File indexing completed on 2024-05-26 05:27:32

 /*
  *   Copyright (C) 2015 Christian Mollekopf <chrigi_1@fastmail.fm>
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
  *   the Free Software Foundation; either version 2 of the License, or
  *   (at your option) any later version.
  *
  *   This program 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 General Public License for more details.
  *
  *   You should have received a copy of the GNU General Public License
  *   along with this program; if not, write to the
  *   Free Software Foundation, Inc.,
  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA.
  */
 #include "threadindexer.h"
 
 #include "typeindex.h"
 #include "log.h"
 #include "utils.h"
 
 using namespace Sink;
 using namespace Sink::ApplicationDomain;
 
 void ThreadIndexer::updateThreadingIndex(const ApplicationDomain::ApplicationDomainType &entity, Sink::Storage::DataStore::Transaction &transaction)
 {
     const auto messageId = entity.getProperty(Mail::MessageId::name);
     if (messageId.toByteArray().isEmpty()) {
         SinkWarning() << "Found an email without messageId. This is illegal and threading will break. Entity id: " << entity.identifier();
     }
     const auto parentMessageIds = entity.getProperty(Mail::ParentMessageIds::name).value<QByteArrayList>();
 
     SinkTrace() << "Indexing thread. Entity: " << entity.identifier() << "Messageid: " << messageId << "ParentMessageId: " << parentMessageIds;
 
     //check if a child already registered our thread.
     QVector<QByteArray> thread = index().secondaryLookup<Mail::MessageId, Mail::ThreadId>(messageId);
 
     if (!thread.isEmpty() && !parentMessageIds.isEmpty()) {
         //A child already registered our thread so we merge the childs thread
         //* check if we have a parent thread, if not just continue as usual
         //* get all messages that have the same threadid as the child
         //* switch all to the parents thread
         for (const auto &parentMessageId : parentMessageIds) {
             auto parentThread = index().secondaryLookup<Mail::MessageId, Mail::ThreadId>(parentMessageId);
             if (!parentThread.isEmpty()) {
                 auto childThreadId = thread.first();
                 auto parentThreadId = parentThread.first();
                 //Can happen if the message is already available locally.
                 if (childThreadId == parentThreadId) {
                     //Nothing to do
                     return;
                 }
                 SinkTrace() << "Merging child thread: " << childThreadId << " into parent thread: " << parentThreadId;
 
                 //Ensure this mail ends up in the correct thread
                 index().unindex<Mail::MessageId, Mail::ThreadId>(messageId, childThreadId, transaction);
                 //We have to copy the id here, otherwise it doesn't survive the subsequent writes
                 thread = {QByteArray{parentThreadId.data(), parentThreadId.size()}};
 
                 //Merge all child messages into the correct thread
                 auto childThreadMessageIds = index().secondaryLookup<Mail::ThreadId, Mail::MessageId>(childThreadId);
                 for (const auto &msgId : childThreadMessageIds) {
                     SinkTrace() << "Merging child message: " << msgId;
                     index().unindex<Mail::MessageId, Mail::ThreadId>(msgId, childThreadId, transaction);
                     index().unindex<Mail::ThreadId, Mail::MessageId>(childThreadId, msgId, transaction);
                     index().index<Mail::MessageId, Mail::ThreadId>(msgId, parentThreadId, transaction);
                     index().index<Mail::ThreadId, Mail::MessageId>(parentThreadId, msgId, transaction);
                 }
                 break;
             }
         }
     }
 
     //If parent is already available, add to thread of the first parent to match
     if (thread.isEmpty() && !parentMessageIds.isEmpty()) {
         for (const auto &parentMessageId : parentMessageIds) {
             thread = index().secondaryLookup<Mail::MessageId, Mail::ThreadId>(parentMessageId);
             if (!thread.isEmpty()) {
                 break;
             }
         }
         SinkTrace() << "Found parent: " << thread;
     }
 
     //Create a new thread as last resort
     if (thread.isEmpty()) {
         thread = {Sink::createUuid()};
         SinkTrace() << "Created a new thread: " << thread;
     }
 
     if (!parentMessageIds.isEmpty()) {
         //Register the first (closest) parent with thread for when it becomes available
         index().index<Mail::MessageId, Mail::ThreadId>(parentMessageIds.first(), thread.first(), transaction);
     }
     index().index<Mail::MessageId, Mail::ThreadId>(messageId, thread.first(), transaction);
     index().index<Mail::ThreadId, Mail::MessageId>(thread.first(), messageId, transaction);
 }
 
 
 void ThreadIndexer::add(const ApplicationDomain::ApplicationDomainType &entity)
 {
     updateThreadingIndex(entity, transaction());
 }
 
 void ThreadIndexer::modify(const ApplicationDomain::ApplicationDomainType &oldEntity, const ApplicationDomain::ApplicationDomainType &newEntity)
 {
     //TODO Implement to support thread changes.
     //Emails are immutable (for everything threading relevant), so we don't care about it so far.
 }
 
 void ThreadIndexer::remove(const ApplicationDomain::ApplicationDomainType &entity)
 {
     const auto messageId = entity.getProperty(Mail::MessageId::name);
     const auto thread = index().secondaryLookup<Mail::MessageId, Mail::ThreadId>(messageId);
     if (thread.isEmpty()) {
         SinkWarning() << "Failed to find the threadId for the entity " << entity.identifier() << messageId;
         return;
     }
     index().unindex<Mail::MessageId, Mail::ThreadId>(messageId.toByteArray(), thread.first(), transaction());
     index().unindex<Mail::ThreadId, Mail::MessageId>(thread.first(), messageId.toByteArray(), transaction());
 }
 
 QMap<QByteArray, int> ThreadIndexer::databases()
 {
     return {{"mail.index.messageIdthreadId", Sink::Storage::AllowDuplicates},
             {"mail.index.threadIdmessageId", Sink::Storage::AllowDuplicates}};
 }