handled a case when user removes downloaded file, minor optimizations on message changing

core/account.cpp

@@ -920,3 +920,6 @@ void Core::Account::onContactHistoryResponse(const std::list<Shared::Message>& l
     }
     emit responseArchive(contact->jid, list, last);
 }
+
+void Core::Account::requestChangeMessage(const QString& jid, const QString& messageId, const QMap<QString, QVariant>& data){
+    mh->requestChangeMessage(jid, messageId, data);}

core/account.h

@@ -96,6 +96,7 @@ public:
     void addContactToGroupRequest(const QString& jid, const QString& groupName);
     void removeContactFromGroupRequest(const QString& jid, const QString& groupName);
     void renameContactRequest(const QString& jid, const QString& newName);
+    void requestChangeMessage(const QString& jid, const QString& messageId, const QMap<QString, QVariant>& data);
     
     void setRoomJoined(const QString& jid, bool joined);
     void setRoomAutoJoin(const QString& jid, bool joined);

core/handlers/messagehandler.cpp

@@ -429,3 +429,18 @@ void Core::MessageHandler::sendMessageWithLocalUploadedFile(Shared::Message msg,
     performSending(msg);
     //TODO removal/progress update
 }
+
+void Core::MessageHandler::requestChangeMessage(const QString& jid, const QString& messageId, const QMap<QString, QVariant>& data)
+{
+    RosterItem* cnt = acc->rh->getRosterItem(jid);
+    if (cnt != 0) {
+        QMap<QString, QVariant>::const_iterator itr = data.find("attachPath");
+        if (data.size() == 1 && itr != data.end()) {
+            cnt->changeMessage(messageId, data);
+            emit acc->changeMessage(jid, messageId, data);
+        } else {
+            qDebug() << "A request to change message" << messageId << "of conversation" << jid << "with following data" << data;
+            qDebug() << "nothing but the changing of the local path is supported yet in this method, skipping";
+        }
+    }
+}

core/handlers/messagehandler.h

@@ -58,6 +58,7 @@ public slots:
     void onDownloadFileComplete(const std::list<Shared::MessageInfo>& msgs, const QString& path);
     void onUploadFileComplete(const std::list<Shared::MessageInfo>& msgs, const QString& path);
     void onLoadFileError(const std::list<Shared::MessageInfo>& msgs, const QString& path, bool up);
+    void requestChangeMessage(const QString& jid, const QString& messageId, const QMap<QString, QVariant>& data);
     
 private:
     bool handleChatMessage(const QXmppMessage& msg, bool outgoing = false, bool forwarded = false, bool guessing = false);

core/networkaccess.cpp

@@ -493,3 +493,8 @@ QString Core::NetworkAccess::addMessageAndCheckForPath(const QString& url, const
 {
     return storage.addMessageAndCheckForPath(url, account, jid, id);
 }
+
+std::list<Shared::MessageInfo> Core::NetworkAccess::reportPathInvalid(const QString& path)
+{
+    return storage.deletedFile(path);
+}

core/networkaccess.h

@@ -53,6 +53,7 @@ public:
     QString addMessageAndCheckForPath(const QString& url, const QString& account, const QString& jid, const QString& id);
     void uploadFile(const Shared::MessageInfo& info, const QString& path, const QUrl& put, const QUrl& get, const QMap<QString, QString> headers);
     bool checkAndAddToUploading(const QString& acc, const QString& jid, const QString id, const QString path);
+    std::list<Shared::MessageInfo> reportPathInvalid(const QString& path);
     
 signals:
     void loadFileProgress(const std::list<Shared::MessageInfo>& msgs, qreal value, bool up);

core/squawk.cpp

@@ -751,3 +751,20 @@ void Core::Squawk::onAccountUploadFileError(const QString& jid, const QString id
     Account* acc = static_cast<Account*>(sender());
     emit fileError({{acc->getName(), jid, id}}, errorText, true);
 }
+
+void Core::Squawk::onLocalPathInvalid(const QString& path)
+{
+    std::list<Shared::MessageInfo> list = network.reportPathInvalid(path);
+    
+    QMap<QString, QVariant> data({
+        {"attachPath", ""}
+    });
+    for (const Shared::MessageInfo& info : list) {
+        AccountsMap::const_iterator itr = amap.find(info.account);
+        if (itr != amap.end()) {
+            itr->second->requestChangeMessage(info.jid, info.messageId, data);
+        } else {
+            qDebug() << "Reacting on failure to reach file" << path << "there was an attempt to change message in account" << info.account << "which doesn't exist, skipping";
+        }
+    }
+}

core/squawk.h

@@ -121,6 +121,7 @@ public slots:
     void requestVCard(const QString& account, const QString& jid);
     void uploadVCard(const QString& account, const Shared::VCard& card);
     void responsePassword(const QString& account, const QString& password);
+    void onLocalPathInvalid(const QString& path);
     
 private:
     typedef std::deque<Account*> Accounts;

core/urlstorage.cpp

@@ -348,6 +348,7 @@ std::list<Shared::MessageInfo> Core::UrlStorage::deletedFile(const QString& path
             url = QString(surl.c_str());
         } else if (rc == MDB_NOTFOUND) {
             qDebug() << "Have been asked to remove file" << path << ", which isn't in the database, skipping";
+            mdb_txn_abort(txn);
             return list;
         } else {
             throw Archive::Unknown(name.toStdString(), mdb_strerror(rc));

main.cpp

@@ -116,6 +116,7 @@ int main(int argc, char *argv[])
     QObject::connect(&w, &Squawk::requestVCard, squawk, &Core::Squawk::requestVCard);
     QObject::connect(&w, &Squawk::uploadVCard, squawk, &Core::Squawk::uploadVCard);
     QObject::connect(&w, &Squawk::responsePassword, squawk, &Core::Squawk::responsePassword);
+    QObject::connect(&w, &Squawk::localPathInvalid, squawk, &Core::Squawk::onLocalPathInvalid);
     
     QObject::connect(squawk, &Core::Squawk::newAccount, &w, &Squawk::newAccount);
     QObject::connect(squawk, &Core::Squawk::addContact, &w, &Squawk::addContact);

shared/message.cpp

@@ -394,6 +394,8 @@ bool Shared::Message::change(const QMap<QString, QVariant>& data)
     
     itr = data.find("body");
     if (itr != data.end()) {
+        QString b = itr.value().toString();
+        if (body != b) {
             QMap<QString, QVariant>::const_iterator dItr = data.find("stamp");
             QDateTime correctionDate;
             if (dItr != data.end()) {
@@ -404,10 +406,11 @@ bool Shared::Message::change(const QMap<QString, QVariant>& data)
             if (!edited || lastModified < correctionDate) {
                 originalMessage = body;
                 lastModified = correctionDate;
-            setBody(itr.value().toString());
+                setBody(body);
                 setEdited(true);
             }
         }
+    }
     
     return idChanged;
 }

ui/models/element.cpp

@@ -33,6 +33,7 @@ Models::Element::Element(Type p_type, const Models::Account* acc, const QString&
     connect(feed, &MessageFeed::fileDownloadRequest, this, &Element::fileDownloadRequest);
     connect(feed, &MessageFeed::unreadMessagesCountChanged, this, &Element::onFeedUnreadMessagesCountChanged);
     connect(feed, &MessageFeed::unnoticedMessage, this, &Element::onFeedUnnoticedMessage);
+    connect(feed, &MessageFeed::localPathInvalid, this, &Element::localPathInvalid);
     
     QMap<QString, QVariant>::const_iterator itr = data.find("avatarState");
     if (itr != data.end()) {

ui/models/element.h

@@ -51,6 +51,7 @@ signals:
     void requestArchive(const QString& before);
     void fileDownloadRequest(const QString& url);
     void unnoticedMessage(const QString& account, const Shared::Message& msg);
+    void localPathInvalid(const QString& path);
     
 protected:
     void setJid(const QString& p_jid);

ui/models/messagefeed.cpp

@@ -116,6 +116,7 @@ void Models::MessageFeed::changeMessage(const QString& id, const QMap<QString, Q
         }
     }
     
+    if (changeRoles.size() > 0) {
         //change message is a final event in download/upload event train
         //only after changeMessage we can consider the download is done
         Progress::const_iterator dItr = downloads.find(id);
@@ -147,6 +148,7 @@ void Models::MessageFeed::changeMessage(const QString& id, const QMap<QString, Q
         }
         
         emit dataChanged(index, index, cr);
+    }
 }
 
 std::set<Models::MessageFeed::MessageRoles> Models::MessageFeed::detectChanges(const Shared::Message& msg, const QMap<QString, QVariant>& data) const
@@ -174,13 +176,13 @@ std::set<Models::MessageFeed::MessageRoles> Models::MessageFeed::detectChanges(c
     
     if (state == Shared::Message::State::error) {
         itr = data.find("errorText");
-        if (itr != data.end()) {
+        if (itr != data.end() && itr.value().toString() != msg.getErrorText()) {
             roles.insert(MessageRoles::Error);
         }
     }
     
     itr = data.find("body");
-    if (itr != data.end()) {
+    if (itr != data.end() && itr.value().toString() != msg.getBody()) {
         QMap<QString, QVariant>::const_iterator dItr = data.find("stamp");
         QDateTime correctionDate;
         if (dItr != data.end()) {
@@ -522,3 +524,22 @@ QModelIndex Models::MessageFeed::modelIndexByTime(const QString& id, const QDate
     
     return QModelIndex();
 }
+
+void Models::MessageFeed::reportLocalPathInvalid(const QString& messageId)
+{
+    StorageById::iterator itr = indexById.find(messageId);
+    if (itr == indexById.end()) {
+        qDebug() << "received a command to change a message, but the message couldn't be found, skipping";
+        return;
+    }
+    
+    Shared::Message* msg = *itr;
+    
+    emit localPathInvalid(msg->getAttachPath());
+    
+    //gonna change the message in current model right away, to prevent spam on each attemt to draw element
+    QModelIndex index = modelIndexByTime(messageId, msg->getTime());
+    msg->setAttachPath("");
+    
+    emit dataChanged(index, index, {MessageRoles::Attach});
+}

ui/models/messagefeed.h

@@ -60,6 +60,7 @@ public:
     void downloadAttachment(const QString& messageId);
     void uploadAttachment(const QString& messageId);
     bool registerUpload(const QString& messageId);
+    void reportLocalPathInvalid(const QString& messageId);
     
     unsigned int unreadMessagesCount() const;
     void fileProgress(const QString& messageId, qreal value, bool up);
@@ -76,6 +77,7 @@ signals:
     void unreadMessagesCountChanged();
     void newMessage(const Shared::Message& msg);
     void unnoticedMessage(const Shared::Message& msg);
+    void localPathInvalid(const QString& path);
     
 public:
     enum MessageRoles {

ui/models/roster.cpp

@@ -449,6 +449,7 @@ void Models::Roster::addContact(const QString& account, const QString& jid, cons
             connect(contact, &Contact::requestArchive, this, &Roster::onElementRequestArchive);
             connect(contact, &Contact::fileDownloadRequest, this, &Roster::fileDownloadRequest);
             connect(contact, &Contact::unnoticedMessage, this, &Roster::unnoticedMessage);
+            connect(contact, &Contact::localPathInvalid, this, &Roster::localPathInvalid);
             contacts.insert(std::make_pair(id, contact));
         } else {
             contact = itr->second;
@@ -787,6 +788,7 @@ void Models::Roster::addRoom(const QString& account, const QString jid, const QM
     connect(room, &Contact::requestArchive, this, &Roster::onElementRequestArchive);
     connect(room, &Contact::fileDownloadRequest, this, &Roster::fileDownloadRequest);
     connect(room, &Contact::unnoticedMessage, this, &Roster::unnoticedMessage);
+    connect(room, &Contact::localPathInvalid, this, &Roster::localPathInvalid);
     rooms.insert(std::make_pair(id, room));
     acc->appendChild(room);
 }

ui/models/roster.h

@@ -93,6 +93,7 @@ signals:
     void requestArchive(const QString& account, const QString& jid, const QString& before);
     void fileDownloadRequest(const QString& url);
     void unnoticedMessage(const QString& account, const Shared::Message& msg);
+    void localPathInvalid(const QString& path);
     
 private:
     Element* getElement(const ElId& id);

ui/squawk.cpp

@@ -64,6 +64,7 @@ Squawk::Squawk(QWidget *parent) :
     connect(rosterModel.accountsModel, &Models::Accounts::sizeChanged, this, &Squawk::onAccountsSizeChanged);
     connect(&rosterModel, &Models::Roster::requestArchive, this, &Squawk::onRequestArchive);
     connect(&rosterModel, &Models::Roster::fileDownloadRequest, this, &Squawk::fileDownloadRequest);
+    connect(&rosterModel, &Models::Roster::localPathInvalid, this, &Squawk::localPathInvalid);
     connect(contextMenu, &QMenu::aboutToHide, this, &Squawk::onContextAboutToHide);
     //m_ui->mainToolBar->addWidget(m_ui->comboBox);
     

ui/squawk.h

@@ -79,6 +79,7 @@ signals:
     void requestVCard(const QString& account, const QString& jid);
     void uploadVCard(const QString& account, const Shared::VCard& card);
     void responsePassword(const QString& account, const QString& password);
+    void localPathInvalid(const QString& path);
     
 public slots:
     void readSettings();

ui/utils/feedview.cpp

@@ -304,6 +304,7 @@ void FeedView::setItemDelegate(QAbstractItemDelegate* delegate)
     if (specialDelegate) {
         MessageDelegate* del = static_cast<MessageDelegate*>(itemDelegate());
         disconnect(del, &MessageDelegate::buttonPushed, this, &FeedView::onMessageButtonPushed);
+        disconnect(del, &MessageDelegate::invalidPath, this, &FeedView::onMessageInvalidPath);
     }
     
     QAbstractItemView::setItemDelegate(delegate);
@@ -312,6 +313,7 @@ void FeedView::setItemDelegate(QAbstractItemDelegate* delegate)
     if (del) {
         specialDelegate = true;
         connect(del, &MessageDelegate::buttonPushed, this, &FeedView::onMessageButtonPushed);
+        connect(del, &MessageDelegate::invalidPath, this, &FeedView::onMessageInvalidPath);
     } else {
         specialDelegate = false;
     }
@@ -341,3 +343,12 @@ void FeedView::onMessageButtonPushed(const QString& messageId, bool download)
         }
     }
 }
+
+void FeedView::onMessageInvalidPath(const QString& messageId)
+{
+    if (specialModel) {
+        Models::MessageFeed* feed = static_cast<Models::MessageFeed*>(model());
+        feed->reportLocalPathInvalid(messageId);
+    }
+}
+

ui/utils/feedview.h

@@ -55,6 +55,7 @@ protected slots:
     void verticalScrollbarValueChanged(int value) override;
     void dataChanged(const QModelIndex & topLeft, const QModelIndex & bottomRight, const QVector<int> & roles) override;
     void onMessageButtonPushed(const QString& messageId, bool download);
+    void onMessageInvalidPath(const QString& messageId);
     
 protected:
     int verticalOffset() const override;

ui/utils/messagedelegate.cpp

@@ -310,7 +310,11 @@ void MessageDelegate::paintPreview(const Models::FeedItem& data, QPainter* paint
             start = option.rect.topLeft();
         }
         QImage img(data.attach.localPath);
+        if (img.isNull()) {
+            emit invalidPath(data.id);
+        } else {
             painter->drawImage(QRect(start, size), img);
+        }
         
         option.rect.adjust(0, size.height() + textMargin, 0, 0);
     }

ui/utils/messagedelegate.h

@@ -55,6 +55,7 @@ public:
     
 signals:
     void buttonPushed(const QString& messageId, bool download) const;
+    void invalidPath(const QString& messageId) const;
     
 protected:
     void paintButton(QPushButton* btn, QPainter* painter, bool sentByMe, QStyleOptionViewItem& option) const;