defmodule Nola.Plugins.Finance do
require Logger
@moduledoc """
# finance
Données de [alphavantage.co](https://alphavantage.co).
## forex / monnaies / crypto-monnaies
* **`!forex <MONNAIE1> [MONNAIE2]`**: taux de change entre deux monnaies.
* **`!forex <MONTANT> <MONNAIE1> <MONNAIE2>`**: converti `montant` entre deux monnaies
* **`?currency <recherche>`**: recherche une monnaie
Utiliser le symbole des monnaies (EUR, USD, ...).
## bourses
* **`!stocks <SYMBOLE>`**
* **`?stocks <recherche>`** cherche un symbole
Pour les symboles non-US, ajouter le suffixe (RNO Paris: RNO.PAR).
"""
@currency_list "http://www.alphavantage.co/physical_currency_list/"
@crypto_list "http://www.alphavantage.co/digital_currency_list/"
HTTPoison.start()
load_currency = fn(url) ->
resp = HTTPoison.get!(url)
resp.body
|> String.strip()
|> String.split("\n")
|> Enum.drop(1)
|> Enum.map(fn(line) ->
[symbol, name] = line
|> String.strip()
|> String.split(",", parts: 2)
{symbol, name}
end)
|> Enum.into(Map.new)
end
fiat = load_currency.(@currency_list)
crypto = load_currency.(@crypto_list)
@currencies Map.merge(fiat, crypto)
def irc_doc, do: @moduledoc
def start_link() do
GenServer.start_link(__MODULE__, [], name: __MODULE__)
end
def init([]) do
regopts = [plugin: __MODULE__]
{:ok, _} = Registry.register(IRC.PubSub, "trigger:forex", regopts)
{:ok, _} = Registry.register(IRC.PubSub, "trigger:currency", regopts)
{:ok, _} = Registry.register(IRC.PubSub, "trigger:stocks", regopts)
{:ok, nil}
end
def handle_info({:irc, :trigger, "stocks", message = %{trigger: %{type: :query, args: args = search}}}, state) do
search = Enum.join(search, "%20")
url = "https://www.alphavantage.co/query?function=SYMBOL_SEARCH&keywords=#{search}&apikey=#{api_key()}"
case HTTPoison.get(url) do
{:ok, %HTTPoison.Response{status_code: 200, body: data}} ->
data = Poison.decode!(data)
if error = Map.get(data, "Error Message") do
Logger.error("AlphaVantage API invalid request #{url} - #{inspect error}")
message.replyfun.("stocks: requête invalide")
else
items = for item <- Map.get(data, "bestMatches") do
symbol = Map.get(item, "1. symbol")
name = Map.get(item, "2. name")
type = Map.get(item, "3. type")
region = Map.get(item, "4. region")
currency = Map.get(item, "8. currency")
"#{symbol}: #{name} (#{region}; #{currency}; #{type})"
end
|> Enum.join(", ")
items = if items == "" do
"no results!"
else
items
end
message.replyfun.(items)
end
{:ok, resp = %HTTPoison.Response{status_code: code}} ->
Logger.error "AlphaVantage API error: #{code} #{url} - #{inspect resp}"
message.replyfun.("forex: erreur (api #{code})")
{:error, %HTTPoison.Error{reason: error}} ->
Logger.error "AlphaVantage HTTP error: #{inspect error}"
message.replyfun.("forex: erreur (http #{inspect error})")
end
{:noreply, state}
end
def handle_info({:irc, :trigger, "stocks", message = %{trigger: %{type: :bang, args: args = [symbol]}}}, state) do
url = "https://www.alphavantage.co/query?function=GLOBAL_QUOTE&symbol=#{symbol}&apikey=#{api_key()}"
case HTTPoison.get(url) do
{:ok, %HTTPoison.Response{status_code: 200, body: data}} ->
data = Poison.decode!(data)
if error = Map.get(data, "Error Message") do
Logger.error("AlphaVantage API invalid request #{url} - #{inspect error}")
message.replyfun.("stocks: requête invalide")
else
data = Map.get(data, "Global Quote")
open = Map.get(data, "02. open")
high = Map.get(data, "03. high")
low = Map.get(data, "04. low")
price = Map.get(data, "05. price")
volume = Map.get(data, "06. volume")
prev_close = Map.get(data, "08. previous close")
change = Map.get(data, "09. change")
change_pct = Map.get(data, "10. change percent")
msg = "#{symbol}: #{price} #{change} [#{change_pct}] (high: #{high}, low: #{low}, open: #{open}, prev close: #{prev_close}) (volume: #{volume})"
message.replyfun.(msg)
end
{:ok, resp = %HTTPoison.Response{status_code: code}} ->
Logger.error "AlphaVantage API error: #{code} #{url} - #{inspect resp}"
message.replyfun.("stocks: erreur (api #{code})")
{:error, %HTTPoison.Error{reason: error}} ->
Logger.error "AlphaVantage HTTP error: #{inspect error}"
message.replyfun.("stocks: erreur (http #{inspect error})")
end
{:noreply, state}
end
def handle_info({:irc, :trigger, "forex", message = %{trigger: %{type: :bang, args: args = [_ | _]}}}, state) do
{amount, from, to} = case args do
[amount, from, to] ->
{amount, _} = Float.parse(amount)
{amount, from, to}
[from, to] ->
{1, from, to}
[from] ->
{1, from, "EUR"}
end
url = "https://www.alphavantage.co/query?function=CURRENCY_EXCHANGE_RATE&from_currency=#{from}&to_currency=#{to}&apikey=#{api_key()}"
case HTTPoison.get(url) do
{:ok, %HTTPoison.Response{status_code: 200, body: data}} ->
data = Poison.decode!(data)
if error = Map.get(data, "Error Message") do
Logger.error("AlphaVantage API invalid request #{url} - #{inspect error}")
message.replyfun.("forex: requête invalide")
else
data = Map.get(data, "Realtime Currency Exchange Rate")
from_name = Map.get(data, "2. From_Currency Name")
to_name = Map.get(data, "4. To_Currency Name")
rate = Map.get(data, "5. Exchange Rate")
{rate, _} = Float.parse(rate)
value = amount*rate
message.replyfun.("#{amount} #{from} (#{from_name}) -> #{value} #{to} (#{to_name}) (#{rate})")
end
{:ok, resp = %HTTPoison.Response{status_code: code}} ->
Logger.error "AlphaVantage API error: #{code} #{url} - #{inspect resp}"
message.replyfun.("forex: erreur (api #{code})")
{:error, %HTTPoison.Error{reason: error}} ->
Logger.error "AlphaVantage HTTP error: #{inspect error}"
message.replyfun.("forex: erreur (http #{inspect error})")
end
{:noreply, state}
end
def handle_info({:irc, :trigger, "currency", message = %{trigger: %{type: :query, args: args = search}}}, state) do
search = Enum.join(search, " ")
results = Enum.filter(@currencies, fn({symbol, name}) ->
String.contains?(String.downcase(name), String.downcase(search)) || String.contains?(String.downcase(symbol), String.downcase(search))
end)
|> Enum.map(fn({symbol, name}) ->
"#{symbol}: #{name}"
end)
|> Enum.join(", ")
if results == "" do
message.replyfun.("no results!")
else
message.replyfun.(results)
end
{:noreply, state}
end
defp api_key() do
Application.get_env(:nola, :alphavantage, [])
|> Keyword.get(:api_key, "demo")
end
end
