Add FileType singleton

This singleton is used to get the mimetype info for files as well as supported formats for Images and AnimatedImages

src/CMakeLists.txt

@@ -17,6 +17,7 @@ add_executable(neochat
     sortfilterroomlistmodel.cpp
     chatdocumenthandler.cpp
     devicesmodel.cpp
+    filetypesingleton.cpp
     ../res.qrc
 )
 

src/filetypesingleton.cpp

@@ -0,0 +1,114 @@
+/* SPDX-FileCopyrightText: 2021 Noah Davis <noahadvs@gmail.com>
+ * SPDX-License-Identifier: LicenseRef-KDE-Accepted-LGPL
+ */
+
+#include "filetypesingleton.h"
+#include <QImageReader>
+#include <QMovie>
+
+static QStringList byteArrayListToStringList(const QByteArrayList &byteArrayList)
+{
+    QStringList stringList;
+    for(const QByteArray &byteArray : byteArrayList) {
+        stringList.append(QString::fromLocal8Bit(byteArray));
+    }
+    return stringList;
+}
+
+class FileTypeSingletonPrivate
+{
+    Q_DECLARE_PUBLIC(FileTypeSingleton)
+    Q_DISABLE_COPY(FileTypeSingletonPrivate)
+public:
+    FileTypeSingletonPrivate(FileTypeSingleton *qq);
+    FileTypeSingleton * const q_ptr;
+    QMimeDatabase mimetypeDatabase;
+    QStringList supportedImageFormats = byteArrayListToStringList(QImageReader::supportedImageFormats());
+    QStringList supportedAnimatedImageFormats = byteArrayListToStringList(QMovie::supportedFormats());
+};
+
+FileTypeSingletonPrivate::FileTypeSingletonPrivate(FileTypeSingleton* qq) : q_ptr(qq)
+{
+}
+
+FileTypeSingleton::FileTypeSingleton(QObject* parent)
+    : QObject(parent)
+    , d_ptr(new FileTypeSingletonPrivate(this))
+{
+}
+
+FileTypeSingleton::~FileTypeSingleton() noexcept
+{
+}
+
+QMimeType FileTypeSingleton::mimeTypeForName(const QString& nameOrAlias) const
+{
+    Q_D(const FileTypeSingleton);
+    return d->mimetypeDatabase.mimeTypeForName(nameOrAlias);
+}
+
+QMimeType FileTypeSingleton::mimeTypeForFile(const QString& fileName, MatchMode mode) const
+{
+    Q_D(const FileTypeSingleton);
+    return d->mimetypeDatabase.mimeTypeForFile(fileName, static_cast<QMimeDatabase::MatchMode>(mode));
+}
+
+QMimeType FileTypeSingleton::mimeTypeForFile(const QFileInfo& fileInfo, MatchMode mode) const
+{
+    Q_D(const FileTypeSingleton);
+    return d->mimetypeDatabase.mimeTypeForFile(fileInfo, static_cast<QMimeDatabase::MatchMode>(mode));
+}
+
+QList<QMimeType> FileTypeSingleton::mimeTypesForFileName(const QString& fileName) const
+{
+    Q_D(const FileTypeSingleton);
+    return d->mimetypeDatabase.mimeTypesForFileName(fileName);
+}
+
+QMimeType FileTypeSingleton::mimeTypeForData(const QByteArray& data) const
+{
+    Q_D(const FileTypeSingleton);
+    return d->mimetypeDatabase.mimeTypeForData(data);
+}
+
+QMimeType FileTypeSingleton::mimeTypeForData(QIODevice* device) const
+{
+    Q_D(const FileTypeSingleton);
+    return d->mimetypeDatabase.mimeTypeForData(device);
+}
+
+QMimeType FileTypeSingleton::mimeTypeForUrl(const QUrl& url) const
+{
+    Q_D(const FileTypeSingleton);
+    return d->mimetypeDatabase.mimeTypeForUrl(url);
+}
+
+QMimeType FileTypeSingleton::mimeTypeForFileNameAndData(const QString& fileName, QIODevice* device) const
+{
+    Q_D(const FileTypeSingleton);
+    return d->mimetypeDatabase.mimeTypeForFileNameAndData(fileName, device);
+}
+
+QMimeType FileTypeSingleton::mimeTypeForFileNameAndData(const QString& fileName, const QByteArray& data) const
+{
+    Q_D(const FileTypeSingleton);
+    return d->mimetypeDatabase.mimeTypeForFileNameAndData(fileName, data);
+}
+
+QString FileTypeSingleton::suffixForFileName(const QString& fileName) const
+{
+    Q_D(const FileTypeSingleton);
+    return d->mimetypeDatabase.suffixForFileName(fileName);
+}
+
+QStringList FileTypeSingleton::supportedImageFormats() const
+{
+    Q_D(const FileTypeSingleton);
+    return d->supportedImageFormats;
+}
+
+QStringList FileTypeSingleton::supportedAnimatedImageFormats() const
+{
+    Q_D(const FileTypeSingleton);
+    return d->supportedAnimatedImageFormats;
+}

src/filetypesingleton.h

@@ -0,0 +1,63 @@
+/* SPDX-FileCopyrightText: 2015 Klaralvdalens Datakonsult AB
+ * SPDX-FileCopyrightText: 2016 The Qt Company Ltd.
+ * SPDX-FileCopyrightText: 2021 Noah Davis <noahadvs@gmail.com>
+ * SPDX-License-Identifier: LicenseRef-KDE-Accepted-LGPL
+ */
+
+#ifndef FILETYPESINGLETON_H
+#define FILETYPESINGLETON_H
+
+#include <QObject>
+#include <qqml.h>
+#include <QMimeDatabase>
+
+class FileTypeSingletonPrivate;
+
+class FileTypeSingleton : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(QStringList supportedImageFormats READ supportedImageFormats CONSTANT FINAL)
+    Q_PROPERTY(QStringList supportedAnimatedImageFormats READ supportedAnimatedImageFormats CONSTANT FINAL)
+    QML_NAMED_ELEMENT(FileType)
+    QML_SINGLETON
+
+public:
+    explicit FileTypeSingleton(QObject *parent = nullptr);
+    ~FileTypeSingleton();
+
+    // Most of the code in this public section was copy/pasted from qmimedatabase.h
+    Q_INVOKABLE QMimeType mimeTypeForName(const QString &nameOrAlias) const;
+
+    enum MatchMode {
+        MatchDefault,
+        MatchExtension,
+        MatchContent
+    };
+    Q_ENUM(MatchMode)
+
+    Q_INVOKABLE QMimeType mimeTypeForFile(const QString &fileName, MatchMode mode = MatchDefault) const;
+    Q_INVOKABLE QMimeType mimeTypeForFile(const QFileInfo &fileInfo, MatchMode mode = MatchDefault) const;
+    Q_INVOKABLE QList<QMimeType> mimeTypesForFileName(const QString &fileName) const;
+
+    Q_INVOKABLE QMimeType mimeTypeForData(const QByteArray &data) const;
+    Q_INVOKABLE QMimeType mimeTypeForData(QIODevice *device) const;
+
+    Q_INVOKABLE QMimeType mimeTypeForUrl(const QUrl &url) const;
+    Q_INVOKABLE QMimeType mimeTypeForFileNameAndData(const QString &fileName, QIODevice *device) const;
+    Q_INVOKABLE QMimeType mimeTypeForFileNameAndData(const QString &fileName, const QByteArray &data) const;
+
+    Q_INVOKABLE QString suffixForFileName(const QString &fileName) const;
+
+    // These return a list of file extentions, not mimetypes
+    QStringList supportedImageFormats() const;
+    QStringList supportedAnimatedImageFormats() const;
+
+private:
+    const QScopedPointer<FileTypeSingletonPrivate> d_ptr;
+    Q_DECLARE_PRIVATE(FileTypeSingleton)
+    Q_DISABLE_COPY(FileTypeSingleton)
+};
+
+QML_DECLARE_TYPE(FileTypeSingleton)
+
+#endif // MIMETYPESINGLETON_H

src/main.cpp

@@ -31,6 +31,7 @@
 #include "csapi/leaving.h"
 #include "devicesmodel.h"
 #include "emojimodel.h"
+#include "filetypesingleton.h"
 #include "matriximageprovider.h"
 #include "messageeventmodel.h"
 #include "neochatconfig.h"
@@ -89,10 +90,12 @@ int main(int argc, char *argv[])
 
     Clipboard clipboard;
     auto config = NeoChatConfig::self();
+    FileTypeSingleton fileTypeSingleton;
 
     qmlRegisterSingletonInstance("org.kde.neochat", 1, 0, "Controller", &Controller::instance());
     qmlRegisterSingletonInstance("org.kde.neochat", 1, 0, "Clipboard", &clipboard);
     qmlRegisterSingletonInstance("org.kde.neochat", 1, 0, "Config", config);
+    qmlRegisterSingletonInstance("org.kde.neochat", 1, 0, "FileType", &fileTypeSingleton);
     qmlRegisterType<AccountListModel>("org.kde.neochat", 1, 0, "AccountListModel");
     qmlRegisterType<ChatDocumentHandler>("org.kde.neochat", 1, 0, "ChatDocumentHandler");
     qmlRegisterType<RoomListModel>("org.kde.neochat", 1, 0, "RoomListModel");
@@ -116,6 +119,7 @@ int main(int argc, char *argv[])
     qRegisterMetaType<NeoChatRoom *>("NeoChatRoom*");
     qRegisterMetaType<NeoChatUser *>("NeoChatUser*");
     qRegisterMetaType<GetRoomEventsJob *>("GetRoomEventsJob*");
+    qRegisterMetaType<QMimeType>("QMimeType");
 
     qRegisterMetaTypeStreamOperators<Emoji>();