From 30e9a0d805ec5e2e77800e26584ee5071c536a08 Mon Sep 17 00:00:00 2001
From: bumi <hello@michaelbumann.com>
Date: Sat, 3 Nov 2018 18:30:37 +0100
Subject: [PATCH] Add currency lookup helpers

add ? methods to for simple currency selection:
Openalias.addresses('donate@getmonero.org').find(&:xmr?)
---
 README.md              |  3 +++
 lib/openalias.rb       | 11 ++++++++++-
 spec/openalias_spec.rb |  7 +++++++
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 5d9d0d3..1cdd70a 100644
--- a/README.md
+++ b/README.md
@@ -36,6 +36,9 @@ Openalias.addresses('btc@michaelbumann.com')
 Openalias.addresses('donate.getmonero.org')
 => [#<Openalias::CryptoAddress cryptocurrency="xmr", address="44AFFq5kSiGBoZ4NMDwYtN18obc8AemS33DBLWs3H7otXft3XjrpDtQGv7SqSsaBYBb98uNbr2VBBEt7f2wfn3RVGQBEP3A", recipient_name="Monero Development", tx_description="Donation to Monero Core Team">, #<Openalias::CryptoAddress cryptocurrency="btc", address="1KTexdemPdxSBcG55heUuTjDRYqbC5ZL8H", recipient_name="Monero Development", tx_description="Donation to Monero Core Team">]
 
+Openalias.addresses('donate.getmonero.org').find(&:xmr?)
+=> #<Openalias::CryptoAddress cryptocurrency="xmr", address="44AFFq5kSiGBoZ4NMDwYtN18obc8AemS33DBLWs3H7otXft3XjrpDtQGv7SqSsaBYBb98uNbr2VBBEt7f2wfn3RVGQBEP3A", recipient_name="Monero Development", tx_description="Donation to Monero Core Team">
+
 Openalias.addresses('donate.getmonero.org')[0].recipient_name
 => "Monero Development"
 
diff --git a/lib/openalias.rb b/lib/openalias.rb
index 3e089e0..1d57b7d 100644
--- a/lib/openalias.rb
+++ b/lib/openalias.rb
@@ -3,7 +3,16 @@ require 'ostruct'
 
 class Openalias
   VERSION = "0.1.0"
-  class CryptoAddress < OpenStruct; end
+  class CryptoAddress < OpenStruct;
+
+    def method_missing(method_name, *args, &block)
+      if symbol = method_name[/(.*)\?\z/, 1]
+        self.cryptocurrency.to_s.downcase === symbol.to_s.downcase
+      else
+        super
+      end
+    end
+  end
 
   toplevel_dir = File.dirname(File.dirname(__FILE__))
   Thermite::Fiddle.load_module('init_openalias_rust',
diff --git a/spec/openalias_spec.rb b/spec/openalias_spec.rb
index a42f8c3..c005ee9 100644
--- a/spec/openalias_spec.rb
+++ b/spec/openalias_spec.rb
@@ -5,6 +5,13 @@ RSpec.describe Openalias do
     expect(Openalias::VERSION).not_to be nil
   end
 
+  it "provides ? methods to check for the currency" do
+    expect(Openalias.addresses('donate.getmonero.org').find { |c| c.cryptocurrency.downcase == 'xmr' }.xmr?).to eql(true)
+    expect(Openalias.addresses('donate.getmonero.org').find { |c| c.cryptocurrency.downcase == 'xmr' }.btc?).to eql(false)
+    expect(Openalias.addresses('donate.getmonero.org').find(&:xmr?).xmr?).to eql(true)
+    expect(Openalias.addresses('donate.getmonero.org').find(&:xmr?).xmr).to eql(true)
+  end
+
   it "provides accessors for the data" do
     expect(Openalias.addresses('donate.getmonero.org')[0].recipient_name).to eql('Monero Development')
     expect(Openalias.addresses('donate.getmonero.org').find { |c| c.cryptocurrency.downcase == 'xmr' }.address).to eql('44AFFq5kSiGBoZ4NMDwYtN18obc8AemS33DBLWs3H7otXft3XjrpDtQGv7SqSsaBYBb98uNbr2VBBEt7f2wfn3RVGQBEP3A')