Launching of simulation application

src/bedit_gui/controllers/simulation_controller.py

@@ -0,0 +1,89 @@
+from __future__ import annotations
+
+import sys
+import tempfile
+from collections.abc import Callable
+from pathlib import Path
+
+from PySide6.QtCore import QObject, QProcess, Qt
+from PySide6.QtWidgets import QApplication, QMessageBox
+
+from bedit_core.models import Component
+from bedit_gui.documents import Document
+from bedit_gui.services import simulation_files
+from bedit_gui.services.simulation_loader import component_choices
+from bedit_gui.simulation_models import CompiledModel, SimulationRoot
+from bedit_gui.views.main_window import MainWindow
+from bedit_simulation import ModelBuildResult, compile_component_sync
+
+Compiler = Callable[[Component, str | Path], ModelBuildResult]
+Launcher = Callable[[Path, CompiledModel], bool]
+
+
+def _launch_simulator(path: Path, compiled_model: CompiledModel) -> bool:
+    arguments = ["-m", "bedit_gui.simulation_application", "--handoff", "--model-name", compiled_model.model_name, "--executable", compiled_model.executable, "--working-directory", compiled_model.working_directory, str(path)]
+    launched = QProcess.startDetached(sys.executable, arguments)
+    return launched[0] if isinstance(launched, tuple) else bool(launched)
+
+
+class SimulationController(QObject):
+    """Compile the active BEdit simulation and launch the simulator process."""
+
+    def __init__(self, document: Document, window: MainWindow, compiler: Compiler = compile_component_sync, launcher: Launcher = _launch_simulator) -> None:
+        super().__init__(window)
+        self.document = document
+        self.window = window
+        self.compiler = compiler
+        self.launcher = launcher
+        self.compiled_root: SimulationRoot | None = None
+        self.compiled_model: CompiledModel | None = None
+        window.ui.actionCompile_Model.triggered.connect(self.compile_model)
+        window.ui.actionOpen_Simulation_Window.triggered.connect(self.open_simulation)
+
+    def compile_model(self) -> SimulationRoot | None:
+        database = self.document.simulation_database()
+        settings = database.simulations.get(database.active_simulation) if database.active_simulation is not None else None
+        if settings is None:
+            QMessageBox.warning(self.window, "No active simulation", "Select and accept a simulation settings block first.")
+            return None
+        match = next((choice for choice in component_choices(self.document.model) if choice[0] == settings.component), None)
+        if match is None:
+            QMessageBox.critical(self.window, "Could not compile", "The active simulation references a missing component.")
+            return None
+        component_id, component, component_path = match
+        build_directory = Path(tempfile.mkdtemp(prefix="bedit-compiled-"))
+        QApplication.setOverrideCursor(Qt.CursorShape.WaitCursor)
+        self.window.statusBar().showMessage(f"Compiling {component_path}…")
+        try:
+            build = self.compiler(component, build_directory)
+        except (OSError, RuntimeError, ValueError) as exc:
+            QMessageBox.critical(self.window, "Could not compile", str(exc))
+            self.window.statusBar().showMessage("Compilation failed")
+            return None
+        finally:
+            QApplication.restoreOverrideCursor()
+        self.compiled_model = CompiledModel(build.model_name, str(build.executable.resolve()), str(build.executable.parent.resolve()))
+        self.compiled_root = SimulationRoot(
+            format_version=1,
+            source_document=str(self.document.path.resolve()) if self.document.path is not None else None,
+            source_document_id=str(self.document.model.id),
+            component=component_id,
+            component_path=component_path,
+            settings_name=settings.name,
+            settings=settings,
+        )
+        self.window.statusBar().showMessage(f"Compiled {component_path}")
+        return self.compiled_root
+
+    def open_simulation(self) -> None:
+        root = self.compile_model()
+        if root is None or self.compiled_model is None:
+            return
+        transfer_directory = Path(tempfile.mkdtemp(prefix="bedit-simulator-launch-"))
+        transfer_path = transfer_directory / "simulation.bes"
+        try:
+            simulation_files.save(root, transfer_path)
+            if not self.launcher(transfer_path, self.compiled_model):
+                raise RuntimeError("the simulator process could not be started")
+        except (OSError, RuntimeError, ValueError) as exc:
+            QMessageBox.critical(self.window, "Could not open simulator", str(exc))