4 files changed, 204 insertions, 0 deletions
diff --git a/api/logic/minecraft/curse/FileResolvingTask.cpp b/api/logic/minecraft/curse/FileResolvingTask.cpp
new file mode 100644
index 00000000..13308202
--- /dev/null
+++ b/api/logic/minecraft/curse/FileResolvingTask.cpp
@@ -0,0 +1,64 @@
+#include "FileResolvingTask.h"
+#include "Json.h"
+
+const char * metabase = "https://cursemeta.dries007.net";
+
+Curse::FileResolvingTask::FileResolvingTask(QVector<Curse::File>& toProcess)
+	: m_toProcess(toProcess)
+{
+}
+
+void Curse::FileResolvingTask::executeTask()
+{
+	m_dljob.reset(new NetJob("Curse file resolver"));
+	results.resize(m_toProcess.size());
+	int index = 0;
+	for(auto & file: m_toProcess)
+	{
+		auto projectIdStr = QString::number(file.projectId);
+		auto fileIdStr = QString::number(file.fileId);
+		QString metaurl = QString("%1/%2/%3.json").arg(metabase, projectIdStr, fileIdStr);
+		auto dl = Net::Download::makeByteArray(QUrl(metaurl), &results[index]);
+		m_dljob->addNetAction(dl);
+		index ++;
+	}
+	connect(m_dljob.get(), &NetJob::finished, this, &Curse::FileResolvingTask::netJobFinished);
+	m_dljob->start();
+}
+
+void Curse::FileResolvingTask::netJobFinished()
+{
+	bool failed = false;
+	int index = 0;
+	for(auto & bytes: results)
+	{
+		try
+		{
+			auto doc = Json::requireDocument(bytes);
+			auto obj = Json::requireObject(doc);
+			// result code signifies true failure.
+			if(obj.contains("code"))
+			{
+				failed = true;
+				continue;
+			}
+			auto & out = m_toProcess[index];
+			out.fileName = Json::requireString(obj, "FileNameOnDisk");
+			out.url = Json::requireString(obj, "DownloadURL");
+			out.resolved = true;
+		}
+		catch(JSONValidationError & e)
+		{
+			failed = true;
+		}
+		index++;
+	}
+	if(!failed)
+	{
+		emitSucceeded();
+	}
+	else
+	{
+		emitFailed(tr("Some curse ID resolving tasks failed."));
+	}
+}
diff --git a/api/logic/minecraft/curse/FileResolvingTask.h b/api/logic/minecraft/curse/FileResolvingTask.h
new file mode 100644
index 00000000..b7ca85d3
--- /dev/null
+++ b/api/logic/minecraft/curse/FileResolvingTask.h
@@ -0,0 +1,32 @@
+#pragma once
+
+#include "tasks/Task.h"
+#include "net/NetJob.h"
+#include "PackManifest.h"
+
+#include "multimc_logic_export.h"
+
+namespace Curse
+{
+class MULTIMC_LOGIC_EXPORT FileResolvingTask : public Task
+{
+	Q_OBJECT
+public:
+	explicit FileResolvingTask(QVector<Curse::File> &toProcess);
+	const QVector<Curse::File> &getResults() const
+	{
+		return m_toProcess;
+	}
+
+protected:
+	virtual void executeTask() override;
+
+protected slots:
+	void netJobFinished();
+
+private: /* data */
+	QVector<Curse::File> m_toProcess;
+	QVector<QByteArray> results;
+	NetJobPtr m_dljob;
+};
+}
diff --git a/api/logic/minecraft/curse/PackManifest.cpp b/api/logic/minecraft/curse/PackManifest.cpp
new file mode 100644
index 00000000..a4ea703b
--- /dev/null
+++ b/api/logic/minecraft/curse/PackManifest.cpp
@@ -0,0 +1,63 @@
+#include "PackManifest.h"
+#include "Json.h"
+
+static void loadFileV1(Curse::File & f, QJsonObject & file)
+{
+	f.projectId = Json::requireInteger(file, "projectID");
+	f.fileId = Json::requireInteger(file, "fileID");
+	f.required = Json::requireBoolean(file, "required");
+}
+
+static void loadModloaderV1(Curse::Modloader & m, QJsonObject & modLoader)
+{
+	m.id = Json::requireString(modLoader, "id");
+	m.primary = Json::ensureBoolean(modLoader, "primary", false);
+}
+
+static void loadMinecraftV1(Curse::Minecraft & m, QJsonObject & minecraft)
+{
+	m.version = Json::requireString(minecraft, "version");
+	auto arr = Json::ensureArray(minecraft, "modLoaders", QJsonArray());
+	for (const auto & item : arr)
+	{
+		auto obj = Json::requireObject(item);
+		Curse::Modloader loader;
+		loadModloaderV1(loader, obj);
+		m.modLoaders.append(loader);
+	}
+}
+
+static void loadManifestV1(Curse::Manifest & m, QJsonObject & manifest)
+{
+	auto mc = Json::requireObject(manifest, "minecraft");
+	loadMinecraftV1(m.minecraft, mc);
+	m.name = Json::requireString(manifest, "name");
+	m.version = Json::requireString(manifest, "version");
+	m.author = Json::requireString(manifest, "author");
+	auto arr = Json::ensureArray(manifest, "files", QJsonArray());
+	for (const auto & item : arr)
+	{
+		auto obj = Json::requireObject(item);
+		Curse::File file;
+		loadFileV1(file, obj);
+		m.files.append(file);
+	}
+	m.overrides = Json::ensureString(manifest, "overrides", "overrides");
+}
+
+void Curse::loadManifest(Curse::Manifest & m, const QString &filepath)
+{
+	auto doc = Json::requireDocument(filepath);
+	auto obj = Json::requireObject(doc);
+	m.manifestType = Json::requireString(obj, "manifestType");
+	if(m.manifestType != "minecraftModpack")
+	{
+		throw JSONValidationError("Not a Curse modpack manifest!");
+	}
+	m.manifestVersion = Json::requireInteger(obj, "manifestVersion");
+	if(m.manifestVersion != 1)
+	{
+		throw JSONValidationError(QString("Unknown manifest version (%1)").arg(m.manifestVersion));
+	}
+	loadManifestV1(m, obj);
+}
diff --git a/api/logic/minecraft/curse/PackManifest.h b/api/logic/minecraft/curse/PackManifest.h
new file mode 100644
index 00000000..8b9602a4
--- /dev/null
+++ b/api/logic/minecraft/curse/PackManifest.h
@@ -0,0 +1,45 @@
+#pragma once
+
+#include <QString>
+#include <QVector>
+
+namespace Curse
+{
+struct File
+{
+	int projectId = 0;
+	int fileId = 0;
+	bool required = true;
+
+	// our
+	bool resolved = false;
+	QString fileName;
+	QString url;
+};
+
+struct Modloader
+{
+	QString id;
+	bool primary = false;
+};
+
+struct Minecraft
+{
+	QString version;
+	QVector<Curse::Modloader> modLoaders;
+};
+
+struct Manifest
+{
+	QString manifestType;
+	int manifestVersion = 0;
+	Curse::Minecraft minecraft;
+	QString name;
+	QString version;
+	QString author;
+	QVector<Curse::File> files;
+	QString overrides;
+};
+
+void loadManifest(Curse::Manifest & m, const QString &filepath);
+}