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modules/client/rooms/messages: json::stack retrofit.

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This commit is contained in:
Jason Volk 2018-04-04 18:34:52 -07:00
parent ca75899407
commit 7fef6f5f10
1 changed files with 55 additions and 39 deletions
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94
modules/client/rooms/messages.cc
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@ -42,56 +42,72 @@ get__messages(client &client,
room_id
};
m::event::id::buf start, end;
std::vector<json::value> ret;
ret.reserve(page.limit);
m::room::messages it
{
room, page.from
};
// Spec sez the 'from' token is exclusive
if(it && page.dir == 'b')
--it;
else if(it)
++it;
for(; it; page.dir == 'b'? --it : ++it)
//TODO: chunk directly to socket
const unique_buffer<mutable_buffer> buf
{
const m::event &event{*it};
if(page.to && at<"event_id"_>(event) == page.to)
{
if(page.dir != 'b')
start = at<"event_id"_>(event);
break;
}
ret.emplace_back(event);
if(ret.size() >= page.limit)
{
if(page.dir == 'b')
end = at<"event_id"_>(event);
else
start = at<"event_id"_>(event);
break;
}
}
const json::value chunk
{
ret.data(), ret.size()
(1 + page.limit) * m::event::MAX_SIZE //TODO: XXX
};
json::stack out{buf};
{
json::stack::object ret{out};
// Spec sez the 'from' token is exclusive
if(it && page.dir == 'b')
--it;
else if(it)
++it;
size_t count{0};
m::event::id::buf start, end;
{
json::stack::member chunk{ret, "chunk"};
json::stack::array messages{chunk};
for(; it; page.dir == 'b'? --it : ++it)
{
const m::event &event{*it};
if(page.to && at<"event_id"_>(event) == page.to)
{
if(page.dir != 'b')
start = at<"event_id"_>(event);
break;
}
messages.append(event);
if(++count >= page.limit)
{
if(page.dir == 'b')
end = at<"event_id"_>(event);
else
start = at<"event_id"_>(event);
break;
}
}
}
json::stack::member
{
ret, "start", json::value{start}
};
json::stack::member
{
ret, "end", json::value{end}
};
}
return resource::response
{
client, json::members
client, json::object
{
{ "start", start },
{ "end", end },
{ "chunk", chunk },
out.completed()
}
};
}