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RRTcodebaseC

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* the draft of the chat is set to a default text,
* the group has one member with the ID DC_CONTACT_ID_SELF
* and is in _unpromoted_ state.
* This means, you can add or remove members, change the name,
* the group image and so on without messages being sent to all group members.
*
* This changes as soon as the first message is sent to the group members
* and the group becomes _promoted_.
* After that, all changes are synced with all group members
* by sending status message.
*
* To check, if a chat is still unpromoted, you dc_chat_is_unpromoted().
* This may be useful if you want to show some help for just created groups.
*
* @memberof dc_context_t
* @param context The context as created by dc_context_new().
* @param verified If set to 1 the function creates a secure verified group.
* Only secure-verified members are allowed in these groups
* and end-to-end-encryption is always enabled.
* @param chat_name The name of the group chat to create.
* The name may be changed later using dc_set_chat_name().
* To find out the name of a group later, see dc_chat_get_name()
* @return The chat ID of the new group chat, 0 on errors.
*/
uint32_t dc_create_group_chat(dc_context_t* context, int verified, const char* chat_name)
{
uint32_t chat_id = 0;
char* draft_txt = NULL;
dc_msg_t* draft_msg = NULL;
char* grpid = NULL;
sqlite3_stmt* stmt = NULL;
if (context==NULL || context->magic!=DC_CONTEXT_MAGIC || chat_name==NULL || chat_name[0]==0) {
return 0;
}
draft_txt = dc_stock_str_repl_string(context, DC_STR_NEWGROUPDRAFT, chat_name);
grpid = dc_create_id();
stmt = dc_sqlite3_prepare(context->sql,
"INSERT INTO chats (type, name, grpid, param) VALUES(?, ?, ?, 'U=1');" /*U=DC_PARAM_UNPROMOTED*/);
sqlite3_bind_int (stmt, 1, verified? DC_CHAT_TYPE_VERIFIED_GROUP : DC_CHAT_TYPE_GROUP);
sqlite3_bind_text (stmt, 2, chat_name, -1, SQLITE_STATIC);
sqlite3_bind_text (stmt, 3, grpid, -1, SQLITE_STATIC);
if ( sqlite3_step(stmt)!=SQLITE_DONE) {
goto cleanup;
}
if ((chat_id=dc_sqlite3_get_rowid(context->sql, "chats", "grpid", grpid))==0) {
goto cleanup;
}
if (!dc_add_to_chat_contacts_table(context, chat_id, DC_CONTACT_ID_SELF)) {
goto cleanup;
}
draft_msg = dc_msg_new(context, DC_MSG_TEXT);
dc_msg_set_text(draft_msg, draft_txt);
set_draft_raw(context, chat_id, draft_msg);
cleanup:
sqlite3_finalize(stmt);
free(draft_txt);
dc_msg_unref(draft_msg);
free(grpid);
if (chat_id) {
context->cb(context, DC_EVENT_MSGS_CHANGED, 0, 0);
}
return chat_id;
}
/**
* Set group name.
*
* If the group is already _promoted_ (any message was sent to the group),
* all group members are informed by a special status message that is sent automatically by this function.
*
* Sends out #DC_EVENT_CHAT_MODIFIED and #DC_EVENT_MSGS_CHANGED if a status message was sent.
*
* @memberof dc_context_t
* @param chat_id The chat ID to set the name for. Must be a group chat.
* @param new_name New name of the group.
* @param context The context as created by dc_context_new().
* @return 1=success, 0=error
*/
int dc_set_chat_name(dc_context_t* context, uint32_t chat_id, const char* new_name)
{
/* the function only sets the names of group chats; normal chats get their names from the contacts */
int success = 0;
dc_chat_t* chat = dc_chat_new(context);
dc_msg_t* msg = dc_msg_new_untyped(context);
char* q3 = NULL;
if (context==NULL || context->magic!=DC_CONTEXT_MAGIC || new_name==NULL || new_name[0]==0 || chat_id<=DC_CHAT_ID_LAST_SPECIAL) {
goto cleanup;
}