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dc_lot_t* dc_chatlist_get_summary(const dc_chatlist_t* chatlist, size_t index, dc_chat_t* chat /*may be NULL*/)
{
/* The summary is created by the chat, not by the last message.
This is because we may want to display drafts here or stuff as
"is typing".
Also, sth. as "No messages" would not work if the summary comes from a
message. */
dc_lot_t* ret = dc_lot_new(); /* the function never returns NULL */
uint32_t lastmsg_id = 0;
dc_msg_t* lastmsg = NULL;
dc_contact_t* lastcontact = NULL;
dc_chat_t* chat_to_delete = NULL;
if (chatlist==NULL || chatlist->magic!=DC_CHATLIST_MAGIC || index>=chatlist->cnt) {
ret->text2 = dc_strdup("ErrBadChatlistIndex");
goto cleanup;
}
lastmsg_id = dc_array_get_id(chatlist->chatNlastmsg_ids, index*DC_CHATLIST_IDS_PER_RESULT+1);
if (chat==NULL) {
chat = dc_chat_new(chatlist->context);
chat_to_delete = chat;
if (!dc_chat_load_from_db(chat, dc_array_get_id(chatlist->chatNlastmsg_ids, index*DC_CHATLIST_IDS_PER_RESULT))) {
ret->text2 = dc_strdup("ErrCannotReadChat");
goto cleanup;
}
}
if (lastmsg_id)
{
lastmsg = dc_msg_new_untyped(chatlist->context);
dc_msg_load_from_db(lastmsg, chatlist->context, lastmsg_id);
if (lastmsg->from_id!=DC_CONTACT_ID_SELF && DC_CHAT_TYPE_IS_MULTI(chat->type))
{
lastcontact = dc_contact_new(chatlist->context);
dc_contact_load_from_db(lastcontact, chatlist->context->sql, lastmsg->from_id);
}
}
if (chat->id==DC_CHAT_ID_ARCHIVED_LINK)
{
ret->text2 = dc_strdup(NULL);
}
else if (lastmsg==NULL || lastmsg->from_id==0)
{
/* no messages */
ret->text2 = dc_stock_str(chatlist->context, DC_STR_NOMESSAGES);
}
else
{
/* show the last message */
dc_lot_fill(ret, lastmsg, chat, lastcontact, chatlist->context);
}
cleanup:
dc_msg_unref(lastmsg);
dc_contact_unref(lastcontact);
dc_chat_unref(chat_to_delete);
return ret;
}
/**
* Helper function to get the associated context object.
*
* @memberof dc_chatlist_t
* @param chatlist The chatlist object to empty.
* @return Context object associated with the chatlist. NULL if none or on errors.
*/
dc_context_t* dc_chatlist_get_context(dc_chatlist_t* chatlist)
{
if (chatlist==NULL || chatlist->magic!=DC_CHATLIST_MAGIC) {
return NULL;
}
return chatlist->context;
}
static uint32_t get_last_deaddrop_fresh_msg(dc_context_t* context)
{
uint32_t ret = 0;
sqlite3_stmt* stmt = NULL;
stmt = dc_sqlite3_prepare(context->sql,
"SELECT m.id "
" FROM msgs m "
" LEFT JOIN chats c ON c.id=m.chat_id "
" WHERE m.state=" DC_STRINGIFY(DC_STATE_IN_FRESH)
" AND m.hidden=0 "
" AND c.blocked=" DC_STRINGIFY(DC_CHAT_DEADDROP_BLOCKED)
" ORDER BY m.timestamp DESC, m.id DESC;"); /* we have an index over the state-column, this should be sufficient as there are typically only few fresh messages */
if (sqlite3_step(stmt)!=SQLITE_ROW) {
goto cleanup;
}
ret = sqlite3_column_int(stmt, 0);