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/*
* 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 "mailpreprocessor.h"
#include <QFile>
#include <QDir>
#include <QTextDocument>
#include <QGuiApplication>
#include <KMime/KMime/KMimeMessage>
#include "pipeline.h"
#include "fulltextindex.h"
#include "definitions.h"
#include "applicationdomaintype.h"
using namespace Sink;
static Sink::ApplicationDomain::Mail::Contact getContact(const KMime::Headers::Generics::MailboxList *header)
{
const auto name = header->displayNames().isEmpty() ? QString() : header->displayNames().first();
const auto address = header->addresses().isEmpty() ? QString() : header->addresses().first();
return Sink::ApplicationDomain::Mail::Contact{name, address};
}
static QList<Sink::ApplicationDomain::Mail::Contact> getContactList(const KMime::Headers::Generics::AddressList *header)
{
QList<Sink::ApplicationDomain::Mail::Contact> list;
for (const auto &mb : header->mailboxes()) {
list << Sink::ApplicationDomain::Mail::Contact{mb.name(), mb.address()};
}
return list;
}
static QList<QPair<QString, QString>> processPart(KMime::Content* content)
{
if (KMime::Headers::ContentType* type = content->contentType(false)) {
if (type->isMultipart() && !type->isSubtype("encrypted")) {
QList<QPair<QString, QString>> list;
for (const auto c : content->contents()) {
list << processPart(c);
}
return list;
} else if (type->isHTMLText()) {
//QTextDocument has an implicit runtime dependency on QGuiApplication via the color palette.
//If the QGuiApplication is not available we will crash (if the html contains colors).
Q_ASSERT(QGuiApplication::instance());
// Only get HTML content, if no plain text content
QTextDocument doc;
doc.setHtml(content->decodedText());
return {{{}, {doc.toPlainText()}}};
} else if (type->isEmpty()) {
return {{{}, {content->decodedText()}}};
}
}
return {};
}
void MailPropertyExtractor::updatedIndexedProperties(Sink::ApplicationDomain::Mail &mail, const QByteArray &data)
{
if (data.isEmpty()) {
return;
}
auto msg = KMime::Message::Ptr(new KMime::Message);
msg->setContent(KMime::CRLFtoLF(data));
msg->parse();
if (!msg) {
return;
}
mail.setExtractedSubject(msg->subject(true)->asUnicodeString());
mail.setExtractedSender(getContact(msg->from(true)));
mail.setExtractedTo(getContactList(msg->to(true)));
mail.setExtractedCc(getContactList(msg->cc(true)));
mail.setExtractedBcc(getContactList(msg->bcc(true)));
mail.setExtractedDate(msg->date(true)->dateTime());
const auto parentMessageId = [&] {
//The last is the parent
auto references = msg->references(true)->identifiers();
//The first is the parent
auto inReplyTo = msg->inReplyTo(true)->identifiers();
if (!references.isEmpty()) {
return references.last();
//TODO we could use the rest of the references header to complete the ancestry in case we have missing parents.
} else {
if (!inReplyTo.isEmpty()) {
//According to RFC5256 we should ignore all but the first
return inReplyTo.first();
}
}
return QByteArray{};
}();
//The rest should never change, unless we didn't have the headers available initially.
auto messageId = msg->messageID(true)->identifier();
if (messageId.isEmpty()) {
//reuse an existing messageis (on modification)
auto existing = mail.getMessageId();
if (existing.isEmpty()) {
auto tmp = KMime::Message::Ptr::create();
auto header = tmp->messageID(true);
header->generate("kube.kde.org");
messageId = header->as7BitString();
SinkWarning() << "Message id is empty, generating one: " << messageId;
} else {
messageId = existing;
}
}
mail.setExtractedMessageId(messageId);
if (!parentMessageId.isEmpty()) {
mail.setExtractedParentMessageId(parentMessageId);
}
QList<QPair<QString, QString>> contentToIndex;
contentToIndex.append({{}, msg->subject()->asUnicodeString()});
if (KMime::Content* mainBody = msg->mainBodyPart("text/plain")) {
contentToIndex.append({{}, mainBody->decodedText()});
} else {
contentToIndex << processPart(msg.data());
}
const auto sender = mail.getSender();
contentToIndex.append({{}, sender.name});
contentToIndex.append({{}, sender.emailAddress});
for (const auto &c : mail.getTo()) {
contentToIndex.append({{}, c.name});
contentToIndex.append({{}, c.emailAddress});
}
for (const auto &c : mail.getCc()) {
contentToIndex.append({{}, c.name});
contentToIndex.append({{}, c.emailAddress});
}
for (const auto &c : mail.getBcc()) {
contentToIndex.append({{}, c.name});
contentToIndex.append({{}, c.emailAddress});
}
//Prepare content for indexing;
mail.setProperty("index", QVariant::fromValue(contentToIndex));
}
void MailPropertyExtractor::newEntity(Sink::ApplicationDomain::Mail &mail)
{
updatedIndexedProperties(mail, mail.getMimeMessage());
}
void MailPropertyExtractor::modifiedEntity(const Sink::ApplicationDomain::Mail &oldMail, Sink::ApplicationDomain::Mail &newMail)
{
updatedIndexedProperties(newMail, newMail.getMimeMessage());
}
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