For hidden messages, blobs are not deleted during housekeeping. To
actually free the space used by media files, messages should be moved to
trash instead of being hidden.
Now there is only one function: hide_device_expired_messages().
If any messages are hidden event DC_EVENT_MSGS_CHANGED(0,0) is emitted
now, which is more correct than DC_EVENT_CHAT_MODIFIED and also triggers
chatlist reload.
this reverts the logical changes done in #811
but keeps the improvements done later eg. in #911.
the reason for the revert is that it is too hard to
find a started draft in a larget chatlist.
also the shown date would not be just descending.
resorting the chatlist on changing drafts has some ux issues.
eg. when the chatlist is visible together with the input field,
if may come to flickering resorting during input
or to a resorting just when the user leave the chat
as this might trigger set_draft().
but also on mobiles, the resorting is visible and a bit unexpected.
also it is unclear what happens when a chat with a draft is entered
and left without modifications.
the solution proposed here is to ignore draft on sorting
while still showing them in the chatlist
if they're newer as the last message.
a possible disadvantage is
that the date for the chat with a draft does not follow the ordering
(the ordering is by the last message),
however, the date is not shown as a "primary sort" criterion or so,
so it might be that this is completely okay.
also, of course, it affects only draft :)
the point of this pr is to get an overview
how and where DC_CONTACT_ID_DEVICE is used,
to prepare introducing a device-"chat".
i did not change the sql statements for now
as this would require some more refactoring
and has the potential to introduce bugs.
the error led to unusable contact requests,
at least on android and ios (probably also desktop)
because msg_id=dc_chatlist_get_msg_id() always returns 0
and create_chat_by_msg_id(msg_id)
or dc_marknoticed_contact(<get sender from msg_id>)
failed therefore.
This more strongly types the ubiquitous message id type by no longer
making it an integer. It keeps the actual ID opaque. Only for the
generic job API the number keeps being used. Some locations also need
to create it from an integer and call MsgId::new().
contact-requests of non-blocked senders are shown in the chatlist,
so that the user gets aware of them without opening the contact-request-chat.
however, for that, the contact-request virtual-chat-id
must be added to the beginning of the list,
otherwise it won't get noticed by the user.
Function `query_row` executes query and calls callback function to process
row returned. Function query_row_col() is special case, that provides
callback function, which returns value of one particular column of row,
ignoring others.
In all cases, that particular column was 0 (first and only column of
query result), since there is no point to select more than one column
with this function -- they are discarded anyway.
This commit removes that redundancy, removing column number argument of
query_row_col() function and adjusting call sites accordingly.
