Qml/Main: add error handling to installation

src/leek/qml/Main.qml

@@ -38,10 +38,40 @@ Kirigami.ApplicationWindow {
         selectedNameFilter.index: 0
 
         onAccepted: {
+            installInfoDialog.open();
+            QModInstaller.statusChanged.connect(() => {
+                switch (QModInstaller.status) {
+                case "initialized":
+                    if (QModInstaller.installed) {
+                        installInfoMessage.text = "This mod is already installed!";
+                        installInfoDialog.open();
+                    }
+                    break;
+                case "NoModExceptionError":
+                    installInfoMessage.text = "This file does not have a mod";
+                    installInfoDialog.open();
+                    break;
+                case "UnsupportedArchiveTypeError":
+                    installInfoMessage.text = "I don't know how to unpack this file, sorry :(";
+                    installInfoDialog.open();
+                    break;
+                }
+            });
             QModInstaller.modPath = selectedFile;
         }
     }
 
+    Kirigami.Dialog {
+        id: installInfoDialog
+        title: "Add mod"
+        standardButtons: Kirigami.Dialog.Ok
+        padding: Kirigami.Units.largeSpacing
+        Controls.Label {
+            id: installInfoMessage
+            text: "You should never see this text"
+        }
+    }
+
     pageStack.columnView.columnResizeMode: Kirigami.ColumnView.SingleColumn
     pageStack.initialPage: Kirigami.ScrollablePage {
         title: "Mods"

src/leek/qmod_installer.py

@@ -4,7 +4,7 @@ from urllib.parse import urlparse
 from PySide6.QtCore import Property, QObject, Signal
 from PySide6.QtQml import QmlElement, QmlSingleton
 
-from leek.mod_installer import ModInstaller, UnsupportedArchiveTypeError
+from leek.mod_installer import ModInstaller, UnsupportedArchiveTypeError, NoModExceptionError
 
 QML_IMPORT_NAME = "Leek.QModInstaller"
 QML_IMPORT_MAJOR_VERSION = 1
@@ -43,6 +43,9 @@ class QModInstaller(QObject):
         except UnsupportedArchiveTypeError:
             self.__status = "UnsupportedArchiveTypeError"
             self.status_changed.emit()
+        except NoModExceptionError:
+            self.__status = "NoModExceptionError"
+            self.status_changed.emit()
 
     install_status_changed = Signal(name="installStatusChanged")