defmodule LSG.IRC.WolframAlphaPlugin do
use GenServer
require Logger
@moduledoc """
# wolfram alpha
* **`!wa <requête>`** lance `<requête>` sur WolframAlpha
"""
def irc_doc, do: @moduledoc
def start_link() do
GenServer.start_link(__MODULE__, [], name: __MODULE__)
end
def init(_) do
{:ok, _} = Registry.register(IRC.PubSub, "trigger:wa", [plugin: __MODULE__])
{:ok, nil}
end
def handle_info({:irc, :trigger, _, m = %IRC.Message{trigger: %IRC.Trigger{type: :bang, args: query}}}, state) do
query = Enum.join(query, " ")
params = %{
"appid" => Keyword.get(Application.get_env(:lsg, :wolframalpha, []), :app_id, "NO_APP_ID"),
"units" => "metric",
"i" => query
}
url = "https://www.wolframalpha.com/input/?i=" <> URI.encode(query)
case HTTPoison.get("http://api.wolframalpha.com/v1/result", [], [params: params]) do
{:ok, %HTTPoison.Response{status_code: 200, body: body}} ->
m.replyfun.(["#{query} -> #{body}", url])
{:ok, %HTTPoison.Response{status_code: code, body: body}} ->
error = case {code, body} do
{501, b} -> "input invalide: #{body}"
{code, error} -> "erreur #{code}: #{body || ""}"
end
m.replyfun.("wa: #{error}")
{:error, %HTTPoison.Error{reason: reason}} ->
m.replyfun.("wa: erreur http: #{to_string(reason)}")
_ ->
m.replyfun.("wa: erreur http")
end
{:noreply, state}
end
end
