refactor: move general info from Mod to Resource

This allows us to create other resources that are not Mods, but can
still share a significant portion of code.

Signed-off-by: flow <flowlnlnln@gmail.com>

launcher/minecraft/mod/Resource.h

@@ -0,0 +1,74 @@
+#pragma once
+
+#include <QDateTime>
+#include <QFileInfo>
+#include <QObject>
+
+#include "QObjectPtr.h"
+
+enum class ResourceType {
+    UNKNOWN,     //!< Indicates an unspecified resource type.
+    ZIPFILE,     //!< The resource is a zip file containing the resource's class files.
+    SINGLEFILE,  //!< The resource is a single file (not a zip file).
+    FOLDER,      //!< The resource is in a folder on the filesystem.
+    LITEMOD,     //!< The resource is a litemod
+};
+
+/** General class for managed resources. It mirrors a file in disk, with some more info
+ *  for display and house-keeping purposes.
+ *
+ *  Subclass it to add additional data / behavior, such as Mods or Resource packs.
+ */
+class Resource : public QObject {
+    Q_OBJECT
+    Q_DISABLE_COPY(Resource)
+   public:
+    using Ptr = shared_qobject_ptr<Resource>;
+
+    Resource(QObject* parent = nullptr);
+    Resource(QFileInfo file_info);
+    ~Resource() override = default;
+
+    void setFile(QFileInfo file_info);
+    void parseFile();
+
+    [[nodiscard]] auto fileinfo() const -> QFileInfo { return m_file_info; }
+    [[nodiscard]] auto dateTimeChanged() const -> QDateTime { return m_changed_date_time; }
+    [[nodiscard]] auto internal_id() const -> QString { return m_internal_id; }
+    [[nodiscard]] auto type() const -> ResourceType { return m_type; }
+
+    [[nodiscard]] virtual auto name() const -> QString { return m_name; }
+    [[nodiscard]] virtual bool valid() const { return m_type != ResourceType::UNKNOWN; }
+
+    [[nodiscard]] auto shouldResolve() const -> bool { return !m_is_resolving && !m_is_resolved; }
+    [[nodiscard]] auto isResolving() const -> bool { return m_is_resolving; }
+    [[nodiscard]] auto resolutionTicket() const -> int { return m_resolution_ticket; }
+
+    void setResolving(bool resolving, int resolutionTicket)
+    {
+        m_is_resolving = resolving;
+        m_resolution_ticket = resolutionTicket;
+    }
+
+    // Delete all files of this resource.
+    bool destroy();
+
+   protected:
+    /* The file corresponding to this resource. */
+    QFileInfo m_file_info;
+    /* The cached date when this file was last changed. */
+    QDateTime m_changed_date_time;
+
+    /* Internal ID for internal purposes. Properties such as human-readability should not be assumed. */
+    QString m_internal_id;
+    /* Name as reported via the file name. In the absence of a better name, this is shown to the user. */
+    QString m_name;
+
+    /* The type of file we're dealing with. */
+    ResourceType m_type = ResourceType::UNKNOWN;
+
+    /* Used to keep trach of pending / concluded actions on the resource. */
+    bool m_is_resolving = false;
+    bool m_is_resolved = false;
+    int m_resolution_ticket = 0;
+};