unit uTarifasController;

interface


uses
  Classes, SysUtils, uDADataTable, uEditorDBItem,
  uIDataModuleTarifas, uBizTarifas, uControllerBase;

type
  ITarifasController = interface(IControllerBase)
  ['{8BE07EA4-9B66-426A-93C7-653D8594AE81}']
    function BuscarTodos: IBizTarifa;
    procedure VerTodos(ATarifas: IBizTarifa);
    procedure Anadir(ATarifa : IBizTarifa);
    function Eliminar(ATarifa : IBizTarifa): Boolean;
    function Guardar(ATarifa : IBizTarifa): Boolean;
    procedure DescartarCambios(ATarifa : IBizTarifa);
    function Localizar(ATarifas: IBizTarifa; ADescripcion:String): Boolean;
    function DarListaTarifas: TStringList;
    function elegirTarifa: String;
  end;

  TTarifasController = class(TControllerBase, ITarifasController)
  protected
    FDataModule : IDataModuleTarifas;

    procedure RecibirAviso(ASujeto: ISujeto; ADataTable: IDAStronglyTypedDataTable); override;
    function CreateEditor(const AName : String; const IID: TGUID; out Intf): Boolean;

    function ValidarAlmacen(ATarifa: IBizTarifa): Boolean;

    //Estos son los tres métodos a sobre escribir si se desea heredar toda la logica de
    //este controller
    procedure AsignarDataModule; virtual;

    procedure ValidarObjetos; virtual;

  public
    constructor Create; override;
    destructor Destroy; override;

    function Eliminar(ATarifa : IBizTarifa): Boolean;
    function Guardar(ATarifa : IBizTarifa): Boolean;
    procedure DescartarCambios(ATarifa : IBizTarifa); virtual;
    procedure Anadir(ATarifa : IBizTarifa);
    function BuscarTodos: IBizTarifa;
    procedure VerTodos(ATarifas: IBizTarifa);
    function Localizar(ATarifas: IBizTarifa; ADescripcion:String): Boolean;
    function DarListaTarifas: TStringList;
    function elegirTarifa: String;
  end;

implementation

uses
  cxControls, DB, uEditorRegistryUtils, schTarifasClient_Intf,
  uIEditorTarifas, uDataModuleTarifas,
  uDAInterfaces, uDataTableUtils, uIEditorElegirTarifa,
  uDateUtils, uROTypes, DateUtils, Controls, Windows;

{ TTarifasController }

procedure TTarifasController.Anadir(ATarifa: IBizTarifa);
begin
  ATarifa.Insert;
end;

procedure TTarifasController.AsignarDataModule;
begin
  FDataModule := TDataModuleTarifas.Create(Nil);
end;

function TTarifasController.BuscarTodos: IBizTarifa;
begin
  Result := FDataModule.GetItems;
end;

constructor TTarifasController.Create;
begin
  inherited;
  AsignarDataModule;
end;

function TTarifasController.CreateEditor(const AName: String; const IID: TGUID; out Intf): Boolean;
begin
  Result := Supports(EditorRegistry.CreateEditor(AName), IID, Intf);
end;

function TTarifasController.DarListaTarifas: TStringList;
var
  ATarifas: IBizTarifa;
begin
  ATarifas := BuscarTodos;
  ATarifas.DataTable.Active := True;
  Result := TStringList.Create;
  try
    with Result do
    begin
      ATarifas.DataTable.First;
      while not ATarifas.DataTable.EOF do
      begin
        Add(ATarifas.DESCRIPCION);
        ATarifas.DataTable.Next;
      end;
    end;
  finally
    ATarifas := NIL;
  end;
end;

procedure TTarifasController.DescartarCambios(ATarifa: IBizTarifa);
begin
  if not Assigned(ATarifa) then
    raise Exception.Create ('Tarifa no asignado');

  ShowHourglassCursor;
  try
    if (ATarifa.State in dsEditModes) then
      ATarifa.Cancel;

    ATarifa.DataTable.CancelUpdates;
  finally
    HideHourglassCursor;
  end;
end;

destructor TTarifasController.Destroy;
begin
  FDataModule := Nil;
  inherited;
end;

function TTarifasController.elegirTarifa: String;
var
  AEditor : IEditorElegirTarifa;

begin
  Result := '';

  CreateEditor('EditorElegirTarifa', IEditorElegirTarifa, AEditor);
  if Assigned(AEditor) then
     try
       if (AEditor.ShowModal = mrOk) then
          Result := AEditor.Tarifa;
     finally
       AEditor.Release;
       AEditor := NIL;
     end;
end;

function TTarifasController.ValidarAlmacen(ATarifa: IBizTarifa): Boolean;
begin
  Result := False;

  if not Assigned(ATarifa) then
    raise Exception.Create ('Tarifa no asignada');

  if (ATarifa.DataTable.State in dsEditModes) then
      ATarifa.DataTable.Post;

  Result := True;
end;

procedure TTarifasController.ValidarObjetos;
begin
//
end;

procedure TTarifasController.VerTodos(ATarifas: IBizTarifa);
var
  AEditor : IEditorTarifas;
begin
  AEditor := NIL;

  CreateEditor('EditorTarifas', IEditorTarifas, AEditor);
  if Assigned(AEditor) then
    try
       AEditor.Controller := Self; //OJO ORDEN MUY IMPORTANTE
       AEditor.Tarifas := ATarifas;
       AEditor.ShowModal;
    finally
       AEditor.Release;
       AEditor := NIL;
    end;
end;

function TTarifasController.Eliminar(ATarifa: IBizTarifa): Boolean;
begin
  Result := False;

  if not Assigned(ATarifa) then
    raise Exception.Create ('Tarifa no asignada');

  ShowHourglassCursor;
  try
    if (ATarifa.State in dsEditModes) then
      ATarifa.Cancel;

    ATarifa.Delete;
    ATarifa.DataTable.ApplyUpdates;

    Result := True;
  finally
    HideHourglassCursor;
  end;
end;

procedure TTarifasController.RecibirAviso(ASujeto: ISujeto; ADataTable: IDAStronglyTypedDataTable);
begin
  inherited;
//
end;

function TTarifasController.Guardar(ATarifa: IBizTarifa): Boolean;
begin
  Result := False;

  if not Assigned(ATarifa) then
    raise Exception.Create ('Tarifa no asignada');

  ValidarObjetos;

  if ValidarAlmacen(ATarifa) then
  begin
    ShowHourglassCursor;
    try
      ATarifa.DataTable.ApplyUpdates;
      Result := True;
    finally
      HideHourglassCursor;
    end;
  end;
end;

function TTarifasController.Localizar(ATarifas: IBizTarifa; ADescripcion: String): Boolean;
begin
  Result := True;
  ShowHourglassCursor;
  try
    with ATarifas.DataTable do
    begin
      DisableControls;
      First;
      if not Locate(fld_TarifasDESCRIPCION, ADescripcion, []) then
         Result := False;
      EnableControls;
    end;
  finally
    HideHourglassCursor;
  end;
end;

end.