Split recurring events properly

Previously we moved each VEVENT into its own Item, now we group by UID,
if one exists.

CHANGELOG.rst

@@ -9,6 +9,12 @@ Package maintainers and users who have to manually update their installation
 may want to subscribe to `GitHub's tag feed
 <https://github.com/pimutils/vdirsyncer/tags.atom>`_.
 
+Version 0.9.3
+=============
+
+- :storage:`singlefile` and :storage:`http` now handle recurring events
+  properly.
+
 Version 0.9.2
 =============
 

tests/storage/__init__.py

@@ -2,6 +2,8 @@
 
 import random
 
+import textwrap
+
 from hypothesis import given
 import hypothesis.strategies as st
 
@@ -12,7 +14,7 @@ from vdirsyncer.storage.base import Item, normalize_meta_value
 from vdirsyncer.utils.compat import iteritems, text_type, urlquote, urlunquote
 
 from .. import EVENT_TEMPLATE, TASK_TEMPLATE, VCARD_TEMPLATE, \
-    assert_item_equals, printable_characters_strategy
+    assert_item_equals, normalize_item, printable_characters_strategy
 
 
 def get_server_mixin(server_name):
@@ -285,3 +287,49 @@ class StorageTests(object):
             # ownCloud replaces "" with "unnamed"
             s.set_meta('displayname', value)
             assert s.get_meta('displayname') == normalize_meta_value(value)
+
+    def test_recurring_events(self, s, item_type):
+        if item_type != 'VEVENT':
+            pytest.skip('This storage instance doesn\'t support iCalendar.')
+
+        uid = u'abc123'
+        item = Item(textwrap.dedent(u'''
+        BEGIN:VCALENDAR
+        VERSION:2.0
+        BEGIN:VEVENT
+        DTSTART;TZID=Australia/Sydney:20140325T084000
+        DTEND;TZID=Australia/Sydney:20140325T101000
+        DTSTAMP:20140327T060506Z
+        UID:{uid}
+        RECURRENCE-ID;TZID=Australia/Sydney:20140325T083000
+        CREATED:20131216T033331Z
+        DESCRIPTION:
+        LAST-MODIFIED:20140327T060215Z
+        LOCATION:
+        SEQUENCE:1
+        STATUS:CONFIRMED
+        SUMMARY:test Event
+        TRANSP:OPAQUE
+        END:VEVENT
+        BEGIN:VEVENT
+        DTSTART;TZID=Australia/Sydney:20140128T083000
+        DTEND;TZID=Australia/Sydney:20140128T100000
+        RRULE:FREQ=WEEKLY;UNTIL=20141208T213000Z;BYDAY=TU
+        DTSTAMP:20140327T060506Z
+        UID:{uid}
+        CREATED:20131216T033331Z
+        DESCRIPTION:
+        LAST-MODIFIED:20140222T101012Z
+        LOCATION:
+        SEQUENCE:0
+        STATUS:CONFIRMED
+        SUMMARY:Test event
+        TRANSP:OPAQUE
+        END:VEVENT
+        END:VCALENDAR
+        '''.format(uid=uid)).strip())
+
+        href, etag = s.upload(item)
+
+        item2, etag2 = s.get(href)
+        assert normalize_item(item) == normalize_item(item2)

vdirsyncer/utils/vobject.py

@@ -4,7 +4,7 @@ import hashlib
 from itertools import chain, tee
 
 from . import cached_property, uniq
-from .compat import text_type
+from .compat import itervalues, text_type
 
 
 def _process_properties(*s):
@@ -114,17 +114,24 @@ def hash_item(text):
 def split_collection(text):
     assert isinstance(text, text_type)
     inline = []
-    items = []
+    items = {}  # uid => item
+    ungrouped_items = []
 
     def inner(item, main):
         if item.name == u'VTIMEZONE':
             inline.append(item)
         elif item.name == u'VCARD':
-            items.append(item)
+            ungrouped_items.append(item)
         elif item.name in (u'VTODO', u'VEVENT', u'VJOURNAL'):
-            items.append(_Component(main.name,
+            uid = item.get(u'UID', u'')
-                                    main.props[:],
+            wrapper = _Component(main.name, main.props[:], [])
-                                    [item]))
+
+            if uid.strip():
+                wrapper = items.setdefault(uid, wrapper)
+            else:
+                ungrouped_items.append(wrapper)
+
+            wrapper.subcomponents.append(item)
         elif item.name in (u'VCALENDAR', u'VADDRESSBOOK'):
             for subitem in item.subcomponents:
                 inner(subitem, item)
@@ -135,7 +142,7 @@ def split_collection(text):
     for main in _Component.parse(text, multiple=True):
         inner(main, main)
 
-    for item in items:
+    for item in chain(itervalues(items), ungrouped_items):
         item.subcomponents.extend(inline)
         yield u'\r\n'.join(item.dump_lines())
 
@@ -316,3 +323,9 @@ class _Component(object):
                 break
 
         return rv
+
+    def get(self, key, default=None):
+        try:
+            return self[key]
+        except KeyError:
+            return default