Enable deleting apps by using CLI

areas/apps/models.py

@@ -58,9 +58,9 @@ class App(db.Model):
         if ks_ready and hr_ready:
             return "App installed and running"
         if not hr_ready:
-            return f"App failed installing: {hr_message}"
+            return f"App HelmRelease status: {hr_message}"
         if not ks_ready:
-            return f"App failed installing: {ks_message}"
+            return f"App Kustomization status: {ks_message}"
         return "App is installing..."
 
 
@@ -71,6 +71,32 @@ class App(db.Model):
         # Create add-<app> kustomization
         self.__create_kustomization()
 
+    def delete(self):
+        """
+        Fully deletes an application
+
+        This includes user roles, all kubernetes objects and also PVCs, so your
+        data will be *gone*
+        """
+        # Delete all roles first
+        for role in self.roles:
+            db.session.delete(role)
+
+        # Delete the kustomization
+        if self.__delete_kustomization():
+
+        # TODO: This is where we might want to poll for status changes in the
+        # app, so that only once the kustomization and all its stuff (other ks,
+        # helmrelease, etc.) is deleted, we continue
+
+        # If the kustomization delete went well, commit DB changes.
+            db.session.commit()
+            # Then delete the app
+            db.session.delete(self)
+            db.session.commit()
+            return True
+        return False
+
     def __generate_secrets(self):
         """Generates passwords for app installation"""
         # Create app variables secret
@@ -90,11 +116,10 @@ class App(db.Model):
                 "add-app-kustomization.yaml.jinja")
         k8s.store_kustomization(kustomization_template_filepath, self.slug)
 
+    def __delete_kustomization(self):
+        """Deletes kustomization for this app"""
+        k8s.delete_kustomization(f"add-{self.slug}")
 
-    @staticmethod
-    def __get_templates_dir():
-        """Returns directory that contains the Jinja templates used to create app secrets."""
-        return os.path.join(os.path.dirname(os.path.realpath(__file__)), "templates")
 
     @property
     def variables_template_filepath(self):
@@ -116,6 +141,20 @@ class App(db.Model):
             return 'stackspin-apps'
         return 'stackspin'
 
+    @property
+    def roles(self):
+        """
+        All roles that are linked to this app
+        """
+        return AppRole.query.filter_by(
+            app_id=self.id
+        ).all()
+
+    @staticmethod
+    def __get_templates_dir():
+        """Returns directory that contains the Jinja templates used to create app secrets."""
+        return os.path.join(os.path.dirname(os.path.realpath(__file__)), "templates")
+
     @staticmethod
     def check_condition(status):
         """