UnrealEngineUWP/Engine/Source/Developer/AssetTools/Public/IAssetTools.h

// Copyright 1998-2015 Epic Games, Inc. All Rights Reserved.

#pragma once

class IAssetTypeActions;
class IClassTypeActions;
class FAssetData;
class UFactory;

struct FAssetRenameData
{
	TWeakObjectPtr<UObject> Asset;
	FString PackagePath;
	FString NewName;
	FString OriginalAssetPath;

	FAssetRenameData(const TWeakObjectPtr<UObject>& InAsset, const FString& InPackagePath, const FString& InNewName)
		: Asset(InAsset)
		, PackagePath(InPackagePath)
		, NewName(InNewName)
	{
		if(InAsset.IsValid())
		{
			OriginalAssetPath = InAsset.Get()->GetOutermost()->GetName();
		}
	}
};

DECLARE_MULTICAST_DELEGATE_OneParam(FAssetPostRenameEvent, const TArray<FAssetRenameData>&);

// The list of categories for Asset Type Actions and UFactory subclasses
namespace EAssetTypeCategories
{
	enum Type
	{
		None					= 0,
		Basic					= 1 << 0,
		Animation				= 1 << 1,
		MaterialsAndTextures	= 1 << 2,
		Sounds					= 1 << 3,
		Physics					= 1 << 4,
		UI						= 1 << 5,
		Misc					= 1 << 6,
		Gameplay				= 1 << 7,
		Blueprint				= 1 << 8,

		// Items below this will be allocated at runtime via RegisterAdvancedAssetCategory
		FirstUser				= 1 << 9,
		LastUser				= 1 << 31,
		// Last allowed value is 1 << 31
	};
}


struct FAdvancedAssetCategory
{
	EAssetTypeCategories::Type CategoryType;
	FText CategoryName;

	FAdvancedAssetCategory(EAssetTypeCategories::Type InCategoryType, FText InCategoryName)
		: CategoryType(InCategoryType)
		, CategoryName(InCategoryName)
	{
	}
};

class IAssetTools
{
public:
	/** Virtual destructor */
	virtual ~IAssetTools() {}

	/** Registers an asset type actions object so it can provide information about and actions for asset types. */
	virtual void RegisterAssetTypeActions(const TSharedRef<IAssetTypeActions>& NewActions) = 0;

	/** Unregisters an asset type actions object. It will no longer provide information about or actions for asset types. */
	virtual void UnregisterAssetTypeActions(const TSharedRef<IAssetTypeActions>& ActionsToRemove) = 0;

	/** Generates a list of currently registered AssetTypeActions */
	virtual void GetAssetTypeActionsList( TArray<TWeakPtr<IAssetTypeActions>>& OutAssetTypeActionsList ) const = 0;

	/** Gets the appropriate AssetTypeActions for the supplied class */
	virtual TWeakPtr<IAssetTypeActions> GetAssetTypeActionsForClass( UClass* Class ) const = 0;

	/**
	 * Allocates a Category bit for a user-defined Category, or EAssetTypeCategories::Misc if all available bits are allocated.
	 * Ignores duplicate calls with the same CategoryKey (returns the existing bit but does not change the display name).
	 */
	virtual EAssetTypeCategories::Type RegisterAdvancedAssetCategory(FName CategoryKey, FText CategoryDisplayName) = 0;

	/** Returns the allocated Category bit for a user-specified Category, or EAssetTypeCategories::Misc if it doesn't exist */
	virtual EAssetTypeCategories::Type FindAdvancedAssetCategory(FName CategoryKey) const = 0;
	
	/** Returns the list of all advanced asset categories */
	virtual void GetAllAdvancedAssetCategories(TArray<FAdvancedAssetCategory>& OutCategoryList) const = 0;

	/** Registers a class type actions object so it can provide information about and actions for class asset types. */
	virtual void RegisterClassTypeActions(const TSharedRef<IClassTypeActions>& NewActions) = 0;

	/** Unregisters a class type actions object. It will no longer provide information about or actions for class asset types. */
	virtual void UnregisterClassTypeActions(const TSharedRef<IClassTypeActions>& ActionsToRemove) = 0;

	/** Generates a list of currently registered ClassTypeActions */
	virtual void GetClassTypeActionsList( TArray<TWeakPtr<IClassTypeActions>>& OutClassTypeActionsList ) const = 0;

	/** Gets the appropriate ClassTypeActions for the supplied class */
	virtual TWeakPtr<IClassTypeActions> GetClassTypeActionsForClass( UClass* Class ) const = 0;

	/**
	 * Fills out a menubuilder with a list of commands that can be applied to the specified objects.
	 *
	 * @param InObjects the objects for which to generate type-specific menu options
	 * @param MenuBuilder the menu in which to build options
	 * @param bIncludeHeader if true, will include a heading in the menu if any options were found
	 * @return true if any options were added to the MenuBuilder
	 */
	virtual bool GetAssetActions( const TArray<UObject*>& InObjects, class FMenuBuilder& MenuBuilder, bool bIncludeHeading = true ) = 0;

	/**
	 * Creates an asset with the specified name, path, and factory
	 *
	 * @param AssetName the name of the new asset
	 * @param PackagePath the package that will contain the new asset
	 * @param AssetClass the class of the new asset
	 * @param Factory the factory that will build the new asset
	 * @param CallingContext optional name of the module or method calling CreateAsset() - this is passed to the factory
	 * @return the new asset or NULL if it fails
	 */
	virtual UObject* CreateAsset(const FString& AssetName, const FString& PackagePath, UClass* AssetClass, UFactory* Factory, FName CallingContext = NAME_None) = 0;

	/** Opens an asset picker dialog and creates an asset with the chosen path */
	virtual UObject* CreateAsset(UClass* AssetClass, UFactory* Factory, FName CallingContext = NAME_None) = 0;

	/** Creates an asset with the specified name and path. Uses OriginalObject as the duplication source. */
	virtual UObject* DuplicateAsset(const FString& AssetName, const FString& PackagePath, UObject* OriginalObject) = 0;

	/** Renames assets using the specified names. */
	virtual void RenameAssets(const TArray<FAssetRenameData>& AssetsAndNames) const = 0;

	/** Event issued at the end of the rename process */
	virtual FAssetPostRenameEvent& OnAssetPostRename() = 0;

	/** Opens a file open dialog to choose files to import to the destination path. */
	virtual TArray<UObject*> ImportAssets(const FString& DestinationPath) = 0;

	/** 
	 * Imports the specified files to the destination path. 
	 *
	 * @param Files				Files to import
	 * @param DestinationPath	destination path for imported files
	 * @param ChosenFactory		Specific factory to use for object creation
	 * @param bSyncToBrowser	If true sync content browser to first imported asset after import
	 */
	virtual TArray<UObject*> ImportAssets(const TArray<FString>& Files, const FString& DestinationPath, UFactory* ChosenFactory = NULL, bool bSyncToBrowser = true) const = 0;

	/** Creates a unique package and asset name taking the form InBasePackageName+InSuffix */
	virtual void CreateUniqueAssetName(const FString& InBasePackageName, const FString& InSuffix, FString& OutPackageName, FString& OutAssetName) const = 0;

	/** Returns true if the specified asset uses a stock thumbnail resource */
	virtual bool AssetUsesGenericThumbnail( const FAssetData& AssetData ) const = 0;

	/**
	 * Try to diff the local version of an asset against the latest one from the depot 
	 * 
	 * @param InObject - The object we want to compare against the depot
	 * @param InPackagePath - The fullpath to the package
	 * @param InPackageName - The name of the package
	*/
	virtual void DiffAgainstDepot(UObject* InObject, const FString& InPackagePath, const FString& InPackageName) const = 0;

	/** Try and diff two assets using class-specific tool. Will do nothing if either asset is NULL, or they are not the same class. */
	virtual void DiffAssets(UObject* OldAsset, UObject* NewAsset, const struct FRevisionInfo& OldRevision, const struct FRevisionInfo& NewRevision) const = 0;

	/** Util for dumping an asset to a temporary text file. Returns absolute filename to temp file */
	virtual FString DumpAssetToTempFile(UObject* Asset) const = 0;

	/* Attempt to spawn Diff tool as external process 
	 *
	 * @param DiffCommand -		Command used to launch the diff tool
	 * @param OldTextFilename - File path to original file 
	 * @param NewTextFilename - File path to new file
	 * @param DiffArgs -		Any extra command line arguments (defaulted to empty)
	 *
	 * @return Returns true if the process has successfully been created.
	 */
	virtual bool CreateDiffProcess(const FString& DiffCommand, const FString& OldTextFilename, const FString& NewTextFilename, const FString& DiffArgs = FString("")) const = 0;

	/* Migrate packages to another game content folder */
	virtual void MigratePackages(const TArray<FName>& PackageNamesToMigrate) const = 0;

	/** Fix up references to the specified redirectors */
	virtual void FixupReferencers(const TArray<UObjectRedirector*>& Objects) const = 0;
};