1 files changed, 1089 insertions, 0 deletions

diff --git a/framework/domain/mimetreeparser/interface.cpp b/framework/domain/mimetreeparser/interface.cpp
new file mode 100644
index 00000000..0bcbfec4
--- /dev/null
+++ b/framework/domain/mimetreeparser/interface.cpp
@@ -0,0 +1,1089 @@
+/*
+    Copyright (c) 2016 Sandro Knauß <knauss@kolabsystems.com>
+
+    This library is free software; you can redistribute it and/or modify it
+    under the terms of the GNU Library General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or (at your
+    option) any later version.
+
+    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 Library General Public
+    License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to the
+    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+    02110-1301, USA.
+*/
+
+#include "interface.h"
+#include "interface_p.h"
+
+#include "stringhtmlwriter.h"
+#include "objecttreesource.h"
+
+#include <Libkleo/KeyListJob>
+#include <gpgme++/key.h>
+#include <gpgme++/keylistresult.h>
+
+#include <KMime/Content>
+#include <MimeTreeParser/ObjectTreeParser>
+#include <MimeTreeParser/MessagePart>
+#include <MimeTreeParser/NodeHelper>
+
+#include <QMimeDatabase>
+#include <QMimeType>
+#include <QTextCodec>
+#include <QDebug>
+
+class MailMimePrivate
+{
+public:
+    MailMimePrivate(MailMime *p);
+
+    MailMime *q;
+    KMime::Content *mNode;
+    std::shared_ptr<MailMime> parent;
+};
+
+MailMimePrivate::MailMimePrivate(MailMime* p)
+    : q(p)
+    , mNode(nullptr)
+    , parent(nullptr)
+{
+}
+
+
+MailMime::MailMime()
+    : d(std::unique_ptr<MailMimePrivate>(new MailMimePrivate(this)))
+{
+}
+
+QByteArray MailMime::cid() const
+{
+    if (!d->mNode || !d->mNode->contentID()) {
+        return QByteArray();
+    }
+    return d->mNode->contentID()->identifier();
+}
+
+QByteArray MailMime::charset() const
+{
+    if(!d->mNode || !d->mNode->contentType(false)) {
+        return QByteArray();
+    }
+    if (d->mNode->contentType(false)) {
+        return d->mNode->contentType(false)->charset();
+    }
+    return d->mNode->defaultCharset();
+}
+
+bool MailMime::isFirstTextPart() const
+{
+    if (!d->mNode || !d->mNode->topLevel()) {
+        return false;
+    }
+    return (d->mNode->topLevel()->textContent() == d->mNode);
+}
+
+bool MailMime::isFirstPart() const
+{
+   if (!d->mNode || !d->mNode->parent()) {
+       return false;
+   }
+   return (d->mNode->parent()->contents().first() == d->mNode);
+}
+
+bool MailMime::isTopLevelPart() const
+{
+    if (!d->mNode) {
+        return false;
+    }
+    return (d->mNode->topLevel() == d->mNode);
+}
+
+MailMime::Disposition MailMime::disposition() const
+{
+    if (!d->mNode) {
+        return Invalid;
+    }
+    const auto cd = d->mNode->contentDisposition(false);
+    if (!cd) {
+        return Invalid;
+    }
+    switch (cd->disposition()){
+        case KMime::Headers::CDinline:
+            return Inline;
+        case KMime::Headers::CDattachment:
+            return Attachment;
+        default:
+            return Invalid;
+    }
+}
+
+QString MailMime::filename() const
+{
+    if (!d->mNode) {
+        return QString();
+    }
+    const auto cd = d->mNode->contentDisposition(false);
+    if (!cd) {
+        return QString();
+    }
+    return cd->filename();
+}
+
+QMimeType MailMime::mimetype() const
+{
+    if (!d->mNode) {
+        return QMimeType();
+    }
+
+    const auto ct = d->mNode->contentType(false);
+    if (!ct) {
+        return QMimeType();
+    }
+
+    QMimeDatabase mimeDb;
+    return mimeDb.mimeTypeForName(ct->mimeType());
+}
+
+MailMime::Ptr MailMime::parent() const
+{
+    if (!d->parent) {
+        d->parent = std::shared_ptr<MailMime>(new MailMime());
+        d->parent->d->mNode = d->mNode->parent();
+    }
+    return d->parent;
+}
+
+QByteArray MailMime::decodedContent() const
+{
+    if (!d->mNode) {
+        return QByteArray();
+    }
+    return d->mNode->decodedContent();
+}
+
+class KeyPrivate
+{
+public:
+    Key *q;
+    GpgME::Key mKey;
+};
+
+Key::Key()
+    :d(std::unique_ptr<KeyPrivate>(new KeyPrivate))
+{
+    d->q = this;
+}
+
+
+Key::Key(KeyPrivate *d_ptr)
+    :d(std::unique_ptr<KeyPrivate>(d_ptr))
+{
+    d->q = this;
+}
+
+Key::~Key()
+{
+
+}
+
+QString Key::keyid() const
+{
+    return d->mKey.keyID();
+}
+
+QString Key::name() const
+{
+    //FIXME: is this the correct way to get the primary UID?
+    return d->mKey.userID(0).name();
+}
+
+QString Key::email() const
+{
+    return d->mKey.userID(0).email();
+}
+
+QString Key::comment() const
+{
+    return d->mKey.userID(0).comment();
+}
+
+class SignaturePrivate
+{
+public:
+    Signature *q;
+    GpgME::Signature mSignature;
+    Key::Ptr mKey;
+};
+
+Signature::Signature()
+    :d(std::unique_ptr<SignaturePrivate>(new SignaturePrivate))
+{
+    d->q = this;
+}
+
+
+Signature::Signature(SignaturePrivate *d_ptr)
+    :d(std::unique_ptr<SignaturePrivate>(d_ptr))
+{
+    d->q = this;
+    
+}
+
+Signature::~Signature()
+{
+
+}
+
+QDateTime Signature::creationDateTime() const
+{
+    QDateTime dt;
+    dt.setTime_t(d->mSignature.creationTime());
+    return dt;
+}
+
+QDateTime Signature::expirationDateTime() const
+{
+    QDateTime dt;
+    dt.setTime_t(d->mSignature.expirationTime());
+    return dt;
+}
+
+bool Signature::neverExpires() const
+{
+    return d->mSignature.neverExpires();
+}
+
+Key::Ptr Signature::key() const
+{
+    return d->mKey;
+}
+
+class EncryptionPrivate
+{
+public:
+    Encryption *q;
+    std::vector<Key::Ptr> mRecipients;
+};
+
+Encryption::Encryption(EncryptionPrivate *d_ptr)
+    :d(std::unique_ptr<EncryptionPrivate>(d_ptr))
+{
+    d->q = this;
+}
+
+Encryption::Encryption()
+    :d(std::unique_ptr<EncryptionPrivate>(new EncryptionPrivate))
+{
+    d->q = this;
+}
+
+Encryption::~Encryption()
+{
+
+}
+
+std::vector<Key::Ptr> Encryption::recipients() const
+{
+    return d->mRecipients;
+}
+
+class PartPrivate
+{
+public:
+    PartPrivate(Part *part);
+    void appendSubPart(Part::Ptr subpart);
+
+    QVector<Part::Ptr> subParts();
+
+    Part *parent() const;
+
+    const MailMime::Ptr &mailMime() const;
+    void createMailMime(const MimeTreeParser::MimeMessagePart::Ptr &part);
+    void createMailMime(const MimeTreeParser::TextMessagePart::Ptr &part);
+    void createMailMime(const MimeTreeParser::AlternativeMessagePart::Ptr &part);
+    void createMailMime(const MimeTreeParser::HtmlMessagePart::Ptr &part);
+
+    static Encryption::Ptr createEncryption(const MimeTreeParser::EncryptedMessagePart::Ptr& part);
+    void appendEncryption(const MimeTreeParser::EncryptedMessagePart::Ptr &part);
+    static QVector<Signature::Ptr> createSignature(const MimeTreeParser::SignedMessagePart::Ptr& part);
+    void appendSignature(const MimeTreeParser::SignedMessagePart::Ptr &part);
+
+    void setSignatures(const QVector<Signature::Ptr> &sigs);
+    void setEncryptions(const QVector<Encryption::Ptr> &encs);
+
+    const QVector<Encryption::Ptr> &encryptions() const;
+    const QVector<Signature::Ptr> &signatures() const;
+private:
+    Part *q;
+    Part *mParent;
+    QVector<Part::Ptr> mSubParts;
+    QVector<Encryption::Ptr> mEncryptions;
+    QVector<Signature::Ptr> mSignatures;
+    MailMime::Ptr mMailMime;
+};
+
+PartPrivate::PartPrivate(Part* part)
+    : q(part)
+    , mParent(Q_NULLPTR)
+{
+
+}
+
+void PartPrivate::createMailMime(const MimeTreeParser::HtmlMessagePart::Ptr& part)
+{
+    mMailMime = MailMime::Ptr(new MailMime);
+    mMailMime->d->mNode = part->mNode;
+}
+
+void PartPrivate::createMailMime(const MimeTreeParser::AlternativeMessagePart::Ptr& part)
+{
+    mMailMime = MailMime::Ptr(new MailMime);
+    mMailMime->d->mNode = part->mNode;
+}
+
+void PartPrivate::createMailMime(const MimeTreeParser::TextMessagePart::Ptr& part)
+{
+    mMailMime = MailMime::Ptr(new MailMime);
+    mMailMime->d->mNode = part->mNode;
+}
+
+void PartPrivate::createMailMime(const MimeTreeParser::MimeMessagePart::Ptr& part)
+{
+    mMailMime = MailMime::Ptr(new MailMime);
+    mMailMime->d->mNode = part->mNode;
+}
+
+void PartPrivate::appendSubPart(Part::Ptr subpart)
+{
+    subpart->d->mParent = q;
+    mSubParts.append(subpart);
+}
+
+Encryption::Ptr PartPrivate::createEncryption(const MimeTreeParser::EncryptedMessagePart::Ptr& part)
+{
+    Kleo::KeyListJob *job = part->mCryptoProto->keyListJob(false);    // local, no sigs
+    if (!job) {
+        qWarning() << "The Crypto backend does not support listing keys. ";
+        return Encryption::Ptr();
+    }
+
+    auto encpriv = new EncryptionPrivate();
+    foreach(const auto &recipient, part->mDecryptRecipients) {
+        std::vector<GpgME::Key> found_keys;
+        const auto &keyid = recipient.keyID();
+        GpgME::KeyListResult res = job->exec(QStringList(QLatin1String(keyid)), false, found_keys);
+        if (res.error()) {
+            qWarning() << "Error while searching key for Fingerprint: " << keyid;
+            continue;
+        }
+        if (found_keys.size() > 1) {
+            // Should not Happen
+            qWarning() << "Oops: Found more then one Key for Fingerprint: " << keyid;
+        }
+        if (found_keys.size() != 1) {
+            // Should not Happen at this point
+            qWarning() << "Oops: Found no Key for Fingerprint: " << keyid;
+        } else {
+            auto key = found_keys[0];
+            auto keypriv = new KeyPrivate;
+            keypriv->mKey = key;
+            encpriv->mRecipients.push_back(Key::Ptr(new Key(keypriv)));
+        }
+    }
+    return Encryption::Ptr(new Encryption(encpriv));
+}
+
+void PartPrivate::appendEncryption(const MimeTreeParser::EncryptedMessagePart::Ptr& part)
+{
+    mEncryptions.append(createEncryption(part));
+}
+
+void PartPrivate::setEncryptions(const QVector< Encryption::Ptr >& encs)
+{
+    mEncryptions = encs;
+}
+
+QVector<Signature::Ptr> PartPrivate::createSignature(const MimeTreeParser::SignedMessagePart::Ptr& part)
+{
+    QVector<Signature::Ptr> sigs;
+    Kleo::KeyListJob *job = part->mCryptoProto->keyListJob(false);    // local, no sigs
+    if (!job) {
+        qWarning() << "The Crypto backend does not support listing keys. ";
+        return sigs;
+    }
+
+    foreach(const auto &sig, part->mSignatures) {
+        auto sigpriv = new SignaturePrivate();
+        sigpriv->mSignature = sig;
+        auto signature = std::make_shared<Signature>(sigpriv);
+        sigs.append(signature);
+
+        std::vector<GpgME::Key> found_keys;
+        const auto &keyid = sig.fingerprint();
+        GpgME::KeyListResult res = job->exec(QStringList(QLatin1String(keyid)), false, found_keys);
+        if (res.error()) {
+            qWarning() << "Error while searching key for Fingerprint: " << keyid;
+            continue;
+        }
+        if (found_keys.size() > 1) {
+            // Should not Happen
+            qWarning() << "Oops: Found more then one Key for Fingerprint: " << keyid;
+            continue;
+        }
+        if (found_keys.size() != 1) {
+            // Should not Happen at this point
+            qWarning() << "Oops: Found no Key for Fingerprint: " << keyid;
+            continue;
+        } else {
+            auto key = found_keys[0];
+            auto keypriv = new KeyPrivate;
+            keypriv->mKey = key;
+            sigpriv->mKey = Key::Ptr(new Key(keypriv));
+        }
+    }
+    return sigs;
+}
+
+void PartPrivate::appendSignature(const MimeTreeParser::SignedMessagePart::Ptr& part)
+{
+    mSignatures.append(createSignature(part));
+}
+
+
+void PartPrivate::setSignatures(const QVector< Signature::Ptr >& sigs)
+{
+    mSignatures = sigs;
+}
+
+Part *PartPrivate::parent() const
+{
+    return mParent;
+}
+
+QVector< Part::Ptr > PartPrivate::subParts()
+{
+    return mSubParts;
+}
+
+const MailMime::Ptr& PartPrivate::mailMime() const
+{
+    return mMailMime;
+}
+
+const QVector< Encryption::Ptr >& PartPrivate::encryptions() const
+{
+    return mEncryptions;
+}
+
+const QVector< Signature::Ptr >& PartPrivate::signatures() const
+{
+    return mSignatures;
+}
+
+Part::Part()
+    : d(std::unique_ptr<PartPrivate>(new PartPrivate(this)))
+{
+
+}
+
+bool Part::hasSubParts() const
+{
+    return !subParts().isEmpty();
+}
+
+QVector<Part::Ptr> Part::subParts() const
+{
+    return d->subParts();
+}
+
+QByteArray Part::type() const
+{
+    return "Part";
+}
+
+QVector<QByteArray> Part::availableContents() const
+{
+    return QVector<QByteArray>();
+}
+
+QVector<Content::Ptr> Part::content() const
+{
+    return content(availableContents().first());
+}
+
+QVector<Content::Ptr> Part::content(const QByteArray& ct) const
+{
+    return QVector<Content::Ptr>();
+}
+
+QVector<Encryption::Ptr> Part::encryptions() const
+{
+    auto ret = d->encryptions();
+    auto parent = d->parent();
+    if (parent) {
+        ret.append(parent->encryptions());
+    }
+    return ret;
+}
+
+QVector<Signature::Ptr> Part::signatures() const
+{
+    auto ret = d->signatures();
+    auto parent = d->parent();
+    if (parent) {
+        ret.append(parent->signatures());
+    }
+    return ret;
+}
+
+MailMime::Ptr Part::mailMime() const
+{
+    return d->mailMime();
+}
+
+Part *Part::parent() const
+{
+    return d->parent();
+}
+
+class ContentPrivate
+{
+public:
+    QByteArray mContent;
+    QByteArray mCodec;
+    Part *mParent;
+    Content *q;
+    MailMime::Ptr mMailMime;
+    QVector<Encryption::Ptr> mEncryptions;
+    QVector<Signature::Ptr> mSignatures;
+    void appendSignature(const MimeTreeParser::SignedMessagePart::Ptr &sig);
+    void appendEncryption(const MimeTreeParser::EncryptedMessagePart::Ptr &enc);
+};
+
+void ContentPrivate::appendEncryption(const MimeTreeParser::EncryptedMessagePart::Ptr& enc)
+{
+    mEncryptions.append(PartPrivate::createEncryption(enc));
+}
+
+void ContentPrivate::appendSignature(const MimeTreeParser::SignedMessagePart::Ptr& sig)
+{
+    mSignatures.append(PartPrivate::createSignature(sig));
+}
+
+
+Content::Content(const QByteArray& content, Part *parent)
+    : d(std::unique_ptr<ContentPrivate>(new ContentPrivate))
+{
+    d->q = this;
+    d->mContent = content;
+    d->mCodec = "utf-8";
+    d->mParent = parent;
+}
+
+Content::Content(ContentPrivate* d_ptr)
+    : d(std::unique_ptr<ContentPrivate>(d_ptr))
+{
+    d->q = this;
+}
+
+Content::~Content()
+{
+}
+
+QVector<Encryption::Ptr> Content::encryptions() const
+{
+    auto ret = d->mEncryptions;
+    if (d->mParent) {
+        ret.append(d->mParent->encryptions());
+    }
+    return ret;
+}
+
+QVector<Signature::Ptr> Content::signatures() const
+{
+    auto ret = d->mSignatures;
+    if (d->mParent) {
+        ret.append(d->mParent->signatures());
+    }
+    return ret;
+}
+
+QByteArray Content::content() const
+{
+    return d->mContent;
+}
+
+QByteArray Content::charset() const
+{
+    return d->mCodec;
+}
+
+QString Content::encodedContent() const
+{
+    return encodedContent(charset());
+}
+
+QString Content::encodedContent(const QByteArray &charset) const
+{
+    QTextCodec *codec = QTextCodec::codecForName(charset);
+    return codec->toUnicode(content());
+}
+
+QByteArray Content::type() const
+{
+    return "Content";
+}
+
+MailMime::Ptr Content::mailMime() const
+{
+    if (d->mMailMime) {
+        return d->mMailMime;
+    } else {
+        return d->mParent->mailMime();
+    }
+}
+
+Part *Content::parent() const
+{
+    return d->mParent;
+}
+
+HtmlContent::HtmlContent(const QByteArray& content, Part* parent)
+    : Content(content, parent)
+{
+
+}
+
+QByteArray HtmlContent::type() const
+{
+    return "HtmlContent";
+}
+
+PlainTextContent::PlainTextContent(const QByteArray& content, Part* parent)
+    : Content(content, parent)
+{
+
+}
+
+PlainTextContent::PlainTextContent(ContentPrivate* d_ptr)
+    : Content(d_ptr)
+{
+
+}
+
+HtmlContent::HtmlContent(ContentPrivate* d_ptr)
+    : Content(d_ptr)
+{
+
+}
+
+
+QByteArray PlainTextContent::type() const
+{
+    return "PlainTextContent";
+}
+
+class AlternativePartPrivate
+{
+public:
+    void fillFrom(MimeTreeParser::AlternativeMessagePart::Ptr part);
+
+    QVector<Content::Ptr> content(const QByteArray &ct) const;
+
+    AlternativePart *q;
+
+    QVector<QByteArray> types() const;
+
+private:
+    QMap<QByteArray, QVector<Content::Ptr>> mContent;
+    QVector<QByteArray> mTypes;
+};
+
+void AlternativePartPrivate::fillFrom(MimeTreeParser::AlternativeMessagePart::Ptr part)
+{
+    mTypes = QVector<QByteArray>() << "html" << "plaintext";
+
+    Content::Ptr content = std::make_shared<HtmlContent>(part->htmlContent().toLocal8Bit(), q);
+    mContent["html"].append(content);
+    content = std::make_shared<PlainTextContent>(part->plaintextContent().toLocal8Bit(), q);
+    mContent["plaintext"].append(content);
+    q->reachParentD()->createMailMime(part);
+}
+
+QVector<QByteArray> AlternativePartPrivate::types() const
+{
+    return mTypes;
+}
+
+QVector<Content::Ptr> AlternativePartPrivate::content(const QByteArray& ct) const
+{
+    return mContent[ct];
+}
+
+AlternativePart::AlternativePart()
+    : d(std::unique_ptr<AlternativePartPrivate>(new AlternativePartPrivate))
+{
+    d->q = this;
+}
+
+AlternativePart::~AlternativePart()
+{
+
+}
+
+QByteArray AlternativePart::type() const
+{
+    return "AlternativePart";
+}
+
+QVector<QByteArray> AlternativePart::availableContents() const
+{
+    return d->types();
+}
+
+QVector<Content::Ptr> AlternativePart::content(const QByteArray& ct) const
+{
+    return d->content(ct);
+}
+
+PartPrivate* AlternativePart::reachParentD() const
+{
+    return Part::d.get();
+}
+
+class SinglePartPrivate
+{
+public:
+    void fillFrom(MimeTreeParser::TextMessagePart::Ptr part);
+    void fillFrom(MimeTreeParser::HtmlMessagePart::Ptr part);
+    void fillFrom(MimeTreeParser::AttachmentMessagePart::Ptr part);
+    SinglePart *q;
+
+    QVector<Content::Ptr> mContent;
+    QByteArray mType;
+};
+
+void SinglePartPrivate::fillFrom(MimeTreeParser::TextMessagePart::Ptr part)
+{
+    mType = "plaintext";
+    mContent.clear();
+    foreach (const auto &mp, part->subParts()) {
+        auto d_ptr = new ContentPrivate;
+        d_ptr->mContent = mp->text().toLocal8Bit();
+        d_ptr->mParent = q;
+        const auto enc = mp.dynamicCast<MimeTreeParser::EncryptedMessagePart>();
+        auto sig = mp.dynamicCast<MimeTreeParser::SignedMessagePart>();
+        if (enc) {
+           d_ptr->appendEncryption(enc);
+           const auto s = enc->subParts();
+           if (s.size() == 1) {
+               sig = s[0].dynamicCast<MimeTreeParser::SignedMessagePart>();
+           }
+        }
+        if (sig) {
+           d_ptr->appendSignature(sig);
+        }
+        mContent.append(std::make_shared<PlainTextContent>(d_ptr));
+        q->reachParentD()->createMailMime(part);
+        d_ptr->mCodec = q->mailMime()->charset();
+    }
+}
+
+void SinglePartPrivate::fillFrom(MimeTreeParser::HtmlMessagePart::Ptr part)
+{
+    mType = "html";
+    mContent.clear();
+    mContent.append(std::make_shared<HtmlContent>(part->text().toLocal8Bit(), q));
+    q->reachParentD()->createMailMime(part);
+}
+
+void SinglePartPrivate::fillFrom(MimeTreeParser::AttachmentMessagePart::Ptr part)
+{
+   q->reachParentD()->createMailMime(part.staticCast<MimeTreeParser::TextMessagePart>());
+   mType = q->mailMime()->mimetype().name().toUtf8();
+   mContent.clear();
+   mContent.append(std::make_shared<Content>(q->mailMime()->decodedContent(), q));
+}
+
+SinglePart::SinglePart()
+    : d(std::unique_ptr<SinglePartPrivate>(new SinglePartPrivate))
+{
+    d->q = this;
+}
+
+SinglePart::~SinglePart()
+{
+
+}
+
+QVector<QByteArray> SinglePart::availableContents() const
+{
+    return QVector<QByteArray>() << d->mType;
+}
+
+QVector< Content::Ptr > SinglePart::content(const QByteArray &ct) const
+{
+    if (ct == d->mType) {
+        return d->mContent;
+    }
+    return QVector<Content::Ptr>();
+}
+
+QByteArray SinglePart::type() const
+{
+    return "SinglePart";
+}
+
+PartPrivate* SinglePart::reachParentD() const
+{
+    return Part::d.get();
+}
+
+ParserPrivate::ParserPrivate(Parser* parser)
+    : q(parser)
+    , mNodeHelper(std::make_shared<MimeTreeParser::NodeHelper>())
+{
+
+}
+
+void ParserPrivate::setMessage(const QByteArray& mimeMessage)
+{
+    const auto mailData = KMime::CRLFtoLF(mimeMessage);
+    mMsg = KMime::Message::Ptr(new KMime::Message);
+    mMsg->setContent(mailData);
+    mMsg->parse();
+
+    // render the mail
+    StringHtmlWriter htmlWriter;
+    ObjectTreeSource source(&htmlWriter);
+    MimeTreeParser::ObjectTreeParser otp(&source, mNodeHelper.get());
+
+    otp.parseObjectTree(mMsg.data());
+    mPartTree = otp.parsedPart().dynamicCast<MimeTreeParser::MessagePart>();
+
+    mEmbeddedPartMap = htmlWriter.embeddedParts();
+    mHtml = htmlWriter.html();
+
+    mTree = std::make_shared<Part>();
+    createTree(mPartTree, mTree);
+}
+
+
+void ParserPrivate::createTree(const MimeTreeParser::MessagePart::Ptr &start, const Part::Ptr &tree)
+{
+    foreach (const auto &mp, start->subParts()) {
+        const auto m = mp.dynamicCast<MimeTreeParser::MessagePart>();
+        const auto text = mp.dynamicCast<MimeTreeParser::TextMessagePart>();
+        const auto alternative = mp.dynamicCast<MimeTreeParser::AlternativeMessagePart>();
+        const auto html = mp.dynamicCast<MimeTreeParser::HtmlMessagePart>();
+        const auto attachment = mp.dynamicCast<MimeTreeParser::AttachmentMessagePart>();
+         if (attachment) {
+            auto part = std::make_shared<SinglePart>();
+            part->d->fillFrom(attachment);
+            tree->d->appendSubPart(part);
+         } else if (text) {
+            auto part = std::make_shared<SinglePart>();
+            part->d->fillFrom(text);
+            tree->d->appendSubPart(part);
+        } else if (alternative) {
+            auto part = std::make_shared<AlternativePart>();
+            part->d->fillFrom(alternative);
+            tree->d->appendSubPart(part);
+        } else if (html) {
+            auto part = std::make_shared<SinglePart>();
+            part->d->fillFrom(html);
+            tree->d->appendSubPart(part);
+        } else {
+            const auto enc = mp.dynamicCast<MimeTreeParser::EncryptedMessagePart>();
+            const auto sig = mp.dynamicCast<MimeTreeParser::SignedMessagePart>();
+            if (enc || sig) {
+                auto subTree =  std::make_shared<Part>();
+                if (enc) {
+                    subTree->d->appendEncryption(enc);
+                }
+                if (sig) {
+                    subTree->d->appendSignature(sig);
+                }
+                createTree(m, subTree);
+                foreach(const auto &p, subTree->subParts()) {
+                    tree->d->appendSubPart(p);
+                    if (enc) {
+                        p->d->setEncryptions(subTree->d->encryptions());
+                    }
+                    if (sig) {
+                        p->d->setSignatures(subTree->d->signatures());
+                    }
+                }
+            } else {
+                createTree(m, tree);
+            }
+        }
+    }
+}
+
+Parser::Parser(const QByteArray& mimeMessage)
+    :d(std::unique_ptr<ParserPrivate>(new ParserPrivate(this)))
+{
+    d->setMessage(mimeMessage);
+}
+
+Parser::~Parser()
+{
+}
+
+Part::Ptr Parser::getPart(const QUrl &url)
+{
+    if (url.scheme() == QStringLiteral("cid") && !url.path().isEmpty()) {
+        const auto cid = url.path();
+        return find(d->mTree, [&cid](const Part::Ptr &p){
+             const auto mime = p->mailMime();
+             return mime->cid() == cid;
+        });
+    }
+    return Part::Ptr();
+}
+
+QVector<Part::Ptr> Parser::collectContentParts() const
+{
+    return collect(d->mTree, [](const Part::Ptr &p){return p->type() != "EncapsulatedPart";},
+                             [](const Content::Ptr &content){
+                                    const auto mime = content->mailMime();
+
+                                    if (!mime) {
+                                        return true;
+                                    }
+
+                                    if (mime->isFirstTextPart()) {
+                                        return true;
+                                    }
+
+                                    {
+                                        auto _mime = content->parent()->mailMime();
+                                        while (_mime) {
+                                            if (_mime && (_mime->isTopLevelPart() || _mime->isFirstTextPart())) {
+                                                return true;
+                                            }
+                                            if (_mime->isFirstPart()) {
+                                                _mime = _mime->parent();
+                                            } else {
+                                                break;
+                                            }
+                                        }
+                                    }
+                                    const auto cd = mime->disposition();
+                                    if (cd && cd == MailMime::Inline) {
+                                        // explict "inline" disposition:
+                                        return true;
+                                    }
+                                    if (cd && cd == MailMime::Attachment) {
+                                        // explicit "attachment" disposition:
+                                        return false;
+                                    }
+
+                                    const auto ct = mime->mimetype();
+                                    if (ct.name().trimmed().toLower() == "text" && ct.name().trimmed().isEmpty() &&
+                                        (!mime || mime->filename().trimmed().isEmpty())) {
+                                        // text/* w/o filename parameter:
+                                        return true;
+                                    }
+                                    return false;
+                             });
+}
+
+
+QVector<Part::Ptr> Parser::collectAttachmentParts() const
+{
+    return collect(d->mTree, [](const Part::Ptr &p){return p->type() != "EncapsulatedPart";},
+                             [](const Content::Ptr &content){
+                                    const auto mime = content->mailMime();
+
+                                    if (!mime) {
+                                        return false;
+                                    }
+
+                                    if (mime->isFirstTextPart()) {
+                                        return false;
+                                    }
+
+                                    {
+                                        QMimeDatabase mimeDb;
+                                        auto _mime = content->parent()->mailMime();
+                                        const auto parent = _mime->parent();
+                                        if (parent) {
+                                            const auto mimetype = parent->mimetype();
+                                            if (mimetype == mimeDb.mimeTypeForName("multipart/related")) {
+                                                return false;
+                                            }
+                                        }
+                                        while (_mime) {
+                                            if (_mime && (_mime->isTopLevelPart() || _mime->isFirstTextPart())) {
+                                                return false;
+                                            }
+                                            if (_mime->isFirstPart()) {
+                                                _mime = _mime->parent();
+                                            } else {
+                                                break;
+                                            }
+                                        }
+                                    }
+                                    const auto cd = mime->disposition();
+                                    if (cd && cd == MailMime::Inline) {
+                                        // explict "inline" disposition:
+                                        return false;
+                                    }
+                                    if (cd && cd == MailMime::Attachment) {
+                                        // explicit "attachment" disposition:
+                                        return true;
+                                    }
+
+                                    const auto ct = mime->mimetype();
+                                    if (ct.name().trimmed().toLower() == "text" && ct.name().trimmed().isEmpty() &&
+                                        (!mime || mime->filename().trimmed().isEmpty())) {
+                                        // text/* w/o filename parameter:
+                                        return false;
+                                    }
+                                    return true;
+                             });
+}
+
+QVector<Part::Ptr> Parser::collect(const Part::Ptr &start, std::function<bool(const Part::Ptr &)> select, std::function<bool(const Content::Ptr &)> filter) const
+{
+    QVector<Part::Ptr> ret;
+    foreach (const auto &part, start->subParts()) {
+        QVector<QByteArray> contents;
+        foreach(const auto &ct, part->availableContents()) {
+            foreach(const auto &content, part->content(ct)) {
+                if (filter(content)) {
+                    contents.append(ct);
+                    break;
+                }
+            }
+        }
+        if (!contents.isEmpty()) {
+            ret.append(part);
+        }
+        if (select(part)){
+            ret += collect(part, select, filter);
+        }
+    }
+    return ret;
+}
+
+Part::Ptr Parser::find(const Part::Ptr &start, std::function<bool(const Part::Ptr &)> select) const
+{
+    foreach (const auto &part, start->subParts()) {
+        if (select(part)) {
+            return part;
+        }
+        const auto ret = find(part, select);
+        if (ret) {
+            return ret;
+        }
+    }
+    return Part::Ptr();
+}