GH-1949 Allow Technic pack downloads to be aborted

This supports both 'single zip' modpacks and Solder packs, through the
Technic mod platform page.

api/logic/modplatform/technic/SingleZipPackInstallTask.cpp

@@ -28,6 +28,14 @@ Technic::SingleZipPackInstallTask::SingleZipPackInstallTask(const QUrl &sourceUr
     m_minecraftVersion = minecraftVersion;
 }
 
+bool Technic::SingleZipPackInstallTask::abort() {
+    if(m_abortable)
+    {
+        return m_filesNetJob->abort();
+    }
+    return false;
+}
+
 void Technic::SingleZipPackInstallTask::executeTask()
 {
     setStatus(tr("Downloading modpack:\n%1").arg(m_sourceUrl.toString()));
@@ -47,6 +55,8 @@ void Technic::SingleZipPackInstallTask::executeTask()
 
 void Technic::SingleZipPackInstallTask::downloadSucceeded()
 {
+    m_abortable = false;
+
     setStatus(tr("Extracting modpack"));
     QDir extractDir(FS::PathCombine(m_stagingPath, ".minecraft"));
     qDebug() << "Attempting to create instance from" << m_archivePath;
@@ -67,12 +77,14 @@ void Technic::SingleZipPackInstallTask::downloadSucceeded()
 
 void Technic::SingleZipPackInstallTask::downloadFailed(QString reason)
 {
+    m_abortable = false;
     emitFailed(reason);
     m_filesNetJob.reset();
 }
 
 void Technic::SingleZipPackInstallTask::downloadProgressChanged(qint64 current, qint64 total)
 {
+    m_abortable = true;
     setProgress(current / 2, total);
 }
 

api/logic/modplatform/technic/SingleZipPackInstallTask.h

@@ -36,6 +36,9 @@ class MULTIMC_LOGIC_EXPORT SingleZipPackInstallTask : public InstanceTask
 public:
     SingleZipPackInstallTask(const QUrl &sourceUrl, const QString &minecraftVersion);
 
+    bool canAbort() const override { return true; }
+    bool abort() override;
+
 protected:
     void executeTask() override;
 
@@ -48,6 +51,8 @@ private slots:
     void extractAborted();
 
 private:
+    bool m_abortable = false;
+
     QUrl m_sourceUrl;
     QString m_minecraftVersion;
     QString m_archivePath;

api/logic/modplatform/technic/SolderPackInstallTask.cpp

@@ -27,6 +27,14 @@ Technic::SolderPackInstallTask::SolderPackInstallTask(const QUrl &sourceUrl, con
     m_minecraftVersion = minecraftVersion;
 }
 
+bool Technic::SolderPackInstallTask::abort() {
+    if(m_abortable)
+    {
+        return m_filesNetJob->abort();
+    }
+    return false;
+}
+
 void Technic::SolderPackInstallTask::executeTask()
 {
     setStatus(tr("Finding recommended version:\n%1").arg(m_sourceUrl.toString()));
@@ -106,6 +114,8 @@ void Technic::SolderPackInstallTask::fileListSucceeded()
 
 void Technic::SolderPackInstallTask::downloadSucceeded()
 {
+    m_abortable = false;
+
     setStatus(tr("Extracting modpack"));
     m_filesNetJob.reset();
     m_extractFuture = QtConcurrent::run([this]()
@@ -132,12 +142,14 @@ void Technic::SolderPackInstallTask::downloadSucceeded()
 
 void Technic::SolderPackInstallTask::downloadFailed(QString reason)
 {
+    m_abortable = false;
     emitFailed(reason);
     m_filesNetJob.reset();
 }
 
 void Technic::SolderPackInstallTask::downloadProgressChanged(qint64 current, qint64 total)
 {
+    m_abortable = true;
     setProgress(current / 2, total);
 }
 

api/logic/modplatform/technic/SolderPackInstallTask.h

@@ -29,6 +29,9 @@ namespace Technic
     public:
         explicit SolderPackInstallTask(const QUrl &sourceUrl, const QString &minecraftVersion);
 
+        bool canAbort() const override { return true; }
+        bool abort() override;
+
     protected:
         //! Entry point for tasks.
         virtual void executeTask() override;
@@ -43,6 +46,8 @@ namespace Technic
         void extractAborted();
 
     private:
+        bool m_abortable = false;
+
         NetJobPtr m_filesNetJob;
         QUrl m_sourceUrl;
         QString m_minecraftVersion;