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Viewing changes to grackle/model.py

  • Committer: William Grant
  • Date: 2012-01-22 12:46:24 UTC
  • Revision ID: william.grant@canonical.com-20120122124624-of899x94i30q946p
Do backward correctly.

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grackle/model.py
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            'message-id': message.get('message-id'),
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            }
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    def get_messages(self, archive_uuid, order, count, memo):
 
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    def _trim(self, sequence, end):
 
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        if end:
 
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            return sequence[:-1]
 
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        else:
 
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            return sequence[1:]
 
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    def get_messages(self, archive_uuid, order, count, memo, backward=False):
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        if order in ("date", "-date"):
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            reversed = order[0] == '-'
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        else:
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        # Get up to n+1 messages from the memo: the last item of the
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        # previous batch (because that's where the memo starts) + this
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        # batch.
 
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        if backward:
 
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            start = ''
 
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            finish = memo
 
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        else:
 
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            start = memo
 
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            finish = ''
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        pairs = self.archive_messages.get(
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            archive_uuid, column_count=count + 1,
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            column_start=memo, column_reversed=reversed).items()
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            archive_uuid, column_count=count + 1, column_start=start,
 
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            column_finish=finish, column_reversed=reversed).items()
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        if memo and len(pairs) and pairs[0][0] <= memo:
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            pairs = pairs[1:]
 
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            pairs = self._trim(pairs, False ^ backward)
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        elif len(pairs) > count:
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            pairs = pairs[:-1]
 
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            pairs = self._trim(pairs, True ^ backward)
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        if len(pairs) == 0:
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            return (None, [], None)