Revert "chore: remove FTB modpack support"

This reverts commit ff07714e8c.

launcher/CMakeLists.txt

@@ -537,6 +537,13 @@ set(MODRINTH_SOURCES
     modplatform/modrinth/ModrinthInstanceCreationTask.h
 )
 
+set(MODPACKSCH_SOURCES
+    modplatform/modpacksch/FTBPackInstallTask.h
+    modplatform/modpacksch/FTBPackInstallTask.cpp
+    modplatform/modpacksch/FTBPackManifest.h
+    modplatform/modpacksch/FTBPackManifest.cpp
+)
+
 set(PACKWIZ_SOURCES
     modplatform/packwiz/Packwiz.h
     modplatform/packwiz/Packwiz.cpp
@@ -666,6 +673,7 @@ set(LOGIC_SOURCES
     ${FTB_SOURCES}
     ${FLAME_SOURCES}
     ${MODRINTH_SOURCES}
+    ${MODPACKSCH_SOURCES}
     ${PACKWIZ_SOURCES}
     ${TECHNIC_SOURCES}
     ${ATLAUNCHER_SOURCES}
@@ -863,6 +871,13 @@ SET(LAUNCHER_SOURCES
     ui/pages/modplatform/atlauncher/AtlUserInteractionSupportImpl.cpp
     ui/pages/modplatform/atlauncher/AtlUserInteractionSupportImpl.h
 
+    ui/pages/modplatform/ftb/FtbFilterModel.cpp
+    ui/pages/modplatform/ftb/FtbFilterModel.h
+    ui/pages/modplatform/ftb/FtbListModel.cpp
+    ui/pages/modplatform/ftb/FtbListModel.h
+    ui/pages/modplatform/ftb/FtbPage.cpp
+    ui/pages/modplatform/ftb/FtbPage.h
+
     ui/pages/modplatform/legacy_ftb/Page.cpp
     ui/pages/modplatform/legacy_ftb/Page.h
     ui/pages/modplatform/legacy_ftb/ListModel.h
@@ -1041,6 +1056,7 @@ qt_wrap_ui(LAUNCHER_UI
     ui/pages/modplatform/flame/FlamePage.ui
     ui/pages/modplatform/legacy_ftb/Page.ui
     ui/pages/modplatform/ImportPage.ui
+    ui/pages/modplatform/ftb/FtbPage.ui
     ui/pages/modplatform/modrinth/ModrinthPage.ui
     ui/pages/modplatform/technic/TechnicPage.ui
     ui/widgets/InstanceCardWidget.ui

launcher/modplatform/modpacksch/FTBPackInstallTask.cpp

@@ -0,0 +1,387 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ *  Prism Launcher - Minecraft Launcher
+ *  Copyright (C) 2022 flowln <flowlnlnln@gmail.com>
+ *  Copyright (c) 2022 Jamie Mansfield <jmansfield@cadixdev.org>
+ *  Copyright (C) 2022 Sefa Eyeoglu <contact@scrumplex.net>
+ *
+ *  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/>.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *
+ *      Copyright 2020-2021 Jamie Mansfield <jmansfield@cadixdev.org>
+ *      Copyright 2020-2021 Petr Mrazek <peterix@gmail.com>
+ *
+ *      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.
+ */
+
+#include "FTBPackInstallTask.h"
+
+#include "FileSystem.h"
+#include "Json.h"
+#include "minecraft/MinecraftInstance.h"
+#include "minecraft/PackProfile.h"
+#include "modplatform/flame/PackManifest.h"
+#include "net/ChecksumValidator.h"
+#include "settings/INISettingsObject.h"
+
+#include "Application.h"
+#include "BuildConfig.h"
+#include "ui/dialogs/BlockedModsDialog.h"
+
+namespace ModpacksCH {
+
+PackInstallTask::PackInstallTask(Modpack pack, QString version, QWidget* parent)
+    : m_pack(std::move(pack)), m_version_name(std::move(version)), m_parent(parent)
+{}
+
+bool PackInstallTask::abort()
+{
+    if (!canAbort())
+        return false;
+
+    bool aborted = true;
+
+    if (m_net_job)
+        aborted &= m_net_job->abort();
+    if (m_mod_id_resolver_task)
+        aborted &= m_mod_id_resolver_task->abort();
+
+    return aborted ? InstanceTask::abort() : false;
+}
+
+void PackInstallTask::executeTask()
+{
+    setStatus(tr("Getting the manifest..."));
+    setAbortable(false);
+
+    // Find pack version
+    auto version_it = std::find_if(m_pack.versions.constBegin(), m_pack.versions.constEnd(),
+                                   [this](ModpacksCH::VersionInfo const& a) { return a.name == m_version_name; });
+
+    if (version_it == m_pack.versions.constEnd()) {
+        emitFailed(tr("Failed to find pack version %1").arg(m_version_name));
+        return;
+    }
+
+    auto version = *version_it;
+
+    auto netJob = makeShared<NetJob>("ModpacksCH::VersionFetch", APPLICATION->network());
+
+    auto searchUrl = QString(BuildConfig.MODPACKSCH_API_BASE_URL + "public/modpack/%1/%2").arg(m_pack.id).arg(version.id);
+    netJob->addNetAction(Net::Download::makeByteArray(QUrl(searchUrl), &m_response));
+
+    QObject::connect(netJob.get(), &NetJob::succeeded, this, &PackInstallTask::onManifestDownloadSucceeded);
+    QObject::connect(netJob.get(), &NetJob::failed, this, &PackInstallTask::onManifestDownloadFailed);
+    QObject::connect(netJob.get(), &NetJob::aborted, this, &PackInstallTask::abort);
+    QObject::connect(netJob.get(), &NetJob::progress, this, &PackInstallTask::setProgress);
+
+    m_net_job = netJob;
+
+    setAbortable(true);
+    netJob->start();
+}
+
+void PackInstallTask::onManifestDownloadSucceeded()
+{
+    m_net_job.reset();
+
+    QJsonParseError parse_error{};
+    QJsonDocument doc = QJsonDocument::fromJson(m_response, &parse_error);
+    if (parse_error.error != QJsonParseError::NoError) {
+        qWarning() << "Error while parsing JSON response from ModpacksCH at " << parse_error.offset
+                   << " reason: " << parse_error.errorString();
+        qWarning() << m_response;
+        return;
+    }
+
+    ModpacksCH::Version version;
+    try {
+        auto obj = Json::requireObject(doc);
+        ModpacksCH::loadVersion(version, obj);
+    } catch (const JSONValidationError& e) {
+        emitFailed(tr("Could not understand pack manifest:\n") + e.cause());
+        return;
+    }
+
+    m_version = version;
+
+    resolveMods();
+}
+
+void PackInstallTask::resolveMods()
+{
+    setStatus(tr("Resolving mods..."));
+    setAbortable(false);
+    setProgress(0, 100);
+
+    m_file_id_map.clear();
+
+    Flame::Manifest manifest;
+    int index = 0;
+
+    for (auto const& file : m_version.files) {
+        if (!file.serverOnly && file.url.isEmpty()) {
+            if (file.curseforge.file_id <= 0) {
+                emitFailed(tr("Invalid manifest: There's no information available to download the file '%1'!").arg(file.name));
+                return;
+            }
+
+            Flame::File flame_file;
+            flame_file.projectId = file.curseforge.project_id;
+            flame_file.fileId = file.curseforge.file_id;
+            flame_file.hash = file.sha1;
+
+            manifest.files.insert(flame_file.fileId, flame_file);
+            m_file_id_map.append(flame_file.fileId);
+        } else {
+            m_file_id_map.append(-1);
+        }
+
+        index++;
+    }
+
+    m_mod_id_resolver_task.reset(new Flame::FileResolvingTask(APPLICATION->network(), manifest));
+
+    connect(m_mod_id_resolver_task.get(), &Flame::FileResolvingTask::succeeded, this, &PackInstallTask::onResolveModsSucceeded);
+    connect(m_mod_id_resolver_task.get(), &Flame::FileResolvingTask::failed, this, &PackInstallTask::onResolveModsFailed);
+    connect(m_mod_id_resolver_task.get(), &Flame::FileResolvingTask::aborted, this, &PackInstallTask::abort);
+    connect(m_mod_id_resolver_task.get(), &Flame::FileResolvingTask::progress, this, &PackInstallTask::setProgress);
+
+    setAbortable(true);
+
+    m_mod_id_resolver_task->start();
+}
+
+void PackInstallTask::onResolveModsSucceeded()
+{
+    auto anyBlocked = false;
+
+    Flame::Manifest results = m_mod_id_resolver_task->getResults();
+    for (int index = 0; index < m_file_id_map.size(); index++) {
+        auto const file_id = m_file_id_map.at(index);
+        if (file_id < 0)
+            continue;
+
+        Flame::File results_file = results.files[file_id];
+        VersionFile& local_file = m_version.files[index];
+
+        // First check for blocked mods
+        if (!results_file.resolved || results_file.url.isEmpty()) {
+            BlockedMod blocked_mod;
+            blocked_mod.name = local_file.name;
+            blocked_mod.websiteUrl = results_file.websiteUrl;
+            blocked_mod.hash = results_file.hash;
+            blocked_mod.matched = false;
+            blocked_mod.localPath = "";
+            blocked_mod.targetFolder = results_file.targetFolder;
+
+            m_blocked_mods.append(blocked_mod);
+
+            anyBlocked = true;
+        } else {
+            local_file.url = results_file.url.toString();
+        }
+    }
+
+    m_mod_id_resolver_task.reset();
+
+    if (anyBlocked) {
+        qDebug() << "Blocked files found, displaying file list";
+
+        BlockedModsDialog message_dialog(m_parent, tr("Blocked files found"),
+                                         tr("The following files are not available for download in third party launchers.<br/>"
+                                            "You will need to manually download them and add them to the instance."),
+                                         m_blocked_mods);
+
+        message_dialog.setModal(true);
+
+        if (message_dialog.exec() == QDialog::Accepted) {
+            qDebug() << "Post dialog blocked mods list: " << m_blocked_mods;
+            createInstance();
+        } else {
+            abort();
+        }
+
+    } else {
+        createInstance();
+    }
+}
+
+void PackInstallTask::createInstance()
+{
+    setAbortable(false);
+
+    setStatus(tr("Creating the instance..."));
+    QCoreApplication::processEvents();
+
+    auto instanceConfigPath = FS::PathCombine(m_stagingPath, "instance.cfg");
+    auto instanceSettings = std::make_shared<INISettingsObject>(instanceConfigPath);
+
+    MinecraftInstance instance(m_globalSettings, instanceSettings, m_stagingPath);
+    auto components = instance.getPackProfile();
+    components->buildingFromScratch();
+
+    for (auto target : m_version.targets) {
+        if (target.type == "game" && target.name == "minecraft") {
+            components->setComponentVersion("net.minecraft", target.version, true);
+            break;
+        }
+    }
+
+    for (auto target : m_version.targets) {
+        if (target.type != "modloader")
+            continue;
+
+        if (target.name == "forge") {
+            components->setComponentVersion("net.minecraftforge", target.version);
+        } else if (target.name == "fabric") {
+            components->setComponentVersion("net.fabricmc.fabric-loader", target.version);
+        }
+    }
+
+    // install any jar mods
+    QDir jarModsDir(FS::PathCombine(m_stagingPath, "minecraft", "jarmods"));
+    if (jarModsDir.exists()) {
+        QStringList jarMods;
+
+        for (const auto& info : jarModsDir.entryInfoList(QDir::NoDotAndDotDot | QDir::Files)) {
+            jarMods.push_back(info.absoluteFilePath());
+        }
+
+        components->installJarMods(jarMods);
+    }
+
+    components->saveNow();
+
+    instance.setName(name());
+    instance.setIconKey(m_instIcon);
+    instance.setManagedPack("modpacksch", QString::number(m_pack.id), m_pack.name, QString::number(m_version.id), m_version.name);
+
+    instance.saveNow();
+
+    onCreateInstanceSucceeded();
+}
+
+void PackInstallTask::onCreateInstanceSucceeded()
+{
+    downloadPack();
+}
+
+void PackInstallTask::downloadPack()
+{
+    setStatus(tr("Downloading mods..."));
+    setAbortable(false);
+
+    auto jobPtr = makeShared<NetJob>(tr("Mod download"), APPLICATION->network());
+    for (auto const& file : m_version.files) {
+        if (file.serverOnly || file.url.isEmpty())
+            continue;
+
+        auto path = FS::PathCombine(m_stagingPath, ".minecraft", file.path, file.name);
+        qDebug() << "Will try to download" << file.url << "to" << path;
+
+        QFileInfo file_info(file.name);
+
+        auto dl = Net::Download::makeFile(file.url, path);
+        if (!file.sha1.isEmpty()) {
+            auto rawSha1 = QByteArray::fromHex(file.sha1.toLatin1());
+            dl->addValidator(new Net::ChecksumValidator(QCryptographicHash::Sha1, rawSha1));
+        }
+
+        jobPtr->addNetAction(dl);
+    }
+
+    connect(jobPtr.get(), &NetJob::succeeded, this, &PackInstallTask::onModDownloadSucceeded);
+    connect(jobPtr.get(), &NetJob::failed, this, &PackInstallTask::onModDownloadFailed);
+    connect(jobPtr.get(), &NetJob::aborted, this, &PackInstallTask::abort);
+    connect(jobPtr.get(), &NetJob::progress, this, &PackInstallTask::setProgress);
+
+    m_net_job = jobPtr;
+
+    setAbortable(true);
+    jobPtr->start();
+}
+
+void PackInstallTask::onModDownloadSucceeded()
+{
+    m_net_job.reset();
+    if (!m_blocked_mods.isEmpty()) {
+        copyBlockedMods();
+    }
+    emitSucceeded();
+}
+
+void PackInstallTask::onManifestDownloadFailed(QString reason)
+{
+    m_net_job.reset();
+    emitFailed(reason);
+}
+void PackInstallTask::onResolveModsFailed(QString reason)
+{
+    m_net_job.reset();
+    emitFailed(reason);
+}
+void PackInstallTask::onCreateInstanceFailed(QString reason)
+{
+    emitFailed(reason);
+}
+void PackInstallTask::onModDownloadFailed(QString reason)
+{
+    m_net_job.reset();
+    emitFailed(reason);
+}
+
+/// @brief copy the matched blocked mods to the instance staging area
+void PackInstallTask::copyBlockedMods()
+{
+    setStatus(tr("Copying Blocked Mods..."));
+    setAbortable(false);
+    int i = 0;
+    int total = m_blocked_mods.length();
+    setProgress(i, total);
+    for (auto const& mod : m_blocked_mods) {
+        if (!mod.matched) {
+            qDebug() << mod.name << "was not matched to a local file, skipping copy";
+            continue;
+        }
+
+        auto dest_path = FS::PathCombine(m_stagingPath, ".minecraft", mod.targetFolder, mod.name);
+
+        setStatus(tr("Copying Blocked Mods (%1 out of %2 are done)").arg(QString::number(i), QString::number(total)));
+
+        qDebug() << "Will try to copy" << mod.localPath << "to" << dest_path;
+
+        if (!FS::copy(mod.localPath, dest_path)()) {
+            qDebug() << "Copy of" << mod.localPath << "to" << dest_path << "Failed";
+        }
+
+        i++;
+        setProgress(i, total);
+    }
+
+    setAbortable(true);
+}
+
+}  // namespace ModpacksCH

launcher/modplatform/modpacksch/FTBPackInstallTask.h

@@ -0,0 +1,101 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ *  Prism Launcher - Minecraft Launcher
+ *  Copyright (C) 2022 flowln <flowlnlnln@gmail.com>
+ *  Copyright (C) 2022 Sefa Eyeoglu <contact@scrumplex.net>
+ *
+ *  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/>.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *
+ *      Copyright 2020-2021 Jamie Mansfield <jmansfield@cadixdev.org>
+ *      Copyright 2020-2021 Petr Mrazek <peterix@gmail.com>
+ *
+ *      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 "FTBPackManifest.h"
+
+#include "InstanceTask.h"
+#include "QObjectPtr.h"
+#include "modplatform/flame/FileResolvingTask.h"
+#include "net/NetJob.h"
+#include "ui/dialogs/BlockedModsDialog.h"
+
+#include <QWidget>
+
+namespace ModpacksCH {
+
+class PackInstallTask final : public InstanceTask
+{
+    Q_OBJECT
+
+public:
+    explicit PackInstallTask(Modpack pack, QString version, QWidget* parent = nullptr);
+    ~PackInstallTask() override = default;
+
+    bool abort() override;
+
+protected:
+    void executeTask() override;
+
+private slots:
+    void onManifestDownloadSucceeded();
+    void onResolveModsSucceeded();
+    void onCreateInstanceSucceeded();
+    void onModDownloadSucceeded();
+
+    void onManifestDownloadFailed(QString reason);
+    void onResolveModsFailed(QString reason);
+    void onCreateInstanceFailed(QString reason);
+    void onModDownloadFailed(QString reason);
+
+private:
+    void resolveMods();
+    void createInstance();
+    void downloadPack();
+    void copyBlockedMods();
+
+private:
+    NetJob::Ptr m_net_job = nullptr;
+    shared_qobject_ptr<Flame::FileResolvingTask> m_mod_id_resolver_task = nullptr;
+
+    QList<int> m_file_id_map;
+
+    QByteArray m_response;
+
+    Modpack m_pack;
+    QString m_version_name;
+    Version m_version;
+
+    QMap<QString, QString> m_files_to_copy;
+    QList<BlockedMod> m_blocked_mods;
+
+    //FIXME: nuke
+    QWidget* m_parent;
+};
+
+}

launcher/modplatform/modpacksch/FTBPackManifest.cpp

@@ -0,0 +1,195 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ *  PolyMC - Minecraft Launcher
+ *  Copyright (C) 2022 Sefa Eyeoglu <contact@scrumplex.net>
+ *
+ *  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/>.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *
+ *      Copyright 2020 Jamie Mansfield <jmansfield@cadixdev.org>
+ *      Copyright 2020-2021 Petr Mrazek <peterix@gmail.com>
+ *
+ *      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.
+ */
+
+#include "FTBPackManifest.h"
+
+#include "Json.h"
+
+static void loadSpecs(ModpacksCH::Specs & s, QJsonObject & obj)
+{
+    s.id = Json::requireInteger(obj, "id");
+    s.minimum = Json::requireInteger(obj, "minimum");
+    s.recommended = Json::requireInteger(obj, "recommended");
+}
+
+static void loadTag(ModpacksCH::Tag & t, QJsonObject & obj)
+{
+    t.id = Json::requireInteger(obj, "id");
+    t.name = Json::requireString(obj, "name");
+}
+
+static void loadArt(ModpacksCH::Art & a, QJsonObject & obj)
+{
+    a.id = Json::requireInteger(obj, "id");
+    a.url = Json::requireString(obj, "url");
+    a.type = Json::requireString(obj, "type");
+    a.width = Json::requireInteger(obj, "width");
+    a.height = Json::requireInteger(obj, "height");
+    a.compressed = Json::requireBoolean(obj, "compressed");
+    a.sha1 = Json::requireString(obj, "sha1");
+    a.size = Json::requireInteger(obj, "size");
+    a.updated = Json::requireInteger(obj, "updated");
+}
+
+static void loadAuthor(ModpacksCH::Author & a, QJsonObject & obj)
+{
+    a.id = Json::requireInteger(obj, "id");
+    a.name = Json::requireString(obj, "name");
+    a.type = Json::requireString(obj, "type");
+    a.website = Json::requireString(obj, "website");
+    a.updated = Json::requireInteger(obj, "updated");
+}
+
+static void loadVersionInfo(ModpacksCH::VersionInfo & v, QJsonObject & obj)
+{
+    v.id = Json::requireInteger(obj, "id");
+    v.name = Json::requireString(obj, "name");
+    v.type = Json::requireString(obj, "type");
+    v.updated = Json::requireInteger(obj, "updated");
+    auto specs = Json::requireObject(obj, "specs");
+    loadSpecs(v.specs, specs);
+}
+
+void ModpacksCH::loadModpack(ModpacksCH::Modpack & m, QJsonObject & obj)
+{
+    m.id = Json::requireInteger(obj, "id");
+    m.name = Json::requireString(obj, "name");
+    m.synopsis = Json::requireString(obj, "synopsis");
+    m.description = Json::requireString(obj, "description");
+    m.type = Json::requireString(obj, "type");
+    m.featured = Json::requireBoolean(obj, "featured");
+    m.installs = Json::requireInteger(obj, "installs");
+    m.plays = Json::requireInteger(obj, "plays");
+    m.updated = Json::requireInteger(obj, "updated");
+    m.refreshed = Json::requireInteger(obj, "refreshed");
+    auto artArr = Json::requireArray(obj, "art");
+    for (QJsonValueRef artRaw : artArr)
+    {
+        auto artObj = Json::requireObject(artRaw);
+        ModpacksCH::Art art;
+        loadArt(art, artObj);
+        m.art.append(art);
+    }
+    auto authorArr = Json::requireArray(obj, "authors");
+    for (QJsonValueRef authorRaw : authorArr)
+    {
+        auto authorObj = Json::requireObject(authorRaw);
+        ModpacksCH::Author author;
+        loadAuthor(author, authorObj);
+        m.authors.append(author);
+    }
+    auto versionArr = Json::requireArray(obj, "versions");
+    for (QJsonValueRef versionRaw : versionArr)
+    {
+        auto versionObj = Json::requireObject(versionRaw);
+        ModpacksCH::VersionInfo version;
+        loadVersionInfo(version, versionObj);
+        m.versions.append(version);
+    }
+    auto tagArr = Json::requireArray(obj, "tags");
+    for (QJsonValueRef tagRaw : tagArr)
+    {
+        auto tagObj = Json::requireObject(tagRaw);
+        ModpacksCH::Tag tag;
+        loadTag(tag, tagObj);
+        m.tags.append(tag);
+    }
+    m.updated = Json::requireInteger(obj, "updated");
+}
+
+static void loadVersionTarget(ModpacksCH::VersionTarget & a, QJsonObject & obj)
+{
+    a.id = Json::requireInteger(obj, "id");
+    a.name = Json::requireString(obj, "name");
+    a.type = Json::requireString(obj, "type");
+    a.version = Json::requireString(obj, "version");
+    a.updated = Json::requireInteger(obj, "updated");
+}
+
+static void loadVersionFile(ModpacksCH::VersionFile & a, QJsonObject & obj)
+{
+    a.id = Json::requireInteger(obj, "id");
+    a.type = Json::requireString(obj, "type");
+    a.path = Json::requireString(obj, "path");
+    a.name = Json::requireString(obj, "name");
+    a.version = Json::requireString(obj, "version");
+    a.url = Json::ensureString(obj, "url");  // optional
+    a.sha1 = Json::requireString(obj, "sha1");
+    a.size = Json::requireInteger(obj, "size");
+    a.clientOnly = Json::requireBoolean(obj, "clientonly");
+    a.serverOnly = Json::requireBoolean(obj, "serveronly");
+    a.optional = Json::requireBoolean(obj, "optional");
+    a.updated = Json::requireInteger(obj, "updated");
+    auto curseforgeObj = Json::ensureObject(obj, "curseforge");  // optional
+    a.curseforge.project_id = Json::ensureInteger(curseforgeObj, "project");
+    a.curseforge.file_id = Json::ensureInteger(curseforgeObj, "file");
+}
+
+void ModpacksCH::loadVersion(ModpacksCH::Version & m, QJsonObject & obj)
+{
+    m.id = Json::requireInteger(obj, "id");
+    m.parent = Json::requireInteger(obj, "parent");
+    m.name = Json::requireString(obj, "name");
+    m.type = Json::requireString(obj, "type");
+    m.installs = Json::requireInteger(obj, "installs");
+    m.plays = Json::requireInteger(obj, "plays");
+    m.updated = Json::requireInteger(obj, "updated");
+    m.refreshed = Json::requireInteger(obj, "refreshed");
+    auto specs = Json::requireObject(obj, "specs");
+    loadSpecs(m.specs, specs);
+    auto targetArr = Json::requireArray(obj, "targets");
+    for (QJsonValueRef targetRaw : targetArr)
+    {
+        auto versionObj = Json::requireObject(targetRaw);
+        ModpacksCH::VersionTarget target;
+        loadVersionTarget(target, versionObj);
+        m.targets.append(target);
+    }
+    auto fileArr = Json::requireArray(obj, "files");
+    for (QJsonValueRef fileRaw : fileArr)
+    {
+        auto fileObj = Json::requireObject(fileRaw);
+        ModpacksCH::VersionFile file;
+        loadVersionFile(file, fileObj);
+        m.files.append(file);
+    }
+}
+
+//static void loadVersionChangelog(ModpacksCH::VersionChangelog & m, QJsonObject & obj)
+//{
+//    m.content = Json::requireString(obj, "content");
+//    m.updated = Json::requireInteger(obj, "updated");
+//}

launcher/modplatform/modpacksch/FTBPackManifest.h

@@ -0,0 +1,168 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ *  PolyMC - Minecraft Launcher
+ *  Copyright (C) 2022 Sefa Eyeoglu <contact@scrumplex.net>
+ *
+ *  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/>.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *
+ *      Copyright 2020-2021 Jamie Mansfield <jmansfield@cadixdev.org>
+ *      Copyright 2020 Petr Mrazek <peterix@gmail.com>
+ *
+ *      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 <QString>
+#include <QVector>
+#include <QUrl>
+#include <QJsonObject>
+#include <QMetaType>
+
+namespace ModpacksCH
+{
+
+struct Specs
+{
+    int id;
+    int minimum;
+    int recommended;
+};
+
+struct Tag
+{
+    int id;
+    QString name;
+};
+
+struct Art
+{
+    int id;
+    QString url;
+    QString type;
+    int width;
+    int height;
+    bool compressed;
+    QString sha1;
+    int size;
+    int64_t updated;
+};
+
+struct Author
+{
+    int id;
+    QString name;
+    QString type;
+    QString website;
+    int64_t updated;
+};
+
+struct VersionInfo
+{
+    int id;
+    QString name;
+    QString type;
+    int64_t updated;
+    Specs specs;
+};
+
+struct Modpack
+{
+    int id;
+    QString name;
+    QString synopsis;
+    QString description;
+    QString type;
+    bool featured;
+    int installs;
+    int plays;
+    int64_t updated;
+    int64_t refreshed;
+    QVector<Art> art;
+    QVector<Author> authors;
+    QVector<VersionInfo> versions;
+    QVector<Tag> tags;
+};
+
+struct VersionTarget
+{
+    int id;
+    QString type;
+    QString name;
+    QString version;
+    int64_t updated;
+};
+
+struct VersionFileCurseForge
+{
+    int project_id;
+    int file_id;
+};
+
+struct VersionFile
+{
+    int id;
+    QString type;
+    QString path;
+    QString name;
+    QString version;
+    QString url;
+    QString sha1;
+    int size;
+    bool clientOnly;
+    bool serverOnly;
+    bool optional;
+    int64_t updated;
+    VersionFileCurseForge curseforge;
+};
+
+struct Version
+{
+    int id;
+    int parent;
+    QString name;
+    QString type;
+    int installs;
+    int plays;
+    int64_t updated;
+    int64_t refreshed;
+    Specs specs;
+    QVector<VersionTarget> targets;
+    QVector<VersionFile> files;
+};
+
+struct VersionChangelog
+{
+    QString content;
+    int64_t updated;
+};
+
+void loadModpack(Modpack & m, QJsonObject & obj);
+
+void loadVersion(Version & m, QJsonObject & obj);
+}
+
+Q_DECLARE_METATYPE(ModpacksCH::Modpack)

launcher/ui/dialogs/NewInstanceDialog.cpp

@@ -56,6 +56,7 @@
 #include "ui/widgets/PageContainer.h"
 #include "ui/pages/modplatform/VanillaPage.h"
 #include "ui/pages/modplatform/atlauncher/AtlPage.h"
+#include "ui/pages/modplatform/ftb/FtbPage.h"
 #include "ui/pages/modplatform/legacy_ftb/Page.h"
 #include "ui/pages/modplatform/flame/FlamePage.h"
 #include "ui/pages/modplatform/ImportPage.h"
@@ -167,6 +168,7 @@ QList<BasePage *> NewInstanceDialog::getPages()
     pages.append(new AtlPage(this));
     if (APPLICATION->capabilities() & Application::SupportsFlame)
         pages.append(new FlamePage(this));
+    pages.append(new FtbPage(this));
     pages.append(new LegacyFTB::Page(this));
     pages.append(new ModrinthPage(this));
     pages.append(new TechnicPage(this));

launcher/ui/pages/modplatform/ftb/FtbFilterModel.cpp

@@ -0,0 +1,93 @@
+/*
+ * Copyright 2020-2021 Jamie Mansfield <jmansfield@cadixdev.org>
+ *
+ * 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.
+ */
+
+#include "FtbFilterModel.h"
+
+#include <QDebug>
+
+#include "modplatform/modpacksch/FTBPackManifest.h"
+
+#include "StringUtils.h"
+
+namespace Ftb {
+
+FilterModel::FilterModel(QObject *parent) : QSortFilterProxyModel(parent)
+{
+    currentSorting = Sorting::ByPlays;
+    sortings.insert(tr("Sort by Plays"), Sorting::ByPlays);
+    sortings.insert(tr("Sort by Installs"), Sorting::ByInstalls);
+    sortings.insert(tr("Sort by Name"), Sorting::ByName);
+}
+
+const QMap<QString, FilterModel::Sorting> FilterModel::getAvailableSortings()
+{
+    return sortings;
+}
+
+QString FilterModel::translateCurrentSorting()
+{
+    return sortings.key(currentSorting);
+}
+
+void FilterModel::setSorting(Sorting sorting)
+{
+    currentSorting = sorting;
+    invalidate();
+}
+
+FilterModel::Sorting FilterModel::getCurrentSorting()
+{
+    return currentSorting;
+}
+
+void FilterModel::setSearchTerm(const QString& term)
+{
+    searchTerm = term.trimmed();
+    invalidate();
+}
+
+bool FilterModel::filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent) const
+{
+    if (searchTerm.isEmpty()) {
+        return true;
+    }
+
+    auto index = sourceModel()->index(sourceRow, 0, sourceParent);
+    auto pack = sourceModel()->data(index, Qt::UserRole).value<ModpacksCH::Modpack>();
+    return pack.name.contains(searchTerm, Qt::CaseInsensitive);
+}
+
+bool FilterModel::lessThan(const QModelIndex &left, const QModelIndex &right) const
+{
+    ModpacksCH::Modpack leftPack = sourceModel()->data(left, Qt::UserRole).value<ModpacksCH::Modpack>();
+    ModpacksCH::Modpack rightPack = sourceModel()->data(right, Qt::UserRole).value<ModpacksCH::Modpack>();
+
+    if (currentSorting == ByPlays) {
+        return leftPack.plays < rightPack.plays;
+    }
+    else if (currentSorting == ByInstalls) {
+        return leftPack.installs < rightPack.installs;
+    }
+    else if (currentSorting == ByName) {
+        return StringUtils::naturalCompare(leftPack.name, rightPack.name, Qt::CaseSensitive) >= 0;
+    }
+
+    // Invalid sorting set, somehow...
+    qWarning() << "Invalid sorting set!";
+    return true;
+}
+
+}

launcher/ui/pages/modplatform/ftb/FtbFilterModel.h

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2020-2021 Jamie Mansfield <jmansfield@cadixdev.org>
+ *
+ * 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 <QtCore/QSortFilterProxyModel>
+
+namespace Ftb {
+
+class FilterModel : public QSortFilterProxyModel
+{
+    Q_OBJECT
+
+public:
+    FilterModel(QObject* parent = Q_NULLPTR);
+    enum Sorting {
+        ByPlays,
+        ByInstalls,
+        ByName,
+    };
+    const QMap<QString, Sorting> getAvailableSortings();
+    QString translateCurrentSorting();
+    void setSorting(Sorting sorting);
+    Sorting getCurrentSorting();
+    void setSearchTerm(const QString& term);
+
+protected:
+    bool filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent) const override;
+    bool lessThan(const QModelIndex &left, const QModelIndex &right) const override;
+
+private:
+    QMap<QString, Sorting> sortings;
+    Sorting currentSorting;
+    QString searchTerm { "" };
+
+};
+
+}

launcher/ui/pages/modplatform/ftb/FtbListModel.cpp

@@ -0,0 +1,304 @@
+/*
+ * Copyright 2020-2021 Jamie Mansfield <jmansfield@cadixdev.org>
+ *
+ * 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.
+ */
+
+#include "FtbListModel.h"
+
+#include "BuildConfig.h"
+#include "Application.h"
+#include "Json.h"
+
+#include <QPainter>
+
+namespace Ftb {
+
+ListModel::ListModel(QObject *parent) : QAbstractListModel(parent)
+{
+}
+
+ListModel::~ListModel()
+{
+}
+
+int ListModel::rowCount(const QModelIndex &parent) const
+{
+    return parent.isValid() ? 0 : modpacks.size();
+}
+
+int ListModel::columnCount(const QModelIndex &parent) const
+{
+    return parent.isValid() ? 0 : 1;
+}
+
+QVariant ListModel::data(const QModelIndex &index, int role) const
+{
+    int pos = index.row();
+    if(pos >= modpacks.size() || pos < 0 || !index.isValid())
+    {
+        return QString("INVALID INDEX %1").arg(pos);
+    }
+
+    ModpacksCH::Modpack pack = modpacks.at(pos);
+    if(role == Qt::DisplayRole)
+    {
+        return pack.name;
+    }
+    else if (role == Qt::ToolTipRole)
+    {
+        return pack.synopsis;
+    }
+    else if(role == Qt::DecorationRole)
+    {
+        QIcon placeholder = APPLICATION->getThemedIcon("screenshot-placeholder");
+
+        auto iter = m_logoMap.find(pack.name);
+        if (iter != m_logoMap.end()) {
+            auto & logo = *iter;
+            if(!logo.result.isNull()) {
+                return logo.result;
+            }
+            return placeholder;
+        }
+
+        for(auto art : pack.art) {
+            if(art.type == "square") {
+                ((ListModel *)this)->requestLogo(pack.name, art.url);
+            }
+        }
+        return placeholder;
+    }
+    else if(role == Qt::UserRole)
+    {
+        QVariant v;
+        v.setValue(pack);
+        return v;
+    }
+
+    return QVariant();
+}
+
+void ListModel::getLogo(const QString &logo, const QString &logoUrl, LogoCallback callback)
+{
+    if(m_logoMap.contains(logo))
+    {
+        callback(APPLICATION->metacache()->resolveEntry("ModpacksCHPacks", QString("logos/%1").arg(logo.section(".", 0, 0)))->getFullPath());
+    }
+    else
+    {
+        requestLogo(logo, logoUrl);
+    }
+}
+
+void ListModel::request()
+{
+    m_aborted = false;
+
+    beginResetModel();
+    modpacks.clear();
+    endResetModel();
+
+    auto netJob = makeShared<NetJob>("Ftb::Request", APPLICATION->network());
+    auto url = QString(BuildConfig.MODPACKSCH_API_BASE_URL + "public/modpack/all");
+    netJob->addNetAction(Net::Download::makeByteArray(QUrl(url), &response));
+    jobPtr = netJob;
+    jobPtr->start();
+
+    QObject::connect(netJob.get(), &NetJob::succeeded, this, &ListModel::requestFinished);
+    QObject::connect(netJob.get(), &NetJob::failed, this, &ListModel::requestFailed);
+}
+
+void ListModel::abortRequest()
+{
+    m_aborted = jobPtr->abort();
+    jobPtr.reset();
+}
+
+void ListModel::requestFinished()
+{
+    jobPtr.reset();
+    remainingPacks.clear();
+
+    QJsonParseError parse_error {};
+    QJsonDocument doc = QJsonDocument::fromJson(response, &parse_error);
+    if(parse_error.error != QJsonParseError::NoError) {
+        qWarning() << "Error while parsing JSON response from ModpacksCH at " << parse_error.offset << " reason: " << parse_error.errorString();
+        qWarning() << response;
+        return;
+    }
+
+    auto packs = doc.object().value("packs").toArray();
+    for(auto pack : packs) {
+        auto packId = pack.toInt();
+        remainingPacks.append(packId);
+    }
+
+    if(!remainingPacks.isEmpty()) {
+        currentPack = remainingPacks.at(0);
+        requestPack();
+    }
+}
+
+void ListModel::requestFailed(QString reason)
+{
+    jobPtr.reset();
+    remainingPacks.clear();
+}
+
+void ListModel::requestPack()
+{
+    auto netJob = makeShared<NetJob>("Ftb::Search", APPLICATION->network());
+    auto searchUrl = QString(BuildConfig.MODPACKSCH_API_BASE_URL + "public/modpack/%1").arg(currentPack);
+    netJob->addNetAction(Net::Download::makeByteArray(QUrl(searchUrl), &response));
+    jobPtr = netJob;
+    jobPtr->start();
+
+    QObject::connect(netJob.get(), &NetJob::succeeded, this, &ListModel::packRequestFinished);
+    QObject::connect(netJob.get(), &NetJob::failed, this, &ListModel::packRequestFailed);
+}
+
+void ListModel::packRequestFinished()
+{
+    if (!jobPtr || m_aborted)
+        return;
+
+    jobPtr.reset();
+    remainingPacks.removeOne(currentPack);
+
+    QJsonParseError parse_error;
+    QJsonDocument doc = QJsonDocument::fromJson(response, &parse_error);
+
+    if(parse_error.error != QJsonParseError::NoError) {
+        qWarning() << "Error while parsing JSON response from ModpacksCH at " << parse_error.offset << " reason: " << parse_error.errorString();
+        qWarning() << response;
+        return;
+    }
+
+    auto obj = doc.object();
+
+    ModpacksCH::Modpack pack;
+    try
+    {
+        ModpacksCH::loadModpack(pack, obj);
+    }
+    catch (const JSONValidationError &e)
+    {
+        qDebug() << QString::fromUtf8(response);
+        qWarning() << "Error while reading pack manifest from ModpacksCH: " << e.cause();
+        return;
+    }
+
+    // Since there is no guarantee that packs have a version, this will just
+    // ignore those "dud" packs.
+    if (pack.versions.empty())
+    {
+        qWarning() << "ModpacksCH Pack " << pack.id << " ignored. reason: lacking any versions";
+    }
+    else
+    {
+        beginInsertRows(QModelIndex(), modpacks.size(), modpacks.size());
+        modpacks.append(pack);
+        endInsertRows();
+    }
+
+    if(!remainingPacks.isEmpty()) {
+        currentPack = remainingPacks.at(0);
+        requestPack();
+    }
+}
+
+void ListModel::packRequestFailed(QString reason)
+{
+    jobPtr.reset();
+    remainingPacks.removeOne(currentPack);
+}
+
+void ListModel::logoLoaded(QString logo, bool stale)
+{
+    auto & logoObj = m_logoMap[logo];
+    logoObj.downloadJob.reset();
+    QString smallPath = logoObj.fullpath + ".small";
+
+    QFileInfo smallInfo(smallPath);
+
+    if(stale || !smallInfo.exists()) {
+        QImage image(logoObj.fullpath);
+        if (image.isNull())
+        {
+            logoObj.failed = true;
+            return;
+        }
+        QImage small;
+        if (image.width() > image.height()) {
+            small = image.scaledToWidth(512).scaledToWidth(256, Qt::SmoothTransformation);
+        }
+        else {
+            small = image.scaledToHeight(512).scaledToHeight(256, Qt::SmoothTransformation);
+        }
+        QPoint offset((256 - small.width()) / 2, (256 - small.height()) / 2);
+        QImage square(QSize(256, 256), QImage::Format_ARGB32);
+        square.fill(Qt::transparent);
+
+        QPainter painter(&square);
+        painter.drawImage(offset, small);
+        painter.end();
+
+        square.save(logoObj.fullpath + ".small", "PNG");
+    }
+
+    logoObj.result = QIcon(logoObj.fullpath + ".small");
+    for(int i = 0; i < modpacks.size(); i++) {
+        if(modpacks[i].name == logo) {
+            emit dataChanged(createIndex(i, 0), createIndex(i, 0), {Qt::DecorationRole});
+        }
+    }
+}
+
+void ListModel::logoFailed(QString logo)
+{
+    m_logoMap[logo].failed = true;
+    m_logoMap[logo].downloadJob.reset();
+}
+
+void ListModel::requestLogo(QString logo, QString url)
+{
+    if(m_logoMap.contains(logo)) {
+        return;
+    }
+
+    MetaEntryPtr entry = APPLICATION->metacache()->resolveEntry("ModpacksCHPacks", QString("logos/%1").arg(logo.section(".", 0, 0)));
+
+    bool stale = entry->isStale();
+
+    auto job = makeShared<NetJob>(QString("ModpacksCH Icon Download %1").arg(logo), APPLICATION->network());
+    job->addNetAction(Net::Download::makeCached(QUrl(url), entry));
+
+    auto fullPath = entry->getFullPath();
+    QObject::connect(job.get(), &NetJob::finished, this, [this, logo, fullPath, stale]
+    {
+        logoLoaded(logo, stale);
+    });
+
+    QObject::connect(job.get(), &NetJob::failed, this, [this, logo]
+    {
+        logoFailed(logo);
+    });
+
+    auto &newLogoEntry = m_logoMap[logo];
+    newLogoEntry.downloadJob = job;
+    newLogoEntry.fullpath = fullPath;
+    job->start();
+}
+
+}

launcher/ui/pages/modplatform/ftb/FtbListModel.h

@@ -0,0 +1,83 @@
+/*
+ * Copyright 2020-2021 Jamie Mansfield <jmansfield@cadixdev.org>
+ *
+ * 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 <QAbstractListModel>
+
+#include "modplatform/modpacksch/FTBPackManifest.h"
+#include "net/NetJob.h"
+#include <QIcon>
+
+namespace Ftb {
+
+struct Logo {
+    QString fullpath;
+    NetJob::Ptr downloadJob;
+    QIcon result;
+    bool failed = false;
+};
+
+typedef QMap<QString, Logo> LogoMap;
+typedef std::function<void(QString)> LogoCallback;
+
+class ListModel : public QAbstractListModel
+{
+    Q_OBJECT
+
+public:
+    ListModel(QObject *parent);
+    virtual ~ListModel();
+
+    int rowCount(const QModelIndex &parent) const override;
+    int columnCount(const QModelIndex &parent) const override;
+    QVariant data(const QModelIndex &index, int role) const override;
+
+    void request();
+    void abortRequest();
+
+    void getLogo(const QString &logo, const QString &logoUrl, LogoCallback callback);
+
+    [[nodiscard]] bool isMakingRequest() const { return jobPtr.get(); }
+    [[nodiscard]] bool wasAborted() const { return m_aborted; }
+
+private slots:
+    void requestFinished();
+    void requestFailed(QString reason);
+
+    void requestPack();
+    void packRequestFinished();
+    void packRequestFailed(QString reason);
+
+    void logoFailed(QString logo);
+    void logoLoaded(QString logo, bool stale);
+
+private:
+    void requestLogo(QString file, QString url);
+
+private:
+    bool m_aborted = false;
+
+    QList<ModpacksCH::Modpack> modpacks;
+    LogoMap m_logoMap;
+
+    NetJob::Ptr jobPtr;
+    int currentPack;
+    QList<int> remainingPacks;
+    QByteArray response;
+};
+
+}

launcher/ui/pages/modplatform/ftb/FtbPage.cpp

@@ -0,0 +1,199 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ *  PolyMC - Minecraft Launcher
+ *  Copyright (c) 2022 Jamie Mansfield <jmansfield@cadixdev.org>
+ *  Copyright (C) 2022 Sefa Eyeoglu <contact@scrumplex.net>
+ *
+ *  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/>.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *
+ *      Copyright 2020-2021 Jamie Mansfield <jmansfield@cadixdev.org>
+ *      Copyright 2021 Philip T <me@phit.link>
+ *
+ *      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.
+ */
+
+#include "FtbPage.h"
+#include "ui_FtbPage.h"
+
+#include <QKeyEvent>
+
+#include "ui/dialogs/NewInstanceDialog.h"
+#include "modplatform/modpacksch/FTBPackInstallTask.h"
+
+#include "Markdown.h"
+
+FtbPage::FtbPage(NewInstanceDialog* dialog, QWidget *parent)
+        : QWidget(parent), ui(new Ui::FtbPage), dialog(dialog)
+{
+    ui->setupUi(this);
+
+    filterModel = new Ftb::FilterModel(this);
+    listModel = new Ftb::ListModel(this);
+    filterModel->setSourceModel(listModel);
+    ui->packView->setModel(filterModel);
+    ui->packView->setSortingEnabled(true);
+    ui->packView->header()->hide();
+    ui->packView->setIndentation(0);
+
+    ui->searchEdit->installEventFilter(this);
+
+    ui->versionSelectionBox->view()->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
+    ui->versionSelectionBox->view()->parentWidget()->setMaximumHeight(300);
+
+    for(int i = 0; i < filterModel->getAvailableSortings().size(); i++)
+    {
+        ui->sortByBox->addItem(filterModel->getAvailableSortings().keys().at(i));
+    }
+    ui->sortByBox->setCurrentText(filterModel->translateCurrentSorting());
+
+    connect(ui->searchEdit, &QLineEdit::textChanged, this, &FtbPage::triggerSearch);
+    connect(ui->sortByBox, &QComboBox::currentTextChanged, this, &FtbPage::onSortingSelectionChanged);
+    connect(ui->packView->selectionModel(), &QItemSelectionModel::currentChanged, this, &FtbPage::onSelectionChanged);
+    connect(ui->versionSelectionBox, &QComboBox::currentTextChanged, this, &FtbPage::onVersionSelectionChanged);
+
+    ui->packDescription->setMetaEntry("FTBPacks");
+}
+
+FtbPage::~FtbPage()
+{
+    delete ui;
+}
+
+bool FtbPage::eventFilter(QObject* watched, QEvent* event)
+{
+    if (watched == ui->searchEdit && event->type() == QEvent::KeyPress) {
+        QKeyEvent* keyEvent = static_cast<QKeyEvent*>(event);
+        if (keyEvent->key() == Qt::Key_Return) {
+            triggerSearch();
+            keyEvent->accept();
+            return true;
+        }
+    }
+    return QWidget::eventFilter(watched, event);
+}
+
+bool FtbPage::shouldDisplay() const
+{
+    return true;
+}
+
+void FtbPage::retranslate()
+{
+    ui->retranslateUi(this);
+}
+
+void FtbPage::openedImpl()
+{
+    if(!initialised || listModel->wasAborted())
+    {
+        listModel->request();
+        initialised = true;
+    }
+
+    suggestCurrent();
+}
+
+void FtbPage::closedImpl()
+{
+    if (listModel->isMakingRequest())
+        listModel->abortRequest();
+}
+
+void FtbPage::suggestCurrent()
+{
+    if(!isOpened)
+    {
+        return;
+    }
+
+    if (selectedVersion.isEmpty())
+    {
+        dialog->setSuggestedPack();
+        return;
+    }
+
+    dialog->setSuggestedPack(selected.name, selectedVersion, new ModpacksCH::PackInstallTask(selected, selectedVersion, this));
+    for(auto art : selected.art) {
+        if(art.type == "square") {
+            QString editedLogoName;
+            editedLogoName = selected.name;
+
+            listModel->getLogo(selected.name, art.url, [this, editedLogoName](QString logo)
+            {
+                dialog->setSuggestedIconFromFile(logo + ".small", editedLogoName);
+            });
+        }
+    }
+}
+
+void FtbPage::triggerSearch()
+{
+    filterModel->setSearchTerm(ui->searchEdit->text());
+}
+
+void FtbPage::onSortingSelectionChanged(QString data)
+{
+    auto toSet = filterModel->getAvailableSortings().value(data);
+    filterModel->setSorting(toSet);
+}
+
+void FtbPage::onSelectionChanged(QModelIndex first, QModelIndex second)
+{
+    ui->versionSelectionBox->clear();
+
+    if(!first.isValid())
+    {
+        if(isOpened)
+        {
+            dialog->setSuggestedPack();
+        }
+        return;
+    }
+
+    selected = filterModel->data(first, Qt::UserRole).value<ModpacksCH::Modpack>();
+
+    QString output = markdownToHTML(selected.description.toUtf8());
+    ui->packDescription->setHtml(output);
+
+    // reverse foreach, so that the newest versions are first
+    for (auto i = selected.versions.size(); i--;) {
+        ui->versionSelectionBox->addItem(selected.versions.at(i).name);
+    }
+
+    suggestCurrent();
+}
+
+void FtbPage::onVersionSelectionChanged(QString data)
+{
+    if(data.isNull() || data.isEmpty())
+    {
+        selectedVersion = "";
+        return;
+    }
+
+    selectedVersion = data;
+    suggestCurrent();
+}

launcher/ui/pages/modplatform/ftb/FtbPage.h

@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ *  PolyMC - Minecraft Launcher
+ *  Copyright (c) 2022 Jamie Mansfield <jmansfield@cadixdev.org>
+ *
+ *  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/>.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *
+ *      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 "FtbFilterModel.h"
+#include "FtbListModel.h"
+
+#include <QWidget>
+
+#include "Application.h"
+#include "ui/pages/BasePage.h"
+#include "tasks/Task.h"
+
+namespace Ui
+{
+    class FtbPage;
+}
+
+class NewInstanceDialog;
+
+class FtbPage : public QWidget, public BasePage
+{
+Q_OBJECT
+
+public:
+    explicit FtbPage(NewInstanceDialog* dialog, QWidget *parent = 0);
+    virtual ~FtbPage();
+    virtual QString displayName() const override
+    {
+        return "FTB";
+    }
+    virtual QIcon icon() const override
+    {
+        return APPLICATION->getThemedIcon("ftb_logo");
+    }
+    virtual QString id() const override
+    {
+        return "ftb";
+    }
+    virtual QString helpPage() const override
+    {
+        return "FTB-platform";
+    }
+    virtual bool shouldDisplay() const override;
+    void retranslate() override;
+
+    void openedImpl() override;
+    void closedImpl() override;
+
+    bool eventFilter(QObject * watched, QEvent * event) override;
+
+private:
+    void suggestCurrent();
+
+private slots:
+    void triggerSearch();
+
+    void onSortingSelectionChanged(QString data);
+    void onSelectionChanged(QModelIndex first, QModelIndex second);
+    void onVersionSelectionChanged(QString data);
+
+private:
+    Ui::FtbPage *ui = nullptr;
+    NewInstanceDialog* dialog = nullptr;
+    Ftb::ListModel* listModel = nullptr;
+    Ftb::FilterModel* filterModel = nullptr;
+
+    ModpacksCH::Modpack selected;
+    QString selectedVersion;
+
+    bool initialised { false };
+};

launcher/ui/pages/modplatform/ftb/FtbPage.ui

@@ -0,0 +1,86 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>FtbPage</class>
+ <widget class="QWidget" name="FtbPage">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>875</width>
+    <height>745</height>
+   </rect>
+  </property>
+  <layout class="QGridLayout" name="gridLayout">
+   <item row="2" column="0" colspan="2">
+    <layout class="QGridLayout" name="gridLayout_4" columnstretch="0,0,0" rowminimumheight="0" columnminimumwidth="0,0,0">
+     <item row="0" column="2">
+      <widget class="QComboBox" name="versionSelectionBox"/>
+     </item>
+     <item row="0" column="1">
+      <widget class="QLabel" name="label">
+       <property name="text">
+        <string>Version selected:</string>
+       </property>
+       <property name="alignment">
+        <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+       </property>
+      </widget>
+     </item>
+     <item row="0" column="0">
+      <widget class="QComboBox" name="sortByBox"/>
+     </item>
+    </layout>
+   </item>
+   <item row="0" column="0">
+    <widget class="QLineEdit" name="searchEdit">
+     <property name="placeholderText">
+      <string>Search and filter...</string>
+     </property>
+     <property name="clearButtonEnabled">
+      <bool>true</bool>
+     </property>
+    </widget>
+   </item>
+   <item row="1" column="0" colspan="2">
+    <layout class="QGridLayout" name="gridLayout_3">
+     <item row="0" column="0">
+      <widget class="QTreeView" name="packView">
+       <property name="alternatingRowColors">
+        <bool>true</bool>
+       </property>
+       <property name="iconSize">
+        <size>
+         <width>48</width>
+         <height>48</height>
+        </size>
+       </property>
+      </widget>
+     </item>
+     <item row="0" column="1">
+      <widget class="ProjectDescriptionPage" name="packDescription">
+       <property name="openExternalLinks">
+        <bool>true</bool>
+       </property>
+       <property name="openLinks">
+        <bool>true</bool>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+  </layout>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>ProjectDescriptionPage</class>
+   <extends>QTextBrowser</extends>
+   <header>ui/widgets/ProjectDescriptionPage.h</header>
+  </customwidget>
+ </customwidgets>
+ <tabstops>
+  <tabstop>searchEdit</tabstop>
+  <tabstop>versionSelectionBox</tabstop>
+ </tabstops>
+ <resources/>
+ <connections/>
+</ui>