Merge pull request #1359 from Trial97/import

11 files changed, 646 insertions, 12 deletions

diff --git a/launcher/CMakeLists.txt b/launcher/CMakeLists.txt
index 2d06dbf4..302d39e6 100644
--- a/launcher/CMakeLists.txt
+++ b/launcher/CMakeLists.txt
@@ -501,6 +501,11 @@ set(FTB_SOURCES
     modplatform/legacy_ftb/PrivatePackManager.cpp
 
     modplatform/legacy_ftb/PackHelpers.h
+
+    modplatform/import_ftb/PackInstallTask.h
+    modplatform/import_ftb/PackInstallTask.cpp
+    modplatform/import_ftb/PackHelpers.h
+    modplatform/import_ftb/PackHelpers.cpp
 )
 
 set(FLAME_SOURCES
@@ -872,6 +877,11 @@ SET(LAUNCHER_SOURCES
     ui/pages/modplatform/legacy_ftb/ListModel.h
     ui/pages/modplatform/legacy_ftb/ListModel.cpp
 
+    ui/pages/modplatform/import_ftb/ImportFTBPage.cpp
+    ui/pages/modplatform/import_ftb/ImportFTBPage.h
+    ui/pages/modplatform/import_ftb/ListModel.h
+    ui/pages/modplatform/import_ftb/ListModel.cpp
+
     ui/pages/modplatform/flame/FlameModel.cpp
     ui/pages/modplatform/flame/FlameModel.h
     ui/pages/modplatform/flame/FlamePage.cpp
@@ -1046,6 +1056,7 @@ qt_wrap_ui(LAUNCHER_UI
     ui/pages/modplatform/ResourcePage.ui
     ui/pages/modplatform/flame/FlamePage.ui
     ui/pages/modplatform/legacy_ftb/Page.ui
+    ui/pages/modplatform/import_ftb/ImportFTBPage.ui
     ui/pages/modplatform/ImportPage.ui
     ui/pages/modplatform/modrinth/ModrinthPage.ui
     ui/pages/modplatform/technic/TechnicPage.ui
diff --git a/launcher/modplatform/import_ftb/PackHelpers.cpp b/launcher/modplatform/import_ftb/PackHelpers.cpp
new file mode 100644
index 00000000..4a1bbef9
--- /dev/null
+++ b/launcher/modplatform/import_ftb/PackHelpers.cpp
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ *  Prism Launcher - Minecraft Launcher
+ *  Copyright (c) 2023 Trial97 <alexandru.tripon97@gmail.com>
+ *
+ *  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, version 3.
+ *
+ *  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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "modplatform/import_ftb/PackHelpers.h"
+
+#include <QIcon>
+#include <QString>
+#include <QVariant>
+
+#include "FileSystem.h"
+#include "Json.h"
+
+namespace FTBImportAPP {
+
+Modpack parseDirectory(QString path)
+{
+    Modpack modpack{ path };
+    auto instanceFile = QFileInfo(FS::PathCombine(path, "instance.json"));
+    if (!instanceFile.exists() || !instanceFile.isFile())
+        return {};
+    try {
+        auto doc = Json::requireDocument(instanceFile.absoluteFilePath(), "FTB_APP instance JSON file");
+        const auto root = doc.object();
+        modpack.uuid = Json::requireString(root, "uuid", "uuid");
+        modpack.id = Json::requireInteger(root, "id", "id");
+        modpack.versionId = Json::requireInteger(root, "versionId", "versionId");
+        modpack.name = Json::requireString(root, "name", "name");
+        modpack.version = Json::requireString(root, "version", "version");
+        modpack.mcVersion = Json::requireString(root, "mcVersion", "mcVersion");
+        modpack.jvmArgs = Json::ensureVariant(root, "jvmArgs", {}, "jvmArgs");
+    } catch (const Exception& e) {
+        qDebug() << "Couldn't load ftb instance json: " << e.cause();
+        return {};
+    }
+    auto versionsFile = QFileInfo(FS::PathCombine(path, "version.json"));
+    if (!versionsFile.exists() || !versionsFile.isFile())
+        return {};
+    try {
+        auto doc = Json::requireDocument(versionsFile.absoluteFilePath(), "FTB_APP version JSON file");
+        const auto root = doc.object();
+        auto targets = Json::requireArray(root, "targets", "targets");
+
+        for (auto target : targets) {
+            auto obj = Json::requireObject(target, "target");
+            auto name = Json::requireString(obj, "name", "name");
+            auto version = Json::requireString(obj, "version", "version");
+            if (name == "forge") {
+                modpack.loaderType = ResourceAPI::Forge;
+                modpack.version = version;
+                break;
+            } else if (name == "fabric") {
+                modpack.loaderType = ResourceAPI::Fabric;
+                modpack.version = version;
+                break;
+            } else if (name == "quilt") {
+                modpack.loaderType = ResourceAPI::Quilt;
+                modpack.version = version;
+                break;
+            }
+        }
+    } catch (const Exception& e) {
+        qDebug() << "Couldn't load ftb version json: " << e.cause();
+        return {};
+    }
+    auto iconFile = QFileInfo(FS::PathCombine(path, "folder.jpg"));
+    if (iconFile.exists() && iconFile.isFile()) {
+        modpack.icon = QIcon(iconFile.absoluteFilePath());
+    }
+    return modpack;
+}
+
+}  // namespace FTBImportAPP
diff --git a/launcher/modplatform/import_ftb/PackHelpers.h b/launcher/modplatform/import_ftb/PackHelpers.h
new file mode 100644
index 00000000..8ea4f3fa
--- /dev/null
+++ b/launcher/modplatform/import_ftb/PackHelpers.h
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ *  Prism Launcher - Minecraft Launcher
+ *  Copyright (c) 2023 Trial97 <alexandru.tripon97@gmail.com>
+ *
+ *  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, version 3.
+ *
+ *  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 <https://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include <QIcon>
+#include <QList>
+#include <QMetaType>
+#include <QString>
+#include <QVariant>
+#include "modplatform/ResourceAPI.h"
+
+namespace FTBImportAPP {
+
+struct Modpack {
+    QString path;
+
+    // json data
+    QString uuid;
+    int id;
+    int versionId;
+    QString name;
+    QString version;
+    QString mcVersion;
+    // not needed for instance creation
+    QVariant jvmArgs;
+
+    std::optional<ResourceAPI::ModLoaderType> loaderType;
+    QString loaderVersion;
+
+    QIcon icon;
+};
+
+typedef QList<Modpack> ModpackList;
+
+Modpack parseDirectory(QString path);
+
+}  // namespace FTBImportAPP
+
+// We need it for the proxy model
+Q_DECLARE_METATYPE(FTBImportAPP::Modpack)
diff --git a/launcher/modplatform/import_ftb/PackInstallTask.cpp b/launcher/modplatform/import_ftb/PackInstallTask.cpp
new file mode 100644
index 00000000..b5e424d1
--- /dev/null
+++ b/launcher/modplatform/import_ftb/PackInstallTask.cpp
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ *  Prism Launcher - Minecraft Launcher
+ *  Copyright (c) 2023 Trial97 <alexandru.tripon97@gmail.com>
+ *
+ *  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, version 3.
+ *
+ *  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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "PackInstallTask.h"
+
+#include <QtConcurrent>
+
+#include "BaseInstance.h"
+#include "FileSystem.h"
+#include "minecraft/MinecraftInstance.h"
+#include "minecraft/PackProfile.h"
+#include "modplatform/ResourceAPI.h"
+#include "modplatform/import_ftb/PackHelpers.h"
+#include "settings/INISettingsObject.h"
+
+namespace FTBImportAPP {
+
+void PackInstallTask::executeTask()
+{
+    setStatus(tr("Copying files..."));
+    setAbortable(false);
+    progress(1, 2);
+
+    m_copyFuture = QtConcurrent::run(QThreadPool::globalInstance(), [this] {
+        FS::copy folderCopy(m_pack.path, FS::PathCombine(m_stagingPath, ".minecraft"));
+        folderCopy.followSymlinks(true);
+        return folderCopy();
+    });
+    connect(&m_copyFutureWatcher, &QFutureWatcher<bool>::finished, this, &PackInstallTask::copySettings);
+    connect(&m_copyFutureWatcher, &QFutureWatcher<bool>::canceled, this, &PackInstallTask::emitAborted);
+    m_copyFutureWatcher.setFuture(m_copyFuture);
+}
+
+void PackInstallTask::copySettings()
+{
+    setStatus(tr("Copying settings..."));
+    progress(2, 2);
+    QString instanceConfigPath = FS::PathCombine(m_stagingPath, "instance.cfg");
+    auto instanceSettings = std::make_shared<INISettingsObject>(instanceConfigPath);
+    instanceSettings->suspendSave();
+    MinecraftInstance instance(m_globalSettings, instanceSettings, m_stagingPath);
+    instance.settings()->set("InstanceType", "OneSix");
+
+    if (m_pack.jvmArgs.isValid() && !m_pack.jvmArgs.toString().isEmpty()) {
+        instance.settings()->set("OverrideJavaArgs", true);
+        instance.settings()->set("JvmArgs", m_pack.jvmArgs.toString());
+    }
+
+    auto components = instance.getPackProfile();
+    components->buildingFromScratch();
+    components->setComponentVersion("net.minecraft", m_pack.mcVersion, true);
+
+    auto modloader = m_pack.loaderType;
+    if (modloader.has_value())
+        switch (modloader.value()) {
+            case ResourceAPI::Forge: {
+                components->setComponentVersion("net.minecraftforge", m_pack.version, true);
+                break;
+            }
+            case ResourceAPI::Fabric: {
+                components->setComponentVersion("net.fabricmc.fabric-loader", m_pack.version, true);
+                break;
+            }
+            case ResourceAPI::Quilt: {
+                components->setComponentVersion("org.quiltmc.quilt-loader", m_pack.version, true);
+                break;
+            }
+            case ResourceAPI::Cauldron:
+                break;
+            case ResourceAPI::LiteLoader:
+                break;
+        }
+    components->saveNow();
+
+    instance.setName(name());
+    if (m_instIcon == "default")
+        m_instIcon = "ftb_logo";
+    instance.setIconKey(m_instIcon);
+    instanceSettings->resumeSave();
+
+    emitSucceeded();
+}
+
+}  // namespace FTBImportAPP
diff --git a/launcher/modplatform/import_ftb/PackInstallTask.h b/launcher/modplatform/import_ftb/PackInstallTask.h
new file mode 100644
index 00000000..842e4b35
--- /dev/null
+++ b/launcher/modplatform/import_ftb/PackInstallTask.h
@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ *  Prism Launcher - Minecraft Launcher
+ *  Copyright (c) 2023 Trial97 <alexandru.tripon97@gmail.com>
+ *
+ *  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, version 3.
+ *
+ *  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 <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QFuture>
+#include <QFutureWatcher>
+
+#include "InstanceTask.h"
+#include "PackHelpers.h"
+
+namespace FTBImportAPP {
+
+class PackInstallTask : public InstanceTask {
+    Q_OBJECT
+
+   public:
+    explicit PackInstallTask(const Modpack& pack) : m_pack(pack) {}
+    virtual ~PackInstallTask() = default;
+
+   protected:
+    virtual void executeTask() override;
+
+   private slots:
+    void copySettings();
+
+   private:
+    QFuture<bool> m_copyFuture;
+    QFutureWatcher<bool> m_copyFutureWatcher;
+
+    const Modpack m_pack;
+};
+
+}  // namespace FTBImportAPP
diff --git a/launcher/ui/dialogs/NewInstanceDialog.cpp b/launcher/ui/dialogs/NewInstanceDialog.cpp
index 7b9bb944..76b139fc 100644
--- a/launcher/ui/dialogs/NewInstanceDialog.cpp
+++ b/launcher/ui/dialogs/NewInstanceDialog.cpp
@@ -33,38 +33,37 @@
  *      limitations under the License.
  */
 
-#include "Application.h"
 #include "NewInstanceDialog.h"
+#include "Application.h"
+#include "ui/pages/modplatform/import_ftb/ImportFTBPage.h"
 #include "ui_NewInstanceDialog.h"
 
 #include <BaseVersion.h>
+#include <InstanceList.h>
 #include <icons/IconList.h>
 #include <tasks/Task.h>
-#include <InstanceList.h>
 
-#include "VersionSelectDialog.h"
-#include "ProgressDialog.h"
 #include "IconPickerDialog.h"
+#include "ProgressDialog.h"
+#include "VersionSelectDialog.h"
 
+#include <QDialogButtonBox>
+#include <QFileDialog>
 #include <QLayout>
 #include <QPushButton>
-#include <QFileDialog>
 #include <QValidator>
-#include <QDialogButtonBox>
 #include <utility>
 
-#include "ui/widgets/PageContainer.h"
 #include "ui/pages/modplatform/CustomPage.h"
+#include "ui/pages/modplatform/ImportPage.h"
 #include "ui/pages/modplatform/atlauncher/AtlPage.h"
-#include "ui/pages/modplatform/legacy_ftb/Page.h"
 #include "ui/pages/modplatform/flame/FlamePage.h"
-#include "ui/pages/modplatform/ImportPage.h"
+#include "ui/pages/modplatform/legacy_ftb/Page.h"
 #include "ui/pages/modplatform/modrinth/ModrinthPage.h"
 #include "ui/pages/modplatform/technic/TechnicPage.h"
+#include "ui/widgets/PageContainer.h"
 
-
-
-NewInstanceDialog::NewInstanceDialog(const QString & initialGroup, const QString & url, QWidget *parent)
+NewInstanceDialog::NewInstanceDialog(const QString& initialGroup, const QString& url, QWidget* parent)
     : QDialog(parent), ui(new Ui::NewInstanceDialog)
 {
     ui->setupUi(this);
@@ -168,6 +167,7 @@ QList<BasePage *> NewInstanceDialog::getPages()
     if (APPLICATION->capabilities() & Application::SupportsFlame)
         pages.append(new FlamePage(this));
     pages.append(new LegacyFTB::Page(this));
+    pages.append(new FTBImportAPP::ImportFTBPage(this));
     pages.append(new ModrinthPage(this));
     pages.append(new TechnicPage(this));
 
diff --git a/launcher/ui/pages/modplatform/import_ftb/ImportFTBPage.cpp b/launcher/ui/pages/modplatform/import_ftb/ImportFTBPage.cpp
new file mode 100644
index 00000000..5c9ff63b
--- /dev/null
+++ b/launcher/ui/pages/modplatform/import_ftb/ImportFTBPage.cpp
@@ -0,0 +1,104 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ *  Prism Launcher - Minecraft Launcher
+ *  Copyright (c) 2023 Trial97 <alexandru.tripon97@gmail.com>
+ *
+ *  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, version 3.
+ *
+ *  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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "ImportFTBPage.h"
+#include "ui_ImportFTBPage.h"
+
+#include <QWidget>
+#include "FileSystem.h"
+#include "ListModel.h"
+#include "modplatform/import_ftb/PackInstallTask.h"
+#include "ui/dialogs/NewInstanceDialog.h"
+
+namespace FTBImportAPP {
+
+ImportFTBPage::ImportFTBPage(NewInstanceDialog* dialog, QWidget* parent) : QWidget(parent), dialog(dialog), ui(new Ui::ImportFTBPage)
+{
+    ui->setupUi(this);
+
+    {
+        listModel = new ListModel(this);
+
+        ui->modpackList->setModel(listModel);
+        ui->modpackList->setSortingEnabled(true);
+        ui->modpackList->header()->hide();
+        ui->modpackList->setIndentation(0);
+        ui->modpackList->setIconSize(QSize(42, 42));
+    }
+
+    connect(ui->modpackList->selectionModel(), &QItemSelectionModel::currentChanged, this, &ImportFTBPage::onPublicPackSelectionChanged);
+
+    ui->modpackList->selectionModel()->reset();
+}
+
+ImportFTBPage::~ImportFTBPage()
+{
+    delete ui;
+}
+
+void ImportFTBPage::openedImpl()
+{
+    if (!initialized) {
+        listModel->update();
+        initialized = true;
+    }
+    suggestCurrent();
+}
+
+void ImportFTBPage::retranslate()
+{
+    ui->retranslateUi(this);
+}
+
+void ImportFTBPage::suggestCurrent()
+{
+    if (!isOpened)
+        return;
+
+    if (selected.path.isEmpty()) {
+        dialog->setSuggestedPack();
+        return;
+    }
+
+    dialog->setSuggestedPack(selected.name, new PackInstallTask(selected));
+    QString editedLogoName = QString("ftb_%1").arg(selected.id);
+    dialog->setSuggestedIconFromFile(FS::PathCombine(selected.path, "folder.jpg"), editedLogoName);
+}
+
+void ImportFTBPage::onPublicPackSelectionChanged(QModelIndex now, QModelIndex prev)
+{
+    if (!now.isValid()) {
+        onPackSelectionChanged();
+        return;
+    }
+    Modpack selectedPack = listModel->data(now, Qt::UserRole).value<Modpack>();
+    onPackSelectionChanged(&selectedPack);
+}
+
+void ImportFTBPage::onPackSelectionChanged(Modpack* pack)
+{
+    if (pack) {
+        selected = *pack;
+        suggestCurrent();
+        return;
+    }
+    if (isOpened)
+        dialog->setSuggestedPack();
+}
+
+}  // namespace FTBImportAPP
diff --git a/launcher/ui/pages/modplatform/import_ftb/ImportFTBPage.h b/launcher/ui/pages/modplatform/import_ftb/ImportFTBPage.h
new file mode 100644
index 00000000..54c49f7b
--- /dev/null
+++ b/launcher/ui/pages/modplatform/import_ftb/ImportFTBPage.h
@@ -0,0 +1,67 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ *  Prism Launcher - Minecraft Launcher
+ *  Copyright (c) 2023 Trial97 <alexandru.tripon97@gmail.com>
+ *
+ *  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, version 3.
+ *
+ *  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 <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QDialog>
+#include <QTextBrowser>
+#include <QTreeView>
+#include <QWidget>
+
+#include <Application.h>
+#include "modplatform/import_ftb/PackHelpers.h"
+#include "ui/pages/BasePage.h"
+#include "ui/pages/modplatform/import_ftb/ListModel.h"
+
+class NewInstanceDialog;
+
+namespace FTBImportAPP {
+namespace Ui {
+class ImportFTBPage;
+}
+
+class ImportFTBPage : public QWidget, public BasePage {
+    Q_OBJECT
+
+   public:
+    explicit ImportFTBPage(NewInstanceDialog* dialog, QWidget* parent = 0);
+    virtual ~ImportFTBPage();
+    QString displayName() const override { return tr("FTB App Import"); }
+    QIcon icon() const override { return APPLICATION->getThemedIcon("ftb_logo"); }
+    QString id() const override { return "import_ftb"; }
+    QString helpPage() const override { return "FTB-platform"; }
+    bool shouldDisplay() const override { return true; }
+    void openedImpl() override;
+    void retranslate() override;
+
+   private:
+    void suggestCurrent();
+    void onPackSelectionChanged(Modpack* pack = nullptr);
+   private slots:
+    void onPublicPackSelectionChanged(QModelIndex first, QModelIndex second);
+
+   private:
+    bool initialized = false;
+    Modpack selected;
+    ListModel* listModel = nullptr;
+
+    NewInstanceDialog* dialog = nullptr;
+    Ui::ImportFTBPage* ui = nullptr;
+};
+
+}  // namespace FTBImportAPP
diff --git a/launcher/ui/pages/modplatform/import_ftb/ImportFTBPage.ui b/launcher/ui/pages/modplatform/import_ftb/ImportFTBPage.ui
new file mode 100644
index 00000000..32d548b0
--- /dev/null
+++ b/launcher/ui/pages/modplatform/import_ftb/ImportFTBPage.ui
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>FTBImportAPP::ImportFTBPage</class>
+ <widget class="QWidget" name="FTBImportAPP::ImportFTBPage">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>1461</width>
+    <height>1011</height>
+   </rect>
+  </property>
+  <layout class="QHBoxLayout" name="horizontalLayout">
+   <item>
+    <widget class="QTreeView" name="modpackList">
+     <property name="maximumSize">
+      <size>
+       <width>16777215</width>
+       <height>16777215</height>
+      </size>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>
diff --git a/launcher/ui/pages/modplatform/import_ftb/ListModel.cpp b/launcher/ui/pages/modplatform/import_ftb/ListModel.cpp
new file mode 100644
index 00000000..dc78f451
--- /dev/null
+++ b/launcher/ui/pages/modplatform/import_ftb/ListModel.cpp
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ *  Prism Launcher - Minecraft Launcher
+ *  Copyright (c) 2023 Trial97 <alexandru.tripon97@gmail.com>
+ *
+ *  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, version 3.
+ *
+ *  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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "ListModel.h"
+#include <QDir>
+#include <QDirIterator>
+#include <QFileInfo>
+#include <QIcon>
+#include <QProcessEnvironment>
+#include "FileSystem.h"
+#include "modplatform/import_ftb/PackHelpers.h"
+
+namespace FTBImportAPP {
+
+QString getPath()
+{
+    QString partialPath;
+#if defined(Q_OS_OSX)
+    partialPath = FS::PathCombine(QDir::homePath(), "Library/Application Support");
+#elif defined(Q_OS_WIN32)
+    partialPath = QProcessEnvironment::systemEnvironment().value("LOCALAPPDATA", "");
+#else
+    partialPath = QDir::homePath();
+#endif
+    return FS::PathCombine(partialPath, ".ftba");
+}
+
+const QString ListModel::FTB_APP_PATH = getPath();
+
+void ListModel::update()
+{
+    beginResetModel();
+    modpacks.clear();
+
+    QString instancesPath = FS::PathCombine(FTB_APP_PATH, "instances");
+    if (auto instancesInfo = QFileInfo(instancesPath); instancesInfo.exists() && instancesInfo.isDir()) {
+        QDirIterator directoryIterator(instancesPath, QDir::Dirs | QDir::NoDotAndDotDot | QDir::Readable | QDir::Hidden,
+                                       QDirIterator::FollowSymlinks);
+        while (directoryIterator.hasNext()) {
+            auto modpack = parseDirectory(directoryIterator.next());
+            if (!modpack.path.isEmpty())
+                modpacks.append(modpack);
+        }
+    } else {
+        qDebug() << "Couldn't find ftb instances folder: " << instancesPath;
+    }
+
+    endResetModel();
+}
+
+QVariant ListModel::data(const QModelIndex& index, int role) const
+{
+    int pos = index.row();
+    if (pos >= modpacks.size() || pos < 0 || !index.isValid()) {
+        return QVariant();
+    }
+
+    auto pack = modpacks.at(pos);
+    if (role == Qt::DisplayRole) {
+        return pack.name;
+    } else if (role == Qt::DecorationRole) {
+        return pack.icon;
+    } else if (role == Qt::UserRole) {
+        QVariant v;
+        v.setValue(pack);
+        return v;
+    } else if (role == Qt::ToolTipRole) {
+        return tr("Minecraft %1").arg(pack.mcVersion);
+    }
+
+    return QVariant();
+}
+}  // namespace FTBImportAPP
\ No newline at end of file
diff --git a/launcher/ui/pages/modplatform/import_ftb/ListModel.h b/launcher/ui/pages/modplatform/import_ftb/ListModel.h
new file mode 100644
index 00000000..c67aa896
--- /dev/null
+++ b/launcher/ui/pages/modplatform/import_ftb/ListModel.h
@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ *  Prism Launcher - Minecraft Launcher
+ *  Copyright (c) 2023 Trial97 <alexandru.tripon97@gmail.com>
+ *
+ *  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, version 3.
+ *
+ *  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 <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QAbstractListModel>
+#include <QIcon>
+#include <QVariant>
+#include "modplatform/import_ftb/PackHelpers.h"
+
+namespace FTBImportAPP {
+
+class ListModel : public QAbstractListModel {
+    Q_OBJECT
+
+   public:
+    ListModel(QObject* parent) : QAbstractListModel(parent) {}
+    virtual ~ListModel() = default;
+
+    int rowCount(const QModelIndex& parent) const { return modpacks.size(); }
+    int columnCount(const QModelIndex& parent) const { return 1; }
+    QVariant data(const QModelIndex& index, int role) const;
+
+    void update();
+
+    static const QString FTB_APP_PATH;
+
+   private:
+    ModpackList modpacks;
+};
+}  // namespace FTBImportAPP
\ No newline at end of file