/**
 * @file llfilteredwearablelist.cpp
 * @brief Functionality for showing filtered wearable flat list
 *
 * $LicenseInfo:firstyear=2010&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"
#include "llfilteredwearablelist.h"

// newview
#include "llinventoryfunctions.h"
#include "llinventoryitemslist.h"
#include "llinventorymodel.h"
#include "llviewerinventory.h"
#include "lltrans.h"


LLFilteredWearableListManager::LLFilteredWearableListManager(LLInventoryItemsList* list, LLInventoryCollectFunctor* collector)
: mWearableList(list)
, mCollector(collector)
, mListStale(true)
{
    llassert(mWearableList);
    gInventory.addObserver(this);
    gInventory.fetchDescendentsOf(gInventory.getRootFolderID());
}

LLFilteredWearableListManager::~LLFilteredWearableListManager()
{
    gInventory.removeObserver(this);
}

void LLFilteredWearableListManager::changed(U32 mask)
{
    if (LLInventoryObserver::CALLING_CARD == mask
            || LLInventoryObserver::GESTURE == mask
            || LLInventoryObserver::SORT == mask
            )
    {
        // skip non-related changes
        return;
    }

    if(!gInventory.isInventoryUsable())
    {
        return;
    }

    if (mWearableList->isInVisibleChain() || mWearableList->getForceRefresh())
    {
        // Todo: current populateList() is time consuming and changed() is time-sensitive,
        // either move from here or optimize
        populateList();
    }
    else
    {
        mListStale = true;
    }
}

void LLFilteredWearableListManager::setFilterCollector(LLInventoryCollectFunctor* collector)
{
    mCollector = collector;
    populateList();
}

void LLFilteredWearableListManager::populateIfNeeded()
{
    if (mListStale)
    {
        populateList();
    }
}

LLTrace::BlockTimerStatHandle FTM_MANAGER_LIST_POPULATION("Manager List Population");

void LLFilteredWearableListManager::populateList()
{
    LL_RECORD_BLOCK_TIME(FTM_MANAGER_LIST_POPULATION);

    LLInventoryModel::cat_array_t cat_array;
    LLInventoryModel::item_array_t item_array;

    if(mCollector)
    {
        // Too slow with large inventory!
        // Consider refactoring into "request once, append ids on changed()", since
        // Inventory observer provides ids of changed items this should be possible,
        // but will likely require modifying LLInventoryItemsList to avoid code-repeats.
        // Or make something like "gather everything and filter manually on idle"
        mListStale = false;
        gInventory.collectDescendentsIf(
                gInventory.getRootFolderID(),
                cat_array,
                item_array,
                LLInventoryModel::EXCLUDE_TRASH,
                *mCollector);
    }

    // Probably will also need to get items from Library (waiting for reply in EXT-6724).

    if (item_array.empty() && gInventory.isCategoryComplete(gInventory.getRootFolderID()))
    {
        mWearableList->setNoItemsCommentText(LLTrans::getString("NoneFound"));
    }

    mWearableList->refreshList(item_array);
}

void LLFilteredWearableListManager::holdProgress()
{
    mWearableList->setForceRefresh(false);
}

// EOF