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aandvalenzuela
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RRTcodebaseC

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* If a new chat is created, the given message ID is moved to this chat, however,
* there may be more messages moved to the chat from the deaddrop. To get the
* chat messages, use dc_get_chat_msgs().
*
* If the user is asked before creation, he should be
* asked whether he wants to chat with the _contact_ belonging to the message;
* the group names may be really weird when taken from the subject of implicit
* groups and this may look confusing.
*
* Moreover, this function also scales up the origin of the contact belonging
* to the message and, depending on the contacts origin, messages from the
* same group may be shown or not - so, all in all, it is fine to show the
* contact name only.
*
* @memberof dc_context_t
* @param context The context object as returned from dc_context_new().
* @param msg_id The message ID to create the chat for.
* @return The created or reused chat ID on success. 0 on errors.
*/
uint32_t dc_create_chat_by_msg_id(dc_context_t* context, uint32_t msg_id)
{
uint32_t chat_id = 0;
int send_event = 0;
dc_msg_t* msg = dc_msg_new_untyped(context);
dc_chat_t* chat = dc_chat_new(context);
if (context==NULL || context->magic!=DC_CONTEXT_MAGIC) {
goto cleanup;
}
if (!dc_msg_load_from_db(msg, context, msg_id)
|| !dc_chat_load_from_db(chat, msg->chat_id)
|| chat->id<=DC_CHAT_ID_LAST_SPECIAL) {
goto cleanup;
}
chat_id = chat->id;
if (chat->blocked) {
dc_unblock_chat(context, chat->id);
send_event = 1;
}
dc_scaleup_contact_origin(context, msg->from_id, DC_ORIGIN_CREATE_CHAT);
cleanup:
dc_msg_unref(msg);
dc_chat_unref(chat);
if (send_event) {
context->cb(context, DC_EVENT_MSGS_CHANGED, 0, 0);
}
return chat_id;
}
/**
* Returns all message IDs of the given types in a chat.
* Typically used to show a gallery.
* The result must be dc_array_unref()'d
*
* The list is already sorted and starts with the oldest message.
* Clients should not try to re-sort the list as this would be an expensive action
* and would result in inconsistencies between clients.
*
* @memberof dc_context_t
* @param context The context object as returned from dc_context_new().
* @param chat_id The chat ID to get all messages with media from.
* @param msg_type Specify a message type to query here, one of the DC_MSG_* constats.
* @param msg_type2 Alternative message type to search for. 0 to skip.
* @param msg_type3 Alternative message type to search for. 0 to skip.
* @return An array with messages from the given chat ID that have the wanted message types.
*/
dc_array_t* dc_get_chat_media(dc_context_t* context, uint32_t chat_id,
int msg_type, int msg_type2, int msg_type3)
{
if (context==NULL || context->magic!=DC_CONTEXT_MAGIC) {
return NULL;
}
dc_array_t* ret = dc_array_new(context, 100);
sqlite3_stmt* stmt = dc_sqlite3_prepare(context->sql,
"SELECT id FROM msgs WHERE chat_id=? AND (type=? OR type=? OR type=?) ORDER BY timestamp, id;");
sqlite3_bind_int(stmt, 1, chat_id);
sqlite3_bind_int(stmt, 2, msg_type);
sqlite3_bind_int(stmt, 3, msg_type2>0? msg_type2 : msg_type);
sqlite3_bind_int(stmt, 4, msg_type3>0? msg_type3 : msg_type);
while (sqlite3_step(stmt)==SQLITE_ROW) {
dc_array_add_id(ret, sqlite3_column_int(stmt, 0));
}
sqlite3_finalize(stmt);
return ret;
}
/**
* Search next/previous message based on a given message and a list of types.
* The
* Typically used to implement the "next" and "previous" buttons