mirror of
https://github.com/matrix-construct/construct
synced 2024-08-26 03:15:17 +02:00
156 lines
2.6 KiB
C++
156 lines
2.6 KiB
C++
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// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2019 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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#include "rooms.h"
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using namespace ircd;
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resource::response
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get__relations(client &client,
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const resource::request &request,
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const m::room::id &room_id)
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{
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if(!m::exists(room_id))
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throw m::NOT_FOUND
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{
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"Cannot take a report about %s which is not found.",
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string_view{room_id}
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};
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if(request.parv.size() < 3)
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throw m::NEED_MORE_PARAMS
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{
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"event_id path parameter required"
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};
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m::event::id::buf event_id
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{
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url::decode(event_id, request.parv[2])
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};
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if(!m::exists(event_id))
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throw m::NOT_FOUND
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{
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"Cannot get relations about %s which is not found.",
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string_view{event_id}
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};
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if(request.parv.size() < 4)
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throw m::NEED_MORE_PARAMS
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{
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"relation first path parameter required"
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};
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if(request.parv.size() < 5)
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throw m::NEED_MORE_PARAMS
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{
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"relation second path parameter required"
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};
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char rbuf[2][256];
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const string_view r[2]
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{
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url::decode(rbuf[0], request.parv[3]),
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url::decode(rbuf[1], request.parv[4]),
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};
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const unique_buffer<mutable_buffer> buf
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{
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96_KiB
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};
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json::stack out{buf};
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json::stack::object top
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{
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out
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};
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m::event::idx next_idx
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{
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index(event_id, std::nothrow)
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};
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json::stack::array chunk
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{
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top, "chunk"
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};
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const m::event::fetch event
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{
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next_idx, std::nothrow
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};
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if(event.valid)
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chunk.append(event);
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const auto each_ref{[&r, &next_idx, &chunk]
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(const m::event::idx &event_idx, const m::dbs::ref &)
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{
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const m::event::fetch event
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{
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event_idx, std::nothrow
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};
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if(!event.valid)
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return true;
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const json::object &m_relates_to
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{
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json::get<"content"_>(event).get("m.relates_to")
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};
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const json::string &rel_type
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{
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m_relates_to.get("rel_type")
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};
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if(rel_type != r[0])
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return true;
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chunk.append(event);
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next_idx = event_idx;
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return false;
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}};
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while(next_idx) try
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{
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const m::event::refs refs
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{
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next_idx
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};
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if(refs.for_each(m::dbs::ref::M_RELATES, each_ref))
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break;
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}
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catch(const std::exception &e)
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{
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log::error
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{
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m::log, "relation trace from %s on %ld :%s",
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string_view{event_id},
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next_idx,
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e.what()
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};
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break;
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}
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chunk.~array();
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top.~object();
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return resource::response
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{
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client, json::object
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{
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out.completed()
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}
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};
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}
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