/* Copyright 2012. Bloomberg Finance L.P.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:  The above
 * copyright notice and this permission notice shall be included in all copies
 * or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */
// blpapi_identity.h                                                  -*-C++-*-
#ifndef INCLUDED_BLPAPI_IDENTITY
#define INCLUDED_BLPAPI_IDENTITY

//@PURPOSE: Provide access to the entitlements for a user.
//
//@CLASSES:
// blpapi::Identity: Represents an identification of a user
//
//@DESCRIPTION: This component provides an identification of a user and
// implements the access to the entitlements.

#include <blpapi_defs.h>
#include <blpapi_exception.h>
#include <blpapi_service.h>
#include <blpapi_types.h>

#ifdef __cplusplus
extern "C" {
#endif

BLPAPI_EXPORT
void blpapi_Identity_release(blpapi_Identity_t *handle);

BLPAPI_EXPORT
int blpapi_Identity_addRef(blpapi_Identity_t *handle);

BLPAPI_EXPORT
int blpapi_Identity_hasEntitlements(const blpapi_Identity_t *handle,
        const blpapi_Service_t *service,
        const blpapi_Element_t *eidElement,
        const int *entitlementIds,
        size_t numEntitlements,
        int *failedEntitlements,
        int *failedEntitlementsCount);

BLPAPI_EXPORT
int blpapi_Identity_isAuthorized(
        const blpapi_Identity_t *handle, const blpapi_Service_t *service);

BLPAPI_EXPORT
int blpapi_Identity_getSeatType(
        const blpapi_Identity_t *handle, int *seatType);

#ifdef __cplusplus
}

#include <utility>

namespace BloombergLP {
namespace blpapi {

class Element;
// ==============
// class Identity
// ==============

class Identity {
    // Provides access to the entitlements for a specific user.
    //
    // An unauthorized Identity is created using
    // Session::createIdentity(). Once a Identity has been created
    // it can be authorized using
    // Session::sendAuthorizationRequest(). The authorized Identity
    // can then be queried or used in Session::subscribe() or
    // Session::sendRequest() calls.
    //
    // Once authorized a Identity has access to the entitlements of
    // the user which it was validated for.
    //
    // The Identity is a reference counted handle, copying it or
    // assigning it does not duplicate the underlying entitlement
    // data. Once the last Identity referring to the underlying
    // entitlement data is destroyed that entitlement data is
    // discarded and can only be re-established using
    // Session::sendAuthorizationRequest() again.

    blpapi_Identity_t *d_handle_p;

    void addRef();
    void release();

  public:
    enum SeatType {
        INVALID_SEAT = BLPAPI_SEATTYPE_INVALID_SEAT,
        BPS = BLPAPI_SEATTYPE_BPS, // Bloomberg Professional Service
        NONBPS = BLPAPI_SEATTYPE_NONBPS
    };

  public:
    Identity(blpapi_Identity_t *handle);
    // Assume ownership of the raw handle

    Identity();
    // Create an uninitialized Identity. The only valid operations
    // on an uninitialized Identity are assignment, isValid() and
    // destruction.

    Identity(const Identity& original);
    // Copy constructor

    ~Identity();
    // Destructor. Destroying the last Identity for a specific
    // user cancels any authorizations associated with it.

    // MANIPULATORS

    Identity& operator=(const Identity&);
    // Assignment operator.

    // ACCESSORS
    bool hasEntitlements(const Service& service,
            const int *entitlementIds,
            size_t numEntitlements) const;
    // Return true if this 'Identity' is authorized for the specified
    // 'service' and the first 'numEntitlements' elements of the specified
    // 'entitlementIds' array; otherwise return false. The behavior is
    // undefined unless 'entitlementIds' is an array containing at least
    // 'numEntitlements' elements.

    bool hasEntitlements(const Service& service,
            const int *entitlementIds,
            size_t numEntitlements,
            int *failedEntitlements,
            int *failedEntitlementsCount) const;
    // Return 'true' if this 'Identity' is authorized both for the
    // specified 'service' and for the first 'numEntitlements' elements in
    // the specified 'entitlementIds' array; otherwise fill the specified
    // 'failedEntitlements' array with the subset of 'entitlementIds' this
    // 'Identity' is not authorized for, load the number of such
    // entitlements into the specified 'failedEntitlementsCount', and
    // return 'false'.
    //
    // 'failedEntitlementsCount' is used both as an input and as an
    // output parameter:
    // - As input, it is the size of the specified 'failedEntitlements'
    //   array, the function will fill only up to '*failedEntitlementsCount'
    //   elements.
    // - As output, it is the number of the failed entitlements in
    //   'failedEntitlements' array.

    bool hasEntitlements(const Service& service,
            const Element& entitlementIds,
            int *failedEntitlements,
            int *failedEntitlementsCount) const;
    // Return 'true' if this 'Identity' is authorized for the specified
    // 'service' and for each of the entitlement IDs contained in the
    // 'entitlementIds', which must be an 'Element' which is either
    // an integer, or an array of integers; otherwise, fill the specified
    // 'failedEntitlements' array with the subset of entitlement IDs this
    // 'Identity' is not authorized for, load the number of such
    // entitlements into the specified 'failedEntitlementsCount', and
    // return 'false'.
    //
    // 'failedEntitlementsCount' is used both as an input and as an
    // output parameter:
    // - As input, it is the size of the specified 'failedEntitlements'
    //   array, the function will fill only up to '*failedEntitlementsCount'
    //   elements.
    // - As output, it is the number of the failed entitlements in
    //   'failedEntitlements' array.

    bool isValid() const;
    // Return true if this 'Identity' is valid; otherwise return false.
    // Note that a valid 'Identity' has not necessarily been authorized.
    // This function is deprecated.

    bool isAuthorized(const Service& service) const;
    // Return true if this 'Identity' is authorized to consume the
    // specified 'service'; otherwise return false.

    SeatType getSeatType() const;
    // Return the seat type of this 'Identity'.

    blpapi_Identity_t *handle() const;
};

//=============================================================================
//                           INLINE FUNCTION DEFINITIONS
//=============================================================================

// --------------
// class Identity
// --------------

inline Identity::Identity()
    : d_handle_p(0)
{
}

inline Identity::Identity(blpapi_Identity_t *newHandle)
    : d_handle_p(newHandle)
{
}

inline Identity::Identity(const Identity& original)
    : d_handle_p(original.d_handle_p)
{
    addRef();
}

inline Identity::~Identity() { release(); }

inline Identity& Identity::operator=(const Identity& rhs)
{
    using std::swap;

    Identity tmp(rhs);
    swap(tmp.d_handle_p, d_handle_p);

    return *this;
}

inline void Identity::addRef()
{
    if (d_handle_p) {
        blpapi_Identity_addRef(d_handle_p);
    }
}

inline void Identity::release()
{
    if (d_handle_p) {
        blpapi_Identity_release(d_handle_p);
    }
}

inline bool Identity::hasEntitlements(const Service& service,
        const int *entitlementIds,
        size_t numEntitlements) const
{
    return blpapi_Identity_hasEntitlements(d_handle_p,
                   service.handle(),
                   0,
                   entitlementIds,
                   numEntitlements,
                   0,
                   0)
            ? true
            : false;
}

inline bool Identity::hasEntitlements(const Service& service,
        const int *entitlementIds,
        size_t numEntitlements,
        int *failedEntitlements,
        int *failedEntitlementsCount) const
{
    return blpapi_Identity_hasEntitlements(d_handle_p,
                   service.handle(),
                   0,
                   entitlementIds,
                   numEntitlements,
                   failedEntitlements,
                   failedEntitlementsCount)
            ? true
            : false;
}

inline bool Identity::hasEntitlements(const Service& service,
        const Element& entitlementIds,
        int *failedEntitlements,
        int *failedEntitlementsCount) const
{
    return blpapi_Identity_hasEntitlements(d_handle_p,
                   service.handle(),
                   entitlementIds.handle(),
                   0,
                   0,
                   failedEntitlements,
                   failedEntitlementsCount)
            ? true
            : false;
}

inline bool Identity::isValid() const { return (d_handle_p != 0); }

inline bool Identity::isAuthorized(const Service& service) const
{
    return blpapi_Identity_isAuthorized(d_handle_p, service.handle()) ? true
                                                                      : false;
}

inline Identity::SeatType Identity::getSeatType() const
{
    int seatType = BLPAPI_SEATTYPE_INVALID_SEAT;
    ExceptionUtil::throwOnError(
            blpapi_Identity_getSeatType(d_handle_p, &seatType));
    return static_cast<SeatType>(seatType);
}

inline blpapi_Identity_t *Identity::handle() const { return d_handle_p; }

} // close namespace blpapi
} // close namespace BloombergLP

#endif // #ifdef __cplusplus
#endif // #ifndef INCLUDED_BLPAPI_IDENTITY