qt: Add GpgCardJob following the job pattern

* lang/qt/src/Makefile.am: Add new files.
* lang/qt/src/job.cpp (GpgCardJob): Add impl stuff.
* lang/qt/src/protocol.h (gpgCardJob): Get one.
* lang/qt/src/qgpgmebackend.cpp,
lang/qt/src/qgpgmebackend.h: Add helpers to get the job.
* lang/qt/src/qgpgmegpgcardjob.cpp,
lang/qt/src/gpgcardjob.h,
lang/qt/src/qgpgmegpgcardjob.h: New.

--
This is annoyingly complex to add a simple new job.
In the future we should implement something like this
without the threadedjobmixin stuff. But the idea was
to follow the usual job pattern.

GnuPG-Bug-Id: T4794

9 files changed, 322 insertions, 2 deletions

diff --git a/NEWS b/NEWS
index dc9e0ff8..d87bc4ff 100644
--- a/NEWS
+++ b/NEWS
@@ -11,6 +11,8 @@ Noteworthy changes in version 1.14.0 (unreleased)
  * qt: Extended signkeyjob to handle remarks and multiple signatures.
    [#4734]
 
+ * qt: Added job API for gpg-card.
+
  * Interface changes relative to the 1.13.1 release:
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  gpgme_user_id_t                         EXTENDED: New field 'uidhash'.
@@ -19,6 +21,7 @@ Noteworthy changes in version 1.14.0 (unreleased)
  cpp: GpgSignKeyEditInteractor::setDupeOk     NEW.
  qt: SignKeyJob::setDupeOk                    NEW.
  qt: SignKeyJob::setRemark                    NEW.
+ qt: GpgCardJob                               NEW.
 
 
 Noteworthy changes in version 1.13.1 (2019-06-13)
diff --git a/lang/qt/src/Makefile.am b/lang/qt/src/Makefile.am
index 80dcde15..cbf6a530 100644
--- a/lang/qt/src/Makefile.am
+++ b/lang/qt/src/Makefile.am
@@ -38,6 +38,7 @@ qgpgme_sources = \
     qgpgmekeyformailboxjob.cpp gpgme_backend_debug.cpp \
     qgpgmetofupolicyjob.cpp qgpgmequickjob.cpp \
     defaultkeygenerationjob.cpp qgpgmewkspublishjob.cpp \
+    qgpgmegpgcardjob.cpp \
     dn.cpp cryptoconfig.cpp
 
 # If you add one here make sure that you also add one in camelcase
@@ -78,6 +79,7 @@ qgpgme_headers= \
     defaultkeygenerationjob.h \
     tofupolicyjob.h \
     wkspublishjob.h \
+    gpgcardjob.h \
     dn.h
 
 camelcase_headers= \
@@ -116,7 +118,8 @@ camelcase_headers= \
     KeyForMailboxJob \
     DefaultKeyGenerationJob \
     WKSPublishJob \
-    TofuPolicyJob
+    TofuPolicyJob \
+    GpgCardJob
 
 private_qgpgme_headers = \
     qgpgme_export.h \
@@ -147,6 +150,7 @@ private_qgpgme_headers = \
     qgpgmekeyformailboxjob.h \
     qgpgmewkspublishjob.h \
     qgpgmetofupolicyjob.h \
+    qgpgmegpgcardjob.h \
     qgpgmequickjob.h \
     threadedjobmixin.h
 
@@ -207,7 +211,9 @@ qgpgme_moc_sources = \
     qgpgmekeyformailboxjob.moc \
     defaultkeygenerationjob.moc \
     quickjob.moc \
-    qgpgmequickjob.moc
+    qgpgmequickjob.moc \
+    gpgcardjob.moc \
+    qgpgmegpgcardjob.moc
 
 qgpgmeincludedir = $(includedir)/qgpgme
 qgpgmeinclude_HEADERS = $(qgpgme_headers)
diff --git a/lang/qt/src/gpgcardjob.h b/lang/qt/src/gpgcardjob.h
new file mode 100644
index 00000000..63f5cf7c
--- /dev/null
+++ b/lang/qt/src/gpgcardjob.h
@@ -0,0 +1,92 @@
+/*
+    gpgcardjob.h
+
+    This file is part of qgpgme, the Qt API binding for gpgme
+    Copyright (c) 2020 g10 Code GmbH
+
+    QGpgME 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.
+
+    QGpgME 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
+
+    In addition, as a special exception, the copyright holders give
+    permission to link the code of this program with any edition of
+    the Qt library by Trolltech AS, Norway (or with modified versions
+    of Qt that use the same license as Qt), and distribute linked
+    combinations including the two.  You must obey the GNU General
+    Public License in all respects for all of the code used other than
+    Qt.  If you modify this file, you may extend this exception to
+    your version of the file, but you are not obligated to do so.  If
+    you do not wish to do so, delete this exception statement from
+    your version.
+*/
+#ifndef __KLEO_GPGCARDJOB_H__
+#define __KLEO_GPGCARDJOB_H__
+
+#include <QStringList>
+
+#include "job.h"
+
+namespace GpgME
+{
+class Error;
+}
+
+namespace QGpgME
+{
+
+/**
+   @short Get the best key to use for a Mailbox
+
+   To use the keyformailboxjob, first obtain an instance from the
+   CryptoBackend and either exec it or start and
+   conncet the result() signals to a suitable slot.
+   The job will be automatically deleted in which
+   case the KeylistJob instance will have schedules it's own
+   destruction with a call to QObject::deleteLater().
+
+   The best key is defined as the key with a UID that has an
+   E-Mail that matches the mailbox provided. If multiple
+   keys are found the one with the highest validity is returned.
+
+   After result() is emitted, the
+   KeyListJob will schedule it's own destruction by calling
+   QObject::deleteLater().
+*/
+class QGPGME_EXPORT GpgCardJob: public Job
+{
+    Q_OBJECT
+protected:
+    explicit GpgCardJob(QObject *parent);
+
+public:
+    ~GpgCardJob();
+
+    /**
+      Starts the operation. \a cmds are the commands to
+      execute.
+    */
+    virtual GpgME::Error start(const QStringList &cmds) = 0;
+
+    virtual GpgME::Error exec(const QStringList &cmds, QString &std_out, QString &std_err, int &exitCode) = 0;
+
+Q_SIGNALS:
+    /** The resulting stdout and stderr of gpgcard and the exitCode
+     *
+     * The auditlog params are always null / empty.
+     */
+    void result(const QString &std_out, const QString &std_err, int exitCode,
+                const QString &auditLogAsHtml = QString(), const GpgME::Error &auditLogError = GpgME::Error());
+};
+
+}
+#endif
diff --git a/lang/qt/src/job.cpp b/lang/qt/src/job.cpp
index c4270205..8ed0b576 100644
--- a/lang/qt/src/job.cpp
+++ b/lang/qt/src/job.cpp
@@ -65,6 +65,7 @@
 #include "tofupolicyjob.h"
 #include "threadedjobmixin.h"
 #include "quickjob.h"
+#include "gpgcardjob.h"
 
 #include <QCoreApplication>
 #include <QDebug>
@@ -141,6 +142,7 @@ make_job_subclass(KeyForMailboxJob)
 make_job_subclass(WKSPublishJob)
 make_job_subclass(TofuPolicyJob)
 make_job_subclass(QuickJob)
+make_job_subclass(GpgCardJob)
 
 #undef make_job_subclass
 
@@ -173,3 +175,4 @@ make_job_subclass(QuickJob)
 #include "wkspublishjob.moc"
 #include "tofupolicyjob.moc"
 #include "quickjob.moc"
+#include "gpgcardjob.moc"
diff --git a/lang/qt/src/protocol.h b/lang/qt/src/protocol.h
index 1a52097e..17db68a5 100644
--- a/lang/qt/src/protocol.h
+++ b/lang/qt/src/protocol.h
@@ -67,6 +67,7 @@ class KeyForMailboxJob;
 class WKSPublishJob;
 class TofuPolicyJob;
 class QuickJob;
+class GpgCardJob;
 
 /** The main entry point for QGpgME Comes in OpenPGP and SMIME(CMS) flavors.
  *
@@ -184,5 +185,12 @@ QGPGME_EXPORT Protocol *smime();
  */
 QGPGME_EXPORT CryptoConfig *cryptoConfig();
 
+/** Obtain a reference to a protocol agnostic GpgCardJob.
+ *
+ * The reference is to a static object.
+ * @returns reference to a GpgCardJob following the job pattern.
+ */
+QGPGME_EXPORT GpgCardJob *gpgCardJob();
+
 }
 #endif
diff --git a/lang/qt/src/qgpgmebackend.cpp b/lang/qt/src/qgpgmebackend.cpp
index f7393f09..aa96db0d 100644
--- a/lang/qt/src/qgpgmebackend.cpp
+++ b/lang/qt/src/qgpgmebackend.cpp
@@ -38,6 +38,7 @@
 
 #include "qgpgmebackend.h"
 
+#include "qgpgmegpgcardjob.h"
 
 #include "error.h"
 #include "engineinfo.h"
@@ -86,6 +87,11 @@ QGpgME::CryptoConfig *QGpgME::QGpgMEBackend::config() const
     return mCryptoConfig;
 }
 
+QGpgME::GpgCardJob *QGpgME::QGpgMEBackend::gpgCardJob() const
+{
+    return new QGpgME::QGpgMEGpgCardJob();
+}
+
 static bool check(GpgME::Protocol proto, QString *reason)
 {
     if (!GpgME::checkEngine(proto)) {
@@ -206,3 +212,11 @@ QGpgME::Protocol *QGpgME::smime()
     }
     return gpgmeBackend->smime();
 }
+
+QGpgME::GpgCardJob *QGpgME::gpgCardJob ()
+{
+    if (!gpgmeBackend) {
+        gpgmeBackend = new QGpgME::QGpgMEBackend();
+    }
+    return gpgmeBackend->gpgCardJob();
+}
diff --git a/lang/qt/src/qgpgmebackend.h b/lang/qt/src/qgpgmebackend.h
index a69b09a8..6c655e96 100644
--- a/lang/qt/src/qgpgmebackend.h
+++ b/lang/qt/src/qgpgmebackend.h
@@ -46,6 +46,7 @@ namespace QGpgME
 {
 class CryptoConfig;
 class Protocol;
+class GpgCardJob;
 
 
 class QGpgMEBackend
@@ -58,6 +59,7 @@ public:
     QString displayName() const;
 
     CryptoConfig *config() const;
+    GpgCardJob *gpgCardJob() const;
 
     Protocol *openpgp() const;
     Protocol *smime() const;
diff --git a/lang/qt/src/qgpgmegpgcardjob.cpp b/lang/qt/src/qgpgmegpgcardjob.cpp
new file mode 100644
index 00000000..a01ae604
--- /dev/null
+++ b/lang/qt/src/qgpgmegpgcardjob.cpp
@@ -0,0 +1,129 @@
+/*
+    qgpgmekeyformailboxjob.cpp
+
+    This file is part of qgpgme, the Qt API binding for gpgme
+    Copyright (c) 2016 by Bundesamt für Sicherheit in der Informationstechnik
+    Software engineering by Intevation GmbH
+
+    QGpgME 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.
+
+    QGpgME 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
+
+    In addition, as a special exception, the copyright holders give
+    permission to link the code of this program with any edition of
+    the Qt library by Trolltech AS, Norway (or with modified versions
+    of Qt that use the same license as Qt), and distribute linked
+    combinations including the two.  You must obey the GNU General
+    Public License in all respects for all of the code used other than
+    Qt.  If you modify this file, you may extend this exception to
+    your version of the file, but you are not obligated to do so.  If
+    you do not wish to do so, delete this exception statement from
+    your version.
+*/
+
+#ifdef HAVE_CONFIG_H
+ #include "config.h"
+#endif
+
+#include "qgpgmegpgcardjob.h"
+
+#include <QStringList>
+#include <QFileInfo>
+#include <QDir>
+#include <QProcess>
+#include "util.h"
+
+/* We cannot have a timeout because key generation can
+ * take ages. Well maybe 10 minutes. */
+#define TIMEOUT_VALUE (600000)
+
+#include <tuple>
+
+using namespace GpgME;
+using namespace QGpgME;
+
+QGpgMEGpgCardJob::QGpgMEGpgCardJob()
+    : mixin_type(nullptr)
+{
+    lateInitialization();
+}
+
+QGpgMEGpgCardJob::~QGpgMEGpgCardJob() {}
+
+static QString getGpgCardPath()
+{
+    auto bindir = QString::fromLocal8Bit(dirInfo("bindir"));
+    if (bindir.isEmpty()) {
+        return QString();
+    }
+
+    const QFileInfo fi(QDir(bindir).absoluteFilePath(QStringLiteral("gpg-card")));
+    if (fi.exists() && fi.isExecutable()) {
+        return fi.absoluteFilePath();
+    }
+    return QString();
+}
+
+static QGpgMEGpgCardJob::result_type do_work(const QStringList &cmds, const QString &path)
+{
+    QStringList args;
+    args << QStringLiteral("--with-colons");
+    args += cmds;
+
+    QProcess proc;
+
+    proc.setProgram(path);
+    proc.setArguments(args);
+    proc.start();
+    if (!proc.waitForStarted()) {
+        return std::make_tuple (QString(), QString(), 1, QString(), Error());
+    }
+
+    if (!proc.waitForFinished(TIMEOUT_VALUE)) {
+        return std::make_tuple (QString(), QString(), 1, QString(), Error());
+    }
+    if (proc.exitStatus() == QProcess::NormalExit) {
+        return std::make_tuple (QString::fromUtf8(proc.readAllStandardOutput()),
+                                QString::fromUtf8(proc.readAllStandardError()), proc.exitCode(),
+                                QString(), Error());
+    }
+    return std::make_tuple (QString::fromUtf8(proc.readAllStandardOutput()),
+            QString::fromUtf8(proc.readAllStandardError()), 1,
+            QString(), Error());
+}
+
+Error QGpgMEGpgCardJob::start(const QStringList &cmds)
+{
+    const auto cardpath = getGpgCardPath ();
+    if (cardpath.isEmpty()) {
+        return Error(make_error(GPG_ERR_NOT_SUPPORTED));
+    }
+    run(std::bind(&do_work, cmds, cardpath));
+    return Error();
+}
+
+Error QGpgMEGpgCardJob::exec(const QStringList &cmds, QString &std_out, QString &std_err, int &exitCode)
+{
+    const auto cardpath = getGpgCardPath ();
+    if (cardpath.isEmpty()) {
+        return Error(make_error(GPG_ERR_NOT_SUPPORTED));
+    }
+    const result_type r = do_work(cmds, cardpath);
+    resultHook(r);
+    std_out = std::get<0>(r);
+    std_err = std::get<1>(r);
+    exitCode = std::get<2>(r);
+    return exitCode == 0 ? Error() : Error(make_error(GPG_ERR_GENERAL));
+}
+
+#include "qgpgmegpgcardjob.moc"
diff --git a/lang/qt/src/qgpgmegpgcardjob.h b/lang/qt/src/qgpgmegpgcardjob.h
new file mode 100644
index 00000000..bed68b2d
--- /dev/null
+++ b/lang/qt/src/qgpgmegpgcardjob.h
@@ -0,0 +1,63 @@
+/*  qgpgmegpgcardjob.h
+
+    This file is part of libkleopatra, the KDE keymanagement library
+    Copyright (c) 2020 g10 Code GmbH
+
+    QGpgME 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.
+
+    QGpgME 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
+
+    In addition, as a special exception, the copyright holders give
+    permission to link the code of this program with any edition of
+    the Qt library by Trolltech AS, Norway (or with modified versions
+    of Qt that use the same license as Qt), and distribute linked
+    combinations including the two.  You must obey the GNU General
+    Public License in all respects for all of the code used other than
+    Qt.  If you modify this file, you may extend this exception to
+    your version of the file, but you are not obligated to do so.  If
+    you do not wish to do so, delete this exception statement from
+    your version.
+*/
+
+#ifndef __QGPGME_QGPGMEGPGCARDJOB_H__
+#define __QGPGME_QGPGMEGPGCARDJOB_H__
+#include "gpgcardjob.h"
+
+#include "threadedjobmixin.h"
+
+namespace QGpgME
+{
+
+class QGpgMEGpgCardJob
+#ifdef Q_MOC_RUN
+    : public GpgCardJob
+#else
+    : public _detail::ThreadedJobMixin<GpgCardJob, std::tuple<QString, QString, int, QString, GpgME::Error> >
+#endif
+{
+    Q_OBJECT
+#ifdef Q_MOC_RUN
+public Q_SLOTS:
+    void slotFinished();
+#endif
+public:
+    explicit QGpgMEGpgCardJob();
+    ~QGpgMEGpgCardJob();
+
+    GpgME::Error start(const QStringList &cmds) Q_DECL_OVERRIDE;
+
+    GpgME::Error exec(const QStringList &cmds, QString &std_out, QString &std_err, int &exitCode) Q_DECL_OVERRIDE;
+};
+
+}
+#endif