add prior expo experience (readonly)

parsers/users.py

@@ -8,7 +8,8 @@ from django.conf import settings
 from django.contrib.auth.models import User
 from django.db import models
 
-from troggle.core.models.troggle import DataIssue, Person
+from troggle.core.models.troggle import DataIssue, Person, PersonExpedition
+from troggle.core.utils import current_expo
 
 """This imports the registered troggle users, who are nearly-all, but not quite, Persons.
 exceptions are "expo" and "expoadmin" which are created by the databaseReset.py import program.
@@ -19,12 +20,16 @@ Passwords are only ever stored as hashes using the standard Django functions.
 """
 
 todo = """  
-- Make all this work with New people who have never been on expo before
+- Not fully tested, needs experience
 """
 
 USERS_FILE = "users.json"
 ENCRYPTED_DIR = "encrypted"
 
+def how_many_previous_expos(person):
+    return PersonExpedition.objects.filter(person=person).exclude(expedition__year=current_expo()).count()
+
+
 def register_user(u, email, password=None, pwhash=None, fullname=""):
     """Create User and we may not have a Person to tie it to if it is a future caver.
     Do not use the lastname field, put the whole free text identification into firstname