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construct/include/ircd/m/id.h
2017-08-23 15:10:28 -06:00

102 lines
2.7 KiB
C++

/*
* charybdis: 21st Century IRC++d
*
* Copyright (C) 2016 Charybdis Development Team
* Copyright (C) 2016 Jason Volk <jason@zemos.net>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice is present in all copies.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
#pragma once
#define HAVE_IRCD_M_ID_H
namespace ircd {
namespace m {
const size_t USER_ID_BUFSIZE = 256;
const size_t ACCESS_TOKEN_BUFSIZE = 256;
inline bool
username_valid(const string_view &username)
{
return true;
}
inline bool
mxid_valid(const string_view &mxid)
{
const auto userhost(split(mxid, ':'));
const auto &user(userhost.first);
const auto &host(userhost.second);
if(user.empty() || host.empty())
return false;
if(!startswith(user, '@') || user.size() == 1)
return false;
return true;
}
inline string_view
username_generate(char *const &buf,
const size_t &max)
{
const uint32_t num(rand() % 100000U);
const size_t len(snprintf(buf, max, "@guest%u", num));
return { buf, len };
}
inline string_view
access_token_generate(char *const &buf,
const size_t &max)
{
const int num[] { rand(), rand(), rand() };
const size_t len(snprintf(buf, max, "charybdis%d%d%d", num[0], num[1], num[2]));
return { buf, len };
}
struct id
{
string_view user;
string_view host;
template<size_t size>
id(string_view user, string_view host)
:user{std::move(user)}
,host{std::move(host)}
{}
id(const string_view &user, const string_view &host, char *const &buf, const size_t &max)
:user{user}
,host{host}
{
char gen_buf[USER_ID_BUFSIZE];
fmt::snprintf(buf, max, "%s%s:%s",
user.empty() || startswith(user, '@')? "" : "@",
!user.empty()? user : username_generate(gen_buf, sizeof(gen_buf)),
host);
}
template<size_t size>
id(const string_view &user, const string_view &host, char (&buf)[size])
:id{user, host, buf, size}
{}
};
} // namespace m
} // namespace ircd