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Diffstat (limited to 'lib/events/eventcontent.h')
| -rw-r--r-- | lib/events/eventcontent.h | 506 |
1 files changed, 239 insertions, 267 deletions
diff --git a/lib/events/eventcontent.h b/lib/events/eventcontent.h index 0d4c047e..af26c0a4 100644 --- a/lib/events/eventcontent.h +++ b/lib/events/eventcontent.h @@ -1,282 +1,254 @@ -/****************************************************************************** - * Copyright (C) 2017 Kitsune Ral <kitsune-ral@users.sf.net> - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 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 - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ +// SPDX-FileCopyrightText: 2017 Kitsune Ral <kitsune-ral@users.sf.net> +// SPDX-License-Identifier: LGPL-2.1-or-later #pragma once // This file contains generic event content definitions, applicable to room // message events as well as other events (e.g., avatars). +#include "filesourceinfo.h" +#include "quotient_export.h" + #include <QtCore/QJsonObject> +#include <QtCore/QMetaType> #include <QtCore/QMimeType> #include <QtCore/QSize> #include <QtCore/QUrl> -#include <QtCore/QMetaType> -namespace Quotient { -namespace EventContent { - /** - * A base class for all content types that can be stored - * in a RoomMessageEvent - * - * Each content type class should have a constructor taking - * a QJsonObject and override fillJson() with an implementation - * that will fill the target QJsonObject with stored values. It is - * assumed but not required that a content object can also be created - * from plain data. - */ - class Base { - public: - explicit Base(QJsonObject o = {}) : originalJson(std::move(o)) {} - virtual ~Base() = default; - - // FIXME: make toJson() from converters.* work on base classes - QJsonObject toJson() const; - - public: - QJsonObject originalJson; - - protected: - Base(const Base&) = default; - Base(Base&&) = default; - - virtual void fillJson(QJsonObject* o) const = 0; - }; - - // The below structures fairly follow CS spec 11.2.1.6. The overall - // set of attributes for each content types is a superset of the spec - // but specific aggregation structure is altered. See doc comments to - // each type for the list of available attributes. - - // A quick classes inheritance structure follows: - // FileInfo - // FileContent : UrlBasedContent<FileInfo, Thumbnail> - // AudioContent : UrlBasedContent<FileInfo, Duration> - // ImageInfo : FileInfo + imageSize attribute - // ImageContent : UrlBasedContent<ImageInfo, Thumbnail> - // VideoContent : UrlBasedContent<ImageInfo, Thumbnail, Duration> - - /** - * A base/mixin class for structures representing an "info" object for - * some content types. These include most attachment types currently in - * the CS API spec. - * - * In order to use it in a content class, derive both from TypedBase - * (or Base) and from FileInfo (or its derivative, such as \p ImageInfo) - * and call fillInfoJson() to fill the "info" subobject. Make sure - * to pass an "info" part of JSON to FileInfo constructor, not the whole - * JSON content, as well as contents of "url" (or a similar key) and - * optionally "filename" node from the main JSON content. Assuming you - * don't do unusual things, you should use \p UrlBasedContent<> instead - * of doing multiple inheritance and overriding Base::fillJson() by hand. - * - * This class is not polymorphic. - */ - class FileInfo { - public: - explicit FileInfo(const QUrl& u, qint64 payloadSize = -1, - const QMimeType& mimeType = {}, - const QString& originalFilename = {}); - FileInfo(const QUrl& u, const QJsonObject& infoJson, - const QString& originalFilename = {}); - - bool isValid() const; - - void fillInfoJson(QJsonObject* infoJson) const; - - /** - * \brief Extract media id from the URL - * - * This can be used, e.g., to construct a QML-facing image:// - * URI as follows: - * \code "image://provider/" + info.mediaId() \endcode - */ - QString mediaId() const { return url.authority() + url.path(); } - - public: - QJsonObject originalInfoJson; - QMimeType mimeType; - QUrl url; - qint64 payloadSize; - QString originalName; - }; - - template <typename InfoT> - QJsonObject toInfoJson(const InfoT& info) +class QFileInfo; + +namespace Quotient::EventContent { +//! \brief Base for all content types that can be stored in RoomMessageEvent +//! +//! Each content type class should have a constructor taking +//! a QJsonObject and override fillJson() with an implementation +//! that will fill the target QJsonObject with stored values. It is +//! assumed but not required that a content object can also be created +//! from plain data. +class QUOTIENT_API Base { +public: + explicit Base(QJsonObject o = {}) : originalJson(std::move(o)) {} + virtual ~Base() = default; + + QJsonObject toJson() const; + +public: + QJsonObject originalJson; + + // You can't assign those classes + Base& operator=(const Base&) = delete; + Base& operator=(Base&&) = delete; + +protected: + Base(const Base&) = default; + Base(Base&&) noexcept = default; + + virtual void fillJson(QJsonObject&) const = 0; +}; + +// The below structures fairly follow CS spec 11.2.1.6. The overall +// set of attributes for each content types is a superset of the spec +// but specific aggregation structure is altered. See doc comments to +// each type for the list of available attributes. + +// A quick classes inheritance structure follows (the definitions are +// spread across eventcontent.h and roommessageevent.h): +// UrlBasedContent<InfoT> : InfoT + thumbnail data +// PlayableContent<InfoT> : + duration attribute +// FileInfo +// FileContent = UrlBasedContent<FileInfo> +// AudioContent = PlayableContent<FileInfo> +// ImageInfo : FileInfo + imageSize attribute +// ImageContent = UrlBasedContent<ImageInfo> +// VideoContent = PlayableContent<ImageInfo> + +//! \brief Mix-in class representing `info` subobject in content JSON +//! +//! This is one of base classes for content types that deal with files or +//! URLs. It stores the file metadata attributes, such as size, MIME type +//! etc. found in the `content/info` subobject of event JSON payloads. +//! Actual content classes derive from this class _and_ TypedBase that +//! provides a polymorphic interface to access data in the mix-in. FileInfo +//! (as well as ImageInfo, that adds image size to the metadata) is NOT +//! polymorphic and is used in a non-polymorphic way to store thumbnail +//! metadata (in a separate instance), next to the metadata on the file +//! itself. +//! +//! If you need to make a new _content_ (not info) class based on files/URLs +//! take UrlBasedContent as the example, i.e.: +//! 1. Double-inherit from this class (or ImageInfo) and TypedBase. +//! 2. Provide a constructor from QJsonObject that will pass the `info` +//! subobject (not the whole content JSON) down to FileInfo/ImageInfo. +//! 3. Override fillJson() to customise the JSON export logic. Make sure +//! to call toInfoJson() from it to produce the payload for the `info` +//! subobject in the JSON payload. +//! +//! \sa ImageInfo, FileContent, ImageContent, AudioContent, VideoContent, +//! UrlBasedContent +class QUOTIENT_API FileInfo { +public: + FileInfo() = default; + //! \brief Construct from a QFileInfo object + //! + //! \param fi a QFileInfo object referring to an existing file + explicit FileInfo(const QFileInfo& fi); + explicit FileInfo(FileSourceInfo sourceInfo, qint64 payloadSize = -1, + const QMimeType& mimeType = {}, + QString originalFilename = {}); + //! \brief Construct from a JSON `info` payload + //! + //! Make sure to pass the `info` subobject of content JSON, not the + //! whole JSON content. + FileInfo(FileSourceInfo sourceInfo, const QJsonObject& infoJson, + QString originalFilename = {}); + + bool isValid() const; + QUrl url() const; + + //! \brief Extract media id from the URL + //! + //! This can be used, e.g., to construct a QML-facing image:// + //! URI as follows: + //! \code "image://provider/" + info.mediaId() \endcode + QString mediaId() const { return url().authority() + url().path(); } + +public: + FileSourceInfo source; + QJsonObject originalInfoJson; + QMimeType mimeType; + qint64 payloadSize = 0; + QString originalName; +}; + +QUOTIENT_API QJsonObject toInfoJson(const FileInfo& info); + +//! \brief A content info class for image/video content types and thumbnails +class QUOTIENT_API ImageInfo : public FileInfo { +public: + ImageInfo() = default; + explicit ImageInfo(const QFileInfo& fi, QSize imageSize = {}); + explicit ImageInfo(FileSourceInfo sourceInfo, qint64 fileSize = -1, + const QMimeType& type = {}, QSize imageSize = {}, + const QString& originalFilename = {}); + ImageInfo(FileSourceInfo sourceInfo, const QJsonObject& infoJson, + const QString& originalFilename = {}); + +public: + QSize imageSize; +}; + +QUOTIENT_API QJsonObject toInfoJson(const ImageInfo& info); + +//! \brief An auxiliary class for an info type that carries a thumbnail +//! +//! This class saves/loads a thumbnail to/from `info` subobject of +//! the JSON representation of event content; namely, `info/thumbnail_url` +//! (or, in case of an encrypted thumbnail, `info/thumbnail_file`) and +//! `info/thumbnail_info` fields are used. +class QUOTIENT_API Thumbnail : public ImageInfo { +public: + using ImageInfo::ImageInfo; + explicit Thumbnail(const QJsonObject& infoJson, + const Omittable<EncryptedFileMetadata>& efm = none); + + //! \brief Add thumbnail information to the passed `info` JSON object + void dumpTo(QJsonObject& infoJson) const; +}; + +class QUOTIENT_API TypedBase : public Base { +public: + virtual QMimeType type() const = 0; + virtual const FileInfo* fileInfo() const { return nullptr; } + virtual FileInfo* fileInfo() { return nullptr; } + virtual const Thumbnail* thumbnailInfo() const { return nullptr; } + +protected: + explicit TypedBase(QJsonObject o = {}) : Base(std::move(o)) {} + using Base::Base; +}; + +//! \brief A template class for content types with a URL and additional info +//! +//! Types that derive from this class template take `url` (or, if the file +//! is encrypted, `file`) and, optionally, `filename` values from +//! the top-level JSON object and the rest of information from the `info` +//! subobject, as defined by the parameter type. +//! \tparam InfoT base info class - FileInfo or ImageInfo +template <class InfoT> +class UrlBasedContent : public TypedBase, public InfoT { +public: + using InfoT::InfoT; + explicit UrlBasedContent(const QJsonObject& json) + : TypedBase(json) + , InfoT(QUrl(json["url"].toString()), json["info"].toObject(), + json["filename"].toString()) + , thumbnail(FileInfo::originalInfoJson) { - QJsonObject infoJson; - info.fillInfoJson(&infoJson); - return infoJson; + if (const auto efmJson = json.value("file"_ls).toObject(); + !efmJson.isEmpty()) + InfoT::source = fromJson<EncryptedFileMetadata>(efmJson); + // Two small hacks on originalJson to expose mediaIds to QML + originalJson.insert("mediaId", InfoT::mediaId()); + originalJson.insert("thumbnailMediaId", thumbnail.mediaId()); } - /** - * A content info class for image content types: image, thumbnail, video - */ - class ImageInfo : public FileInfo { - public: - explicit ImageInfo(const QUrl& u, qint64 fileSize = -1, - QMimeType mimeType = {}, const QSize& imageSize = {}, - const QString& originalFilename = {}); - ImageInfo(const QUrl& u, const QJsonObject& infoJson, - const QString& originalFilename = {}); - - void fillInfoJson(QJsonObject* infoJson) const; - - public: - QSize imageSize; - }; - - /** - * An auxiliary class for an info type that carries a thumbnail - * - * This class saves/loads a thumbnail to/from "info" subobject of - * the JSON representation of event content; namely, - * "info/thumbnail_url" and "info/thumbnail_info" fields are used. - */ - class Thumbnail : public ImageInfo { - public: - Thumbnail() : ImageInfo(QUrl()) {} // To allow empty thumbnails - Thumbnail(const QJsonObject& infoJson); - Thumbnail(const ImageInfo& info) : ImageInfo(info) {} - using ImageInfo::ImageInfo; - - /** - * Writes thumbnail information to "thumbnail_info" subobject - * and thumbnail URL to "thumbnail_url" node inside "info". - */ - void fillInfoJson(QJsonObject* infoJson) const; - }; - - class TypedBase : public Base { - public: - explicit TypedBase(QJsonObject o = {}) : Base(std::move(o)) {} - virtual QMimeType type() const = 0; - virtual const FileInfo* fileInfo() const { return nullptr; } - virtual FileInfo* fileInfo() { return nullptr; } - virtual const Thumbnail* thumbnailInfo() const { return nullptr; } - - protected: - using Base::Base; - }; - - /** - * A base class for content types that have a URL and additional info - * - * Types that derive from this class template take "url" and, - * optionally, "filename" values from the top-level JSON object and - * the rest of information from the "info" subobject, as defined by - * the parameter type. - * - * \tparam InfoT base info class - */ - template <class InfoT> - class UrlBasedContent : public TypedBase, public InfoT { - public: - using InfoT::InfoT; - explicit UrlBasedContent(const QJsonObject& json) - : TypedBase(json) - , InfoT(json["url"].toString(), json["info"].toObject(), - json["filename"].toString()) - { - // A small hack to facilitate links creation in QML. - originalJson.insert("mediaId", InfoT::mediaId()); - } - - QMimeType type() const override { return InfoT::mimeType; } - const FileInfo* fileInfo() const override { return this; } - FileInfo* fileInfo() override { return this; } - - protected: - void fillJson(QJsonObject* json) const override - { - Q_ASSERT(json); - json->insert("url", InfoT::url.toString()); - if (!InfoT::originalName.isEmpty()) - json->insert("filename", InfoT::originalName); - json->insert("info", toInfoJson<InfoT>(*this)); - } - }; - - template <typename InfoT> - class UrlWithThumbnailContent : public UrlBasedContent<InfoT> { - public: - // NB: when using inherited constructors, thumbnail has to be - // initialised separately - using UrlBasedContent<InfoT>::UrlBasedContent; - explicit UrlWithThumbnailContent(const QJsonObject& json) - : UrlBasedContent<InfoT>(json), thumbnail(InfoT::originalInfoJson) - { - // Another small hack, to simplify making a thumbnail link - UrlBasedContent<InfoT>::originalJson.insert("thumbnailMediaId", - thumbnail.mediaId()); - } - - const Thumbnail* thumbnailInfo() const override { return &thumbnail; } - - public: - Thumbnail thumbnail; - - protected: - void fillJson(QJsonObject* json) const override - { - UrlBasedContent<InfoT>::fillJson(json); - auto infoJson = json->take("info").toObject(); - thumbnail.fillInfoJson(&infoJson); - json->insert("info", infoJson); - } - }; - - /** - * Content class for m.image - * - * Available fields: - * - corresponding to the top-level JSON: - * - url - * - filename (extension to the spec) - * - corresponding to the "info" subobject: - * - payloadSize ("size" in JSON) - * - mimeType ("mimetype" in JSON) - * - imageSize (QSize for a combination of "h" and "w" in JSON) - * - thumbnail.url ("thumbnail_url" in JSON) - * - corresponding to the "info/thumbnail_info" subobject: contents of - * thumbnail field, in the same vein as for the main image: - * - payloadSize - * - mimeType - * - imageSize - */ - using ImageContent = UrlWithThumbnailContent<ImageInfo>; - - /** - * Content class for m.file - * - * Available fields: - * - corresponding to the top-level JSON: - * - url - * - filename - * - corresponding to the "info" subobject: - * - payloadSize ("size" in JSON) - * - mimeType ("mimetype" in JSON) - * - thumbnail.url ("thumbnail_url" in JSON) - * - corresponding to the "info/thumbnail_info" subobject: - * - thumbnail.payloadSize - * - thumbnail.mimeType - * - thumbnail.imageSize (QSize for "h" and "w" in JSON) - */ - using FileContent = UrlWithThumbnailContent<FileInfo>; -} // namespace EventContent -} // namespace Quotient + QMimeType type() const override { return InfoT::mimeType; } + const FileInfo* fileInfo() const override { return this; } + FileInfo* fileInfo() override { return this; } + const Thumbnail* thumbnailInfo() const override { return &thumbnail; } + +public: + Thumbnail thumbnail; + +protected: + virtual void fillInfoJson(QJsonObject& infoJson [[maybe_unused]]) const + {} + + void fillJson(QJsonObject& json) const override + { + Quotient::fillJson(json, { "url"_ls, "file"_ls }, InfoT::source); + if (!InfoT::originalName.isEmpty()) + json.insert("filename", InfoT::originalName); + auto infoJson = toInfoJson(*this); + if (thumbnail.isValid()) + thumbnail.dumpTo(infoJson); + fillInfoJson(infoJson); + json.insert("info", infoJson); + } +}; + +//! \brief Content class for m.image +//! +//! Available fields: +//! - corresponding to the top-level JSON: +//! - source (corresponding to `url` or `file` in JSON) +//! - filename (extension to the spec) +//! - corresponding to the `info` subobject: +//! - payloadSize (`size` in JSON) +//! - mimeType (`mimetype` in JSON) +//! - imageSize (QSize for a combination of `h` and `w` in JSON) +//! - thumbnail.url (`thumbnail_url` in JSON) +//! - corresponding to the `info/thumbnail_info` subobject: contents of +//! thumbnail field, in the same vein as for the main image: +//! - payloadSize +//! - mimeType +//! - imageSize +using ImageContent = UrlBasedContent<ImageInfo>; + +//! \brief Content class for m.file +//! +//! Available fields: +//! - corresponding to the top-level JSON: +//! - source (corresponding to `url` or `file` in JSON) +//! - filename +//! - corresponding to the `info` subobject: +//! - payloadSize (`size` in JSON) +//! - mimeType (`mimetype` in JSON) +//! - thumbnail.source (`thumbnail_url` or `thumbnail_file` in JSON) +//! - corresponding to the `info/thumbnail_info` subobject: +//! - thumbnail.payloadSize +//! - thumbnail.mimeType +//! - thumbnail.imageSize (QSize for `h` and `w` in JSON) +using FileContent = UrlBasedContent<FileInfo>; +} // namespace Quotient::EventContent Q_DECLARE_METATYPE(const Quotient::EventContent::TypedBase*) |