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module;
#include <boost/geometry.hpp>
#include <boost/json.hpp>
module routemon:api$impl;
import std;
import :api;
import :datex2;
import :geo;
import :gpx;
import :log;
import :req_ctx;
import :time;
import :trace;
namespace {
namespace chrono = std::chrono;
namespace json = boost::json;
namespace views = std::views;
} // namespace
namespace routemon::api {
auto json_value_from_point(geo::point const& p) -> json::value
{
return json::array{bgeo::get<1>(p), bgeo::get<0>(p)};
}
auto json_value_from_linestring(geo::linestring const& ls) -> json::value
{
json::array a;
for (auto const& p : ls)
a.push_back(json_value_from_point(p));
return a;
}
auto json_value_from_linestrings(std::vector<geo::linestring> const& lss)
-> json::value
{
json::array a;
for (auto const& ls : lss)
a.push_back(json_value_from_linestring(ls));
return a;
}
auto tag_invoke(
json::value_from_tag, json::value& jv, relevant_road_closure const& clo)
-> void
{
jv = json::object{
{"relevant_lss", json_value_from_linestrings(clo.relevant_lss)},
};
}
auto tag_invoke(
json::value_from_tag, json::value& jv, relevant_situation const& sit) -> void
{
jv = json::object{
{"id", json::value_from(sit.id)},
{"location", sit.location ? json_value_from_point(*sit.location) : nullptr},
{"comments", json::value_from(sit.comments)},
{"relevant_road_closures", json::value_from(sit.relevant_road_closures)},
};
}
auto tag_invoke(json::value_from_tag, json::value& jv, track_segment const& seg)
-> void
{
jv = json::object{
{"points", json_value_from_linestring(seg.points)},
};
}
auto tag_invoke(json::value_from_tag, json::value& jv, track const& track)
-> void
{
jv = json::object{
{"segments", json::value_from(track.segments)},
};
}
auto tag_invoke(
json::value_from_tag, json::value& jv, process_gpx_result const& res) -> void
{
jv = json::object{
{"tracks", json::value_from(res.tracks)},
{"relevant_situations", json::value_from(res.relevant_situations)},
};
}
auto tag_invoke(json::value_from_tag, json::value& jv, sysinfo const& info)
-> void
{
jv = json::object{
{"using_publication_of",
std::format("{:%FT%TZ}", info.using_publication_of)},
};
}
handler::handler(log::logger const& l, datex2::situation_publication pub)
: l_{l.sub("handler")}, pub_{std::move(pub)}
{
l_.info("Building indices");
auto const before_build = chrono::steady_clock::now();
for (auto const& sit : pub_.situations)
{
for (auto const& rc : sit->road_closures)
{
for (auto const& ls : rc->relevant_line_strings)
{
auto box = geo::box{};
bgeo::envelope(*ls, box);
lse_index_.insert(std::make_tuple(box, ls, rc));
}
for (auto p : rc->relevant_points)
{
p_index_.insert(std::make_pair(p, rc));
}
}
}
auto const after_build = chrono::steady_clock::now();
auto const dur_build =
chrono::duration_cast<chrono::milliseconds>(after_build - before_build);
l_.info("Indices built in {}", dur_build);
l_.info("LSE index size: {}", lse_index_.size());
l_.info("Point index size: {}", p_index_.size());
}
auto handler::process_gpx(gpx::file&& gpx_file)
-> std::optional<process_gpx_result>
{
auto const now = chrono::utc_clock::now();
auto const relevant = std::initializer_list<time::period>{
time::period{now - chrono::days(7), now + chrono::days(7)}
};
auto const check_periods = time::period_seq{relevant.begin(), relevant.end()};
auto splits_with_overlap_segments = std::vector<geo::linestring>{};
for (auto const& track : gpx_file.tracks)
for (auto const& seg : track.segments)
geo::split_linestring_with_overlap_segments(
seg.waypoints,
5000 /* meters max total dist until a new split is forced */,
splits_with_overlap_segments);
auto const before_query = chrono::steady_clock::now();
l_.debug("Querying for relevant situations");
auto relevant_road_closures =
std::unordered_set<std::shared_ptr<datex2::road_closure>>{};
auto ls_checked = 0uz;
auto p_checked = 0uz;
auto i = 0;
for (geo::linestring const& part : splits_with_overlap_segments)
{
l_.debug("Checking part [{}/{}]", ++i, splits_with_overlap_segments.size());
auto part_box = geo::box{};
bgeo::envelope(part, part_box);
for (auto it = lse_index_.qbegin(bgeo::index::intersects(part_box));
it != lse_index_.qend(); it++)
{
// Cannot use structured bindings here, as boost::geometry::get
// interferes with ADL. It is a candidate as the namespace
// boost::geometry is part of the associated namespace set, which
// happens because geo::linestring ≡
// boost::geometry::model::linestring<geo::point> is part of the
// whole tuple type (lse_index_value) that is the value_type of the
// iterator.
std::shared_ptr<geo::linestring> const& ls = std::get<1>(*it);
std::shared_ptr<datex2::road_closure> const& rc = std::get<2>(*it);
if (rc->validity
&& rc->validity->intersect(check_periods).periods().empty())
continue;
if (bgeo::distance(*ls, part, geo::vincenty_strategy{}) < 5.0)
relevant_road_closures.emplace(rc);
ls_checked++;
}
for (auto it = p_index_.qbegin(bgeo::index::intersects(part_box));
it != p_index_.qend(); it++)
{
// Cannot use structured bindings here for the same reason as above.
geo::point const& p = std::get<0>(*it);
std::shared_ptr<datex2::road_closure> const& rc = std::get<1>(*it);
if (rc->validity
&& rc->validity->intersect(check_periods).periods().empty())
continue;
if (bgeo::distance(p, part, geo::vincenty_strategy{}) < 5.0)
relevant_road_closures.emplace(rc);
p_checked++;
}
}
auto const after_query = chrono::steady_clock::now();
l_.debug(
"Done (checked {} line string(s) and {} point(s)) in {}", ls_checked,
p_checked,
chrono::duration_cast<chrono::milliseconds>(after_query - before_query));
auto relevant_situations =
std::unordered_set<std::shared_ptr<datex2::situation>>{};
for (auto const& rc : relevant_road_closures)
relevant_situations.emplace(rc->parent);
l_.debug(
"Identified {} relevant road closure(s), part of {} unique "
"situation(s)",
relevant_road_closures.size(), relevant_situations.size());
for (auto const& sit : relevant_situations)
l_.debug("Relevant situation: {}", sit->id);
return process_gpx_result{
.tracks = gpx_file.tracks
| views::transform(
[](auto const& trk) -> track
{
return {
.segments = trk.segments
| views::transform(
[](auto const& seg) -> track_segment
{ return {.points = seg.waypoints}; })
| std::ranges::to<std::vector<track_segment>>(),
};
})
| std::ranges::to<std::vector<track>>(),
.relevant_situations =
relevant_situations
| views::transform(
[&](std::shared_ptr<datex2::situation> sit) -> relevant_situation
{
return {
.id = sit->id,
.location = sit->location,
.comments = sit->comments,
.relevant_road_closures =
relevant_road_closures
| views::filter(
[&](std::shared_ptr<datex2::road_closure> const& rc) -> bool
{ return std::shared_ptr{rc->parent} == sit; })
| views::transform(
[](std::shared_ptr<datex2::road_closure> const& rc)
-> relevant_road_closure
{
return {
.relevant_lss =
rc->relevant_line_strings
| views::transform(
[](auto const& lsp) -> geo::linestring { return *lsp; })
| std::ranges::to<std::vector<geo::linestring>>(),
};
})
| std::ranges::to<std::vector<relevant_road_closure>>(),
};
})
| std::ranges::to<std::vector<relevant_situation>>(),
};
}
auto handler::sysinfo() -> struct sysinfo
{
return {.using_publication_of = pub_.publication_time};
}
} // namespace routemon::api
|
