[Tickets #12139] Re: Sort by message date broken starting with horde_imap_client 2.7.0

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Ticket URL: http://bugs.horde.org/ticket/12139
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  Ticket             | 12139
  Updated By         | Michael Slusarz <slusarz at horde.org>
  Summary            | Sort by message date broken starting with
                     | horde_imap_client 2.7.0
  Queue              | Horde Framework Packages
  Version            | Git master
  Type               | Bug
  State              | Feedback
  Priority           | 1. Low
  Milestone          |
  Patch              |
  Owners             |
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Michael Slusarz <slusarz at horde.org> (2013-03-26 16:38) wrote:

> One more thing.  I see this behavior in both Traditional (basic) and  
> Dynamic modes.  You said that the problem in IMP was limited to  
> dynamic I think.

It doesn't happen in basic mode since there is no mechanism to  
explicitly change the Date sort - it ALWAYS uses the 'datesort'  
preference.

Since the datesort preference defaults to sequence (pre-6.0.4:  
arrival, which is slightly different), basic view out-of-the-box will  
NEVER display messages in date *display* order (i.e. the dates that  
are actually displayed on the screen).  Sequence sort can appear to  
not be sorted because it is not using those display dates - it is  
using the order the messages were added to the mailbox.

Message date sorting is a totally different sort type - and is  
disfavored because it can be expensive to determine since all message  
headers must be parsed.