Add Install method to software.

src/primaite/simulator/system/services/database.py

@@ -1,3 +1,5 @@
+from typing import Dict
+
 from primaite.simulator.file_system.file_system_file_type import FileSystemFileType
 from primaite.simulator.network.hardware.base import Node
 from primaite.simulator.system.services.service import Service
@@ -6,11 +8,17 @@ from primaite.simulator.system.services.service import Service
 class DatabaseService(Service):
     """TODO."""
 
-    def __init__(self, parent_node: Node, **kwargs):
-        super().__init__(**kwargs)
-        self._setup_files_on_node()
+    def describe_state(self) -> Dict:
+        """TODO."""
+        return super().describe_state()
 
-    def _setup_files_on_node(
+    def install(self) -> None:
+        """Perform first time install on a node, creating necessary files."""
+        super().install()
+        assert isinstance(self.parent, Node), "Database install can only happen after the db service is added to a node"
+        self._setup_files()
+
+    def _setup_files(
         self,
         db_size: int = 1000,
         use_secondary_db_file: bool = False,
@@ -30,6 +38,7 @@ class DatabaseService(Service):
         """
         # note that this parent.file_system.create_folder call in the future will be authenticated by using permissions
         # handler. This permission will be granted based on service account given to the database service.
+        self.parent: Node
         folder = self.parent.file_system.create_folder(folder_name)
         self.parent.file_system.create_file("db_primary_store", db_size, FileSystemFileType.MDF, folder=folder)
         self.parent.file_system.create_file("db_transaction_log", "1", FileSystemFileType.LDF, folder=folder)
@@ -37,7 +46,3 @@ class DatabaseService(Service):
             self.parent.file_system.create_file(
                 "db_secondary_store", secondary_db_size, FileSystemFileType.NDF, folder=folder
             )
-
-    # todo next:
-    # create session? (maybe not)
-    # add actions for setting service state to compromised? (probably definitely)