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RRTcodebaseC

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* @private @memberof dc_chatlist_t
* @param chatlist The chatlist object to empty.
* @return None.
*/
void dc_chatlist_empty(dc_chatlist_t* chatlist)
{
if (chatlist==NULL || chatlist->magic!=DC_CHATLIST_MAGIC) {
return;
}
chatlist->cnt = 0;
dc_array_empty(chatlist->chatNlastmsg_ids);
}
/**
* Find out the number of chats in a chatlist.
*
* @memberof dc_chatlist_t
* @param chatlist The chatlist object as created eg. by dc_get_chatlist().
* @return Returns the number of items in a dc_chatlist_t object. 0 on errors or if the list is empty.
*/
size_t dc_chatlist_get_cnt(const dc_chatlist_t* chatlist)
{
if (chatlist==NULL || chatlist->magic!=DC_CHATLIST_MAGIC) {
return 0;
}
return chatlist->cnt;
}
/**
* Get a single chat ID of a chatlist.
*
* To get the message object from the message ID, use dc_get_chat().
*
* @memberof dc_chatlist_t
* @param chatlist The chatlist object as created eg. by dc_get_chatlist().
* @param index The index to get the chat ID for.
* @return Returns the chat_id of the item at the given index. Index must be between
* 0 and dc_chatlist_get_cnt()-1.
*/
uint32_t dc_chatlist_get_chat_id(const dc_chatlist_t* chatlist, size_t index)
{
if (chatlist==NULL || chatlist->magic!=DC_CHATLIST_MAGIC || chatlist->chatNlastmsg_ids==NULL || index>=chatlist->cnt) {
return 0;
}
return dc_array_get_id(chatlist->chatNlastmsg_ids, index*DC_CHATLIST_IDS_PER_RESULT);
}
/**
* Get a single message ID of a chatlist.
*
* To get the message object from the message ID, use dc_get_msg().
*
* @memberof dc_chatlist_t
* @param chatlist The chatlist object as created eg. by dc_get_chatlist().
* @param index The index to get the chat ID for.
* @return Returns the message_id of the item at the given index. Index must be between
* 0 and dc_chatlist_get_cnt()-1. If there is no message at the given index (eg. the chat may be empty), 0 is returned.
*/
uint32_t dc_chatlist_get_msg_id(const dc_chatlist_t* chatlist, size_t index)
{
if (chatlist==NULL || chatlist->magic!=DC_CHATLIST_MAGIC || chatlist->chatNlastmsg_ids==NULL || index>=chatlist->cnt) {
return 0;
}
return dc_array_get_id(chatlist->chatNlastmsg_ids, index*DC_CHATLIST_IDS_PER_RESULT+1);
}
/**
* Get a summary for a chatlist index.
*
* The summary is returned by a dc_lot_t object with the following fields:
*
* - dc_lot_t::text1: contains the username or the strings "Me", "Draft" and so on.
* The string may be colored by having a look at text1_meaning.
* If there is no such name or it should not be displayed, the element is NULL.
*
* - dc_lot_t::text1_meaning: one of DC_TEXT1_USERNAME, DC_TEXT1_SELF or DC_TEXT1_DRAFT.
* Typically used to show dc_lot_t::text1 with different colors. 0 if not applicable.
*
* - dc_lot_t::text2: contains an excerpt of the message text or strings as
* "No messages". May be NULL of there is no such text (eg. for the archive link)
*
* - dc_lot_t::timestamp: the timestamp of the message. 0 if not applicable.
*
* - dc_lot_t::state: The state of the message as one of the DC_STATE_* constants (see #dc_msg_get_state()). 0 if not applicable.
*
* @memberof dc_chatlist_t
* @param chatlist The chatlist to query as returned eg. from dc_get_chatlist().
* @param index The index to query in the chatlist.
* @param chat To speed up things, pass an already available chat object here.
* If the chat object is not yet available, it is faster to pass NULL.
* @return The summary as an dc_lot_t object. Must be freed using dc_lot_unref(). NULL is never returned.
*/