/********************************************************************\
 * gncOwner.h -- Business Interface:  Object OWNERs                 *
 *                                                                  *
 * This program 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.              *
 *                                                                  *
 * This program is distributed in the hope that it will be useful,  *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of   *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the    *
 * GNU General Public License for more details.                     *
 *                                                                  *
 * You should have received a copy of the GNU General Public License*
 * along with this program; if not, contact:                        *
 *                                                                  *
 * Free Software Foundation           Voice:  +1-617-542-5942       *
 * 51 Franklin Street, Fifth Floor    Fax:    +1-617-542-2652       *
 * Boston, MA  02110-1301,  USA       gnu@gnu.org                   *
 *                                                                  *
\********************************************************************/
/** @addtogroup Business
    @{ */
/** @addtogroup Owner
    @{ */
/** @file gncOwner.h
    @brief Business Interface:  Object OWNERs
    @author Copyright (C) 2001,2002 Derek Atkins <warlord@MIT.EDU>
    @author Copyright (c) 2005 Neil Williams <linux@codehelp.co.uk>
    @author Copyright (c) 2006 David Hampton <hampton@employees.org>
*/

#ifndef GNC_OWNER_H_
#define GNC_OWNER_H_

typedef struct _gncOwner GncOwner;

#define GNC_ID_OWNER   "gncOwner"

#include "qof.h"
#include "gncCustomer.h"
#include "gncJob.h"
#include "gncVendor.h"
#include "gncEmployee.h"
#include "gnc-lot.h"

typedef enum
{
    GNC_OWNER_NONE ,
    GNC_OWNER_UNDEFINED ,
    GNC_OWNER_CUSTOMER ,
    GNC_OWNER_JOB ,
    GNC_OWNER_VENDOR ,
    GNC_OWNER_EMPLOYEE ,
} GncOwnerType;

/** \name QOF handling

Whilst GncOwner is not a formal QOF object, these functions
are still expected to be useful in making GncOwner transparent
to QOF as they can be used by objects like GncInvoice.
@{
*/
/** return the type for the collection. */
QofIdTypeConst qofOwnerGetType(const GncOwner *owner);
/** return the owner itself as an entity. */
QofInstance* qofOwnerGetOwner (const GncOwner *owner);
/** set the owner from the entity. */
void qofOwnerSetEntity (GncOwner *owner, QofInstance *ent);

/** Returns the QofIdType of the given GncOwnerType, or NULL if no
 * suitable one exists. */
QofIdTypeConst gncOwnerTypeToQofIdType(GncOwnerType t);

gboolean
gncOwnerRegister(void);

/** @} */

#ifndef SWIG

/** \struct GncOwner */
struct _gncOwner
{
    GncOwnerType     type;      /**< Customer, Job, Vendor, Employee or Undefined. */
    union
    {
        gpointer       undefined;
        GncCustomer *  customer;
        GncJob *       job;
        GncVendor *    vendor;
        GncEmployee *  employee;
    } owner;                   /**< holds the pointer to the owner object. */
    gpointer         qof_temp; /**< Set type independently of the owner. */
};

#endif /* SWIG */

/** \name Setup routines
@{
*/
void gncOwnerInitUndefined (GncOwner *owner, gpointer obj);
void gncOwnerInitCustomer (GncOwner *owner, GncCustomer *customer);
void gncOwnerInitJob (GncOwner *owner, GncJob *job);
void gncOwnerInitVendor (GncOwner *owner, GncVendor *vendor);
void gncOwnerInitEmployee (GncOwner *owner, GncEmployee *employee);
/** @} */
/** \name Get routines.
@{
*/
GncOwnerType gncOwnerGetType (const GncOwner *owner);
gpointer gncOwnerGetUndefined (const GncOwner *owner);
GncCustomer * gncOwnerGetCustomer (const GncOwner *owner);
GncJob * gncOwnerGetJob (const GncOwner *owner);
GncVendor * gncOwnerGetVendor (const GncOwner *owner);
GncEmployee * gncOwnerGetEmployee (const GncOwner *owner);
/** @} */
void gncOwnerCopy (const GncOwner *src, GncOwner *dest);
gboolean gncOwnerEqual (const GncOwner *a, const GncOwner *b);
int gncOwnerCompare (const GncOwner *a, const GncOwner *b);

const char * gncOwnerGetName (const GncOwner *owner);
gnc_commodity * gncOwnerGetCurrency (const GncOwner *owner);

/** Get the GncGUID of the immediate owner */
const GncGUID * gncOwnerGetGUID (const GncOwner *owner);
GncGUID gncOwnerRetGUID (GncOwner *owner);

gboolean gncOwnerIsValid (const GncOwner *owner);

/**
 * Get the "parent" Owner or GncGUID thereof.  The "parent" owner
 * is the Customer or Vendor, or the Owner of a Job
 */
GncOwner * gncOwnerGetEndOwner (GncOwner *owner);
const GncGUID * gncOwnerGetEndGUID (GncOwner *owner);

/** attach an owner to a lot */
void gncOwnerAttachToLot (const GncOwner *owner, GNCLot *lot);

/** Get the owner from the lot.  If an owner is found in the lot,
 * fill in "owner" and return TRUE.  Otherwise return FALSE.
 */
gboolean gncOwnerGetOwnerFromLot (GNCLot *lot, GncOwner *owner);

gboolean gncOwnerGetOwnerFromTypeGuid (QofBook *book, GncOwner *owner, QofIdType type, GncGUID *guid);

/** Get the kvp-frame from the underlying owner object */
KvpFrame* gncOwnerGetSlots(GncOwner* owner);

#define OWNER_TYPE        "type"
#define OWNER_TYPE_STRING "type-string"  /**< Allows the type to be handled externally. */
#define OWNER_CUSTOMER    "customer"
#define OWNER_JOB         "job"
#define OWNER_VENDOR      "vendor"
#define OWNER_EMPLOYEE    "employee"
#define OWNER_PARENT      "parent"
#define OWNER_PARENTG     "parent-guid"
#define OWNER_NAME        "name"

#define OWNER_FROM_LOT    "owner-from-lot"

/**
 * These two functions are mainly for the convenience of scheme code.
 * Normal C code has no need to ever use these two functions, and rather
 * can just use a GncOwner directly and just pass around a pointer to it.
 */
GncOwner * gncOwnerCreate (void);
void gncOwnerDestroy (GncOwner *owner);

#endif /* GNC_OWNER_H_ */
/** @} */
/** @} */
