1 files changed, 173 insertions, 0 deletions
diff --git a/launcher/InstanceList.h b/launcher/InstanceList.h
new file mode 100644
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--- /dev/null
+++ b/launcher/InstanceList.h
@@ -0,0 +1,173 @@
+/* Copyright 2013-2021 MultiMC Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <QObject>
+#include <QAbstractListModel>
+#include <QSet>
+#include <QList>
+
+#include "BaseInstance.h"
+
+#include "QObjectPtr.h"
+
+class QFileSystemWatcher;
+class InstanceTask;
+using InstanceId = QString;
+using GroupId = QString;
+using InstanceLocator = std::pair<InstancePtr, int>;
+
+enum class InstCreateError
+{
+    NoCreateError = 0,
+    NoSuchVersion,
+    UnknownCreateError,
+    InstExists,
+    CantCreateDir
+};
+
+enum class GroupsState
+{
+    NotLoaded,
+    Steady,
+    Dirty
+};
+
+
+class InstanceList : public QAbstractListModel
+{
+    Q_OBJECT
+
+public:
+    explicit InstanceList(SettingsObjectPtr settings, const QString & instDir, QObject *parent = 0);
+    virtual ~InstanceList();
+
+public:
+    QModelIndex index(int row, int column = 0, const QModelIndex &parent = QModelIndex()) const override;
+    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+    QVariant data(const QModelIndex &index, int role) const override;
+    Qt::ItemFlags flags(const QModelIndex &index) const override;
+
+    bool setData(const QModelIndex & index, const QVariant & value, int role) override;
+
+    enum AdditionalRoles
+    {
+        GroupRole = Qt::UserRole,
+        InstancePointerRole = 0x34B1CB48, ///< Return pointer to real instance
+        InstanceIDRole = 0x34B1CB49 ///< Return id if the instance
+    };
+    /*!
+     * \brief Error codes returned by functions in the InstanceList class.
+     * NoError Indicates that no error occurred.
+     * UnknownError indicates that an unspecified error occurred.
+     */
+    enum InstListError
+    {
+        NoError = 0,
+        UnknownError
+    };
+
+    InstancePtr at(int i) const
+    {
+        return m_instances.at(i);
+    }
+
+    int count() const
+    {
+        return m_instances.count();
+    }
+
+    InstListError loadList();
+    void saveNow();
+
+
+    InstancePtr getInstanceById(QString id) const;
+    QModelIndex getInstanceIndexById(const QString &id) const;
+    QStringList getGroups();
+    bool isGroupCollapsed(const QString &groupName);
+
+    GroupId getInstanceGroup(const InstanceId & id) const;
+    void setInstanceGroup(const InstanceId & id, const GroupId& name);
+
+    void deleteGroup(const GroupId & name);
+    void deleteInstance(const InstanceId & id);
+
+    // Wrap an instance creation task in some more task machinery and make it ready to be used
+    Task * wrapInstanceTask(InstanceTask * task);
+
+    /**
+     * Create a new empty staging area for instance creation and @return a path/key top commit it later.
+     * Used by instance manipulation tasks.
+     */
+    QString getStagedInstancePath();
+
+    /**
+     * Commit the staging area given by @keyPath to the provider - used when creation succeeds.
+     * Used by instance manipulation tasks.
+     */
+    bool commitStagedInstance(const QString & keyPath, const QString& instanceName, const QString & groupName);
+
+    /**
+     * Destroy a previously created staging area given by @keyPath - used when creation fails.
+     * Used by instance manipulation tasks.
+     */
+    bool destroyStagingPath(const QString & keyPath);
+
+    int getTotalPlayTime();
+
+signals:
+    void dataIsInvalid();
+    void instancesChanged();
+    void instanceSelectRequest(QString instanceId);
+    void groupsChanged(QSet<QString> groups);
+
+public slots:
+    void on_InstFolderChanged(const Setting &setting, QVariant value);
+    void on_GroupStateChanged(const QString &group, bool collapsed);
+
+private slots:
+    void propertiesChanged(BaseInstance *inst);
+    void providerUpdated();
+    void instanceDirContentsChanged(const QString &path);
+
+private:
+    int getInstIndex(BaseInstance *inst) const;
+    void updateTotalPlayTime();
+    void suspendWatch();
+    void resumeWatch();
+    void add(const QList<InstancePtr> &list);
+    void loadGroupList();
+    void saveGroupList();
+    QList<InstanceId> discoverInstances();
+    InstancePtr loadInstance(const InstanceId& id);
+
+private:
+    int m_watchLevel = 0;
+    int totalPlayTime = 0;
+    bool m_dirty = false;
+    QList<InstancePtr> m_instances;
+    QSet<QString> m_groupNameCache;
+
+    SettingsObjectPtr m_globalSettings;
+    QString m_instDir;
+    QFileSystemWatcher * m_watcher;
+    // FIXME: this is so inefficient that looking at it is almost painful.
+    QSet<QString> m_collapsedGroups;
+    QMap<InstanceId, GroupId> m_instanceGroupIndex;
+    QSet<InstanceId> instanceSet;
+    bool m_groupsLoaded = false;
+    bool m_instancesProbed = false;
+};