messageitemsetmanager.cpp

/******************************************************************************
 *
 *  SPDX-FileCopyrightText: 2008 Szymon Tomasz Stefanek <[email protected]>
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 *
 *******************************************************************************/
 
#include "core/messageitemsetmanager.h"
#include "core/messageitem.h"
 
using namespace MessageList::Core;
 
MessageItemSetManager::MessageItemSetManager()
{
    mSets = new QHash<MessageItemSetReference, QHash<MessageItem *, MessageItem *> *>();
}
 
MessageItemSetManager::~MessageItemSetManager()
{
    clearAllSets();
    delete mSets;
}
 
void MessageItemSetManager::clearAllSets()
{
    for (auto it = mSets->cbegin(), end = mSets->cend(); it != end; ++it) {
        delete (*it);
    }
    mSets->clear();
}
 
int MessageItemSetManager::setCount() const
{
    return mSets->count();
}
 
void MessageItemSetManager::removeSet(MessageItemSetReference ref)
{
    auto set = mSets->value(static_cast<ulong>(ref), nullptr);
    if (!set) {
        return;
    }
    mSets->remove(static_cast<ulong>(ref));
    delete set;
}
 
QList<MessageItem *> MessageItemSetManager::messageItems(MessageItemSetReference ref)
{
    auto set = mSets->value(static_cast<ulong>(ref), nullptr);
    if (!set) {
        return {};
    }
 
    return set->values();
}
 
void MessageItemSetManager::removeMessageItemFromAllSets(MessageItem *mi)
{
    QVector<MessageItemSetReference> setsToBeKilled;
 
    for (auto it = mSets->cbegin(), end = mSets->cend(); it != end; ++it) {
        (*it)->remove(mi);
        if ((*it)->isEmpty()) {
            setsToBeKilled.append(it.key());
        }
    }
 
    for (const auto set : setsToBeKilled) {
        removeSet(set);
    }
}
 
MessageItemSetReference MessageItemSetManager::createSet()
{
    static unsigned long int uNextId = 0;
    uNextId++;
 
    auto set = mSets->value(uNextId, nullptr);
 
    // Here we assume that having 2^32 sets is impossible
    // (that would be _at_least_ 2^32 * 8 bytes of allocated memory which is
    // quite a lot...)
 
    while (set) {
        uNextId++;
        set = mSets->value(uNextId, nullptr);
    }
 
    set = new QHash<MessageItem *, MessageItem *>();
    mSets->insert(uNextId, set);
 
    return static_cast<MessageItemSetReference>(uNextId);
}
 
bool MessageItemSetManager::addMessageItem(MessageItemSetReference ref, MessageItem *mi)
{
    auto set = mSets->value(static_cast<ulong>(ref), nullptr);
    if (!set) {
        return false;
    }
 
    set->insert(mi, mi);
 
    return true;
}