parser: Don't group patches with different versions in a series

As noted in #340 [1], if a patch from a series is dropped or
miscategorised, patches from a later revision of that series can end up
included in the earlier series rather than in their own series. This was
actually intentional as part of the fix for #105 [2]. However,
completely ignoring this information can be problematic. Refine things
by checking for versions and, if they don't match, using timeboxing to
try guess if they should be kept together. This would resolve the issue
seen in #340 while preventing a regression for #105.

[1] https://github.com/getpatchwork/patchwork/issues/340
[1] https://github.com/getpatchwork/patchwork/issues/105

Signed-off-by: Stephen Finucane <stephen@that.guru>
Tested-by: Ali Alnubani <alialnu@mellanox.com>
Related: #340
Related: #105

4 files changed, 150 insertions, 0 deletions

diff --git a/patchwork/parser.py b/patchwork/parser.py
index 0e88d93..45930b4 100644
--- a/patchwork/parser.py
+++ b/patchwork/parser.py
@@ -250,14 +250,32 @@ def _find_series_by_references(project, mail):
     Returns:
         The matching ``Series`` instance, if any
     """
+    subject = mail.get('Subject')
+    name, prefixes = clean_subject(subject, [project.linkname])
+    version = parse_version(name, prefixes)
+
     refs = find_references(mail)
     h = clean_header(mail.get('Message-Id'))
     if h:
         refs = [h] + refs
+
     for ref in refs:
         try:
             series = SeriesReference.objects.get(
                 msgid=ref[:255], project=project).series
+
+            if series.version != version:
+                # if the versions don't match, at least make sure these were
+                # sent around the same time
+                date = find_date(mail)
+                delta = datetime.timedelta(minutes=SERIES_DELAY_INTERVAL)
+                start_date = date - delta
+                end_date = date + delta
+
+                # ...and if they don't, this probably isn't our series
+                if start_date > series.date > end_date:
+                    continue
+
             # we want to return a queryset like '_find_series_by_markers'
             return Series.objects.filter(id=series.id)
         except SeriesReference.DoesNotExist:
diff --git a/patchwork/tests/series/bugs-mixed-versions.mbox b/patchwork/tests/series/bugs-mixed-versions.mbox
new file mode 100644
index 0000000..1aa639b
--- /dev/null
+++ b/patchwork/tests/series/bugs-mixed-versions.mbox
@@ -0,0 +1,110 @@
+From stephenfinucane@gmail.com Sun Sep 11 23:22:13 2016
+Return-Path: <stephenfinucane@gmail.com>
+From: Stephen Finucane <stephenfinucane@gmail.com>
+To: stephenfinucane@hotmail.com
+Subject: [PATCH 1/2] test: Add some lorem ipsum
+Date: Sun, 11 Sep 2016 23:22:03 +0100
+Message-ID: <1473632524-8585-2-git-send-email-stephenfinucane@gmail.com>
+X-Mailer: git-send-email 2.7.4
+MIME-Version: 1.0
+Content-Type: text/plain
+Content-Length: 670
+Lines: 22
+
+From: Stephen Finucane <stephenfinucane@hotmail.com>
+
+---
+ test.txt | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+diff --git a/test.txt b/test.txt
+index f75ba05..a6c61c0 100644
+--- a/test.txt
++++ b/test.txt
+@@ -1 +1,8 @@
+ Hello, world.
++
++Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras eget eleifend
++augue. Nullam at metus venenatis, laoreet neque nec, convallis mauris.
++Pellentesque aliquam at nisi et laoreet. Duis non nisl venenatis, rhoncus risus
++id, elementum felis. In hac habitasse platea dictumst. Nam sit amet maximus
++eros. Nam quis ligula ut tortor egestas bibendum. Nunc sed purus sit amet
++tellus commodo bibendum ut vel dolor.
+-- 
+2.7.4
+
+
+From stephenfinucane@gmail.com Sun Sep 18 23:31:07 2016
+Return-Path: <stephenfinucane@gmail.com>
+From: Stephen Finucane <stephenfinucane@gmail.com>
+To: stephenfinucane@hotmail.com
+Subject: [PATCH v2 2/2] test: Convert to Markdown
+Date: Sun, 18 Sep 2016 23:30:55 +0100
+Message-ID: <1473633055-10316-3-git-send-email-stephenfinucane@gmail.com>
+X-Mailer: git-send-email 2.7.4
+In-Reply-To: <1473633055-10316-2-git-send-email-stephenfinucane@gmail.com>
+References: <1473633055-10316-2-git-send-email-stephenfinucane@gmail.com>
+MIME-Version: 1.0
+Content-Type: text/plain
+Content-Length: 2589
+Lines: 58
+
+From: Stephen Finucane <stephenfinucane@hotmail.com>
+
+---
+ test.md  | 17 +++++++++++++++++
+ test.txt | 17 -----------------
+ 2 files changed, 17 insertions(+), 17 deletions(-)
+ create mode 100644 test.md
+ delete mode 100644 test.txt
+
+diff --git a/test.md b/test.md
+new file mode 100644
+index 0000000..201bfe7
+--- /dev/null
++++ b/test.md
+@@ -0,0 +1,17 @@
++# Hello, world
++
++Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras eget eleifend
++augue. Nullam at metus venenatis, laoreet neque nec, convallis mauris.
++Pellentesque aliquam at nisi et laoreet. Duis non nisl venenatis, rhoncus risus
++id, elementum felis. In hac habitasse platea dictumst. Nam sit amet maximus
++eros. Nam quis ligula ut tortor egestas bibendum. Nunc sed purus sit amet
++tellus commodo bibendum ut vel dolor.
++
++Curabitur scelerisque tempus efficitur. Maecenas aliquet elementum quam, ac
++pharetra nisi gravida a. Nam vitae malesuada leo. Nam accumsan facilisis metus
++sed vulputate. Ut libero odio, tempor ac posuere vel, malesuada quis ex. Donec
++interdum ipsum et nibh molestie auctor eget in neque. Sed nec hendrerit enim.
++Etiam scelerisque non magna eu molestie. Maecenas dui quam, tempor quis ipsum
++eu, dapibus congue dui. Integer tincidunt accumsan tortor sed maximus. Praesent
++eu magna accumsan, consequat turpis quis, fringilla ante. Vestibulum nec
++maximus nulla. Donec vehicula nisl at pharetra eleifend.
+diff --git a/test.txt b/test.txt
+deleted file mode 100644
+index 4478ac2..0000000
+--- a/test.txt
++++ /dev/null
+@@ -1,17 +0,0 @@
+-Hello, world.
+-
+-Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras eget eleifend
+-augue. Nullam at metus venenatis, laoreet neque nec, convallis mauris.
+-Pellentesque aliquam at nisi et laoreet. Duis non nisl venenatis, rhoncus risus
+-id, elementum felis. In hac habitasse platea dictumst. Nam sit amet maximus
+-eros. Nam quis ligula ut tortor egestas bibendum. Nunc sed purus sit amet
+-tellus commodo bibendum ut vel dolor.
+-
+-Curabitur scelerisque tempus efficitur. Maecenas aliquet elementum quam, ac
+-pharetra nisi gravida a. Nam vitae malesuada leo. Nam accumsan facilisis metus
+-sed vulputate. Ut libero odio, tempor ac posuere vel, malesuada quis ex. Donec
+-interdum ipsum et nibh molestie auctor eget in neque. Sed nec hendrerit enim.
+-Etiam scelerisque non magna eu molestie. Maecenas dui quam, tempor quis ipsum
+-eu, dapibus congue dui. Integer tincidunt accumsan tortor sed maximus. Praesent
+-eu magna accumsan, consequat turpis quis, fringilla ante. Vestibulum nec
+-maximus nulla. Donec vehicula nisl at pharetra eleifend.
+-- 
+2.7.4
+
+
diff --git a/patchwork/tests/test_series.py b/patchwork/tests/test_series.py
index 295a049..2e86e47 100644
--- a/patchwork/tests/test_series.py
+++ b/patchwork/tests/test_series.py
@@ -538,6 +538,23 @@ class RevisedSeriesTest(_BaseTestCase):
 
         self.assertSerialized(patches, [1, 1, 1])
 
+    def test_mixed_versions(self):
+        """Series with a revision sent in reply to an incompleted series.
+
+        Parse a series with two patches, one of which has been lost or
+        miscategorized, followed by a second revision of the missing patch.
+        None of the patches of the second revision should be included in the
+        first revision.
+
+          - [PATCH 1/2] test: Add some lorem ipsum
+            - [PATCH v2 2/2] test: Convert to Markdown
+        """
+        _, patches, _ = self._parse_mbox(
+            'bugs-mixed-versions.mbox', [0, 2, 0],
+        )
+
+        self.assertSerialized(patches, [1, 1])
+
 
 class SeriesTotalTest(_BaseTestCase):
 
diff --git a/releasenotes/notes/issue-340-45deefed937b2090.yaml b/releasenotes/notes/issue-340-45deefed937b2090.yaml
new file mode 100644
index 0000000..150264a
--- /dev/null
+++ b/releasenotes/notes/issue-340-45deefed937b2090.yaml
@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    A bug that would result in patches from later series revisions being
+    included in earlier revisions has been resolved.