feat: Warn for commands with duplicate triggers (#4322)

Co-authored-by: pajlada <rasmus.karlsson@pajlada.com>

src/widgets/settingspages/CommandPage.cpp

@@ -11,6 +11,7 @@
 #include "util/StandardItemHelper.hpp"
 #include "widgets/helper/EditableModelView.hpp"
 
+#include <QColor>
 #include <QHeaderView>
 #include <QLabel>
 #include <QPushButton>
@@ -22,26 +23,73 @@
 #define TEXT "{1} => first word &nbsp;&nbsp;&nbsp; {1+} => first word and after &nbsp;&nbsp;&nbsp; {{ => { &nbsp;&nbsp;&nbsp; <a href='https://chatterino.com/help/commands'>more info</a>"
 // clang-format on
 
-namespace chatterino {
 namespace {
-    QString c1settingsPath()
+
+using namespace chatterino;
+
+QString c1settingsPath()
+{
+    return combinePath(qgetenv("appdata"), "Chatterino\\Custom\\Commands.txt");
+}
+
+void checkCommandDuplicates(EditableModelView *view, QLabel *duplicateWarning)
+{
+    bool foundDuplicateTrigger = false;
+
+    // Maps command triggers to model row indices
+    std::unordered_map<QString, std::vector<int>> commands;
+
+    for (int i = 0; i < view->getModel()->rowCount(); i++)
     {
-        return combinePath(qgetenv("appdata"),
-                           "Chatterino\\Custom\\Commands.txt");
+        QString commandTrigger =
+            view->getModel()->index(i, 0).data().toString();
+        commands[commandTrigger].push_back(i);
     }
+
+    for (const auto &[commandTrigger, rowIndices] : commands)
+    {
+        assert(!rowIndices.empty());
+
+        if (rowIndices.size() > 1)
+        {
+            foundDuplicateTrigger = true;
+
+            for (const auto &rowIndex : rowIndices)
+            {
+                view->getModel()->setData(view->getModel()->index(rowIndex, 0),
+                                          QColor("yellow"), Qt::ForegroundRole);
+            }
+        }
+        else
+        {
+            view->getModel()->setData(view->getModel()->index(rowIndices[0], 0),
+                                      QColor("white"), Qt::ForegroundRole);
+        }
+    }
+
+    if (foundDuplicateTrigger)
+    {
+        duplicateWarning->show();
+    }
+    else
+    {
+        duplicateWarning->hide();
+    }
+}
+
 }  // namespace
 
+namespace chatterino {
+
 CommandPage::CommandPage()
 {
-    auto *app = getApp();
-
     LayoutCreator<CommandPage> layoutCreator(this);
     auto layout = layoutCreator.setLayoutType<QVBoxLayout>();
 
-    EditableModelView *view = layout
-                                  .emplace<EditableModelView>(
-                                      app->getCommands()->createModel(nullptr))
-                                  .getElement();
+    auto *view = layout
+                     .emplace<EditableModelView>(
+                         getIApp()->getCommands()->createModel(nullptr))
+                     .getElement();
 
     view->setTitles({"Trigger", "Command", "Show In\nMessage Menu"});
     view->getTableView()->horizontalHeader()->setSectionResizeMode(
@@ -83,6 +131,39 @@ CommandPage::CommandPage()
     text->setStyleSheet("color: #bbb");
     text->setOpenExternalLinks(true);
 
+    auto *duplicateWarning =
+        layout
+            .emplace<QLabel>("Multiple commands with the same trigger found. "
+                             "Only one of the commands will work.")
+            .getElement();
+    duplicateWarning->setStyleSheet("color: yellow");
+
+    // NOTE: These signals mean that the duplicate check happens in the middle of a row being moved, where he index can be wrong.
+    // This should be reconsidered, or potentially changed in the signalvectormodel. Or maybe we rely on a SignalVectorModel signal instead
+    QObject::connect(view->getModel(), &QAbstractItemModel::rowsInserted, this,
+                     [view, duplicateWarning]() {
+                         checkCommandDuplicates(view, duplicateWarning);
+                     });
+
+    QObject::connect(view->getModel(), &QAbstractItemModel::rowsRemoved, this,
+                     [view, duplicateWarning]() {
+                         checkCommandDuplicates(view, duplicateWarning);
+                     });
+
+    QObject::connect(view->getModel(), &QAbstractItemModel::dataChanged, this,
+                     [view, duplicateWarning](const QModelIndex &topLeft,
+                                              const QModelIndex &bottomRight,
+                                              const QVector<int> &roles) {
+                         (void)topLeft;
+                         (void)bottomRight;
+                         if (roles.contains(Qt::EditRole))
+                         {
+                             checkCommandDuplicates(view, duplicateWarning);
+                         }
+                     });
+
+    checkCommandDuplicates(view, duplicateWarning);
+
     // ---- end of layout
     this->commandsEditTimer_.setSingleShot(true);
 }

src/widgets/settingspages/CommandPage.hpp

@@ -2,7 +2,6 @@
 
 #include "widgets/settingspages/SettingsPage.hpp"
 
-#include <QTextEdit>
 #include <QTimer>
 
 namespace chatterino {