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>

9 files changed, 150 insertions, 110 deletions

diff --git a/launcher/CMakeLists.txt b/launcher/CMakeLists.txt
index cff07b4b..70997e51 100644
--- a/launcher/CMakeLists.txt
+++ b/launcher/CMakeLists.txt
@@ -318,6 +318,8 @@ set(MINECRAFT_SOURCES
     minecraft/mod/ModDetails.h
     minecraft/mod/ModFolderModel.h
     minecraft/mod/ModFolderModel.cpp
+    minecraft/mod/Resource.h
+    minecraft/mod/Resource.cpp
     minecraft/mod/ResourcePackFolderModel.h
     minecraft/mod/ResourcePackFolderModel.cpp
     minecraft/mod/TexturePackFolderModel.h
diff --git a/launcher/MMCZip.cpp b/launcher/MMCZip.cpp
index 04ca5094..9f4e968f 100644
--- a/launcher/MMCZip.cpp
+++ b/launcher/MMCZip.cpp
@@ -148,7 +148,7 @@ bool MMCZip::createModdedJar(QString sourceJarPath, QString targetJarPath, const
         // do not merge disabled mods.
         if (!mod->enabled())
             continue;
-        if (mod->type() == Mod::MOD_ZIPFILE)
+        if (mod->type() == ResourceType::ZIPFILE)
         {
             if (!mergeZipFiles(&zipOut, mod->fileinfo(), addedFiles))
             {
@@ -158,7 +158,7 @@ bool MMCZip::createModdedJar(QString sourceJarPath, QString targetJarPath, const
                 return false;
             }
         }
-        else if (mod->type() == Mod::MOD_SINGLEFILE)
+        else if (mod->type() == ResourceType::SINGLEFILE)
         {
             // FIXME: buggy - does not work with addedFiles
             auto filename = mod->fileinfo();
@@ -171,7 +171,7 @@ bool MMCZip::createModdedJar(QString sourceJarPath, QString targetJarPath, const
             }
             addedFiles.insert(filename.fileName());
         }
-        else if (mod->type() == Mod::MOD_FOLDER)
+        else if (mod->type() == ResourceType::FOLDER)
         {
             // untested, but seems to be unused / not possible to reach
             // FIXME: buggy - does not work with addedFiles
diff --git a/launcher/minecraft/MinecraftInstance.cpp b/launcher/minecraft/MinecraftInstance.cpp
index c677b677..b42aeda3 100644
--- a/launcher/minecraft/MinecraftInstance.cpp
+++ b/launcher/minecraft/MinecraftInstance.cpp
@@ -714,7 +714,7 @@ QStringList MinecraftInstance::verboseDescription(AuthSessionPtr session, Minecr
             });
             for(auto mod: modList)
             {
-                if(mod->type() == Mod::MOD_FOLDER)
+                if(mod->type() == ResourceType::FOLDER)
                 {
                     out << u8"  [🖿] " + mod->fileinfo().completeBaseName() + " (folder)";
                     continue;
diff --git a/launcher/minecraft/mod/Mod.cpp b/launcher/minecraft/mod/Mod.cpp
index 588d76e3..f28fd32a 100644
--- a/launcher/minecraft/mod/Mod.cpp
+++ b/launcher/minecraft/mod/Mod.cpp
@@ -36,13 +36,10 @@
 
 #include "Mod.h"
 
+#include <QDebug>
 #include <QDir>
 #include <QString>
 
-#include <FileSystem.h>
-#include <QDebug>
-
-#include "Application.h"
 #include "MetadataHandler.h"
 
 namespace {
@@ -51,75 +48,27 @@ ModDetails invalidDetails;
 
 }
 
-Mod::Mod(const QFileInfo& file)
+Mod::Mod(const QFileInfo& file) : Resource(file)
 {
-    repath(file);
-    m_changedDateTime = file.lastModified();
+    m_enabled = (file.suffix() != "disabled");
 }
 
 Mod::Mod(const QDir& mods_dir, const Metadata::ModStruct& metadata)
-    : m_file(mods_dir.absoluteFilePath(metadata.filename))
-    , m_internal_id(metadata.filename)
-    , m_name(metadata.name)
+    : Mod(mods_dir.absoluteFilePath(metadata.filename))
 {
-    if (m_file.isDir()) {
-        m_type = MOD_FOLDER;
-    } else {
-        if (metadata.filename.endsWith(".zip") || metadata.filename.endsWith(".jar"))
-            m_type = MOD_ZIPFILE;
-        else if (metadata.filename.endsWith(".litemod"))
-            m_type = MOD_LITEMOD;
-        else
-            m_type = MOD_SINGLEFILE;
-    }
-
-    m_enabled = true;
-    m_changedDateTime = m_file.lastModified();
-
+    m_name = metadata.name;
     m_temp_metadata = std::make_shared<Metadata::ModStruct>(std::move(metadata));
 }
 
-void Mod::repath(const QFileInfo& file)
-{
-    m_file = file;
-    QString name_base = file.fileName();
-
-    m_type = Mod::MOD_UNKNOWN;
-
-    m_internal_id = name_base;
-
-    if (m_file.isDir()) {
-        m_type = MOD_FOLDER;
-        m_name = name_base;
-    } else if (m_file.isFile()) {
-        if (name_base.endsWith(".disabled")) {
-            m_enabled = false;
-            name_base.chop(9);
-        } else {
-            m_enabled = true;
-        }
-        if (name_base.endsWith(".zip") || name_base.endsWith(".jar")) {
-            m_type = MOD_ZIPFILE;
-            name_base.chop(4);
-        } else if (name_base.endsWith(".litemod")) {
-            m_type = MOD_LITEMOD;
-            name_base.chop(8);
-        } else {
-            m_type = MOD_SINGLEFILE;
-        }
-        m_name = name_base;
-    }
-}
-
 auto Mod::enable(bool value) -> bool
 {
-    if (m_type == Mod::MOD_UNKNOWN || m_type == Mod::MOD_FOLDER)
+    if (m_type == ResourceType::UNKNOWN || m_type == ResourceType::FOLDER)
         return false;
 
     if (m_enabled == value)
         return false;
 
-    QString path = m_file.absoluteFilePath();
+    QString path = m_file_info.absoluteFilePath();
     QFile file(path);
     if (value) {
         if (!path.endsWith(".disabled"))
@@ -136,7 +85,7 @@ auto Mod::enable(bool value) -> bool
     }
 
     if (status() == ModStatus::NoMetadata)
-        repath(QFileInfo(path));
+        setFile(QFileInfo(path));
 
     m_enabled = value;
     return true;
@@ -175,8 +124,7 @@ auto Mod::destroy(QDir& index_dir, bool preserve_metadata) -> bool
         }
     }
 
-    m_type = MOD_UNKNOWN;
-    return FS::deletePath(m_file.filePath());
+    return Resource::destroy();
 }
 
 auto Mod::details() const -> const ModDetails&
@@ -239,8 +187,8 @@ auto Mod::metadata() const -> const std::shared_ptr<Metadata::ModStruct>
 
 void Mod::finishResolvingWithDetails(std::shared_ptr<ModDetails> details)
 {
-    m_resolving = false;
-    m_resolved = true;
+    m_is_resolving = false;
+    m_is_resolved = true;
     m_localDetails = details;
 
     setStatus(m_temp_status);
diff --git a/launcher/minecraft/mod/Mod.h b/launcher/minecraft/mod/Mod.h
index 7a13e44b..313c478c 100644
--- a/launcher/minecraft/mod/Mod.h
+++ b/launcher/minecraft/mod/Mod.h
@@ -39,38 +39,23 @@
 #include <QFileInfo>
 #include <QList>
 
-#include "QObjectPtr.h"
+#include "Resource.h"
 #include "ModDetails.h"
 
-class Mod : public QObject
+class Mod : public Resource
 {
     Q_OBJECT
 public:
-    enum ModType
-    {
-        MOD_UNKNOWN,    //!< Indicates an unspecified mod type.
-        MOD_ZIPFILE,    //!< The mod is a zip file containing the mod's class files.
-        MOD_SINGLEFILE, //!< The mod is a single file (not a zip file).
-        MOD_FOLDER,     //!< The mod is in a folder on the filesystem.
-        MOD_LITEMOD,    //!< The mod is a litemod
-    };
-
     using Ptr = shared_qobject_ptr<Mod>;
 
     Mod() = default;
     Mod(const QFileInfo &file);
     explicit Mod(const QDir& mods_dir, const Metadata::ModStruct& metadata);
 
-    auto fileinfo()        const -> QFileInfo { return m_file; }
-    auto dateTimeChanged() const -> QDateTime { return m_changedDateTime; }
-    auto internal_id()     const -> QString { return m_internal_id; }
-    auto type()            const -> ModType { return m_type; }
     auto enabled()         const -> bool { return m_enabled; }
 
-    auto valid() const -> bool { return m_type != MOD_UNKNOWN; }
-
     auto details()     const -> const ModDetails&;
-    auto name()        const -> QString;
+    auto name()        const -> QString override;
     auto version()     const -> QString;
     auto homeurl()     const -> QString;
     auto description() const -> QString;
@@ -85,31 +70,12 @@ public:
 
     auto enable(bool value) -> bool;
 
-    // delete all the files of this mod
+    // Delete all the files of this mod
     auto destroy(QDir& index_dir, bool preserve_metadata = false) -> bool;
 
-    // change the mod's filesystem path (used by mod lists for *MAGIC* purposes)
-    void repath(const QFileInfo &file);
-
-    auto shouldResolve()    const -> bool { return !m_resolving && !m_resolved; }
-    auto isResolving()      const -> bool { return m_resolving; }
-    auto resolutionTicket() const -> int  { return m_resolutionTicket; }
-
-    void setResolving(bool resolving, int resolutionTicket) {
-        m_resolving = resolving;
-        m_resolutionTicket = resolutionTicket;
-    }
     void finishResolvingWithDetails(std::shared_ptr<ModDetails> details);
 
 protected:
-    QFileInfo m_file;
-    QDateTime m_changedDateTime;
-
-    QString m_internal_id;
-    /* Name as reported via the file name */
-    QString m_name;
-    ModType m_type = MOD_UNKNOWN;
-
     /* If the mod has metadata, this will be filled in the constructor, and passed to 
      * the ModDetails when calling finishResolvingWithDetails */
     std::shared_ptr<Metadata::ModStruct> m_temp_metadata;
@@ -120,7 +86,4 @@ protected:
     std::shared_ptr<ModDetails> m_localDetails;
 
     bool m_enabled = true;
-    bool m_resolving = false;
-    bool m_resolved = false;
-    int m_resolutionTicket = 0;
 };
diff --git a/launcher/minecraft/mod/Resource.cpp b/launcher/minecraft/mod/Resource.cpp
new file mode 100644
index 00000000..8771a20f
--- /dev/null
+++ b/launcher/minecraft/mod/Resource.cpp
@@ -0,0 +1,53 @@
+#include "Resource.h"
+
+#include "FileSystem.h"
+
+Resource::Resource(QObject* parent) : QObject(parent) {}
+
+Resource::Resource(QFileInfo file_info) : QObject()
+{
+    setFile(file_info);
+}
+
+void Resource::setFile(QFileInfo file_info)
+{
+    m_file_info = file_info;
+    parseFile();
+}
+
+void Resource::parseFile()
+{
+    QString file_name{ m_file_info.fileName() };
+
+    m_type = ResourceType::UNKNOWN;
+
+    m_internal_id = file_name;
+
+    if (m_file_info.isDir()) {
+        m_type = ResourceType::FOLDER;
+        m_name = file_name;
+    } else if (m_file_info.isFile()) {
+        if (file_name.endsWith(".disabled"))
+            file_name.chop(9);
+
+        if (file_name.endsWith(".zip") || file_name.endsWith(".jar")) {
+            m_type = ResourceType::ZIPFILE;
+            file_name.chop(4);
+        } else if (file_name.endsWith(".litemod")) {
+            m_type = ResourceType::LITEMOD;
+            file_name.chop(8);
+        } else {
+            m_type = ResourceType::SINGLEFILE;
+        }
+
+        m_name = file_name;
+    }
+
+    m_changed_date_time = m_file_info.lastModified();
+}
+
+bool Resource::destroy()
+{
+    m_type = ResourceType::UNKNOWN;
+    return FS::deletePath(m_file_info.filePath());
+}
diff --git a/launcher/minecraft/mod/Resource.h b/launcher/minecraft/mod/Resource.h
new file mode 100644
index 00000000..c348c7e2
--- /dev/null
+++ b/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;
+};
diff --git a/launcher/modplatform/EnsureMetadataTask.cpp b/launcher/modplatform/EnsureMetadataTask.cpp
index 60c54c4e..21c20b28 100644
--- a/launcher/modplatform/EnsureMetadataTask.cpp
+++ b/launcher/modplatform/EnsureMetadataTask.cpp
@@ -110,7 +110,7 @@ void EnsureMetadataTask::executeTask()
         }
 
         // Folders don't have metadata
-        if (mod->type() == Mod::MOD_FOLDER) {
+        if (mod->type() == ResourceType::FOLDER) {
             emitReady(mod);
         }
     }
diff --git a/launcher/ui/widgets/MCModInfoFrame.cpp b/launcher/ui/widgets/MCModInfoFrame.cpp
index 7d78006b..22475abc 100644
--- a/launcher/ui/widgets/MCModInfoFrame.cpp
+++ b/launcher/ui/widgets/MCModInfoFrame.cpp
@@ -23,7 +23,7 @@
 
 void MCModInfoFrame::updateWithMod(Mod &m)
 {
-    if (m.type() == m.MOD_FOLDER)
+    if (m.type() == ResourceType::FOLDER)
     {
         clear();
         return;