feat: add mod index updating to ModDownloadTask

This makes ModDownloadTask into a SequentialTask with 2 subtasks:
Downloading the mod files and updating the index with the new
information.

The index updating is done first so that, in the future, we
can prompt the user before download if, for instance, we discover
there's another version already installed.

3 files changed, 25 insertions, 28 deletions

diff --git a/launcher/ModDownloadTask.cpp b/launcher/ModDownloadTask.cpp
index 08a02d29..e5766435 100644
--- a/launcher/ModDownloadTask.cpp
+++ b/launcher/ModDownloadTask.cpp
@@ -1,24 +1,28 @@
 #include "ModDownloadTask.h"
 #include "Application.h"
+#include "minecraft/mod/LocalModUpdateTask.h"
 
-ModDownloadTask::ModDownloadTask(const QUrl sourceUrl,const QString filename, const std::shared_ptr<ModFolderModel> mods)
-: m_sourceUrl(sourceUrl), mods(mods), filename(filename) {
-}
+ModDownloadTask::ModDownloadTask(ModPlatform::IndexedPack mod, ModPlatform::IndexedVersion version, const std::shared_ptr<ModFolderModel> mods)
+    : m_mod(mod), m_mod_version(version), mods(mods)
+{
+    m_update_task.reset(new LocalModUpdateTask(mods->dir(), m_mod, m_mod_version));
 
-void ModDownloadTask::executeTask() {
-    setStatus(tr("Downloading mod:\n%1").arg(m_sourceUrl.toString()));
+    addTask(m_update_task);
 
     m_filesNetJob.reset(new NetJob(tr("Mod download"), APPLICATION->network()));
-    m_filesNetJob->addNetAction(Net::Download::makeFile(m_sourceUrl, mods->dir().absoluteFilePath(filename)));
+    m_filesNetJob->setStatus(tr("Downloading mod:\n%1").arg(m_mod_version.downloadUrl));
+    
+    m_filesNetJob->addNetAction(Net::Download::makeFile(m_mod_version.downloadUrl, mods->dir().absoluteFilePath(getFilename())));
     connect(m_filesNetJob.get(), &NetJob::succeeded, this, &ModDownloadTask::downloadSucceeded);
     connect(m_filesNetJob.get(), &NetJob::progress, this, &ModDownloadTask::downloadProgressChanged);
     connect(m_filesNetJob.get(), &NetJob::failed, this, &ModDownloadTask::downloadFailed);
-    m_filesNetJob->start();
+
+    addTask(m_filesNetJob);
+
 }
 
 void ModDownloadTask::downloadSucceeded()
 {
-    emitSucceeded();
     m_filesNetJob.reset();
 }
 
@@ -32,8 +36,3 @@ void ModDownloadTask::downloadProgressChanged(qint64 current, qint64 total)
 {
     emit progress(current, total);
 }
-
-bool ModDownloadTask::abort() {
-    return m_filesNetJob->abort();
-}
-
diff --git a/launcher/ModDownloadTask.h b/launcher/ModDownloadTask.h
index ddada5a2..d292dfbb 100644
--- a/launcher/ModDownloadTask.h
+++ b/launcher/ModDownloadTask.h
@@ -1,28 +1,26 @@
 #pragma once
+
 #include "QObjectPtr.h"
-#include "tasks/Task.h"
+#include "minecraft/mod/LocalModUpdateTask.h"
+#include "modplatform/ModIndex.h"
+#include "tasks/SequentialTask.h"
 #include "minecraft/mod/ModFolderModel.h"
 #include "net/NetJob.h"
 #include <QUrl>
 
-
-class ModDownloadTask : public Task {
+class ModDownloadTask : public SequentialTask {
     Q_OBJECT
 public:
-    explicit ModDownloadTask(const QUrl sourceUrl, const QString filename, const std::shared_ptr<ModFolderModel> mods);
-    const QString& getFilename() const { return filename; }
-
-public slots:
-    bool abort() override;
-protected:
-    //! Entry point for tasks.
-    void executeTask() override;
+    explicit ModDownloadTask(ModPlatform::IndexedPack mod, ModPlatform::IndexedVersion version, const std::shared_ptr<ModFolderModel> mods);
+    const QString& getFilename() const { return m_mod_version.fileName; }
 
 private:
-    QUrl m_sourceUrl;
-    NetJob::Ptr m_filesNetJob;
+    ModPlatform::IndexedPack m_mod;
+    ModPlatform::IndexedVersion m_mod_version;
     const std::shared_ptr<ModFolderModel> mods;
-    const QString filename;
+
+    NetJob::Ptr m_filesNetJob;
+    LocalModUpdateTask::Ptr m_update_task;
 
     void downloadProgressChanged(qint64 current, qint64 total);
 
diff --git a/launcher/ui/pages/modplatform/ModPage.cpp b/launcher/ui/pages/modplatform/ModPage.cpp
index ad36cf2f..5020d44c 100644
--- a/launcher/ui/pages/modplatform/ModPage.cpp
+++ b/launcher/ui/pages/modplatform/ModPage.cpp
@@ -150,7 +150,7 @@ void ModPage::onModSelected()
     if (dialog->isModSelected(current.name, version.fileName)) {
         dialog->removeSelectedMod(current.name);
     } else {
-        dialog->addSelectedMod(current.name, new ModDownloadTask(version.downloadUrl, version.fileName, dialog->mods));
+        dialog->addSelectedMod(current.name, new ModDownloadTask(current, version, dialog->mods));
     }
 
     updateSelectionButton();