/**
 * @file llgroupmgr.cpp
 * @brief LLGroupMgr class implementation
 *
 * $LicenseInfo:firstyear=2004&license=viewerlgpl$
 * 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
 * $/LicenseInfo$
 */

/**
 * Manager for aggregating all client knowledge for specific groups
 * Keeps a cache of group information.
 */

#include "llviewerprecompiledheaders.h"

#include "llgroupmgr.h"

#include <vector>
#include <algorithm>

#include "llappviewer.h"
#include "llagent.h"
#include "llavatarnamecache.h"
#include "llui.h"
#include "message.h"
#include "roles_constants.h"
#include "lltransactiontypes.h"
#include "llstatusbar.h"
#include "llviewerwindow.h"
#include "llpanelgroupcreate.h"
#include "llgroupactions.h"
#include "llnotificationsutil.h"
#include "lluictrlfactory.h"
#include "lltrans.h"
#include "llviewerregion.h"
#include <boost/regex.hpp>
#include "llcorehttputil.h"
#include "lluiusage.h"


#if LL_MSVC
#pragma warning(push)
// disable boost::lexical_cast warning
#pragma warning (disable:4702)
#endif

#include <boost/lexical_cast.hpp>

#if LL_MSVC
#pragma warning(pop)   // Restore all warnings to the previous state
#endif

const U32 MAX_CACHED_GROUPS = 20;

//
// LLRoleActionSet
//
LLRoleActionSet::LLRoleActionSet()
: mActionSetData(NULL)
{ }

LLRoleActionSet::~LLRoleActionSet()
{
    delete mActionSetData;
    std::for_each(mActions.begin(), mActions.end(), DeletePointer());
    mActions.clear();
}

//
// LLGroupMemberData
//

LLGroupMemberData::LLGroupMemberData(const LLUUID& id,
                                        S32 contribution,
                                        U64 agent_powers,
                                        const std::string& title,
                                        const std::string& online_status,
                                        bool is_owner) :
    mID(id),
    mContribution(contribution),
    mAgentPowers(agent_powers),
    mTitle(title),
    mOnlineStatus(online_status),
    mIsOwner(is_owner)
{
}

LLGroupMemberData::~LLGroupMemberData()
{
}

void LLGroupMemberData::addRole(const LLUUID& role, LLGroupRoleData* rd)
{
    mRolesList[role] = rd;
}

bool LLGroupMemberData::removeRole(const LLUUID& role)
{
    role_list_t::iterator it = mRolesList.find(role);

    if (it != mRolesList.end())
    {
        mRolesList.erase(it);
        return true;
    }

    return false;
}

//
// LLGroupRoleData
//

LLGroupRoleData::LLGroupRoleData(const LLUUID& role_id,
                                const std::string& role_name,
                                const std::string& role_title,
                                const std::string& role_desc,
                                const U64 role_powers,
                                const S32 member_count) :
    mRoleID(role_id),
    mMemberCount(member_count),
    mMembersNeedsSort(false)
{
    mRoleData.mRoleName = role_name;
    mRoleData.mRoleTitle = role_title;
    mRoleData.mRoleDescription = role_desc;
    mRoleData.mRolePowers = role_powers;
    mRoleData.mChangeType = RC_UPDATE_NONE;
}

LLGroupRoleData::LLGroupRoleData(const LLUUID& role_id,
                                LLRoleData role_data,
                                const S32 member_count) :
    mRoleID(role_id),
    mRoleData(role_data),
    mMemberCount(member_count),
    mMembersNeedsSort(false)
{

}

LLGroupRoleData::~LLGroupRoleData()
{
}

S32 LLGroupRoleData::getMembersInRole(uuid_vec_t members,
                                      bool needs_sort)
{
    if (mRoleID.isNull())
    {
        // This is the everyone role, just return the size of members,
        // because everyone is in the everyone role.
        return static_cast<S32>(members.size());
    }

    // Sort the members list, if needed.
    if (mMembersNeedsSort)
    {
        std::sort(mMemberIDs.begin(), mMemberIDs.end());
        mMembersNeedsSort = false;
    }
    if (needs_sort)
    {
        // Sort the members parameter.
        std::sort(members.begin(), members.end());
    }

    // Return the number of members in the intersection.
    auto max_size = llmin( members.size(), mMemberIDs.size() );
    uuid_vec_t in_role( max_size );
    uuid_vec_t::iterator in_role_end;
    in_role_end = std::set_intersection(mMemberIDs.begin(), mMemberIDs.end(),
                                    members.begin(), members.end(),
                                    in_role.begin());
    return (S32)(in_role_end - in_role.begin());
}

void LLGroupRoleData::addMember(const LLUUID& member)
{
    mMembersNeedsSort = true;
    mMemberIDs.push_back(member);
}

bool LLGroupRoleData::removeMember(const LLUUID& member)
{
    uuid_vec_t::iterator it = std::find(mMemberIDs.begin(),mMemberIDs.end(),member);

    if (it != mMemberIDs.end())
    {
        mMembersNeedsSort = true;
        mMemberIDs.erase(it);
        return true;
    }

    return false;
}

void LLGroupRoleData::clearMembers()
{
    mMembersNeedsSort = false;
    mMemberIDs.clear();
}


//
// LLGroupMgrGroupData
//

LLGroupMgrGroupData::LLGroupMgrGroupData(const LLUUID& id) :
    mID(id),
    mShowInList(true),
    mOpenEnrollment(false),
    mMembershipFee(0),
    mAllowPublish(false),
    mListInProfile(false),
    mMaturePublish(false),
    mChanged(false),
    mMemberCount(0),
    mRoleCount(0),
    mReceivedRoleMemberPairs(0),
    mMemberDataComplete(false),
    mRoleDataComplete(false),
    mRoleMemberDataComplete(false),
    mGroupPropertiesDataComplete(false),
    mPendingRoleMemberRequest(false),
    mAccessTime(0.0f),
    mPendingBanRequest(false)
{
    mMemberVersion.generate();
}

void LLGroupMgrGroupData::setAccessed()
{
    mAccessTime = (F32)LLFrameTimer::getTotalSeconds();
}

bool LLGroupMgrGroupData::getRoleData(const LLUUID& role_id, LLRoleData& role_data)
{
    role_data_map_t::const_iterator it;

    // Do we have changes for it?
    it = mRoleChanges.find(role_id);
    if (it != mRoleChanges.end())
    {
        if ((*it).second.mChangeType == RC_DELETE) return false;

        role_data = (*it).second;
        return true;
    }

    // Ok, no changes, hasn't been deleted, isn't a new role, just find the role.
    role_list_t::const_iterator rit = mRoles.find(role_id);
    if (rit != mRoles.end())
    {
        role_data = (*rit).second->getRoleData();
        return true;
    }

    // This role must not exist.
    return false;
}


void LLGroupMgrGroupData::setRoleData(const LLUUID& role_id, LLRoleData role_data)
{
    // If this is a newly created group, we need to change the data in the created list.
    role_data_map_t::iterator it;
    it = mRoleChanges.find(role_id);
    if (it != mRoleChanges.end())
    {
        if ((*it).second.mChangeType == RC_CREATE)
        {
            role_data.mChangeType = RC_CREATE;
            mRoleChanges[role_id] = role_data;
            return;
        }
        else if ((*it).second.mChangeType == RC_DELETE)
        {
            // Don't do anything for a role being deleted.
            return;
        }
    }

    // Not a new role, so put it in the changes list.
    LLRoleData old_role_data;
    role_list_t::iterator rit = mRoles.find(role_id);
    if (rit != mRoles.end())
    {
        bool data_change = ( ((*rit).second->mRoleData.mRoleDescription != role_data.mRoleDescription)
                            || ((*rit).second->mRoleData.mRoleName != role_data.mRoleName)
                            || ((*rit).second->mRoleData.mRoleTitle != role_data.mRoleTitle) );
        bool powers_change = ((*rit).second->mRoleData.mRolePowers != role_data.mRolePowers);

        if (!data_change && !powers_change)
        {
            // We are back to the original state, the changes have been 'undone' so take out the change.
            mRoleChanges.erase(role_id);
            return;
        }

        if (data_change && powers_change)
        {
            role_data.mChangeType = RC_UPDATE_ALL;
        }
        else if (data_change)
        {
            role_data.mChangeType = RC_UPDATE_DATA;
        }
        else
        {
            role_data.mChangeType = RC_UPDATE_POWERS;
        }

        mRoleChanges[role_id] = role_data;
    }
    else
    {
        LL_WARNS() << "Change being made to non-existant role " << role_id << LL_ENDL;
    }
}

bool LLGroupMgrGroupData::pendingRoleChanges()
{
    return (!mRoleChanges.empty());
}

// This is a no-op if the role has already been created.
void LLGroupMgrGroupData::createRole(const LLUUID& role_id, LLRoleData role_data)
{
    if (mRoleChanges.find(role_id) != mRoleChanges.end())
    {
        LL_WARNS() << "create role for existing role! " << role_id << LL_ENDL;
    }
    else
    {
        role_data.mChangeType = RC_CREATE;
        mRoleChanges[role_id] = role_data;
    }
}

void LLGroupMgrGroupData::deleteRole(const LLUUID& role_id)
{
    role_data_map_t::iterator it;

    // If this was a new role, just discard it.
    it = mRoleChanges.find(role_id);
    if (it != mRoleChanges.end()
        && (*it).second.mChangeType == RC_CREATE)
    {
        mRoleChanges.erase(it);
        return;
    }

    LLRoleData rd;
    rd.mChangeType = RC_DELETE;
    mRoleChanges[role_id] = rd;
}

void LLGroupMgrGroupData::addRolePower(const LLUUID &role_id, U64 power)
{
    LLRoleData rd;
    if (getRoleData(role_id,rd))
    {
        rd.mRolePowers |= power;
        setRoleData(role_id,rd);
    }
    else
    {
        LL_WARNS() << "addRolePower: no role data found for " << role_id << LL_ENDL;
    }
}

void LLGroupMgrGroupData::removeRolePower(const LLUUID &role_id, U64 power)
{
    LLRoleData rd;
    if (getRoleData(role_id,rd))
    {
        rd.mRolePowers &= ~power;
        setRoleData(role_id,rd);
    }
    else
    {
        LL_WARNS() << "removeRolePower: no role data found for " << role_id << LL_ENDL;
    }
}

U64 LLGroupMgrGroupData::getRolePowers(const LLUUID& role_id)
{
    LLRoleData rd;
    if (getRoleData(role_id,rd))
    {
        return rd.mRolePowers;
    }
    else
    {
        LL_WARNS() << "getRolePowers: no role data found for " << role_id << LL_ENDL;
        return GP_NO_POWERS;
    }
}

void LLGroupMgrGroupData::removeData()
{
    // Remove member data first, because removeRoleData will walk the member list
    removeMemberData();
    removeRoleData();
}

void LLGroupMgrGroupData::removeMemberData()
{
    for (member_list_t::iterator mi = mMembers.begin(); mi != mMembers.end(); ++mi)
    {
        delete mi->second;
    }
    mMembers.clear();
    mMemberDataComplete = false;
    mMemberVersion.generate();
}

void LLGroupMgrGroupData::removeRoleData()
{
    for (member_list_t::iterator mi = mMembers.begin(); mi != mMembers.end(); ++mi)
    {
        LLGroupMemberData* data = mi->second;
        if (data)
        {
            data->clearRoles();
        }
    }

    for (role_list_t::iterator ri = mRoles.begin(); ri != mRoles.end(); ++ri)
    {
        LLGroupRoleData* data = ri->second;
        delete data;
    }
    mRoles.clear();
    mReceivedRoleMemberPairs = 0;
    mRoleDataComplete = false;
    mRoleMemberDataComplete= false;
}

void LLGroupMgrGroupData::removeRoleMemberData()
{
    for (member_list_t::iterator mi = mMembers.begin(); mi != mMembers.end(); ++mi)
    {
        LLGroupMemberData* data = mi->second;
        if (data)
        {
            data->clearRoles();
        }
    }

    for (role_list_t::iterator ri = mRoles.begin(); ri != mRoles.end(); ++ri)
    {
        LLGroupRoleData* data = ri->second;
        if (data)
        {
            data->clearMembers();
        }
    }

    mReceivedRoleMemberPairs = 0;
    mRoleMemberDataComplete= false;
}

LLGroupMgrGroupData::~LLGroupMgrGroupData()
{
    removeData();
}

bool LLGroupMgrGroupData::changeRoleMember(const LLUUID& role_id,
                                           const LLUUID& member_id,
                                           LLRoleMemberChangeType rmc)
{
    role_list_t::iterator ri = mRoles.find(role_id);
    member_list_t::iterator mi = mMembers.find(member_id);

    if (ri == mRoles.end()
        || mi == mMembers.end() )
    {
        if (ri == mRoles.end()) LL_WARNS() << "LLGroupMgrGroupData::changeRoleMember couldn't find role " << role_id << LL_ENDL;
        if (mi == mMembers.end()) LL_WARNS() << "LLGroupMgrGroupData::changeRoleMember couldn't find member " << member_id << LL_ENDL;
        return false;
    }

    LLGroupRoleData* grd = ri->second;
    LLGroupMemberData* gmd = mi->second;

    if (!grd || !gmd)
    {
        LL_WARNS() << "LLGroupMgrGroupData::changeRoleMember couldn't get member or role data." << LL_ENDL;
        return false;
    }

    if (RMC_ADD == rmc)
    {
        LL_INFOS() << " adding member to role." << LL_ENDL;
        grd->addMember(member_id);
        gmd->addRole(role_id,grd);

        //TODO move this into addrole function
        //see if they added someone to the owner role and update isOwner
        gmd->mIsOwner = (role_id == mOwnerRole) ? true : gmd->mIsOwner;
    }
    else if (RMC_REMOVE == rmc)
    {
        LL_INFOS() << " removing member from role." << LL_ENDL;
        grd->removeMember(member_id);
        gmd->removeRole(role_id);

        //see if they removed someone from the owner role and update isOwner
        gmd->mIsOwner = (role_id == mOwnerRole) ? false : gmd->mIsOwner;
    }

    lluuid_pair role_member;
    role_member.first = role_id;
    role_member.second = member_id;

    change_map_t::iterator it = mRoleMemberChanges.find(role_member);
    if (it != mRoleMemberChanges.end())
    {
        // There was already a role change for this role_member
        if (it->second.mChange == rmc)
        {
            // Already recorded this change?  Weird.
            LL_INFOS() << "Received duplicate change for "
                    << " role: " << role_id << " member " << member_id
                    << " change " << (rmc == RMC_ADD ? "ADD" : "REMOVE") << LL_ENDL;
        }
        else
        {
            // The only two operations (add and remove) currently cancel each other out
            // If that changes this will need more logic
            if (rmc == RMC_NONE)
            {
                LL_WARNS() << "changeRoleMember: existing entry with 'RMC_NONE' change! This shouldn't happen." << LL_ENDL;
                LLRoleMemberChange rc(role_id,member_id,rmc);
                mRoleMemberChanges[role_member] = rc;
            }
            else
            {
                mRoleMemberChanges.erase(it);
            }
        }
    }
    else
    {
        LLRoleMemberChange rc(role_id,member_id,rmc);
        mRoleMemberChanges[role_member] = rc;
    }

    recalcAgentPowers(member_id);

    mChanged = true;
    return true;
}

void LLGroupMgrGroupData::recalcAllAgentPowers()
{
    LLGroupMemberData* gmd;

    for (member_list_t::iterator mit = mMembers.begin();
         mit != mMembers.end(); ++mit)
    {
        gmd = mit->second;
        if (!gmd) continue;

        gmd->mAgentPowers = 0;
        for (LLGroupMemberData::role_list_t::iterator it = gmd->mRolesList.begin();
             it != gmd->mRolesList.end(); ++it)
        {
            LLGroupRoleData* grd = (*it).second;
            if (!grd) continue;

            gmd->mAgentPowers |= grd->mRoleData.mRolePowers;
        }
    }
}

void LLGroupMgrGroupData::recalcAgentPowers(const LLUUID& agent_id)
{
    member_list_t::iterator mi = mMembers.find(agent_id);
    if (mi == mMembers.end()) return;

    LLGroupMemberData* gmd = mi->second;

    if (!gmd) return;

    gmd->mAgentPowers = 0;
    for (LLGroupMemberData::role_list_t::iterator it = gmd->mRolesList.begin();
         it != gmd->mRolesList.end(); ++it)
    {
        LLGroupRoleData* grd = (*it).second;
        if (!grd) continue;

        gmd->mAgentPowers |= grd->mRoleData.mRolePowers;
    }
}

bool LLGroupMgrGroupData::isSingleMemberNotOwner()
{
    return mMembers.size() == 1 && !mMembers.begin()->second->isOwner();
}

bool packRoleUpdateMessageBlock(LLMessageSystem* msg,
                                const LLUUID& group_id,
                                const LLUUID& role_id,
                                const LLRoleData& role_data,
                                bool start_message)
{
    if (start_message)
    {
        msg->newMessage("GroupRoleUpdate");
        msg->nextBlock("AgentData");
        msg->addUUID("AgentID",gAgent.getID());
        msg->addUUID("SessionID",gAgent.getSessionID());
        msg->addUUID("GroupID",group_id);
        start_message = false;
    }

    msg->nextBlock("RoleData");
    msg->addUUID("RoleID",role_id);
    msg->addString("Name", role_data.mRoleName);
    msg->addString("Description", role_data.mRoleDescription);
    msg->addString("Title", role_data.mRoleTitle);
    msg->addU64("Powers", role_data.mRolePowers);
    msg->addU8("UpdateType", (U8)role_data.mChangeType);

    if (msg->isSendFullFast())
    {
        gAgent.sendReliableMessage();
        start_message = true;
    }

    return start_message;
}

void LLGroupMgrGroupData::sendRoleChanges()
{
    // Commit changes locally
    LLGroupRoleData* grd;
    role_list_t::iterator role_it;
    LLMessageSystem* msg = gMessageSystem;
    bool start_message = true;

    bool need_role_cleanup = false;
    bool need_role_data = false;
    bool need_power_recalc = false;

    // Apply all changes
    for (role_data_map_t::iterator iter = mRoleChanges.begin();
         iter != mRoleChanges.end(); )
    {
        role_data_map_t::iterator it = iter++; // safely incrament iter
        const LLUUID& role_id = (*it).first;
        const LLRoleData& role_data = (*it).second;

        // Commit to local data set
        role_it = mRoles.find((*it).first);
        if ( (mRoles.end() == role_it
                && RC_CREATE != role_data.mChangeType)
            || (mRoles.end() != role_it
                && RC_CREATE == role_data.mChangeType))
        {
            continue;
        }

        // NOTE: role_it is valid EXCEPT for the RC_CREATE case
        switch (role_data.mChangeType)
        {
            case RC_CREATE:
            {
                // NOTE: role_it is NOT valid in this case
                grd = new LLGroupRoleData(role_id, role_data, 0);
                mRoles[role_id] = grd;
                need_role_data = true;
                break;
            }
            case RC_DELETE:
            {
                LLGroupRoleData* group_role_data = (*role_it).second;
                delete group_role_data;
                mRoles.erase(role_it);
                need_role_cleanup = true;
                need_power_recalc = true;
                break;
            }
            case RC_UPDATE_ALL:
                // fall through
            case RC_UPDATE_POWERS:
                need_power_recalc = true;
                // fall through
            case RC_UPDATE_DATA:
                // fall through
            default:
            {
                LLGroupRoleData* group_role_data = (*role_it).second;
                group_role_data->setRoleData(role_data); // NOTE! might modify mRoleChanges!
                break;
            }
        }

        // Update dataserver
        start_message = packRoleUpdateMessageBlock(msg,getID(),role_id,role_data,start_message);
    }

    if (!start_message)
    {
        gAgent.sendReliableMessage();
    }

    // If we delete a role then all the role-member pairs are invalid!
    if (need_role_cleanup)
    {
        removeRoleMemberData();
    }

    // If we create a new role, then we need to re-fetch all the role data.
    if (need_role_data)
    {
        LLGroupMgr::getInstance()->sendGroupRoleDataRequest(getID());
    }

    // Clean up change lists
    mRoleChanges.clear();

    // Recalculate all the agent powers because role powers have now changed.
    if (need_power_recalc)
    {
        recalcAllAgentPowers();
    }
}

void LLGroupMgrGroupData::cancelRoleChanges()
{
    // Clear out all changes!
    mRoleChanges.clear();
}

void LLGroupMgrGroupData::createBanEntry(const LLUUID& ban_id, const LLGroupBanData& ban_data)
{
    mBanList[ban_id] = ban_data;
}

void LLGroupMgrGroupData::removeBanEntry(const LLUUID& ban_id)
{
    mBanList.erase(ban_id);
}

void LLGroupMgrGroupData::banMemberById(const LLUUID& participant_uuid)
{
    if (!mMemberDataComplete ||
        !mRoleDataComplete ||
        !(mRoleMemberDataComplete && mMembers.size()))
    {
        LL_WARNS() << "No Role-Member data yet, setting ban request to pending." << LL_ENDL;
        mPendingBanRequest = true;
        mPendingBanMemberID = participant_uuid;

        if (!mMemberDataComplete || !mMembers.size())
        {
            LLGroupMgr::getInstance()->sendCapGroupMembersRequest(mID);
        }

        if (!mRoleDataComplete)
        {
            LLGroupMgr::getInstance()->sendGroupRoleDataRequest(mID);
        }

        return;
    }

    LLGroupMgrGroupData::member_list_t::iterator mi = mMembers.find((participant_uuid));
    if (mi == mMembers.end())
    {
        if (!mPendingBanRequest)
        {
            mPendingBanRequest = true;
            mPendingBanMemberID = participant_uuid;
            LLGroupMgr::getInstance()->sendCapGroupMembersRequest(mID); // member isn't in members list, request reloading
        }
        else
        {
            mPendingBanRequest = false;
        }

        return;
    }

    mPendingBanRequest = false;

    LLGroupMemberData* member_data = mi->second;
    if (member_data && member_data->isInRole(mOwnerRole))
    {
        return; // can't ban group owner
    }

    std::vector<LLUUID> ids;
    ids.push_back(participant_uuid);

    LLGroupBanData ban_data;
    createBanEntry(participant_uuid, ban_data);
    LLGroupMgr::getInstance()->sendGroupBanRequest(LLGroupMgr::REQUEST_POST, mID, LLGroupMgr::BAN_CREATE, ids);
    LLGroupMgr::getInstance()->sendGroupMemberEjects(mID, ids);
    LLGroupMgr::getInstance()->sendGroupMembersRequest(mID);
    LLSD args;
    LLAvatarName av_name;
    LLAvatarNameCache::get(participant_uuid, &av_name);
    args["AVATAR_NAME"] = av_name.getUserName();
    args["GROUP_NAME"] = mName;
    LLNotifications::instance().add(LLNotification::Params("EjectAvatarFromGroup").substitutions(args));
}

//
// LLGroupMgr
//

LLGroupMgr::LLGroupMgr()
{
}

LLGroupMgr::~LLGroupMgr()
{
    clearGroups();
}

void LLGroupMgr::clearGroups()
{
    std::for_each(mRoleActionSets.begin(), mRoleActionSets.end(), DeletePointer());
    mRoleActionSets.clear();
    std::for_each(mGroups.begin(), mGroups.end(), DeletePairedPointer());
    mGroups.clear();
    mObservers.clear();
}

void LLGroupMgr::clearGroupData(const LLUUID& group_id)
{
    group_map_t::iterator iter = mGroups.find(group_id);
    if (iter != mGroups.end())
    {
        delete (*iter).second;
        mGroups.erase(iter);
    }
}

void LLGroupMgr::addObserver(LLGroupMgrObserver* observer)
{
    if( observer->getID() != LLUUID::null )
        mObservers.insert(std::pair<LLUUID, LLGroupMgrObserver*>(observer->getID(), observer));
}

void LLGroupMgr::addObserver(const LLUUID& group_id, LLParticularGroupObserver* observer)
{
    if(group_id.notNull() && observer)
    {
        mParticularObservers[group_id].insert(observer);
    }
}

void LLGroupMgr::removeObserver(LLGroupMgrObserver* observer)
{
    if (!observer)
    {
        return;
    }
    observer_multimap_t::iterator it;
    it = mObservers.find(observer->getID());
    while (it != mObservers.end())
    {
        if (it->second == observer)
        {
            mObservers.erase(it);
            break;
        }
        else
        {
            ++it;
        }
    }
}

void LLGroupMgr::removeObserver(const LLUUID& group_id, LLParticularGroupObserver* observer)
{
    if(group_id.isNull() || !observer)
    {
        return;
    }

    observer_map_t::iterator obs_it = mParticularObservers.find(group_id);
    if(obs_it == mParticularObservers.end())
        return;

    obs_it->second.erase(observer);

    if (obs_it->second.size() == 0)
        mParticularObservers.erase(obs_it);
}

LLGroupMgrGroupData* LLGroupMgr::getGroupData(const LLUUID& id)
{
    group_map_t::iterator gi = mGroups.find(id);

    if (gi != mGroups.end())
    {
        return gi->second;
    }
    return NULL;
}

// Helper function for LLGroupMgr::processGroupMembersReply
// This reformats date strings from MM/DD/YYYY to YYYY/MM/DD ( e.g. 1/27/2008 -> 2008/1/27 )
// so that the sorter can sort by year before month before day.
static void formatDateString(std::string &date_string)
{
    using namespace boost;
    cmatch result;
    const regex expression("([0-9]{1,2})/([0-9]{1,2})/([0-9]{4})");
    if (regex_match(date_string.c_str(), result, expression))
    {
        // convert matches to integers so that we can pad them with zeroes on Linux
        S32 year    = boost::lexical_cast<S32>(result[3]);
        S32 month   = boost::lexical_cast<S32>(result[1]);
        S32 day     = boost::lexical_cast<S32>(result[2]);

        // ISO 8601 date format
        date_string = llformat("%04d/%02d/%02d", year, month, day);
    }
}

// static
void LLGroupMgr::processGroupMembersReply(LLMessageSystem* msg, void** data)
{
    LL_PROFILE_ZONE_SCOPED;

    LL_DEBUGS("GrpMgr") << "LLGroupMgr::processGroupMembersReply" << LL_ENDL;
    LLUUID agent_id;
    msg->getUUIDFast(_PREHASH_AgentData, _PREHASH_AgentID, agent_id );
    if (gAgent.getID() != agent_id)
    {
        LL_WARNS() << "Got group members reply for another agent!" << LL_ENDL;
        return;
    }

    LLUUID group_id;
    msg->getUUIDFast(_PREHASH_GroupData, _PREHASH_GroupID, group_id );

    LLUUID request_id;
    msg->getUUIDFast(_PREHASH_GroupData, _PREHASH_RequestID, request_id);

    LLGroupMgrGroupData* group_datap = LLGroupMgr::getInstance()->getGroupData(group_id);
    if (!group_datap || (group_datap->mMemberRequestID != request_id))
    {
        LL_WARNS() << "Received incorrect (stale?) group or request id" << LL_ENDL;
        return;
    }

    msg->getS32Fast(_PREHASH_GroupData, _PREHASH_MemberCount, group_datap->mMemberCount);

    if (group_datap->mMemberCount > 0)
    {
        S32 contribution = 0;
        std::string online_status;
        std::string title;
        U64 agent_powers = 0;
        bool is_owner = false;

        S32 num_members = msg->getNumberOfBlocksFast(_PREHASH_MemberData);
        for (S32 i = 0; i < num_members; i++)
        {
            LLUUID member_id;

            msg->getUUIDFast(_PREHASH_MemberData, _PREHASH_AgentID, member_id, i);
            msg->getS32Fast(_PREHASH_MemberData, _PREHASH_Contribution, contribution, i);
            msg->getU64Fast(_PREHASH_MemberData, _PREHASH_AgentPowers, agent_powers, i);
            msg->getStringFast(_PREHASH_MemberData, _PREHASH_OnlineStatus, online_status, i);
            msg->getStringFast(_PREHASH_MemberData, _PREHASH_Title, title, i);
            msg->getBOOLFast(_PREHASH_MemberData, _PREHASH_IsOwner, is_owner, i);

            if (member_id.notNull())
            {
                if (online_status == "Online")
                {
                    static std::string localized_online(LLTrans::getString("group_member_status_online"));
                    online_status = localized_online;
                }
                else
                {
                    formatDateString(online_status); // reformat for sorting, e.g. 12/25/2008 -> 2008/12/25
                }

                //LL_INFOS() << "Member " << member_id << " has powers " << std::hex << agent_powers << std::dec << LL_ENDL;
                LLGroupMemberData* newdata = new LLGroupMemberData(member_id,
                                                                    contribution,
                                                                    agent_powers,
                                                                    title,
                                                                    online_status,
                                                                    is_owner);
#if LL_DEBUG
                LLGroupMgrGroupData::member_list_t::iterator mit = group_datap->mMembers.find(member_id);
                if (mit != group_datap->mMembers.end())
                {
                    LL_INFOS() << " *** Received duplicate member data for agent " << member_id << LL_ENDL;
                }
#endif
                group_datap->mMembers[member_id] = newdata;
            }
            else
            {
                LL_INFOS() << "Received null group member data." << LL_ENDL;
            }
        }

        //if group members are loaded while titles are missing, load the titles.
        if(group_datap->mTitles.size() < 1)
        {
            LLGroupMgr::getInstance()->sendGroupTitlesRequest(group_id);
        }
    }

    group_datap->mMemberVersion.generate();

    if (group_datap->mMembers.size() == (U32)group_datap->mMemberCount)
    {
        group_datap->mMemberDataComplete = true;
        group_datap->mMemberRequestID.setNull();
        // We don't want to make role-member data requests until we have all the members
        if (group_datap->mPendingRoleMemberRequest)
        {
            group_datap->mPendingRoleMemberRequest = false;
            LLGroupMgr::getInstance()->sendGroupRoleMembersRequest(group_datap->mID);
        }
    }

    group_datap->mChanged = true;
    LLGroupMgr::getInstance()->notifyObservers(GC_MEMBER_DATA);
}

//static
void LLGroupMgr::processGroupPropertiesReply(LLMessageSystem* msg, void** data)
{
    LL_PROFILE_ZONE_SCOPED;

    LL_DEBUGS("GrpMgr") << "LLGroupMgr::processGroupPropertiesReply" << LL_ENDL;
    if (!msg)
    {
        LL_ERRS() << "Can't access the messaging system" << LL_ENDL;
        return;
    }
    LLUUID agent_id;
    msg->getUUIDFast(_PREHASH_AgentData, _PREHASH_AgentID, agent_id );
    if (gAgent.getID() != agent_id)
    {
        LL_WARNS() << "Got group properties reply for another agent!" << LL_ENDL;
        return;
    }

    LLUUID group_id;
    std::string name;
    std::string charter;
    bool    show_in_list = false;
    LLUUID  founder_id;
    U64     powers_mask = GP_NO_POWERS;
    S32     money = 0;
    std::string member_title;
    LLUUID  insignia_id;
    LLUUID  owner_role;
    U32     membership_fee = 0;
    bool    open_enrollment = false;
    S32     num_group_members = 0;
    S32     num_group_roles = 0;
    bool    allow_publish = false;
    bool    mature = false;

    msg->getUUIDFast(_PREHASH_GroupData, _PREHASH_GroupID, group_id );
    msg->getUUIDFast(_PREHASH_GroupData, _PREHASH_FounderID, founder_id);
    msg->getStringFast(_PREHASH_GroupData, _PREHASH_Name, name );
    msg->getStringFast(_PREHASH_GroupData, _PREHASH_Charter, charter );
    msg->getBOOLFast(_PREHASH_GroupData, _PREHASH_ShowInList, show_in_list );
    msg->getStringFast(_PREHASH_GroupData, _PREHASH_MemberTitle, member_title );
    msg->getUUIDFast(_PREHASH_GroupData, _PREHASH_InsigniaID, insignia_id );
    msg->getU64Fast(_PREHASH_GroupData, _PREHASH_PowersMask, powers_mask );
    msg->getU32Fast(_PREHASH_GroupData, _PREHASH_MembershipFee, membership_fee );
    msg->getBOOLFast(_PREHASH_GroupData, _PREHASH_OpenEnrollment, open_enrollment );
    msg->getS32Fast(_PREHASH_GroupData, _PREHASH_GroupMembershipCount, num_group_members);
    msg->getS32(_PREHASH_GroupData, "GroupRolesCount", num_group_roles);
    msg->getS32Fast(_PREHASH_GroupData, _PREHASH_Money, money);
    msg->getBOOL("GroupData", "AllowPublish", allow_publish);
    msg->getBOOL("GroupData", "MaturePublish", mature);
    msg->getUUID(_PREHASH_GroupData, "OwnerRole", owner_role);

    LLGroupMgrGroupData* group_datap = LLGroupMgr::getInstance()->createGroupData(group_id);

    group_datap->mName = name;
    group_datap->mCharter = charter;
    group_datap->mShowInList = show_in_list;
    group_datap->mInsigniaID = insignia_id;
    group_datap->mFounderID = founder_id;
    group_datap->mMembershipFee = membership_fee;
    group_datap->mOpenEnrollment = open_enrollment;
    group_datap->mAllowPublish = allow_publish;
    group_datap->mMaturePublish = mature;
    group_datap->mOwnerRole = owner_role;
    group_datap->mMemberCount = num_group_members;
    group_datap->mRoleCount = num_group_roles + 1; // Add the everyone role.

    group_datap->mGroupPropertiesDataComplete = true;
    group_datap->mChanged = true;

    properties_request_map_t::iterator request = LLGroupMgr::getInstance()->mPropRequests.find(group_id);
    if (request != LLGroupMgr::getInstance()->mPropRequests.end())
    {
        LLGroupMgr::getInstance()->mPropRequests.erase(request);
    }
    else
    {
        LL_DEBUGS("GrpMgr") << "GroupPropertyResponse received with no pending request. Response was slow." << LL_ENDL;
    }
    LLGroupMgr::getInstance()->notifyObservers(GC_PROPERTIES);
}

// static
void LLGroupMgr::processGroupRoleDataReply(LLMessageSystem* msg, void** data)
{
    LL_PROFILE_ZONE_SCOPED;

    LL_DEBUGS("GrpMgr") << "LLGroupMgr::processGroupRoleDataReply" << LL_ENDL;
    LLUUID agent_id;
    msg->getUUIDFast(_PREHASH_AgentData, _PREHASH_AgentID, agent_id );
    if (gAgent.getID() != agent_id)
    {
        LL_WARNS() << "Got group role data reply for another agent!" << LL_ENDL;
        return;
    }

    LLUUID group_id;
    msg->getUUIDFast(_PREHASH_GroupData, _PREHASH_GroupID, group_id );

    LLUUID request_id;
    msg->getUUIDFast(_PREHASH_GroupData, _PREHASH_RequestID, request_id);

    LLGroupMgrGroupData* group_datap = LLGroupMgr::getInstance()->getGroupData(group_id);
    if (!group_datap || (group_datap->mRoleDataRequestID != request_id))
    {
        LL_WARNS() << "processGroupPropertiesReply: Received incorrect (stale?) group or request id" << LL_ENDL;
        return;
    }

    msg->getS32(_PREHASH_GroupData, "RoleCount", group_datap->mRoleCount );

    std::string name;
    std::string title;
    std::string desc;
    U64     powers = 0;
    U32     member_count = 0;
    LLUUID role_id;

    U32 num_blocks = msg->getNumberOfBlocks("RoleData");
    U32 i = 0;
    for (i=0; i< num_blocks; ++i)
    {
        msg->getUUID("RoleData", "RoleID", role_id, i );

        msg->getString("RoleData","Name",name,i);
        msg->getString("RoleData","Title",title,i);
        msg->getString("RoleData","Description",desc,i);
        msg->getU64("RoleData","Powers",powers,i);
        msg->getU32("RoleData","Members",member_count,i);

        //there are 3 predifined roles - Owners, Officers, Everyone
        //there names are defined in lldatagroups.cpp
        //lets change names from server to localized strings
        if(name == "Everyone")
        {
            name = LLTrans::getString("group_role_everyone");
        }
        else if(name == "Officers")
        {
            name = LLTrans::getString("group_role_officers");
        }
        else if(name == "Owners")
        {
            name = LLTrans::getString("group_role_owners");
        }



        LL_DEBUGS("GrpMgr") << "Adding role data: " << name << " {" << role_id << "}" << LL_ENDL;
        LLGroupRoleData* rd = new LLGroupRoleData(role_id,name,title,desc,powers,member_count);
        group_datap->mRoles[role_id] = rd;
    }

    if (group_datap->mRoles.size() == (U32)group_datap->mRoleCount)
    {
        group_datap->mRoleDataComplete = true;
        group_datap->mRoleDataRequestID.setNull();
        // We don't want to make role-member data requests until we have all the role data
        if (group_datap->mPendingRoleMemberRequest)
        {
            group_datap->mPendingRoleMemberRequest = false;
            LLGroupMgr::getInstance()->sendGroupRoleMembersRequest(group_datap->mID);
        }
    }

    group_datap->mChanged = true;
    LLGroupMgr::getInstance()->notifyObservers(GC_ROLE_DATA);
}

// static
void LLGroupMgr::processGroupRoleMembersReply(LLMessageSystem* msg, void** data)
{
    LL_PROFILE_ZONE_SCOPED;

    LL_DEBUGS("GrpMgr") << "LLGroupMgr::processGroupRoleMembersReply" << LL_ENDL;
    LLUUID agent_id;
    msg->getUUIDFast(_PREHASH_AgentData, _PREHASH_AgentID, agent_id );
    if (gAgent.getID() != agent_id)
    {
        LL_WARNS() << "Got group role members reply for another agent!" << LL_ENDL;
        return;
    }

    LLUUID request_id;
    msg->getUUIDFast(_PREHASH_AgentData, _PREHASH_RequestID, request_id);

    LLUUID group_id;
    msg->getUUIDFast(_PREHASH_AgentData, _PREHASH_GroupID, group_id );

    U32 total_pairs;
    msg->getU32(_PREHASH_AgentData, "TotalPairs", total_pairs);

    LLGroupMgrGroupData* group_datap = LLGroupMgr::getInstance()->getGroupData(group_id);
    if (!group_datap || (group_datap->mRoleMembersRequestID != request_id))
    {
        LL_WARNS() << "processGroupRoleMembersReply: Received incorrect (stale?) group or request id" << LL_ENDL;
        return;
    }

    U32 num_blocks = msg->getNumberOfBlocks("MemberData");
    U32 i;
    LLUUID member_id;
    LLUUID role_id;
    LLGroupRoleData* rd = NULL;
    LLGroupMemberData* md = NULL;

    LLGroupMgrGroupData::role_list_t::iterator ri;
    LLGroupMgrGroupData::member_list_t::iterator mi;

    // If total_pairs == 0, there are no members in any custom roles.
    if (total_pairs > 0)
    {
        for (i = 0;i < num_blocks; ++i)
        {
            msg->getUUID("MemberData","RoleID",role_id,i);
            msg->getUUID("MemberData","MemberID",member_id,i);

            if (role_id.notNull() && member_id.notNull() )
            {
                rd = NULL;
                ri = group_datap->mRoles.find(role_id);
                if (ri != group_datap->mRoles.end())
                {
                    rd = ri->second;
                }

                md = NULL;
                mi = group_datap->mMembers.find(member_id);
                if (mi != group_datap->mMembers.end())
                {
                    md = mi->second;
                }

                if (rd && md)
                {
                    LL_DEBUGS("GrpMgr") << "Adding role-member pair: " << role_id << ", " << member_id << LL_ENDL;
                    rd->addMember(member_id);
                    md->addRole(role_id,rd);
                }
                else
                {
                    if (!rd) LL_WARNS() << "Received role data for unknown role " << role_id << " in group " << group_id << LL_ENDL;
                    if (!md) LL_WARNS() << "Received role data for unknown member " << member_id << " in group " << group_id << LL_ENDL;
                }
            }
        }

        group_datap->mReceivedRoleMemberPairs += num_blocks;
    }

    if (group_datap->mReceivedRoleMemberPairs == total_pairs)
    {
        // Add role data for the 'everyone' role to all members
        LLGroupRoleData* everyone = group_datap->mRoles[LLUUID::null];
        if (!everyone)
        {
            LL_WARNS() << "Everyone role not found!" << LL_ENDL;
        }
        else
        {
            for (LLGroupMgrGroupData::member_list_t::iterator mi = group_datap->mMembers.begin();
                 mi != group_datap->mMembers.end(); ++mi)
            {
                LLGroupMemberData* data = mi->second;
                if (data)
                {
                    data->addRole(LLUUID::null,everyone);
                }
            }
        }

        group_datap->mRoleMemberDataComplete= true;
        group_datap->mRoleMembersRequestID.setNull();
    }

    group_datap->mChanged = true;
    LLGroupMgr::getInstance()->notifyObservers(GC_ROLE_MEMBER_DATA);

    if (group_datap->mPendingBanRequest)
    {
        group_datap->banMemberById(group_datap->mPendingBanMemberID);
    }
}

// static
void LLGroupMgr::processGroupTitlesReply(LLMessageSystem* msg, void** data)
{
    LL_DEBUGS("GrpMgr") << "LLGroupMgr::processGroupTitlesReply" << LL_ENDL;
    LLUUID agent_id;
    msg->getUUIDFast(_PREHASH_AgentData, _PREHASH_AgentID, agent_id );
    if (gAgent.getID() != agent_id)
    {
        LL_WARNS() << "Got group properties reply for another agent!" << LL_ENDL;
        return;
    }

    LLUUID group_id;
    msg->getUUIDFast(_PREHASH_AgentData, _PREHASH_GroupID, group_id );
    LLUUID request_id;
    msg->getUUIDFast(_PREHASH_AgentData, _PREHASH_RequestID, request_id);

    LLGroupMgrGroupData* group_datap = LLGroupMgr::getInstance()->getGroupData(group_id);
    if (!group_datap || (group_datap->mTitlesRequestID != request_id))
    {
        LL_WARNS() << "processGroupTitlesReply: Received incorrect (stale?) group" << LL_ENDL;
        return;
    }

    LLGroupTitle title;

    S32 i = 0;
    S32 blocks = msg->getNumberOfBlocksFast(_PREHASH_GroupData);
    for (i=0; i<blocks; ++i)
    {
        msg->getString("GroupData","Title",title.mTitle,i);
        msg->getUUID("GroupData","RoleID",title.mRoleID,i);
        msg->getBOOL("GroupData","Selected",title.mSelected,i);

        if (!title.mTitle.empty())
        {
            LL_DEBUGS("GrpMgr") << "LLGroupMgr adding title: " << title.mTitle << ", " << title.mRoleID << ", " << (title.mSelected ? 'Y' : 'N') << LL_ENDL;
            group_datap->mTitles.push_back(title);
        }
    }

    group_datap->mChanged = true;
    LLGroupMgr::getInstance()->notifyObservers(GC_TITLES);
}

// static
void LLGroupMgr::processEjectGroupMemberReply(LLMessageSystem* msg, void ** data)
{
    LL_DEBUGS("GrpMgr") << "processEjectGroupMemberReply" << LL_ENDL;
    LLUUID group_id;
    msg->getUUIDFast(_PREHASH_GroupData, _PREHASH_GroupID, group_id);
    bool success;
    msg->getBOOLFast(_PREHASH_EjectData, _PREHASH_Success, success);

    // If we had a failure, the group panel needs to be updated.
    if (!success)
    {
        LLGroupActions::refresh(group_id);
    }
}

// static
void LLGroupMgr::processJoinGroupReply(LLMessageSystem* msg, void ** data)
{
    LL_DEBUGS("GrpMgr") << "processJoinGroupReply" << LL_ENDL;
    LLUUID group_id;
    bool success;
    msg->getUUIDFast(_PREHASH_GroupData, _PREHASH_GroupID, group_id);
    msg->getBOOLFast(_PREHASH_GroupData, _PREHASH_Success, success);

    if (success)
    {
        // refresh all group information
        gAgent.sendAgentDataUpdateRequest();

        LLGroupMgr::getInstance()->clearGroupData(group_id);
        // refresh the floater for this group, if any.
        LLGroupActions::refresh(group_id);
    }
}

// static
void LLGroupMgr::processLeaveGroupReply(LLMessageSystem* msg, void ** data)
{
    LL_DEBUGS("GrpMgr") << "processLeaveGroupReply" << LL_ENDL;
    LLUUID group_id;
    bool success;
    msg->getUUIDFast(_PREHASH_GroupData, _PREHASH_GroupID, group_id);
    msg->getBOOLFast(_PREHASH_GroupData, _PREHASH_Success, success);

    if (success)
    {
        // refresh all group information
        gAgent.sendAgentDataUpdateRequest();

        LLGroupMgr::getInstance()->clearGroupData(group_id);
        // close the floater for this group, if any.
        LLGroupActions::closeGroup(group_id);
    }
}

// static
void LLGroupMgr::processCreateGroupReply(LLMessageSystem* msg, void ** data)
{
    LLUUID group_id;
    bool success;
    std::string message;

    msg->getUUIDFast(_PREHASH_ReplyData, _PREHASH_GroupID, group_id );

    msg->getBOOLFast(_PREHASH_ReplyData, _PREHASH_Success,  success );
    msg->getStringFast(_PREHASH_ReplyData, _PREHASH_Message, message );

    if (success)
    {
        // refresh all group information
        gAgent.sendAgentDataUpdateRequest();

        // HACK! We haven't gotten the agent group update yet, so ... um ... fake it.
        // This is so when we go to modify the group we will be able to do so.
        // This isn't actually too bad because real data will come down in 2 or 3 miliseconds and replace this.
        LLGroupData gd;
        gd.mAcceptNotices = true;
        gd.mListInProfile = true;
        gd.mContribution = 0;
        gd.mID = group_id;
        gd.mName = "new group";
        gd.mPowers = GP_ALL_POWERS;

        gAgent.mGroups.push_back(gd);

        LLPanelGroupCreate::refreshCreatedGroup(group_id);
        //FIXME
        //LLFloaterGroupInfo::closeCreateGroup();
        //LLFloaterGroupInfo::showFromUUID(group_id,"roles_tab");
    }
    else
    {
        // *TODO: Translate
        LLSD args;
        args["MESSAGE"] = message;
        LLNotificationsUtil::add("UnableToCreateGroup", args);
    }
}

LLGroupMgrGroupData* LLGroupMgr::createGroupData(const LLUUID& id)
{
    LLGroupMgrGroupData* group_datap = NULL;

    group_map_t::iterator existing_group = LLGroupMgr::getInstance()->mGroups.find(id);
    if (existing_group == LLGroupMgr::getInstance()->mGroups.end())
    {
        group_datap = new LLGroupMgrGroupData(id);
        LLGroupMgr::getInstance()->addGroup(group_datap);
    }
    else
    {
        group_datap = existing_group->second;
    }

    if (group_datap)
    {
        group_datap->setAccessed();
    }

    return group_datap;
}

bool LLGroupMgr::hasPendingPropertyRequest(const LLUUID & id)
{
    properties_request_map_t::iterator existing_req = LLGroupMgr::getInstance()->mPropRequests.find(id);
    if (existing_req != LLGroupMgr::getInstance()->mPropRequests.end())
    {
        if (gFrameTime - existing_req->second < MIN_GROUP_PROPERTY_REQUEST_FREQ)
        {
            return true;
        }
        else
        {
            LLGroupMgr::getInstance()->mPropRequests.erase(existing_req);
        }
    }
    return false;
}

void LLGroupMgr::addPendingPropertyRequest(const LLUUID& id)
{
    LLGroupMgr::getInstance()->mPropRequests[id] = gFrameTime;
}

void LLGroupMgr::notifyObservers(LLGroupChange gc)
{
    for (group_map_t::iterator gi = mGroups.begin(); gi != mGroups.end(); ++gi)
    {
        LLUUID group_id = gi->first;
        if (gi->second->mChanged)
        {
            // notify LLGroupMgrObserver
            // Copy the map because observers may remove themselves on update
            observer_multimap_t observers = mObservers;

            // find all observers for this group id
            observer_multimap_t::iterator oi = observers.lower_bound(group_id);
            observer_multimap_t::iterator end = observers.upper_bound(group_id);
            for (; oi != end; ++oi)
            {
                oi->second->changed(gc);
            }
            gi->second->mChanged = false;


            // notify LLParticularGroupObserver
            observer_map_t::iterator obs_it = mParticularObservers.find(group_id);
            if(obs_it == mParticularObservers.end())
                return;

            observer_set_t& obs = obs_it->second;
            for (observer_set_t::iterator ob_it = obs.begin(); ob_it != obs.end(); ++ob_it)
            {
                (*ob_it)->changed(group_id, gc);
            }
        }
    }
}

void LLGroupMgr::addGroup(LLGroupMgrGroupData* group_datap)
{
    while (mGroups.size() >= MAX_CACHED_GROUPS)
    {
        // LRU: Remove the oldest un-observed group from cache until group size is small enough

        F32 oldest_access = (F32)LLFrameTimer::getTotalSeconds();
        group_map_t::iterator oldest_gi = mGroups.end();

        for (group_map_t::iterator gi = mGroups.begin(); gi != mGroups.end(); ++gi )
        {
            observer_multimap_t::iterator oi = mObservers.find(gi->first);
            if (oi == mObservers.end())
            {
                if (gi->second
                        && (gi->second->getAccessTime() < oldest_access))
                {
                    oldest_access = gi->second->getAccessTime();
                    oldest_gi = gi;
                }
            }
        }

        if (oldest_gi != mGroups.end())
        {
            delete oldest_gi->second;
            mGroups.erase(oldest_gi);
        }
        else
        {
            // All groups must be currently open, none to remove.
            // Just add the new group anyway, but get out of this loop as it
            // will never drop below max_cached_groups.
            break;
        }
    }

    mGroups[group_datap->getID()] = group_datap;
}


void LLGroupMgr::sendGroupPropertiesRequest(const LLUUID& group_id)
{
    LL_DEBUGS("GrpMgr") << "LLGroupMgr::sendGroupPropertiesRequest" << LL_ENDL;
    // This will happen when we get the reply
    //LLGroupMgrGroupData* group_datap = createGroupData(group_id);

    if (LLGroupMgr::getInstance()->hasPendingPropertyRequest(group_id))
    {
        LL_DEBUGS("GrpMgr") << "LLGroupMgr::sendGroupPropertiesRequest suppressed repeat for " << group_id << LL_ENDL;
        return;
    }
    LLGroupMgr::getInstance()->addPendingPropertyRequest(group_id);

    LLMessageSystem* msg = gMessageSystem;
    msg->newMessage("GroupProfileRequest");
    msg->nextBlock("AgentData");
    msg->addUUID("AgentID",gAgent.getID());
    msg->addUUID("SessionID",gAgent.getSessionID());
    msg->nextBlock("GroupData");
    msg->addUUID("GroupID",group_id);
    gAgent.sendReliableMessage();
}

void LLGroupMgr::sendGroupMembersRequest(const LLUUID& group_id)
{
    LL_DEBUGS("GrpMgr") << "LLGroupMgr::sendGroupMembersRequest" << LL_ENDL;
    LLGroupMgrGroupData* group_datap = createGroupData(group_id);
    if (group_datap->mMemberRequestID.isNull())
    {
        group_datap->removeMemberData();
        group_datap->mMemberRequestID.generate();

        LLMessageSystem* msg = gMessageSystem;
        msg->newMessage("GroupMembersRequest");
        msg->nextBlock("AgentData");
        msg->addUUID("AgentID",gAgent.getID());
        msg->addUUID("SessionID",gAgent.getSessionID());
        msg->nextBlock("GroupData");
        msg->addUUID("GroupID",group_id);
        msg->addUUID("RequestID",group_datap->mMemberRequestID);
        gAgent.sendReliableMessage();
    }
}


void LLGroupMgr::sendGroupRoleDataRequest(const LLUUID& group_id)
{
    LL_DEBUGS("GrpMgr") << "LLGroupMgr::sendGroupRoleDataRequest" << LL_ENDL;
    LLGroupMgrGroupData* group_datap = createGroupData(group_id);
    if (group_datap->mRoleDataRequestID.isNull())
    {
        group_datap->removeRoleData();
        group_datap->mRoleDataRequestID.generate();

        LLMessageSystem* msg = gMessageSystem;
        msg->newMessage("GroupRoleDataRequest");
        msg->nextBlock("AgentData");
        msg->addUUID("AgentID",gAgent.getID());
        msg->addUUID("SessionID",gAgent.getSessionID());
        msg->nextBlock("GroupData");
        msg->addUUID("GroupID",group_id);
        msg->addUUID("RequestID",group_datap->mRoleDataRequestID);
        gAgent.sendReliableMessage();
    }
}

void LLGroupMgr::sendGroupRoleMembersRequest(const LLUUID& group_id)
{
    LL_DEBUGS("GrpMgr") << "LLGroupMgr::sendGroupRoleMembersRequest" << LL_ENDL;
    LLGroupMgrGroupData* group_datap = createGroupData(group_id);

    if (group_datap->mRoleMembersRequestID.isNull())
    {
        // Don't send the request if we don't have all the member or role data
        if (!group_datap->isMemberDataComplete() || !group_datap->isRoleDataComplete())
        {
            // *TODO: KLW FIXME: Should we start a member or role data request?
            LL_INFOS("GrpMgr") << " Pending: " << (group_datap->mPendingRoleMemberRequest ? "Y" : "N")
                << ", MemberDataComplete: " << (group_datap->mMemberDataComplete ? "Y" : "N")
                << ", RoleDataComplete: " << (group_datap->mRoleDataComplete ? "Y" : "N") << LL_ENDL;
            group_datap->mPendingRoleMemberRequest = true;
            return;
        }

        group_datap->removeRoleMemberData();
        group_datap->mRoleMembersRequestID.generate();

        LLMessageSystem* msg = gMessageSystem;
        msg->newMessage("GroupRoleMembersRequest");
        msg->nextBlock("AgentData");
        msg->addUUID("AgentID",gAgent.getID());
        msg->addUUID("SessionID",gAgent.getSessionID());
        msg->nextBlock("GroupData");
        msg->addUUID("GroupID",group_id);
        msg->addUUID("RequestID",group_datap->mRoleMembersRequestID);
        gAgent.sendReliableMessage();
    }
}

void LLGroupMgr::sendGroupTitlesRequest(const LLUUID& group_id)
{
    LL_DEBUGS("GrpMgr") << "LLGroupMgr::sendGroupTitlesRequest" << LL_ENDL;
    LLGroupMgrGroupData* group_datap = createGroupData(group_id);

    group_datap->mTitles.clear();
    group_datap->mTitlesRequestID.generate();

    LLMessageSystem* msg = gMessageSystem;
    msg->newMessage("GroupTitlesRequest");
    msg->nextBlock("AgentData");
    msg->addUUID("AgentID",gAgent.getID());
    msg->addUUID("SessionID",gAgent.getSessionID());
    msg->addUUID("GroupID",group_id);
    msg->addUUID("RequestID",group_datap->mTitlesRequestID);

    gAgent.sendReliableMessage();
}

void LLGroupMgr::sendGroupTitleUpdate(const LLUUID& group_id, const LLUUID& title_role_id)
{
    LL_DEBUGS("GrpMgr") << "LLGroupMgr::sendGroupTitleUpdate" << LL_ENDL;

    LLMessageSystem* msg = gMessageSystem;
    msg->newMessage("GroupTitleUpdate");
    msg->nextBlock("AgentData");
    msg->addUUID("AgentID",gAgent.getID());
    msg->addUUID("SessionID",gAgent.getSessionID());
    msg->addUUID("GroupID",group_id);
    msg->addUUID("TitleRoleID",title_role_id);

    gAgent.sendReliableMessage();

    // Save the change locally
    LLGroupMgrGroupData* group_datap = createGroupData(group_id);
    for (std::vector<LLGroupTitle>::iterator iter = group_datap->mTitles.begin();
         iter != group_datap->mTitles.end(); ++iter)
    {
        if (iter->mRoleID == title_role_id)
        {
            iter->mSelected = true;
        }
        else if (iter->mSelected)
        {
            iter->mSelected = false;
        }
    }
}

// static
void LLGroupMgr::sendCreateGroupRequest(const std::string& name,
                                        const std::string& charter,
                                        U8 show_in_list,
                                        const LLUUID& insignia,
                                        S32 membership_fee,
                                        bool open_enrollment,
                                        bool allow_publish,
                                        bool mature_publish)
{
    LLMessageSystem* msg = gMessageSystem;
    msg->newMessage("CreateGroupRequest");
    msg->nextBlock("AgentData");
    msg->addUUID("AgentID",gAgent.getID());
    msg->addUUID("SessionID",gAgent.getSessionID());

    msg->nextBlock("GroupData");
    msg->addString("Name",name);
    msg->addString("Charter",charter);
    msg->addBOOL("ShowInList",show_in_list);
    msg->addUUID("InsigniaID",insignia);
    msg->addS32("MembershipFee",membership_fee);
    msg->addBOOL("OpenEnrollment",open_enrollment);
    msg->addBOOL("AllowPublish",allow_publish);
    msg->addBOOL("MaturePublish",mature_publish);

    gAgent.sendReliableMessage();
}

void LLGroupMgr::sendUpdateGroupInfo(const LLUUID& group_id)
{
    LL_DEBUGS("GrpMgr") << "LLGroupMgr::sendUpdateGroupInfo" << LL_ENDL;
    LLGroupMgrGroupData* group_datap = createGroupData(group_id);

    LLMessageSystem* msg = gMessageSystem;

    msg->newMessageFast(_PREHASH_UpdateGroupInfo);
    msg->nextBlockFast(_PREHASH_AgentData);
    msg->addUUIDFast(_PREHASH_AgentID,gAgent.getID());
    msg->addUUIDFast(_PREHASH_SessionID,gAgent.getSessionID());

    msg->nextBlockFast(_PREHASH_GroupData);
    msg->addUUIDFast(_PREHASH_GroupID,group_datap->getID());
    msg->addStringFast(_PREHASH_Charter,group_datap->mCharter);
    msg->addBOOLFast(_PREHASH_ShowInList,group_datap->mShowInList);
    msg->addUUIDFast(_PREHASH_InsigniaID,group_datap->mInsigniaID);
    msg->addS32Fast(_PREHASH_MembershipFee,group_datap->mMembershipFee);
    msg->addBOOLFast(_PREHASH_OpenEnrollment,group_datap->mOpenEnrollment);
    msg->addBOOLFast(_PREHASH_AllowPublish,group_datap->mAllowPublish);
    msg->addBOOLFast(_PREHASH_MaturePublish,group_datap->mMaturePublish);

    gAgent.sendReliableMessage();

    // Not expecting a response, so let anyone else watching know the data has changed.
    group_datap->mChanged = true;
    notifyObservers(GC_PROPERTIES);
}

void LLGroupMgr::sendGroupRoleMemberChanges(const LLUUID& group_id)
{
    LL_DEBUGS("GrpMgr") << "LLGroupMgr::sendGroupRoleMemberChanges" << LL_ENDL;
    LLGroupMgrGroupData* group_datap = createGroupData(group_id);

    if (group_datap->mRoleMemberChanges.empty()) return;

    LLMessageSystem* msg = gMessageSystem;

    bool start_message = true;
    for (LLGroupMgrGroupData::change_map_t::const_iterator citer = group_datap->mRoleMemberChanges.begin();
         citer != group_datap->mRoleMemberChanges.end(); ++citer)
    {
        if (start_message)
        {
            msg->newMessage("GroupRoleChanges");
            msg->nextBlockFast(_PREHASH_AgentData);
            msg->addUUIDFast(_PREHASH_AgentID,gAgent.getID());
            msg->addUUIDFast(_PREHASH_SessionID,gAgent.getSessionID());
            msg->addUUIDFast(_PREHASH_GroupID,group_id);
            start_message = false;
        }
        msg->nextBlock("RoleChange");
        msg->addUUID("RoleID",citer->second.mRole);
        msg->addUUID("MemberID",citer->second.mMember);
        msg->addU32("Change",(U32)citer->second.mChange);

        if (msg->isSendFullFast())
        {
            gAgent.sendReliableMessage();
            start_message = true;
        }
    }

    if (!start_message)
    {
        gAgent.sendReliableMessage();
    }

    group_datap->mRoleMemberChanges.clear();

    // Not expecting a response, so let anyone else watching know the data has changed.
    group_datap->mChanged = true;
    notifyObservers(GC_ROLE_MEMBER_DATA);
}

//static
void LLGroupMgr::sendGroupMemberJoin(const LLUUID& group_id)
{

    LLUIUsage::instance().logCommand("Group.Join");

    LLMessageSystem *msg = gMessageSystem;

    msg->newMessageFast(_PREHASH_JoinGroupRequest);
    msg->nextBlockFast(_PREHASH_AgentData);
    msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID() );
    msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
    msg->nextBlockFast(_PREHASH_GroupData);
    msg->addUUIDFast(_PREHASH_GroupID, group_id);

    gAgent.sendReliableMessage();
}

// member_role_pairs is <member_id,role_id>
// static
void LLGroupMgr::sendGroupMemberInvites(const LLUUID& group_id, std::map<LLUUID,LLUUID>& member_role_pairs)
{
    bool start_message = true;
    LLMessageSystem* msg = gMessageSystem;

    for (std::map<LLUUID,LLUUID>::iterator it = member_role_pairs.begin();
         it != member_role_pairs.end(); ++it)
    {
        if (start_message)
        {
            msg->newMessage("InviteGroupRequest");
            msg->nextBlock("AgentData");
            msg->addUUID("AgentID",gAgent.getID());
            msg->addUUID("SessionID",gAgent.getSessionID());
            msg->nextBlock("GroupData");
            msg->addUUID("GroupID",group_id);
            start_message = false;
        }

        msg->nextBlock("InviteData");
        msg->addUUID("InviteeID",(*it).first);
        msg->addUUID("RoleID",(*it).second);

        if (msg->isSendFull())
        {
            gAgent.sendReliableMessage();
            start_message = true;
        }
    }

    if (!start_message)
    {
        gAgent.sendReliableMessage();
    }
}

//static
void LLGroupMgr::sendGroupMemberEjects(const LLUUID& group_id,
                                       uuid_vec_t& member_ids)
{
    bool start_message = true;
    LLMessageSystem* msg = gMessageSystem;

    LLGroupMgrGroupData* group_datap = LLGroupMgr::getInstance()->getGroupData(group_id);
    if (!group_datap) return;

    for (uuid_vec_t::iterator it = member_ids.begin();
         it != member_ids.end(); ++it)
    {
        LLUUID& ejected_member_id = (*it);

        // Can't use 'eject' to leave a group.
        if (ejected_member_id == gAgent.getID()) continue;

        // Make sure they are in the group, and we need the member data
        LLGroupMgrGroupData::member_list_t::iterator mit = group_datap->mMembers.find(ejected_member_id);
        if (mit != group_datap->mMembers.end())
        {
            // Add them to the message
            if (start_message)
            {
                msg->newMessage("EjectGroupMemberRequest");
                msg->nextBlock("AgentData");
                msg->addUUID("AgentID",gAgent.getID());
                msg->addUUID("SessionID",gAgent.getSessionID());
                msg->nextBlock("GroupData");
                msg->addUUID("GroupID",group_id);
                start_message = false;
            }

            msg->nextBlock("EjectData");
            msg->addUUID("EjecteeID",ejected_member_id);

            if (msg->isSendFull())
            {
                gAgent.sendReliableMessage();
                start_message = true;
            }

            LLGroupMemberData* member_data = (*mit).second;

            // Clean up groupmgr
            for (LLGroupMemberData::role_list_t::iterator rit = member_data->roleBegin();
                 rit != member_data->roleEnd(); ++rit)
            {
                if ((*rit).first.notNull() && (*rit).second!=0)
                {
                    (*rit).second->removeMember(ejected_member_id);
                }
            }

            group_datap->mMembers.erase(ejected_member_id);

            // member_data was introduced and is used here instead of (*mit).second to avoid crash because of invalid iterator
            // It becomes invalid after line with erase above. EXT-4778
            delete member_data;
        }
    }

    if (!start_message)
    {
        gAgent.sendReliableMessage();
    }

    group_datap->mMemberVersion.generate();
}

void LLGroupMgr::getGroupBanRequestCoro(std::string url, LLUUID group_id)
{
    LLCore::HttpRequest::policy_t httpPolicy(LLCore::HttpRequest::DEFAULT_POLICY_ID);
    LLCoreHttpUtil::HttpCoroutineAdapter::ptr_t
        httpAdapter(new LLCoreHttpUtil::HttpCoroutineAdapter("groupMembersRequest", httpPolicy));
    LLCore::HttpRequest::ptr_t httpRequest(new LLCore::HttpRequest);

    std::string finalUrl = url + "?group_id=" + group_id.asString();

    LLSD result = httpAdapter->getAndSuspend(httpRequest, finalUrl);

    LLSD httpResults = result[LLCoreHttpUtil::HttpCoroutineAdapter::HTTP_RESULTS];
    LLCore::HttpStatus status = LLCoreHttpUtil::HttpCoroutineAdapter::getStatusFromLLSD(httpResults);

    if (!status)
    {
        LL_WARNS("GrpMgr") << "Error receiving group member data " << LL_ENDL;
        return;
    }

    if (result.has("ban_list"))
    {
        result.erase(LLCoreHttpUtil::HttpCoroutineAdapter::HTTP_RESULTS);
        // group ban data received
        processGroupBanRequest(result);
    }
}

void LLGroupMgr::postGroupBanRequestCoro(std::string url, LLUUID group_id,
    U32 action, uuid_vec_t ban_list, bool update)
{
    LLCore::HttpRequest::policy_t httpPolicy(LLCore::HttpRequest::DEFAULT_POLICY_ID);
    LLCoreHttpUtil::HttpCoroutineAdapter::ptr_t
        httpAdapter(new LLCoreHttpUtil::HttpCoroutineAdapter("groupMembersRequest", httpPolicy));
    LLCore::HttpRequest::ptr_t httpRequest(new LLCore::HttpRequest);
    LLCore::HttpHeaders::ptr_t httpHeaders(new LLCore::HttpHeaders);
    LLCore::HttpOptions::ptr_t httpOptions(new LLCore::HttpOptions);

    httpOptions->setFollowRedirects(false);

    httpHeaders->append(HTTP_OUT_HEADER_CONTENT_TYPE, HTTP_CONTENT_LLSD_XML);

    std::string finalUrl = url + "?group_id=" + group_id.asString();

    LLSD postData = LLSD::emptyMap();
    postData["ban_action"] = (LLSD::Integer)action;
    // Add our list of potential banned residents to the list
    postData["ban_ids"] = LLSD::emptyArray();

    for (const LLUUID& ban_id : ban_list)
    {
        postData["ban_ids"].append(ban_id);
    }

    LL_WARNS() << "post: " << ll_pretty_print_sd(postData) << LL_ENDL;

    LLSD result = httpAdapter->postAndSuspend(httpRequest, finalUrl, postData, httpOptions, httpHeaders);

    LLSD httpResults = result[LLCoreHttpUtil::HttpCoroutineAdapter::HTTP_RESULTS];
    LLCore::HttpStatus status = LLCoreHttpUtil::HttpCoroutineAdapter::getStatusFromLLSD(httpResults);

    if (!status)
    {
        LL_WARNS("GrpMgr") << "Error posting group member data " << LL_ENDL;
        return;
    }

    if (result.has("ban_list"))
    {
        result.erase(LLCoreHttpUtil::HttpCoroutineAdapter::HTTP_RESULTS);
        // group ban data received
        processGroupBanRequest(result);
    }

    if (update)
    {
        getGroupBanRequestCoro(url, group_id);
    }
}

void LLGroupMgr::sendGroupBanRequest(   EBanRequestType request_type,
                                        const LLUUID& group_id,
                                        U32 ban_action, /* = BAN_NO_ACTION */
                                        const std::vector<LLUUID> &ban_list) /* = std::vector<LLUUID>() */
{
    LLViewerRegion* currentRegion = gAgent.getRegion();
    if(!currentRegion)
    {
        LL_WARNS("GrpMgr") << "Agent does not have a current region. Uh-oh!" << LL_ENDL;
        return;
    }

    // Check to make sure we have our capabilities
    if(!currentRegion->capabilitiesReceived())
    {
        LL_WARNS("GrpMgr") << " Capabilities not received!" << LL_ENDL;
        return;
    }

    // Get our capability
    std::string cap_url =  currentRegion->getCapability("GroupAPIv1");
    if(cap_url.empty())
    {
        return;
    }

    U32 action = ban_action & ~BAN_UPDATE;
    bool update = ((ban_action & BAN_UPDATE) == BAN_UPDATE);

    switch (request_type)
    {
    case REQUEST_GET:
        LLCoros::instance().launch("LLGroupMgr::getGroupBanRequestCoro",
            boost::bind(&LLGroupMgr::getGroupBanRequestCoro, this, cap_url, group_id));
        break;
    case REQUEST_POST:
        LLCoros::instance().launch("LLGroupMgr::postGroupBanRequestCoro",
            boost::bind(&LLGroupMgr::postGroupBanRequestCoro, this, cap_url, group_id,
            action, ban_list, update));
        break;
    case REQUEST_PUT:
    case REQUEST_DEL:
        break;
    }
}

void LLGroupMgr::processGroupBanRequest(const LLSD& content)
{
    // Did we get anything in content?
    if(!content.size())
    {
        LL_WARNS("GrpMgr") << "No group member data received." << LL_ENDL;
        return;
    }

    LLUUID group_id = content["group_id"].asUUID();

    LLGroupMgrGroupData* gdatap = LLGroupMgr::getInstance()->getGroupData(group_id);
    if (!gdatap)
        return;

    gdatap->clearBanList();
    LLSD::map_const_iterator i      = content["ban_list"].beginMap();
    LLSD::map_const_iterator iEnd   = content["ban_list"].endMap();
    for(;i != iEnd; ++i)
    {
        const LLUUID ban_id(i->first);
        LLSD ban_entry(i->second);

        LLGroupBanData ban_data;
        if(ban_entry.has("ban_date"))
        {
            ban_data.mBanDate = ban_entry["ban_date"].asDate();
            // TODO: Ban Reason
        }

        gdatap->createBanEntry(ban_id, ban_data);
    }

    gdatap->mChanged = true;
    LLGroupMgr::getInstance()->notifyObservers(GC_BANLIST);
}

void LLGroupMgr::groupMembersRequestCoro(std::string url, LLUUID group_id, U32 page_size, U32 page_start, std::string sort_column)
{
    LL_INFOS("GrpMgr") << "group_id: '" << group_id << "', sort_column: '" << sort_column << "', page_size: " << page_size << ", page_start: " << page_start << LL_ENDL;
    LLCore::HttpRequest::policy_t httpPolicy(LLCore::HttpRequest::DEFAULT_POLICY_ID);
    LLCoreHttpUtil::HttpCoroutineAdapter::ptr_t
        httpAdapter(new LLCoreHttpUtil::HttpCoroutineAdapter("groupMembersRequest", httpPolicy));
    LLCore::HttpRequest::ptr_t httpRequest(new LLCore::HttpRequest);
    LLCore::HttpOptions::ptr_t httpOpts(new LLCore::HttpOptions);

    LLSD postData = LLSD::emptyMap();
    postData["group_id"] = group_id;
    if (page_size)
    {
        postData["page_size"] = LLSD::Integer(page_size);
        if (page_start)
        {
            postData["page_start"] = LLSD::Integer(page_start);
        }
        if (!sort_column.empty())
        {
            postData["sort_column"] = sort_column;
        }
    }

    LLSD response = httpAdapter->postAndSuspend(httpRequest, url, postData, httpOpts);

    mMemberRequestInFlight = false;

    LLSD httpResults = response.get(LLCoreHttpUtil::HttpCoroutineAdapter::HTTP_RESULTS);
    LLCore::HttpStatus status = LLCoreHttpUtil::HttpCoroutineAdapter::getStatusFromLLSD(httpResults);

    if (!status)
    {
        LL_WARNS("GrpMgr") << "Error receiving group member data " << LL_ENDL;
        return;
    }

    response.erase(LLCoreHttpUtil::HttpCoroutineAdapter::HTTP_RESULTS);
    processCapGroupMembersResponse(response, page_size, page_start, sort_column);
}

void LLGroupMgr::sendCapGroupMembersRequest(const LLUUID& group_id, U32 page_size, U32 page_start, const std::string& sort_column)
{
    static U32 lastGroupMemberRequestFrame = 0;

    // Have we requested the information already this frame?
    // Todo: make this per group, we can invite to one group and simultaneously be checking another one
    if ((lastGroupMemberRequestFrame == gFrameCount) || mMemberRequestInFlight)
        return;

    LLViewerRegion* currentRegion = gAgent.getRegion();
    // Thank you FS:Ansariel!
    if (!currentRegion)
    {
        LL_WARNS("GrpMgr") << "Agent does not have a current region. Uh-oh!" << LL_ENDL;
        return;
    }

    // Check to make sure we have our capabilities
    if (!currentRegion->capabilitiesReceived())
    {
        LL_WARNS("GrpMgr") << " Capabilities not received!" << LL_ENDL;
        return;
    }

    // Get our capability
    std::string cap_url =  currentRegion->getCapability("GroupMemberData");

    // Thank you FS:Ansariel!
    if (cap_url.empty())
    {
        LL_INFOS("GrpMgr") << "Region has no GroupMemberData capability. Falling back to UDP fetch." << LL_ENDL;
        sendGroupMembersRequest(group_id);
        return;
    }

    LLGroupMgrGroupData* group_datap = createGroupData(group_id); //make sure group exists
    group_datap->mMemberRequestID.generate(); // mark as pending

    lastGroupMemberRequestFrame = gFrameCount;

    mMemberRequestInFlight = true;

    LLCoros::instance().launch("LLGroupMgr::groupMembersRequestCoro", [&]()
        {
            groupMembersRequestCoro(cap_url, group_id, page_size, page_start, sort_column);
        });
}

void LLGroupMgr::processCapGroupMembersResponse(const LLSD& response, U32 page_size, U32 page_start, const std::string& sort_column)
{
    LLUUID group_id = response["group_id"].asUUID();
    LL_INFOS("GrpMgr") << "group_id: '" << group_id << "', sort_column: '" << sort_column << "', page_size: " << page_size << ", page_start: " << page_start << LL_ENDL;

    // Did we get anything in content?
    if (!response.size())
    {
        LL_INFOS("GrpMgr") << "No group member data received." << LL_ENDL;
        return;
    }

    LLGroupMgrGroupData* group_datap = getGroupData(group_id);
    if (!group_datap)
    {
        LL_WARNS("GrpMgr") << "Received incorrect, possibly stale, group or request id" << LL_ENDL;
        return;
    }

    LLSD members = response["members"];
    LLSD titles = response["titles"];
    LLSD defaults = response["defaults"];

    size_t members_before = group_datap->mMembers.size();
    size_t members_loaded = members.size();

    // Compute this once, rather than every time.
    std::string default_title = titles.size() ? titles[0].asString() : LLStringUtil::null;
    U64 default_powers = llstrtou64(defaults["default_powers"].asString().c_str(), NULL, 16);

    auto members_end = members.endMap();
    for (auto it = members.beginMap(); it != members_end; ++it)
    {
        // Reset defaults
        std::string online_status = "unknown";
        std::string title = default_title;
        U64 member_powers = default_powers;
        S32 donated_square_meters = 0;
        bool is_owner = false;

        const LLUUID member_id(it->first);
        LLSD member_info = it->second;

        if (member_info.has("last_login"))
        {
            online_status = member_info["last_login"].asString();
            if (online_status == "Online")
            {
                online_status = LLTrans::getString("group_member_status_online");
            }
            else
            {
                formatDateString(online_status);
            }
        }

        if (member_info.has("title"))
        {
            title = titles[member_info["title"].asInteger()].asString();
        }

        if (member_info.has("powers"))
        {
            member_powers = llstrtou64(member_info["powers"].asString().c_str(), NULL, 16);
        }

        if (member_info.has("donated_square_meters"))
        {
            donated_square_meters = member_info["donated_square_meters"];
        }

        if (member_info.has("owner"))
        {
            is_owner = true;
        }

        LLGroupMemberData* data = new LLGroupMemberData(member_id,
            donated_square_meters, member_powers, title, online_status, is_owner);

        if (group_datap->mRoleMemberDataComplete)
        {
            if (LLGroupMemberData* member_old = group_datap->mMembers[member_id])
            {
                auto role_end = member_old->roleEnd();
                for (auto role_it = member_old->roleBegin(); role_it != role_end; ++role_it)
                {
                    data->addRole(role_it->first, role_it->second);
                }
            }
            else
            {
                group_datap->mRoleMemberDataComplete = false;
            }
        }

        group_datap->mMembers[member_id] = data;
    }

    U32 member_count = (U32)group_datap->mMembers.size();

    group_datap->mMemberCount = (S32)member_count;
    group_datap->mMemberDataComplete = true;
    group_datap->mMemberRequestID.setNull();
    group_datap->mMemberVersion.generate();

    LL_INFOS("GrpMgr") << "members before: " << members_before
        << ", members loaded: " << members_loaded
        << ", members now: " << member_count << LL_ENDL;

    // Technically, we have this data, but to prevent completely overhauling
    // this entire system (it would be nice, but I don't have the time),
    // I'm going to be dumb and just call services I most likely don't need
    // with the thought being that the system might need it to be done.
    //
    // TODO:
    // Refactor to reduce multiple calls for data we already have.
    if (group_datap->mTitles.size() < 1)
    {
        sendGroupTitlesRequest(group_id);
    }

    if (page_size && members_loaded >= page_size && member_count > members_before)
    {
        sendCapGroupMembersRequest(group_id, page_size, member_count, sort_column);
    }

    // Make the role-member data request
    if (group_datap->mPendingRoleMemberRequest || !group_datap->mRoleMemberDataComplete)
    {
        group_datap->mPendingRoleMemberRequest = false;
        sendGroupRoleMembersRequest(group_id);
    }

    group_datap->mChanged = true;
    notifyObservers(GC_MEMBER_DATA);
}

void LLGroupMgr::sendGroupRoleChanges(const LLUUID& group_id)
{
    LL_DEBUGS("GrpMgr") << "LLGroupMgr::sendGroupRoleChanges" << LL_ENDL;
    LLGroupMgrGroupData* group_datap = getGroupData(group_id);

    if (group_datap && group_datap->pendingRoleChanges())
    {
        group_datap->sendRoleChanges();

        // Not expecting a response, so let anyone else watching know the data has changed.
        group_datap->mChanged = true;
        notifyObservers(GC_ROLE_DATA);
    }
}

void LLGroupMgr::cancelGroupRoleChanges(const LLUUID& group_id)
{
    LL_DEBUGS("GrpMgr") << "LLGroupMgr::cancelGroupRoleChanges" << LL_ENDL;

    if (LLGroupMgrGroupData* group_datap = getGroupData(group_id))
    {
        group_datap->cancelRoleChanges();
    }
}

//static
bool LLGroupMgr::parseRoleActions(const std::string& xml_filename)
{
    LLXMLNodePtr root;

    bool success = LLUICtrlFactory::getLayeredXMLNode(xml_filename, root);

    if (!success || !root || !root->hasName( "role_actions" ))
    {
        LL_ERRS() << "Problem reading UI role_actions file: " << xml_filename << LL_ENDL;
        return false;
    }

    LLXMLNodeList role_list;

    root->getChildren("action_set", role_list, false);

    for (LLXMLNodeList::iterator role_iter = role_list.begin(); role_iter != role_list.end(); ++role_iter)
    {
        LLXMLNodePtr action_set = role_iter->second;

        LLRoleActionSet* role_action_set = new LLRoleActionSet();
        LLRoleAction* role_action_data = new LLRoleAction();

        // name=
        std::string action_set_name;
        if (action_set->getAttributeString("name", action_set_name))
        {
            LL_DEBUGS("GrpMgr") << "Loading action set " << action_set_name << LL_ENDL;
            role_action_data->mName = action_set_name;
        }
        else
        {
            LL_WARNS() << "Unable to parse action set with no name" << LL_ENDL;
            delete role_action_set;
            delete role_action_data;
            continue;
        }
        // description=
        std::string set_description;
        if (action_set->getAttributeString("description", set_description))
        {
            role_action_data->mDescription = set_description;
        }
        // long description=
        std::string set_longdescription;
        if (action_set->getAttributeString("longdescription", set_longdescription))
        {
            role_action_data->mLongDescription = set_longdescription;
        }

        // power mask=
        U64 set_power_mask = 0;

        LLXMLNodeList action_list;
        LLXMLNodeList::iterator action_iter;

        action_set->getChildren("action", action_list, false);

        for (action_iter = action_list.begin(); action_iter != action_list.end(); ++action_iter)
        {
            LLXMLNodePtr action = action_iter->second;

            LLRoleAction* role_action = new LLRoleAction();

            // name=
            std::string action_name;
            if (action->getAttributeString("name", action_name))
            {
                LL_DEBUGS("GrpMgr") << "Loading action " << action_name << LL_ENDL;
                role_action->mName = action_name;
            }
            else
            {
                LL_WARNS() << "Unable to parse action with no name" << LL_ENDL;
                delete role_action;
                continue;
            }
            // description=
            std::string description;
            if (action->getAttributeString("description", description))
            {
                role_action->mDescription = description;
            }
            // long description=
            std::string longdescription;
            if (action->getAttributeString("longdescription", longdescription))
            {
                role_action->mLongDescription = longdescription;
            }
            // description=
            S32 power_bit = 0;
            if (action->getAttributeS32("value", power_bit))
            {
                if (0 <= power_bit && power_bit < 64)
                {
                    role_action->mPowerBit = 0x1LL << power_bit;
                }
            }

            set_power_mask |= role_action->mPowerBit;

            role_action_set->mActions.push_back(role_action);
        }

        role_action_data->mPowerBit = set_power_mask;
        role_action_set->mActionSetData = role_action_data;

        LLGroupMgr::getInstance()->mRoleActionSets.push_back(role_action_set);
    }
    return true;
}

// static
void LLGroupMgr::debugClearAllGroups(void*)
{
    LLGroupMgr::getInstance()->clearGroups();
    LLGroupMgr::parseRoleActions("role_actions.xml");
}