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add PirateWeather data source (based on DarkSky API) (#24)
* mv module * add PirateWeather data source (based on DarkSky) * switch to Jason + updates deps + fix warnings and format
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,4 +1,4 @@ | ||
| import Mix.Config | ||
| import Config | ||
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| config :forecastr, | ||
| appid: System.get_env("FORECASTR_API_KEY"), | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,161 @@ | ||
| defmodule Forecastr.PirateWeather do | ||
| @moduledoc false | ||
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| alias Forecastr.Geocoder | ||
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| @type when_to_forecast :: :today | :next_days | ||
| @spec weather(when_to_forecast, String.t(), map()) :: {:ok, map()} | {:error, atom()} | ||
| def weather(when_to_forecast, query, opts) do | ||
| case api_endpoint(when_to_forecast) do | ||
| nil -> | ||
| {:error, :no_api_key} | ||
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| endpoint -> | ||
| params = convert_params(opts) | ||
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| %{ | ||
| "lat" => lat, | ||
| "lon" => lon, | ||
| "address" => %{ | ||
| "city" => city, | ||
| "country" => country | ||
| } | ||
| } = | ||
| query | ||
| |> Geocoder.geocode() | ||
| |> pick_location() | ||
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| with {:ok, forecast} <- fetch_weather_information(endpoint <> "/#{lat},#{lon}", params) do | ||
| {:ok, | ||
| forecast | ||
| |> add("name", city) | ||
| |> add("country", country) | ||
| |> add("when_to_forecast", Atom.to_string(when_to_forecast))} | ||
| end | ||
| end | ||
| end | ||
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| @spec normalize(map()) :: {:ok, map()} | ||
| @doc """ | ||
| Normalize for today's weather or for the next 3 days weather | ||
| """ | ||
| def normalize(%{ | ||
| "when_to_forecast" => "today", | ||
| "name" => name, | ||
| "country" => country, | ||
| "latitude" => lat, | ||
| "longitude" => lon, | ||
| "currently" => %{"temperature" => temp = temp_max = temp_min} = weather | ||
| }) do | ||
| normalized = | ||
| weather | ||
| |> extract_main_weather() | ||
| |> add("name", name) | ||
| |> add("country", country) | ||
| |> add("coordinates", %{"lat" => lat, "lon" => lon}) | ||
| |> add("temp", temp) | ||
| |> add("temp_max", temp_max) | ||
| |> add("temp_min", temp_min) | ||
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| {:ok, normalized} | ||
| end | ||
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| def normalize(%{ | ||
| "when_to_forecast" => "next_days", | ||
| "name" => name, | ||
| "country" => country, | ||
| "latitude" => lat, | ||
| "longitude" => lon, | ||
| "hourly" => %{"data" => forecast_list} | ||
| }) | ||
| when is_list(forecast_list) do | ||
| normalized = | ||
| Map.new() | ||
| |> add("name", name) | ||
| |> add("country", country) | ||
| |> add("coordinates", %{"lat" => lat, "lon" => lon}) | ||
| |> add("list", forecast_list |> Enum.map(&normalize_forecast_list/1)) | ||
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| {:ok, normalized} | ||
| end | ||
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| defp fetch_weather_information(endpoint, opts) do | ||
| case HTTPoison.get(endpoint, [], params: opts) do | ||
| {:ok, %HTTPoison.Response{status_code: 200, body: body}} -> | ||
| {:ok, Jason.decode!(body)} | ||
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| {:ok, %HTTPoison.Response{status_code: 404}} -> | ||
| {:error, :not_found} | ||
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| {:ok, %HTTPoison.Response{status_code: 400}} -> | ||
| {:error, :not_found} | ||
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| {:ok, %HTTPoison.Response{status_code: 401}} -> | ||
| {:error, :api_key_invalid} | ||
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| error = {:error, _reason} -> | ||
| error | ||
| end | ||
| end | ||
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| defp extract_main_weather(weather) do | ||
| %{"summary" => main_weather_condition, "icon" => icon_name} = weather | ||
| %{"description" => main_weather_condition, "id" => icon_name} | ||
| end | ||
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| defp normalize_forecast_list(%{ | ||
| "summary" => main_weather_condition, | ||
| "icon" => icon, | ||
| "temperature" => temp = temp_max = temp_min, | ||
| "time" => time | ||
| }) do | ||
| date = time |> DateTime.from_unix!() |> DateTime.to_date() |> to_string() | ||
| time = time |> DateTime.from_unix!() |> DateTime.to_time() |> to_string() | ||
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| Map.new() | ||
| |> add("temp", temp) | ||
| |> add("temp_max", temp_max) | ||
| |> add("temp_min", temp_min) | ||
| |> add("dt_txt", "#{date} #{time}") | ||
| |> add("dt", time) | ||
| |> add("description", main_weather_condition) | ||
| |> add("id", icon) | ||
| end | ||
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| defp add(map, key, value) do | ||
| map | ||
| |> Map.put(key, value) | ||
| end | ||
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| @spec api_endpoint(when_to_forecast) :: String.t() | ||
| def api_endpoint(_) do | ||
| case Application.get_env(:forecastr, :appid) do | ||
| appid when is_binary(appid) and appid != "" -> | ||
| "https://api.pirateweather.net/forecast/#{appid}" | ||
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| _ -> | ||
| nil | ||
| end | ||
| end | ||
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| defp convert_params(%{units: :imperial} = params), do: Map.put(params, :units, "us") | ||
| defp convert_params(%{units: _} = params), do: Map.put(params, :units, "si") | ||
| defp convert_params(%{} = params), do: params | ||
| defp convert_params(params) when is_list(params), do: Map.new(params) |> convert_params() | ||
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| defp pick_location(%{"address" => %{"city" => _city}} = body), do: body | ||
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| defp pick_location(%{"address" => %{"town" => town}} = body), | ||
| do: put_in(body, ["address", "city"], town) | ||
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| defp pick_location(%{"address" => %{"village" => village}} = body), | ||
| do: put_in(body, ["address", "city"], village) | ||
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| defp pick_location(%{"address" => %{"province" => province}} = body), | ||
| do: put_in(body, ["address", "city"], province) | ||
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| defp pick_location(%{"address" => %{"suburb" => suburb}} = body), | ||
| do: put_in(body, ["address", "city"], suburb) | ||
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| defp pick_location({"address", address}), do: %{"address" => address} |> pick_location() | ||
| end |
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