Read project list in settings wizard from database (#1194)

* Settings Wizard read Projects from Database #1074

* Fixed unsafe path

* Added comments

activity_browser/ui/wizards/settings_wizard.py

@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 import brightway2 as bw
 from PySide2 import QtWidgets, QtCore
+from peewee import SqliteDatabase
 import os
 import re
 
@@ -109,12 +110,12 @@ def __init__(self, parent=None):
 
     def bw_projects(self, path: str):
         """ Finds the bw_projects from the brightway2 environment provided by path"""
-        projects = []
-        for dir in [dir for dir in os.listdir(path) if os.path.isdir(path + "/" + dir)]:
-            project = re.match(r'(\w+)\.', dir)
-            if project:
-                projects.append(project.group(1))
-        return projects
+        # open the project database
+        db = SqliteDatabase(os.path.join(path, "projects.db"))
+
+        # find all project names using sql query and return
+        cursor = db.execute_sql('SELECT "name" FROM "projectdataset"')
+        return [ i[0] for i in cursor.fetchall()]
 
     def restore_defaults(self):
         self.change_bw_dir(ab_settings.get_default_directory())