unit ce_libman;

{$I ce_defines.inc}

interface

uses
  Classes, SysUtils, FileUtil, ce_common, ce_writableComponent, ce_dcd;

type

  (**
   * Represents a D static library. In a project libAlias allows to
   * resolve automatically the dependencies of a project.
   *)
  TLibraryItem = class(TCollectionItem)
  private
    fAlias: string;
    fSourcePath: string;
    fLibFile: string;
  published
    property libAlias: string read fAlias write fAlias;
    property libSourcePath: string read fSourcePath write fSourcePath;
    property libFile: string read fLibFile write fLibFile;
  end;

  (**
   * Represents all the D libraries present on this system.
   *)
  TLibraryManager = class(TWritableComponent)
  private
    fCol: TCollection;
    procedure setCol(const aValue: TCollection);
    procedure addDubPackages;
  protected
    procedure afterLoad; override;
  published
    property libraries: TCollection read fCol write setCol;
  public
    constructor create(aOwner: TComponent); override;
    destructor destroy; override;
    //
    procedure getLibFiles(const someAliases, aList: TStrings);
    procedure getLibSources(const someAliases, aList: TStrings);
    //
    procedure updateDCD;
  end;

const
  libFname = 'libraryManager.txt';

var
  LibMan: TLibraryManager;

implementation

constructor TLibraryManager.create(aOwner: TComponent);
var
  fName: string;
begin
  inherited;
  fCol := TCollection.Create(TLibraryItem);
  fname := getCoeditDocPath + libFname;
  if fileExists(fname) then loadFromFile(fname);
end;

destructor TLibraryManager.destroy;
begin
  forceDirectory(getCoeditDocPath);
  LibMan.saveToFile(getCoeditDocPath + libFname);
  fCol.Free;
  inherited;
end;

procedure TLibraryManager.setCol(const aValue: TCollection);
begin
  fCol.assign(aValue);
end;

procedure TLibraryManager.addDubPackages;
//var
  //path: string;
begin
  if not exeInSysPath('dub' + exeExt) then exit;
  //
  //path := getUserDocPath + 'dub' + DirectorySeparator + 'packages';
  {
    get folders
    foreach folder in folders
    begin
      if find src/import/source then
        add libman entry with this folder (dcd completion, static explorer will use this)
        if find lib with matching libname then
          add lib file to the new libman item (runnable module can use it, alias can be specified in project)
    end

    set the dubpackage entries readonly, since they'll be regenerated for each cession
  }
end;

procedure TLibraryManager.updateDCD;
var
  itm: TLibraryItem;
  i: NativeInt;
begin
  if not DcdWrapper.available then exit;
  // note: new items are directly handled but removed ones still in cache until next cession.
  for i := 0 to fCol.Count-1 do
  begin
    itm := TLibraryItem(fCol.Items[i]);
    DcdWrapper.addImportFolder(itm.libSourcePath);
  end;
end;

(**
 * the caller gets all the *.lib/*.a files in aList if someAliases is nil
 * otherwise the static libs selected by the aliases in someAliases.
 *)
procedure TLibraryManager.getLibFiles(const someAliases, aList: TStrings);
var
  itm: TLibraryItem;
  lst: TStringList;
  i, j: NativeInt;
begin
  for i := 0 to fCol.Count-1 do
  begin
    itm := TLibraryItem(fCol.Items[i]);
    if someAliases <> nil then
      if someAliases.IndexOf(itm.libAlias) = -1 then
        continue;
    // single lib files
    if fileExists(itm.libFile) then
    begin
      if aList.IndexOf(itm.libFile) <> -1 then
        continue;
      if not FileExists(itm.libFile) then
        continue;
      aList.Add(itm.libFile);
    end
    // folder of lib file
    else if directoryExists(itm.libFile) then
    begin
      lst := TStringList.Create;
      try
        listFiles(lst, itm.libFile);
        for j:= 0 to lst.Count-1 do
        begin
          if extractFileExt(lst.Strings[j]) = libExt then
            if aList.IndexOf(lst.Strings[j]) = -1 then
              aList.Add(lst.Strings[j]);
        end;
      finally
        lst.Free;
      end;
    end;
  end;
end;

(**
 * the caller gets all the paths were are located the lib sources in aList if someAliases is nil
 * otherwise the paths were are located the lib sources selected by the aliases in someAliases.
 *)
procedure TLibraryManager.getLibSources(const someAliases, aList: TStrings);
var
  itm: TLibraryItem;
  i: NativeInt;
begin
  for i := 0 to fCol.Count-1 do
  begin
    itm := TLibraryItem(fCol.Items[i]);
    if someAliases <> nil then
      if someAliases.IndexOf(itm.libAlias) = -1 then
        continue;
    //
    if aList.IndexOf(itm.libSourcePath) <> -1 then
      continue;
    if not directoryExists(itm.libSourcePath) then
      continue;
    aList.Add('-I' + itm.libSourcePath);
  end;
end;

procedure TLibraryManager.afterLoad;
begin
  updateDCD;
end;

initialization
  registerClasses([TLibraryManager, TLibraryItem]);
  LibMan := TLibraryManager.create(nil);
finalization
  LibMan.Free;
end.