158 lines
3.4 KiB
C++
158 lines
3.4 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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decltype(ircd::m::membership_positive)
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ircd::m::membership_positive
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{
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"join"_sv,
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"invite"_sv,
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};
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decltype(ircd::m::membership_negative)
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ircd::m::membership_negative
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{
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"leave"_sv,
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"ban"_sv,
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"knock"_sv,
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""_sv,
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};
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bool
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ircd::m::membership(const room &room,
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const user::id &user_id,
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const vector_view<const string_view> &membership)
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{
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const auto event_idx
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{
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room.get(std::nothrow, "m.room.member", user_id)
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};
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return m::membership(event_idx, membership);
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}
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bool
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ircd::m::membership(const event::idx &event_idx,
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const vector_view<const string_view> &membership)
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{
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bool ret;
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const auto closure
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{
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[&membership, &ret](const json::object &content)
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{
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const json::string &content_membership
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{
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content["membership"]
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};
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const auto it
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{
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std::find(begin(membership), end(membership), content_membership)
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};
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ret = content_membership && it != end(membership);
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}
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};
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// If the query was successful a membership state exists (even if the
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// string found was illegally empty) thus we must return the value of ret.
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if(m::get(std::nothrow, event_idx, "content", closure))
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return ret;
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// If the user included an empty string in the vector, they want us to
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// return true for non-membership (i.e a failed query).
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static const auto &empty{[](auto&& s) { return !s; }};
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if(std::any_of(begin(membership), end(membership), empty))
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return true;
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// If the membership vector itself was empty that's also a non-membership.
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if(membership.empty())
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return true;
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return false;
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}
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bool
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ircd::m::membership(const m::event &event,
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const vector_view<const string_view> &membership)
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{
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const auto matching
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{
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m::membership(event)
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};
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const auto it
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{
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std::find(begin(membership), end(membership), matching)
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};
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return it != end(membership);
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}
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ircd::string_view
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ircd::m::membership(const mutable_buffer &out,
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const room &room,
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const user::id &user_id)
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{
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const auto event_idx
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{
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room.get(std::nothrow, "m.room.member", user_id)
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};
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return m::membership(out, event_idx);
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}
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ircd::string_view
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ircd::m::membership(const mutable_buffer &out,
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const event::idx &event_idx)
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{
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return m::query(std::nothrow, event_idx, "content", [&out]
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(const json::object &content) -> string_view
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{
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const json::string &content_membership
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{
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content["membership"]
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};
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return strlcpy
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{
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out, content_membership
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};
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});
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}
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ircd::string_view
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ircd::m::membership(const event &event)
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{
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// The caller should check event type; empty is allowed if they only have content.
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assert(!json::get<"type"_>(event) || json::get<"type"_>(event) == "m.room.member");
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const auto &membership
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{
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json::get<"membership"_>(event)
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};
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if(likely(!membership))
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{
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const auto &content
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{
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json::get<"content"_>(event)
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};
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const json::string &membership
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{
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content.get("membership")
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};
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return membership;
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}
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return membership;
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}
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