Add num_gildings to keep track of gildings count

This will include all types of gildings (gildings of users, links, comments). It
will primarily be used to figure out the proper gilding trophy level since the
previous method could only include up to 1000 gildings.

A backfill script (num_gildings.py) has been created in scripts/migrate/backfill/.

r2/r2/controllers/ipn.py

@@ -35,6 +35,7 @@ from r2.lib.csrf import csrf_exempt
 from r2.lib.emailer import _system_email
 from r2.lib.errors import MessageError
 from r2.lib.filters import _force_unicode, _force_utf8
+from r2.lib.hooks import get_hook
 from r2.lib.log import log_text
 from r2.lib.pages import GoldGiftCodeEmail
 from r2.lib.strings import strings
@@ -260,11 +261,16 @@ def send_gift(buyer, recipient, months, days, signed, giftmessage,
               thing_fullname, note=None):
     admintools.adjust_gold_expiration(recipient, days=days)
 
+    # increment num_gildings for all types of gildings not to themselves
+    if buyer != recipient:
+        buyer._incr("num_gildings")
+
     if thing_fullname:
         thing = Thing._by_fullname(thing_fullname, data=True)
         thing._gild(buyer)
     else:
         thing = None
+        get_hook('user.gild').call(recipient=recipient, gilder=buyer)
 
     if signed:
         sender = buyer.name

r2/r2/models/account.py

@@ -64,6 +64,7 @@ class Account(Thing):
                                                'inbox_count',
                                                'num_payment_methods',
                                                'num_failed_payments',
+                                               'num_gildings',
                                               )
     _int_prop_suffix = '_karma'
     _essentials = ('name', )
@@ -127,6 +128,7 @@ class Account(Thing):
                      gold = False,
                      gold_charter = False,
                      gold_creddits = 0,
+                     num_gildings=0,
                      cake_expiration=None,
                      otp_secret=None,
                      state=0,