95 lines
2.8 KiB
Elixir
95 lines
2.8 KiB
Elixir
defmodule Mobilizon.Service.Geospatial.Photon do
|
|
@moduledoc """
|
|
[Photon](https://photon.komoot.de) backend.
|
|
"""
|
|
|
|
alias Mobilizon.Addresses.Address
|
|
alias Mobilizon.Service.Geospatial.Provider
|
|
alias Mobilizon.Service.HTTP.GeospatialClient
|
|
import Mobilizon.Service.Geospatial.Provider, only: [endpoint: 1]
|
|
require Logger
|
|
|
|
@behaviour Provider
|
|
|
|
@impl Provider
|
|
@doc """
|
|
Photon implementation for `c:Mobilizon.Service.Geospatial.Provider.geocode/3`.
|
|
|
|
Note: It seems results are quite wrong.
|
|
"""
|
|
@spec geocode(number(), number(), keyword()) :: list(Address.t())
|
|
def geocode(lon, lat, options \\ []) do
|
|
:geocode
|
|
|> build_url(%{lon: lon, lat: lat}, options)
|
|
|> fetch_features
|
|
end
|
|
|
|
@impl Provider
|
|
@doc """
|
|
Photon implementation for `c:Mobilizon.Service.Geospatial.Provider.search/2`.
|
|
"""
|
|
@spec search(String.t(), keyword()) :: list(Address.t())
|
|
def search(q, options \\ []) do
|
|
:search
|
|
|> build_url(%{q: q}, options)
|
|
|> fetch_features
|
|
end
|
|
|
|
@spec build_url(atom(), map(), list()) :: String.t()
|
|
defp build_url(method, args, options) do
|
|
limit = Keyword.get(options, :limit, 10)
|
|
lang = Keyword.get(options, :lang, "en")
|
|
coords = Keyword.get(options, :coords, nil)
|
|
endpoint = Keyword.get(options, :endpoint, endpoint(__MODULE__))
|
|
|
|
case method do
|
|
:search ->
|
|
url = "#{endpoint}/api/?q=#{URI.encode(args.q)}&lang=#{lang}&limit=#{limit}"
|
|
if is_nil(coords), do: url, else: url <> "&lat=#{coords.lat}&lon=#{coords.lon}"
|
|
|
|
:geocode ->
|
|
"#{endpoint}/reverse?lon=#{args.lon}&lat=#{args.lat}&lang=#{lang}&limit=#{limit}"
|
|
end
|
|
end
|
|
|
|
@spec fetch_features(String.t()) :: list(Address.t())
|
|
defp fetch_features(url) do
|
|
Logger.debug("Asking photon with #{url}")
|
|
|
|
with {:ok, %{status: 200, body: body}} <- GeospatialClient.get(url),
|
|
%{"features" => features} <- body do
|
|
process_data(features)
|
|
else
|
|
_ ->
|
|
Logger.error("Asking photon with #{url}")
|
|
[]
|
|
end
|
|
end
|
|
|
|
defp process_data(features) do
|
|
features
|
|
|> Enum.map(fn %{"geometry" => geometry, "properties" => properties} ->
|
|
coordinates = geometry |> Map.get("coordinates") |> Provider.coordinates()
|
|
|
|
%Address{
|
|
country: Map.get(properties, "country"),
|
|
locality: Map.get(properties, "city"),
|
|
region: Map.get(properties, "state"),
|
|
description: Map.get(properties, "name") || street_address(properties),
|
|
geom: coordinates,
|
|
timezone: Provider.timezone(coordinates),
|
|
postal_code: Map.get(properties, "postcode"),
|
|
street: properties |> street_address()
|
|
}
|
|
end)
|
|
end
|
|
|
|
defp street_address(properties) do
|
|
if Map.has_key?(properties, "housenumber") do
|
|
Map.get(properties, "housenumber") <> " " <> Map.get(properties, "street")
|
|
else
|
|
Map.get(properties, "street")
|
|
end
|
|
end
|
|
end
|