mirror of
https://github.com/matrix-construct/construct
synced 2024-09-08 09:45:41 +02:00
256 lines
5.3 KiB
C++
256 lines
5.3 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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#include "rooms.h"
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using namespace ircd;
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m::resource::response
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get__members(client &client,
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const m::resource::request &request,
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const m::room::id &room_id)
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{
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// Acquire the membership/not_membership constraints from query string
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char membuf[2][4][32];
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string_view memship[2][4];
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const size_t memcount[2]
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{
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request.query.count("not_membership"),
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request.query.count("membership")
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};
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for(size_t i(0); i < 4 && i < memcount[0]; ++i)
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memship[0][i] = url::decode(membuf[0][i], request.query.at("not_membership", i));
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for(size_t i(0); i < 4 && i < memcount[1]; ++i)
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memship[1][i] = url::decode(membuf[1][i], request.query.at("membership", i));
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// List of membership strings user does not want in response.
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const vector_view<const string_view> not_memberships
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{
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memship[0], memcount[0]
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};
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// List of membership strings user wants in response
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const vector_view<const string_view> memberships
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{
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memship[1], memcount[1]
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};
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// Acquire the at/since parameter from query string.
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char atbuf[64];
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const string_view at
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{
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url::decode(atbuf, request.query["at"])
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};
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// at is a /sync since token we gave the client. This is simply
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// an event_idx sequence integer, except during phased-polylog sync
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// when this is a negative integer. If this is phased sync, we can
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// parse this token for the snapshot integer.
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const auto &[since, snapshot, flags]
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{
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m::sync::make_since(at)
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};
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const auto &at_idx
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{
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snapshot?:
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since?:
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-1UL
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};
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const m::room room
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{
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room_id
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};
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if(!exists(room))
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throw m::NOT_FOUND
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{
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"Room %s does not exist.",
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string_view{room_id}
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};
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if(!visible(room, request.user_id))
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throw m::ACCESS_DENIED
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{
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"You do not have permission to view %s members.",
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string_view{room_id}
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};
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m::resource::response::chunked response
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{
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client, http::OK
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};
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json::stack out
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{
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response.buf, response.flusher()
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};
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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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json::stack::array chunk
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{
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top, "chunk"
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};
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const m::room::members members
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{
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room
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};
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// The room::members interface can perform an optimized iteration if we
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// supply a single membership type; otherwise all memberships iterated.
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const string_view &membership
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{
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// A single membership entry is given in the query string
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memberships.size() == 1?
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memberships.at(0):
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string_view{}
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};
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// Tests if a member matches all of the membership constraint params. Used
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// in the members iteration closures below. Note that if a membership
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// parameter was passed to for_each() all members are of that membership,
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// and that membership is desired, so we don't have to run any match here.
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const auto membership_match{[&memberships, ¬_memberships]
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(const m::event &event)
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{
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if(likely(!empty(not_memberships)))
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{
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if(m::membership(event, not_memberships))
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return false;
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}
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else if(likely(!empty(memberships)))
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{
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if(!m::membership(event, memberships))
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return false;
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}
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return true;
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}};
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// prefetch loop
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members.for_each(membership, [&membership, &membership_match, &at_idx]
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(const m::user::id &member, const m::event::idx &event_idx)
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{
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if(event_idx > at_idx)
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return true;
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// Prefetch the event JSON
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m::prefetch(event_idx);
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return true;
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});
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// stream to client
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m::event::fetch event;
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members.for_each(membership, [&membership, &membership_match, &at_idx, &chunk, &event]
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(const m::user::id &member, const m::event::idx &event_idx)
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{
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if(event_idx > at_idx)
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return true;
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if(!seek(std::nothrow, event, event_idx))
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return true;
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if(!membership && !membership_match(event))
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return true;
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chunk.append(event);
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return true;
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});
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return std::move(response);
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}
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m::resource::response
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get__joined_members(client &client,
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const m::resource::request &request,
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const m::room::id &room_id)
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{
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const m::room room
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{
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room_id
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};
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if(!exists(room))
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throw m::NOT_FOUND
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{
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"Room %s does not exist.",
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string_view{room_id}
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};
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if(!visible(room, request.user_id))
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throw m::ACCESS_DENIED
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{
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"You do not have permission to view %s joined members.",
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string_view{room_id}
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};
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m::resource::response::chunked response
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{
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client, http::OK
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};
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json::stack out
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{
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response.buf, response.flusher()
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};
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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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json::stack::object joined
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{
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top, "joined"
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};
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const m::room::members members
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{
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room
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};
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members.for_each("join", []
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(const m::user::id &user_id, const m::event::idx &event_idx)
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{
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m::prefetch(event_idx);
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return true;
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});
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members.for_each("join", [&joined, &room]
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(const m::user::id &user_id, const m::event::idx &event_idx)
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{
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json::stack::object room_member
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{
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joined, user_id
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};
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m::get(std::nothrow, event_idx, "content", [&room_member]
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(const json::object &content)
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{
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for(const auto &[key, val] : content)
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json::stack::member
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{
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room_member, key, val
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};
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});
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return true;
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});
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return std::move(response);
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}
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