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add search box to filter addresses quickly

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setop 2022-01-29 17:30:16 +01:00 committed by Thomas Citharel
parent 4f92add78d
commit 38579d9dc2
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1 changed files with 15 additions and 3 deletions
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18
lib/mobilizon/events/events.ex
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@ -1330,12 +1330,15 @@ defmodule Mobilizon.Events do
defp events_for_location(query, %{location: location, radius: radius})
when is_valid_string(location) and not is_nil(radius) do
with {lon, lat} <- Geohax.decode(location),
point <- Geo.WKT.decode!("SRID=4326;POINT(#{lon} #{lat})") do
point <- Geo.WKT.decode!("SRID=4326;POINT(#{lon} #{lat})"),
{{x_min, y_min}, {x_max, y_max}} <- search_box({lon, lat}, radius) do
query
|> join(:inner, [q], a in Address, on: a.id == q.physical_address_id, as: :address)
|> where(
[q],
st_dwithin_in_meters(^point, as(:address).geom, ^(radius * 1000))
[q, ..., a],
st_x(a.geom) > ^x_min and st_x(a.geom) < ^x_max and
st_y(a.geom) > ^y_min and st_y(a.geom) < ^y_max and
st_dwithin_in_meters(^point, a.geom, ^(radius * 1000))
)
else
_ -> query
@ -1344,6 +1347,15 @@ defmodule Mobilizon.Events do
defp events_for_location(query, _args), do: query
@spec search_box({float(), float()}, float()) :: {{float, float}, {float, float}}
defp search_box({lon0, lat0}, radius) do
km_per_lat_deg = 111.195
lat_amp = radius / km_per_lat_deg
km_per_lon_deg_at_lat = Haversine.distance({0.0, lat0}, {1.0, lat0}) / 1000
lon_amp = radius / km_per_lon_deg_at_lat
{{lon0 - lon_amp, lat0 - lat_amp}, {lon0 + lon_amp, lat0 + lat_amp}}
end
@spec filter_online(Ecto.Query.t(), map()) :: Ecto.Query.t()
defp filter_online(query, %{type: :online}), do: is_online_fragment(query, true)