From 3c1f0b64fef45760a0234ac6b676ca9042dc7d0d Mon Sep 17 00:00:00 2001
From: pascal <pascal@pakab.de>
Date: Sun, 8 Dec 2024 18:51:32 +0100
Subject: [PATCH] implement TimeRangeEditor pb_begin_to_last_end

---
 src/timerangeeditor.cpp        | 21 ++++++++++++++++-----
 src/timerangeeditor.h          |  3 ++-
 src/views/perioddetailview.cpp |  2 +-
 3 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/src/timerangeeditor.cpp b/src/timerangeeditor.cpp
index 28b5582..f48531d 100644
--- a/src/timerangeeditor.cpp
+++ b/src/timerangeeditor.cpp
@@ -2,26 +2,37 @@
 
 #include "application.h"
 #include "datetimeselector.h"
+#include "intervalmodel.h"
 #include "ui_timerangeeditor.h"
 
 #include <QMessageBox>
 
-TimeRangeEditor::TimeRangeEditor(QWidget* const parent)
+TimeRangeEditor::TimeRangeEditor(const IntervalModel& interval_model, QWidget* const parent)
   : QDialog(parent), m_ui(std::make_unique<Ui::TimeRangeEditor>())
 {
   m_ui->setupUi(this);
   connect(m_ui->cb_has_end, &QCheckBox::toggled, this, &TimeRangeEditor::update_enabledness);
-  connect(m_ui->pb_begin_to_last_end, &QPushButton::clicked, this, []() {});
+  connect(m_ui->pb_begin_to_last_end, &QPushButton::clicked, this, [&interval_model, this]() {
+    auto ends_view =
+        interval_model.intervals() | std::views::transform(&Interval::end) | std::views::filter(&QDateTime::isValid);
+    if (const std::vector ends(ends_view.begin(), ends_view.end()); ends.empty()) {
+      QMessageBox::critical(this, "Error", "No end intervals were found");
+    } else {
+      const auto end = std::ranges::max_element(ends);
+      m_ui->de_begin->setDate(end->date());
+      m_ui->te_begin->setTime(end->time());
+    }
+  });
   connect(m_ui->pb_begin_to_now, &QPushButton::clicked, this, [this]() {
-    m_ui->te_begin->setDate(Application::current_date_time().date());
-    m_ui->de_begin->setTime(Application::current_date_time().time());
+    m_ui->te_begin->setTime(Application::current_date_time().time());
+    m_ui->de_begin->setDate(Application::current_date_time().date());
   });
   connect(m_ui->pb_end_to_begin, &QPushButton::clicked, this, [this]() {
     m_ui->te_end->setTime(m_ui->te_begin->time());
     m_ui->sp_end_offset->setValue(0);
   });
   connect(m_ui->pb_end_to_now, &QPushButton::clicked, this, [this]() {
-    const auto offset = m_ui->te_begin->date().daysTo(Application::current_date_time().date());
+    const auto offset = m_ui->de_begin->date().daysTo(Application::current_date_time().date());
     m_ui->sp_end_offset->setValue(offset);
     m_ui->te_end->setTime(Application::current_date_time().time());
   });
diff --git a/src/timerangeeditor.h b/src/timerangeeditor.h
index 4538e20..f3aaafe 100644
--- a/src/timerangeeditor.h
+++ b/src/timerangeeditor.h
@@ -3,6 +3,7 @@
 #include <QDateTime>
 #include <QDialog>
 
+class IntervalModel;
 namespace Ui
 {
 class TimeRangeEditor;
@@ -13,7 +14,7 @@ class TimeRangeEditor : public QDialog
   Q_OBJECT
 
 public:
-  explicit TimeRangeEditor(QWidget* parent = nullptr);
+  explicit TimeRangeEditor(const IntervalModel& interval_model, QWidget* parent = nullptr);
   ~TimeRangeEditor() override;
 
   void set_range(const QDateTime& begin, const QDateTime& end);
diff --git a/src/views/perioddetailview.cpp b/src/views/perioddetailview.cpp
index 73f30af..8b945f8 100644
--- a/src/views/perioddetailview.cpp
+++ b/src/views/perioddetailview.cpp
@@ -259,7 +259,7 @@ void PeriodDetailView::show_table_context_menu(const QPoint& pos)
 
 void PeriodDetailView::edit_date_time(const QModelIndex& index) const
 {
-  TimeRangeEditor e;
+  TimeRangeEditor e{time_sheet()->interval_model()};
   auto& interval = *time_sheet()->interval_model().intervals().at(index.row());
   e.set_range(interval.begin(), interval.end());
   if (e.exec() == QDialog::Accepted) {