[imp] IMP with dynamic is surprising users with how far delete goes

[francis picabia]

On Tue, Nov 8, 2011 at 9:22 AM, Ronan SALMON <rsalmon at mbpgroup.com> wrote:
>
> francis picabia <fpicabia at gmail.com> a écrit :
>
>> On Tue, Nov 8, 2011 at 1:45 AM, Michael M Slusarz <slusarz at horde.org>
>> wrote:
>>>
>>> Quoting francis picabia <fpicabia at gmail.com>:
>>>
>>>> At our site, we've had dynamic mail with IMP active for roughly 3 weeks.
>>>>
>>>> Today we have our second user to restore from backup after a user
>>>> "accidentally" deletes all of their email.  I had difficulty
>>>> understanding this until the second occurrence.
>>>>
>>>> In traditional mode, the email is displayed in pages. This is like
>>>> many online email services at hotmail, google mail, etc.
>>>>
>>>> Users are accustomed to selecting the upper check box to select
>>>> everything on the page (all viewable on the screen).  They select
>>>> delete, thinking it is only the messages they see at the time.  In
>>>> reality, it selected everything in their mailbox. They purged,
>>>> thinking it was only the messages in front of their eyeballs being
>>>> purged.  Of course, it deleted and purged everything in their mailbox.
>>>
>>> You're kidding me, right?  The dynamic view is exactly how every other UI
>>> handles a select all.  The traditional view is hamstrung by PHP/page
>>> architecture and it is the UI that is wrong.
>>>
>>> Regardless, the answer is easy.  Use a trash mailbox.
>>>
>>
>> It is no joke, there really are two users who deleted all their email.
>>  I'd assume they were more accustomed to the paged view in
>> traditional, also used in free webmail interfaces.  It is rather
>> alarming if you don't think this is a serious issue.
>>
>> We had used a trash in the past with cyrus and imp 3, and people would
>> fill up their quota with deleted mail they didn't know was there.
>>
>> How do I enable the trash?  Is this the same as Virtual Trash? I found
>> a checkbox to "Automatically create special mailboxes" in a UI part of
>> config and turned this on.  Deleted messages are not copied into my
>> trash.
>>
>> Also, does it have a way to automatically delete from trash after XX
>> number of days?
>
> You can configure (and maybe lock) a trash login task in
> imp/config/prefs.php

I found a bunch of settings in prefs.php which are inaccessible from
the Administration
interface, as far as I could tell.

I set the following value here to '1':

// should we move messages to a trash folder instead of just marking
// them as deleted?
$_prefs['use_trash'] = array(
    'value' => 1,
    'type' => 'checkbox',
    'desc' => _("When deleting messages, move them to your Trash
folder instead of marking them as deleted?")
);

I set the value here to '1':

// display the 'Empty Trash' link in the menubar?
$_prefs['empty_trash_menu'] = array(
    'value' => 1,
    'type' => 'checkbox',
    'desc' => _("Display the \"Empty Trash\" link in the menubar?")
);

The following setting wasn't documented in the prefs, but judging by
an old post related to IMP 3 or 4, the possible values are: yearly =
1, monthly = 2, weekly = 3, daily = 4, every login = 5 . I have no
idea if these are true, but I'm hoping so.  I selected monthly.

// how often to purge the Trash folder?
$_prefs['purge_trash_interval'] = array(
    'value' => 2,
    'type' => 'enum',
    'enum' => array_merge(array(0 => _("Never")),
Horde_LoginTasks::getLabels()),
    'desc' => _("Purge Trash how often:"),
    'help' => 'prefs-purge_trash_interval'
);

The trash solution seems to work well within dynamic.  I can't tell
yet if the purge setting is meaningful, so that is the only remaining
question I have.  Are those values for purge_trash_interval from older
IMP still used in IMP 5?

I think this solution is good.