);
end;

function TPackageLinksDialog.GetLinkAtRow(Row: integer): TPkgLinkInfo;
var
  Origin: TPkgLinkOrigin;
  EffectiveFilename, S: String;
begin
  Result:=nil;
  if (Row<1) or (Row>=PkgStringGrid.RowCount) then exit;
  EffectiveFilename:=PkgStringGrid.Cells[5,Row];
  S := PkgStringGrid.Cells[3,Row];
  if S = lisPLDGlobal then
    Origin:=ploGlobal
  else if S = lisPLDOnline then
    Origin:=ploOnline
  else // lisPLDUser
    Origin:=ploUser;
  Result:=GetLinkWithEffectiveFilename(EffectiveFilename,[Origin]);
end;

function TPackageLinksDialog.GetLinkWithEffectiveFilename(Filename: string;
  Origins: TPkgLinkOrigins): TPkgLinkInfo;
var
  Node: TAvlTreeNode;
begin
  Node:=FLinks.FindLowest;
  while Node<>nil do begin
    Result:=TPkgLinkInfo(Node.Data);
    if (Result.Origin in Origins) and (Result.EffectiveFilename=Filename) then
      exit;
    Node:=Node.Successor;
  end;
  Result:=nil;
end;

procedure TPackageLinksDialog.PackageListAvailable(Sender: TObject);
begin
  DebugLn('TPackageLinksDialog.PackageListAvailable.');
  UpdatePackageList;
end;

{ TPkgLinkInfo }

constructor TPkgLinkInfo.Create;
begin
  inherited Create;
  FLPKInfo:=TLPKInfo.Create(TLazPackageID.Create);
end;

destructor TPkgLinkInfo.Destroy;
begin
  FreeAndNil(FLPKInfo);
  inherited Destroy;
end;

procedure TPkgLinkInfo.Assign(Source: TPersistent);
var
  Link: TLazPackageLink;
begin
  if Source is TLazPackageID then begin
    AssignID(TLazPackageID(Source));
    LPKInfo.Assign(Source);
    if Source is TLazPackageLink then begin
      Link:=TLazPackageLink(Source);
      Origin:=Link.Origin;
      LPKUrl := Link.LPKUrl;
      LPKFilename:=Link.LPKFilename;
      LPLFilename:=Link.LPLFilename;
      AutoCheckExists:=Link.AutoCheckExists;
      LPKFileDateValid:=Link.LPKFileDateValid;
      LPKFileDate:=Link.LPKFileDate;
      LastUsed:=Link.LastUsed;
      OPMFileDate:=Link.OPMFileDate;
    end;
  end else
    inherited Assign(Source);
end;

end.

