Add ability to register custom actions

src/mainwindow.cpp

@@ -348,6 +348,10 @@ bool MainWindow::openProject(QString dir) {
 
     }
 
+    if (success) {
+        Scripting::cb_ProjectOpened(dir);
+    }
+
     return success;
 }
 
@@ -2844,3 +2848,16 @@ void MainWindow::setSecondaryTilesetPalettePreview(int paletteIndex, QList<QList
         return;
     this->setTilesetPalettePreview(this->editor->map->layout->tileset_secondary, paletteIndex, colors);
 }
+
+void MainWindow::registerAction(QString functionName, QString actionName) {
+    if (!this->ui || !this->ui->menuTools)
+        return;
+
+    Scripting::registerAction(functionName, actionName);
+    if (Scripting::numRegisteredActions() == 1) {
+        this->ui->menuTools->addSeparator();
+    }
+    this->ui->menuTools->addAction(actionName, [actionName](){
+       Scripting::invokeAction(actionName);
+    });
+}

src/scripting.cpp

@@ -2,6 +2,7 @@
 #include "log.h"
 
 QMap<CallbackType, QString> callbackFunctions = {
+    {OnProjectOpened, "on_project_opened"},
     {OnBlockChanged, "on_block_changed"},
     {OnMapOpened, "on_map_opened"},
 };
@@ -54,6 +55,44 @@ void Scripting::invokeCallback(CallbackType type, QJSValueList args) {
     }
 }
 
+void Scripting::registerAction(QString functionName, QString actionName) {
+    if (!instance) return;
+    instance->registeredActions.insert(actionName, functionName);
+}
+
+int Scripting::numRegisteredActions() {
+    if (!instance) return 0;
+    return instance->registeredActions.size();
+}
+
+void Scripting::invokeAction(QString actionName) {
+    if (!instance) return;
+    if (!instance->registeredActions.contains(actionName)) return;
+
+    QString functionName = instance->registeredActions.value(actionName);
+    for (QJSValue module : instance->modules) {
+        QJSValue callbackFunction = module.property(functionName);
+        if (callbackFunction.isError()) {
+            continue;
+        }
+
+        QJSValue result = callbackFunction.call(QJSValueList());
+        if (result.isError()) {
+            logError(QString("Module %1 encountered an error when calling '%2'").arg(module.toString()).arg(functionName));
+            continue;
+        }
+    }
+}
+
+void Scripting::cb_ProjectOpened(QString projectPath) {
+    if (!instance) return;
+
+    QJSValueList args {
+        projectPath,
+    };
+    instance->invokeCallback(OnProjectOpened, args);
+}
+
 void Scripting::cb_MetatileChanged(int x, int y, Block prevBlock, Block newBlock) {
     if (!instance) return;