GUI, BACKENDS: Add DLC Downloader

backends/dlc/dlcdesc.h

@@ -0,0 +1,57 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef BACKENDS_DLC_DLCDESC_H
+#define BACKENDS_DLC_DLCDESC_H
+
+#include "common/str.h"
+
+namespace DLC {
+
+struct DLCDesc {
+
+public:
+	enum State {
+		kAvailable,
+		kInProgress,
+		kDownloaded,
+		kCancelled,
+		kErrorDownloading
+	};
+	Common::String name;
+	Common::String id;
+	Common::String url;
+	Common::String platform;
+	Common::String gameid;
+	Common::String description;
+	Common::String language;
+	Common::String extra;
+	Common::String engineid;
+	Common::String guioptions;
+	uint32 size = 0;
+	uint32 idx = 0;
+	State state = State::kAvailable;
+};
+
+
+} // End of namespace DLC
+
+#endif

backends/dlc/dlcmanager.cpp

@@ -0,0 +1,131 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "common/system.h"
+
+#include "backends/dlc/dlcmanager.h"
+#include "backends/dlc/dlcdesc.h"
+#include "backends/dlc/scummvmcloud.h"
+
+#include "gui/dlcsdialog.h"
+#include "gui/launcher.h"
+
+namespace Common {
+
+DECLARE_SINGLETON(DLC::DLCManager);
+
+}
+
+namespace DLC {
+
+DLCManager::DLCManager() : CommandSender(nullptr) {
+	_store = g_system->getDLCStore();
+}
+
+DLCManager::~DLCManager() {
+	for (uint32 i = 0; i < _dlcs.size(); ++i) {
+		delete _dlcs[i];
+	}
+}
+
+void DLCManager::init() {}
+
+void DLCManager::getAllDLCs() {
+	_store->getAllDLCs();
+}
+
+void DLCManager::refreshDLCList() {
+	sendCommand(GUI::kRefreshDLCList, 0);
+}
+
+void DLCManager::refreshLauncherGameList() {
+	if (_launcher) {
+		_launcher->rebuild();
+	}
+}
+
+void DLCManager::setLauncher(GUI::LauncherDialog *launcher) {
+	_launcher = launcher;
+}
+
+void DLCManager::addDownload(uint32 idx) {
+	if (_dlcs[idx]->state == DLCDesc::kInProgress) {
+		// if DLC is already in queue, don't add again
+		return;
+	}
+	_dlcs[idx]->state = DLCDesc::kInProgress;
+	_queuedDownloadTasks.push(_dlcs[idx]);
+	_dlcsInProgress.push_back(_dlcs[idx]);
+	if (!_isDLCDownloading) {
+		// if queue is not already processing
+		DLCManager::processDownloadQueue();
+	}
+}
+
+void DLCManager::processDownloadQueue() {
+	_currentDownloadedSize = 0;
+	_isDLCDownloading = true;
+	if (!_queuedDownloadTasks.empty()) {
+		if (_queuedDownloadTasks.front()->state == DLCDesc::kInProgress) {
+			_currentDownloadingDLC = _queuedDownloadTasks.front()->id;
+			DLCManager::startDownloadAsync(_queuedDownloadTasks.front()->id, _queuedDownloadTasks.front()->url);
+		} else {
+			// state is already cancelled/downloaded -> skip download
+			_queuedDownloadTasks.pop();
+			_dlcsInProgress.remove_at(0);
+			// process next download in the queue
+			processDownloadQueue();
+		}
+	} else {
+		// no more download in queue
+		_isDLCDownloading = false;
+		_currentDownloadingDLC = "";
+	}
+}
+
+void DLCManager::startDownloadAsync(const Common::String &id, const Common::String &url) {
+	_store->startDownloadAsync(id, url);
+}
+
+bool DLCManager::cancelDownload(uint32 idx) {
+	if (_queuedDownloadTasks.front()->idx == idx) {
+		// if already downloading, interrupt startDownloadAsync
+		_interruptCurrentDownload = true;
+	} else {
+		// if not started, skip it in processDownload()
+		_dlcs[idx]->state = DLCDesc::kCancelled;
+		DLCMan.refreshDLCList();
+	}
+	return true;
+}
+
+Common::String DLCManager::getCurrentDownloadingDLC() const {
+	return _currentDownloadingDLC;
+}
+
+int DLCManager::getDLCIdxFromId(const Common::String &id) const {
+	for (uint32 i = 0; i < _dlcs.size(); ++i) {
+		if (_dlcs[i]->id == id) return i;
+	}
+	return -1;
+}
+
+} // End of namespace DLC

backends/dlc/dlcmanager.h

@@ -0,0 +1,95 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef BACKENDS_DLC_DLCMANAGER_H
+#define BACKENDS_DLC_DLCMANAGER_H
+
+#include "common/str.h"
+#include "common/str-array.h"
+#include "common/queue.h"
+#include "common/singleton.h"
+
+#include "gui/object.h"
+
+#include "backends/networking/curl/request.h"
+
+namespace GUI {
+class LauncherDialog;
+}
+
+namespace DLC {
+class Store;
+struct DLCDesc;
+}
+
+namespace DLC {
+
+class DLCManager : public Common::Singleton<DLCManager>, public GUI::CommandSender {
+
+	Store *_store;
+	GUI::LauncherDialog *_launcher;
+
+	bool _isDLCDownloading = false;
+	Common::String _currentDownloadingDLC;
+
+public:
+	bool _fetchDLCs = false;
+	bool _interruptCurrentDownload = false;
+	uint32 _currentDownloadedSize;
+	Common::String _errorText;
+	Common::Array<DLCDesc*> _dlcs;
+	Common::Array<DLCDesc*> _dlcsInProgress;
+	Common::Queue<DLCDesc*> _queuedDownloadTasks;
+
+	DLCManager();
+	virtual ~DLCManager();
+
+	void init();
+
+	// Runs only once
+	void getAllDLCs();
+
+	void refreshDLCList();
+
+	void refreshLauncherGameList();
+
+	void setLauncher(GUI::LauncherDialog *launcher);
+
+	// Add download task to queue, runs on click download button, 
+	void addDownload(uint32 idx);
+
+	bool cancelDownload(uint32 idx);
+
+	void processDownloadQueue();
+
+	Common::String getCurrentDownloadingDLC() const;
+
+	int getDLCIdxFromId(const Common::String &id) const;
+
+	void startDownloadAsync(const Common::String &id, const Common::String &url);
+};
+
+#define DLCMan        DLC::DLCManager::instance()
+
+} // End of namespace DLC
+
+
+#endif