Add version upgrade for 4.0

Contributes to CURA-6011 and CURA-5995

plugins/VersionUpgrade/VersionUpgrade35to40/VersionUpgrade35to40.py

@@ -0,0 +1,68 @@
+import configparser
+from typing import Tuple, List, Set
+import io
+from UM.VersionUpgrade import VersionUpgrade
+from cura.PrinterOutputDevice import ConnectionType
+deleted_settings = {"bridge_wall_max_overhang"}  # type: Set[str]
+
+
+class VersionUpgrade35to40(VersionUpgrade):
+    #  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["general"]["version"] = "4"
+        parser["metadata"]["setting_version"] = "6"
+
+        if parser["metadata"].get("um_network_key") is not None or parser["metadata"].get("octoprint_api_key") is not None:
+            # Set the connection type if um_network_key or the octoprint key is set.
+            parser["metadata"]["connection_type"] = str(ConnectionType.NetworkConnection.value)
+
+        result = io.StringIO()
+        parser.write(result)
+        return [filename], [result.getvalue()]
+        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.
+    def upgradePreferences(self, serialized: str, filename: str) -> Tuple[List[str], List[str]]:
+        parser = configparser.ConfigParser(interpolation=None)
+        parser.read_string(serialized)
+
+        if "metadata" not in parser:
+            parser["metadata"] = {}
+        parser["general"]["version"] = "6"
+        parser["metadata"]["setting_version"] = "6"
+
+        result = io.StringIO()
+        parser.write(result)
+        return [filename], [result.getvalue()]
+
+    ##  Upgrades instance containers to have the new version
+    #   number.
+    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["general"]["version"] = "4"
+        parser["metadata"]["setting_version"] = "6"
+
+        #self._resetConcentric3DInfillPattern(parser)
+        if "values" in parser:
+            for deleted_setting in deleted_settings:
+                if deleted_setting not in parser["values"]:
+                    continue
+                del parser["values"][deleted_setting]
+
+        result = io.StringIO()
+        parser.write(result)
+        return [filename], [result.getvalue()]