Move version upgrade for intents from 4.1-4.2 to 4.3-4.4

CURA-6599

plugins/VersionUpgrade/VersionUpgrade43to44/VersionUpgrade43to44.py

@@ -0,0 +1,68 @@
+import configparser
+from typing import Tuple, List
+import io
+from UM.VersionUpgrade import VersionUpgrade
+
+
+class VersionUpgrade43to44(VersionUpgrade):
+    pass
+
+    def getCfgVersion(self, serialised: str) -> int:
+        parser = configparser.ConfigParser(interpolation = None)
+        parser.read_string(serialised)
+        format_version = int(parser.get("general", "version"))  # Explicitly give an exception when this fails. That means that the file format is not recognised.
+        setting_version = int(parser.get("metadata", "setting_version", fallback = "0"))
+        return format_version * 1000000 + setting_version
+
+    ##  Upgrades Preferences to have the new version number.
+    #
+    #   This renames the renamed settings in the list of visible settings.
+    def upgradePreferences(self, serialized: str, filename: str) -> Tuple[List[str], List[str]]:
+        parser = configparser.ConfigParser(interpolation = None)
+        parser.read_string(serialized)
+
+        # Update version number.
+        parser["metadata"]["setting_version"] = "10"
+
+        result = io.StringIO()
+        parser.write(result)
+        return [filename], [result.getvalue()]
+
+    ##  Upgrades instance containers to have the new version
+    #   number.
+    #
+    #   This renames the renamed settings in the containers.
+    def upgradeInstanceContainer(self, serialized: str, filename: str) -> Tuple[List[str], List[str]]:
+        parser = configparser.ConfigParser(interpolation=None)
+        parser.read_string(serialized)
+
+        # Update version number.
+        parser["metadata"]["setting_version"] = "10"
+
+        result = io.StringIO()
+        parser.write(result)
+        return [filename], [result.getvalue()]
+
+    ##  Upgrades stacks to have the new version number.
+    def upgradeStack(self, serialized: str, filename: str) -> Tuple[List[str], List[str]]:
+        parser = configparser.ConfigParser(interpolation=None)
+        parser.read_string(serialized)
+
+        # Update version number.
+        parser["metadata"]["setting_version"] = "10"
+        parser["general"]["version"] = "5"
+
+        # We should only have 6 levels when we start.
+        assert "7" not in parser["containers"]
+
+        # We added the intent container in Cura 4.4. This means that all other containers move one step down.
+        parser["containers"]["7"] = parser["containers"]["6"]
+        parser["containers"]["6"] = parser["containers"]["5"]
+        parser["containers"]["5"] = parser["containers"]["4"]
+        parser["containers"]["4"] = parser["containers"]["3"]
+        parser["containers"]["3"] = parser["containers"]["2"]
+        parser["containers"]["2"] = "empty_intent"
+
+        result = io.StringIO()
+        parser.write(result)
+        return [filename], [result.getvalue()]