Add global context 'roles'

- Access via template e.g. {% if roles.part.view %}
- Always True if the user is a superuser

InvenTree/InvenTree/context.py

@@ -17,3 +17,36 @@ def status_codes(request):
         'BuildStatus': BuildStatus,
         'StockStatus': StockStatus,
     }
+
+
+def user_roles(request):
+    """
+    Return a map of the current roles assigned to the user.
+    
+    Roles are denoted by their simple names, and then the permission type.
+
+    Permissions can be access as follows:
+
+    - roles.part.view
+    - roles.build.delete
+
+    Each value will return a boolean True / False
+    """
+
+    user = request.user
+
+    roles = {}
+
+    for group in user.groups.all():
+        for rule in group.rule_sets.all():
+            roles[rule.name] = {
+                'view': rule.can_view or user.is_superuser,
+                'add': rule.can_add or user.is_superuser,
+                'change': rule.can_change or user.is_superuser,
+                'delete': rule.can_delete or user.is_superuser,
+            }
+
+    print("Roles:")
+    print(roles)
+
+    return {'roles': roles}

InvenTree/InvenTree/settings.py

@@ -210,6 +210,7 @@ TEMPLATES = [
                 'django.contrib.auth.context_processors.auth',
                 'django.contrib.messages.context_processors.messages',
                 'InvenTree.context.status_codes',
+                'InvenTree.context.user_roles',
             ],
         },
     },