Nola rename: The Big Move, Refs T77

1 files changed, 190 insertions, 0 deletions

diff --git a/lib/nola_plugins/finance_plugin.ex b/lib/nola_plugins/finance_plugin.ex
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+++ b/lib/nola_plugins/finance_plugin.ex
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+defmodule Nola.IRC.FinancePlugin 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