/*

 File: main.c

 Abstract: FortuneCookie example application main

 Version: 1.0

 Disclaimer: IMPORTANT:  This Apple software is supplied to you by 

 Apple Inc. ("Apple") in consideration of your agreement to the

 following terms, and your use, installation, modification or

 redistribution of this Apple software constitutes acceptance of these

 terms.  If you do not agree with these terms, please do not use,

 install, modify or redistribute this Apple software.

 In consideration of your agreement to abide by the following terms, and

 subject to these terms, Apple grants you a personal, non-exclusive

 license, under Apple's copyrights in this original Apple software (the

 "Apple Software"), to use, reproduce, modify and redistribute the Apple

 Software, with or without modifications, in source and/or binary forms;

 provided that if you redistribute the Apple Software in its entirety and

 without modifications, you must retain this notice and the following

 text and disclaimers in all such redistributions of the Apple Software. 

 Neither the name, trademarks, service marks or logos of Apple Inc. 

 may be used to endorse or promote products derived from the Apple

 Software without specific prior written permission from Apple.  Except

 as expressly stated in this notice, no other rights or licenses, express

 or implied, are granted by Apple herein, including but not limited to

 any patent rights that may be infringed by your derivative works or by

 other works in which the Apple Software may be incorporated.

 The Apple Software is provided by Apple on an "AS IS" basis.  APPLE

 MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION

 THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS

 FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND

 OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.

 IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL

 OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,

 MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED

 AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),

 STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE

 POSSIBILITY OF SUCH DAMAGE.

 Copyright (C) 2008 Apple Inc. All Rights Reserved.

 */

//==============================================================================

//

//  DO NOT MODIFY THE CONTENT OF THIS FILE

//

//  This file contains the generic CFPlug-in code necessary for your importer

//  To complete your importer implement the function in GetMetadataForFile.c

//

//==============================================================================

#include <CoreFoundation/CoreFoundation.h>

#include <CoreFoundation/CFPlugInCOM.h>

#include <CoreServices/CoreServices.h>

// -----------------------------------------------------------------------------

//  constants

// -----------------------------------------------------------------------------

#define PLUGIN_ID "624D6A25-5608-47BB-AD51-A94C7F7F1F77"

//

// Below is the generic glue code for all plug-ins.

//

// You should not have to modify this code aside from changing

// names if you decide to change the names defined in the Info.plist

//

// -----------------------------------------------------------------------------

//  typedefs

// -----------------------------------------------------------------------------

// The import function to be implemented in GetMetadataForFile.c

Boolean GetMetadataForFile(void *thisInterface, 

               CFMutableDictionaryRef attributes, 

               CFStringRef contentTypeUTI,

               CFStringRef pathToFile);

// The layout for an instance of MetaDataImporterPlugIn 

typedef struct __MetadataImporterPluginType

{

    MDImporterInterfaceStruct *conduitInterface;

    CFUUIDRef                 factoryID;

    UInt32                    refCount;

} MetadataImporterPluginType;

// -----------------------------------------------------------------------------

//  prototypes

// -----------------------------------------------------------------------------

//  Forward declaration for the IUnknown implementation.

//

MetadataImporterPluginType  *AllocMetadataImporterPluginType(CFUUIDRef inFactoryID);

void                      DeallocMetadataImporterPluginType(MetadataImporterPluginType *thisInstance);

HRESULT                   MetadataImporterQueryInterface(void *thisInstance,REFIID iid,LPVOID *ppv);

void                     *MetadataImporterPluginFactory(CFAllocatorRef allocator,CFUUIDRef typeID);

ULONG                     MetadataImporterPluginAddRef(void *thisInstance);

ULONG                     MetadataImporterPluginRelease(void *thisInstance);

// -----------------------------------------------------------------------------

//  testInterfaceFtbl   definition

// -----------------------------------------------------------------------------

//  The TestInterface function table.

//

static MDImporterInterfaceStruct testInterfaceFtbl = {

    NULL,

    MetadataImporterQueryInterface,

    MetadataImporterPluginAddRef,

    MetadataImporterPluginRelease,

    GetMetadataForFile

};

// -----------------------------------------------------------------------------

//  AllocMetadataImporterPluginType

// -----------------------------------------------------------------------------

//  Utility function that allocates a new instance.

//      You can do some initial setup for the importer here if you wish

//      like allocating globals etc...

//

MetadataImporterPluginType *AllocMetadataImporterPluginType(CFUUIDRef inFactoryID)

{

    MetadataImporterPluginType *theNewInstance;

    theNewInstance = (MetadataImporterPluginType *)malloc(sizeof(MetadataImporterPluginType));

    memset(theNewInstance,0,sizeof(MetadataImporterPluginType));

        /* Point to the function table */

    theNewInstance->conduitInterface = &testInterfaceFtbl;

        /*  Retain and keep an open instance refcount for each factory. */

    theNewInstance->factoryID = CFRetain(inFactoryID);

    CFPlugInAddInstanceForFactory(inFactoryID);

        /* This function returns the IUnknown interface so set the refCount to one. */

    theNewInstance->refCount = 1;

    return theNewInstance;

}

// -----------------------------------------------------------------------------

//  DeallocFortuneCookieMDImporterPluginType

// -----------------------------------------------------------------------------

//  Utility function that deallocates the instance when

//  the refCount goes to zero.

//      In the current implementation importer interfaces are never deallocated

//      but implement this as this might change in the future

//

void DeallocMetadataImporterPluginType(MetadataImporterPluginType *thisInstance)

{

    CFUUIDRef theFactoryID;

    theFactoryID = thisInstance->factoryID;

    free(thisInstance);

    if (theFactoryID){

        CFPlugInRemoveInstanceForFactory(theFactoryID);

        CFRelease(theFactoryID);

    }

}

// -----------------------------------------------------------------------------

//  MetadataImporterQueryInterface

// -----------------------------------------------------------------------------

//  Implementation of the IUnknown QueryInterface function.

//

HRESULT MetadataImporterQueryInterface(void *thisInstance,REFIID iid,LPVOID *ppv)

{

    CFUUIDRef interfaceID;

    interfaceID = CFUUIDCreateFromUUIDBytes(kCFAllocatorDefault,iid);

    if (CFEqual(interfaceID,kMDImporterInterfaceID)){

            /* If the Right interface was requested, bump the ref count,

             * set the ppv parameter equal to the instance, and

             * return good status.

             */

        ((MetadataImporterPluginType*)thisInstance)->conduitInterface->AddRef(thisInstance);

        *ppv = thisInstance;

        CFRelease(interfaceID);

        return S_OK;

    }else{

        if (CFEqual(interfaceID,IUnknownUUID)){

                /* If the IUnknown interface was requested, same as above. */

            ((MetadataImporterPluginType*)thisInstance )->conduitInterface->AddRef(thisInstance);

            *ppv = thisInstance;

            CFRelease(interfaceID);

            return S_OK;

        }else{

                /* Requested interface unknown, bail with error. */

            *ppv = NULL;

            CFRelease(interfaceID);

            return E_NOINTERFACE;

        }

    }

}

// -----------------------------------------------------------------------------

//  MetadataImporterPluginAddRef

// -----------------------------------------------------------------------------

//  Implementation of reference counting for this type. Whenever an interface

//  is requested, bump the refCount for the instance. NOTE: returning the

//  refcount is a convention but is not required so don't rely on it.

//

ULONG MetadataImporterPluginAddRef(void *thisInstance)

{

    ((MetadataImporterPluginType *)thisInstance )->refCount += 1;

    return ((MetadataImporterPluginType*) thisInstance)->refCount;

}

// -----------------------------------------------------------------------------

// SampleCMPluginRelease

// -----------------------------------------------------------------------------

//  When an interface is released, decrement the refCount.

//  If the refCount goes to zero, deallocate the instance.

//

ULONG MetadataImporterPluginRelease(void *thisInstance)

{

    ((MetadataImporterPluginType*)thisInstance)->refCount -= 1;

    if (((MetadataImporterPluginType*)thisInstance)->refCount == 0){

        DeallocMetadataImporterPluginType((MetadataImporterPluginType*)thisInstance );

        return 0;

    }else{

        return ((MetadataImporterPluginType*) thisInstance )->refCount;

    }

}

// -----------------------------------------------------------------------------

//  FortuneCookieMDImporterPluginFactory

// -----------------------------------------------------------------------------

//  Implementation of the factory function for this type.

//

void *MetadataImporterPluginFactory(CFAllocatorRef allocator,CFUUIDRef typeID)

{

    MetadataImporterPluginType *result;

    CFUUIDRef                 uuid;

        /* If correct type is being requested, allocate an

         * instance of TestType and return the IUnknown interface.

         */

    if (CFEqual(typeID,kMDImporterTypeID)){

        uuid = CFUUIDCreateFromString(kCFAllocatorDefault,CFSTR(PLUGIN_ID));

        result = AllocMetadataImporterPluginType(uuid);

        CFRelease(uuid);

        return result;

    }

        /* If the requested type is incorrect, return NULL. */

    return NULL;

}