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feat: add MultipleOptionsTask

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This is a variation of a Sequential Task, in which a subtask failing
will prompt the next one to execute, and a subtask being successful will
stop the task.

This way, this can be used for easily managing fallbacks with tasks. :D

Signed-off-by: flow <flowlnlnln@gmail.com>
This commit is contained in:
flow
2022-06-02 19:34:08 -03:00
parent dd6aabf9ab
commit 9a44c92211
4 changed files with 76 additions and 7 deletions
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48
launcher/tasks/MultipleOptionsTask.cpp Normal file
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#include "MultipleOptionsTask.h"
#include <QDebug>
MultipleOptionsTask::MultipleOptionsTask(QObject* parent, const QString& task_name) : SequentialTask(parent, task_name) {}
void MultipleOptionsTask::startNext()
{
Task* previous = nullptr;
if (m_currentIndex != -1) {
previous = m_queue[m_currentIndex].get();
disconnect(previous, 0, this, 0);
}
m_currentIndex++;
if ((previous && previous->wasSuccessful())) {
emitSucceeded();
return;
}
Task::Ptr next = m_queue[m_currentIndex];
connect(next.get(), &Task::failed, this, &MultipleOptionsTask::subTaskFailed);
connect(next.get(), &Task::succeeded, this, &MultipleOptionsTask::startNext);
connect(next.get(), &Task::status, this, &MultipleOptionsTask::subTaskStatus);
connect(next.get(), &Task::stepStatus, this, &MultipleOptionsTask::subTaskStatus);
connect(next.get(), &Task::progress, this, &MultipleOptionsTask::subTaskProgress);
qDebug() << QString("Making attemp %1 out of %2").arg(m_currentIndex + 1).arg(m_queue.size());
setStatus(tr("Making attempt #%1 out of %2").arg(m_currentIndex + 1).arg(m_queue.size()));
setStepStatus(next->isMultiStep() ? next->getStepStatus() : next->getStatus());
next->start();
}
void MultipleOptionsTask::subTaskFailed(QString const& reason)
{
qDebug() << QString("Failed attempt #%1 of %2. Reason: %3").arg(m_currentIndex + 1).arg(m_queue.size()).arg(reason);
if(m_currentIndex < m_queue.size() - 1) {
startNext();
return;
}
qWarning() << QString("All attempts have failed!");
emitFailed();
}