From 760aee0c8f5d1be3a8063522f1decf9e390df2a9 Mon Sep 17 00:00:00 2001
From: "Veronica K. B. Olsen" <1619840+vkbo@users.noreply.github.com>
Date: Thu, 13 Feb 2020 21:12:28 +0100
Subject: [PATCH] Added a function to clean out old project files no longer
 needed

---
 nw/project/project.py |  6 ++++++
 nw/tools/__init__.py  |  2 ++
 nw/tools/legacy.py    | 47 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 55 insertions(+)
 create mode 100644 nw/tools/legacy.py

diff --git a/nw/project/project.py b/nw/project/project.py
index 60cdfa72..03aacf42 100644
--- a/nw/project/project.py
+++ b/nw/project/project.py
@@ -22,6 +22,7 @@ from time import time
 
 from nw.project.status import NWStatus
 from nw.project.item import NWItem
+from nw.tools import projectMaintenance
 from nw.common import checkString, checkBool, checkInt
 from nw.constants import (
     nwFiles, nwConst, nwItemType, nwItemClass, nwItemLayout, nwAlert
@@ -200,6 +201,11 @@ class NWProject():
         if not self._checkFolder(self.projMeta):
             return
 
+        try:
+            projectMaintenance(self)
+        except Exception as E:
+            logger.error(str(E))
+
         try:
             nwXML = etree.parse(fileName)
         except Exception as e:
diff --git a/nw/tools/__init__.py b/nw/tools/__init__.py
index 582d18fb..71f6b141 100644
--- a/nw/tools/__init__.py
+++ b/nw/tools/__init__.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 
 from nw.tools.analyse import TextAnalysis
+from nw.tools.legacy import projectMaintenance
 from nw.tools.optlaststate import OptLastState
 from nw.tools.spellcheck import NWSpellCheck
 from nw.tools.spellenchant import NWSpellEnchant
@@ -10,6 +11,7 @@ from nw.tools.wordcount import countWords
 
 __all__ = [
     "TextAnalysis",
+    "projectMaintenance",
     "OptLastState",
     "NWSpellCheck",
     "NWSpellEnchant",
diff --git a/nw/tools/legacy.py b/nw/tools/legacy.py
new file mode 100644
index 00000000..7b622cb6
--- /dev/null
+++ b/nw/tools/legacy.py
@@ -0,0 +1,47 @@
+# -*- coding: utf-8 -*-
+"""novelWriter Legacy Tools
+
+ novelWriter – Legacy Tools
+============================
+ Various functions to handle old projects
+
+ File History:
+ Created: 2020-02-13 [0.4.3]
+
+"""
+
+import logging
+import nw
+
+from os import path, unlink, rmdir
+
+logger = logging.getLogger(__name__)
+
+def projectMaintenance(theProject):
+    """Wrapper class for handling various tasks related to managing old
+    projects with content from older versions of novelWriter.
+    """
+
+    # Remove no longer used project cache folder
+    if path.isdir(theProject.projPath):
+        cacheDir = path.join(theProject.projPath, "cache")
+        if path.isdir(cacheDir):
+            logger.info("Deprecated cache folder found")
+            rmList = []
+            for i in range(10):
+                rmList.append(path.join(cacheDir, "nwProject.nwx.%d" % i))
+            rmList.append(path.join(cacheDir, "projCount.txt"))
+            for rmFile in rmList:
+                if path.isfile(rmFile):
+                    logger.info("Deleting: %s" % rmFile)
+                    try:
+                        unlink(rmFile)
+                    except Exception as e:
+                        logger.error(str(e))
+            logger.info("Deleting: %s" % cacheDir)
+            try:
+                rmdir(cacheDir)
+            except Exception as e:
+                logger.error(str(e))
+
+    return